Front-matter_2019_Digital-Twin-Driven-Smart-Manufacturing

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坚定的巨人连续数字无线电脑说明书

Digital Wireless ComputerUser’s Manual- English -Table of contentsThank you for purchasing Giant's Continuum Sync Digital Wireless Computer. For your safety, we recommend that you look straight ahead while riding. Avoid staring at thecomputer scre en. This may compromise your awareness, leading to a serious accident.Ensure that the head unit has been paired with the speed sensor before using your computer.If you have any questions or problems,please contact your local Giant dealer or go to Giant's ofﬁcial website: Let's go ride!PrefaceThe Continuum Sync comes with one head unit and three accessories1.Head unit2.Head unit battery3.Handlebar/stem mount4.Mount base pads5.Speed and cadence sensor6.Speed sensor battery7.Cadence sensor magnet8.Speed sensor magnet9.Cadence sensor magnet pads10.Rubber straps 11.Zip tiesHead Unit Base Unit Sensor UnitStrapsX 5( For 410000051 / 410000052 ONLY )Package contents123456ororDisplay & ButtonsDisplay & buttonsReset Trip LogsResetIf the computer does not func-tion normally or the screen is blank after the battery isinstalled, either press the S key on the back of the head unit to reset settings or press the AC key to reset the computer to factory default settings.To reset logs, press R for 3 seconds.Display & buttonsPress the S key to enter time format mode, press the L key to select 12Hr or 24Hr. Press the R key to conﬁrm and move to time setup mode.Press the L key to increase the hour value (Press the L key for two seconds (L2) to rapidly increase values). Press the R key to conﬁrm. Press the L key to increase the minute value. Press the R key to conﬁrm and move to alarm setup.Set Time FormatSet TimeSet alarmSet time format / timeTurn Alarm On / OffAfter entering alarm setup mode,press the L key to turn the alarm On orOff. Press the R key to conﬁrm andmove to alarm time setup mode.Press the L key to increase the hourvalue. Press the R key to conﬁrm.Press the L key to increase the minutevalue. Press the R key to conﬁrm andmove to bike/wheel size setup.*The alarm is a ﬂashing light only.Set bike / wheel sizeSet alarmSet BikeSet Wheel SizeAfter entering bike setup mode, press the L key to select Bike 1 or 2. Press the R key to conﬁrm and move to wheel size setup mode.Press the L key to select from ten pre-programmed wheel sizes.Press the R key to conﬁrm. If wheel size is not shown, move to custom wheel circumference setup.Press the L key to increase the ﬁrst number.Press the R key to conﬁrm and move to the next number. When all numbers are set, press the R key to conﬁrm and move to units/odometer setup mode.*Same as Bike2 settingWHEEL CIRCUMFERENCESet bike / wheel sizeAfter entering unit setup mode, press the L key to select km/h(kilometers/hour) or m/h (miles/hour). Press the R key to conﬁrm and move to odometer setup mode.Press the L key to increase the ﬁrst number. Press the R key to conﬁrm and move to the next number. When all numbers are set, press the R key to conﬁrm and move to gender/weight setup.Set UnitsSet OdometerSet gender / weightUnit setting / odometerAfter entering gender setup mode,press the L key to select MALE or FEMALE. Press the R key to conﬁrm and move to weight setup mode.Press the L key to increase the weight number.Press the R key to conﬁrm and move tobacklight/maintenance alert setup.Set Gender Set WeightSet gender / weightAfter entering backlight setup mode, press the L key to select smart backlight "on" time. Press the R key to conﬁrm. Press the L key to select the smart backlight “off” time. Press the R key toconﬁrm and move to maintenance alert setup mode.Press the L key to set themaintenance alert to your desired distance (300-700 km or 180-430 mi). Press the R key to conﬁrm and move to select/pair sensor mode.If set to 500 km, the computer will display every time theaccumulated trip distance reaches 500 km. Trip distance and total distance are logged separately.Press R for 2 seconds or ride 50km to clear the alert symbol.Set Backlight Set Maintenance AlertSelect sensorSet backlight / maintenance alertSelect SensorSENSOR ModeSelect sensorAfter entering select sensor mode, press the L key to select SENSOR, PHONE, or OUT. Press the R key to conﬁrm. Selecting OUT will exit setup mode. Selecting SENSOR or PHONE will enter pairing mode for that sensor.SENSOR mode: To pair heart rate strap wear the strap on your chest. To pair, speed/cadence sensor, rotate the cranks to activate the sensor. Press the R key to enable device pairing for 30 seconds. The ride screen displays after 30 seconds.PHONE mode: Enable Bluetooth pairing on your phone. Enter the veriﬁcation code shown on the computer to your phone in within 1 minute to start pairing. The ride screen displays if pairing is successful, FAIL displays if pairing was not successful.*See page 15 for app connection.Select / pair sensorSensor ModeSensor and Phone ModePhone ModeIn the ride screen, press the L2 key to switch between phone mode and sensor mode.Sensors paired only:If computer is paired with sensors only, the computer will not work if you switch to phone mode.Sensor and phone paired:If computer is paired with sensors and phone, you can switch to either of these two modes and the computer will work normally.Phone paired only:If computer is paired with phone only, the computer will not work if you switch to sensor mode.ANT +Sensor modePress L key to select cadence or heart rate in sensor mode.Press R key to select RTM, DST, ODO, KCAL, Heart Rate, Clock, AVE or MAX.*AVE and MAX will be displayed when bike is not running.*Heart rate will be displayed after a heart rate belt is paired successfully.*Fast pairing:In sensor mode, press and hold both L and R keys for 3 seconds to enter theANT+ pairing mode.When bike is not runningOperation in sensor modeWhen bike is not runningPress L key to select cadence, heart rate or incoming call in phone mode.Press R key to select RTM, DST, ODO, KCAL, Heart Rrate, Clock, AVE or MAX.*AVE and MAX will be displayedwhen bike isnot running.*Heart rate will be displayed aftera heart rate belt is paired successfully.*Fast pairing:In phone mode, press and hold both L and R keys for 3 seconds to enter the Bluetooth pairing mode(see page 15.)Operation in phone mode1126First ridingCompatible with iPhone 4s/App connection213141615173Computer ﬁrmware updateManual update34Manual updateComputer ﬁrmware update167*Ensure your Continuum Sync is paired with your phone before attempting to import ride data. Only run the import function while the computer is in sensor mode.Running the import function while the com-puter is in phone mode will erase your ride data.Import the trip logs to appTroubleshootingSpeciﬁcations。

飞础科2019新品发布圆满落幕,开启热像AI时代!

9月19日下午，我司2019新品发布会在上海成功举办，合作伙伴、T-Men 以及热像爱好者二百多位嘉宾出席，共同迎接新品面市，开启热像的AI （人工智能）时代；一起见证品牌中文名“飞础科”的发布与启用。

创新，不停歇回顾2018年，我司推出的X 云热像收获了不菲的成绩，覆盖电力、冶金、制造业、科研等重点行业，客户覆盖全国约95%省市，并荣获德国iF 国际工业设计大奖。

我们不骄傲，深谙创新还不够，正如品牌价值观“创新、正直、极致”所示，创新居于首位。

今天，发布会震撼亮相六大新品系列， 340、330、340X 、330X 、320pro 、320c ，共计25个热像仪型号，与现有产品线相辅相成，构建更完善的产品矩阵，满足市场需求。

正直，来守护做到创新不是一件容易的事，我们坚守正直，遵循先人后事的法则。

打破部门壁垒、推动信息公开、增强团队协作，扫除创新路上的障碍。

与此同时，我们又是有温度的，一直致力于为用户“提升效率、保障安全”而进行技术创新。

本场发布的新品定位在市场容量最大的中端手持市场，为用户提供更多的可靠选择。

如320pro、320c系列，基于全新平台打造，更具竞争力；340、330系列，搭载自主研发的多项硬核技术——HawkAI、MagicThermal、TurboFocus，点燃全场。

在当今智能革命的大环境下，我们瞄准未来，利用人工智能技术，为新品植入敏捷、智慧基因，开发出“智能助手”HawkAI，具备语音控制、语音听写、文本识别等功能，让热像仪操作智能化的梦想不再遥不可及。

而MagicThermal细节增强成像技术，如其名般具有魔法能力，大幅提升多色动态成像、画中画和可见光测温的用户体验。

极致，是态度340X、330X系列，属于云热像，具备慧管理、慧诊断、慧预测、慧快十倍四大功能，可以实现PdM预测性维护。

从2017年至今，飞础科持续打磨云热像，从V1.0升级至V3.0版本，未来，仍将不断突破功能创新，为用户呈现精益求精的产品。

智能网联汽车云控系统及其实现

汽车工程Automotive Engineering2020年(第42卷)第12期2020(Vol.42)No.12 doi：10.19562/j.chinasae.qcgc.2020.12.001智能网联汽车云控系统及其实现李克强1,常雪阳「，李家文2,许庆1,高博麟「，潘济安1(1.清华大学，汽车安全与节能国家重点实验室，北京100084； 2.启迪云控(北京)科技有限公司，北京100084)［摘要］本文中提岀了基于信息物理系统(cyber-physical system,CPS)理论的智能网联汽车云控系统概念，该系统利用新一代信息与通信技术，将人、车、路、云的物理层、信息层、应用层连为一体，进行融合感知、决策与控制，可实现车辆行驶和交通运行安全、效率等性能的综合提升。

在介绍系统架构、工作原理与关键技术的基础上，研究了边缘云上融合感知技术与时变时延下车辆控制技术,开发了面向真实道路的云控系统。

通过仿真与道路试验，验证了系统的云端计算、融合感知、融合决策与网联控制的性能,展示了系统实际应用的可行性与先进性。

关键词：智能网联汽车；云控系统;信息物理系统;融合感知；网联车辆控制Cloud Control System for Intelligent and Connected Vehicles and Its ApplicationLi Keqiang1,Chang Xueyang1,Li Jiawen2,Xu Qing1,Gao Bolin1&Pan Jian11.Tsinghua University,State Key厶aboratory of Automotive Safety and Energy,Beijing100084；2.TUS Cloud Control(Beijing)Technology Co.,Ltd.,Beijing100084[Abstract]In this paper,the concept of cloud control system for intelligent and connected vehicles is proposed based on the theory of cyber-physical system(CPS).The system uses the new generation of information and communication technologies to integrate the physical layer,cyber layer and application layer of human,vehicles, road infrastructures and cloud for integrated perception,decision-making and control to realize comprehensive improvement of vehicles and traffic safety and efficiency.Based on the introduction of the system architecture,working principle and key technologies,integrated perception technology on edge cloud and vehicle control technology under time-varying delay are studied.Furthermore,a cloud control system for real road is developed.Simulation and field test results verify the performance of cloud computing,integrated perception,decision-making,and connected control of the proposed system,which demonstrates its feasibility and superiority in application.Keywords:intelligent connected vehicles；cloud control system；cyber-physical system；integrated perception；networked vehicle control前言自动驾驶是汽车与交通领域的颠覆性技术，正引发学术界和工业界开展广泛且深入的研究。

恩智浦S32R274汽车雷达处理器应用指南说明书

by:NXP Semiconductors1Introduction The S32R274 is a 32-bit Power Architecture ® based Microcontroller (MCU) unitfor automotive applications. It extends the MPC5775K family by a value deviceoptimized for surround RADAR sensors and midrange front RADAR sensors.The family members are designed to address advanced RADAR signalprocessing capabilities and merge it with microcontroller capabilities forgeneric software tasks and car bus interfacing.S32R274 meets the high performance computation demands required by modern beamforming fast chirp modulation RADAR systems by offering unique signal processing acceleration together with powerful multi-core architecture.The S32R274 supports automotive safety applications that require a highSafety Integrity Level (ASIL) and adds SHE compliant security features toprevent unauthorized manipulations. The high integration level of S32R274 enables the customer to build compact, safe and secure, low cost RADAR sensors with leading edge performance. The family members have a high level of software compatible for shared hardware modules.S32R274 is a high end automotive MCU designed to support computation intensive application, like ADAS RADAR.Figure 1.RADAR application overview2Signal Processing Toolbox (SPT) in S32R familyIn radar signal processing or acceleration, Signal Processing T oolbox (SPT) and Z7 SIMD units are used.•Accelerated hardware FFT , vector math, peak search, statistics•Generic DSP functionality with SPE and VFPU unit of Z7 coresSignal Processing T oolbox (SPT) contains all the hardware modules required for processing of the sampled RADAR signals. It is a powerful processing engine containing high-performance signal processing operations, driven by a specific use-orientedinstruction set. The programmability ensures flexibility for modifications of signal processing. The CPU is removed from frequent scheduling of hardware operations, but still controls and interacts with the processing flow.Contents1 Introduction (1)2 Signal Processing Toolbox (SPT)in S32R family....................................13 SPT execution......................................34 SPT internal memory...........................45 Common instruction fields.................46 SPT programming................................47 Conclusion. (6)8 Reference.............................................7AN12424SPT Programming on S32R Rev. 0 — May 2019Application NoteSPT is connected to the device by an advanced high performance master bus and a peripheral bus.Figure 2.SPT in S32R274 block diagramThe system bus master interface performs fast data transfers between external memory and local RAM.The purpose of the peripheral interface is to set configuration, get status information and basic control of SPT (start/stop, program pointer) and to trigger interrupts. It can also be used to exchange small amounts of the data between the CPU and the SPT , such as constant operands.Figure 3.SPT block diagramIt has the following features:•Acquisition of ADC samples—Capturing of ADC samples within programmed window—On-the-fly statistical computation—Supports MIPICSI2 interface•Provides HW acceleration for—FFT (8 - 4096 point)—Histogram calculation—Maximum and peak searchSignal Processing Toolbox (SPT) in S32R family—Mathematical operations on vector data•High-speed DMA data transfer—Supports system RAM, TCM and Flash memory transfers—Includes compression/decompression capability for reduction of storage footprint•Instruction based program flow—High-level commands for signal processing operations—Simple control commands—Local instruction buffer—Automatic instruction fetch from main memory—CPU interaction possible•CPU interruption notification•Watchdog•Debug Support - Single Stepping and Jamming ModeIt has three operation modes:1.STOP mode2.System Debug mode3.Normal mode3SPT executionThe SPT executes a list of instructions. These commands contain all the information to perform signal processing operations on data vectors consisting of a set of numbers. The instruction list is provided by the CPU in a memory buffer (SRAM or flash) and read by the SPT with autonomous triggered DMA operations. Preparation of command scripts is performed off-line duringdevelopment on a different system, such as a PC.Figure 4.SPT operation modelData as results or inputs of signal processing operations can be transferred between operand/twiddle RAM and system RAM or TCM by DMA operations. These kind of DMA operations are also scheduled by commands in the script.CPU application software functions may be invoked between signal processing operations. In order to synchronize these SW functions with the processing flow, interrupts and polling flags are provided, which may be activated as a result of specificcommands. In the same way, eDMA operations can be triggered from the SPT . The data transfer descriptors need to be prepared by application software.T o enable advanced and precisely timed pipelining of HW assisted operations, SPT command execution can also be synchronized with or triggered by events from CTE or MIPICSI2.SPT executionSPT internal memoryProgram execution is performed by a dedicated register machine. The program execution may be stalled at the end of each command and can be synchronized with events provided by the CTE or MIPICSI2. The CPU can stop and release program execution and execute its own instructions in the same time.The SPT command sequence is provided by CPU SW and written to a buffer in the system RAM or flash, where CSDMA fetches or alternatively transfers the list of instructions to the command queue.The program is executed sequentially, one command following the next in the chain with the exception being loops and asynchronous PDMA instruction. The end of a sequence is marked with a specific termination command. The start address of the instruction sequence is configured by application software using the peripheral interface.The command queue stores a number of instructions to be executed, which may be a shorter sequence than the complete instruction list. It maintains an instruction pointer to the current executed operation, which is incremented when the current operation is completed. This instruction pointer indicates the position in the complete instruction list sequence relative to the first instruction.Loop instructions are special cases, the program sequence may continue with a lower address depending on the state of the loop counter. The start and next command address of the loops are saved in special registers. Up to four nested loops are supported. Jump instructions or branch instructions are another case where the program may cause the program to branch to a non-contiguous address location. It is the responsibility of the assembler to ensure that the sanity of the program structure is not violated i.e. infinite loops, jumping into or out of a loop, etc.4SPT internal memorySPT contains internal memory resources namely, Operand RAM, Twiddle RAM and work registers. Out of these, only the work registers can be directly accessed via the peripheral interface and are visible on the SPT external memory map.The CPU can access these internal memory resources via the hardware accelerators. The instruction bitfields SRC_ADD and DEST_ADD point to these memories.The Twiddle RAM extends from location 0x4000 to 0x4FFF. However the area from 0x5000 to 0x7FFF is aliased to the Twiddle RAM i.e. it wraps around to point to the T widdle RAM. It should be noted that the memory accesses to the T widdle RAM should not cross the area from 0x4000 to 0x7FFF.The Operand RAM extends from location 0x8000 to 0xBFFF. But the area from 0xC000 to 0xFFFF is aliased to the Operand RAM. The memory accesses to the Operand RAM should not cross the area from 0x8000 to 0xFFFF.5Common instruction fieldsCommon instructions contains the following fields.•Opcode•Source and Destination address•Indirect Memory address•Source and destination address increment•Vector size•Input datatype/preprocessing6SPT programming6.1Programming based on RSDKNXP Radar SDK(RSDK) provides basic radar processing algorithms and device drivers for S32R hardware devices. Its purpose is to facilitate radar algorithm development (using SPT kernels, MA TLAB models), creation of higher level algorithms (starting from the basic blocks supplied with RSDK) and easy application development by integrating driver and platform support.Radar SDK (Radar SDK for S32R27 SPT accelerator ) could be downloaded from NXP website.RSDK SPT module consists of the SPT Driver, SPT Kernels software components.The SPT Driver serves as an interface between the user application running on the host CPU cores and the SPT hardware. The figure below shows a high-level block diagram of SPT software architecture. Its purpose is to enable the integration and executionof low-level microcode kernels on the SPT (Signal Processing T oolbox) accelerator for baseband radar signal processing.Figure 5.SPT software architectureThe SPT Kernels are individual precompiled routines of SPT code packed into a library, each implementing a part of the radar processing flow.T ogether, the SPT Driver and SPT Kernels library provide a software abstraction of the built-in SPT hardware functions (e.g. FFT ,Maximum Search, Histogram etc.) combined in a series of algorithms.The RSDK package also includes RSDK Sample Applications showing how to integrate these software components into the user code.6.2Programming based on graphic toolS32 Design Studio SPT graphical tool allows user to use graphical modeling workbench by leveraging the Eclipse Modeling technologies. It provides a workbench for model-based architecture engineering. Graphical tool equips teams who have to deal with complex architectures. The graphical tool includes everything necessary to easily create and manipulate models. The output of this tool is SPT assembler source code.The SPT graphical tool is integrated with the New S32DS Project wizard for devices which have SPT module. SPT1, SPT2 and SPT2.5 versions of SPT modules are supported. The SPT graphical tool can be used after project creation with the new graph tools project wizard. For detailed description of new project wizards, please read S32 Design Studio for Power Architecture, Version 2017.R1 reference manual.After the project is generated, SPT graphical tool windows could be gotten in IDE. User could drag 'Instructions', 'Flow' and 'Directives' from Palette window into working flow window.SPT programmingEach 'Instructions', 'Flow' or 'Directives' could change their setting in properties window. After finished the design of SPT working flow, generate SPT code through right click mouse.Figure 6.Generate project with SPT graphical toolFigure 7.SPT graphical tool windowsFigure 8.Example working flow and generate code7ConclusionThe SPT is a powerful processing engine containing high-performance signal processing operations driven by a specific instruction set. Its programmability ensures flexibility while removing the CPU from frequent scheduling of hardware operations, while still controlling and interacting with the processing flow. RSDK supports the API of SPT for customer and graphics tool for SPT programming could meet the flexible design request.8Reference•S32R274 Reference Manual•Radar SDK for S32R27 SPT accelerator •AN5375, S32R RADAR Signal CompressionHow To Reach Us Home Page: Web Support: /support Information in this document is provided solely to enable system and software implementers to use NXP products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits based on the information in this document. NXP reserves the right to make changes without further notice to any products herein.NXP makes no warranty, representation, or guarantee regarding the suitability of its products for any particular purpose, nor does NXP assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters that may be provided in NXP data sheets and/or specifications can and do vary in different applications, and actual performance may vary over time. All operating parameters, including “typicals,” must be validated for each customer application by customer's technical experts. NXP does not convey any license under its patent rights nor the rights of others. NXP sells products pursuant to standard terms and conditions of sale, which can be found at the following address: / SalesTermsandConditions.While NXP has implemented advanced security features, all products may be subject to unidentified vulnerabilities. Customers are responsible for the design and operation of their applications and products to reduce the effect of these vulnerabilities on customer’s applications and products, and NXP accepts no liability for any vulnerability that is discovered. Customers should implement appropriate design and operating safeguards to minimize the risks associated with their applications and products.NXP, the NXP logo, NXP SECURE CONNECTIONS FOR A SMARTER WORLD, COOLFLUX, EMBRACE, GREENCHIP, HIT AG, I2C BUS, ICODE, JCOP, LIFE VIBES, MIFARE, MIFARE CLASSIC, MIFARE DESFire, MIFARE PLUS, MIFARE FLEX, MANTIS, MIFARE ULTRALIGHT, MIFARE4MOBILE, MIGLO, NTAG, ROADLINK, SMARTLX, SMARTMX, ST ARPLUG, TOPFET, TRENCHMOS, UCODE, Freescale, the Freescale logo, AltiVec, C‑5, CodeTEST, CodeWarrior, ColdFire, ColdFire+, C‑Ware, the Energy Efficient Solutions logo, Kinetis, Layerscape, MagniV, mobileGT, PEG, PowerQUICC, Processor Expert, QorIQ, QorIQ Qonverge, Ready Play, SafeAssure, the SafeAssure logo, StarCore, Symphony, VortiQa, Vybrid, Airfast, BeeKit, BeeStack, CoreNet, Flexis, MXC, Platform in a Package, QUICC Engine, SMARTMOS, Tower, TurboLink, and UMEMS are trademarks of NXP B.V. All other product or service names are the property of their respective owners. AMBA, Arm, Arm7, Arm7TDMI, Arm9, Arm11, Artisan, big.LITTLE, Cordio, CoreLink, CoreSight, Cortex, DesignStart, DynamIQ, Jazelle, Keil, Mali, Mbed, Mbed Enabled, NEON, POP, RealView, SecurCore, Socrates, Thumb, TrustZone, ULINK, ULINK2, ULINK-ME, ULINK-PLUS, ULINKpro, µVision, Versatile are trademarks or registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere. The related technology may be protected by any or all of patents, copyrights, designs and trade secrets. All rights reserved. Oracle and Java are registered trademarks of Oracle and/or its affiliates. The Power Architecture and word marks and the Power and logos and related marks are trademarks and service marks licensed by .© NXP B.V. 2019.All rights reserved.For more information, please visit: Forsalesofficeaddresses,pleasesendanemailto:**********************Date of release: May 2019Document identifier: AN12424。

六年级下册英语作文2050年我的人生

六年级下册英语作文2050年我的人生全文共6篇示例，供读者参考篇1My Life in 2050Wow, can you believe it's already 2050? It feels like just yesterday I was a little kid playing with my friends after school. Now I'm almost done with middle school and getting ready to head off to high school next year. So much has changed over the last few decades, it's hard to keep track sometimes!One of the biggest changes has definitely been all the amazing new technology we have now. Everything is so much more advanced and automated compared to when I was really little. I remember my parents telling me about how when they were kids, they had to actually drive cars themselves! Can you imagine? Having to control a huge hunk of metal hurtling down the road at crazy speeds. It seems incredibly dangerous, not to mention bad for the environment with all those emissions.Nowadays, we just call a self-driving electric car with a few taps on our phone and it whisks us wherever we need to go. No more traffic jams or stressful commutes. The cars are all linkedinto an integrated transit network that gets us around in the fastest, most efficient way possible. And since they're all zero emission electric vehicles, it's way better for the planet too.Speaking of our phones, have you seen the new VectorWave X43 that just came out? It's got holographic projection capabilities and a direct neural interface for controlling it with just your thoughts! You can video call someone and their full 3D image appears right in front of you. My friend Jamal got one and we were making faces at each other from across the room. Felt like he was actually there. The neural link takes a bit of getting used to, but once you get the hang of it, it's crazy how intuitive and responsive it is compared to the old touch screens and voice commands.School has changed a ton too with all the new tech. We don't really have physical textbooks and notebooks anymore. All our lessons and materials are delivered via augmented reality displays we wear over our eyes. You can have 3D animated models and interactive simulations pop up right on your desk during class. Makes learning things like anatomy or astronomy so much more immersive and engaging.We even get to go on virtual reality "field trips" to historically recreated sites from all around the world and across time. Justlast week, we did a walking tour of ancient Rome and I felt like I was actually there amongst the crumbling ruins and bustling city streets. My friend Alia accidentally walked right through one of the holographic roman soldiers! The crazy part is all those incredibly detailed environments are procedurally generated by an AI based on the historical data. The VR rigs can even simulate smells and physical sensations. When we hiked up Mount Vesuvius, I could feel the heat and smell the volcanic gasses like I was really there just before the eruption. So wild.Of course with all this amazing technology, we have to be really careful about things like online privacy, ethical AI development, environmental impact, and not getting too detached from the real world. There's been a lot of big debates around regulating the tech giants and their data collection practices. And whether we should put limits on certain types of AI that could be too powerful or unpredictable if they advance too far. My robotics club actually got to meet with a UN ambassador working on international AI safety guidelines last month, which was really fascinating to learn about.There's also been a massive global push towards sustainability and renewable energy over the past couple decades. The climate crisis was getting pretty scary there for awhile with all the extreme weather, droughts, and rising sea levels. But underneath it all, human innovation and determination kicked into another gear. We had a total green energy revolution with incredible breakthroughs in solar, wind, nuclear fusion, you name it. Pretty much everything now runs on clean electricity or biofuels.My parents show me pictures of what cities used to look like when I was a baby, just covered in thick smog. They say you could hardly even see the sky some days. I'm so glad we don't have to deal with that level of air pollution anymore. The oceans and forests have also made an amazing recovery after we got our act together and committed to conservation efforts on a global scale. The biodiversity levels in places like the Amazon are actually higher now than they were 30 years ago!Overall, I'd say my life in 2050 is pretty great. Yeah, there's always room for improvement and we've still got some big challenges to tackle. But I'm hopeful that my generation will help create an even better, more sustainable, and equitable future as we come of age. The possibilities are endless with the technology we have access to.Who knows, maybe by 2075 we'll have cities on Mars?! Or we'll achieve the next big leap in computing with quantumartificial general intelligence. The thought of where we could be in another 25 years is both exciting and humbling at the same time. If you had told me as a little kid that VR field trips and self-driving cars would be a reality by the time I was a teenager, I would've thought you were making it up!All I know is I feel incredibly fortunate to be coming of age in such an amazing era of rapid technological and social progress. My parents' generation and those before them laid the foundations by solving some of humanity's biggest challenges around energy, environment, and automation. It's up to me and my friends to take those achievements and run with them, pushing the boundaries of what's possible even further.I just hope we have the wisdom to wield all this incredible power and potential responsibly. With great capabilities comes great responsibilities, as they say. We'll need to be thoughtful篇2My Life in 2050Hi there! My name is Alex and I'm 12 years old. I can't even imagine what life will be like when I'm an adult in the year 2050. So much could change by then! But I'll give it my best shot to describe what I think my life might look like in a few decades.Let's start with my career. When I was little, I always loved building things with Legos and K'nex. I would spend hours putting together these crazy contraptions and machines. I think I might want to be an engineer when I grow up so I can design and create all kinds of awesome inventions and technologies. Maybe I'll end up working for a big tech company designing flying cars or super-fast transportation systems. Or perhaps I'll help develop advanced robotics or artificial intelligence systems. With how quickly technology is advancing these days, who knows what kinds of amazing devices and machines will exist by 2050!Speaking of AI, I wouldn't be surprised if by 2050 we have incredibly smart AI assistants to help us out with all sorts of tasks and decisions. Instead of searching for information on the internet, we might just ask our personal AI helper for advice and insights on anything we need. AI could help us plan our days, do research, make calculations, and so much more with amazing speed and capability. I can picture having an AI tutor that is able to explain any subject to me in the perfect way for me to understand. Of course, we'd have to be careful that the AI systems don't become too powerful and take over! But I'm hopeful AI will be a great aid to make our lives easier as long as we keep it under control.With all the advancements in technology, maybe by 2050 a lot more people will be able to work from home like many did during the Covid-19 pandemic. Instead of long commutes to offices, we might attend virtual reality meetings from special rooms in our houses. Perhaps homes will have special hologram projectors to make it feel like others are right there in the room with us for meetings and conversations. Some people might even have rooms set up to mimic different office environments to help them focus while working remotely. Robot assistants could potentially take care of household chores and cooking so we don't have to worry about that stuff while working.On second thought, perhaps by 2050 people won't have to work as much at all! With automation and AI taking care of most jobs, we might live in something like a utopian society. Humans could spend most of their time pursuing hobbies, creating art, exploring nature, or just relaxing. The government might provide a universal basic income so we don't have to stress about making money. Of course, those who want to work could take really rewarding jobs like scientists, teachers, writers, or anything their passion leads them to. The important day-to-day jobs like operating power plants, farms, and transportation could be handled by advanced robotics. So maybe I'll be a famous artist,author or athlete in 2050 with lots of free time to practice my craft!Either way, I hope my future self in 2050 remembers to take good care of the environment. With the way pollution and climate change have been impacting the planet recently, hopefully by 2050 we'll have much more sustainable energy sources and practices. Maybe we'll finally have affordable nuclear fusion reactors to provide huge amounts of clean energy. Or perhaps we'll have massive solar farms to collect energy from the sun. Cities might be designed to be fully self-sustaining with renewable energy production, vertical farming for food, recycled water systems, and zero emissions. If global leaders make smart choices, the air could be cleaner, the ice caps could recover, and animals will stop going extinct. I really hope humans can fix the climate issues we've caused so my children can grow up with a healthy planet.When I think about my personal life in 2050, I imagine I'll probably be married and possibly have kids of my own. Families might look pretty different in the future though! With all the new technologies for DNA editing and bioengineering, couples might be able to pick and choose what traits they want for their children. We could have kids with increased strength,intelligence, or other enhanced abilities. Or parents could go really crazy and give their kids wild features like wings or gills for swimming! That would be pretty cool if you ask me.I also wonder if by 2050, our understanding of human health and biology will progress so far that we'll be able to extend the human lifespan quite a bit. Maybe there will be techniques to regenerate cells and reverse aging so people live to 120 or 150 years old while still being healthy and active. If so, that could allow me to spend way more time with my future grandchildren and great-grandchildren! I hope medicine advances enough to cure all diseases too, like cancer and dementia. Wouldn't it be awesome if we could just take a pill to activate certain genes to stop any health problem in its tracks?With people living longer, maybe humanity will be able to travel farther out into space for long-duration missions and to colonize other planets or moons. I've always been fascinated by space and I hope we get to visit places like Mars in my lifetime. If life-extension technologies exist in 2050, I bet the first people to take a three-year trip to a distant planet will probably be the older explorers and scientists whose bodies can withstand that kind of mission length. Just think, by 2050 we might already haveresearch stations or even towns on the moon, Mars or Venus! There's so much to explore and discover in the universe.No matter how crazy the technology and society in 2050 is, some things will probably remain the same. Kids will still have to go to school, play sports, and deal with chores and annoying siblings. But maybe education will be much different, allowing each student to learn at their own customized pace using virtual reality environments and hologram teachers. We might be able to take fieldtrip adventures to any location or time period thanks to extremely realistic simulations too. Video games and entertainment in 2050 will be absolutely mind-blowing with settings and character that look 100% photorealistic. I can't even imagine all the things my kids or grandkids will take for granted as normal in 2050.So while I have no idea exactly how my life in the year 2050 will turn out, I'm definitely excited to see what the future holds! I hope I'll get to live in an advanced world with amazing technology that improves life for everyone. As long as we're responsible about using our human ingenuity in positive ways, maybe the future really can be this perfect utopia we've been dreaming about. I guess only time will tell what kinds of surprises are in store for me over the next few decades. But I'll do my bestto stay hopeful and make the world a little bit better every day until I get there!篇3My Life in 2050Hi there! My name is Jamie and I'm going to tell you all about what my life is like in the year 2050. It's pretty crazy how much the world has changed since my parents and grandparents were kids. Technology has advanced so much that things they could have only dreamed of are now just a normal part of everyday life. Let me give you a peek into a typical day for a12-year-old like me in the year 2050.I wake up at 7am thanks to my smart alarm clock that monitors my sleep cycles. It doesn't just blare an annoying noise, but instead slowly fills my room with natural light and pleasant aromas to wake me up gently. My smart mirrors then scan my body to make sure I'm healthy while an AI assistant greets me with a friendly "Good morning Jamie!" It gives me a quick rundown of my schedule, the weather, and anything important happening in the world.Speaking of AI, it's crazy how advanced and helpful artificial intelligence has become. My AI tutor helps me get ready forschool by quizzing me on anything I need extra practice with. It can explain tough concepts in super simple ways until I understand. I just have to think about what I'm confused about and the AI tutor can tell! How cool is that?For breakfast, I just tell our household robot what I want and it whips it up with fresh ingredients from our eco-garden out back. Our eco-gardens use special soil and lights to grow fruits and veggies with way more nutrients than old-school farming. Plus, it's all totally environmentally friendly and sustainable.Once I'm ready, I hop into our self-driving electric car that takes me to school. Don't worry, there are still safety operators monitoring all the self-driving cars just in case. But I honestly think they'll be phased out soon because the cars are so smart and cautious. No more stressful commutes for my parents!At school, we don't have to lug around heavy backpacks anymore since all our textbooks and notebooks are digital. We use these crazy thin bendable screens and smart pens to take notes and do our work. Our teachers really push us to learn skills like coding, creativity, and problem-solving since those will be crucial abilities for the future workforce.For classes like science and history, we get to go on these awesome virtual reality "field trips." One day we're exploring theancient pyramids of Egypt and the next we're walking beside towering dinosaurs. It's a way more engaging and effective way to learn compared to just篇4My Life in 2050Wow, can you believe it's already the year 2050? It seems like just yesterday I was a little kid playing with my friends in the park, and now I'm a grown-up living in a world that's so different from what I knew back then. Let me tell you all about my life in this amazing future!First of all, I have to talk about my job. I work as a virtual reality engineer, creating immersive experiences for people to explore and learn in. It's such a cool job, and I get to use all sorts of cutting-edge technology every day. My office is actually inside a virtual world, and I can just put on my VR headset and suddenly be transported to a virtual workspace with all my colleagues.Speaking of colleagues, some of them aren't even human! I work with advanced artificial intelligences that help me design and build the virtual environments. They're so smart and can come up with ideas that I never would have thought of. At first, itwas a bit weird having AI co-workers, but now it just seems normal.My daily routine is pretty different from what my parents had when they were my age. I wake up and have a quick breakfast, which is usually just a nutrient-packed smoothie made by my smart kitchen. Then I put on my VR gear and head to the office. I spend most of the day designing new virtual worlds and experiences, collaborating with my team, and testing out our creations.During my lunch break, I like to go for a walk in one of the city's many parks. The air is so clean and fresh, thanks to all the efforts to reduce pollution and protect the environment. I love looking up at the clear blue sky and feeling the warm sun on my face.After work, I usually meet up with some friends in a virtual hangout space. We can all put on our VR headsets and suddenly be together in a cool virtual environment, like a beach or a futuristic city. It's a great way to catch up and socialize without having to physically go anywhere.Sometimes, we'll even play virtual reality games together. There are so many amazing games these days, where you canfully immerse yourself in fantastical worlds and adventures. It's like being inside a movie or a book!On weekends, I like to go out and explore the real world too. I'll go for hikes in the nearby mountains, visit museums or art galleries, or just hang out at one of the cool new cafes or restaurants that are always popping up.One of my favorite things to do is visit my grandparents. They live in a really nice retirement community that has all sorts of amazing amenities and activities for seniors. I love hearing their stories about what life was like when they were kids, back in the early 2000s. It's hard to imagine a world without all the technology we have now!Speaking of technology, I should probably mention how much it's changed our lives. We have self-driving cars, so I don't even need to worry about driving myself places. We also have smart homes that can pretty much take care of themselves, from cleaning to cooking to keeping everything running smoothly.And of course, we have amazing medical technology that can cure diseases and even help people live longer, healthier lives. My grandparents are in their 90s, but they're still active and energetic thanks to all the advancements in healthcare.Overall, I'd say my life in 2050 is pretty amazing. I get to work with cutting-edge technology, explore virtual worlds, and still enjoy the beauty of the natural world around me. Of course, there are still challenges and problems to solve, but I feel like we're living in a really exciting time of progress and innovation.Who knows what the world will be like in another 30 or 40 years? Maybe by then, we'll have colonized other planets or figured out how to travel through time! For now, though, I'm just grateful to be alive in this incredible era and can't wait to see what the future holds.篇5My Life in 2050Hi there! My name is Alex, and I'm a sixth-grader at Greenwood Elementary School. Today, I'm going to tell you all about my life in the year 2050. It might sound like a long way off, but believe me, the future is closer than you think!Let me start by telling you about my family. My parents are both scientists working on developing new renewable energy sources. They're really passionate about their work and are always talking about how important it is to take care of our planet. Thanks to their efforts, by 2050, we've been able toreduce our carbon footprint significantly, and most of our energy comes from clean, sustainable sources like solar, wind, and hydrogen.My older sister, Emily, is studying to become a robotics engineer. She's always tinkering with gadgets and building cool stuff. Just last week, she showed me this little robot she made that can do all sorts of chores around the house – vacuuming, dusting, even folding laundry! Pretty neat, huh?As for me, I'm really interested in space exploration. Ever since I was a kid, I've been fascinated by the stars and planets. I even have a telescope in my room, and I love spending evenings gazing up at the night sky. By 2050, humans have already established a permanent settlement on Mars, and there are plans to explore even farther into the solar system. Who knows, maybe I'll be one of the first people to set foot on Jupiter's moons!Speaking of space, you should see the technology we have in 2050. Computers and smartphones are a thing of the past –now, we have these amazing holographic displays that project篇6My Life in 2050Hi there! My name is Emily, and I'm a 12-year-old student in the year 2050. You probably can't even imagine how different the world is now compared to when you were a kid. Let me tell you all about my life and what the future is like!First of all, school is nothing like it used to be. We don't have to go to a physical building anymore. Instead, we have virtual classrooms where we can learn from the comfort of our homes. Our lessons are taught by holographic teachers, and we use augmented reality to visualize and interact with the subject matter. It's like having a whole science lab or art studio right in our living rooms!One of the coolest things about school in 2050 is that we get to go on virtual field trips. Just last week, we visited ancient Rome and got to walk through the Colosseum as if we were really there. Our history teacher even let us reenact a gladiator fight (don't worry, it was just a simulation, and no one got hurt).Speaking of technology, pretty much everything is automated and powered by AI these days. We have robot assistants that help us with our chores and homework. They're really smart and can answer almost any question we have. Sometimes it's like having a super-advanced Google right in our homes.Transportation has also changed a lot. We don't really use cars anymore because they're bad for the environment. Instead, we have these cool flying pods that take us wherever we need to go. They're electric and run on renewable energy, so they don't pollute the air. Plus, they're self-driving, so we can just sit back and relax while the pod takes us to our destination.But it's not all about technology. We still have plenty of time for fun and recreation. My favorite place to hang out is the virtual reality park. You can strap on a headset and suddenly find yourself in a magical world filled with all sorts of adventures. One minute you're exploring a jungle, and the next you're soaring through the skies on a dragon's back. It's the best way to let your imagination run wild!Speaking of the planet, one of the biggest challenges we face in 2050 is climate change. The Earth has already warmed up quite a bit, and we're seeing more extreme weather events like hurricanes, droughts, and wildfires. Scientists and engineers are working hard to develop new technologies to reduce our carbon footprint and protect the environment.But it's not all doom and gloom. There are also a lot of amazing scientific breakthroughs happening in fields like medicine, space exploration, and renewable energy. Just last year,scientists discovered a cure for cancer, and they're getting closer to finding ways to reverse aging and extend human lifespan.As for me, I'm not sure what I want to be when I grow up yet. Maybe I'll be a scientist and help find solutions to the world's problems. Or maybe I'll be an artist and create mind-bending virtual reality experiences. Heck, I might even become an astronaut and explore other planets! The possibilities are endless in 2050.One thing's for sure, though – the future is going to be an exciting and unpredictable place. Who knows what kind of amazing technologies and discoveries we'll have by the time I'm an adult? All I know is that I can't wait to be a part of it.Well, that's a glimpse into my life in 2050. I hope you found it interesting and maybe even a little bit mind-blowing. If you could see the world through my eyes for just a day, I think you'd be amazed at how much things have changed. But don't worry, the future isn't as scary as it might seem. It's just full of endless possibilities and opportunities to make the world a better place.Anyway, I should probably get going. My robot assistant just reminded me that I have a virtual field trip to the moon in an hour. Catch you later!。

数字媒体的真面和负面影响英语作文

数字媒体的真面和负面影响英语作文全文共3篇示例，供读者参考篇1The True Face and Negative Impact of Digital MediaIn today's digital age, we are constantly bombarded with information from various digital media platforms such as social media, news websites, and entertainment apps. While digital media has revolutionized the way we communicate, access information, and entertain ourselves, it also brings about a myriad of negative impacts that can affect our mental and physical well-being. In this essay, we will delve into the true face of digital media and explore its negative effects on society.On the bright side, digital media has connected people from all corners of the world, making communication faster and more accessible. Social media platforms like Facebook, Twitter, and Instagram have allowed us to stay connected with friends and family, share our thoughts and experiences, and engage with a global audience. News websites and blogs provide us withup-to-date information on current events, allowing us to stay informed and educated about the world around us.Entertainment apps like Netflix and Spotify offer us a plethora of movies, TV shows, and music to enjoy at our fingertips.However, the constant exposure to digital media can also have detrimental effects on our mental health. Social media, in particular, has been linked to anxiety, depression, and poorself-esteem among users. The unrealistic beauty standards, curated lifestyles, and constant comparison on social media can lead to feelings of inadequacy and FOMO (fear of missing out). The addiction to scrolling through endless feeds and notifications can disrupt our sleep patterns, decrease our productivity, and negatively impact our relationships with others.Moreover, the spread of fake news and misinformation through digital media has become a major concern in today's society. As information can be easily manipulated and shared without verification, it is increasingly difficult to discern fact from fiction. This can lead to the spread of rumors, conspiracy theories, and propaganda that can have far-reaching consequences on public opinion, political discourse, and social stability. The rise of echo chambers and filter bubbles on social media further exacerbates the problem, as we are more likely to be exposed to information that aligns with our existing beliefs and biases.In addition, the constant exposure to screens and digital devices has been linked to several physical health issues. Prolonged use of smartphones, tablets, and computers can cause eye strain, headaches, and poor posture. The sedentary lifestyle associated with excessive screen time can also lead to obesity, cardiovascular diseases, and other chronic conditions. Furthermore, the blue light emitted from screens disrupts our circadian rhythm and can affect our sleep quality.In conclusion, while digital media has its advantages in terms of connectivity, information access, and entertainment, it also comes with a host of negative impacts on society. From mental health issues to fake news dissemination to physical health concerns, the pervasive nature of digital media has reshaped our lives in both positive and negative ways. It is crucial for individuals to be mindful of their digital consumption and to practice digital detoxes to maintain a healthy balance between the benefits and drawbacks of digital media. Only by understanding the true face of digital media and its negative impact can we strive to create a healthier and more informed society.篇2The True Face and Negative Impact of Digital MediaIn today's digital age, we are constantly bombarded with digital media in various forms such as social media, news websites, online videos, and mobile apps. While digital media has revolutionized the way we communicate, consume information, and entertain ourselves, it also comes with its fair share of negative impacts. In this article, we will explore the true face of digital media and delve into its negative effects on individuals and society.The True Face of Digital MediaDigital media, with its instant access to information and vast array of content, has become an integral part of our daily lives. We rely on digital media for news updates, social interactions, entertainment, and even shopping. Digital media has made it easier for us to connect with people from all around the world, stay informed about current events, and access a wide range of entertainment options.However, the true face of digital media goes beyond its convenience and accessibility. Digital media also plays a significant role in shaping our beliefs, attitudes, and behaviors. The algorithms used by social media platforms and search engines tailor content to our preferences, creating filter bubbles that reinforce our existing beliefs and opinions. This can lead toecho chambers where we are only exposed to information that confirms our biases, limiting our ability to consider alternative viewpoints.Furthermore, digital media has also been criticized for promoting unrealistic beauty standards, spreading fake news, and fueling online harassment and cyberbullying. Social media platforms often create a pressure to present a perfect and polished version of ourselves, leading to feelings of inadequacy and low self-esteem among users. The spread of fake news and misinformation on digital media has caused confusion and distrust among the public, making it difficult to discern fact from fiction. Finally, the anonymity and distance provided by digital media have emboldened individuals to engage in online harassment and cyberbullying, leading to negative psychological effects on victims.Negative Impact of Digital Media1. Information Overload: The constant stream of information from digital media can lead to information overload, making it difficult to filter out relevant and reliable information. This can lead to cognitive overload and decision fatigue, reducing our ability to focus and make informed decisions.2. Decreased Attention Span: The quick and easy access to digital media has shortened our attention spans and made us more prone to distractions. Constant notifications, pop-up ads, and autoplay videos can make it difficult to concentrate on tasks and stay focused for extended periods of time.3. Social Comparison and FOMO: Social media platforms often portray idealized versions of people's lives, leading to social comparison and feelings of inadequacy among users. The fear of missing out (FOMO) can compel individuals to constantly check their social media feeds, leading to anxiety and dissatisfaction with their own lives.4. Addiction and Dependency: The addictive nature of digital media, particularly social media and mobile apps, can lead to excessive use and dependency. The constant need for validation and approval from online interactions can result in compulsive and harmful behaviors.5. Privacy Concerns: The collection and use of personal data by digital media companies raise privacy concerns among users. The sharing of personal information and behavioral data can be exploited for targeted advertising, surveillance, and manipulation.6. Negative Mental Health Effects: Excessive use of digital media has been linked to negative mental health effects such as anxiety, depression, loneliness, and poor sleep quality. The pressure to present a perfect image online and the comparison with others can contribute to feelings of inadequacy and low self-esteem.ConclusionWhile digital media has brought about many positive changes in our lives, it also comes with its fair share of negative impacts. It is important for individuals to be aware of the true face of digital media and the potential harm it can cause. By being mindful of our online behaviors and setting boundaries for our digital consumption, we can minimize the negative effects of digital media and harness its benefits for our well-being and personal growth.篇3The True and Negative Impact of Digital MediaIntroductionIn this digital age, the influence of digital media has become increasingly prominent in our daily lives. Digital media refers to various forms of media that are electronic in nature, such associal media, websites, and online news platforms. While digital media has greatly enhanced communication and access to information, it also comes with both positive and negative consequences. In this essay, we will explore the true impact of digital media and its negative implications on individuals and society.The True Impact of Digital MediaDigital media has revolutionized the way we communicate and access information. Through social media platforms like Facebook, Twitter, and Instagram, individuals can connect with others from all around the world, fostering global communication and understanding. Additionally, digital media has made it easier for individuals to stay informed about current events and developments, as news is instantly accessible through online news platforms and websites. This easy access to information has empowered individuals to educate themselves on a wide range of topics and stay engaged in local and global issues.Furthermore, digital media has also played a pivotal role in fostering creativity and innovation. With the rise of platforms like YouTube and TikTok, individuals can showcase their talents and creativity to a global audience, opening up new opportunities forartists, musicians, and content creators. Digital media has democratized the creative industry, allowing individuals from diverse backgrounds to share their work and gain recognition.Moreover, digital media has transformed the way we consume entertainment. Streaming services like Netflix and Spotify have made it easier for individuals to access a wide range of movies, TV shows, and music at their convenience. This has led to a shift in the traditional entertainment industry, giving rise to new forms of storytelling and content creation.The Negative Impact of Digital MediaDespite the numerous benefits of digital media, it also comes with negative implications that can have a detrimental impact on individuals and society. One of the most concerning aspects of digital media is the spread of misinformation and fake news. With the rise of social media, false information can easily be circulated and shared, leading to confusion and distrust among the public. This misinformation can have serious consequences, such as promoting harmful conspiracy theories or inciting violence.Additionally, the pervasive presence of digital media in our lives has led to issues of addiction and mental health problems. With the constant stimulation and notifications from socialmedia and online platforms, individuals can become addicted to their devices, leading to a decrease in productivity and social interactions. Moreover, the unrealistic standards and ideals perpetuated by digital media can lead to feelings of inadequacy and low self-esteem among individuals, especially young people who are heavily influenced by social media influencers and celebrities.Furthermore, digital media has also raised concerns about privacy and security. With the vast amount of personal data being collected by online platforms, individuals are at risk of having their privacy compromised and their information misused. This has raised questions about the ethical implications of digital media and the need for stronger regulations to protect individuals' data and rights.ConclusionIn conclusion, digital media has both positive and negative implications that have reshaped the way we communicate, access information, and consume entertainment. While digital media has empowered individuals to connect with others, express their creativity, and stay informed, it also comes with challenges such as the spread of misinformation, addiction, and privacy concerns. It is essential for individuals to be aware of thetrue impact of digital media and to use it responsibly to harness its benefits while mitigating its negative consequences. By being mindful of how we engage with digital media, we can create a healthier and more informed society for generations to come.。

Quantum Computing for Computer Scientists

More informationQuantum Computing for Computer ScientistsThe multidisciplinaryﬁeld of quantum computing strives to exploit someof the uncanny aspects of quantum mechanics to expand our computa-tional horizons.Quantum Computing for Computer Scientists takes read-ers on a tour of this fascinating area of cutting-edge research.Writtenin an accessible yet rigorous fashion,this book employs ideas and tech-niques familiar to every student of computer science.The reader is notexpected to have any advanced mathematics or physics background.Af-ter presenting the necessary prerequisites,the material is organized tolook at different aspects of quantum computing from the speciﬁc stand-point of computer science.There are chapters on computer architecture,algorithms,programming languages,theoretical computer science,cryp-tography,information theory,and hardware.The text has step-by-stepexamples,more than two hundred exercises with solutions,and program-ming drills that bring the ideas of quantum computing alive for today’scomputer science students and researchers.Noson S.Yanofsky,PhD,is an Associate Professor in the Departmentof Computer and Information Science at Brooklyn College,City Univer-sity of New York and at the PhD Program in Computer Science at TheGraduate Center of CUNY.Mirco A.Mannucci,PhD,is the founder and CEO of HoloMathics,LLC,a research and development company with a focus on innovative mathe-matical modeling.He also serves as Adjunct Professor of Computer Sci-ence at George Mason University and the University of Maryland.QUANTUM COMPUTING FORCOMPUTER SCIENTISTSNoson S.YanofskyBrooklyn College,City University of New YorkandMirco A.MannucciHoloMathics,LLCMore informationMore informationcambridge university pressCambridge,New York,Melbourne,Madrid,Cape Town,Singapore,S˜ao Paulo,DelhiCambridge University Press32Avenue of the Americas,New York,NY10013-2473,USAInformation on this title:/9780521879965C Noson S.Yanofsky and Mirco A.Mannucci2008This publication is in copyright.Subject to statutory exceptionand to the provisions of relevant collective licensing agreements,no reproduction of any part may take place withoutthe written permission of Cambridge University Press.First published2008Printed in the United States of AmericaA catalog record for this publication is available from the British Library.Library of Congress Cataloging in Publication dataYanofsky,Noson S.,1967–Quantum computing for computer scientists/Noson S.Yanofsky andMirco A.Mannucci.p.cm.Includes bibliographical references and index.ISBN978-0-521-87996-5(hardback)1.Quantum computers.I.Mannucci,Mirco A.,1960–II.Title.QA76.889.Y352008004.1–dc222008020507ISBN978-0-521-879965hardbackCambridge University Press has no responsibility forthe persistence or accuracy of URLs for external orthird-party Internet Web sites referred to in this publicationand does not guarantee that any content on suchWeb sites is,or will remain,accurate or appropriate.More informationDedicated toMoishe and Sharon Yanofskyandto the memory ofLuigi and Antonietta MannucciWisdom is one thing:to know the tho u ght by which all things are directed thro u gh allthings.˜Heraclitu s of Ephe s u s(535–475B C E)a s quoted in Dio g ene s Laertiu s’sLives and Opinions of Eminent PhilosophersBook IX,1. More informationMore informationContentsPreface xi1Complex Numbers71.1Basic Deﬁnitions81.2The Algebra of Complex Numbers101.3The Geometry of Complex Numbers152Complex Vector Spaces292.1C n as the Primary Example302.2Deﬁnitions,Properties,and Examples342.3Basis and Dimension452.4Inner Products and Hilbert Spaces532.5Eigenvalues and Eigenvectors602.6Hermitian and Unitary Matrices622.7Tensor Product of Vector Spaces663The Leap from Classical to Quantum743.1Classical Deterministic Systems743.2Probabilistic Systems793.3Quantum Systems883.4Assembling Systems974Basic Quantum Theory1034.1Quantum States1034.2Observables1154.3Measuring1264.4Dynamics1294.5Assembling Quantum Systems1325Architecture1385.1Bits and Qubits138viiMore informationviii Contents5.2Classical Gates1445.3Reversible Gates1515.4Quantum Gates1586Algorithms1706.1Deutsch’s Algorithm1716.2The Deutsch–Jozsa Algorithm1796.3Simon’s Periodicity Algorithm1876.4Grover’s Search Algorithm1956.5Shor’s Factoring Algorithm2047Programming Languages2207.1Programming in a Quantum World2207.2Quantum Assembly Programming2217.3Toward Higher-Level Quantum Programming2307.4Quantum Computation Before Quantum Computers2378Theoretical Computer Science2398.1Deterministic and Nondeterministic Computations2398.2Probabilistic Computations2468.3Quantum Computations2519Cryptography2629.1Classical Cryptography2629.2Quantum Key Exchange I:The BB84Protocol2689.3Quantum Key Exchange II:The B92Protocol2739.4Quantum Key Exchange III:The EPR Protocol2759.5Quantum Teleportation27710Information Theory28410.1Classical Information and Shannon Entropy28410.2Quantum Information and von Neumann Entropy28810.3Classical and Quantum Data Compression29510.4Error-Correcting Codes30211Hardware30511.1Quantum Hardware:Goals and Challenges30611.2Implementing a Quantum Computer I:Ion Traps31111.3Implementing a Quantum Computer II:Linear Optics31311.4Implementing a Quantum Computer III:NMRand Superconductors31511.5Future of Quantum Ware316Appendix A Historical Bibliography of Quantum Computing319 by Jill CirasellaA.1Reading Scientiﬁc Articles319A.2Models of Computation320More informationContents ixA.3Quantum Gates321A.4Quantum Algorithms and Implementations321A.5Quantum Cryptography323A.6Quantum Information323A.7More Milestones?324Appendix B Answers to Selected Exercises325Appendix C Quantum Computing Experiments with MATLAB351C.1Playing with Matlab351C.2Complex Numbers and Matrices351C.3Quantum Computations354Appendix D Keeping Abreast of Quantum News:QuantumComputing on the Web and in the Literature357by Jill CirasellaD.1Keeping Abreast of Popular News357D.2Keeping Abreast of Scientiﬁc Literature358D.3The Best Way to Stay Abreast?359Appendix E Selected Topics for Student Presentations360E.1Complex Numbers361E.2Complex Vector Spaces362E.3The Leap from Classical to Quantum363E.4Basic Quantum Theory364E.5Architecture365E.6Algorithms366E.7Programming Languages368E.8Theoretical Computer Science369E.9Cryptography370E.10Information Theory370E.11Hardware371Bibliography373Index381More informationPrefaceQuantum computing is a fascinating newﬁeld at the intersection of computer sci-ence,mathematics,and physics,which strives to harness some of the uncanny as-pects of quantum mechanics to broaden our computational horizons.This bookpresents some of the most exciting and interesting topics in quantum computing.Along the way,there will be some amazing facts about the universe in which we liveand about the very notions of information and computation.The text you hold in your hands has a distinctﬂavor from most of the other cur-rently available books on quantum computing.First and foremost,we do not assumethat our reader has much of a mathematics or physics background.This book shouldbe readable by anyone who is in or beyond their second year in a computer scienceprogram.We have written this book speciﬁcally with computer scientists in mind,and tailored it accordingly:we assume a bare minimum of mathematical sophistica-tion,aﬁrst course in discrete structures,and a healthy level of curiosity.Because thistext was written speciﬁcally for computer people,in addition to the many exercisesthroughout the text,we added many programming drills.These are a hands-on,funway of learning the material presented and getting a real feel for the subject.The calculus-phobic reader will be happy to learn that derivatives and integrals are virtually absent from our text.Quite simply,we avoid differentiation,integra-tion,and all higher mathematics by carefully selecting only those topics that arecritical to a basic introduction to quantum computing.Because we are focusing onthe fundamentals of quantum computing,we can restrict ourselves to theﬁnite-dimensional mathematics that is required.This turns out to be not much more thanmanipulating vectors and matrices with complex entries.Surprisingly enough,thelion’s share of quantum computing can be done without the intricacies of advancedmathematics.Nevertheless,we hasten to stress that this is a technical textbook.We are not writing a popular science book,nor do we substitute hand waving for rigor or math-ematical precision.Most other texts in theﬁeld present a primer on quantum mechanics in all its glory.Many assume some knowledge of classical mechanics.We do not make theseassumptions.We only discuss what is needed for a basic understanding of quantumxiMore informationxii Prefacecomputing as aﬁeld of research in its own right,although we cite sources for learningmore about advanced topics.There are some who consider quantum computing to be solely within the do-main of physics.Others think of the subject as purely mathematical.We stress thecomputer science aspect of quantum computing.It is not our intention for this book to be the deﬁnitive treatment of quantum computing.There are a few topics that we do not even touch,and there are severalothers that we approach brieﬂy,not exhaustively.As of this writing,the bible ofquantum computing is Nielsen and Chuang’s magniﬁcent Quantum Computing andQuantum Information(2000).Their book contains almost everything known aboutquantum computing at the time of its publication.We would like to think of ourbook as a usefulﬁrst step that can prepare the reader for that text.FEATURESThis book is almost entirely self-contained.We do not demand that the reader comearmed with a large toolbox of skills.Even the subject of complex numbers,which istaught in high school,is given a fairly comprehensive review.The book contains many solved problems and easy-to-understand descriptions.We do not merely present the theory;rather,we explain it and go through severalexamples.The book also contains many exercises,which we strongly recommendthe serious reader should attempt to solve.There is no substitute for rolling up one’ssleeves and doing some work!We have also incorporated plenty of programming drills throughout our text.These are hands-on exercises that can be carried out on your laptop to gain a betterunderstanding of the concepts presented here(they are also a great way of hav-ing fun).We hasten to point out that we are entirely language-agnostic.The stu-dent should write the programs in the language that feels most comfortable.Weare also paradigm-agnostic.If declarative programming is your favorite method,gofor it.If object-oriented programming is your game,use that.The programmingdrills build on one another.Functions created in one programming drill will be usedand modiﬁed in later drills.Furthermore,in Appendix C,we show how to makelittle quantum computing emulators with MATLAB or how to use a ready-madeone.(Our choice of MATLAB was dictated by the fact that it makes very easy-to-build,quick-and-dirty prototypes,thanks to its vast amount of built-in mathematicaltools.)This text appears to be theﬁrst to handle quantum programming languages in a signiﬁcant way.Until now,there have been only research papers and a few surveyson the topic.Chapter7describes the basics of this expandingﬁeld:perhaps some ofour readers will be inspired to contribute to quantum programming!This book also contains several appendices that are important for further study:Appendix A takes readers on a tour of major papers in quantum computing.This bibliographical essay was written by Jill Cirasella,Computational SciencesSpecialist at the Brooklyn College Library.In addition to having a master’s de-gree in library and information science,Jill has a master’s degree in logic,forwhich she wrote a thesis on classical and quantum graph algorithms.This dualbackground uniquely qualiﬁes her to suggest and describe further readings.More informationPreface xiii Appendix B contains the answers to some of the exercises in the text.Othersolutions will also be found on the book’s Web page.We strongly urge studentsto do the exercises on their own and then check their answers against ours.Appendix C uses MATLAB,the popular mathematical environment and an es-tablished industry standard,to show how to carry out most of the mathematicaloperations described in this book.MATLAB has scores of routines for manip-ulating complex matrices:we brieﬂy review the most useful ones and show howthe reader can quickly perform a few quantum computing experiments with al-most no effort,using the freely available MATLAB quantum emulator Quack.Appendix D,also by Jill Cirasella,describes how to use online resources to keepup with developments in quantum computing.Quantum computing is a fast-movingﬁeld,and this appendix offers guidelines and tips forﬁnding relevantarticles and announcements.Appendix E is a list of possible topics for student presentations.We give briefdescriptions of different topics that a student might present before a class of hispeers.We also provide some hints about where to start looking for materials topresent.ORGANIZATIONThe book begins with two chapters of mathematical preliminaries.Chapter1con-tains the basics of complex numbers,and Chapter2deals with complex vectorspaces.Although much of Chapter1is currently taught in high school,we feel thata review is in order.Much of Chapter2will be known by students who have had acourse in linear algebra.We deliberately did not relegate these chapters to an ap-pendix at the end of the book because the mathematics is necessary to understandwhat is really going on.A reader who knows the material can safely skip theﬁrsttwo chapters.She might want to skim over these chapters and then return to themas a reference,using the index and the table of contents toﬁnd speciﬁc topics.Chapter3is a gentle introduction to some of the ideas that will be encountered throughout the rest of the ing simple models and simple matrix multipli-cation,we demonstrate some of the fundamental concepts of quantum mechanics,which are then formally developed in Chapter4.From there,Chapter5presentssome of the basic architecture of quantum computing.Here one willﬁnd the notionsof a qubit(a quantum generalization of a bit)and the quantum analog of logic gates.Once Chapter5is understood,readers can safely proceed to their choice of Chapters6through11.Each chapter takes its title from a typical course offered in acomputer science department.The chapters look at that subﬁeld of quantum com-puting from the perspective of the given course.These chapters are almost totallyindependent of one another.We urge the readers to study the particular chapterthat corresponds to their favorite course.Learn topics that you likeﬁrst.From thereproceed to other chapters.Figure0.1summarizes the dependencies of the chapters.One of the hardest topics tackled in this text is that of considering two quan-tum systems and combining them,or“entangled”quantum systems.This is donemathematically in Section2.7.It is further motivated in Section3.4and formallypresented in Section4.5.The reader might want to look at these sections together.xivPrefaceFigure 0.1.Chapter dependencies.There are many ways this book can be used as a text for a course.We urge instructors to ﬁnd their own way.May we humbly suggest the following three plans of action:(1)A class that provides some depth might involve the following:Go through Chapters 1,2,3,4,and 5.Armed with that background,study the entirety of Chapter 6(“Algorithms”)in depth.One can spend at least a third of a semester on that chapter.After wrestling a bit with quantum algorithms,the student will get a good feel for the entire enterprise.(2)If breadth is preferred,pick and choose one or two sections from each of the advanced chapters.Such a course might look like this:(1),2,3,4.1,4.4,5,6.1,7.1,9.1,10.1,10.2,and 11.This will permit the student to see the broad outline of quantum computing and then pursue his or her own path.(3)For a more advanced class (a class in which linear algebra and some mathe-matical sophistication is assumed),we recommend that students be told to read Chapters 1,2,and 3on their own.A nice course can then commence with Chapter 4and plow through most of the remainder of the book.If this is being used as a text in a classroom setting,we strongly recommend that the students make presentations.There are selected topics mentioned in Appendix E.There is no substitute for student participation!Although we have tried to include many topics in this text,inevitably some oth-ers had to be left out.Here are a few that we omitted because of space considera-tions:many of the more complicated proofs in Chapter 8,results about oracle computation,the details of the (quantum)Fourier transforms,and the latest hardware implementations.We give references for further study on these,as well as other subjects,throughout the text.More informationMore informationPreface xvANCILLARIESWe are going to maintain a Web page for the text at/∼noson/qctext.html/The Web page will containperiodic updates to the book,links to interesting books and articles on quantum computing,some answers to certain exercises not solved in Appendix B,anderrata.The reader is encouraged to send any and all corrections tonoson@Help us make this textbook better!ACKNOLWEDGMENTSBoth of us had the great privilege of writing our doctoral theses under the gentleguidance of the recently deceased Alex Heller.Professor Heller wrote the follow-ing1about his teacher Samuel“Sammy”Eilenberg and Sammy’s mathematics:As I perceived it,then,Sammy considered that the highest value in mathematicswas to be found,not in specious depth nor in the overcoming of overwhelmingdifﬁculty,but rather in providing the deﬁnitive clarity that would illuminate itsunderlying order.This never-ending struggle to bring out the underlying order of mathematical structures was always Professor Heller’s everlasting goal,and he did his best to passit on to his students.We have gained greatly from his clarity of vision and his viewof mathematics,but we also saw,embodied in a man,the classical and sober ideal ofcontemplative life at its very best.We both remain eternally grateful to him.While at the City University of New York,we also had the privilege of inter-acting with one of the world’s foremost logicians,Professor Rohit Parikh,a manwhose seminal contributions to theﬁeld are only matched by his enduring com-mitment to promote younger researchers’work.Besides opening fascinating vis-tas to us,Professor Parikh encouraged us more than once to follow new directionsof thought.His continued professional and personal guidance are greatly appre-ciated.We both received our Ph.D.’s from the Department of Mathematics in The Graduate Center of the City University of New York.We thank them for providingus with a warm and friendly environment in which to study and learn real mathemat-ics.Theﬁrst author also thanks the entire Brooklyn College family and,in partic-ular,the Computer and Information Science Department for being supportive andvery helpful in this endeavor.1See page1349of Bass et al.(1998).More informationxvi PrefaceSeveral faculty members of Brooklyn College and The Graduate Center were kind enough to read and comment on parts of this book:Michael Anshel,DavidArnow,Jill Cirasella,Dayton Clark,Eva Cogan,Jim Cox,Scott Dexter,EdgarFeldman,Fred Gardiner,Murray Gross,Chaya Gurwitz,Keith Harrow,JunHu,Yedidyah Langsam,Peter Lesser,Philipp Rothmaler,Chris Steinsvold,AlexSverdlov,Aaron Tenenbaum,Micha Tomkiewicz,Al Vasquez,Gerald Weiss,andPaula Whitlock.Their comments have made this a better text.Thank you all!We were fortunate to have had many students of Brooklyn College and The Graduate Center read and comment on earlier drafts:Shira Abraham,RachelAdler,Ali Assarpour,Aleksander Barkan,Sayeef Bazli,Cheuk Man Chan,WeiChen,Evgenia Dandurova,Phillip Dreizen,C.S.Fahie,Miriam Gutherc,RaveHarpaz,David Herzog,Alex Hoffnung,Matthew P.Johnson,Joel Kammet,SerdarKara,Karen Kletter,Janusz Kusyk,Tiziana Ligorio,Matt Meyer,James Ng,SeverinNgnosse,Eric Pacuit,Jason Schanker,Roman Shenderovsky,Aleksandr Shnayder-man,Rose B.Sigler,Shai Silver,Justin Stallard,Justin Tojeira,John Ma Sang Tsang,Sadia Zahoor,Mark Zelcer,and Xiaowen Zhang.We are indebted to them.Many other people looked over parts or all of the text:Scott Aaronson,Ste-fano Bettelli,Adam Brandenburger,Juan B.Climent,Anita Colvard,Leon Ehren-preis,Michael Greenebaum,Miriam Klein,Eli Kravits,Raphael Magarik,JohnMaiorana,Domenico Napoletani,Vaughan Pratt,Suri Raber,Peter Selinger,EvanSiegel,Thomas Tradler,and Jennifer Whitehead.Their criticism and helpful ideasare deeply appreciated.Thanks to Peter Rohde for creating and making available to everyone his MAT-LAB q-emulator Quack and also for letting us use it in our appendix.We had a gooddeal of fun playing with it,and we hope our readers will too.Besides writing two wonderful appendices,our friendly neighborhood librar-ian,Jill Cirasella,was always just an e-mail away with helpful advice and support.Thanks,Jill!A very special thanks goes to our editor at Cambridge University Press,HeatherBergman,for believing in our project right from the start,for guiding us through thisbook,and for providing endless support in all matters.This book would not existwithout her.Thanks,Heather!We had the good fortune to have a truly stellar editor check much of the text many times.Karen Kletter is a great friend and did a magniﬁcent job.We also ap-preciate that she refrained from killing us every time we handed her altered draftsthat she had previously edited.But,of course,all errors are our own!This book could not have been written without the help of my daughter,Hadas-sah.She added meaning,purpose,and joy.N.S.Y.My dear wife,Rose,and our two wondrous and tireless cats,Ursula and Buster, contributed in no small measure to melting my stress away during the long andpainful hours of writing and editing:to them my gratitude and love.(Ursula is ascientist cat and will read this book.Buster will just shred it with his powerful claws.)M.A.M.。

热点解读“DigitalTwin”到底是什么黑科技

热点解读“DigitalTwin”到底是什么黑科技本文选自《智慧企业之路》第二期“到2035年，当航空公司接收一架飞机的时候，将同时验收另外一套数字模型，它就像飞机的一个忠诚影子，伴随一生，从不消失” 。

——美国《航空周刊》Digital Twin本文称为“数字孪生”，也被称为“数字镜像”、“数字双胞胎”或“数字化映射”等，是以数字化方式为物理对象创建的虚拟模型，来模拟其在现实环境中的行为。

Digital Twin代表了物理世界与虚拟世界的融合，是2017年著名咨询公司Gartner 公司选出的影响未来十大战略关键技术趋势之一。

未来每一个工业产品从都有一个动态的数字化映像与其相伴相生，贯穿从产品设计、制造到部署、运营的完整生命周期，用户可以完整地审视每一个产品个体的设计、制造和运营过程中的数字化轨迹。

这个数字化映像实时收集产品运营数据，通过分析预测故障并提前报警，以提前安排并制订预防性维修计划，最大程度地降低产品运营的宕机率，甚至通过历史数据的积累和仿真分析，向工业产品的设计过程不断反馈运营中总结的产品需求并衍生出设计策略，形成产品的优化改进机制，不断提高产品的用户体验。

1Digital Twin的由来“孪生（Twin）”的概念最早可追溯到美国国家航空航天局NASA的阿波罗项目。

NASA同时制造了两个完全一样的空间飞行器，留在地球上的飞行器被称为“模拟器”或“孪生体”。

孪生体用来反映正在执行任务的空间飞行器的状态，通过在孪生体中进行仿真试验，从而辅助太空轨道上的航天员在紧急情况下做出最正确的决策。

从这个角度可以看出，孪生体实际上是通过仿真实时反映真实运行情况的样机或模型。

▲图1：阿波罗项目的地面模拟器（孪生体）数字化建模和仿真技术巨大发展使得数字环境下的“孪生体”构建成为可能，即在计算机的虚拟空间中构建出与物理孪生类似的数字化映像，通过对物体实体传感信号的接入，实现模拟的环境感知和模拟决策。

Digital Twin一词的起源可以回溯到2003年Michael Grieves教授在美国密歇根大学推动PLM中心建设的演讲材料。

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