免费的英文文献资料网站

免费的英文文献资料网站
免费的英文文献资料网站

有用的英文文献资料网站

1.Nova Southeastern University(高权限)

入口:https://www.360docs.net/doc/472954891.html,

ID:hpdlibrary PW:library

资源列表:

ACP Medicine (2006)

AHFS Drug Information? (2006)

Basic and Clinical Pharmacology - 9th Ed. (2004)

Current Diagnosis & Treatment in Orthopedics - 4th Ed. (2006)

Current Medical Diagnosis & Treatment - 45th Ed. (2006)

Current Obstetric & Gynecologic Diagnosis & Treatment - 9th Ed. (2003) Delmar's Fundamental & Advanced Nursing Skills - 2nd Ed. (2004) Geriatric Medicine: An Evidence Based Approach - 4th Ed. (2003) Griffith's 5-Minute Clinical Consult - 14th Ed. (2006)

Merck Manual - 17th Ed. (1999) Centennial Edition

Rudolph's Pediatrics - 21st Ed. (2003)

Schwartz's Principles of Surgery - 8th Ed. (2005)

Smith's General Urology - 16th Ed. (2004)

USP DI? Drug Info. for the Health Care Pro. - 26th Ed. (2006)

Williams Obstetrics - 22nd Ed. (2005)

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国外大学免费硕博全文数据库以及部分期刊全文

200){this.resized=true;this.style.width=200;}">

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Australian Digital Theses Program

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University of New Orleans

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University of Pretoria : Electronic Theses and Dissertations

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University of Puerto Rico Mayaguez Campus

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University of Texas - Austin

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University Utrecht(Electronic Theses and Dissertations)

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W Electronic Thesis Database

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Uppsala Universitiet

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Virginia Commonwealth University

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Worcester Polytechnic Institute

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Yale University Library

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The George Washington University

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he Pennsylvania State University's electronic Theses and Dissertations Archives https://www.360docs.net/doc/472954891.html,/ETD-db/ETD-search/search

North Carolina State University

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The New Jersey Institute of Technology's Electronic Theses & Dissertations https://www.360docs.net/doc/472954891.html,/etd/index.cfm

Naval Postgraduate School Theses

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ational Taiwan Normal University

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https://www.360docs.net/doc/472954891.html,/mrkshared/mmanual/section13/sec13.jsp 几个国外名校的开放资源

MIT的公开课件下载

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约翰霍普金斯公共卫生学院的开放式课件

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尤他州立大学https://www.360docs.net/doc/472954891.html,/Index/ECIndex_view

东京大学http://ocw.u-tokyo.ac.jp/english/

早稻田大学http://www.waseda.jp/ocw/index.html

东京理工学院http://www.ocw.titech.ac.jp/

大阪大学http://ocw.osaka-u.ac.jp/index.php

京都大学http://ocw.kyoto-u.ac.jp/en/

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一、中文数据库

1、清华同方学术期刊网

中国最大的数据库,内容较全。收录了5000多种中文期刊,1994年以来的数百万篇文章,并且目前正以每天数千篇的速度进行更新。阅读全文需在网站主页下载CAJ全文浏览器(3.7M)。

2、维谱全文数据库

文献收录1989年以来的全文。只是扫描质量有点差劲,1994年以后的数据不如CNKI全。阅读全文需下载维谱全文浏览器,约7M。

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3、万方数据库

收录了核心期刊的全文,文件为pdf格式,阅读全文需Acrobat Reader 浏览器。

二、外文全文站点(所有外文数据库,阅读全文均需要Acrobat Reader):

1、Annual Reviews https://www.360docs.net/doc/472954891.html,

该数据库收录各学科的综述性文章按SCI影响因子极高。

2、BiomedNet https://www.360docs.net/doc/472954891.html, 即BMN

世界上著名医学、生命科学数据库。

3、Blackwell-syn https://www.360docs.net/doc/472954891.html,/

该数据库包括Plant J. Plant Molecular Biotechnology等影响因子较高的期刊

4、Carctword https://www.360docs.net/doc/472954891.html,/

一个综合性数据库

5、EBSCO https://www.360docs.net/doc/472954891.html,

EBSCO公司是专门经营纸本期刊、电子期刊发行和电子文献数据库出版发行业务的集团公司。其数据库是一个大型综合数据库,其中的学术研究精粹数据库(Academic Search Elit)包括生物科学、工商经济、咨询科技、通讯传播、工程、教育、艺术、医药学等领域的1,700余种全文期刊,该数据库每天更新。Academic Search Premier 包括3,400余种科技期刊。

6、ECO https://www.360docs.net/doc/472954891.html,/oclcpsp/oclclogin.jsp

即OCLC或First Search也是一个综合性较强的数据库,大部分文章都有全文。

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荷兰Kluwer Academic Publisher是具有国际性声誉的学术出版商,它出版的图书、期刊一向品质较高,备受专家和学者的信赖和赞誉。Kluwer Online是Kluwer出版的750余种期刊的网络版,专门基于互联网提供Kluwer电子期刊的查询、阅览服务。

OVID Kluwer https://www.360docs.net/doc/472954891.html,.br/kluwer

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综合性数据库有medline等

14、Oxford Reference http://www.oxfordreference.

15、Oxford Press http://www.oup.co牛津大学出版社出版的150多种期刊

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Sciencedirect 是由荷兰Elsevier Science建立的全文检索数据库,包括原来的Idealibrary 在内的期刊总计1500多种。

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德国著名出版社Springer提供的数据库,包括该出版社出版的430余种期刊的全文。

18、UMI https://www.360docs.net/doc/472954891.html,/pqdweb

商业数据库

免费外文期刊——免费外文期刊一网打尽免费外文期刊——免费外文期刊一网打尽

1 https://www.360docs.net/doc/472954891.html, 斯坦福大学图书馆的分支机构——斯坦福出版社(Stanford Press),拥有最大的免费期刊数据库,可以在线提供916种免费期刊和1,149,216篇全文(至2005年)。

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单片机-英文参考文献

Structure and function of the MCS-51series Structure and function of the MCS-51series one-chip computer MCS-51is a name of a piece of one-chip computer series which Intel Company produces.This company introduced8top-grade one-chip computers of MCS-51series in1980after introducing8one-chip computers of MCS-48series in1976.It belong to a lot of kinds this line of one-chip computer the chips have,such as8051,8031,8751, 80C51BH,80C31BH,etc.,their basic composition,basic performance and instruction system are all the same.8051daily representatives-51serial one-chip computers. An one-chip computer system is made up of several following parts:(1)One microprocessor of8(CPU).(2)At slice data memory RAM(128B/256B),it use not depositting not can reading/data that write,such as result not middle of operation, final result and data wanted to show,etc.(3)Procedure memory ROM/EPROM (4KB/8KB),is used to preserve the procedure,some initial data and form in slice. But does not take ROM/EPROM within some one-chip computers,such as8031, 8032,80C,etc..(4)Four8run side by side I/O interface P0four P3,each mouth can use as introduction,may use as exporting too.(5)Two timer/counter,each timer/ counter may set up and count in the way,used to count to the external incident,can set up into a timing way too,and can according to count or result of timing realize the control of the computer.(6)Five cut off cutting off the control system of the source. (7)One all duplexing serial I/O mouth of UART(universal asynchronous receiver/transmitter(UART)),is it realize one-chip computer or one-chip computer and serial communication of computer to use for.(8)Stretch oscillator and clock produce circuit,quartz crystal finely tune electric capacity need outer.Allow oscillation frequency as12megahertas now at most.Every the above-mentioned part was joined through the inside data bus.Among them,CPU is a core of the one-chip computer,it is the control of the computer and command centre,made up of such parts as arithmetic unit and controller,etc..The arithmetic unit can carry on8persons of arithmetic operation and unit ALU of logic operation while including one,the1 storing device temporarilies of8,storing device2temporarily,8's accumulation

步进电机及单片机英文文献及翻译

外文文献: Knowledge of the stepper motor What is a stepper motor: Stepper motor is a kind of electrical pulses into angular displacement of the implementing agency. Popular little lesson: When the driver receives a step pulse signal, it will drive a stepper motor to set the direction of rotation at a fixed angle (and the step angle). You can control the number of pulses to control the angular displacement, so as to achieve accurate positioning purposes; the same time you can control the pulse frequency to control the motor rotation speed and acceleration, to achieve speed control purposes. What kinds of stepper motor sub-: In three stepper motors: permanent magnet (PM), reactive (VR) and hybrid (HB) permanent magnet stepper usually two-phase, torque, and smaller, step angle of 7.5 degrees or the general 15 degrees; reaction step is generally three-phase, can achieve high torque output, step angle of 1.5 degrees is generally, but the noise and vibration are large. 80 countries in Europe and America have been eliminated; hybrid stepper is a mix of permanent magnet and reactive advantages. It consists of two phases and the five-phase: two-phase step angle of 1.8 degrees while the general five-phase step angle of 0.72 degrees generally. The most widely used Stepper Motor. What is to keep the torque (HOLDING TORQUE) How much precision stepper motor? Whether the cumulative: The general accuracy of the stepper motor step angle of 3-5%, and not cumulative.

at89c52单片机中英文资料对照外文翻译文献综述

at89c52单片机简介 中英文资料对照外文翻译文献综述 A T89C52 Single-chip microprocessor introduction Selection of Single-chip microprocessor 1. Development of Single-chip microprocessor The main component part of Single-chip microprocessor as a result of by such centralize to be living to obtain on the chip,In immediate future middle processor CPU。Storage RAM immediately﹑memoy read ROM﹑Interrupt system、Timer /'s counter along with I/O's rim electric circuit awaits the main microcomputer section,The lumping is living on the chip。Although the Single-chip microprocessor r is only a chip,Yet through makes up and the meritorous service be able to on sees,It had haveed the calculating machine system property,calling it for this reason act as Single-chip microprocessor r minisize calculating machine SCMS and abbreviate the Single-chip microprocessor。 1976Year the Inter corporation put out 8 MCS-48Set Single-chip microprocessor computer,After being living more than 20 years time in development that obtain continuously and wide-ranging application。1980Year that corporation put out high performance MCS -51Set Single-chip microprocessor。This type of Single-chip microprocessor meritorous service capacity、The addressing range wholly than early phase lift somewhat,Use also comparatively far more at the moment。1982Year that corporation put out the taller 16 Single-chip microprocessor MCS of performance once

MCS_51系列单片机中英文资料对照外文翻译文献综述

MCS-51系列单片机 中英文资料对照外文翻译文献综述 Structure and function of the MCS-51 series Structure and function of the MCS-51 series one-chip computer MCS-51 is a name of a piece of one-chip computer series which Intel Company produces. This company introduced 8 top-grade one-chip computers of MCS-51 series in 1980 after introducing 8 one-chip computers of MCS-48 series in 1976. It belong to a lot of kinds this line of one-chip computer the chips have, such as 8051, 8031, 8751, 80C51BH, 80C31BH,etc., their basic composition, basic performance and instruction system are all the same.8051 daily representatives-51 serial one-chip computers. A one-chip computer system is made up of several following parts: (1) One microprocessor of 8 (CPU). ( 2) At slice data memory RAM (128B/256B),it use not depositing not can reading /data that write, such as result not middle of operation, final result and data wanted to show, etc. (3) Procedure memory ROM/EPROM (4KB/8K B ), is used to preserve the

关于51单片机英文文献的英文翻译

利用单片机的定时器 6.1 前言 这一章包含一个描述的定时器系统微控制器,包括通用定时器,该定时器,和看门狗。 6.2 总体结构和功能,计时器系统 时间是必不可少的操作微控制器系统,可以生成信号的精确确定的期限,或外部事件计数。这原因,定时器子系统,是目前所有的微控制器的实现,和涵盖的范围广泛的功能包括: ?生成精确的时间间隔 ?测量时间的外部事件 ?计数外部事件。 多数微控制器提供专用定时器,或使用通用计时器实现以下功能: ?实时时钟 ?产生的脉冲宽度调制(脉宽调制)信号 ?看门狗检测程序失控情况。 虽然有很大的差异在不同的实现通用定时器在不同的微控制器,有许多相似在操作的原则和结构的定时器子系统。 图6.1显示了一个定时器系统总体框图,说明原则实施最单片机定时器。核心要素的定时器子系统是一个计数器,tcnt(8或16位在长度),这可能是读或写的软件(有时)。时钟tcnt 得到从系统时钟,除以一个可编程分频器,或外部时钟应用到一个单片机引脚。软件控制的计时器68使用6单片机定时器。

采用控制寄存器晶体管和信息方面的各种事件相关的计时器,可以读取状态寄存器tflg。几种工作模式是可能的计时器: 定时器溢出。在这种模式下,如果感兴趣的是当tcnt计数器达到它的最大数量和返回到零在下一个时钟脉冲。溢出信号这标志着这一事件是应用于中断控制逻辑(Ⅱ),这可能产生一个中断请求处理器。之间的时间间隔连续溢出控制通过修改输入时钟频率应用到tcnt,或以书面tcnt 一初始值的计算。 ?输入捕获。在这种经营模式,内容tcnt此刻的发生外部事件,定义边缘的一个输入信号,转移在捕获寄存器(民事),和一个中断请求可能会生成。由比较连续值捕获率,有可能确定之间的时间间隔的外部事件。 ?输出比较。在这种经营模式,内容tcnt不断比较了硬件的内容的光学字符识别(比较寄存器的输出)指数字比较器的比较。当一个寄存器的内容比赛中,一个中断请求可能会生成。或者,可以比较匹配通过编程改变现状的一个或多个输出线。 ?外部事件计数器。在这种经营模式,输入tcnt连接一个单片机输入线,和tcnt计数脉冲与外部事件。该软件是了解记录一些外部通过阅读tcnt事件。 6.3 特点鲜明的通用定时器HC 11 16位tcnt计数器HC 11可以依靠内部时钟,只有向上的。它可以读取软件,但不能被清除或书面。分频器是一个可编程的4位计数器,它将系统时钟的1,4,8,或16。有四个16位输出比较寄存器(光学字符识别),称为toc1,toc2,toc3,和toc4,三输入捕获寄存器(民事),称为tic1,tic2,和tic3,和一个额外的寄存器,可通过软件配置为五分之一 光学字符识别寄存器,笔名TOC五,或作为四分之一个输入捕获寄存器tic4。各种定时器功能相关的输入/输出线端口,如图所示在表6.1。 表6.1 替代功能的输入/输出线端口 1控制和状态寄存器的HC 11定时器虽然反tcnt,和分频器是独一无二的,在场的八民事/光学字符识别寄存器,各有不同的状态标志,相关的输入/输出线,随着可能产生不同的中断请求,

(完整word版)单片机外文文献翻译

中文资料原文 单片机 单片机也被称为微控制器(Microcontroller Unit),常用英文字母的缩写MCU表示单片机,它最早是被用在工业控制领域。单片机由芯片内仅有CPU的专用处理器发展而来。最早的设计理念是通过将大量外围设备和CPU集成在一个芯片中,使计算机系统更小,更容易集成进复杂的而对体积要求严格的控制设备当中。INTEL的Z80是最早按照这种思想设计出的处理器,从此以后,单片机和专用处理器的发展便分道扬镳。 早期的单片机都是8位或4位的。其中最成功的是INTEL的8031,因为简单可靠而性能不错获得了很大的好评。此后在8031上发展出了MCS51系列单片机系统。基于这一系统的单片机系统直到现在还在广泛使用。随着工业控制领域要求的提高,开始出现了16位单片机,但因为性价比不理想并未得到很广泛的应用。90年代后随着消费电子产品大发展,单片机技术得到了巨大提高。随着INTEL i960系列特别是后来的ARM系列的广泛应用,32位单片机迅速取代16位单片机的高端地位,并且进入主流市场。而传统的8位单片机的性能也得到了飞速提高,处理能力比起80年代提高了数百倍。目前,高端的32位单片机主频已经超过300MHz,性能直追90年代中期的专用处理器,而普通的型号出厂价格跌落至1美元,最高端[1]的型号也只有10美元。当代单片机系统已经不再只在裸机环境下开发和使用,大量专用的嵌入式操作系统被广泛应用在全系列的单片机上。而在作为掌上电脑和手机核心处理的高端单片机甚至可以直接使用专用的Windows和Linux操作系统。 单片机比专用处理器更适合应用于嵌入式系统,因此它得到了最多的应用。事实上单片机是世界上数量最多的计算机。现代人类生活中所用的几乎每件电子和机械产品中都会集成有单片机。手机、电话、计算器、家用电器、电子玩具、掌上电脑以及鼠标等电脑配件中都配有1-2部单片机。而个人电脑中也会有为数不少的单片机在工作。汽车上一般配备40多部单片机,复杂的工业控制系统上甚至可能有数百台单片机在同时工作!单片机的数量不仅远超过PC机和其他计算的总和,甚至比人类的数量还要多。 单片机又称单片微控制器,它不是完成某一个逻辑功能的芯片,而是把一个计算机系统集成到一个芯片上。相当于一个微型的计算机,和计算机相比,单片机只缺少了I/O设备。概括的讲:一块芯片就成了一台计算机。它的体积小、质量轻、价格便宜、为学习、应用和开发提供了便利条件。同时,学习使用单片机是了解计算机原理与结构的最佳选择。

(完整版)_毕业设计外文参考文献

[1] 王起江,洪杰.超超临界电站锅炉用新型管材的研制[J].宝钢技术, 2008(5):44-53. [2] 王起江,邹凤鸣.T91高压锅炉管的研制与应用[J].发电设备,2005 (1):43-47. [3] Fujio Abe.Bainitic and martensitic creep-resistant steels[J].Solid State and Materials Science,2004,8:. [4] 马明编译.美国新的超临界机组考虑使用TP92的原因[J].电力建设, 2006,27(11):79-80. [5] 戴平.国产P91钢管道存在的问题及其解决[J].广东电力,2008,21(8): 67-69. [6] 田党.关于难变形钢和合金管坯的二辊斜轧穿孔问题[J].钢铁,1998, 33(1):33-36. [7] P J Ennis,A Czyrska-Filemonowicz.Recent advances in creep-resistant steels for power plant applications [J].Sādhanā,2003,28:709–730. [8] 刘立民,朱洪,刘志国.法国T91、P91钢管性能评定[J].电站系统 工程,2002,18(1):63-64. [9] 彭孙鸿.T91钢管在我国的应用前景[J].宝钢技术,1997,6:48-50. [10] H.C. Furtado,L.H. de Almeida,I. Le May.Precipitation in 9Cr–1Mo steel after creep deformation[J].Materials Characterization,2007,58:72–77. [11] 蒯春光,彭志方.TP91钢在℃区间各相元素的分配特征及相稳定性 [J].金属学报,2008,44(8):. [12] 孙智,董小文,张绪平,等.奥氏体化温度对9Cr-1Mo-V-Nb钢组织 与性能的影响[J].金属热处理,2001,26(8):12-14.

AT89C51单片机英文文献附带翻译

AT89C51的概况 一 AT89C51应用 单片机广泛应用于商业:诸如调制解调器,电动机控制系统,空调控制系统,汽车发动机和其他一些领域。这些单片机的高速处理速度和增强型外围设备集合使得它们适合于这种高速事件应用场合。然而,这些关键应用领域也要求这些单片机高度可靠。健壮的测试环境和用于验证这些无论在元部件层次还是系统级别的单片机的合适的工具环境保证了高可靠性和低市场风险。Intel 平台工程部门开发了一种面向对象的用于验证它的AT89C51 汽车单片机多线性测试环境。这种环境的目标不仅是为AT89C51 汽车单片机提供一种健壮测试环境,而且开发一种能够容易扩展并重复用来验证其他几种将来的单片机。开发的这种环境连接了AT89C51。本文讨论了这种测试环境的设计和原理,它的和各种硬件、软件环境部件的交互性,以及如何使用AT89C51。 1.1 介绍 8 位AT89C51 CHMOS 工艺单片机被设计用于处理高速计算和快速输入/输出。MCS51 单片机典型的应用是高速事件控制系统。商业应用包括调制解调器,电动机控制系统,打印机,影印机,空调控制系统,磁盘驱动器和医疗设备。汽车工业把MCS51 单片机用于发动机控制系统,悬挂系统和反锁制动系统。AT89C51 尤其很好适用于得益于它的处理速度和增强型片上外围功能集,诸如:汽车动力控制,车辆动态悬挂,反锁制动和稳定性控制应用。由于这些决定性应用,市场需要一种可靠的具有低干扰潜伏响应的费用-效能控制器,服务大量时间和事件驱动的在实时应用需要的集成外围的能力,具有在单一程序包中高出平均处理功率的中央处理器。拥有操作不可预测的设备的经济和法律风险是很高的。一旦进入市场,尤其任务决定性应用诸如自动驾驶仪或反锁制动系统,错误将是财力上所禁止的。重新设计的费用可以高达500K 美元,如果产品族享有同样内核或外围设计缺陷的话,费用会更高。另外,部件的替代品领域是极其昂贵的,因为设备要用来把模块典型地焊接成一个总体的价值比各个部件高几倍。为了缓和这些问题,在最坏的环境和电压条件下对这些单片机进行无论在部件级别还是系统级别上的综合测试是必需的。Intel Chandler 平台工程组提供了各种单片机和处理器的系统验证。这种系统的验证处理可以被分解为三个主要部分。系统的类型和应用需求决定了能够在设备上执行的测试类型。 1.2 AT89C51提供以下标准功能:

基于单片机的温湿度控制系统英文文献

基于单片机的温湿度控制系统英文文 献

英文文献翻译 学 生 姓名 刘学毅 专 业 自动化 学 号 0833141 分 院 电子工程分院 6 月

1. 外文原文 A: Fundamentals of Single-chip Microcomputer The single-chip microcomputer is the culmination of both the development of the digital computer and the integrated circuit arguably the tow most significant inventions of the 20th century These tow types of architecture are found in single-chip microcomputer. Some employ the split program/data memory of the Harvard arch itecture, others follow the philosophy, widely adapted for general-purpose computers and microprocessors, of making no logical distinction between program and data memory as in the Princeton architecture, shown in F ig.3-5A-2. In general terms a single-chip microcomputer is characterized by the incorporation of all the units of a computer into a single device. Read only memory (ROM) ROM is usually for the permanent, non-volatile storage of an applications program .Many microcomputers and microcontrollers a re intended for high-volume applications and hence the economical manufacture of

单片机的外文文献及中文翻译

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51单片机外文文献

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单片机外文文献翻译

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单片机英文文献

Intelligent Traffic Control System Design Based on Single Chip Microcomputer Xu Lei, Ye Sheng, Lu Guilin, and Zhang Zhen School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou(221008), Jiangsu, China xukeixulei@https://www.360docs.net/doc/472954891.html, Abstract. This paper mainly introduces microcontroller of counter to implement an intelligent traffic control system. The system uses an external triggered pulses to simulate, through traffic to timing/counter car collection, so as to realize the flow of traffic information digitization. Meanwhile, according to historical stored data and automatic detection to car traffic information, microcontroller will be compared, and the control model algorithm control scheme by setting proper signal ratio, realizing the intelligent control traffic signals. Keywords: microcontroller, intelligent control system, timing ? counters. 1 Introduction Urban traffic control system is mainly used in city traffic data monitoring, traffic light control and traffic persuation computer integrated management system, it has become the most important part of the modern urban traffic control command system. Therefore, each intersection installation traffic lights has become the most relieves traffic vehicles and pedestrians most common and most effective management means, and how to use advanced information technology transform urban traffic system has become the consensus of urban traffic management. 2 System Compisition The traffic light control system is used to receive, processing intersection traffic data system, and according to the traffic flow conditions to be intelligent to adjust the traffic lights light destroy time length. The purpose of the design of the control system has two main function: Firstly ,finishing crossing the east-west and south-north two directions of traffic flow detection based on experimental data, so as to provide data modeling method; Secondly, by using the control system for intelligent control of traffic lights. Considering the actual feasibility, this system uses LED to replace the actual traffic lights, and the traffic flow with external input data is simulated the pulses. From the function can be mainly the whole control system points of traffic flow control module, inspection module and traffic light control module. The traffic lights control system of general function structure is as shown in figure 1.

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