chapter1 About ACT p1-22(1)
直升机飞行力学chapter1
Requirements
• Stressing on the physical meanings and basic concepts • Understanding and gripping the analysis methods • Being able to conduct the basic Calculation
Definition of Helicopter Flight Dynamics
The subject of studying external forces applied on helicopter as well as motions and controls
External Forces: Only those changing flight path such as aerodynamic, inertial and gravity forces. Motions: Accelerations(angular acceleration), velocities and position Controls: Pilot controls from cockpit, augment stability and control Flight qualities: Specification and flight quality assessment
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Rotor disc tilt side
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Characteristics of Helicopter Flight
1. There are 6 freedoms of motion in space, But there are only 4 controls. Therefore the control for each freedom of motion is not independent. The response of helicopter to controls is coupled. The crosscoupling between axes is serious and needs to be removed by pilot controls or SCAS. The controls for heaving, pitch and roll motions are implemented by blade flapping motion. Thus the delay of helicopter response to pilot controls is greater than that of fixed-wing aircraft. The flight qualities of helicopter is poorer than that of fixed-wing aircraft The flight dynamics of helicopter is more complicated than fixedwing aircraft
小王子英文版每一章的主要内容
小王子英文版每一章的主要内容全文共四篇示例，供读者参考第一篇示例：Chapter 1: The narrator introduces himself as a pilot who crash-lands in the Sahara desert and meets the Little Prince. The Little Prince asks the narrator to draw him a sheep, which leads to a conversation about the importance of imagination.第二篇示例：Chapter 1: The narrator meets the Little Prince in the desert and learns of his origins on a small asteroid called B-612. The Little Prince tells the narrator about his travels and the unique encounters he has had with different inhabitants of the planets he has visited.第三篇示例：Chapter 3: The Little Prince describes his home planet, Asteroid B-612, and the baobab trees that threaten to take over the planet. He also talks about the rose he left behind on his planet, which he loves deeply.第四篇示例：Chapter 2: The little prince recounts his journey from planet to planet, meeting various strange and colorful characters along the way. He learns valuable lessons about love, loss, and loneliness as he encounters the inhabitants of each world.。
Coding and Information theory-chapter1
“A Mathematical Theory of Communication” (1948).
"I just wondered how things were put together."
2
Shannon joined AT&T Bell Telephones in New Jersey in 1941 as a research mathematician and remained at the Bell Laboratories until 1972. Johnson writes in [4] that Shannon:... became known for keeping to himself by day and riding his unicycle down the halls at night. D Slepian, a colleague at the Bell Laboratories wrote:Many of us brought our lunches to work and played mathematical blackboard games but Claude rarely came. He worked with his door closed, mostly. But if you went in, he would be very patient and help you along. He could grasp a problem in zero time. He really was quite a genius. He's the only person I know whom I'd apply that word to. Marvin Minsky described Shannon as follows:Whatever came up, he engaged it with joy, and he attacked it with some surprising resource which might be some new kind of technical concept or a hammer and saw with some scraps of wood. For him, the harder a problem might seem, the better the chance to find something new.
完整英文版《第二性》The-Second-Sex
完整英文版《第二性》The-Second-SexThe Second Sexby Simone de Beauvoir (1949)Book One: Facts and Myths, Part I: DestinyChapter 1, The Data of BiologyWOMAN? Very simple, say the fanciers of simple formulas: she is a womb, an ovary; she is a female –this word is sufficient to define her. In the mouth of a man the epithet female has the sound of an insult, yet he is not ashamed of his animal nature; on the contrary, he is proud if someone says of him: ‘He is a male!’ The term ‘female’ is derogatory not because it emphasises woman’s ani mality, but because it imprisons her in her sex; and if this sex seems to man to be contemptible and inimical even in harmless dumb animals, it is evidently because of the uneasy hostility stirred up in him by woman. Nevertheless he wishes to find in biology a justification for this sentiment. The word female brings up in his mind a saraband of imagery –a vast, round ovum engulfs and castrates the agile spermatozoan; the monstrous and swollen termite queen rules over the enslaved males; the female praying mantis and the spider, satiated with love, crush and devour their partners; the bitch in heat runs through the alleys, trailing behind her a wake of depraved odours; the she-monkey presents posterior immodestly and then steals away with hypocritical coquetry; and the most superb wild beasts –the tigress, the lioness, the panther – bed down slavishly under the imperial embrace of the male. Females sluggish, eager, artful, stupid, callous, lustful, ferocious, abased – man projects them all at once upon woman. And the fact is that she is a female. But if we are willing to stop thinking in platitudes, two questions areimmediately posed: what does the female denote in the animal kingdom? And what particular kind of female is manifest in woman?Males and females are two types of individuals which are differentiated within a species for the function of reproduction; they can be defined only correlatively. But first it must be noted that even the division of a species into two sexes is not always clear-cut.In nature it is not universally manifested. To speak only of animals, it is well known that among the microscopic one-celled forms –infusoria, amoebae, sporozoans, and the like –multiplication is fundamentally distinct from sexuality. Each cell divides and subdivides by itself. In many-celled animals or metazoans reproduction may take place asexually, either by schizogenesis –that is, by fission or cutting into two or more parts which become new individuals – or by blastogenesis – that is, by buds that separate and form new individuals. The phenomena of budding observed in the fresh-water hydra and other coelenterates, in sponges, worms, and tunicates, are well-known examples. In cases of parthenogenesis the egg of the virgin female develops into an embryo without fertilisation by the male, which thus may play no role at all. In the honey-bee copulation takes place, but the eggs may or may not be fertilised at the time of laying. The unfertilised eggs undergo development and produce the drones (males); in the aphids males are absent during a series of generations in which the eggs are unfertilised and produce females. Parthenogenesis has been induced artificially in the sea urchin, the starfish, the frog, and other species. Among the one-celled animals (Protozoa), however, two cells may fuse, forming whatis called a zygote; and in the honey-bee fertilisation is necessary if the eggs are to produce females. In the aphids both males and females appear in the autumn, and the fertilised eggs then produced are adapted for over-wintering.Certain biologists in the past concluded from these facts that even in species capable of asexual propagation occasional fertilisation is necessary to renew the vigour of the race –to accomplish ‘rejuvenation’ through the mixing of her editary material from two individuals. On this hypothesis sexuality might well appear to be an indispensable function in the most complex forms of life; only the lower organisms could multiply without sexuality, and even here vitality would after a time become exhausted. But today this hypothesis is largely abandoned; research has proved that under suitable conditions asexual multiplication can go on indefinitely without noticeable degeneration, a fact that is especially striking in the bacteria and Protozoa. More and more numerous and daring experiments in parthenogenesis are being performed, and in many species the male appears to be fundamentally unnecessary. Besides, if the value of intercellular exchange were demonstrated, that value would seem to stand as a sheer, unexplained fact. Biology certainly demonstrates the existence of sexual differentiation, but from the point of view of any end to be attained the science could not infer such differentiation from the structure of the cell, nor from the laws of cellular multiplication, nor from any basic phenomenon.The production of two types of gametes, the sperm and the egg, does not necessarily imply the existence of two distinct sexes; as a matter of fact, egg and sperm –two highly differentiated types of reproductive cells –may both beproduced by the same individual. This occurs in normally hermaphroditic species, which are common among plants and are also to be found among the lower animals, such as annelid worms and molluscs. In them reproduction may be accomplished through self-fertilisation or, more commonly, cross-fertilisation. Here again certain biologists have attempted to account for the existing state of affairs. Some hold that the separation of the gonads (ovaries and testes) in two distinct individuals represents an evolutionary advance over hermaphroditism; others on the contrary regard the separate condition as primitive, and believe that hermaphroditism represents a degenerate state. These notions regarding the superiority of one system or the other imply the most debatable evolutionary theorising. All that we can say for sure is that these two modes of reproduction coexist in nature, that they both succeed in accomplishing the survival of the species concerned, and that the differentiation of the gametes, like that of the organisms producing them, appears to be accidental. It would seem, then, that the division of a species into male and female individuals is simply an irreducible fact of observation.In most philosophies this fact has been taken for granted without pretence of explanation. According to the Platonic myth, there were at the beginning men, women, and hermaphrodites. Each individual had two faces, four arms, four legs, and two conjoined bodies. At a certain time they were split in two, and ever since each half seeks to rejoin its corresponding half. Later the gods decreed that new human beings should be created through the coupling of dissimilar halves. But it is only love that this story is intended to explain; division into sexes is assumed at the outset. Nor does。
chapter1_参考答案
1.计算机存储数据的基本单位是（）A.bitB.ByteC.字D.字符2.多年来，人们习惯于以计算机主机所使用的主要元器件的发展进行分代，所谓第四代计算机使用的主要元器件是（）A.电子管B.晶体管C.中小规模集成电路D.大规模和超大规模集成电路3.在计算机的不同发展阶段，操作系统最先出现在（）A.第一代计算机B.第二代计算机C.第三代计算机D.第四代计算机4.运算器的主要功能是进行（）A．只做加法B．逻辑运算C．算术运算和逻辑运算D．算术运算5.计算机硬件的五大基本构件包括运算器、存储器、输入设备、输出设备和（）A.显示器B.控制器C.磁盘驱动器D.鼠标器6.关于冯.诺依曼计算机，下列说法正确的是（）A.冯.诺依曼计算机的程序和数据是靠输入设备送入计算机的寄存器保存的B.冯.诺依曼计算机工作时是由数据流驱动控制流工作的C.冯.诺依曼计算机的基本特点可以用“存储程序”和“程序控制”高度概括D.随着计算机技术的发展，冯.诺依曼计算机目前已经被淘汰7.冯.诺依曼计算机的核心思想是（），冯.诺依曼计算机的工作特点是（）（1） A.采用二进制 B.存储程序 C.并行计算 D.指令系统（2）A.堆栈操作 B.存储器按内容访问C.按地址访问并顺序执行指令D.多指令流单数据流8.一个完整的计算机系统包括（）A.主机、键盘、显示器B.主机及外围设备C.系统软件与应用软件D.硬件系统与软件系统9.下列软件中，不属于系统软件的是（）A．编译软件B．操作系统C．数据库管理系统D．C语言程序解析：计算机的软件分为系统软件和应用软件。
系统软件是为了计算机能正常、高效工件所配备的各种管理、监控和维护系统的程序及其有关资料。
系统软件主要包括如下几个方面：（1）操作系统软件，这是软件的核心（2）各种语言的解释程序和编译程序（如BASIC语言解释程序等）（3）各种服务性程序（如机器的调试、故障检查和诊断程序等）（4）各种数据库管理系统（FoxPro等）10.某单位的人事档案管理程序属于（）A.工具软件B.应用软件C.系统软件D.字表处理软件11.下列选项中，描述浮点数操作速度的指标是（）A.MIPSB.CPIC.IPCD.MFLOP12.半个世纪以来，对计算机发展的阶段有过多种描述。
小妇人各章节内容英语概括
小妇人各章节内容英语概括Chapter 1- Amy, the youngest March sister, is preparing for a party while her mother and sisters are out. She is disappointed that her nose is red and begins to worry about her appearance.Chapter 2- The March sisters, Meg, Jo, Beth, and Amy, struggle with poverty while their father is away serving as a chaplain in the Civil War. They receive a surprise visit from their wealthy Aunt March.Chapter 3- Jo, the tomboyish second eldest sister, learns that her short story has been rejected by a publisher. She decides to pursue her passion for writing and declares that she will not conform to society's expectations.Chapter 4- The March sisters befriend their wealthy neighbor, Theodore "Laurie" Laurence, who becomes an honorarymember of their family. Meg attends a party with Laurie and meets John Brooke, Laurie's tutor.Chapter 5- Meg is invited to attend a dance at the Moffats' home, where she meets the charming Mr. Brooke once again. However, she becomes embarrassed by her simple dress and feels out of place among the wealthier guests.Chapter 6- Jo becomes friends with Laurie and listens to his troubles. She offers to take him to a play, despite his protests, and they enjoy a lively evening together.Chapter 7- The March sisters put on a play and invite Laurie to watch. Jo portrays a male character and is praised for her performance. After the play, the girls receive a surprise visit from Marmee, their mother.Chapter 8- Marmee encourages the girls to help those less fortunate by donating their Christmas breakfast to a poor family. The sisters agree to make sacrifices and find joy in giving to others.Chapter 9- Amy becomes envious of her older sisters and seeks to improve her social standing. She attempts to actlike a lady but ends up humiliated at a party when her hand is accidentally burned.Chapter 10- Jo takes a job as a governess to help support her family, but she struggles to fit in with the wealthy family she works for. She maintains her independent spirit but faces challenges in her new role.。
美国合同法(第二次重述第1部分中英文)
CONTENT 目录（共十六章 385 条）Chapter 1 MEANING OF TERMS 第一章合同条款的含义Chapter 2 FORMA TION OF CONTRATCTS -------- P ARTIES AND CAPACITY第二章合同的订立——当事人及其缔约能力Chapter 3 FORMA TION OF CONTRACTS---MUTUAL ASSENT 第三章合同的订立——意思表示一致CHAPTER 4 FORMA TION OF CONTRACTS — CONSIDERA TION 第四章合同的订立——约因CHAPTER 5 THE STATUTE OF FRAUDS 第五章防止欺诈条例CHAPTER 6 MISTAKE 第六章错误CHAPTER 7 MISREPRESENTATION, DURESS AND UNDUE INFLUENCE 第七章虚假的意思表示，胁迫以及不当影响CHAPTER 8 UNENFORCEABILITY ON GROUNDS OF PUBLIC POLICY 第八章合同因公共政策而不可执行CHAPTER 9 THE SCOPE OF CONTRACTUAL OBLIGA TIONS 第九章合同义务的范围CHAPTER 10 PERFORMANCE AND NON-PERFORMANCE 第十章合同的履行与不履行CHAPTER 11 IMPRACTICABILITY OF PERFORMANCE AND FRUSTRATION OF PURPOSE 第十一章履行不能和履行目的落空CHAPTER 12 DISCHARGE BY ASSET OR ALTERATION 第十二章双方合意或变更合同以解除合同义务CHAPTER 13 JOINT AND SEVERAL PROMISORS AND PROMISEES 第十三章连带允诺人和受允诺人CHAPTER 14 CONTRACT BENEFICIARIES 第十四章合同受益人CHAPTER 15 ASSGINEMNT AND DELEGATON 第十五章合同权利的转让与合同义务的转托CHAPTER 16.REMEDIES 第十六章违约救济Chapter 1 MEANING OF TERMS 第一章合同条款的含义§1. CONTRACT DEFINED 合同定义A contract is a promise or a set of promises for the breach of which the law gives a remedy, or the performance of which the law in some way recognizes as a duty. 合同指的是一个允诺或一组允诺，如果违反此允诺，则法律给与救济；如果其履行了允诺，则法律以某种方式将其视为一项义务。
《小王子》原著英汉对照chapter1
《小王子》Chapter1[第一章]Once when I was six years old I saw a magnificent picture in a book,called True Stories from Nature,about the primeval forest.it was a picture of a boa constrictor in the act of swallowing an animal.Here is a copy of the drawing:我六岁那年，有一次，在一本书里看见一幅很棒的图画，那本书叫《亲身经历的故事》，写原始森林。
那幅图画上，一条大蟒蛇正在吞吃一头猛兽。
我把它描了下来。
In the book it said: “Boa constrictors swallow their prey whole, without chewing it. After that they are not able to move, and they sleep through the six months that they need for digestion.”书里写着：“大蟒蛇把猎物整个吞下，嚼都不嚼。
然后，它动弹不了，它得睡上整整六个月，才能消化肚子里的东西。
”I pondered（沉思）deeply, then, over the adventures of the jungle. And after some work with a coloured pencil I succeeded in making my first drawing. My Drawing Number One. It looked like this:对原始森林的探险，我当时想得很多。
于是，我也用一支彩色铅笔，画出了我的第一张画。
画作第1号。
就像这样：I showed my masterpiece to the grown-ups, and asked them whether the drawing frightened them.我把我的杰作拿给大人们看，问他们：“我的画是不是让你们很害怕？”But they answered: “Frighten? Why should anyone be frightened by a hat?”他们回答：“一顶帽子有什么好怕的？”My drawing was not a picture of a hat. It was a picture of a boa constrictor digesting an elephant. But since the grown-ups were not able to understand it, I made another drawing. I drew the inside of the boa constrictor, so that the grown-ups could see it clearly. They always need to have things explained. My Drawing Number Two looked like this:可我画的不是帽子呀。