Chapter 4 Objectives After you have read and studied this chapter, you should be able to Define an instantiable class with multiple methods and a constructor. Differentiate the local and instance variables. Define and use value-returning methods. Distinguish private and public methods. Distinguish private and public data members. Describe how the arguments are passed to the parameters in method definitions

第三节曲线的曲率与挠率 第十讲曲线的曲率与挠率 课后作业: 阅读:第三章第三节曲线的曲率与挠率pp87-94 预习:第三章第四节在天体力学中的应用p.94-96 作业: 1.在下列曲线的曲率k和挠 (1) F=(acht, asht, at): 2)F=(-sint, 1-cost, 1) (3)F=( t sInt, t cos t,an)(圆锥曲线) (4)F=(r2x2)

4.1 LTI Discrete-Time Systems in the Transform Domain · Such transformdomain- representations provide additional insight into the behavior of such systems It is easier to design and implement these systems in the transform-domain for certain applications We consider now the use of the DtFt and the z-transform in developing the transform- domain representations of an LTI system

2.1 Discrete-Time Signals: Time-Domain Representation Signals represented as sequences of numbers, called samples Sample value of a typical signal or sequence denoted as x[n] with n being an integer in the range-oo≤n≤∞ x[n] defined only for integer values of n and undefined for noninteger values of n Discrete-time signal represented by {x[n]}

The Nature of Derivatives derivative(衍生产品/工具) is an instrument whose value depends on the values of other more basic underlying(标的/原 生) variables

第一章植物病原真菌 第一节植物病原真菌概述 什么是真菌? Fungi: Eukaryotic organisms without plastids, nutrition absorptive (osmotrophic), never phagotrophic, lacking an amoeboid pseudopodial phase; cell wall containing chitin and B-glucans; Golgi bodies or individual cisternae present; unicellular or filamentous and contsisting of multicelluar coenocytic haploid hyphae (homo-or heterokaryotic); mostly non-flagellate, fllagella when present always lacking mastionemes; reproducing sexually or asexually, the diploid phase generally short-lived, saprobic, mutualistic, or parasitic.(Hawksworth, 1997)

Nature of Swaps A swap is an agreement to exchange cash flows(现金流)at specified future times according to certain specified rules

Introduction What is international trade theory? International trade theory is basically an exercise in applied general equi- librium modeling. This means that in many cases one can use the general theorems that apply for any Arrow-Debreu economy, most notably about the existence and welfare properties of equilibria. What makes international trade a separate field is that it utilizes some assumptions that allow for much

UN/T 3 TEXT A PRE-READING QUESTIONS 1.Can you tell us something about Stevie Wonder according to our text? 2.What does the title mean? 3. What do you think of his accomplishment? ANSWER TO QUESTION (1) ? pop star/ born blind/ black/ poor family/ love music ? learn to play instruments very quickly/has been recording artist since the age of ten ? being an adult,encounter serious car accident/fight back from the shadow of death begin to pay more attention to the world outside/bring sunshine

1、What is an operating system?什么是操作系统? 2、Simple Batch Systems简单批处理系统 3、Multiprogramming Batched Systems多道程序批处理系统 4、ime- Sharing Systems分时系统 5、Personal-Computer- Systems个人计算机系统 6、Parallel Systems并行系统 7、Distributed Systems分布式系统 8、Real-Time Systems实时系统