Abstract Model Specifications Build an abstract model of required software behavior using mathematically defined(perhaps using axioms )types(e. g sets, relations) Define operations by showing effects of that operation on the model Specification includes Model

Too complex for complete analysis Separation into non-interacting subsystems distorts the results The most important properties are emergent Too organized for statistics Too much underlying structure that distorts the statistics Organized Complexity\(Weinberg) Copyright Nancy Leveson, Sept 1999

Introduction (chapter objectives) Complex envelopes and modulated signals Spectra of bandpass signals Nonlinear distortion · Communication circuits(mixers, phase- locked loops, frequency synthesizers, and detectors) Transmitters and receivers · Software radios

L Translation(30%) PartI(10%) 1. Will you please send us a copy of your catalogue and current price-list for bicycles? We are interested in bicycles for both man and woman, and also for children. We are the leading bicycle dealers in the city, where cycling is popular, and have branches in five neighboring districts. If the qual ity of your bicycles is satisfactory and the prices are reasonable, we will place regular orders for fairly large numbers 2. Multimedia software is used for electronic publishing and electronic games and in employee training programs, The term multimedia is also used to describe home entertainment systems and other

Text 1 Data Structure Exercises 1. Multiple choices (1)The attributes of the stack are(A B C. queue D. built into their circuitry

Unit 6 Multimedia Text 1 What is multimedia? The answer is neither simple nor easy. Multimedia is the combination of computer and video technology. In fact, Multimedia is just two media: sound and is made from a mix o hardware and software. or machine and ideas

一、词汇(选择一个最合适的词汇,将对应的英文字母填入空格内。每题1分,共10分) 1, refers to the parts of the computer that you can see and touch. A. Software B. Hardware C. Hardship D. Instruction

第1章软件工程概述 什么是软件?什么是软件危机?其产生原因和解决途径是什么?

13.1软件维护概述 13.2软件维护活动 13.3修改程序的步骤和副作用 13.4软件的可维护性 13.5软件的逆向工程和再工程

◆ 12.1 软件测试基础 ◆ 12.2 软件测试方法与技术 ◆ 12.3 软件测试过程 ◆ 12.4 面向对象的测试方法 ◆ 12.5 程序的静态分析方法 ◆ 12.6 软件调试方法 ◆ 12.7 软件测试工具 ◆ 12.8 软件的可靠性