Originally designed to be efficient in hardware . A LOT of money has been invested in hardware. although DES standard is public there was considerable controversy over design – in choice of 56-bit key (vs Lucifer 128-bit) – and because design criteria were classified
It is nearly impossible to design a linearphase IIR transfer function It is always possible to design an FIR transfer function with an exact linear-phase response Consider a causal FIR transfer function H(z) of length N+1, i.e., of order N:
▪ Features of Good Relational Design ▪ Functional Dependencies ▪ Decomposition Using Functional Dependencies ▪ Normal Forms ▪ Functional Dependency Theory ▪ Algorithms for Decomposition using Functional Dependencies ▪ Decomposition Using Multivalued Dependencies ▪ More Normal Form ▪ Atomic Domains and First Normal Form ▪ Database-Design Process ▪ Modeling Temporal Data
The recurring aspects of designs are called design patterns. A pattern is the outline of a reusable solution to a general problem encountered in a particular context Many of them have been systematically documented for all software developersto use
7.1 User Centred Design Software development should focus on the needs of users Understand your users Design software based on an understanding of the users’tasks Ensure users are involved in decision making processes
第一章 生产与运作管理概述 Introduction to the Production and Operations 第二章 质量管理 Quality Management 第三章 项目管理 Project Management 第四章 产品与过程设计 Design of Product and Process 第五章 设施与作业设计 Design of Facilities and Jobs 第六章 生产能力与计划 Capacity and Planning 第七章 独立需求系统 Systems for Independent Demand 第八章 相关需求管理 Management for Dependent Demand 第九章 进度计划和控制 Scheduling and Control 第十章 新型生产系统 New Production Systems
2.1 Analysis 2.2 Asymptotic Order of Growth(渐进分析) 2.3 Three Techniques for Designing Algorithms 1. Greedy Algorithms 2. Divide and Conquer 3. Dynamical Programming