Who is in the Space Enterprise and what are their roles? Reading A. US National Space Policy, http://www.whitehouse.gov/wh/eop/osTp/htmL/ostpHomehtml B.DodSpacePolicyhttp://www.c3i.osd.mil/org/c3is/spacepol/index.html C.Nrohomepagehttp://www.nro.mil D.Nasahomepagehttp://www.nasa.gov/enterprises.html

History and Policy in the sixties Reading 1. Spaceflight and the Myth of Presidential Leadership?\Chapters 2&3 2.“ The Heavens and the earth” Chapters 11-22 3.“ Beyond Horizons” Chapter3 Strategic themes The use of the Space Program as a political tool to show the superiority of the

The Eighties Reading 1. Chap. 5 and 6, Spaceflight and the myth of Presidential Leadership.\ 2. Chap. 2, \Space Policy: How Technology Economics and Public Policy Intersect.\ 3. Chap. 5 and 6, \Beyond Horizons.\ Strategic Themes

The nineties 1. Chap. 5 and 6, Spaceflight and the Myth of Presidential Leadership 2. Chap. 7 and 8, Beyond Horizons 3.\National Space Policy 4.The Satellite Remote Sensing Industry 5.\Long Range Plan; Executive Summary of US Space Command 6. State of the Space Industry 1999

2.4.1 方块图元素 2.4.2 几个基本概念及术语 2.4.3 方块图的绘制 2.4.4 方块图的简化——等效变换 2.4.5 信号流图和梅逊公式（S·J·Mason）

5.1频率特性及其表示法 5.2典型环节对数频率特性曲线的绘制 5.3极坐标图(Polar plot),幅相频率特性曲线,奈奎斯特曲线 5.3.1积分与微分因子 5.3.2一阶因子 5.3.3二阶因子 5.3.4传递延迟

6.1 系统的设计与校正问题 6.2 常用校正装置及其特性

1.1 引言 1.2 自动控制系统示例 1.3 闭环控制和开环控制 1.4 自动控制系统的分类 1.5 对自动控制系统的基本要求 对本课程的基本要求

2.3.5典型环节及其传递函数 任何一个复杂系统都是由有限个典型环节组合而成的。典型环节通常分为以下六种:

Lecture 4 Introduction to Spline Curves 4.1 Introduction to parametric spline curves Parametric formulation =r(u),y=y(u), z=2(u) or R=R(u)(vector notation) Usually applications need a finite range for u(e.g. 0