We will start by studying the motion of a particle. We think of particle as a body which has mass, but has negligible dimensions. Treating bodies as particles is, of course, an idealization which involves an approximation. This approximation may be perfectly acceptable in some situations and not adequate in some other cases. For instance, if we want to study the motion of planets it is common to consider each planet as a particle

§1 线性变换的定义 §2 线性变换的表示与运算 §3 线性变换在不同基下的表示 §4 不变子空间，像空间和核空间 §5 特征根和特征向量

In this lecture, we consider the problem of a body in which the mass of the body changes during the motion, that is, m is a function of t, i.e. m(t). Although there are many cases for which this particular model is applicable, one of obvious importance to us are rockets. We shall see that a significant fraction of the mass of a rocket is the fuel, which is expelled during flight at a high velocity and thus, provides the propulsive force for the rocket

In lecture D9, we saw the principle of impulse and momentum applied to particle motion. This principle was of particular importance when the applied forces were functions of time and when interactions between particles occurred over very short times, such as with impact forces. In this lecture, we extend these principles to two dimensional rigid body dynamics. Impulse and Momentum Equations Linear Momentum In lecture D18, we introduced the equations of motion for a two dimensional rigid body. The linear momen- tum for a system of particles is defined

§1 热带大气运动的主要特征 §2 热带大气运动的尺度分析 §3 热带大气波动 §4 热带扰动发生、发展的机制 §5 热带气旋结构的动力学分析

1、学习投影法的基本理论及国家标准制图的基本规定 2、能够绘制和看懂简单的零件图和装配图 3、培养空间想象和空间分析的初步能力 4、了解计算机绘图软件绘图的基本方法

§1 机械波的产生和传播 §2 一维简谐波的表达式 §3 波动方程和波速 §4 波的能量 §5 惠更斯原理 §6 多普勒效应 §7 波的叠加 §8 驻波(standing wave) §9 波的干涉

9-1 电路的频率特性与网络函数 9-2 RC电路的频率特性 9-3 RLC串联谐振电路 9-4 GCL并联谐振电路 9-5 电源电阻及负载对谐振电路的影响

5.1 程序分析 5.1.1 图表技术及程序分析技巧 5.1.2 工艺程序分析 5.1.3 流程程序分析 5.1.4 线路图分析 5.1.5 线图分析 5.2 操作分析 5.2.1 概述 5.2.2 人机操作分析 5.2.3 联合操作分析 5.2.4 双手操作分析 5.3 动作分析 5.3.1 动作分析的含义及目的 5.3.2 动作分析方法 5.3.3 动素的名称、定义及形象符号 5.3.4 动作经济原则 5.3.5 动作改善

第6章灌溉水源和取水方式 1灌溉水源 2灌溉取水方式 3引水灌溉工程的水利计算 4地下水资源评价与开发利用