A pendulum is a rigid body suspended from a fixed point (hinge) which is offset with respect to the body's center of mass. If all the mass is assumed to be concentrated at a point, we obtain the idealized simple pendulum. Pendulums have played an important role in the history of dynamics. Galileo identified the pendulum as the first example of synchronous motion, which led to the first successful clock developed

• 一、公共项目及其经济分析的特点 • 二、从财务分析到经济分析 • 三、费用-效益分析 • 四、费用-效果分析 • 五、公用设施项目分析 • 六、公共项目的民间参与

第一节 设备更新概述 第二节 设备大修理的经济分析 第三节 设备更新的经济分析 第四节 设备租赁分析 第六节 改扩建和技术改造项目的财务评价

(1)理解微生物处理废水的基本原理,掌握活性污泥法的原理与常用的几种工艺流程,掌握生物膜法的原理与几种典型处理工艺;掌握厌氧生物处理技术的机理与影响因素以及处理工艺 (2)熟悉污泥的性质和常见的处理技术

一、粉碎和筛分 （一）粉碎： 主要是借机械力将固体物料粉碎成微粉的操作过程。 起粉碎作用的机械力有冲击力（impact）、压缩力（compression）、研磨力（attrition或rubbing）和剪切力（cutting或shear）。粉碎过程一般是上述几种力综合作用的结果

In this lecture, we consider the motion of a 3D rigid body. We shall see that in the general three dimensional case, the angular velocity of the body can change in magnitude as well as in direction, and, as a consequence, the motion is considerably more complicated than that in two dimensions. Rotation About a Fixed Point We consider first the simplified situation in which the 3D body moves in such a way that there is always a point, O, which is fixed. It is clear that, in this case, the path of any point in the rigid body which is at a

3.1 货币的时间价值 货币的时间价值 3.2 利息公式 3.3 等值计算实例 3.4 常用的还本付息方式 常用的还本付息方式 3.5 电子表格运用

辅料的选择首先是为了满足不同剂型的 需要，同时也是为了药物在生产、贮存及 使用中保持稳定，使大生产的质量体质恒 定。选择辅料也是为了制剂外观的美观和 便于工艺操作

In this lecture, we will particularize the conservation principles presented in the previous lecture to the case in which the system of particles considered is a 2D rigid body. Mass Moment of Inertia In the previous lecture, we established that the angular momentum of a system of particles relative to the center of mass, G, was

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