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

5.1 Introduction 5.2 Energy Balance 5.2.1 Energy Balance Equations 5.2.2 Calculations of Various Energy 5.2.3 Methods and Approaches 5.3 Thermal effects 5.3.1 Thermal in Physical changes 5.3.2 Thermal in Chemical changes 5.4 Examples of Energy Balance 5.5 Calculation of Consumption of Coolant, heating source and other energy 5.5.1 Coolant and Heating source frequently￾used 5.5.2 Consumption of Coolant and Heating source 5.5.3 Consumption of fuel 5.5.4 Consumption of Electric Energy 5.5.5 Consumption of Compressed air 5.5.6 Calculation of Sucking rate Vacuumed

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

一、生产安全 实现安全生产的最基本的条件，就是保证人和机 器设备在生产中的安全。 1.安全制度 主要的安全制度有：安全机构和安全网制度； 安全教育制度；安全检查制度；安全措施管理制 度；事故管理制度；动火制度；劳动防护用品管 理制度；登高作业安全制度；受压容器安全制度； 尘毒岗位安全制度

第一章 油井基本流动规律 第二章 自喷与气举采油 第三章 有杆泵采油 第四章 无杆泵采油 第五章 注水 第六章 水力压裂 第七章 酸化 第八章 防砂防蜡及堵水 第九章稠油及高凝油基本特性、稠油及高凝 第十章完井与试油投产

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

生产过程 是指从准备生产开始，直到此 产品产出的全过程，是劳动者借助于劳 动资料直接或间接的作用于劳动对象， 使之成为产品的全过程。 医药企业的生产过程，主要包括生产准 备过程、基本生产过程、辅助生产过程、 生产结束清场与清洗和生产服务过程

劳动定额 1．劳动定额的作用 劳动定额是在一定的生产技术和合理的劳动组织 条件下，为生产一定的产品或完成一定的工作所 规定的必要劳动量的标准

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、掌握设备有形、无形损耗的类型及其对设备价值的影响； – 2、掌握设备折旧的含义、折旧方法与计算； – 3、掌握设备经济寿命概念及其计算； – 4、掌握存在新设备的设备更新原则及方法； – 5、掌握存在税收影响的设备租赁与购买比较决策