现金流量和资金等值计算 一、现金流量构成 ·现金流量(Cash Flow,CF) 现金流入(Cash In Flow,CI) 销售(经营)收入、资产回收、借款等 现金流出( Cash Out Flow,CO) 投资、经营成本、税、贷款本息偿还等 净现金流量(CF)

1 交通流量 2 车速 3 密度 k、车道占有率车头间距 hs 、车头时距 ht 4 交通流的基本特性及其相互关系 5 间断流特性

消费行为分析 —、一牛奶消费与消费行为分析思路 1、预算约束线 2、无差异曲线与边际替代率 3、消费者理性选择行为 4、消费者剩余

Lecture D32: Damped Free Vibration Spring-Dashpot-Mass System k Spring Force Fs =-kx, k>0 Dashpot Fd =-cx, c>0 Newton's Second Law (mx =EF) mx +cx+kx (Define)Natural Frequency wn=k/m,and

Lecture D33: Forced Vibration Fosinwt m Spring Force Fs =-kx, k>0 Dashpot Fd =-ci, c>0 Forcing Fext Fo sin wt Newton's Second Law (mix =CF) mx+cx+kx= Fo sin wt =k/m,=c/(2mwn)

背景 各核电站国家都高度重视核电站安全的审查 和监督。 各国的核管理当局和国际原子能机构(IAEA )以及世界核营运者协会(WANO)建立了 常规和专门的安全审查制度。 各类审查一般不是综合性的,且较少考虑安 全标准和运行实践的改善、核电厂老化的累 积效应、运行经验反馈以及科学技术的发展

HRA面临的一大难题一 数据匮乏且可用性不良 人因数据采集极度困难,致使HRA长 期缺乏较充分的可用数据 现有主要人因数据库 人员可靠性分析手册, NUCLARR, 英国CORE-DATA 三方面问题

When the only force acting on a particle is always directed to- wards a fixed point, the motion is called central force motion. This type of motion is particularly relevant when studying the orbital movement of planets and satellites. The laws which gov- ern this motion were first postulated by Kepler and deduced from observation. In this lecture, we will see that these laws are a con- sequence of Newton's second law. An understanding of central

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 this lecture, we will consider how to transfer from one orbit, or trajectory, to another. One of the assumptions that we shall make is that the velocity changes of the spacecraft, due to the propulsive effects, occur instantaneously. Although it obviously takes some time for the spacecraft to accelerate to the velocity of the new orbit, this assumption is reasonable when the burn time of the rocket is much smaller than the period of the orbit. In such cases, the Av required to do the maneuver is simply the difference between the