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)

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

D244BD RIGID BODY DYNAMICS KINETIC EWEGY In echure we derwed am kinenc a susem u dm T= Fere ts the velouty relanve to G. for a nald body we ca wate Uing the vechor nidontklyAxB=Ax

第一章 总论 第二章 汽车发动机 第三章 汽车底盘 第四章 汽车电气设备 第五章 汽车车身 第六章 汽车的基本性能 第七章 汽车运行材料 第八章 汽车电子控制与电动汽车