系统动态响应的基本特征是由闭环极点(即闭环特征方程的 根)在s平面上的位置决定的。根轨迹法的基本思想是:在 知开环传递函数零、极点分布基础上,通过图解法研究系统某 一个或多个参数变化时,对控制系统闭环极点分布的影响

1. The three common forms of business organizations are 2. The difference between the increases(including the beginning balance) and decreas recorded in an account is called the account 3. Assets= Liabilities Owner's Equity\is called the equation or balance sheet equation 4 An economic event that changes the financial position of an organization, and that often

Lesson 14 Managerial Accounting II: Applications Exercise 1. XYZ Company's most recent contribution format income statement is presented below: Sales 25000 Less: Variable Expenses $15000 Contribution Margin

Management Key Concepts Organizations: People working together and coordinating their actions to achieve specific g coals o Goal a desired future condition that the organization seeks to achieve Management: The process of using organizational resources to achieve the organization's goals by

Organizational Conflict Conflict exists in situations where goals, interests or values of people are incompatible and they block other's efforts to achieve their goals Some level of conflict is inevitable given the wide range of goals in a firm Some conflict is good for organizational performance Too much causes managers to spend much time responding to conflict

The Global environment oIn the past, managers have viewed the global sector as closed Each country or market was assumed to be isolated from others Firms did not consider global competition, exports oToday's environment is very different managers need to view it as an open market Organizations buy and sell around the world Managers need to learn to compete globally Irwin/McGraw-Hill CThe McGran-Hill Companies, Inc, 2000

当波源与观察者相对静止时观察者接受波的频率和波源发射的频率相等。 多普勒效应(Doppler Effect):当或接收器(观察者)R,或S、R都相对媒质运动 时,接收器所测得的频率不等于波源振动频率的现象(对机械波) 多普勒效应

4.1写出下列信号对应于s平面的复频率。 (1)e-sin(-5t) (2)3e-e(t) (3)cos 2t (4)2e-cos(2t+60°)

一、光的干涉(Interference) 1.杨氏实验(Young's' Experiment) （1) Equipment Phenomena

Soil fertil Soil fertility is the characteristics of soil that enables it to Provide nutrients in adequate amounts in adequate time In appropriate balance for growth of particular plant(s)