对第k个码元的相位常数的选择应保证MSK信号相位在码元转换时刻是 连续的。根据这一要求,由式(922)可以得到相位约束条件为

8.1图的定义及相关术语 8.2通路回路图的连通性 8.3图的矩阵表示 8.4例题选解

1.设有一平面薄板(不计其厚度),占有xOy面上的闭区域D,薄 板上分布有密度为=u(x,y)的电荷,且x,y)在D上连续,试用二重 积分表达该板上全部电荷Q

一、型钢及其连按:P325 (一)型钢的法万法:表115

General Organization Comprehension Language points Interaction activity

Text I Christmas What do you know about Christmas? Christmas Christmas tree Christmas card Christmas books Nicholas SAINT

Background information Croydon city in the south east of England Victorian house Sash-window General School Certificate

二、活塞环:分成气环和油环两大类。 (一)作用: 1、气环:(1)密封(防止燃气漏入曲轴箱);气环是主要作用,是传热作用的前提. (2)传热(将活塞头部吸收的70%~80%的热量传导给气缸壁)

Teaching Outline Pre-reading Questions Background Information Passage AnalySIs style and structure spelling word derivation language points useful expressions

Unit 5 Language structures Dialogue 1 Dialogue 2 Reading1&2