string is composed ofn(20) characters in an orderly sequence recorded as s:“c1C2C3…Cn” S is string name c123n is value is a character n is string length Such as,S=“ TSinghua University

二乘法 一般的最小二乘逼近(曲线拟合 的最小二乘法)的一般提法是:对 给定的一组数据(x2y)(=0, 要求在函数类0={…,n中找 一个函数y=S(x),使误差平方和 6l2=∑62=∑S(x)-yF=min∑[S(x)-y

第四章饱和碳原子上亲核取代反应 (Aliphatic Nucleophilic Substitution) 一.反应类型 二.反应机理 1.S1机理 2.S2机理 3.离子对机理 三.立体化学 1.SN2反应 2.S1反应

Teaching points I. Background information II. Introduction to the passage III. Text analysis IV rhetorical devices V. Questions for discussion

第一节遥感、地理信息系统与全球定位系统综合应用概述 一、地理信息系统及其在3S技术中的作用 二、全球定位系统及其在3S技术中的作用 三、遥感技术及其在3S技术中的作用

4.1菲涅耳(Fresnel)公式 入射光在媒质界面处分为反射和折射两部分。 一振动矢量的分解 将振动矢量分解为垂直于入射面的S分量和平行于入面的P分量P、S和k构成右 手系。S沿+y方向为正。图示为各个分量的正方向

Above, analysis for multivariable control systems with respect to nominal and robust st ability as well as nominal and robust performan has been assessed. It was assumed that the spec- ifications for robustness were given in terms of weight matrices Wu(s) and Wu2(s), and that the performance specifications similarly were given by weight matrices Wpi(s) and Wp2()

Into I. Basic listening practice 1. Script w: What's that? Is it a toy? Did it get chewed by a dog? M: Hey, that s my mascot! My uncle gave it to me when I was five, and it's been with me ever since. It brought me luck in all my college exams. I can t bring myself to

Uints I. Basic listening practice 1. Script W: I bought a camera from your store. Here's my receipt. I know it's just warranty period, but the camera hasn't worked properly for some time, and now it's not focusing at all. M: We're sorry you've has problem with one of our cameras. I t seems that the camera has suffered some damage, but you've been a regular customer, and wed

4-1试求题4-1图所示电路中电容上电荷量的初始值以及电容上电荷量在t=0.02s时的值。设换路前电 路工作了很长的时间。 4-2在工作了很长时间的题4-2图所示电路中开关S1和S2同时开、闭,以切断电源并接入放电电 阻R。试选择R的阻值,以期同时满足下列要求: