S-Plus石油城市数据框架 石油的月超额回报,包含股票和市场。 SUMMARY: The oilcity data frame has 129 rows and 2 columns. The sample runs from April 1979 to December 1989. This data frame contains the following columns VALUE

Spring 2003 Lagrange's equations Joseph-Louis lagrange 1736-1813 http://www-groups.dcs.st-and.ac.uk/-history/mathematicians/lagranGe.html Born in Italy. later lived in berlin and paris Originally studied to be a lawyer Interest in math from reading halleys 1693 work on

FURTHER BASICS 5-1 · LINEAR MOMENTUM m NEWTON'S LAW ∴F=P ow TAKE THE MOMENT OF MDMENTUM ANGULAR MOMENTUM MUST EXPLICITLY OEFINE

4.1叠加定理(Superposition Theorem) 4.2替代定理(Substitution Theorem) 4.3戴维宁定理和诺顿定理 (Thevenin-Norton Theorem) 4.4特勒根定理(Tellegen's' Theorem) 4.5互易定理(Reciprocity Theorem) 4.6对偶原理(Dual Principle)

讨论导数,即讨论lim的极限是否存在,而不 是研究改变量本身.实践中,我们关心的是:当 自变量x有微小改变量x时,函数y相应的改变量 y与x有何关系,大小又如何? 先看一个实际例子:正方形的边长由x变到x+△x 时,其面积改变多少?由S=x2知:

课堂练习如图,波沿-x方向传播,0M=2m,M点的振 动方程:y=10cos(t+),u=2m/s,求波动方程 (即波函数)

10—1电流密度 一、电流 电流为通过截面S的电荷随时间的变化率

UNCLASSIFIED Unclassified Clinton administration 1993 National security space activities shall contribute to US national security by supporting right of self-defense of US, allies and friends deterring, warning, and defending against enemy attack assuring hostile forces cannot prevent our use of space ountering, if necessary, space systems and services used for hostile purposes enhancing operations of U. S. and allied forces ensuring our ability to conduct military and intelligence space-related satisfying military and intelligence

一、填空题: 1、碳的质量分数大于2.11%的铁碳合金称之为铸铁,通常还含有较多的Si、Mn、S、P等元素。 2、优质碳素结构钢的钢号是以碳的平均万分数来表示的

Related Information 1. Newspaper newspaper, in broad sense, is an unbound publication issued at regular intervals that seeks to inform, analyze, influence, and entertain. A newspaper can be published at various intervals but usually appears weekly or daily