Individuals are the objects described by a set of data. Individuals may be people, but they may also be animals Relationship or things Between Variables A variable is any characteristic of an individual. a variable can take different values for different ndividuals The 1997 survey data set, for example, includes data about a sample of women The individuals described are the women

蒸发装置的操作费用主要是汽化大量水分(W)所需消耗的能量。通常将每1kg加热蒸汽所能蒸发 的水量()称为蒸汽的经济性,或用溶液中蒸发出1kg水所需消耗的生蒸汽的量()表示蒸汽的 利用率,个,生蒸汽利用率个,它是蒸发操作是否经济的主要标志。由前面学过的知识我们知道, 在单效蒸发中,若物料的水溶液先预热至沸点后假如蒸发器,忽略生蒸汽与产生的二次蒸汽的汽化潜热 的差异,不计热损失

23 F.E. and B.E. Meshing Algorithms 23.1 General 23.1.1 Finite Element Method(FEM) 23.1.2Mesh 23. 1.3 Some Criteria for a Good Meshin 23. 1.4 Finite Element Analysis in a CAD Environment

能从能量的观点理解热力学第一定律及其表达式 掌握ΔU=W+Q的适用范围,初步运用能量守恒定律 分析、计算、解决有关问题。 明确热力学能、功和热的定义和意义。 掌握不同过程体积功的计算

概念题 1.热力学第二定律要解决的基本问题是 2.热力学第二定律的克劳修斯说法是:开尔文说法是_ 3.理想气体恒温膨胀时Q=W,它所吸收的热全部用来做功,这是否违背开尔文说法,为什么?

教学任务及要求: 掌握辅音[p][w][]的发音 学习调型3 课文

根据所示Fe-W-C三元系的低碳部分的液相面的投影图,试标出所 有四相反应

Ch. 21 Univariate Unit Root process 1 Introduction Consider OLS estimation of a AR(1)process, Yt= pYt-1+ut where ut w ii d (0, 0), and Yo=0. The OLS estimator of p is given by and we also have

Earth Orbiting Clusters Edmund M C Kong SSL Graduate Research Assistant Prof david w. miller Director, MIT Space Systems Lab Space 2001 Conference& Exposition Albuquerque August28-30,2001

CSMA/CD and Ethernet Two way cable wsws Ws W CSMA with Collision Detection(CD)capability Nodes able to detect collisions Upon detection of a collision nodes stop transmission Reduce the amount of time wasted on collisions Protocol