Graphs(review) Definition. a directed graph(digraph G=(, E)is an ordered pair consisting of a set y of vertices(singular: vertex) a sete c× of edges. In an undirected graphG=(V, E), the edge set e consists of unordered pairs of vertices In either case, we have El=O(v2).Moreover if G is connected, then E2v-l, which

WHATIS DESIGN??? A DESIGN IS PLAN FOR Manufacturing an artifact E A refrigerator or a rug Building the mean of manufacture E Afactory or a chemical plant Building a structure E A bridge or a baseball stadium Implementing an organization A hospital emergency room E A air transportation system

第六章图 6.1图的定义和术语 图(Graph)图G是由两个集合V(G)和E(G)组成的,记为G=(V,E)其中:V(G)是顶点的非空有限集 E(G)是边的有限集合,边是顶点的无序对或有序对有向图有向图G是由两个集合V(G)和E(G)组成的其中:V(G)是顶点的非空有限集

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4.10.1周期误差的测定 一、周期误差 测距信号为e1,串扰信号为e2,相位差为,串扰信号与测距信号的强度比为K=e2/e1,串扰信号引起的附加相位移为△。K大,ΔΦ大

7.1电子邮件的基本概念 E-mail是 Internet最早的主要应用之一。 大多数用户使用互联网络,都是从使用电子邮 件(Electronic mail,简称E-mai1)开始的。 E-mail有着广泛的应用,方便、经济、快捷。 提供Emai收发的邮件服务器是各类网站 的一个重要组成部分,尤其对于一个独立的企 业或机构来说,建立邮件服务器是十分必要的

一、选择题 A型题 1.a2.e3.d4.c5.d6.b7.8.d9.c10.e11.a 12.e13.a14.c15.b16.a17.d18.e19.d20.c21.c22.c 23.c24.b25.b26.c27.a2

1、设a1+(-1) ,n=1,2,…,a=0 n (1)对下列e分别求出极限定义中相应的N E1=0.1,E2=0.01,E3=0.001

一、数据集合 Measurements of items e.g., Yearly sales volume for your 23 salespeople e.g., Cost and number produced, daily, for the past month 二、基本单元 The items being measured e.g., Salespeople, Days, Companies, Catalogs, . 三、变量 The type of measurement being done e.g., Sales volume, Cost, Productivity, Number of defects

1．掌握卤代烃的分类和命名。2．掌握SN1、SN2反应的动力学，立体化学及影响因素（烃基结构、试剂亲核性、离去基团及溶剂）。3．掌握卤代烃的化学性质、格氏试剂的制法和性质。4．掌握卤代烃的消除反应（E1、E2）机理和查依采夫规则，消除反应的立体化学特征。5．理解卤代烯烃的三种类型及反应活性。6．理解SN1和SN2、E1与、E2历程的竞争。7．了解重要的亲核取代反应及其应用。8．了解重要卤代烃的制法和用途