1-1设英文字母E出现的概率为0.105,x出现的概率为0.002试求E及x的信息 量

1.设E是R中一族(开的、闭的、半开半闭的)区间的并集.证明E Lebesgue是 可测集

如图所示电路,其中电源电动势为E= sinot(E、都是 常数),电阻R和电感L都是常量,求电流i(t)所满足的微分方程 由电学知道,当电流变化时

求函数的y=arsh表示式 y=arsh是x=shy的反函数,因此,从 X=~e-y 2 中解出y来便 arsh是.令u=ey,则由上式有 u2-2xu-1=0. 此二次方程根为 u=x±√x2+1 因为u=e0,故上式根号前应取正号,于是

Electronic Commerce Prentice Hall © 2006 2 Learning Objectives 1. Define the e-supply chain and describe its characteristics and components. 2. List supply chain problems and their causes. 3. List solutions to supply chain problems provided by EC

11, Circuit Switching and Packet Switching destination[. de ti' n e i jan]n.目的地,终点 allocate[' aelak e i t]vt.分配,分派,配给 release[ri'li:s]vt.释放,放松,发布 Jargon[吗a:gan]n.行话,土语

Electronic Commerce Prentice Hall © 2006 2 Learning Objectives 1. Describe the factors that influence consumer behavior online. 2. Understand the decision-making process of consumer purchasing online. 3. Describe how companies are building one-to-one relationships with customers. 4. Explain how personalization is accomplished online. 5. Discuss the issues of e-loyalty and e-trust in EC. 6. Describe consumer market research in EC

Electronic Commerce Prentice Hall © 2006 2 Learning Objectives 1. Describe electronic retailing (e-tailing) and its characteristics. 2. Define and describe the primary e-tailing business models. 3. Describe how online travel and tourism services operate and their impact on the industry

2.1线性表的类型定义 定义:线性表是一个有n(n>=0)个元素 的有限序列,各元素具有相同的数据类型 (同一数据对象)。例妇(a,b,C,d,e)与 (23,45,67,89,90,…100)都称为线性表 (a,b,c,d,e)也称为串

一、可逆电池与不可逆电池 1. 可逆电池的3个条件如电动势为E的铜锌电池，将一外加电动势E’与之相联