第八章 8.1证明:EX(t)=P((t)=1)-p((t)=-1=0,elx(t)2=p(x(t)=1)+p(x(t)= -1)=1<.((s),(s+t))= E((s)X(+t))-EX (s)EX(+t)= (x()x(s+t))=((x(s)=1,x(s+t)=1)+(x(s)=-1,x(s+t)=-1)) ((x(s)=1,x(s+t)=-1)+p(x()=-1,X(s+t)=1).注意到事件(x(s)= 1,X(s+t)=1)=(x(s)=1)(uk(n(s,+t)=2k).故(x(s)=1,X(s+t)= 1)=P(X(s)=1)P(△N(s,8+t)=2k)=(1/)o(ut)e-(k).同理

• An overview on Internet applications and QoS requirements • Internet architecture and Protocols • Internet traffic control and Congestion Control - Traffic policing and shaping - buffer management (e.g. tail drop, AQM: RED, Blue,…) - Packet scheduling (e.g. WFQ, DRR, etc.). - TCP, ECN, etc. • Standardized services - Intserv/RSVP, DiffServ

Design Process Modeling Constraints E-R Diagram Design Issues Weak Entity Sets Extended E-R Features Design of the Bank Database Reduction to Relation Schemas Database Design UML

Design Process Modeling Constraints E-R Diagram Design Issues Weak Entity Sets Extended E-R Features Design of the Bank Database Reduction to Relation Schemas Database Design UML

1. Input-output economics, the foundation of CGE & GSC (a) the input-output table (b) national accounts (c) the one-country input-output model (d) the Leontief paradox (e) effective rates of protection (e) the multi-regional or multi-national I-O model - starting point for CSC analysis 2. CGE modelling (a) Johansen’s model of Norway (b) Johansen’s solution matrix versus Leontief’s inverse (c) trade in a CGE model, Armington to Melitz 3. Applying existing CGE models to supply chain issues (a) Walmsley & Minor on reversing NAFTA (b) Dixon, Rimmer and Waschik on Buy-America(n) 4. Towards a CGE model with supply chain features: designs, components, assembly and sales 5. Concluding remarks

（1)总压100kPa,温度25℃的空气与水长时间接触,水中的M2的浓度为多 少?分别用摩尔浓度和摩尔分率表示。空气中M2的体积百分率为079。 解:将空气看作理想气体:y=0.79 p*=yp=79kPa 查表得 E=8.76×105kPa P */E=10 H=p/EMS)=1000(876×105×18)=6342×10-kmL(kNm) C=p*H=79×6342×105=501×10-4kmo/m3

第四章随机变量的数字特征 4-5矩 1、定义 若EXk存在,称之为X的k阶原点矩 若E(X-EX)存在,称之为X的k阶中心矩 若E(X-EX)(Y-EY)存在,称之为X和Y的k+1 阶混合中心矩。 所以EX是一阶原点矩,DX是二阶中心矩, 协方差Cov(X,Y)是二阶混合中心矩

案例之三上海海关通关业务EDI应用 中华人民共和国上海海关-Microsoft Internet Explorer 文件(E)编辑(E)查看()收藏(A)工具(I)帮助(H) 地址(D)htp:www. d)htp: //www.shcus.gov.cn/apec/index.jsp.gov.cn/apec/index.jsp 转到 中华人民共和国上保 法律法规报关单填制通关代码商品归类暂定税率船舶动态下载中心 http: //www.shcus. gov.cn 会员登录1985~1989 用户名 手工与计算机并行运行 密码 登录注册1990~1994 为会员提供服务 ①提前报关信息查询 ②退税动态查询 计算机管理但没有标准化 ③在线业务咨询 ④关企论坛 ⑤邮件订阅 1995~1999 EDP发展到EDI标准化管理

COMP7880：E-Business Strategies Internal organization of e-business activities

• 中文电子书发展概况 Current situations of Chinese e-book development. • 中国的版权法规 Copyright law and regulations in China • 数字图书馆解决版权问题的主要挑战 Challenges in copyright clearance in digital library development • 网络传播权的基本解决方案 How to get permissions • 结束语 Conclusion