Information content of a random variable Random variable x Outcome of a random experiment Discrete R V takes on values from a finite set of possible outcomes PMF: P(X=y)=Py) How much information is contained in the event X=y? Will the sun rise today Revealing the outcome of this experiment provides no information Will the Celtics win the NBa championship? Since this is unlikely, revealing yes provides more information than revealing Events that are less likely contain more information than likely events

1.指令用法 (1)SET(置位):置位指令 (2)RST(复位):复位指令 用于各继电器Y、S和M等,置位和复位,还可在用户程序的任何地方对某个状态或事件设置或清除标志

实验11参考答案 一、 SET TALK OFF CLEAR USE XSDA. DBF ACCEPT请输入待查学生姓名:”TO NAME LOCATE FOR姓名=NAME IF FOUNDO

天津大学：《数据结构 Data Structures》课程PPT教学课件（英文版）CHAPTER 8 THE DISJOINT SET ADT

Unit 7 The Fundamentals of computer Software Text 1 Data Structure A data structure is a data type. Its values are composed of component elements that are related by some structure Since a data structure is a data type, it has a set of operations on its values. In addition, there

Semantic analysis Parsing only verifies that the program consists of tokens arranged in a syntactically-valid combination, we now move on to semantic analysis, where we delve deeper to check whether they form a sensible set of instructions in the programming language

*9.1 网络安全问题概述 9.1.1 计算机网络面临的安全性威胁 9.1.2 计算机网络安全的内容 9.1.3 一般的数据加密模型 *9.2 常规密钥密码体制 9.2.1 替代密码与置换密码 9.2.2 数据加密标准 DES *9.3 公开密钥密码体制 9.3.1 公开密钥密码体制的特点 9.3.2 RSA 公开密钥密码体制 9.3.3 数字签名 *9.4 报文鉴别 *9.5 密钥分配 9.6 电子邮件的加密 9.6.1 PGP 9.6.2 PEM 9.7 链路加密与端到端加密 9.7.1 链路加密 9.7.2 端到端加密 9.8 因特网商务中的加密 9.8.1 安全插口层 SSL 9.8.2 安全电子交易 SET 9.9 因特网的网络层安全协议族 IPsec *9.10 防火墙

8.1 政务电子公文流转安全协议 8.2 安全电子交易协议SET 8.3 安全套接层协议SSL 8.4 IP Sec 8.5 VPN技术

相律 Phase Rules Phase diagrams are extremely useful for systems with multiple components, and serve to describe physical and chemical equilibria over range of different compositions, as well as points where substances are mutually miscible, or even when a system has to be brought to a specific set of conditions for equilbrium to exist(e.g., pressure

simple counters Counting is a fundamental function of digital circuits. A digital counter consists of a collection of flip-flops that change states (set or reset) in a prescribed sequence