Approach Infer a language model for each document. Estimate the probability of generating the query according to each of these models. Rank the documents according to these probabilities. Usually a unigram estimate of words is used. LM approach asss
ORACLE函数大全 ________________________________________ 作者：[本站编辑] 来源：[CSDN] 浏览：[ ] SQL中的单记录函数 1.ASCII 返回与指定的字符对应的十进制数; SQL> select ascii('A') A,ascii('a') a,ascii('0') zero,ascii(' ') space from dual; A A ZERO SPACE --------- --------- --------- ----
表1 J2EE与.NET架构比较 架构 比较项 J2EE .NET 通信协议 Remote Method Invocation over Internet InterOrb Protocol (RMI/IIOP) XML 编程语言 Java C#，VB.NET，COBOL等 运行时环境 Java Virtual Machine (JVM) Common Language Runtime (CLR) 胖客户端 Java Swing Windows Forms 目录服务 Java Naming a
EL全名Expression Language
EL 语法结构：
${ session.user.sex};所有EL都是以${为起始以}为结尾的；
上述语句等同于User user = (User)session.getAttribute(“user”);String sex=user.getSex();
即在session中取出user对象中的属性；
