5.1 客户端编程与脚本程序语言 5.2 JavaScript脚本语言概况 5.3 JavaScript基础 5.4 事件驱动及事件处理 5.5对象及其操作 5.6 常用内部对象及函数

背景 标记语言是Web应用的基础,标记语言是由内 容和标记组成的,标记指定了内容在浏览器中 的显示形式。在Web应用中,所有的Web页面都 是以标记语言书写的具有特定格式的文档。因 此,无论是Web应用还是开发,都应该对标记 语言有一个基本的认识

Photoshop是一个非常优秀的图像处理软件，是Adobe公司的产品，具有强大的图像处理功能，在传统的印刷业、平面广告业中具有相当重要的地位。Photoshop是一个用起来非常得心应手的图像处理软件，但一些初学者往往以为它很专业，有点“敬而远之”，而宁愿用Windows中的图画板

a weakness of hashing Problem: For any hash function h, a set of keys exists that can cause the average access time of a hash table to skyrocket An adversary can pick all keys from tkeU: h(k)=i for some slot i IDEA Choose the hash function at random independently of the keys

1.1电子商务的含义 1.2电子商务形成和发展 1.3电子商务的特征 1.4电子商务的应用与影响 1.5电子商务的法律法规 1.6电子商务的应用分类 1.7电子商务的应用基础 1.8电子商务在中国

flow networks Definition. A flow network is a directed graph G=(, E)with two distinguished vertices:a source s and a sink t. Each edge(u, v)E E has a nonnegative capacity c(u, v). If(u, v) E, then c(u, v)=0 Example: c 2001 by Charles E Leiserson

Recall from lecture 22 °Flow value:f=f(s,V) Cut: Any partition (S, T)of y such that s E S andt∈T Lemma. f=f(s, T) for any cut(S, T) Corollary. f(s, T) for any cut(S, T) Residual graph: The graph G=(v, ef) with strictly positive residual capacities c u, v) c(u,)-f(2y)>0

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

How fast can we sort? All the sorting algorithms we have seen so far are comparison sorts: only use comparisons to determine the relative order of elements E. g, insertion sort, merge sort, quicksort heapsort The best worst-case running time that weve seen for comparison sorting is O(nIgn) Is o(nlgn) the best we can do?

信息安全的概念 信息安全发展历程 信息安全技术体系 信息安全模型 信息安全保障技术框架