共查询到20条相似文献，搜索用时 62 毫秒
1.
文章以某电力管理系统为背景，通过对多层应用系统安全管理机制以及RBAC安全性能的分析，提出了一种基于角色的访问控制在多层应用系统中的应用方案，有效实现了多层应用系统前后台之间的安全访问控制的统一，全面增强了系统安全管理的性能。 相似文献
2.
3.
为实现Web系统的安全性,结合汽车租赁管理信息系统,提出了一种安全方案,包括数据安全访问控制,Web页安全访问控制和数据库的备份与还原;该方案在应用中取得了良好效果,提高了系统的安全性。 相似文献
4.
在等级系统中，用户以及他所拥有的信息严格分成若干个安全等级，这种中的访问控制问题非常重要。文章提出了等级系统中的一个访问控制方案，该方案普遍适用于各种等级系统，具有很强的安全性，并且允许所有用户自主地选择自己的秘密密钥。 相似文献
5.
本文的研究目标是解决校园网上的用户身份认证及资源访问控制方案的设计和实施问题,说明了研究访问控制的必要性。详细讨论了实际应用中存在的动态授权与授权委托的需求的解决方案。 相似文献
6.
7.
介绍了常用的访问控制模型,提出了基于角色访问控制模型与MVC模式相结合的访问控制模型。实践表明,该方案具有良好的扩展性、适应性和灵活性,能够有效地实现访问控制目标。 相似文献
8.
本论研究整合基于角色与基于任务的访问控制模型及其在电子政务系统中的应用。基于角色的访问控制模型(Role-Based Access Control，简称RBAC)缺乏实际应用中工作流程的体现，所以本论以RBAC为基础，结合了强调工作流程的基于任务的访问控制模型(Task-Based Access Control，简称TBAC)，提出一种新的整合型访问控制模型，并以其在电子政务系统中的实际应用为例分析说明了该模型解决职责分离、工作顺序扣工作相依性问题的具体策略。 相似文献
9.
随着计算机应用的日益普及,特别是网络的迅速发展,如何在发展和推广网络应用的同时进一步提高访问控制的安全与效率,已经成为目前网络界所必须研究和解决的课题。针对不同应用的授权管理,需要根据项目的实际情况和具体架构,在维护性、灵活性、完整性等N多个方案之间比较权衡,选择符合的方案。目前的授权管理一般有三种:1.自主型访问控制方法。目前在我国的很 相似文献
10.
邹军华 《中国教育技术装备》2005,(12):36-38
针对Web应用的访问控制一般方法的不足，分析了通过IP范围的限制，用VB．Net在网页代码中实现Web应用的访问控制的思路。并且给出了实现的源代码。 相似文献
11.
罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
12.
Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
13.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
14.
15.
16.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
17.
陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
18.
邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
19.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献