浅析计算机网络的安全与防范

随着互联网和计算机技术的快速发展和运用,我们留存在网上的重要信息越来越多,如何保障这些信息的安全就成为了一件急需解决的重要问题。论文就计算机网络安全技术及应对策略提出了一些观点和建议。     

虚拟局域网的划分和配置

该文叙述了VLAN技术的优点及划分方式,并以iSpirit3026、iSpirit 4508交换机为例给出了VLAN的配置实例,更好地解决网络冲突和广播风暴等问题,网络性能和安全性也得到了提高。     

信息技术课堂分层教学的实践与思考

新课程背景下的教学理念是“以学生发展为本”,在以机房环境为主的信息科技学科教学过程中如何关注每一位学生的有效学习,使他们的信息素养得到充份的发展对教师提出了相当高的要求。在教学各环节实施分层教学能体现教师对每一位学生的关爱,也能切实提高教学有效性。该文从关注每一位孩子的成长角度,简述了分层教学在初中信息科技学科教学中的实施策略及相关思考。     

海明码在视频水印中的应用

通过分析海明码的实现原理,设计一个基于海明码的视频7K印模型,并对诙模型进行程序验证。实验结果表明：基于海明码的视频水印方案能够有效提高7R印的可恢复性、顽健性、可升级性、适用性,但对视频面质有一定的影响。     

使用VB编程实现文件属性修改

分析了查看隐藏文件夹和设置文件夹属性的方珐．并在VB中得到了实现。     

基于元胞自动机的股票价格宏观变化的研究

为了研究股票价格在宏观上的变化趋势以及产生这些变化的主要因素.提出了一种新的基于元胞自动机的模型分析股票价格宏观变化,构建了新的股票价格变化规则以及新的股票交易量的变化模型,假设了两大类影响股票价格宏观变化趋势的肉素,同时也细化了股票交易量的函数.模拟了当影响因素都利好,影响因素都利空以及影响因素利好利空交替出现的情况下,股票价格在宏观上的变化情况.仿真结果在一定程度上模拟了股票价格的宏观变化情况和股票价格变化的波动壤集性,说明了假设的两大类因素的合理性以及演化模型的正确性.     

A strategic classification support system for brownfield redevelopment

Brownfield redevelopment (BR) is an ongoing issue for governments, communities, and consultants around the world. It is also an increasingly popular research topic in several academic fields. Strategic decision support that is now available for BR is surveyed and assessed. Then a dominance-based rough-set approach is developed and used to classify cities facing BR issues according to the level of two characteristics, BR effectiveness and BR future needs. The data for the classification are based on the widely available results of a survey of US cities. The unique features of the method are its reduced requirement for preference information, its ability to handle missing information effectively, and the easily understood linguistic decision rules that it generates, based on a training classification provided by experts. The resulting classification should be a valuable aid to cities and governments as they plan their BR projects and budgets.     

Inductive semimodules and the vector modules over them

The notion of an inductive semimodule over an ordered *-semiring is introduced and some related properties are investigated. Inductive semimodules are extensions of several important algebraic structures such as Kleene modules, Kleene algebras and inductive *-semirings. We prove that an inductive semimodule over an ordered *-semiring K is a Kleene module if and only if K is a Kleene algebra. Moreover, we establish that the vector module of an inductive semimodule over an ordered Conway semiring is again an inductive semimodule over the matrix semiring. Consequently, in an inductive semimodule over an ordered Conway semiring, least solutions to linear inequation systems can be denoted by linear expressions, avoiding the least fixed point operator. In addition, we also introduce a related notion called weak inductive semimodules, and propose several open problems on them.