基于 Activiti 流程管理关键技术设计与实现

Activiti 是用于管理业务流程的工作流引擎,它的使用降低了复杂业务流程开发与维护的难度。但在实际应用中,流程节点无法自由跳转,给管理和使用带来诸多不便。本文研究了 Activiti 中的系统框架和接口,基于现有接口设计实现了流程节点自由跳转功能,并进行了框架整合。测试结果表明,该功能满足各项既定功能需求,具有一般性,可满足实际工作中相关要求。     

A genetic fuzzy system based optimized zone based energy efficient routing protocol for mobile sensor networks (OZEEP)

Wireless sensor networks have become increasingly popular because of their ability to cater to multifaceted applications without much human intervention. However, because of their distributed deployment, these networks face certain challenges, namely, network coverage, continuous connectivity and bandwidth utilization. All of these correlated issues impact the network performance because they define the energy consumption model of the network and have therefore become a crucial subject of study. Well-managed energy usage of nodes can lead to an extended network lifetime. One way to achieve this is through clustering. Clustering of nodes minimizes the amount of data transmission, routing delay and redundant data in the network, thereby conserving network energy. In addition to these advantages, clustering also makes the network scalable for real world applications. However, clustering algorithms require careful planning and design so that balanced and uniformly distributed clusters are created in a way that the network lifetime is enhanced. In this work, we extend our previous algorithm, titled the zone-based energy efficient routing protocol for mobile sensor networks (ZEEP). The algorithm we propose optimizes the clustering and cluster head selection of ZEEP by using a genetic fuzzy system. The two-step clustering process of our algorithm uses a fuzzy inference system in the first step to select optimal nodes that can be a cluster head based on parameters such as energy, distance, density and mobility. In the second step, we use a genetic algorithm to make a final choice of cluster heads from the nominated candidates proposed by the fuzzy system so that the optimal solution generated is a uniformly distributed balanced set of clusters that aim at an enhanced network lifetime. We also study the impact and dominance of mobility with regard to the variables. However, before we arrived at a GFS-based solution, we also studied fuzzy-based clustering using different membership functions, and we present our understanding on the same. Simulations were carried out in MATLAB and ns2. The results obtained are compared with ZEEP.     

Google and Privacy

Abstract

Google has emerged as the preeminent Internet search engine, but more important, it has achieved an iconic status. It is solidly entrenched in our language and popular culture. But there is a darker side to Google. Google collects personal information about its users, and it aggregates third party information more effectively than many third world governments. While there has been no abuse (that we know of) by Google of personal information, that potential exists, and there are numerous instances of third parties using Google to aggregate personal information for dubious purposes.     

基于主题深度搜索的数学领域教育平台研究

论文综合利用主题搜索技术、深网信息集成技术和Wiki技术,设计并实现了一个面向数学领域的教育平台.此平台是一个集数学资源共享和用户交流的开放平台,用户在此平台可以利用数学Wiki添加、编辑、评论数学领域信息,提升自主学习能力,实现广泛交流.同时,还能利用数学搜索引擎搜索到专业的数学知识,定制URL检索,扩大检索范围,提高了平台的个性化服务水平及搜索的准确率.实验结果表明,文中基于SVM分类算法的数学主题网页分类器具有较高的准确率和召回率.     

基于协议分析的入侵检测模块的设计与实现

论文分析了人侵检测技术的协议分析技术,并将协议分析技术用于入侵检测模块中,提高了模块的检测速度和准确率,使整个模块的整体性能都得到提高。论文将协议分析和模式匹配有机地结合起来,用于入侵检测模块中,还分析了两种响应技术：被动响应和主动响应。     

OpenStack Heat与企业应用部署

OpenStack Heat在开源应用的部署上有很大优势,但在企业应用部署方面有不少问题。本文罗列这些问题．并就其中的一部分给出解决方案,对尚无成熟解决方案的问题努力使其明朗化。     

搜索引擎系统：UML/OCL模型驱动开发

介绍一个搜索引擎系统的开发。运用UML用例图做系统的需求分析,运用UML类图、状态图、包图进行系统设计。以OCL表达式丰富状态图。使用C#语言和ASP.NET编程,SQL Server存储信息,系统运行在微软.NET环境上。遵循面向对象方法,如逐步求精和模块化,建立UML/OCL模型、组织程序,将系统逐层分解成具有特定功能的模块。系统由收集器、索引器、检索器三大部分组成,分别负责数据收集、数据分析和索引构建、用户检索接口。论文报告系统分析、设计和实现的思想和过程。     

面向安全生产综合监管系统的工作流引擎

针对安全生产监管系统中关键业务应用的开发离不开工作流技术支持的特点,通过对安全生产监管领域中关键业务的实际开发需求的分析,引进了工作流技术,设计并实现了一个轻量级嵌入式工作流引擎;本文首先对安全生产综合监管系统整体架构进行分析,然后提出该工作流引擎的设计方案,并详细阐述了引擎设计的关键环节;最后把此工作流引擎应用到安全生产综合监管系统中,不仅显著地缩短关键业务的开发周期,同时也规范了各种关键业务处理流程。     

垂直搜索引擎的构建与应用

本文首先分析了互联网搜索引擎的现状,而后对垂直搜索引擎进行了系统设计,并阐述了系统实现的要点,最后对垂直搜索引擎的应用和特点做了总结,对读者了解垂直搜索引擎的概念和实现原理有一定现实意义。     

搜索引擎在学术期刊编辑工作中的作用与应用策略

本文通过阐述分析网络信息资料库的特点,讲述了学术期刊编辑如何使用搜索引擎来更简单方便的检索工作所需要的信息,并点明了在使用搜索引擎时应注意的问题,从而使编辑在工作中减少无用功,提高工作效率。