基于Adhoc能量均衡的AODV协议改进

针对Adhoc网络中移动节点能量受限的问题,考虑节点剩余能量和节点能量消耗速率两方面因素,对AODV协议,在选路机制,hello机制几个方面作了改进,改进后的路由协议能够有效均衡负载,保护低能量节点,延长网络生存时间。     

Pathogenic organization in science: Division of labor and retractions

Science is increasingly a team activity, and the size of the teams has been growing. At the same time, there are concerns about an increasing rate of pathologies in science. The growth of team science suggests the need to look beyond individual-level explanations and focus on organizational structures and institutional contexts to explain pathologies in science. Drawing on the literature on organizational pathologies, we argue that division of labor may be a key factor contributing to pathologies in science. Furthermore, we examine the effects of high-stakes incentives and of institutional corruption as additional predictors of scientific pathologies. Using retractions as an indicator of pathologies, and drawing on a matched sample of 195 retracted papers and 349 paired papers that were not retracted, we develop indicators of the division of labor in the team that produced a paper and find that the rate of retractions is higher as the division of labor increases (net of team size). Additionally, we find that high-stakes incentives and institutional corruption are also associated with increased retractions. We conclude with a discussion of the implications of these findings for science policy, in particular for organizing team science projects.     

跨层带宽预留保证机制研究

应用跨层设计的思想,提出了一种结合网络层和MAC层的跨层带宽预留保证机制——邻居预留（NR,Neighborhood Reservation）,以减轻Ad Hoc网络中由于相邻节点在MAC层的信道竞争,对带宽预留产生的影响。     

An effective connected dominating set based mobility management algorithm in MANETs

This paper proposes a connected dominating set （CDS） based mobility management algorithm, CMMA, to solve the problems of node entering, exiting and movement in mobile ad hoc networks （MANETs）, which ensures the connectivity and efficiency of the CDS. Compared with Wu＇s algorithm, the proposed algorithm can make full use of present network conditions and involves fewer nodes. Also it has better performance with regard to the approximation factor, message complexity, and time complexity.     

高阶常系数非齐次微分方程特解的求法

针对在高等数学的其它分支及相关学科中常常出现求解高阶非齐次线性微分方程的问题,首先采用分部积分法来求常系数高阶非奇次线性微分方程的解,然后通过变换y=ze^λx,得出了一类高阶常系数微分方程的特解的简便方法．     

Gender and IT in the Household: Evolving Patterns of Internet Use in the United States

Information technology (IT)—computers and related technologies—is the latest technology to enter the household. Like other technologies, gender is a major factor in its adoption and use as well as its perceived usefulness. Unlike prior household technologies, the computer's entry into the household has followed a different pattern. Early statistics revealed a vast gender divide, with men using computers and related technologies much more in the household. More recent statistics show a narrowing of the divide, perhaps even a reversal, particularly in the United States, with women outnumbering men in the access to and use of the Internet. In this article, the role of gender and its relationship with Internet use in the home are reviewed. In addition to overall adoption and access, the review focuses on specific Internet applications and examines the factors that contribute to gender differences in adoption and use of computers and Internet applications in the home.     

基于混合光纤同轴接入网的视频点播实现

本文介绍了混合光纤同轴接入网（HFC,hybrid fiber coax）技术的原理,在有线电视网络中视频点播（VOD,Video On Demand）系统的结构模式与应用,视频点播系统的结构及组成,阐述了在视频点播（VOD）业务方面HFC技术的应用以及如何利用有线电视网络实现视频点播,并针对这些技术提出了对我院有线电视网络改造成为基于HFC的VOD系统的构想,以及讨论了目前基于HFC的VOD系统存在的问题以及未来发展前景.     

兄弟分家与"狗耕田"--一个中国民间流行故事类型的文化解析

"狗耕田"故事是分布广泛、深受广大民众喜爱的一个故事类型.它从兄弟分家讲起,以弟弟分得的狗能耕田创造奇迹为核心母题.兄弟分家支配着故事形态的演变,关于兄弟间均分家产这一制度、习俗是它构成和流行的社会文化基础,在口头传承中起着教育青少年维护这一社会规范的作用.海峡两岸的兄弟分家故事和日、韩相关故事的差异,表现出不同的民族文化特征.     

基于Google Earth的车辆防碰撞虚拟仿真系统

车载自组织网络（VANET）是近年来智能交通领域的研究热点之一。在VANET网络中,智能车辆通过交互共享道路环境信息,可提高交通安全水平。在现实环境中进行大规模的车载自组织网络实验,在经济性和可行性上都具有较大困难。在SUMO交通仿真基础上开发出车辆防碰撞虚拟仿真系统,通过Google Street Map获取真实道路环境（如路网、楼宇、植被等）,并结合 GEMV2软件对智能车辆在真实道路环境下的无线通讯链路质量进行评估,实现了虚拟行车交通流与车辆间无线通讯质量评估两位一体的模拟仿真,增强了车辆对周围道路交通环境的综合感知能力。     

课题组内部分工合作的实现机制

课题组内部分工合作的成败得失,对一个科研计划项目的完成质量具有决定性的作用,但其重要性并没有得到足够重视。本文通过分析提出了课题组内部分工合作的实现机制,即:通过倡导和宣扬追求科学的精神,改变以排名先后顺序评价科研人员的做法,对科研人员的研究工作积累和成败得失进行综合考察,延伸管理链条,形成三级管理模式,提高课题主持人的管理素质和管理者意识以及课题组成员的责任意识,营造良好的外部环境;通过处理好课题组成员的个人关系,搭配合理的知识结构,结合课题组成员的个人兴趣安排任务分工,形成良好的团队结构;通过合理的分权,及时有效的沟通,轻松愉快的学习,做好团队管理;进而实现课题组内部的分工合作,提高科研工作效率,加快科研产出,推动我国科技事业的发展。