Hybrid ants-like search algorithms for P2P media streaming distribution in ad hoc networks

Media streaming delivery in wireless ad hoc networks is challenging due to the stringent resource restrictions,po-tential high loss rate and the decentralized architecture. To support long and high-quality streams,one viable approach is that a media stream is partitioned into segments,and then the segments are replicated in a network and served in a peer-to-peer(P2P) fashion. However,the searching strategy for segments is one key problem with the approach. This paper proposes a hybrid ants-like search algorithm(HASA) for P2P media streaming distribution in ad hoc networks. It takes the advantages of random walks and ants-like algorithms for searching in unstructured P2P networks,such as low transmitting latency,less jitter times,and low unnecessary traffic. We quantify the performance of our scheme in terms of response time,jitter times,and network messages for media streaming distribution. Simulation results showed that it can effectively improve the search efficiency for P2P media streaming distribution in ad hoc networks.     

试论“两个务必”与新时期党的建设

胡锦涛总书记要求全党同志牢记“两个务必”,具有十分重要的现实意义和长远的指导意义,为推进新时期党建工作提供了新的动力和方向。“两个务必”凝结着我们党领导中国革命、建设和改革的深刻历史经验,是实现党的目标和宗旨的内在要求。我们必须认真践行“两个务必”,把讲话精神真正贯彻落实到各项工作中去。     

学习实践“三个代表”重要思想加强高校领导班子和各级干部队伍建设

江泽民同志“三个代表”的重要思想,是加强党的建设的行动纲领,也是新形势下加强高校领导班子和各级干部队伍建设的必然要求,长期以来,高校领导班子和各级干部在推进高校的改革发展建设方面做出了较大贡献,但面对新世纪、新形势、新情况,新任务,他们还存在一些与改革,发展,建设不相适应的问题,必须认真学习实践“三个代表”重要思想,全面加强领导班子和各级干部队伍的思想,政治,组织和作风建设,只有这样,才能更好地肩负起时代的重托。     

谈如何做好高校学生干部的培养工作

做好学生干部培养是高校学生管理工作中非常重要的一个环节 ,本文结合作者实际工作中的一些经验 ,重点介绍了如何做好学生干部培养工作     

科技期刊审稿专家的评价和改进措施

【目的】通过对审稿专家的评价进而提出优化审稿专家的措施。【方法】 选取《中华微生物学和免疫学杂志》2011—2015年267位审稿专家7756条审稿记录,统计267位专家的审稿数量、审稿时滞及审稿结论。【结果】 通过统计和分析,5年间审稿篇次>31篇的66位专家是期刊的核心审稿专家,其中,审稿时滞在3周以内的专家占92.5%;审稿时滞上,就所有专家而言,74.2%的能在3周内审回稿件;审稿结论上,拒审占5.0%,无具体审稿意见或审稿意见过简无针对性的占10.5%。【结论】 要保证期刊的核心专家队伍,必须从专家和编辑两个层面进行改进。对专家适当取舍,保证核心审稿专家的数量;同时编辑应做好服务工作,重视专家的知识回报。     

竹林七贤的几个基本问题

竹林七贤得名的缘由、过程,竹林七贤的性质和领袖等基本问题都是应重新探讨的问题。竹林"七贤"的由来不是《论语》"作者七人",而是汉末"七贤";竹林七贤的得名经历了从竹林之游、竹林名士到竹林七贤的历史过程;竹林七贤是在阴谋集团篡国夺权形势下知识分子避世隐居的集团,七贤的中心是嵇、阮、山三人,而领袖是嵇康。     

Why do UK academics become Associate Deans and what are their future career plans?

The role and number of Associate Dean posts in UK universities has grown considerably in recent years. Despite this, relatively little is known about the reasons why individuals take on such roles and how it fits into their career trajectories. The purpose of this article is to explore these issues by drawing on data from the first national study of Associate Deans in the UK. Adopting a two-staged mixed methods approach, data were collected from semi-structured interviews (n = 15) and an online survey (n = 172). The findings suggest that academics take on the role for a number of reasons such as the challenge of working across the University, making a difference to staff and students, or being asked to take it on by a senior member of staff. It is argued that these Associate Dean roles are part of new and emerging academic career pathways within the higher education sector.     

Transitioning from practicing teacher to teacher leader: a case study

Given US students’ lack of international competitiveness in mathematics and science, many states have adopted the Common Core State Standards for Mathematics (CCSSM). To help ensure that the Standards for Mathematical Practice within the CCSSM and effective teaching practices are implemented appropriately, many teachers are emerging as teacher leaders with the intent of supporting teachers with this implementation. Unfortunately, not all of these teachers are necessarily prepared in the field of teacher leadership. Recognizing the importance of having well-prepared teacher leaders, this article describes the case of Ms. Hodges, as she transitioned from mathematics teacher to teacher leader. Data revealed that several factors affected Ms. Hodges’ transition, some positively and others negatively. These results as well as implications for teacher leader development are provided.     

高校学生干部队伍建设新探

学生干部队伍建设的好坏直接影响高校学生工作的成效。如何建设一支高效精干的学生干部队伍是辅导员的首要工作。学生干部的选拔是前提,培养是关键,管理是保障,这三个环节是高校学生干部队伍建设的核心,本文对这个核心进行了新的诠释。     

领导干部人格特质与管理能力类型的现状调查——以大连市局、处、科级公务员为中心

采用分层随机抽样的方法,运用16PF和霍兰德职业倾向测试对198名公务员暨局、处、科领导干部进行了调查。结果显示,领导干部人格特质总体优异,高于全国其他人群的调查结果,而且心理健康水平较高;科、处、局三级领导干部中,综合人格特质处级领导干部与其他两个级别比较差异显著;领导干部特殊人格特质中,心理健康因素优异,高于全国其他人群,而其他三个人格因素与其他人群相比较则有高有低;处级领导干部在专业有成就水平、新环境成长能力方面与其他两个级别差异显著;领导干部的职业类型为社会型、调研型、企业型、实际型,范围大,能力高;处级干部的调研型、企业型得分与其他两级别比差异显著。