Joint rate control and scheduling for wireless uplink video streaming

INTRODUCTION Video streaming is becoming one of the major driving forces of next generation wireless networks. For the currently deployed cellular networks, the practical data rates are not enough to support full rate, high quality video applications. As a result, many research efforts have been devoted to adapting video content to reconcile the conflict between the high demand of video quality and the limited wireless communication resources among users. A large body of literature utiliz…     

高校学术创新团队建设应注意的问题

高校科技要出更多的原创性科研成果，就必须抓住机遇，建设强有力的学术创新团队。因此，目前学术创新团队的建设已成为高校十分重要的任务和目标。处理好学术创新团队的定位、人员组成、团队文化等问题是学术创新团队建设成功的关键。     

A narrative inquiry into the fostering of a teacher-principal’s best-loved self in an online teacher community in China

This study revolves around an organically lived online community of Chinese elementary teachers. The teachers shared their reflective journals and engaged in conversations with the facilitators and also with their peers. Following one participant’s postings over a span of thirteen months helped the research team to narratively explore how the teacher, through reflections and interactions with his other fellow community members, refined his personal practical knowledge and cultivated his best-loved self as a teacher-principal in a rural school in China that lacked learning resources. Highlighted in the discussions are how the participant integrated his personal being with his professional being and eventually became the teacher he wanted to be. This research study adds to the literature about teachers as agents of change. This knowledge contribution, among others related to technology, shows how professional development and the development of teacher identity can be promoted in online teacher knowledge communities. Implications for teacher education are also discussed.     

彭桂萼边疆史地研究的学术思想特点

彭桂萼的边疆论著,是当前研究西南边疆有价值的历史资料之一,也是云南的重要文献之一。他的研究克服了前代学者研究滇西南囿于书本的局限,以实地履勘与文献考证相结合,著述真实可信。综观他的边疆论著,具有明显的爱国爱乡的思想倾向;实地调查,创新体例;认清边疆形势,加强边防建设;风土人情,记载周详的特点。     

How does task switching affect arithmetic strategy use in children with low mathematics achievement? Evidence from computational estimation

European Journal of Psychology of Education - Although an increasing number of studies have suggested that students with low mathematics achievement (LMA) tend to perform worse in arithmetic...     

安徽省高职毕业生就业机制调研

自1999年开始,一直稳步发展的安徽省高等职业教育实现了跨越式发展.到2005年,安徽省省属79所普通高校有毕业生11.9万人,其中高职院校毕业生约有6.8万人,比2004年增加2.9万,增幅32%,高于全国平均增幅11.49个百分点,就业形势依然严峻.     

数据库的几种安全控制方法

针对数据库安全问题,讨论了相关的安全控制方法,如自主存取控制、强制存取控制、基于角色存取控制、视图机制、审计日志、加密控制和推论控制等等,并对数据库安全给出了一些具体建议。     

企业感性经营策略

随着小康社会的实现，人们的消费也从理性消费进入感性消费阶段。这首先已在享受类和舒适类消费品中得到体现，并呈加速发展的趋势。我国企业应因势利导，开发感性商品，提供感性服务并采取感性销售措施，方能赢得消费的好感，取得市场竞争的有利地位。     

当代大学生实用主义价值观产生的原因探析

当代大学生实用主义价值观的形成主要由以下几个因素造成的:思想政治教育严重弱化,社会上功利主义倾向在大学生中引起共鸣,社会转型期中的校园文化的影响,学习压力、经济压力、就业压力的加重,市场经济负面的影响,传播媒介错误的导向,知识经济的影响,大学生思想不成熟等。上述因素为实用主义价值观在当代大学生这个特殊群体中泛起提供了可乘之机。     

天目山植物分类、查询和鉴别专家系统的构建

本文针对植物学野外实习中存在植物鉴别难的问题,试构建专家系统来提高鉴别植物的效率。