3G时代第五媒体发展现状及趋势

随着新技术的日新月异,手机不再仅仅是一种通讯工具,更是作为一种媒介引起人们越来越广泛的关注,成为继报纸、广播、电视、网络媒体之后的第五媒体.文章主要以作为第五媒体的手机为研究对象,重点探讨其在3G时代这一特殊背景下的发展现状与问题,并对其发展趋势进行了预测.     

建立在De Bruijn图架构上的三维片上网络设计

提出一种基于De Bruijn图的新型三维片上网络架构方式,利用De Bruijn图直径短、路由简单及容错等特性,实现三维片上网络水平面网络和虚平面网络相结合的分层架构与容错路由算法。利用仿真,在均匀流量和热点流量模型下将该架构与传统架构进行仿真与性能比较,结果表明,与传统的3D_Mesh、XNoTs等架构相比,基于De Bruijn图的三维片上网络架构方式具有较小的网络平均延时与良好的可扩展性。     

循环经济视野下湖北省经济发展现状与对策分析

近年来,湖北省通过加强政府与企业合作,引导科技研发加快产学研结合,并积极发展社区试点探索经验,循环经济建设取得了初步成果,但是在治污方面还存在一系列问题。有鉴于此,湖北省亟需转变经济增长方式,构建绿色GDP核算体系,建立技术创新体系,加强环保宣传,建立市场机制导向下的循环经济发展模式。     

Subjective measures of risk aversion, fixed costs, and portfolio choice

The paper investigates risk preferences among different types of individuals. We use several different measures of risk preferences, including questions on choices between uncertain income streams suggested by Barsky, Juster, Kimball, and Shapiro (1997) and a number of ad hoc measures. As in [Barsky et al., 1997] and [Arrondel and Calvo-Pardo, 2002], we first analyze individual variation in the risk aversion measures and explain them by background characteristics (both “objective” characteristics and other subjective measures of risk preference). Next we incorporate the measured risk preferences into a household portfolio allocation model, which explains portfolio shares, while accounting for incomplete portfolios and fixed costs. Our results show that a measure based on factor analysis of answers to a number of simple risk preference questions has the most explanatory power. The Barsky et al. (1997) measure has less explanatory power than this “a-theoretical” measure, suggesting that sophisticated measures based on economic theory may exceed the financial capability of respondents. Fixed costs turn out to provide an economically and statistically highly significant explanation for incomplete portfolios.     

Urban Aboriginal use of fringe financial institutions: Survey evidence from Prince George, British Columbia

This paper analyses the use of fringe financial institutions (FFIs), such as payday loan and check cashing providers, by urban Aboriginal people based on a survey undertaken in Prince George, British Columbia. We found that 60% of FFIs’ clients surveyed self-identified as Aboriginal. Their characteristics, compared to the non-Aboriginal FFI clients, included having lower average incomes, lower levels of education, more likely to be female, a higher incidence of being unemployed, higher levels of financial exclusion, and less satisfaction with the service provided by FFIs. We find that government policy towards regulating the FFI industry is inadequate for meeting the basic financial needs of urban Aboriginal people.     

基于应力吸收层的旧水泥混凝土加铺层结构耦合应力分析

通过三维有限元数值模拟方法,分析了沥青加铺层厚度、模量,基础模量与应力吸收层厚度、模量对破碎后的旧水泥混凝土路面加铺层结构的荷载-温度耦合应力的变化规律.计算结果表明:适当增加加铺层的厚度对防止反射裂缝的产生是十分有效的;但不能用提高加铺层模量的方法来防止反射裂缝;适当控制基础模量可以防止反射裂缝的产生;适当提高应力吸收层的厚度对预防反射裂缝效果明显;提高应力吸收层的模量对预防反射裂缝效果不明显.     

胸腺嘧啶二醇脱氧核苷单分子糖苷键断裂的理论研究

采用理论计算方法对cis-(5S,6R)胸腺嘧啶二醇脱氧核苷(dTg)单分子糖苷键断裂的热力学和动力学性质进行了研究.在气相中,所有稳定点的几何构型都采用B3LYP/6-31+G(d,p)方法进行全优化,并利用导电极化连续模型对气相优化构型进行单点计算确定水的溶剂效应,作者主要考虑了直接断裂和抽氢断裂两条路径.计算结果表明:两条反应机理均涉及较高的活化能,从而说明单分子分解并不能促进糖苷键的断裂,该研究为生物体内这一重要反应提供了更多有用的信息.     

研究生英语精读教学探讨——以谭恩美《母语》的教学为例

精读课是研究生英语教学中一门重要的课程.以谭恩美的作品<母语>为教学实例,介绍如何依托课文,结合"3+3"的英语课堂教学模式,即"视、听、读"三种语言输入渠道,和"说、写、演"三种语言输出渠道相结合,开展多方位教学活动,培养非英语专业研究生的英语综合运用能力.     

对B_2H_6、B_3H_5和B_4H_6分子结构的对比研究

为了正确理解氢桥键的本质,采用MP2/6-31＋＋（D,P）方法对B2H6,B3H5和B4H6分子的结构进行了研究。比较了这3种分子中处于分子平面上下方的两个氢原子的距离变化引起的各原子带电情况的变化图和分子轨道图,结果显示,在某种程度上,B3H5和B4H6中分子平面上下方的两个氢原子具有类似B2H6分子中两个桥氢原子的性质,并在此基础上通过B2H6,B3H5和B4H6的分子轨道图得出了这3种分子中的氢桥键结构均可以看成π键电子云吸附两个带正电的质子构成的结论。     

Better know a Human Resource Development (HRD) scholar: a conversation with Robert (Bob) G. Hamlin

This article contains a conversation with Robert (Bob) G. Hamlin and is part of aseries that focuses on different human resource development (HRD) scholars. Theaim is to better understand the people behind the names we see in print and at HRD scholarly conferences. Bob is professor emeritus and chair of HRD at the University of Wolverhampton Business School, UK and a management and organization development consultant at Oaken Consultancy. Bob has spoken at many HRD conferences in Europe and the United States and was one of the founding members of the University Forum for HRD. The conversation explores Bob's career in HRD practice, research, teaching and management. Among the topics covered are the significance of practical experience and the influence it can then have on research, the power of evidence-based practice, and the need for HRD research to be seen as relevant and having utility within the world of practice.