关键词： 经济模型   区分服务   IDC   Web   hosting  

摘要： Web区分服务研究已经成为电子商务应用中的重要课题,基本思想是为高优先级用户提供更好的服务。该文基于经济模型给出另一种形式的Web区分服务,并用来解决IDCWebhosting中用户资源的优化配置。

关键词： network management   pricing   quality-of-service   cellular network   bandwidth allocation  

摘要： In this paper, we study the connection between radio resource management (RRM) and economic parameters, whose application in multimedia communication system is a challenging task. In fact, a real network provider has to consider other parameters, besides the common goals of RRM like throughput maximisation or meeting constraints connected with the quality of service. In particular, when the financial needs of the provider and the reaction of the users to prices are taken into account, economics have to be introduced in the analysis. We intend to study multimedia communication systems by including well-known economic models and reasonable considerations in the usual radio resource allocation scenario. To do this, we present a model of users' satisfaction, which considers the effects of both users' request and price paid. In this way, it is possible to investigate the relationship between the radio resource allocation and the provider revenue. Other conclusions can be derived as well, e.g. for the pricing strategy planning or the network dimensioning. Thus, we give analytical insight and numerical results, which highlight that the network management is heavily affected by the economic scenario. (C) 2004 Elsevier B.V. All rights reserved.

关键词： 经济模型   资源调度   资源提供者   价格和时间综合最优调度  

摘要： 为对资源进行有效管理和调度,分析了网格资源管理领域目前已有的经济学模型资源分配框架,给出了经济模型中价格机制的形式化描述.参考Buyya提出的调度策略,在综合考虑成本价格和作业执行时间的基础上,提出了经济模型下基于时限预算和作业价格预算的成本和时间综合最优调度(STPP)策略和一种获取价格的迭代算法.研究表明,STPP策略增强了资源调度的灵活性和可扩展性.

关键词： 网格   服务质量   计算经济   经济模型   账号模板   缓存表   特权周期  

摘要： 随着网格计算环境的逐渐完全开放,将会有成千上万的人越来越热衷于使用网格环境中的资源.虽然目前的网格体系已初步解决了不少问题,如安全、统一获取、资源管理、调度和应用合成,但是关于网格中的计算经济问题仍还很不完善,同时随着网格计算经济的日益发展,账号的分配问题也越来越突出.该文提出了一种根据用户QoS来选择经济模型的方法,使得新的网格体系能够适用于各种不同的经济模型,并结合了现有的一些计算经济网格技术,给出了一个比较完善的计算经济网格体系结构.同时对计算经济网格中的账号分配问题进行了深入的研究,通过引入缓存表机制,克服了现有账号模板分配方法中无法对用户进行分类服务的缺点,得到了一个更加有效的账号模板分配方法,并通过理论证明了其性能比原账号模板分配方法有了显著的提高.

关键词： self-employment   developing countries   Nicaragua   LSMS  

摘要： Using data from the 1993 and 1998 Nicaraguan Living Standards Measurement Survey, this paper analyses the desirability of self-employment for Nicaraguan men and women over two points in time in a changing economic environment characterized by market-based reforms called the New Economic Model. Switching regressions of the self-employed and waged and salaried sectoral choice suggest that experience is the major determinant of self-employment for both Nicaraguan men and women. Mixed findings are reported for sectoral selection Suggesting that the self-employed men, depending upon current economic conditions, may alternate back and forth between the sector (self-employment or waged and salaried employment) with the highest returns. For women, improvement in economic conditions reflected negative selection in both sectors suggesting that much of the economic gains in the 1990s accrued to men.

关键词： energy technology   climate change   general equilibrium modeling  

摘要： The rate and magnitude of technological change is a critical component in estimating future anthropogenic carbon emissions. We present a methodology for modeling low-carbon emitting technologies within the MIT Emissions Prediction and Policy Analysis (EPPA) model, a computable general equilibrium (CGE) model of the world economy. The methodology translates bottom-up engineering information for two carbon capture and sequestration (CCS) technologies in the electric power sector into the EPPA model and discusses issues that arise in assuring an accurate representation and realistic market penetration. We find that coal-based technologies with sequestration penetrate, despite their higher cost today, because of projected rising natural gas prices. (C) 2004 Elsevier B.V. All rights reserved.

关键词： 宏观经济模型   极限特征   投入产出分析法   非负不可约方阵   正特征矢量法  

摘要： 利用投入产出分析法建立了一类动态宏观经济模型 ,讨论了在生产增长的条件下 ,当规划期足够长时 ,有消费的经济系统中 ,投入、产出和消费之间的关系及其极限特征 .说明了 :系统的初始投入不一定是直接消耗系数矩阵的正特征矢量 .并且 ,在经济不出现危机的条件下 ,系统以稳定状态增长 ,呈现大道性质 .

关键词： 算法   风险度量   证券投资风险   测度研究   DEA   定价模型   经济模型   不完全信息   祁明德   博弈分析   数学模型   试验模型   模型研究   单机排序   李纯青   多重休假   实证研究   李一   目次  

关键词： 证券投资   股票价格   经济模型  

摘要： 基本面因素、技术面因素、热点信息的转换和各种板块的创立 ,通过复杂交互作用影响股价的波动。利用统计分析方法 ,考察并确定与上市公司股价之间的基本关系因素 ,建立股票定价基本模型 ,就绩优股、业绩较优股、业绩较差股、绩差股进行实证研究 ,判断出沪市股票定价的基本趋势 。

关键词： 矿床数学经济模型   矿产经济   资源合理利用   老矿山成矿预测  

摘要： 文章介绍了自主研制的矿床数学经济模型软件包,完成了国内13个矿山的矿床数学经济模型研究,在技术上解决了矿山生产动态管理,矿山生产规划,生产方案与系统优化决策,资源的合理开发利用,矿床边部、深部找矿预测等问题,从而提高了矿业开发的社会经济效益。