建设项目后评价工作程序设计

按照动态控制原理,从实操的角度出发,设计建设项目后评价工作程序框图。针对程序框图中“确定后评价目标及内容”、“制定后评价计划”、“收集实际数据”等后评价工作内容,进行重点讨论。     

GIS 在物流中的应用

介绍地理信息系统(GIS)在物流中应用的基本原理，指出了GIS在物流中应用的几个方面，以及在其要解决好的几个问题。     

Remaining life estimation of used components in consumer products: Life cycle data analysis by Weibull and artificial neural networks

Environmental awareness and legislative pressures have made manufacturers responsible for the take-back and end-of-life treatment of their products. To competitively exploit these products, one option is to incorporate used components in “new” or remanufactured products. However, this option is partly limited by a firm's ability to assess the reliability of used components. A comprehensive two-step approach is proposed. The first stage phase statistically analyzes the behavior of components for reuse. A well-known reliability assessment method, the Weibull analysis, is applied to the time-to-failure data to assess the mean life of components. In the second phase, the degradation and condition monitoring data are analyzed by developing an artificial neural network (ANN) model. The advantages of this approach over traditional approaches employing multiple regression analysis are highlighted with empirical data from a consumer product. Finally, the Weibull analysis and the ANN model are then integrated to assess the remaining useful life of components for reuse. This is a critical advance in sustainable management of supply chains since it allows for a better understanding of not only service requirements of product, but the remaining life in a product and hence its suitability for reuse or remanufacture. Future work should assess: (1) reduction in downtime of process equipment through the implementation of this technique as a means to better manage preventative maintenance; (2) reduce field failure of remanufactured product; (3) selling-service strategy through implementation of the proposed methodology.     

Bayesian life test planning for the Weibull distribution with given shape parameter

This paper describes Bayesian methods for life test planning with Type II censored data from a Weibull distribution, when the Weibull shape parameter is given. We use conjugate prior distributions and criteria based on estimating a quantile of interest of the lifetime distribution. One criterion is based on a precision factor for a credibility interval for a distribution quantile and the other is based on the length of the credibility interval. We provide simple closed form expressions for the relationship between the needed number of failures and the precision criteria. Examples are used to illustrate the results.Received: October 2002 / Revised: March 2004     

服务贸易发展的宏观政策战略转变分析

顺应全球产业结构的发展变化趋势,做好中国服务贸易发展的战略准备。作者提出了中国宏观经济发展思路和宏观经济发展政策的八个战略转变建议及具有针对性的有关中国服务贸易发展的五大产业政策转变对策。     

网络环境下的水利信息服务

网络的充分发展,使信息资源出现了许多新的特点,为信息服务提供了一个新的服务环境,水利信息服务必须充分利用网络技术与网络信息资源,开展各种形式的水利信息服务。     

物流企业服务柔性能力研究

分析了我国物流企业现状,研究了服务柔性能力内涵,提出从三个层面研究发展物流企业服务柔性能力。     

农机服务规模经营对粮食生产效率的影响机理研究

依据2009—2019年全国31个省（自治区、直辖市）的省级面板数据,运用随机前沿分析方法和Tobit模型,考量农机服务规模经营对粮食生产效率的影响及其作用机理。结果显示：2009—2019年,中国粮食生产效率总体递增,但区域间发展不平衡;农机服务规模经营通过技术引入效应和劳动力替代效应提高粮食生产效率,其中,技术引入效应的发挥受限于农业研发支出水平及其增速,劳动力替代效应在农业劳动力成本高的区域发挥的影响效用更佳。鉴于此,应加快农业科技创新,发展粮食生产全程机械化服务,完善农机社会化服务体系。     

发展我国私人银行业务的若干思考

私人银行是指以财富管理为核心、面向社会富裕人士提供的一种个性化高端金融服务,其显著特点是根据客户需求提供量身定做的金融服务,并保证私密性.我国财富管理市场潜力巨大、需求极其旺盛,且中资银行在私人银行业务方面拥有比较优势,发展我国私人银行业务的前景广阔.但是,发展我国私人银行业务也面临着诸如服务理念落后、产品狭窄、专业人才匮乏、管理信息系统滞后等诸多制约因素.因此,我国银行业应营造正确的金融服务和金融消费理念,推进业务综合化、拓展金融产品,构建高效的人才机制和信息管理系统,加强与有丰富私人银行经验的外资银行的战略合作,以促进私人银行业务的发展.     

MMS系统的原理结构与应用浅析

多媒体短信息服务(MMS)是目前短信息技术开发最高标准的一种.它最大的特色就是支持多媒体功能.MMS可即时实现终端到终端、终端到互联网或互联网到终端的信息传输,允许传输数据、文本、图像、音频、视频消息.本文对MMS的原理结构作了较为详细的分析,列举了MMS的几个其型应用例子.