基于DEA理论的地区旅游业效率评价

运用数据包络分析(Data Envelopment Analysis DEA)理论对中国各地区的旅游业进行效率与规模收益分析,研究表明:地区间的效率差距明显、各地旅游业的规模效益是递增的、旅游业的管理与技术水平落后、资源配置在旅游业的发展中起重要作用等。研究结果可以为地区旅游政策、旅游战略决策的制定提供参考。     

超市供应商通道费驱动因素研究——基于上市超市面板数据的分析

本文综合通道费的效率理论和市场势力理论,总结出超市向供应商收取通道费的几个主要驱动因素,并分析其经济原理。在此基础上,选取检验不同驱动因素的指标,采用面板数据的个体固定效应模型对中国上市超市数据进行了实证分析。研究表明:超市的总资产和经营成本对超市的通道费有显著影响,超市向供应商收取通道费的主要驱动因素是其市场势力和转移经营成本的动机。最后,实证研究的结果对通道费的效率理论和市场势力理论都给予了支持,表明这两种理论是不矛盾的。     

面向AFH客户分类主题的数据仓库的构建

近年来,随着客户关系管理（CRM）在商业运作中的巨大成功,其管理理念及价值被越来越多的企业所重视。在电子商务环境下,一对一营销正在受到企业的青睐。以客户为中心的思想,要求企业要能够有效地获取客户的各种信息,识别客户与企业之间的关系。文章在分析数据仓库特点的基础上,以客户平均购买额（A）、购买频率（F）和客户保持时间（H）作为客户价值细分变量,实例化构建了某食品连锁销售企业面向AFH客户分类主题的数据仓库。应用结果表明,新的AFH客户分类模型具有很强的表征性,能充分反映客户的当前价值（贡献度）和增值潜力（忠诚度）,能为企业提供有效的决策支持信息。     

决策支持系统在企业中的初期实践——数据集中分析系统的应用及思考

数据集中分析系统是一个贵阳供电局各生产、营销等各类业务数据的综合展示平台,系统建设初期主要实现了MIS、电能量、用电营销和9559g等系统的数据抽取及分析工作。通过数据集中分析系统的数据平台可以达到消除“电力信息孤岛”,整合已有信息资源,实现了结构化的简单决策支持,为更深入的决策分析和数据挖掘奠定了技术和数据基础,是决策支持系统在电力企业的早期实施案例之一。     

探索性数据分析在我国人均可支配收入研究中的应用

人均可支配收入这个指标,经常被用来考察区域经济发展中居民生活水平状况,并从居民生活水平来考察经济发展水平。由于区域性经济发展水平的差异性和不平衡性,人均可支配收入在数值分析中易受到离群值和异常值的影响,采用传统证实性分析的数据处理方法往往难以将各地的数据特征有效分离。为减少异常值的影响得到较为满意的数据处理结果,可以采用探索性数据分析法(EDA)对各区域的人均可支配收入数据进行处理,其优点是重视数据的总体特征对数据的局部不良行为不敏感,可以更清楚的认识到各地区经济发展的差异,从而实现更好的了解和把握国家或地区的宏观经济运行状况这一目的,从而为政策的制定提供一定的参考依据。     

Are existing soils data meeting the needs of stakeholders in Europe? An analysis of practical use from policy to field

Soils form a major component of the natural system and their functions underpin many key ecosystem goods and services. The fundamental importance of soils in the environment means that many different organisations and stakeholders make extensive use of soils data and information in their everyday working practices. For many reasons, stakeholders are not always aware that they are reliant upon soil data and information to support their activities. Various reviews of stakeholder needs and how soil information could be improved have been carried out in recent years. However, to date, there has been little consideration of user needs from a non-expert perspective. The aim of this study was to explore the use of explicit and hidden soil information in different organisations across Europe and gain a better understanding of improvements needed in soil data and information to assist in practical use by non-expert stakeholders. An on-line questionnaire was used to investigate different uses of soils data and information with 310 responses obtained from 77 organisations across Europe. Results illustrate the widespread use of soil data and information across diverse organisations within Europe, particularly spatial products and soil functional assessments and tools. A wide range of improvements were expressed with a prevalence for finer scale resolution, trends over time, future scenarios, improved accuracy, non-technical supporting information and better capacity to use GIS. An underlying message is that existing legacy soils data need to be supplemented by new up-to-date data to meet stakeholder needs and information gaps.     

基于电子信用卡网上支付的安全电子交易（SET）协议的研究

安全电子交易协议是电子商务中基于信用卡支付系统最典型、最常用的国际标准,该协议定义了客户、商家、支付网关及金融机构之间数据的流通过程,并对这些信息流都采取了数字加密及数据认证技术,以此确保网上交易的安全。但它过于繁杂的程序使得系蔓号承粤过重的负载,这个问题如今越来越引起了专家们的关注,并成为未来研究改进的重点。     

一种高速移动衰落信道的特性与分析

高速移动信道不同于一般的移动信道，其速度影响亦不可忽视，本文分析了高速移动信道的特性，提出了信道模型，并进行了性能分析。     

A nonparametric analysis of the determinants of family farm efficiency dynamics in Lithuania

This article presents insights into the efficiency of Lithuanian family farms. The research covers the years 2004–2009 and is based on farm‐level Farm Accountancy Data Network data. Bootstrapped data envelopment analysis was employed to obtain efficiency scores, whereas stochastic kernels and multivariate methods, viz. fuzzy clustering and nonparametric regression, were utilized to assess the impact of selected determinants on efficiency. Clustering analysis indicated that the efficiency change paths specific for the analyzed sample differed in both their average levels and ranges. Furthermore, it was concluded that Lithuanian agricultural policy should focus on increasing the efficiency of crop farms. Cluster analysis suggested that production subsidies might be having a negative effect on efficiency.