检索结果-南通市图书馆

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于凸情形下在线设备更新问题的竞争分析

系统工程理论与实践 2009年第11期29卷 145-151页

作者：辛春林陈剑刘天亮北京化工大学经济管理学院北京100029 清华大学经济管理学院北京100084

市场以在线的方式给出新设备,决策者必须决定是否更新现有的设备,并确定何时更新?即在已知现在和过去的设备信息和订单信息而对未来信息一无所知情况下,决策如何更新设备完成陆续达到的订单需求.优化目标是使设备更新投资成本与设备运... 详细信息

市场以在线的方式给出新设备,决策者必须决定是否更新现有的设备,并确定何时更新?即在已知现在和过去的设备信息和订单信息而对未来信息一无所知情况下,决策如何更新设备完成陆续达到的订单需求.优化目标是使设备更新投资成本与设备运行成本总和最小.首先讨论了离线设备更新问题,给出了两种算法并分析了算法复杂度.其后,讨论了凸情形下在线设备更新问题,给出了临界值策略,得出了竞争比为6,证明该策略要优于原有的策略.

关键词：在线问题设备更新竞争分析竞争比

Satisfaction Evaluation of Jingdong Mall Based on Opinion Mining

在线全文

学校读者我要写书评

暂无评论

Satisfaction Evaluation of Jingdong Mall Based on Opinion Mi...

Realizing profits immediately:disposition effect of open-end fund investors in China

第十一届全国经济管理院校工业技术学研究会

作者： Xiaoying WANG 1,Jianhua XIAO 2 1 school of economics and management,Wuyi University,Jiangmen,529020,China 2 school of economics and management,Wuyi University,Jiangmen,529020,China

because online shopping is virtual,consumers has some concerns on the risk of online *** product reviews have a significant reference value for potential consumers to purchase goods and select enterprise as consumers’ shopping experience and use experience illustration,meanwhile as an important word of mouth way to the product reliability and business reputation,it can reduce the shopping risk of *** on the fact,the paper use the text mining approach to extract attribute and analyze emotional tendencies for product reviews of chinese,then establish satisfaction evaluation system of Jingdong Mall,and finally use fuzzy comprehensive evaluation method to calculate the consumer Jingdong Mall satisfaction degree,it is advantageous to improve the operational deficiencies and it provides an important reference to the implementation of online marketing strategies.

关键词： OpinionMining EmotionalTendencyAlalysis Satisf action Degree Fuzzy Comprehensive Evaluation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Southeast University(English Edition) 2008年第S1期24卷 180-186页

作者： Li Yajing1 Zhu Hongquan2 Luan Mingjing2(1 school of economics and management, University of Electronic Science and Technology of China,Chengdu 610054, China)(2 school of economics and management, Southwest Jiaotong University, Chengdu 610031, China)

This paper explores the disposition effect, the tendency of investors to hold losing investments too long and sell winning investments too soon, by analyzing a unique data set that consists of the buying and selling positions of open-end fund investors in China. Results show that investors' buying and selling behaviors are significantly affected by fund performance. The reasons that lie behind such results are mainly related to the non-persistence of fund performance. When fund performance is non-persistent, investors are not clear about the future returns on funds. So, investors, especially individual investors, would have to realize the profits on hand immediately. Meanwhile, fund investors are highly sensitive to fund age and loading fees, but not sensitive to management fees charged by funds when they buy or sell fund shares.

关键词： investors open-end fund disposition effect fund shares

工程项目财务风险分析方法及在大型水电站项目中的应用研究

在线全文

学校读者我要写书评

暂无评论

水力发电学报 2004年第5期23卷 10-14页

作者：王振强钟登华天津理工大学经济与管理学院天津300191 天津大学建工学院天津300072

随着国家水利水电项目融资渠道的多样化 ,以及大型水电项目投资巨大和建设周期长等特点 ,使项目的投资带有不确定性 ,同时电量、电价以及运营成本的不确定性 ,这些将对项目未来的财务可行性产生巨大影响 ,在财务评价中进行财务风险分析... 详细信息

随着国家水利水电项目融资渠道的多样化 ,以及大型水电项目投资巨大和建设周期长等特点 ,使项目的投资带有不确定性 ,同时电量、电价以及运营成本的不确定性 ,这些将对项目未来的财务可行性产生巨大影响 ,在财务评价中进行财务风险分析就显得非常重要。本文提出了基于概率论与模拟技术相结合的工程项目财务风险分析方法。研究了大型水电项目财务评价中风险变量之间的相互影响关系 ,运用模拟技术 ,提出了将项目投资风险与财务风险结合的风险分析方法 ,为快速地进行项目科学决策提供可靠依据。

关键词：水利水电工程风险分析模拟技术财务风险

在线全文

学校读者我要写书评

暂无评论

虚拟企业中核心能力的定性与定量识别

系统工程理论与实践 2002年第5期22卷 48-54页

作者：冯蔚东陈剑清华大学经济管理学院北京100084 清华大学现代管理研究中心北就100084

首先对企业核心能力的概念进行了辨析和界定 ,给出了一个识别核心能力的定性框架 .进一步地 ,根据虚拟企业组建过程的需要 ,提出了一个基于模糊聚类的伙伴企业核心能力的定量识别方法 .最后 ,给出了一个简化的仿真算例。

关键词：虚拟企业核心能力定性定量识别

在线全文

学校读者我要写书评

暂无评论

Procurement Performance Evaluation Index System For Telecom Operators

工程和商业管理国际学术会议

作者： Zhang Xinrui 1 Tao Xiaobo 2 1. school of economics and management North China University of Technology China 100144 2. school of economics and management North China University of Technology China 100144

Based on elaboration likelihood model, this study extends the existing research by investigating how different levels of relatedness of feeling-based ad claims influence degrees of attitude persistence. Results revealed significant main effects of cue relatedness on attitude persistence regardless of the involvement levels. However, the degrees of attitude persistence reduced greater under low rather than high-involvement conditions. This study also found that ad claims, which are verbal-based peripheral cues, influenced attitude persistence differently from those non-verbal cues. These findings have both theoretical and managerial implications.

关键词： cue relatedness involvement attitude persistence

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Procurement Performance Evaluation Index System For Telecom ...

Prediction on Cold Chain Logistics Demand of Urban Residents in Jiangsu Province during the Twelfth Five-Year Plan Period——Based on Estimates of GM(1,1) Model

第三届教学管理与课程建设学术会议

作者： Yijun Huang 1 , Xiayun Gu 2 1 school of economics and management ,Beijing University of Posts and Telecommunications,Beijing, China 2 school of economics and management ,Beijing University of Posts and Telecommunications,Beijing, China

Telecom operators have entered the era of meager profit because the telecom industry is increasingly competitive, and they must find ways to reduce their operating costs to maintain the competitive advantage. This paper collects common indicators of corporate procurement performance through the domestic and foreign literature;It filters out the key indicators which reflect the procurement performance of telecom operators. We provide a procurement performance evaluation index system of telecom operators by using balanced score card which concludes four dimensions-finance, customer, internal operations, and learning and growth. This dissertation applies Analytic Hierarchy Process to quantitatively calculate the weight of index for each hierarchy. Furthermore, it uses fuzzy mathematics method in empirical analysis.

关键词： telecom operators procurement performance Balanced Scorecard fuzzy mathematics

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Asian Agricultural Research 2011年第11期3卷 38-40,45页

作者： ZHENG Yan-min1,ZHANG Yan-cai2,XU Hong-feng2 1.school of economics and management,Nanjing University of Science & Technology,Nanjing 210094,China 2.school of economics and management,Huaiyin Normal University,Huaian 223001,China

This paper takes the total yield of products that need refrigerated transport as the impact factors of transport aggregate of cold chain logistics,such as meat,aquatic products,quick-frozen noodle,fruits,vegetables,dairy,and *** selecting the consumption data of urban residents on transported products via cold chain in Jiangsu Province from 2005 to 2000 as sample,this paper establishes grey prediction model GM(1,1) of cold chain logistics demand and uses DPS7.05 software for test,to predict the cold chain logistics demand of urban residents in Jiangsu Province during the Twelfth Five-Year Plan *** results show that in the period 2010-2015,the cold chain logistics demand of urban residents in Jiangsu Province is 1 151.589 1,1 185.136 6,1 219.661 3,1 255.191 8,1 291.757 3,1 329.388 1 t respectively;in the period 2005-2010,the cold chain logistics demand of urban residents in Jiangsu Province increases at annual growth rate of 3.9%;in the period 2011-2015,the growth rate declines to some extent,increasing slowly at rate of 2.9%.

关键词： Cold chain logistics demand The Twelfth Five-Year

An Approximate Optimal Relationship in the Sampling Plan with Inspection Errors

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2001年第1期13卷 38-43页

作者： YANG Ji ping 1, QIU Wan hua 1, Martin NEWBY 2 1.school of economics & management, Beijing University of Aeronautics and Astronautics, Beijing 100083, China 2.Department of Actuarial Science and Statistics, City University, London, EC1V 0HB, UK school of economics & management Beijing University of Aeronautics and Astronautics Beijing 100083 China Department of Actuarial Science and Statistics City University London EC1V 0HB UK

：The paper presents and proves an approximate optimal relationship between sample size n andacceptance number c in the sampling plans under imperfect inspection which minimize the Bayesian risk. Theconclusion general... 详细信息

关键词： sampling inspection sampling plan imperfect inspection