一种基于BP神经网络的B2C电子商务顾客满意度评价模型

针对当前电子商务顾客满意度评价方法所存在的不足,提出一种基于BP神经网络的评价模型。首先,建立了B2C模式下电子商务企业顾客满意度评价指标体系,然后根据指标体系,设计了BP神经网络模型,并利用神经网络工具箱对模型进行了实现,通过学习样本的训练,使模型的误差达到预定的范围内．验证结果表明,BP神经网络方法对B2C模式下电子商务企业顾客满意度评价有着良好的效果。     

我国现阶段电子商务B2C类型物流配送模式的经济学分析:以B2C网上书城为例

本文尝试以现阶段制约B2C电子商务发展的约束条件作为假设构造模型理解电子商务企业在此之下的优化选择,并且结合案例进行分析,进而提出相关的政策建议。由于现阶段信用体制的缺失,选择送货上门的配送模式是B2C电子商务网站通过把违约的风险转嫁到自己身上从而赢取消费者信任的产物。然而由此引发的较高的成本问题使得网站不得不通过设立配送费用这种价格歧视方式舍弃利润微薄的部分,在需求最为密集的小范围内进行集中经营,同时引导消费者把多单消费转为单单消费。另外,由配送体制本身的时间问题导致了整个B2C电子商务市场的现状;网上商店和传统商店的比较优势只能体现在价格上。在此基础上对电子商务企业和政府提出相关建议。     

我国中部地区国家级高新技术产业开发区创新绩效评价

对高新技术产业开发区创新绩效进行评价,有助于发现和解决高新区创新体系运行中存在的问题,提高创新体系的运行效率。本文根据高新区的创新过程和特点,选取了高新区创新绩效的评价指标,并运用C2R模型对我国中部地区9个国家级高新区的创新绩效进行了评价。结果发现:部分中部地区国家级高新区的创新投入不足、资源配置效率偏低。为了促进这些高新区的发展,必须加强政策、金融、中介、技术和信息服务体系的建设,形成一个创新的网络体系。     

中国省际隐含碳排放空间与产业转移路径研究

采用省区间细分行业的投入产出和碳排放数据,构建多边贸易视角下的多区域投入产出MRIO模型,分析中国省际隐含碳排放的空间转移和产业转移的规模和路径。结果表明：省际碳排放呈现出中西部欠发达省区向东南部经济发达省区转移的区域空间路径,地理临近效应和产业结构互补效应是转移主因;省际碳转移的产业路径大致沿产业链由欠发达地区上游产业向经济发达地区下游产业转移,电力、热力的生产和供应业等是碳转出的主要产业来源。     

保证金制度下C2C逆向物流平台定价研究

基于双边市场理论,引入保证金制度,建立5种定价模型,为C2C逆向物流平台选择均衡定价决策提供参考。研究发现,双寡头竞争市场中任一平台不会率先收取保证金,保证金的收取有可能使得平台对用户收取的注册费为负,并且5种定价模式中,大部分情况下平台选择对卖家收取保证金、对买家收取注册费时平台获取的利润最大。     

eHealth in Egypt: The demand-side perspective of implementing electronic health records

The present study sheds light on the expected factors that would impact the adoption of the Electronic Health Records (EHR) service in Egypt from the demand-side perspective, i.e. the healthcare consumer's standpoint. This empirical study is motivated by the use of EHR in many countries as a method of promoting healthcare services. Another incentive for the present study is to look at EHR as a top layer in the Next Generation of Information Infrastructure (NII). EHR is considered an efficiency-enhancing and cost-effective technology. Moreover, the issue of developing the healthcare sector in Egypt has the attention of government policymakers, who have a comprehensive healthcare and social insurance law that will be discussed in the Egyptian Parliament, in the near future. The study highlights the socio-technical approach used in analyzing the EHR as an eHealth application in Egypt. The underlying theoretical framework of this study implicates the Unified Theory of Acceptance and Use of Technology in the Consumer Context (UTAUT2) model. It also applies an integrated framework of multifaceted perceptions used to explain the expected adoption or behavior of the Egyptian consumer vis-à-vis EHR. The study relies on primary data collected after surveying 559 respondents. Results reveal that determinants of EHR include demographics such as place and gender, but more importantly constructs such as price value, effort expectancy and facilitating conditions are key factors that play a part in the decision made by the Egyptian consumer to adopt EHR technology. Finally, additional insight and recommendations are offered to the policymakers.     

电力市场中厂网合作的CO2减排调度模式研究

本文通过分析电力市场中独立发电商与电网公司之间的合作激励,提出厂网合作的CO2减排调度模式。基于CO2减排调度规则及独立发电商报价系数对竞价市场的影响,确定了厂网合作方式与约束条件,构建厂网合作模型,求解出最优合作策略,并设计了相应的增量收益分配方案。最后,通过实例检验了所述调度模式的合理性。     

我国货币政策调控房地产价格的效果分析

通过实证分析2000年第一季度到2006年第一季度我国M2（广义货币供应量）和房地产价格的相互关系考察货币政策调控房地产价格的效果。结论是：通过吸纳金融市场过多流动性,中央银行货币政策起到了抑制房地产价格过快上涨的效果。但不能消除房地产过热。防止房地产过热还需综合运用各项政策。     

消癌止痛散对小鼠镇痛作用及对血清β-内啡肽、前列腺素E2水平的影响

目的 探讨消癌止痛散对小鼠的镇痛作用以及对血清β-内啡肽(β-EP)、前列腺素E2(PGE2)水平的影响.方法 选取SPF级的昆明小鼠30只,随机分为空白对照组(面粉)、消癌止痛散(0.4 g/只、0.8 g/只)共3组,每组10只并进行温浴缩尾法镇痛实验;另选取SPF的昆明小鼠24只,随机分为空白对照组(面粉)、模型...     

Interest rate model comparisons for participating products under Solvency II

Under the Solvency II regulatory framework it is essential for life insurers to have an adequate interest rate model. In this paper, we investigate whether the choice of the interest rate model has an impact on the valuation of the best estimate of the liabilities. We use three well-known interest rate models; the CIR++-model, the G2++-model and the Libor Market model. Our numerical results show that for low to medium durations of the liabilities and a relatively low proportion of credit bonds in the asset portfolio, the three interest rate models produce quite similar values for the best estimate liabilities. However, for large durations of the liabilities, or a large bond proportion, or both, the differences can be quite large. There is no easy answer to the question of which model should be used in cases where the choice of interest rate model has a significant impact. Based on the study described in this paper, our advice is to use the G2++-model, which seems to represent an appropriate trade-off between accuracy and complexity.