城市干道交通拥堵识别技术研究

为快速有效地进行城市干道的交通拥堵识别,文中提出一种基于朴素贝叶斯的城市干道交通拥堵识别算法。最后,基于南京市主干道的交通调查数据,对朴素贝叶斯算法以及基于径向基函数神经网络的城市干道交通拥堵识别算法进行对比。结果表明,朴素贝叶斯算法在对城市干道交通状态的识别上比基于径向基函数神经网络算法具有更好的准确性、优越性以及更低的误判率。     

构建企业计算机网络安全防御体系

本文通过分析企业计算机网络系统中存在的不安全因素,介绍了构成企业计算机网络安全防御体系的各个组成部分,最后对构建计算机网络防御体系提出了相应策略。     

RFID在库存管理中应用的研究综述

从运作业务、基础服务、管理决策三个方面详细综述了目前RFID在库存管理中应用的进展,并且对RFID在实施中存在的问题和未来的发展趋势进行了总结和展望。     

浅议绿色物流中运输绿色化

当前,物流业在极大的促进了经济发展的同时,也给社会环境带来了严重的负面效应,因此绿色物流的呼声越来越高。绿色物流包括运输、仓储、装卸、包装等诸多环节,各个环节都直接影响到整个绿色物流的效果,但其中运输是整个绿色物流各环节中占用时间最长成本最大的环节。因此,首先分析物流中传统运输的种种弊端,然后针对这些问题,从政府层面、企业层面、公众层面给出了一些开展物流运输绿色化的可行性建议。     

股票市场、融资模式与产业结构升级——基于中国A股市场的经验证据

本文采用面板数据这一分析工具从区域的层面研究了我国股市融资模式对产业结构升级的影响。在考虑了异质性偏误、遗漏变量和省际特性之后,本文的实证结果发现股票市场融资与我国产业结构升级之间存在正向相关,这种相关性在不同的股市融资模式下又不同:在审批制模式下相关而不显著,而在核准制下通过了1%的显著性检验。这说明我国股市融资模式由审批制向核准制的市场化演进起到了推进产业结构升级的作用;另外,本文的研究还发现,我国股市融资率越高的地区,产业升级的效应越是明显。     

Prudent expectations equilibrium in economies with uncertain delivery

In an economy with private information, we introduce the notion of objects of choice as lists of bundles out of which the market selects one for delivery. This leads to an extension of the model of Arrow–Debreu that is used to study trade ex ante with private state verification. Under the assumption that agents are prudent, equilibrium is characterized by the fact that agents consume bundles with the same utility in states that they do not distinguish. This is a weaker condition than the restriction of equal consumption imposed by Radner (Econometrica 36(1), 31–58, 1968), therefore, some no trade situations are avoided and the efficiency of trade increases.     

构建餐饮业食品安全监管体系的研究

我国餐饮业快速发展的同时食品安全问题并没有得到有效的解决。本文在分析我国餐饮业食品安全存在的主要问题的基础上,就如何建立和完善餐饮业食品安全监管体系,着重从6个方面进行了研究。并对我国餐饮业食品安全监管工作进行了展望。     

地方高校研究生导师管理机制探索与实践

硕士生导师作为硕士生培养的主要实践者,其能力和水平直接关系到教育质量的好坏,如何优化和提升这一群体的整体素质一直备受关注。本文以西华大学硕士生导师队伍管理体制为研究对象,通过研究导师队伍现状,管理机制及制度,对硕士生导师队伍管理体制进行深化研究,从而提出创新硕士生导师队伍管理体制的措施和对策。     

Distinctive Features of Environmental Innovators: An Econometric Analysis

This paper analyzes the main determinants influencing environmental innovators (i.e. firms developing or adopting environmental innovations) in Spain with respect to non‐environmental innovators. Similarly to other contributions in the literature, our results show that Spanish environmental innovators respond to regulatory stimulus in the form of demand‐pull and technology‐push instruments. They have a high internal technological capability and combine internal and external information sources, mostly in cooperation with knowledge institutions. Environmental innovators are more concentrated in mature, traditionally highly polluting sectors, but new firms are not more environmentally innovative than incumbents. Most importantly, in contrast to other environmental innovation studies, mostly carried out in a German context, we have not found evidence of a market pull from either the domestic or international markets. Furthermore, cost savings are not found to be a distinctive driver for environmental innovators. These differential results are possibly related to the special features of Spain regarding its national innovation system and the degree of stringency of environmental regulation and environmental consciousness of its consumers. Copyright © 2013 John Wiley & Sons, Ltd and ERP Environment.     

What makes you click?—Mate preferences in online dating

We estimate mate preferences using a novel data set from an online dating service. The data set contains detailed information on user attributes and the decision to contact a potential mate after viewing his or her profile. This decision provides the basis for our preference estimation approach. A potential problem arises if the site users strategically shade their true preferences. We provide a simple test and a bias correction method for strategic behavior. The main findings are (i) There is no evidence for strategic behavior. (ii) Men and women have a strong preference for similarity along many (but not all) attributes. (iii) In particular, the site users display strong same-race preferences. Race preferences do not differ across users with different age, income, or education levels in the case of women, and differ only slightly in the case of men. For men, but not for women, the revealed same-race preferences correspond to the same-race preference stated in the users’ profile. (iv) There are gender differences in mate preferences; in particular, women have a stronger preference than men for income over physical attributes.