Expected utility without continuity: A comment on Delbaen et al. (2011)

This paper presents preference axiomatizations of expected utility for nonsimple lotteries while avoiding continuity constraints. We use results by Fishburn (1975), Wakker (1993), and Kopylov (2010) to generalize results by Delbaen et al. (2011). We explain the logical relations between these contributions for risk versus uncertainty, and for finite versus countable additivity, indicating what are the most general axiomatizations of expected utility existing today.     

Monotonicity of the (reversed) hazard rate of the (maximum) minimum in bivariate distributions

It is well known that in the case of independent random variables, the (reversed) hazard rate of the (maximum) minimum of two random variables is the sum of the individual (reversed) hazard rates and hence the onotonicity of the (reversed) hazard rate of the marginals is preserved by the monotonicity of the (reversed) hazard rate of the (maximum) minimum. However, for the bivariate distributions this property is not always preserved. In this paper, we study the monotonicity of the (reversed) hazard rate of the (maximum) minimum for two well known families of bivariate distributions viz the Farlie-Gumbel-Morgenstern (FGM) and Sarmanov family. In case of the FGM family, we obtain the (reversed) hazard rate of the (maximum) minimum and provide several examples in some of which the (reversed) hazard rate is monotonic and in others it is non-monotonic. In the case of Sarmanov family the (reversed) hazard rate of the (maximum) minimum may not be expressed in a compact form in general. We consider some examples to illustrate the procedureResearch of the second author is supported by a grant from Natural Sciences and Engineering Research Council and the research of the other two authors is partially supported by a travel grant from the Canadian American Center of the University of Maine     

Axiomatization of weighted (separable) utility

Nontrivial decision problems typically involve a trade-off among multiple attributes of choice options. One simple way of resolving such trade-offs is to aggregate multiple attributes into one real-valued index, known as weighted or separable utility. Applications of weighted utility can be found in choice under risk (expected utility) and uncertainty (subjective expected utility), intertemporal choice (discounted utility) and welfare economics (utilitarian social welfare function). This paper presents an alternative behavioral characterization (preference axiomatization) of weighted utility. It is shown that necessary and sufficient conditions for weighted utility are completeness, continuity, bi-separable transitivity (and transitivity if none of the attributes is null, or inessential).     

聚L-乳酸的合成及其性能研究

以辛酸亚锡为催化剂,丙交酯为单体,开环聚合得到聚L-乳酸(PLLA)。研究了各种因素对PLLA分子量及性能影响,包括单体的纯度、催化剂的浓度、反应温度及时间等。并产物进行了分子量及降解性能测试。结果表明,PLLA材料是热不稳定聚合物,具有良好的降解性和生物相容性。     

Economic Theories of Political (Dis)integration

Abstract.  This paper surveys the recent political economy literature on countries' incentives to form international unions and/or to disintegrate in smaller jurisdictions. The main factors that affect these incentives are (i) economic integration, (ii) the international order, (iii) international spillovers and (iv) the institutional setting. Some implications are drawn for the current debate in Europe on the political effects of economic integration, on the enlargement process and on the distribution of prerogatives between the European Union and national governments.     

含四个未知函数的费马型丢番图函数方程非平凡亚纯解的研究

本文利用亚纯函数值分布论的思想方法,对费马型丢番图函数方程f_1~n(z)+f_2~n(z)+f_3~n(z)+f_4~n(z)=1的非平凡亚纯解的存在状况进行研究,得到如下结果:函数方程f_1~(17)(z)+f_2~(17)(z)+f_3~(17)(z)+f_4~(17)(z)=1不存在级小于1的非常数亚纯函数解。     

职业兴趣探索卡(大学本科版)的编制和应用研究

随着社会的发展、教育的不断深入,大学生入学选专业、毕业求职中,越来越多的注重兴趣爱好,高校在学生的教育管理中融入了更多职业生涯规划的内容,用人单位在选录人员的时候将人职匹配作为一项很重要的指标。那么,对于职业兴趣的测验无疑显得越来越重要。职业兴趣探索卡是进行职业兴趣测评的一个有效工具,它介于正式测评和非正式测评之间,通过一组卡片探索受测者的职业兴趣。本研究通过问卷调查,产生了职业熟悉度最高的200个职业;通过访谈、组织专家讨论等方式确定最终的60个职业;通过个体施测、团体施测、统计分析,最终形成包含3张标示卡、7张说明卡、60张职业卡和5张空白卡的职业兴趣探索卡(大学本科版)。     

(Non-)Existence of Equilibria in Multicommunity Models

This paper reconsiders equilibrium existence in models with migration and voting over local public goods. We show that under some straightforward assumptions on preferences and income distributions, the basic structure of multicommunity models (i.e., perfect mobility, majority rule, single crossing property) implies that no equilibrium with jurisdictions conducting different policies can exist. Stratification equilibria—with sorting of the population according to income classes—are therefore not as natural as is sometimes suggested. Mechanisms that can serve to support stratification (i.e., tight housing markets, returns to scale in the provision of publicly consumed goods) are discussed.     

制造执行管理系统(MES)的应用探析

制造执行系统(MES)是制造生产过程的计算机在线管理系统,是企业资源计划系统和设备控制系统之间的桥梁和纽带,是企业实现全局优化的关键性系统。作者现在主持广西教育厅《制造执行管理系统(MES)应用研究》课题项目,通过对南宁化工股份有限公司MES系统项目(一期工程)的研究,介绍了MES系统的应用研究现状,阐述了MES系统的基本功能架构及软件架构,提出了MES流程工业所需要的关键技术。同时,将先进的生产过程控制技术应用于院校的自动化实训建设,提高教师的技能,更新知识。     

全面剖析经济增加值(EVA)

系统地阐述了经济增加值(EVA)的基本理论,在与传统业绩评价指标进行对比的基础上总结了其优越性;并通过设置奖金银行账户来建立激励薪酬机制,以此来全面地认识和了解经济增加值。     

农药降解的GM（1,1）模型

重点介绍了一种农药降解的ＧＭ（１,１）模型,实你分析表明,ＧＭ（１,１）模型的预测精度高于经典的指数函数模型。     

改进的非等间距GM(1,1)模型的优化

针对传统非等间距GM(1,1)模型的不足,本文分析了传统非等间距GM(1,1)模型的基本原理,分析了传统非等间距GM(1,1)模型与白化方程之间的差异,提出了改进累加序列的方式来优化非等间距GM(1,1)模型,并建立了一种新的累加方式并应用于某大坝沉降。分析了本文中的非等间距GM(1,1)模型与传统非等间距GM(1,1)模型之间的差异。实例表明了改进非等间距GM(1,1)模型精度较高,更适合于工程实例。     

Econom(etr)ics of crime and litigation

Economists approach the behaviour of potential criminals, litigants and law enforcement agencies in terms of rational choice: the actors choose the best alternatives in terms of costs and benefits within the choices open to them. The prime focus of economists is on the general factors in society affecting the crime and litigation level and on the interaction between the crime and litigation level and the legal system. In doing so they have to study the interaction between the micro level of individual decision making and the macro level of the law enforcement system reacting on these decisions. Data are often only available at aggregate (macro) level. Econometric studies at the macro level, especially time series, have the problem that many effects have to be estimated from a limited number of data. Various types of studies and some empirical results regarding crime, litigation and the workload of judicial services are discussed.     

正交实验设计方法在B to B电子商务体系质量改进中的应用

电子商务在全球快速地发展，中国企业面临着由B to C方式向B to B方式的转变，本文采用正交实验设计的方法来解决已建成电子商务体系的质量，以满足新的需求。     

1-(4-硝基苯基)-3-(4-硝基-噻唑)-三氮烯的合成及其与铜的显色反应

报道了本文报道了1-(4-硝基苯基)-3-(4-硝基-噻唑)-三氮烯(NPNTT)的合成及其与铜的显色反应。在TritonX-100存在下,pH11.0的Na2B4O7-NaOH缓冲溶液中,该试剂能与铜发生显色反应,铜与NPNTT形成摩尔比为1:2型的配合物,在460nm处有一最大正吸收,在540nm处有一最大负吸收。以460nm为参比波长,540nm为测量波长进行双波长测定,表观摩尔吸光系数为2.68×105L·mol-1·cm-1,铜的浓度在0～480μg/L范围内符合比尔定律。用拟定方法测定人发中的微量铜,结果满意。     

基于价值链(VC)发展的制造企业业务流程再造(BPR)实证研究

以价值链工程发展为基础,从深度和广度两个层面对业务流程再造进行剖析;指出BPR随着价值链的发展经历了四个阶段:企业局部流程再造,企业整体流程再造,多个企业间流程再造(虚拟企业)和循环经济模式下流程再造(绿色价值链);并分析了每个阶段BPR的特点。再以制造企业为例,引用相应的案例进行实证分析,从而指出企业获得核心竞争力的途径之一就是不断进行价值链的重组;实际上,也就是根据企业自身发展,以价值链为核心,对业务流程进行再造。     

交通政策与土地利用脱节的案例--析美国亚特兰大的MARTA公交系统

作为全美第九大公交系统,投资庞大的亚特兰大捷运(MARTA)并没有对亚特兰大交通运输发挥其应有的作用以帮助解决亚特兰大日趋严重的交通堵塞和环境污染问题.亚特兰大捷运的失败是多方面的,但最重要的原因是城市空间形式与大众交通系统的关系决定了亚特兰大发展公共交通系统的先天不足.亚特兰大低密度,分散扩张的多中心城市形态,一个以私人汽车占主导地位的交通网络系统使城市对亚特兰大捷运的依赖程度降至最低.亚特兰大城市面临的严重问题和亚特兰大捷运的现状清楚地剖析了城市空间结构与城市交通模式选择密不可分的紧密关系,其中的经验和教训对城市发展政策,规划理念及城市交通系统的发展有十分重要的借鉴意义.     

大粒径沥青混凝土路用性能研究

通过三轴试验对大粒径沥青混合料的强度构成参数,即粘聚力c和内摩阻角准进行了试验研究,研究了大粒径沥青混合料得高温稳定性、水稳定性及力学性能。研究表明,大粒径沥青混合料具有很好的高温稳定性和抵抗反射裂缝的性能,具有良好得使用效果,可延长路用使用寿命,因而具有较好得经济和社会效益。     

语境与二语习得的关联性

从国内外语言学界对二语习得研究方向来看,它经历了从"第二语言教学"到"第二语言学习"的转变。就其目前研究重点来看,二语习得研究中多集中在习得者个体与二语习得关系上,而忽视了二语习得过程中其它一些与二语习得的关联极大的语境因素。文章首先对语境理论研究进行了概述,而后阐述了影响二语习得的语境因素及其与二语习得之间的关联性。