Public Attitudes Toward Nanotechnology

Data from 3909 respondents to an Internet survey questionnaire provide the first insights into public perceptions of nanotechnology. Quantitative analysis of statistics about agreement and disagreement with two statements, one positive and the other negative, reveals high levels of enthusiasm for the potential benefits of nanotechnology and little concern about possible dangers. The respondents mentally connect nanotechnology with the space program, nuclear power, and cloning research, but rate it more favorably. In contrast, they do not associate nanotechnology with pseudoscience, despite its imaginative exploitation by science fiction writers. Qualitative analysis of written comments from 598 respondents indicates that many ideas about the value of nanotechnology have entered popular culture, and it provides material for an additional 108 questionnaire items that can be used in future surveys on the topic. The findings of this exploratory study can serve as benchmarks against which to compare results of future research on the evolving status of nanotechnology in society.     

美容院顾客满意度影响因素的实证分析

本文通过对国内外美容行业现状的分析,以长沙市美容院顾客满意度的问卷调查结果为依据,利用统计研究的方法进行分析,得出了几个影响顾客满意度的关键因素,指出美容院行业在产品和销售服务等方面存在多种管理经营缺陷。     

物业管理招标中的层次关联比选

应用层次分析法确定影响物业管理投标书总体方案的各因素间权重 ,根据灰色关联理论建立了对投标书进行总体综合评价并排序优选的数学模型 ,给出了计算实例 .     

Polynomial time approximation schemes for dense instances of minimum constraint satisfaction

It is known that large fragments of the class of dense Minimum Constraint Satisfaction (MIN‐CSP) problems do not have polynomial time approximation schemes (PTASs) contrary to their Maximum Constraint Satisfaction analogs. In this paper we prove, somewhat surprisingly, that the minimum satisfaction of dense instances of kSAT ‐formulas, and linear equations mod 2, Ek‐LIN2, do have PTASs for any k. The MIN‐Ek‐LIN2 problems are equivalent to the k‐ary versions of the Nearest Codeword problem, the problem which is known to be exceedingly hard to approximate on general instances. The method of solution of the above problems depends on the development of a new density sampling technique for k‐uniform hypergraphs which could be of independent interest. © 2003 Wiley Periodicals, Inc. Random Struct. Alg., 23: 73–91, 2003     

夏普里值在顾客满意度测评中的应用研究

利用夏普里值来识别导致顾客不满意的质量属性.因为夏普里值差异很小的质量属性具有高度的相关性,所以可以把具有相同或者类似的夏普里值的质量属性划分为同类属性,从而能够识别导致顾客不满意的质量属性.算例进一步验证该方法的可行性和正确性.     

产品消费情绪与购后行为关系的实证研究

消费情绪对购后行为有重要的作用,在产品消费中,以往研究主要针对产品属性和商店环境引发的消费情绪与满意的关系,本文作者在文献回顾的基础上,对由广告、消费促进和公共关系等其他营销者可控因素引发的消费情绪与购后行为的关系进行了定量研究,结果表明:由这些因素引发的消费情绪对满意有直接影响,并通过满意间接影响重购意向;对口传行为既有直接影响,也有间接影响,作者最后提出了本研究对管理实践的启示,研究的局限之处及未来的研究方向.     

Condorcet Winners for Public Goods

In this work, we consider a public facility allocation problem decided through a voting process under the majority rule. A location of the public facility is a majority rule winner if there is no other location in the network where more than half of the voters would have been closer to than the majority rule winner. We develop fast algorithms for interesting cases with nice combinatorial structures. We show that the computing problem and the decision problem in the general case, where the number of public facilities is more than one and is considered part of the input size, are all NP-hard. Finally, we discuss majority rule decision making for related models.     

Optimization of maintenance policy under warranty length‐based demand with consideration of both manufacturer and buyer satisfaction

This study proposes a model to optimize postsale services consisting of four factors: (a) the basic warranty length, (b) the extended warranty length, (c) the preventive maintenance level, and (d) the preventive maintenance interval. Furthermore, consumer demand for the product and extended warranty are considered as functions of the length of the basic warranty and extended warranty periods, respectively. Because buyer dissatisfaction with a product can lead to the loss of potential buyers and the switch of current customers to the competitors, both manufacturer and buyer satisfaction are considered in the model. Three comparative studies are done for showing the effectiveness of the model. The first one compares the results of simultaneous optimization from the two perspectives of manufacture and customer with the single‐objective optimization results from each of the mentioned viewpoints. The second comparison studies the provision of extended warranty contract in the proposed model, and the third comparison investigates the effect of preventive maintenance actions on the results of the model.     

网络舆情的研究与发展—以涉警网络舆情为例

网络舆情传播速度快、波及范围广,同时具有很强的突发性、不确定性、难以控制等特点,对相关部门进行涉警网络舆情干预和引导带来巨大挑战。目前有关网络舆情引导、管控机制、应对策略研究等成果丰富、但是对网络舆情危机的演变和干预多停留在定性分析之上、定量分析研究相对欠缺。现有网络舆情研究多针对舆情发展某一阶段进行研究,未结合网络舆情发展的多阶段属性展开全生命周期研究,为数不多的网络舆情多阶段干预决策机制研究也比较粗略,缺乏一套科学、规范的干预决策机制作为支撑。因此,结合网络舆情的多阶段属性、应用定量分析方法,是未来网络舆情干预决策机制研究的方向之一。本文通过对网络舆情发展过程的描述,给出一定量的状态表述和行动刻画,构建一个分类多阶段决策模型框架。     

可再生能源系统的不确定性优化模型及求解

结合新提出的满意度方法和混合整数规划方法,给出了多态不确定性环境下可再生能源规划模型.该模型综合描述了多地区、多时期、多品种、多部门之间的可再生能源管理系统的复杂性、系统性、动态性和不确定性.最后的实例求解结果说明该模型能很好地反映能源安全性、系统可靠性与系统成本之间的关系,并能给出不同系统违反水平下的能源配置方式及增容计划,为决策者提供决策参考.