我国应急信息系统及其管理架构

当前,突发事件应对已成为各级政府无法回避的重大课题。作为应急管理的稳压器、协调器和控制器,应急信息的有效传播和应用对突发事件的科学应对至关重要,而对我国应急信息系统及其管理架构尤其值得深入研究。     

The Relative Importance of Impulse Buying in Asia Pacific Countries:

In this study, buyers were classified into three categories, namely planners, partial planners and impulse buyers, based on the consumer's product category buying intention and specific brand buying intention prior to entering stores. Five hundred and sixty eight and one hundred on-street interviews were conducted in New Zealand and Hong Kong, respectively. The results indicated that the proportion of impulse buyers in New Zealand was rather small (27%) when compared with that of planners and partial planners (50% and 23%, respectively). In contrast, the Hong Kong study found that the incidence of impulse buying behaviour (45%) was more common that the other two types of behaviours. However, despite the difference in the level of impulse buying behaviour between the two coutries, all the types of buyers in both countries agreed that low price was the primary stimulus that induced impulse buying.     

MEMS固体化学微推进阵列的微冲量测试技术

为了评价MEMS(Micro Electro Mechanical Systems)固体化学微推进阵列的推进性能,对其单元微冲量的精确测试显得尤为重要。在传统冲击摆的基础上,考虑微推进器推力和燃气射流冲击力之间的比例关系,设计了一套适用于MEMS固体化学微推进阵列单元微冲量的间接测试装置,并成功用于6×6规格(单元集成度为36个/cm²)微推进阵列的实际测试中。结果表明:典型实验数据下的待测微冲量为2.5442×10-4Ns,相对误差小于5%；实测8个单元的微冲量平均值为2.5574×10-4 N·s,相对偏差较小,具有很好的重复性。      

The Emergence of Second‐Tier Auditors in the US: Evidence from Investor Perceptions of Financial Reporting Credibility

We examine changes in the association between auditor type (Big 4, Second‐Tier, and Other non‐Big 4) and perceived financial reporting credibility in the wake of events (e.g., Andersen's failure, the implementation of SOX, creation of the PCAOB, etc.) which led to significant growth in Second‐Tier client portfolios and increased scrutiny of Second‐Tier audit practices. Our results reveal that financial reporting credibility of Second‐Tier clients was lower than that of Big 4 clients and was indistinguishable from that of Other non‐Big 4 clients pre‐Andersen. However, post‐Andersen, we find that financial reporting credibility of Second‐Tier clients is higher than that of Other non‐Big 4 clients and is indistinguishable from that of Big 4 clients. We expect that our results will be of interest to regulators, both in the United States and in the European Union, who have expressed concerns about the current state of competition in the audit market, management and boards of directors that are contemplating switching to a Second‐Tier audit firm, and academics investigating quality differences among audit firm types.     

基于时频分析的裂纹转子碰摩故障特征研究

为研究转子系统耦合故障特性,采用有限元方法建立了含有横向裂纹、转静碰摩的非线性转子动力学模型。首先研究了不同转速下裂纹、碰摩单一故障下转子系统的振动响应,其次研究了两种故障耦合情况下系统的振动响应特征。采用波形图、FFT谱图、瞬时频率和Hilbert-Huang时频谱(HHS)相结合的方法对故障转子振动信号进行了分析。分析结果表明:运用多种时频分析相结合的方法可以较为全面地了解转子的故障特征,裂纹转子在1/5、1/3临界转速时会发生较为明显的5X、3X谐波,且裂纹的产生会导致响应幅值增大,从而引起更为严重的碰摩。      

Using Electronic Response Systems in Economics Classes

College instructors and students participated in a pilot project at the University of Akron to enhance student learning through the use of a common teaching pedagogy, peer instruction. The teaching pedagogy was supported by the use of technology, an electronic personal response system, which recorded student responses. The authors report their experiences in using this technology-enhanced teaching pedagogy and provide another example of an active and collaborative learning tool that instructors can use to move beyond “chalk and talk.” Preliminary survey results from students participating in this pilot project are also reported.     

快速反应:际华3542品牌竞争力的来源

近5年间,我国纺织服装业经历了全球纺织品配额取消、欧美各国对中国纺织品特保设限、中国与欧美达成纺织品协议等一系列重大外部环境变化。竞争使得产品生产的批量越来越小,过去适宜大批量生产的刚性生产线,越来越不适应新的形势。际华3542纺织企业以其灵活的经营机制,使企业快速、准确的响应市场中变化万千的客户需求,获得了广阔的发展空间。     

Videotex for news and business data: Comparison of user response to two information retrieval applications

An empirical comparison of user response to two information services offered by a prototype videotex system indicated that the business (ie farm market data) service was rated as more efficient and that users browsed more in that service than in the consumer (ie news) service. Further, both efficiency ratings and amount of browsing were more strongly correlated with amount of service use, ratings of service value and ratings of dependence upon the service for the business service than for the consumer service. Browsing thus seems to be a utitarian surveillance behaviour rather than a communication play behaviour in this setting.     

Statistical Analysis of Choice Experiments and Surveys

Measures of households' past behavior, their expectations with respect to future events and contingencies, and their intentions with respect to future behavior are frequently collected using household surveys. These questions are conceptually difficult. Answering them requires elaborate cognitive and social processes, and often respondents report only their “best” guesses and/or estimates, using more or less sophisticated heuristics. A large body of literature in psychology and survey research shows that as a result, responses to such questions may be severely biased. In this paper, (1) we describe some of the problems that are typically encountered, (2) provide some empirical illustrations of these biases, and (3) develop a framework for conceptualizing survey response behavior and for integrating structural models of response behavior into the statistical analysis of the underlying economic behavior.