基于排队论的可修件维修模型

通过运用排队论的理论和方法对可修件的维修排队系统进行分析,建立了维修排队系统模型,为评估系统效能以及调整改进系统提供了理论依据,最后通过实例分析对模型的可行性进行了验证。     

Exploring the acceptance of technology for mobile shopping: an empirical investigation among Smartphone users

In this work, we evaluate the phenomenon of asymmetric perception of some nonverbal stimuli located in an aisle of a virtual store. In a stimulus detection experiment, with a number of potentially confounding variables held under control, it was found that the nonverbal stimuli utilized (belonging to the color, size, and shape families) were perceived more rapidly when placed on shelves on the left rather than on the right of the observer. This response pattern was constant regardless the nature of stimulus and the gender of observer. The experiment also showed the following sequence, in descending order of perception rapidity: color–shape–size. Our results appear consistent with the predictions of the brain laterality theory. Overall, our article provides an initial contribution to extend the results of Rettie and Brewer (Journal of Product and Brand Management 2000; 9, no. 1: 56–70) pioneering work obtained by reference to specific problems of package design to the positioning of items with respect to in-store traffic flow. Limitations and managerial implications of our work are discussed.     

集团理论下产业集聚的低效率与产业演化

基于国内外关于产业集群理论研究获得了长足的发展,与之相关的文献又是非常丰富。运用经济学中的博弈论相关的方法,从集团理论的视角出发,对当下热点话题产业集群的低效率进行详细的分析;并且根据中国2000～2010年高技术产业5个行业的截面数据进行实证分析,检验理论推导的正确性。结果显示,高技术产业的集聚状况确实缺乏效率,并提出相应的对策建议。     

An Assessment of the Psychometric Properties of the Perceived Stress Scale‐10 (PSS10) with Business and Accounting Students

Using a sample of 557 undergraduate business students from three U.S. comprehensive universities, this study examined: (a) the factor structure of the Perceived Stress Scale‐10 (PSS10; Cohen and Williamson, 1988); (b) the invariance of its factor structure; (c) the scale's reliability; and (d) its convergent and divergent validity. Confirmatory factor analyses supported a structure with two primary factors, General Distress and Ability‐to‐Cope, loading on a single second‐order factor, Perceived Stress. Furthermore, this model was confirmed for designated subpopulations including the 264 accounting majors who participated in the study. Notably absent in prior research, this study found two items, numbers 2 and 9, to load significantly on both the General Distress and Ability‐to‐Cope factors with men and the full sample, respectively. Item–total correlations, coefficient alphas, and Spearman‐Brown reliability coefficients supported the reliability of the items loading on the full scale as well as on each of the two primary factors. Combined, these findings provide compelling evidence in support of the PSS10 as a stress assessment measure for business students in general, and accounting students in particular. In fact, given its practical expediency in terms of administration and scoring, the PSS10 appears to be a tool that could be used by university administrators and potentially by human resource personnel at accounting and business organizations to assess student/employee perceived stress levels before the onset of burnout tendencies, thus facilitating more timely and cost‐effective intervention strategies.     

创业管理因素结构及反向题目方法效应研究

本研究分析创业管理量表反向题目对因素模型引入的方法效应,通过在模型中引入方法因子,发展并验证创业管理的一个新的二阶2因素模型。本文通过对中国277家企业的调查数据进行验证性因素分析,讨论不同因素模型的理论基础、复杂程度及可解释性,最后指出结论的理论意涵。     

The Value Relevance of Multiple Occurrences of Nonrecurring Items

Discontinued operations, special items, or extraordinary items typically are nonrecurring items in firms' income statements. As such, prior research has theorized that these items are of minimal relevance to market valuation of the firm, since they are transitory in nature. Moreover, anecdotal evidence in the financial press is supportive of this notion. We examine firms that report either single or multiple occurrences of such items over a rolling six-year period between 1977 and 1996 and find in both cases that such items are value-relevant. When multiple occurrences are not partitioned by type (discontinued operations, special items, or extraordinary items), the more recent such event in the series has a negative effect upon market value of equity, whether it has had a positive or negative effect upon net income.This is consistent with at least two possible explanations, multiple occurrences of such items indicate firms in financial difficulty, or multiple occurrences indicate firms whose managers have engaged in repeated attempts at earnings management, and that the most recent attempt is being devalued by the market. We find patterns of discretionary accruals consistent with managers engaging in upward earnings management prior to multiple write-downs using special items. We also find that firms with multiple write-downs are more likely to go into liquidation or bankruptcy within the next five years. We find that single occurrences also are value-relevant and are positively correlated with market values. Tests on the sample when partitioned by type lead to similar results, though signs of the effects upon net income change in some instances.     

任意均分间隔的预失真结构

基带预失真技术是解决调制器输出信号出现的幅度失真和群时延失真的有效方法。对于全数字高速调制器的升采样、软件无线电和中频数模转换器（DAC）等特点,传统的码元间隔滤波和分数间隔滤波结构难以取得很好的效果。针对这一问题,提出了一种新的任意均分间隔的滤波结构,跳过重采样,直接对升采样后的数据做自适应滤波,可以获得更好的预失真效果。Matlab仿真得到的任意均分间隔滤波结构效果好于码元间隔滤波结构,且实测结果表明该结构可以显著减少高速调制器输出信号的失真。     

灭菌后纸塑小包装物品的应用和管理方法

随着科学的发展,灭菌物品外包装也随之改进,由原来的只用棉布类包装逐步改为一次性无纺布发展到纸塑包装。供应室是提供无菌物品的科室,以往采用双层棉布包装小件器械,用储槽散装纱布、棉球,使用有效期为7～14天,现根据医院感染管理规范规定,无菌储槽中的无菌物品一经打开,有效期不得超过24小时,提倡小包装、单包装。本文就针对灭菌后纸塑小包装物品的应用和管理方法进行了探讨。     

一种新型虚拟任意波形发生器的设计

企业并购会对包括债权人在内的利害关系人的利益发生重大影响。相对于企业股东、职工来说,债权人,特别是无担保债权人利益保护在企业合并中的利益保护机制不畅,所以应要求企业履行通知义务,以防止企业合并中的信息不对称和损害债权人利益的行为。本文从民商法角度讨论该通知义务的履行主体、通知方式和未通知的法律后果等问题。     

"公务员招聘"的层次分析法

本文通过现实社会中公务员的选拔情况,对国家公务员所要求的5方面的考核标准(笔试成 绩、知识面、理解能力、应变能力、表达能力)赋予相应的权重,应用层次分析法比较、分析,从而得出各应聘人 员的多方面能力的高低,选出所要求最优人选数目。然后用整数规划确定各种条件下的分配方案,把优选出 来的人应用到最能发挥它长处的地方。本文中对公务员的各方面能力进行定量化,使人才的录用更加理性 化;针对公务员选举的最优方案所建立的数学模型和运用的方法对进一步改进我国公务员招聘的运行程序 和考核指标具有很强的实用价值和参考意义。