一类振动函数广义积分的收敛性

将有关振动函数的广义积分的结论加以推广，并给出其收敛性的判别方法。     

Rough sets bankruptcy prediction models versus auditor signalling rates

Both international and US auditing standards require auditors to evaluate the risk of bankruptcy when planning an audit and to modify their audit report if the bankruptcy risk remains high at the conclusion of the audit. Bankruptcy prediction is a problematic issue for auditors as the development of a cause–effect relationship between attributes that may cause or be related to bankruptcy and the actual occurrence of bankruptcy is difficult. Recent research indicates that auditors only signal bankruptcy in about 50% of the cases where companies subsequently declare bankruptcy. Rough sets theory is a new approach for dealing with the problem of apparent indiscernibility between objects in a set that has had a reported bankruptcy prediction accuracy ranging from 76% to 88% in two recent studies. These accuracy levels appear to be superior to auditor signalling rates, however, the two prior rough sets studies made no direct comparisons to auditor signalling rates and either employed small sample sizes or non‐current data. This study advances research in this area by comparing rough set prediction capability with actual auditor signalling rates for a large sample of United States companies from the 1991 to 1997 time period. Prior bankruptcy prediction research was carefully reviewed to identify 11 possible predictive factors which had both significant theoretical support and were present in multiple studies. These factors were expressed as variables and data for 11 variables was then obtained for 146 bankrupt United States public companies during the years 1991–1997. This sample was then matched in terms of size and industry to 145 non‐bankrupt companies from the same time period. The overall sample of 291 companies was divided into development and validation subsamples. Rough sets theory was then used to develop two different bankruptcy prediction models, each containing four variables from the 11 possible predictive variables. The rough sets theory based models achieved 61% and 68% classification accuracy on the validation sample using a progressive classification procedure involving three classification strategies. By comparison, auditors directly signalled going concern problems via opinion modifications for only 54% of the bankrupt companies. However, the auditor signalling rate for bankrupt companies increased to 66% when other opinion modifications related to going concern issues were included. In contrast with prior rough sets theory research which suggested that rough sets theory offered significant bankruptcy predictive improvements for auditors, the rough sets models developed in this research did not provide any significant comparative advantage with regard to prediction accuracy over the actual auditors' methodologies. The current research results should be fairly robust since this rough sets theory based research employed (1) a comparison of the rough sets model results to actual auditor decisions for the same companies, (2) recent data, (3) a relatively large sample size, (4) real world bankruptcy/non‐bankruptcy frequencies to develop the variable classifications, and (5) a wide range of industries and company sizes. Copyright © 2003 John Wiley & Sons, Ltd.     

解(■~2U)/(■T~2)=A(■~4U)/(■T~2■X~2)+B(■~2U)/(■T■X)+C(■~4U)/(■X~4)的周期问题的精细积分法

对于方程■2U/■T2=A■4U/■T2■X2+B■2U/■T■X+C■4U/■X4的初始值与周期边值问题,利用四阶差分化为关于时间变量的常微分方程组,然后采用精细时程积分法．通过对精细积分法递推过程的误差分析,发现该方法能获得高精度数值结果的根本原因是:数值计算的相对误差不随递推过程的进行而扩散．     

液位检测控制系统设计

本文介绍了单片机和大规模集成电路在工业液位显示、控制中的应用，解决了工业中对液位显示的复杂电路和控制上的单一性，给出了硬件电路和软件设计方法。     

陶粒载体序批式生物膜反应器及其氧传递系数测定

介绍了一种新型的生物膜反应器 :以陶粒为载体的序批式生物膜反应器 .并求出了在设定的工艺条件下的氧传递系数 .结果表明 :本反应器有较强的氧传递输送能力 ,能满足微生物的有机物代谢和降解有机污染物的需要     

CRM和DRP系统的集成分析

随着CRM理念的不断深入，很多企业开始实施CRM系统，以期通过业务流程的重组和CRM系统的实施全面提升企业营销、销售以及客户服务自动化水平。但是由于在系统选型时，很多企业对CRM系统功能产生误解，提出通过CRM系统达到对库存、销售、财务往来的全面管理。然而对于一个跨地区经营产品的企业来讲，这些功能主要在DRP(分销资源计划)系统中体现。更进一步，目前区域性企业中实施的DRP系统由于缺乏充分的客户信息支持，很大程度上制约了供应链中信息共享。无法达到有效缩短提前期和克服牛鞭效应。本文结合CRM和DRP软件的功能定位以及企业信息系统实施现状，分别从CRM和DRP的功能、二者功能的交叉、二者集成的必要性和可行性等方面阐述了二者的集成。     

煤气共采、综合开发探讨

对煤气共采、综合开发作了初步探讨，指出综合开发是山西煤层气开发的首选之路。     

一种战场态势图形指挥系统的多通道整合模型

人机交互技术是实现战场指挥控制系统的核心技术,多通道交互则是实现自然、高效的人机交互的关键技术。在建立多通道战场指挥系统模型的过程中,本文针对多通道整合问题,分析了多通道交互任务的特点,提出了一种基于元动作的多通道整合模型,将多通道任务根据一些关键动作和冗余属性信息分解为一组元动作,整合成功与否以相应元动作特征结构的完整提交为判据,解决了多属性用户动作的任务槽选择问题。使用了事件分类表和元动作槽表,将交互任务知识与多通道整合分开,并在整合过程中采用了多种融合方式相结合的方法,使整合过程能及早生成反馈,又不会产生不必要的回溯。最后给出了基于该模型的交互技术设计规则以及模型示例。     

荣格“个性化”思想对德育实践的启示

近年来,德育实践的滞后严重阻碍了素质教育的实施.通过吸收国外德育研究的成果,目前的德育实践取得了很大的改善,但离培养人内在道德自律体系的目的还有一定距离.荣格的"个性化"思想突出其"整合"的特点,与"自律"的实质相一致,揭示了德育的根本所在.因此,要充分利用集体无意识原型来改善德育实践,引入无意识教育;强化德育对象的自我认识;利用人际互动开展德育实践;培养德育对象的"皈依心境".     

合并高校多校区馆藏资源的整合研究

针对合并高校多校区馆藏资源分散、重复、异构的局面，提出了实现合并高校多校区馆藏资源整合与资源共享的措施，