A Comparative Study of the Application of Electronic Data Interchange and Internet Technology to Business Process Reengineering

This study investigates the role of information technology in business process reengineering (BPR) implementation. To increase the prospects of successful BPR implementation, the role of information technology in BPR should be thoroughly investigated to find the logical relationships between information technology and BPR. This study used a survey methodology to gather information from 72 BPR programs. The results show that different information technologies, such as those examined in this study, electronic data interchange (EDI) and Internet, provide different capabilities and can be useful in different ways and for different purposes. Lack of attention to these relationships may be due to the unacceptable high implementation failure rate in the previous BPR efforts,     

电网调度模型与直接优化算法

研究ｍ个电站ｎ个用户的电网调度问题，建立电力调度的二次平衡模型，证明关于元的直接优化原理并给出优化算法，用数据实例给出了计算过程．     

光纤测量表面粗糙度的研究

物体表面的反射散射光的强度反映了表面粗糙度的信息 ,即反射散射光的强度与表面的粗糙程度和探测光纤与反射表面之间的距离有关 .利用光纤将被测表面的反射散射光接收 ,测出了反射散射光强度与距离、粗糙度的关系 ,用最佳拟和曲线法计算出 Ra 与光强之间的关系     

Process optimization of reaction of acid leaching residue of asbestos tailing and sodium hydroxide aqueous solution

Silica is the major component of the acid leaching residue of asbestos tailing.The waterglass solution can be prepared by the reaction of the residue with sodium hydroxide aqueous solution.Compared to the high temperature reaction method,this process is environmental friendly and low cost.In this paper,the reaction process of the residue and the sodium hydroxide aqueous solution is optimized.The optimum reaction process parameters are as follows:the usage of sodium hydroxide is 26.4 g/100 g acid leaching residue,the reaction temperature is 90℃,the reaction time is 1 h,and the ratio of the liquid/solid is 2.0.The significance sequence of the process parameters to the alkali leaching reaction effect is the usage of sodium hydroxidethe ratio of the liquid/solidthe reaction timethe reaction temperature.The significance sequence to the leaching ratio of SiO2 is the ratio of the liquid/solidthe usage of sodium hydroxidethe reaction timethe reaction temperature.The significance sequence to the modulus of the sodium silicate is the ratio of the liquid/solidthe usage of sodium hydroxidethe reaction timethe reaction temperature.Under the optimum conditions,the leaching ratio of the SiO2 is 77.5%,and the modulus of the sodium silicate is 3.15.The XRD analysis result indicates that the major components of the alkali leaching residue are serpentine,talc,quartz and some albite.     

Effect of Fe(Ⅲ) impurity on the electrochemical performance of LiFePO_4 prepared by hydrothermal process

Lithium iron phosphate(LiFePO4)was synthesized from LiOH,FeSO4 and H3PO4 by a hydrothermal process at 180℃.The samples were characterized by X-ray diffraction,scanning electron microscopy and chemical analysis.Electrochemical performance of the samples was tested in terms of charge-discharge capacity and cycling behavior.The results indicated that Fe(Ⅲ) impurity had obviously effect on the electrochemical properties of LiFePO4,and the formation of Fe 3+ was caused by the oxidation of Fe 2+ in the dissolving...     

Ruin Probability in Linear Time Series Model

This paper analyzes a continuous time risk model with a linear model used to model the claim process. The time is discretized stochastically using the times when claims occur, using Doob‘s stopping time theorem and martingale inequalities to obtain expressions for the ruin probability as well as both exponential and non-exponential upper bounds for the ruin probability for an infinite time horizon. Numerical results are included to illustrate the accuracy of the non-exponential bound.     

Empirical Research on User Acceptance of Mobile Searches

The mobile search, a combination of a web search engine and a mobile communication system, is viewed as the most influential application in the 3G era. Therefore, mobile search service providers are eager to know which factors most influence user acceptance of mobile searches. Based on the characteristics of mobile searches and a review of previous information technology acceptance research, this study integrates the task technology fit model and the unified theory of acceptance and use of technology model to develop a mobile search acceptance model and empirically tests this model. This study finds that, for mobile searches, the performance expectancy, social influence, and perceived cost all significantly influence use intention and the performance expectancy increases with the increasing user’s experience and higher task technology fit degree. The effort expectancy is found to not affect the use intention of mobile searches and the users’ gender does not have a significant moderating effect on the use intention. The results are then used to develop suggestions for mobile search providers to promote their application and development.     

关于无穷维M()BIUS变换

首先得到无穷维CLIFFORD数的一些性质,然后利用所得结果将AHLFORS关于双曲 M(O|¨)BIUS变换和严格抛物M(O|¨)BIUS变换及WATERMAN关于M(O|¨)BIUS变换迹的有关讨论推广到无穷维的情形．     

再生水工艺中曝气生物滤池的启动特性

对再生水工艺中曝气生物滤池的启动进行了试验研究,试验结果显示。启动8天后,滤柱出水的COD稳定在40 mg/L,去除率为60%;16天后,氨氮去除率稳定在54%左右:滤池出水水质可达到市政杂用水要求。     

交通运输建设项目综合评价方法及其投入产出模型

对交通运输建设项目进行可行性研究，应考虑交通运输建设项目所带来的地区经济效益，提出了利用投入产出方法建立的地区经济效益的模型。根据该模型与数学规划方法，建立了改进的地区间投入产出优化模型。并以京津地区为实例，定量计算了京津塘高速公路和北京至天津第三条铁路的地区经济效益，得到了有参考价值的结果。计算结果说明，所提出的综合评价方法和模型是可行的、有效的。