Ti153合金ISM熔炼过程中氮元素的溶解与控制

建立了氮元素溶解到Ｔｉ１５３合金熔体中的热力学模型,并以此计算了氮在Ｔｉ１５３合金熔体中的溶解度,分析了ＩＳＭ熔炼过程中影响氮元素在Ｔｉ１５３合金熔体中溶解的几个因素。结果表明,熔体温度对Ｔｉ１５３合金熔体中氮的溶解度影响较大,而熔化室内氮气分压是决定Ｔｉ１５３合金熔体中氮溶解度的主要因素,需要合理控制,并提出了利用多次抽真空反充氩气以降低熔化室内氮气分压的方法,来进一步降低Ｔｉ１５３合金窝熔体中     

Risk assessment in ERP projects

Conducting Risk Management of Enterprise Resource Planning (ERP) projects is an ambitious task. ERP projects are complex undertakings for business enterprises, as the associated risk factors include myriad technological, managerial, psychological and sociological aspects. Moreover, such factors are often tightly interconnected and can have indirect effects on projects. Such features make Risk Management more difficult, uncertain and important than in traditional projects, especially in the Assessment stage.The aim of this paper is to propose an innovative technique to support Risk Analysis in order to provide a better, more structured and systematic understanding of the major relations amongst various risk factors, on the one hand, and between risk factors and the specific effects associated with ERP projects, on the other. A real case study regarding a multinational company and involving a panel of experts and practitioners is presented to illustrate application of the method.     

3D Magneto-hydrodynamic simulations of Parker instability with cosmic rays

This study investigates Parker instability in an interstellar medium (ISM) near the Galactic plane using three-dimensional magneto-hydrodynamic simulations. Parker instability arises from the presence of a magnetic field in a plasma, wherein the magnetic buoyant pressure expels the gas and cause the gas to move along the field lines. The process is thought to induce the formation of giant molecular clouds in the Galaxy. In this study, the effects of cosmic-ray (CR) diffusion are examined. The ISM at equilibrium is assumed to comprise a plasma fluid and a CR fluid at various temperatures, with a uniform magnetic field passing through it in the azimuthal direction of the Galactic disk. After a small perturbation, the unstable gas aggregates at the footpoint of the magnetic fields and forms dense blobs. The growth rate of the instability increases with the strength of the CR diffusion. The formation of dense clouds is enhanced by the effect of cosmic rays (CRs), whereas the shape of the clouds depends sensitively on the initial conditions of perturbation.     

基于解释结构模型的电价链传动风险评价

基于解释结构模型分析了电价的影响因素,并构建了该风险系统的阶层结构图以及风险传递链,并将各风险链分类。在此基础上对电价链的传动机制进行了定量研究,量化各种影响因素对电价的综合影响,最终得到各影响因素对销售电价影响程度及其排序,为电价的风险管理与风险防范提供决策依据。     

DS-SS通信系统中基于超再生技术的新型宽带接收机的设计

为了在保证传统DS-SS宽带接受机性能指标的基础上进一步降低接收机的复杂度,将超再生技术运用于对直序列扩频信号非相干检测的宽带扩频接收机的设计中,并对其在2.4GH z的ISM波段的宽带应用进行分析,结果表明,本接收机具有良好的性价比。     

基于ISM频段的无线通信中继器的设计

针对ISM频段的无线收发模块工作距离近的缺陷,设计了一种基于ISM频段的无线通信中继器,它能有效地解决这一问题,从而可实现基于ISM频段的无线数据远距离传输.该模块可以方便地嵌入到各种智能仪器仪表中,实现远距离的无线通信功能.     

基于ISM-MICMAC模型的工业园区应急协同影响因素研究

在对工业园区事故进行分析的基础上,根据对工业园区各企业应急救援系统、应急预案和应急体系的相关研究,识别出工业园区突发事件应急协同的11个主要影响因素,即工业园区应急多目标协同、应急目标实现、应急阶段协同、应急过程、组织结构协同、部门协同、职能协同、信息共享、信息系统、应急资源数量和应急资源调度.同时,运用解释结构模型(...     

也谈熔融还原炼铁技术

对现有HIsmelt、COREX和FINEX熔融还原工艺及设备进行了分析研究和综合评价,指出了开发新熔融还原技术的原则,介绍了克服高炉炼铁及COREX、HIsmeh熔融还原法存在的缺点的LSM炼铁工艺,应针对目前存在的问题,开发新的熔融还原炼铁技术。     

基于ISM的制造企业物流模式选择影响因素分析

通过Delphi专家调查法,从文献中提出的对制造企业物流模式选择具有影响的大量因素中筛选出12个主要的因素.再应用解释结构模型法,发现其中的9个是关键因素.进一步分析发现,它们的影响在各个层次上不同.     

基于FANP方法的供应链配送中心评价选择

供应链配送中心的评价选择是供应链管理的重要课题.层次分析法(AHP)只能分析经过大量简化处理的树状结构或者其他理想结构.因此,采用解释结构模型(ISM)建立配送中心评价选择指标体系,用模糊网络分析法(FANP)进行计算分析,对以制造业为主导的供应链配送中心进行评价和选择,不仅考虑了指标的层次关系,也考虑到各层中因素之间的相互关系,解决了对具有网络关系的混合型结构评价指标体系的评价选择问题,克服了层次分析法(AHP)等传统算法的局限,在实际应用中具有很好的效果.