The new combined model solved the problem of that the e / e model ca n ' t use to simulate the flows that exists phase change , and the e / l model needs infinite computer time to simulate the real flows . in a general way , the new model brings forth - new ideas to us , and it is important to multiphase flows " study and the application in engineering 新的组合法克服了e e法不能模拟存在相变的流场的缺陷和e l法因机时问题而无法模拟真实流场的问题，具有一定的创新性，对多相流理论研究和指导工程实际都具有重大意义。
And a novel systematically method , using linear combination approach to design high order filter , has been proposed . the designed filters can be adapted by adjusting the bias currents , without changing the physical structure . the results of the examples and pspice simulator show the advantages and availabilities of this method 并且提出了多项式线性组合法,采用该方法不但能设计出所要求的高阶电流滤波器,而且能在不改变物理结构的情况下,利用电流控制传送器的特性,调整其偏置电流,实现滤波器输出特性的改变。
At present , there are many achievements of risk analysis and decision - making of huge investment projects , but there are no generally recognized standardization model . combining the project , this paper tries to establish an applied standardization model and make it be applied to the project . and according to character of management of information system , it also underlines development of computer program 在本论文中，首先介绍了敏感性分析，同时结合实际项目，对敏感性分析的优缺点进行了探讨。风险分析是本论文的重点，在对风险因素进行辨识和估计后，共提出三种方法，即离散状态组合法、统计解析法和蒙特卡洛法。
In addition , the thesis considered that the pseudo particle model should be used to simulate the microstructure of the multiphase flows . by study of the microstructure of the multiphase flows , we may get a real and accurate model of the interaction between particle to particle and particle to pseudo particle in the multiphase flows , and then may make a great progress in multiphase flows research by using the new combined model 文中认为，流体“拟颗粒”模型适合于计算模拟流场的微观结构，通过流体“拟颗粒”模型对多相流动微观结构的了解，从而建立颗粒与颗粒间、颗粒与“拟颗粒”间的相互作用模型，并借助本组合法可能实现多相流研究理论质的飞跃。
Firstly , this article discusses the background of the topic , points out its intention and meaning , and it subjectively appraise through the discussion of relative documents in our nation and abroad . secondly , it looks into enterprise microenvironment ' s meaning , content , and the essential factors , then raises the change of these factors effect to enterprise . thirdly , it set up the index system of enterprise microenvironment based on the constitute factors 本文首先讨论了论文背景，指出了论文研究的目的和意义，并对国内外相关研究进行了客观评述；其次，探讨了企业微观环境的内涵和构成的关键要素，并指出各要素变化对企业产生的影响；再次，根据各构成要素，设置了评价企业微观环境的指标体系；最后，在给出了两种微观环境系统的分析方法的基础上，运用广义加权平均组合法建立评价模型，对企业微观环境进行综合评价。
Finally , the thesis employed the new combined model to simulate the dense gas - solid two - phase vertical flows , to simulate the dilute or dense gas - solid two - phase jet flows , and both of them got a satisfied numerical solution . after comparing the numerical results to experimental data , we found that they were quite agreement . it proves that the new combined model is right , accurate and reliable , and it may be suitable to simulate various dense gas - solid multiphase flows 最后，本文利用所提出的新的组合模型，对高浓度气固两相立管流动进行了数值模拟；对稀相和密相气固两相射流进行了数值模拟；两者均得到了满意的数值解；将所得数值结果与相关实验数据进行了比较，两者十分吻合，证明了本组合法在模拟高浓度气固两相流动时的准确性和可靠性，并具有一定的普适性。
