Through use of rough set , case attributes were reduced and the importance sequence for attributes was obtained , which was employed to build case hierarchy clustering model and allocate attributes weights 基于粗糙集对事例属性进行约简，获得了事例属性的重要度排序，以此建立了事例库的层次聚类模型和分配特征属性权重值。
Along with the modeling method , business process model , function model , class model and business component system model ( bcsm ) have been built , which are the different view to conception model 按照此方法，分别建立了业务过程模型、功能模型、领域类模型和业务构件系统模型( bcsm ) ，它们从不同的角度描述了概念模型。
It is desirable to model them by introducing distributed delays . we present some new conditions ensuring global exponential stability of the equilibrium point by utilizing lyapunov functionals and constant variant method 本文应用传统的lyapunov泛函法及常数变易法研究了这类模型的全局指数稳定性，获得了几个充分条件。
While companies are using these tools to slash the costs of producing eerything from airliners to antibiotics , researchers in houston are using them to refine their search for the genetic causes of disease 当公司利用这些来削减用于制造（从客机到抗生素几乎一切）的费用时，休斯敦的研究人员正用此类模型来寻找疾病的遗传因素。
It is found from the comparison that the arch type models with stable paretian innovation is more capable to capture characteristics of financial time series than arch type models with normal and student ' s t innovations 通过模型的比较分析，得到基于稳定分布的arch类模型比基于正态分布、 t分布的arch类模型能更好地刻划金融时间序列的特征。
In this article , we apply em algorithm to estimating the values of the parameters of nhpp models . the estimating accuracy may be increased by this way . so the result software reliability analysis may be improved by this way too 最后本文应用文献[ 33 ]中介绍的em算法于nhpp类模型的参数估计,以提高估计的精度,从而提高软件可靠性分析的精确程度。
