决策树算法在饰品营销中的应用

阐述了饰品企业营销的现状,提出了将数据挖掘技术应用到饰品营销中的方案.在分析决策树算法的基础上,介绍了决策树算法及决策树的构造,并使用该算法对企业客户进行分类及对新客户类型预测,实现对商业数据中隐藏信息的挖掘,且对该挖掘模型进行了验证.     

SynchroFLOW工作流在.NET架构系统下的典型应用

SynchroFLOW作为一个面向工作流的中间件产品,为企业流程再造提供了基础。首先通过分析SynchroFLOW工作流的基本功能和特点,发现SynchroFLOW主要用于Java环境的流程控制,而与.NET架构的应用系统进行直接集成比较困难;其次对具体的应用系统需求进行了分析,提出了一种新的设计思路,即通过标准的WebServices技术,结合代理模式实现.NET架构的应用系统与SynchroFLOW工作流平台的整合;最后,展示了具体的提案审核流程和财务决算审核流程的应用实例图,同时提出了存在的一些问题和下一步的改进方案。     

我国工业计算机发展现状与机遇

我国工业计算机技术发展已走过了几十年的道路,取得了不斐的成绩,工业计算机产业已具有一定的规模,产品在各个行业广泛应用,效益显著。但与国际相比,发展仍有较大差距。本文论述我国工业计算机发展的历程,分析了产业发展现状及发展机遇与挑战。     

Direct Manipulation and Interactive Sculpting of PDE Surfaces

This paper presents an integrated approach and a unified algorithm that combine the benefits of PDE surfaces and powerful physics-based modeling techniques within one single modeling framework, in order to realize the full potential of PDE surfaces. We have developed a novel system that allows direct manipulation and interactive sculpting of PDE surfaces at arbitrary location, hence supporting various interactive techniques beyond the conventional boundary control. Our prototype software affords users to interactively modify point, normal, curvature, and arbitrary region of PDE surfaces in a predictable way. We employ several simple, yet effective numerical techniques including the finite-difference discretization of the PDE surface, the multigrid-like subdivision on the PDE surface, the mass-spring approximation of the elastic PDE surface, etc. to achieve real-time performance. In addition, our dynamic PDE surfaces can also be approximated using standard bivariate B-spline finite elements, which can subsequently be sculpted and deformed directly in real-time subject to intrinsic PDE constraints. Our experiments demonstrate many attractive advantages of our dynamic PDE formulation such as intuitive control, real-time feedback, and usability to the general public.     

分布虚拟环境中视景系统的视点变换与图像平滑的研究

在以ＤＩＳ（分布式交互仿真）为标准的ＤＶＥ（分布虚拟环境）系统构成的大规模虚拟战场环境中,视景系统由于其在观察战场、评估作战计划等方面占据了不可替代的重要地位,所以在虚拟战场中生成视景的可信性和可靠性日益受到人们的广泛重视。本课题对虚拟战场视景系统的视点变换、延时及图像平滑等算法进行了分析和研究。     

访问控制原理与实现

随着计算机与网络系统的迅速发展,计算机系统提供的功能越来越强,同样,对于系统安全保护的要求也越来越高,系统中有众多的软件和硬件需要保护。例如硬件有各种内存、缓存,各种外部设备和接口等。软件有操作系统、文件、堆栈等。为保护资源的安全,早期通过对要保护的文件读写设置口令,用户只能利用口令访问该文件实现。这样用户需了解每个要访问文件的读写口令,很     

一种新型的多栅极SET/MOS管混合电路

基于多栅极SET的库仑振荡和相移特性,以及SET和MOS管的互补特性,提出了一种新型的多栅极SET/MOS管混合电路.介绍了该电路的结构和工作原理,并利用SPICE进行了仿真分析.仿真结果表明:提出的新电路可以作为取样电路使用,也可以作为一个基本的算术门用于多值逻辑电路系统.     

基于查询的关系模式到XML模式转换的新算法

本文给出了一个基于查询的关系模式（RDB）到XML模式转换的新算法。分析了查询模式,并且通过列间的相等合并来抽出隐式参照完整性。该算法不仅反映了外在参照完整性,还反映了RDB到XML的隐式参照完整性。     

A new neural network algorithm for planarization problems

To deal with the planarization problem widely used in many applications including routing very-large-scale integration （VLSI） circuits, this paper points out that only when its vertices are arranged in some specific order in a line can a planar graph be embedded on a line without any cross connections or cross edges. Energy function is proposed to meet the need of embedding a graph on a single line and route it correctly. A Hopfield network is designed according to the proposed energy function for such embedding and routing. The advantage of the proposed method is that it not only can detect if a graph is a planar one or not, but also can embed a planar graph or the maximal planar subgraph of a non-planar graph on a single line. In addition, simulated annealing is employed for helping the network to escape from local minima during the running of the Hopfield network. Experiments of the proposed method and its comparison with some existent conventional methods were performed and the results indicate that the proposed method is of great feasibility and effectiveness especially for the planarization problem of large graphs.     

3D-QSAR and molecular docking studies of selective agonists for the thyroid hormone receptor beta

Three-dimensional quantitative structure-activity relationship (3D-QSAR) models were developed using comparative molecular field analysis (CoMFA) and comparative molecular similarity analysis (CoMSIA) on a series of agonists of thyroid hormone receptor beta (TRbeta), which may lead to safe therapies for non-thyroid disorders while avoiding the cardiac side effects. The reasonable q(2) (cross-validated) values 0.600 and 0.616 and non-cross-validated r(2) values of 0.974 and 0.974 were obtained for CoMFA and CoMSIA models for the training set compounds, respectively. The predictive ability of two models was validated using a test set of 12 molecules which gave predictive correlation coefficients (r(pred)(2)) of 0.688 and 0.674, respectively. The Lamarckian Genetic Algorithm (LGA) of AutoDock 4.0 was employed to explore the binding mode of the compound at the active site of TRbeta. The results not only lead to a better understanding of interactions between these agonists and the thyroid hormone receptor beta but also can provide us some useful information about the influence of structures on the activity which will be very useful for designing some new agonist with desired activity.