An expert system to classify microarray gene expression data using gene selection by decision tree

Gene selection can help the analysis of microarray gene expression data. However, it is very difficult to obtain a satisfactory classification result by machine learning techniques because of both the curse-of-dimensionality problem and the over-fitting problem. That is, the dimensions of the features are too large but the samples are too few. In this study, we designed an approach that attempts to avoid these two problems and then used it to select a small set of significant biomarker genes for diagnosis. Finally, we attempted to use these markers for the classification of cancer. This approach was tested the approach on a number of microarray datasets in order to demonstrate that it performs well and is both useful and reliable.     

虚拟仪器的网络应用及实现

在研究了LabVIEW 7.0网络通信功能的基础上,利用NI公司的PCI-6111数据采集卡,以ASP为脚本环境、以MySql Server为数据库服务器设计并实现了基于校园网的网络虚拟实验平台.该平台较好地利用了虚拟仪器的网络功能,做到了资源共享,实现了网络远程教育与研究.     

PROFIBUS-DP现场总线在轧机过程控制中的应用

分析了PROFIBUS现场总线技术的主要特点；结合工程实例，介绍了基于PROFIBUS现场总线的轧机控制系统的软、硬件配置以及两者之间接口的实现方法。     

新生注册管理系统的实现

根据高校新生注册管理系统的特殊性及复杂性 ,应用数据库技术及信息安全等理论 ,提出了 1种完善的新生注册体系结构 ,并介绍了实现新生注册系统的关键问题和处理过程。     

实施在线监控,科学构建环境监管平台

本文以空气质量检测系统（简称AQMS）为例,探讨了通过建设在线自动监控系统来构建科学的环境监管平台,以提高厂区环境监管水平,推进企业环境管理自动化、信息化、科学化建设。     

Direct Digital Manufacturing Industry Ascendant

The paper introduces the origin of the word of Direct Digital Manufacturing and other forms of address, and the working principles of Direct Digital Manufacturing technology and major types of the technology, hard- ware and software development, use of materials, applications, market growth and its development prospects. Focused presentations of Direct Digital Manufacturing （additive manufacturing） compared to traditional mechani- cal manufacturing industry in the use of prices, processing speed, reliability and cost advantages and characteris- tics. Particularly the significant challenges and competitiveness of Direct Digital Manufacturing technology in the processing of any complexity created directly the number of objects, internal structure and channel function, as well as the shape of the chassis components and structure of the matching and optimization.     

Multi-objective energy management for PHEV using Pontryagin's minimum principle and particle swarm optimization online

Dear editor, Plug-in hybrid electric vehicles(PHEVs),which can be charged through an external power grid,have been regarded as one of the research areas for the...     

浅析技改项目的管理

为保证技术改造项目在计划编制、项目设计和项目实施方面的质量并顺利实施,实现技术改造目标,坚持项目计划来源于平时、项目设计从实际出发、项目实施服从于设计的原则,着重从项目储备申报、设计、实施等诸环节做好技术改造管理工作。     

优化算法在可靠指标计算精度中的应用

可靠指标的计算方法很多,但对于随机变量较少且非线性的功能函数,有些方法迭代不收敛,但可通过优化方法计算可靠指标β,并与其他计算方法进行比较,结果证明,优化方法原理简单,计算效率与结果准确度较高.     

基于空间矢量调制的直接功率控制PWM整流器研究

分析了PWM整流器基于空间矢量调制的直接功率控制(DPC-SVM)的原理,对三相控制系统的各个部分进行了详细的阐述.该控制结构为直流输出电压外环,功率控制内环.利用Matlab/SimuLink软件建立系统模型进行仿真研究,得到了各个电气量的实时波形.仿真结果表明,该方法控制效果优异,电流畸变小,具有良好的动静态性能,系统能够很好地实现有功功率和无功功率的控制,同时确保输入侧功率因数为1,方案切实可行.