Single-Trial Estimation and Analysis of PVEP Based on Independent Component Analysis

IntroductionPattern- reversal visual evoked potential(PVEP) iswidely used in clinical diagnosis and surgery,because it can reflect the result of the visualprocess consisting of light perception at theretinal,transmittance along the visual pathways,and the final cortical presentation. In practice,thePVEP is a transient signal contaminated by theongoing background electroencephalograph(EEG)and othernoiseswith poorsignalto noise ratio. Toobtain a clear PVEP complex,the ensembleaveraging met…     

Application of Kernel Independent Component Analysis for Multivariate Statistical Process Monitoring

In this research,a new fault detection method based on kernel independent component analysis (kernel ICA) is developed.Kernel ICA is an improvement of independent component analysis (ICA),and is different from kernel principal component analysis (KPCA) proposed for nonlinear process monitoring.The basic idea of our approach is to use the kernel ICA to extract independent components efficiently and to combine the selected essential independent components with process monitoring techniques.I2 (the sum of the ...     

木材干燥应力模型的研究

将木材干燥过程中的总应变分为自由干缩、瞬时弹性应变、黏弹性应变和机械吸附应变，并在此基础上建立了木材干燥应力模型。应用此模型，只需要在干燥过程中测量出木材的分层含水率和干缩率，便可较准确计算出木材干燥应力应变。通过对30 mm厚马尾松板材干燥过程中总应变实际测量值与模型计算值的比较，验证所建模型计算出的木材干燥应力应变具有较高的准确性。     

Analysis of Interaction Factors between Two Piles in Layered Soils

A rigorous analytical method is presented,which takes into account the pile stiffening effects,using the theory of the transfer matrix-bottom rigidity for calculating the interaction factor between two identical piles in multi-layered soils subjected to vertical loads.Following the technique proposed by Muki and Sternberg,the problem is decomposed into extended soil layers and two fictitious piles characterized respectively by Young's moduli of the layered soils and those of the differences between the piles and the layered soils.The unknown axial forces along fictitious piles are determined by solving a Fredholm integral equation of the second kind,which imposes the compatibility condition that the axial strains of the fictitious piles are equal to those corresponding to the centroidal axes of the extended layered soils.The real pile displacements can be calculated based on the determined fictitious pile forces,and finally,the desired pile interaction factors may be obtained.Selected results from parametrical studies are presented to confirm the validity of the proposed approach and portray the influence of the governing parameters on the pile interaction.     

一种基于Tuscany SCA的分布式SCA应用模型

提出了一种基于Tuscany SCA的分布式SCA模型.该模型的分布性主要表现为一个SCA应用的一个域包含多个结点,每个结点分别运行在一个单独的JVM上.给出了模型实现的关键流程,主要包括:分布式SCA应用如何开发和分割、结点的软件配置以及SCA应用的部署和运行的程序实现方式.通过一个分布式计算实例(云南地区的地震应力...     

Community Detection in Disease-Gene Network Based on Principal Component Analysis

The identification of communities is imperative in the understanding of network structures and functions.Using community detection algorithms in biological networks, the community structure of biological networks can be determined, which is helpful in analyzing the topological structures and predicting the behaviors of biological networks. In this paper, we analyze the diseasome network using a new method called disease-gene network detecting algorithm based on principal component analysis, which can be used to investigate the connection between nodes within the same group. Experimental results on real-world networks have demonstrated that our algorithm is more efficient in detecting community structures when compared with other well-known results.     

基于问卷调查的新农村居住环境满意度评价:以房山区试点村为例

随着社会主义新农村建设进程的加快,农村的生活环境得到了较大的改善.为了更加深入、更有针对性地进行北京市新农村建设,本文以北京市远郊山区房山区为研究对象,选取了青龙湖镇庙耳岗村和长阳镇保合庄村这两个典型村,从农村居民的角度出发设计了问卷调查并实地考察了农村居民对居住环境的满意度,在此基础上运用主成份分析法,归纳出影响村民满意度评价的主要因子,力求为北京市远郊区新农村居住环境建设的具体实施提供理论依据,以及为全国其他城市郊区新农村建设的具体实施提供借鉴.     

平面复杂机构速度分析的速度瞬心法

利用速度瞬心法，通过有目的地找出相关瞬心和目标瞬心，解决了多自由度的平面机构速度分析问题。     

软件组合复用方式的思辩

提出了组合复用方式的两种实方法：即配即用方式和基于用户图形界面的组装台式，并探讨了组装方式的优点和局限性。     

柴黄颗粒的红外指纹图谱研究

分别采用相似度、聚类分析法和基于主成分分析的投影判别法对柴黄颗粒红外图谱的一致性进行了考察,结果显示30个柴黄颗粒样本的红外图谱一致性良好,采用平均值法建立了柴黄颗粒的红外指纹图谱。