医学信息数据仓库模型的构建与数据挖掘

分析了数据库技术在医学信息处理中的现状及问题,介绍了数据仓库及在此基础上产生的数据挖掘技术,重点介绍了如何利用现有的医学信息资源建立基于数据仓库模型的医学信息数据库,并运用数据挖掘技术抽取数据库中数据隐藏的规律,提高医学信息的利用率.     

面向药品决策支持系统的数据仓库模型设计

医院药品的业务庞杂,数据集成与分析不完善,缺少信息全面、集成的数据仓库系统。研究医院药品数据,运用“业务维度生命周期法”进行数据仓库项目的设计、开发和部署。解决的问题有：创建数据仓库总线结构,建立主题模型,使用维度建模来进行逻辑建模,数据存储的物理设计,数据转储与开发。总体逻辑结构模型设计清晰,构建方法新颖,给出一个较好的医院药品数据仓库的分析模型。     

基于物候特征的盐渍化信息数据挖掘研究

盐渍化是影响植被和作物长势的重要因素,精确反演盐渍化的时空分布信息至关重要。基于MOD13A1-NDVI数据反演生长季开始日期(SOS)、生长季结束日期(EOS)、生长季长度(LEN)等物候参数和计算出能高精度反演盐渍化空间分布的多种植被指数、盐分指数、地形指数、干旱指数等参数后作为BP-ANN人工神经网络的输入因子来反演盐渍化信息,同时按照植被类型和地貌类型进行分区来反演盐渍化信息,以探讨盐渍化受植被和地貌类型的影响。主要结论如下:(1)盐渍化的形成受多种因素的影响,与物候参数大多呈非线性关系,不能单纯的以某拟合公式来进行表达,需要借助人工神经网络超强的非线性拟合能力来反演盐渍化信息。(2)通过深入挖掘植被物候信息,在融入物候参数后的反演精度显著提高。可决系数R2从0.68(非物候参数)增加到0.79(包括物候参数),但是需要加入地形、影像数据和土壤水分等方面的信息来更加精确的反演盐渍化信息。生物累积量指标LSI(Large seasonal integral)和SSI(Small seasonal integral)能够很好的表征盐渍化的信息。(3)划分植被类型后的盐渍化提取精度进一步提高,可决系数R~2达到了0.88。(4)以地貌特征作为类型分区后,反演结果的R~2达到了0.85,精度较高,比以植被类型作为分区的精度略小。高程较低区域的盐渍化现象普遍较重,盐渍化程度受到地形和地貌因素的影响显著。(5)农用地区域多为非盐渍化和轻度盐渍化地,稀疏植被区多为重盐渍化地。研究区的非盐渍化和轻盐渍化地、中盐渍化地和重度盐渍化地比例分别为53.42%,13.71%,32.87%。以上的研究结果提出了一种融合物候信息和非物候参数来反演盐渍化信息的方法,进行深入的协同植被物候监测盐渍化信息方面的数据挖掘,在融入了物候参数后,盐渍化的预测精度显著提高。     

医学信息的虚拟存储及其系统模型的构建

本文引入了医学信息的虚拟存储新理念,用以解决海量医学数据的存储难题,并提出了在上海广电集团所建立的上海远程医学网络平台上的具体设计方案,包括建立虚拟映射,数据访问中数据传输技术的研究以及存储管理的设想。     

基于网格的医学信息平台设计

针对目前医学信息应用模式的局限性,提出一种基于网格的平台技术,促进网络环境下的医学资源共享和互用。其中采用面向网格工具包的中间件设计,简化了服务集成和调用。实验模型的建立验证平台的可行性及实用价值。     

医学信息的远距离传输

一、引言 由于当代生物医学与电子——信息科学突飞猛进的发展,以及全球医疗水平在国家之间、地区间和城乡间的差距日益扩大,科学家正在探索采用各种先进的通信网络来实现远程医疗,用来将发达地区的先进医疗技术快速地输送到偏远、落后地区,以解决人类自身对医疗保健的迫切需要。同时先进的通信网络也为生命科学研究及医学临床实践间建立了学术交流、远程诊断与监护、急救、会诊、     

基于Snake模型的医学图像分割

基于Snake模型的图像分割技术是近年来图像处理领域的研究热点之一。Snake模型承载上层先验知识并融合了图像的底层特征,针对医学图像的特殊性,能有效地应用于医学图像的分割中。本文对各种基于Snake模型的改进算法和进化模型进行了研究,并重点梳理了最新的研究成果,以利于把握基于Snake模型的医学图像分割方法的脉络和发展方向。     

基于数据挖掘的门诊信息资源分析

目的：随着各级医院信息化建设的不断加强,医院的信息化水平也日益提高。目前各医院都有自己完善的信息化系统,在日常的门诊中,信息化系统积累了大量的门诊就诊数据,但长久以来这部分数据只是处于低层次的应用。对数据的深层次分析、加工以及对医院管理层的决策支持能力较弱。面对着这些宝贵的数据,医院迫切需要数据挖掘和分析工具从积累的就诊数据中分析出更深层次的、高价值的信息,从而为医院的管理决策提供高价值的决策信息。方法：以聚类算法进行数据挖掘建模,对某院门诊信息资源中有用字段进行挖掘分析。结果：根据数据挖掘模型进行挖掘分析,对有价值字段进行聚类分析,得到相关字段数据挖掘结果。结论：将得到相关字段数据挖掘结果进行分析,并将所分析的结果在医院管理决策和医疗质量管理等方面的应用进行探讨。     

加入WTO对医学信息服务的影响

探讨了我国加入WTO后给医学图书信息事业带来的挑战和机遇,提出了振兴事业的策略。     

加入WTO对医学信息服务的影响

探讨了我国加入WTO后给医学图书信息事业带来的挑战和机遇,提出了振兴事业的策略。     

Data mining in medical time series.

This article proposes a modular, computer-based methodology to describe and compare medical problems using data mining methods. The methodology focuses on a mathematical formulation of typical classification problems, systematic extraction of interpretable features from time series, and an evaluation adapted to problem-specific preferences and limitations (computational power, interpretability, etc.). The approach is applied to instrumented gait analysis and to the individual design of myoelectric controllers for hand prostheses.     

Data mining the protein data bank: residue interactions

The protein databank contains a vast wealth of structural and functional information. The analysis of this macromolecular information has been the subject of considerable work in order to advance knowledge beyond the collection of molecular coordinates. This article presents a method that determines local structural information within proteins using mathematical data mining techniques. The mine program described returns many known configurations of residues such as the catalytic triad, metal binding sites and the N-linked glycosylation site; as well as many other multiple residue interactions not previously categorized. Because mathematical constructs are used as targets, this method can identify new information not previously known, and also provide unbiased results of typical structure and their expected deviations. Because the results are defined mathematically, they cannot indicate the biological implications of the results. Therefore two support programs are described that provide insight into the biological context for the mine results. The first allows a weighted RMSD search between a template set of coordinates and a list of PDB files, and the second allows the labeling of a protein with the template results from mining to aid in the classification of this protein.     

Genomic comparison using data mining techniques based on a possibilistic fuzzy sets model

Current copiousness of genomic information stored in biological databases [Mar Albà, M., Lee, M., Pearl, D., Shepherd, F.M.G., Martin, A.J., Orengo, N., Kellam, C.A., 2001. P. VIDA: a virus database system for the organisation of virus genome open reading frames. Nuleic Acids Res. 133-136] makes ultimately feasible the proposal for an application of knowledge management aimed to discover general rules in subcellular phenomena. The goal of this work is primarily to discover relationships between genes by microarray analysis. The tools exploited come from clustering techniques and are mainly based on Knowledge Discovery in Databases (KDD) concepts [Fayyad, U., Piatetsky-Shapiro, G., Smyth, P., 1996. From data mining to knowledge discovery in databases. AI Magazine 17(3), 37-54]. Starting from a data set, each element can be represented by a characteristic matrix, which sums up all data attributes. In this case data mining is oriented to perform a Pattern Recognition of related sequences, hidden in databases [Hand, D.J., Nicholas, A., 2005. Heard finding groups in gene expression data. J. Biomed. Biotechnol. 215-225]. Following a bottom up approach, the next refinement is to compare retrieved data to gather similar features, by dedicated clustering algorithms [Kaufman, L., Rousseeuw, P.J., 1990. Finding groups in data. An Introduction to Cluster Analysis. John Wiley & Sons, New York; Forman, G., Zhang, B., 2000. Distributed Data clustering can be efficient and exact HP. Laboratories Palo Alto HPL-2000, p. 158], driven by fuzzy logic, allowing us to perceive by intuition a common denominator for various genomic families and to anticipate likely future developments.     

Data mining the protein data bank: automatic detection and assignment of carbohydrate structures

Knowledge of the 3D structure of glycans is a prerequisite for a complete understanding of the biological processes glycoproteins are involved in. However, due to a lack of standardised nomenclature, carbohydrate compounds are difficult to locate within the Protein Data Bank (PDB). Using an algorithm that detects carbohydrate structures only requiring element types and atom coordinates, we were able to detect 1663 entries containing a total of 5647 carbohydrate chains. The majority of chains are found to be N-glycosidically bound. Noncovalently bound ligands are also frequent, while O-glycans form a minority. About 30% of all carbohydrate containing PDB entries comprise one or several errors. The automatic assignment of carbohydrate structures in PDB entries will improve the cross-linking of glycobiology resources with genomic and proteomic data collections, which will be an important issue of the upcoming glycomics projects. By aiding in detection of erroneous annotations and structures, the algorithm might also help to increase database quality.     

Data mining of the GAW14 simulated data using rough set theory and tree-based methods

Rough set theory and decision trees are data mining methods used for dealing with vagueness and uncertainty. They have been utilized to unearth hidden patterns in complicated datasets collected for industrial processes. The Genetic Analysis Workshop 14 simulated data were generated using a system that implemented multiple correlations among four consequential layers of genetic data (disease-related loci, endophenotypes, phenotypes, and one disease trait). When information of one layer was blocked and uncertainty was created in the correlations among these layers, the correlation between the first and last layers (susceptibility genes and the disease trait in this case), was not easily directly detected. In this study, we proposed a two-stage process that applied rough set theory and decision trees to identify genes susceptible to the disease trait. During the first stage, based on phenotypes of subjects and their parents, decision trees were built to predict trait values. Phenotypes retained in the decision trees were then advanced to the second stage, where rough set theory was applied to discover the minimal subsets of genes associated with the disease trait. For comparison, decision trees were also constructed to map susceptible genes during the second stage. Our results showed that the decision trees of the first stage had accuracy rates of about 99% in predicting the disease trait. The decision trees and rough set theory failed to identify the true disease-related loci.     

Data mining approach identifies research priorities and data requirements for resolving the red algal tree of life

Background  

The assembly of the tree of life has seen significant progress in recent years but algae and protists have been largely overlooked in this effort. Many groups of algae and protists have ancient roots and it is unclear how much data will be required to resolve their phylogenetic relationships for incorporation in the tree of life. The red algae, a group of primary photosynthetic eukaryotes of more than a billion years old, provide the earliest fossil evidence for eukaryotic multicellularity and sexual reproduction. Despite this evolutionary significance, their phylogenetic relationships are understudied. This study aims to infer a comprehensive red algal tree of life at the family level from a supermatrix containing data mined from GenBank. We aim to locate remaining regions of low support in the topology, evaluate their causes and estimate the amount of data required to resolve them.