The degree of subdivision of the decision attribute value directly influences upon the approximation quality of rules,accuracy of approximation classification,core attributes and information entropy in decision systems based on rough set theory.
对基于粗糙集的决策系统,从理论上分析了决策数据细化的程度对规则近似质量、近似分类精度、核属性和信息熵的影响。
This paper proves that upper approximation quality worsens as the feature set is pruned down,and puts forward an algorithm for feature extraction using upper approximation.
该文针对特征提取中存在的噪声污染问题 ,分析了采用粗集上近似进行特征提取可以处理含有噪声数据的原因 ;证明了上近似质量随着条件属性的压缩而降低 ,提出了一种基于集合上近似的质量来进行特征提取的算法 ,该算法以集合上近似质量为迭代准则 ,通过设置一阈值来求取θ -约简 ,得到所要提取的特
narrow resonance infinite mass approximation
窄共振无限质量近似
narrow resonance infinite mass of the absorber atom
吸收体原子窄共振无限质量
isobaric analog resonance
同质异位素相似共振
nuclear magnetic resonance massmetric flowmeter
核磁共振质量流量计
An Approximate Calculation on Quality Factors of the Quartz Crystal Oscillator
石英晶体振荡器品质因素的近似计算
1/3 Subharmonic Resonance of Double Mass Torsional Vibration System;
双质量扭振系统的1/3次亚谐共振
Separation of variables for vibration problems of infinite and semiinfinite strings
无限长与半无限长弦振动的分离变量解法
Quality control and quality assurance factors in low field MRI
低场磁共振成像质量控制与质量保证因素初探
A Study on Quality Assurance of Brain Functional Magnetic Resonance Imaging;
脑功能核磁共振成像的质量控制研究
Determination of Proteins by Enhanced Resonance Light Scattering with Quercetin;
槲皮素共振光散射法测定微量蛋白质
Technical Characteristics and Quality Control Strategies of MRI at 3 Tesla
3T磁共振的特点及其质量控制策略
Random Phrase Approximation in the Low-dimensional Quantum Anisotropy Heisenberg Model;
无规相近似下低维各向异性的量子海森堡模型
Equation (4-198) yields a first approximation for the change in the natural frequency of vibration.
方程（4－198）给出了一级近似下的固有振动频率的改变量。
Establishment and Approximate Solution to Horizontal Equation in Case of Nonlinear Oscillation of Plane Pendelum;
平面摆非线性振动水平分量方程的建立及其近似解
The Generalized Variational Principle and Approximate Calculation for Beams and Plates on Half Space Elastic Foundatoins;
弹性半无限体地基上基础梁、板的广义变分原理及近似计算
Analyse The Infinitude of the Blue Close to Transparence from Subculture: Poetical Representation of Decadence;
颓废的诗意表征——试从“亚文化”角度分析小说《无限近似于透明的蓝》
An Algorithm of Attributes Reduction in Decision Table Based on the Approximation Classified Quality;
基于近似分类质量的决策表属性约简算法
Some Research about the Property of Refined Approximate Eigenvector Problems
关于精化近似特征向量的一些性质研究