查询词典 rough calculation

After a brief summary on data mining and rough set theory, the research works in the thesis can be descript as follows: 1. To the problem that finding rules in enormous data is very timeconsumable and the expansibility of existed algorithms is not very good, the thesis proposes a new method to discompose large data table based on the concepts of positive region and the importance of attribute in rough set theory.

Rough集理论是一种新型的处理不确定性知识的数学工具，围绕着数据挖掘领域存在的问题，本文利用Rough集理论与Rough分析工具，提出若干解决方案，同时在具体处理问题过程中引入了信息理论、因子分析等方法，与Rough分析结合使用，讨论了Rough集技术在知识发现、关联规则挖掘、模式分类以及数据清洗等问题中的应用。

Then, we study Rough Set Theory approach to KDD, develop two algorithms for deriving Reduct and propose the integration of domain knowledge into Rough Set Theory to mining multiple-level rules.

本文在分析了传统的关联规则挖掘算法的基础上，给出了几个挖掘算法和一个递增修正算法；提出了模糊关联规则的概念及其挖掘算法；研究了结合背景知识的多层次关联规则的挖掘方法。

Chapter 2 is started from the basic theory of elastodynamics, the zero and the first order reflection and transmission coefficients of rough interface are derived in theory, and some numerical examples are given. Also dispersion characters of diffraction waves are discussed in the case of micro-rough interface in deep layers.

第二章从弹性动力学的基本理论出发，通过求解波动方程的定解问题，从理论上导出了地震波在粗糙界面上的零阶和一阶反射透射系数，并给出了数值算例；该章还讨论了深层微粗糙界面的绕射波的频散特征。

The main procedures of the body are conducted as the following:First, this article reviewed the Rough Set elementary theory, the decision information system and the expansion of the Rough Set model.

本文的主要研究工作如下：首先，本文回顾了Rough集的基本理论、决策信息系统和Rough集模型的扩展。

The preparation process of equisetum pratense total alkaloid includes the following steps: coarse pulverizing equisetum pratense to obtain rough powder, methyl alcohol percolation to obtain percolate, recovering methyl alcohol, concentrating, degreasing by means of petroleum ether, alkalifying concentrate, CHCl3 extracting, soda lye washing, neutral water washing, recovering CHCl3 to obtain rough alkaloid, adsorption by using silica gel column, eluting, recovering solvent so as to obtain refined EPR.

该发明是通过两个步骤来实现的：第一步，提取草问荆总碱，流程：草问荆粗粉――渗漉液――浓缩液(析胶、石油醚脱脂、氨水碱化)――碱化浓缩液(CHCl3萃取)――CHCl3层――CHCl3液(回收CHCl3)――粗生物碱――吸附硅胶柱――精致EPR。第二步，选择实验试剂、仪器、用小鼠作为实验对象，进行中枢神经系统实验，研究作用及作用机制。

Based on rough set theory, research in this paper mainly focuses on mining rules from decision system.Based on the research of the basic concepts of rough set, we deeply analysis and discuss the approximation set algorithm, equivalence class algorithm, core algorithm, attribute reduction algorithm, rules extract algorithm etc.

本文首先对数据挖掘和知识发现作一概述，并论述了粗糙集理论的重要概念及其度量，基于这些概念和度量，具体分析了粗糙集理论的近似集算法、核算法、属性约简算法、规则提取算法，给出了它们的算法分析以及具体实现步骤。

Rough set theory and factor space are all applied worldly. The partition determined by equivalence relation is the same as knowledge in rough set theory, that is, knowledge is regarded as a partition of data.

粗糙集理论和因素空间在各个方面有着广泛的应用，由于粗糙集理论将等价关系对空间的划分与知识等同，即将知识理解为对数据的划分，任何U的子集称为U中的一个概念或范畴。

As opposed to the fairway, the rough is a patch of land that is made up of rough or long grass.

相对于航道粗糙的，是一小片土地，是由粗或长草。

Results from experiment indicate that decision rule optimization algorithm can realize the rough matching of user demand and service attribute, therefore avoiding the low efficiency of traditional exact matching in exactness and maturity, so this model broadens the application field of rough sets.

结果表明，通过决策规则优化能够实现用户需求和网络服务之间的模糊匹配，从而克服了传统精确匹配的查全率低、查准率差的缺点，扩展了粗糙集的应用领域。

On the basis of image segmentation by complexion and gray information,some rough facial feature contours can be outlined by seed-filling the non-complexional regions.Then a modified color Snake model was used to fine-draw the rough contours.

根据肤色和灰度信息，在图像分割的基础上，利用种子填充技术获得面部各非肤色特征的轮廓初值；然后采用一种改进的彩色Snake模型对轮廓初值进行精确定位；接着，根据人脸的先验知识，利用含有方向信息的形态学边缘检测算子通过一次逐点考察完成下颚轮廓线的提取。

It inculcates justification before God on the ground of human merits.

它说明在上帝灌输在地上人类优点。

TH Leaguer has excellent Quality Control and Management System.

本公司具有完善的品管部门。