查询词典 model theory

Based on mastering traditional classification model of thematic cartography elements, we apply fuzzying mathematics, statistics, information theory and so forth, to cartographical data processing model, perfect each model of making sure of grading circumscription, and build an algorithm how to automatically fix on the number of grading.

本文在掌握了传统的专题制图要素分级模型的基础上，把模糊数学、统计分析及信息论等近代数学方法运用到了地图数据处理模型中来，提出并完善了各个分级界限的确定模型，并建立了如何自动确定分级数的算法模型。

Based on the extended Phillips-Heffron model for the multi-machine power system and model control theory, a new model control analysis method of free eigensolution is proposed to select the rational position to configurate power system stabilizer in multi-machine power system.

引言 电力系统中的低频振荡是由于缺乏机械模式阻尼而引起的，为了抑制这种振荡，提高电力系统的阻尼及其稳定性，在电力系统中设置电力系统稳定器(Power system Stabi一izer，Pss)是一种经济而有效的方法〔'，2。

M/s. The following dimensionless relationships were obtained: Sh=2+0.073Re〓Sc〓〓〓 The desulphurization process by powder injection and blowing in RH refining of molten steel and its mechanism have been considered and analyzed. Based on the tworesistance mass transfer theory and the mass balance of sulphur in the system, a kinetic model for the process has been developed. The related parameters of the model have been reasonably determined. Modeling and calculations for the process by injecting and blowing the lime based powder flux under the assumed operating modes in a RH degasser of 300t capacity have been carried out using the model.

考虑颗粒与液流的相对速度，RH—PTB条件下熔池传质特性可由下式表征： Sh=2+0.073Re〓Sc〓考虑紊流中脉动速度引起的能量耗散，RH—PTB条件下熔池传质过程服从如下关系：〓将粉剂颗粒与钢液间的传质当作刚性的气泡与钢液间的传质处理，对RH—PTB过程有：〓考察和分析了RH喷粉脱硫过程及机理，基于双重阻力传质理论和体系内硫的质量衡算，建立了RH喷粉脱硫过程的动力学模型，确定了模型各有关参数，包括各传质系数和脱硫处理过程中钢液内参与脱硫反应的粉剂量等。

During the numeric model processes, the finite element method is used to build the discrete model and analytical theory of the rotor-bearing system. The entire system is divided into several dividable substructures, each of which develops individual systematic mathematic model. Finally, the motion equation of whole structures is combined by the integrity of the dynamic variables and force balances on connections of each substructure.

在数值建模过程中，以有限元素法为基础，建立转子-轴承系统之离散模型与分析理论，将整个系统结构划分成若干个可分离部位的子结构系统，并发展子结构的个别系统数学模型，最后整体结构的运动方程式再以各子结构结合面上节点的动态参数一致性及力系平衡进行结合。

The use of CAE on the analysis of motor rotor-bearing system, During the numeric model processes, the finite element method is used to build the discrete model and analytical theory of the rotor-bearing system. The entire system is divided into several dividable substructures, each of which develops individual systematic mathematic model. Finally, the motion equation of whole structures is combined by the integrity of the dynamic variables and force balances on connections of each substructure.

本文探讨马达转子-轴承-框架系统之结构动态特性，提供动态特性之关系设计过程中，其转子-轴承系统的动态设计考量方法，利用电脑辅助工程技术，以有限元素方法，先将马达转子-轴承-框架系统分离各个部位成为子结构，将子结构个别的数学模型加以离散化，最后以各子结构结合面上节点的动态参数一致性及力系平衡，连结离散化子结构成为整体结构的运动方程式。

There are three important theoretical models about the currency structure of reserves , namely property theory model, Heyler-Knight model and Dooley model.

本文认为需要综合考虑三大模型才能说明一国外汇储备的货币结构选择情况，因此，论文综合考虑这三大模型对中国外汇储备货币结构进行实证分析。

Firstly, the thesis analyzes the content of behavior consistency of C~4ISR system requirement, researches the theory of behavior consistency validation based on executable model. Secondly, it analyzes the extense form of basic state chart, researches the grammar rules and formal description method of the transition-oriented state chart. Lastly, it brings forward the method for transforming TO_StateChart to Object Petri Net model, and based on executable model, researches the method of validation for behavior consistency between the state chart and sequence diagram.

论文首先对C~4ISR系统需求行为一致性验证的内容进行了分析，研究了基于可执行模型进行行为一致性验证的原理；其次分析了基本状态图的扩展形式，研究了面向转移的状态图(简称为TO_StateChart)的语法规则及其形式化描述方法；最后研究了TO_StateChart转换为对象Petri网模型的方法，并以此为基础，深入研究了基于可执行模型进行状态图和时序图之间行为一致性验证的方法。

The basis is initiative assume build model of mixture integer program, apply Lagrange flabby theory, decompose with the model flabbily through the tie, design a heuristic algorithm to undertake the model seeks solution.

根据初始假定建立混合整数规划模型，运用拉格朗日松弛理论，通过约束松弛和模型分解，设计一个启发式算法进行模型求解。

First the theory of grey system and of principle grey prediction model is presented.Based on the data of sown areas of farm crops in Hubei Province for 9 years,the GM(1,1) grey prediction model is established and the precision of prediction is higher by checking the result,so the model may be applied to the prediction of sown areas of farm crops in Hubei Province for futural severe years.

中文摘要：首先介绍了灰色系统理论及灰色预测建模原理，以湖北省连续9年的农作物播种面积数据为基础，建立GM(1，1)灰色预测模型，对湖北省未来8年的农作物播种面积进行了预测，并对预测结果进行检验，预测结果精度较高，可以用来对湖北省未来几年的农作物播种面积进行预测。

In this paper,firstly,the writer imaginarily designs a real single-curvature arch dam. According to similarity theory,model is then made and test in the experimental laboratory.Undamage model is not only simulated,but also crack damage model,which is loaded from jacking apparatus,is mocked,and dynamic characteristics, including primiarily frequency and modal, is tested in all kind of statuses completely.

本文首先设计一座假想的单曲拱坝，然后根据相似理论，在实验室制作模型进行试验，试验不仅模拟了完好状况下的拱坝，而且还通过加载方式较真实的模拟了不同损伤裂缝程度下的拱坝，并且完成了各种不同状况下的动力特性测试，主要是频率和模态。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。