查询词典 mathematical models

Based on this result, and combined with mathematical models for describing the quenching process, the temperature, microstructure and stress field in quenching process were simulated by the FDM, the variation of microstructure and stress in quenching process was analyzed, and effect of the carburization on them was also analyzed.

基于渗碳模拟结果，根据描述淬火过程的数学模型，利用有限元法对试样淬火过程的温度场、组织场及应力场进行了数值模拟，分析了淬火过程中组织和内应力变化，及渗碳过程对淬火过程组织及应力变化的影响。

The mathematical models in the condition of parameter variations are not only used to analyze the effects of parameters on system performance, but also play the important role in improving the celerity and veracity of identification algorithms.

在实时控制中，参数在线辨识算法的复杂程度直接影响系统控制的实时性和动态性能，而参数变化情况下系统的数学模型，不仅能够用于分析参数变化对系统性能的影响，而且对提高辨识算法的快速性和准确性有重要的作用。

In view of the cooling water temperature difference in central air conditioning systems typically setting at 5℃,from the visual angle of economic and technology,establishes mathematical models to analyse the effect of the cooling water temperature and temperature difference on primary and operating costs of the cooling water systems.

针对目前集中空调系统冷却水温差大多采用5℃的情况，从经济技术的角度出发，以集中空调冷却水系统为研究对象，建立了冷却水温度与温差对冷却水系统各部分成本的影响的数学模型。

The details as follow: 1.Based on rules about form error in GB, mathematical models of form error are established including straightness error on the base of minimizing zone method、least-squares method and two dots linked method ; flatness error based on minimizing zone method、lease-squares method、diagonal line and three dots method; circularity and cylindricity error based on minimizing zone method、lease-squares method、minimum circumscribed circle and maximum inscribed circle.

具体内容如下：根据国标中形状误差的相关规定建立了各种要素评定方法的数学模型包括：直线度的最小区域法、最小二乘法、两端点连线法；平面度的最小二乘法、最小区域法、对角线法、三远点法；圆度和圆柱度的最小区域法、最小二乘法、最小外接圆法、最大内切圆法。

In order to carry out the CAD for double-layer fabric conveniently,the paper proposes mathematical models for designing double cloth in which the face layer and back layer are separated and for binding double cloth with integral matrixes ,which are the basis of fabrics weaves and are structured with the principle of matrix theory.

为便于进行双层组织辅助设计，以织物组织结构为依据，以矩阵理论为基础，提出用整数矩阵设计表里分离的双层织物组织及接结双层织物组织的数学模型，把一个三维结构的双层织物组织简化成一个等效的二维矩阵，为利用计算机进行双层组织的辅助设计奠定了基础。

This paper introduces the research results of techniques of testing PC pump oil well through one-year efforts. Which covers the mathematical models of a number of force characteristics strength analysis, and resonance critical problems of rotation rod-string in PC pump wells: resulting of testing method of polish-rod load and rotation rate on the basis of feasible demonstration and technical requirement analysis; study and manufacture of system of testing PC pump well, which involves sensor, collector ring, acquisition circuit and computer; research and determination of assistant technology of testing force on rotation polish-rod and formulation of testing force on polish-rod. A spot testing has been carried out by means of the above research fruit and good results have been achieved.The success testing results in has laid a strong foundation for the oil well diagnosis.

本论文介绍了对螺杆泵采油井的研究成果，其内容包括，对螺杆泵采油井中的旋转杆柱的若干受力特征、强度分析方法及共振临界问题进行数学建模；在可行性论证和技术需求分析的基础上，研究产生了对油井进行光杆负载和旋转速度测试的办法；研究制作了螺杆泵采油井测试系统，它包括传感器、集流环、采集电路和计算机等；研究确定了对实施旋转光杆测力的辅助工艺；制定了对光杆受力进行测试作法，利用以上研究成果实施了现场测试，并取得了理想的结果。

The objective of the program is to provide students with the capability to apply mathematical models and methods to study various problems that arise in industry and business, with an emphasis on developing computable solutions that can be implemented.

该计划的目的是让学生有能力运用数学模型和方法，研究各种问题，出现的行业和业务，对发展中国家是可以实现可计算的解决方案的重视。

It can describe the interaction between the arc and the gas flow adequately and may avoid the disadvantage of former mathematical models which used cold flow field as initiative computative condition.

它能充分反映气流场和电弧的相互作用，克服了以往的电弧数学模型以冷气流作为初始计算条件的不足。

The mathematical models for SCR flue-gas denitration reaction process can provide a basis for the design,operation and control of catalytic reactors.

SCR烟气脱硝反应过程数学模型是催化反应器设计、运行控制的基础。

For the dynamic system of discrete coupled and nonlinear three phase voltage source PWM rectifier, the cycle switch average operator is introduced to transform the discrete system into continuous and the small signal perturbation method is used to transform the nonlinear system into linear, the small signal dynamic mathematical models are set up.

中文摘要：针对三相电压型PWM整流器这个离散的、耦合的、非线性的动态系统，引入开关周期平均算子将离散的系统变换为连续的系统，应用小信号扰动法将非线性的系统化解为线性的系统，进而分析系统的小信号动态数学模型。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。