查询词典 mathematical models

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 andthe 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。

Based on the discrete distribution characteristics of coil turns, the position error mathematical models of PCB air-core coils are set up and then analyzed.

该文基于线匝的离散分布特性建立了PCB空心线圈位置误差的数学模型，并进行了详细分析。

Results To construct several combining multiple regression mathematical models that use the arrested extent of epiphysis of sternal end of clavical and six joints to assess the chronological age of living subjects in Chinese Han female teenagers, and establish some Fisher's discriminatory analysis equations which are used to determine whether the chronological age of Chinese Han female teenagers has been to 14, 16 and 18 years old or not.

结果 建立了我国汉族女性青少年利用锁骨胸骨端及6大关节骨骺闭合程度联合推断活体年龄的多元回归数学模型，推导出判定我国汉族女性青少年是否已满14、16和18周岁的Fisher's两类判别分析方程。

The interference of ambient temperature and external electromagnetism with Rogowskicoil were investigated by mathematical models. The relations between relative measurementerror resulting from temperature and heat distensibility coefficient of coil's framework andwindingcoilwerecarriedout. Theinfluenceofelectromagnetisminterferenceontheaccuracyof Rogowski coil, as well as the effect of temperature on integraph, were studied.

利用建立的Rogowski线圈的数学模型对温度和外界干扰磁场的影响进行了分析，得出了温度造成的相对误差与线圈骨架和绕组线圈热膨胀系数之间的关系；从两个方向上分析了干扰磁场对线圈精度的影响；分析了温度对积分器的影响等。

These issues are mostly difficult to solve according to the general study of mathematical models, but the Monte-carlo method is very convenient for calculating Multiple Integral of low dimension in regular domain of integration or complex range or even non-connected region.

这类问题绝大多数按数学的研究处理模式出发，都是难以解决的，而蒙特卡罗方法对计算高维空间中维数不很高且积分区域是规则的积分、以及复杂区间甚至不连通的区域上的积分都却是很方便的。

The mathematical models of the charges and the additional electric field in the changed dust layer are developed by the electrostatics.

本文基于静电学理论导出了带电粉尘层内的电量分布和电场分布随粉尘层厚度变化的数学模型。

Two types of the mathematical models of Spatial Variogram are inferred based on the elliptic distribution function.

基于椭圆分布函数可导出两类空间变异函数的数学模型。

According to the requirement of precision diameter measurement of the single crystal silicon sphere, the principle and characteristics of the measuring system were presented, and mathematical models were established for calculating the ellipticity of concentric interference rings with different beam incident angles.

针对标准单晶硅球直径精密测量的需要，本文在介绍标准硅球直径测量系统原理并分析其光路特点的基础上，根据建立的数学模型，对激光束斜入射标准板时产生的椭圆干涉图像进行了分析，并对不同入射角度时干涉环中心点带来的直径测量误差进行了研究。

In complementarity theory, which is a relatively new domain of applied mathematics, several kinds of mathematical models and problems related to the study of equilibrium are considered from the point of view of physics as well as economics.

在互补性理论，这是一个相对较新的应用数学领域，数学模型和有关问题的平衡研究几种被认为从物理学的角度和经济的。

Also the problems of stochastic controllability, observability and stability of the filter are studied, a simple observability criterion for the time-invariant systems is set up, error band of the filtering is given theoretically, and the filtering stability results are proved under more general conditions; besides, the filtering error caused by uncorrect mathematical models is analysed.

本文还研究了随机能控能观性及滤波的稳定性问题，建立了结构简单的平稳定常系统的能观性判据，在理论上给出了滤波算法的误差范围，在更一般的条件下证明了最优滤波算法的稳定性；并从理论上分析了模型误差对滤波产生的影响。

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。