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This process described the frequency changer - sensor - electric motor test system mathematical model, and in the platform which the microcomputer, the high speed sampling card, hypothesized instrument software constitutes, has realized to the frequency changer power supply electric motor test.

此次过程描述了变频器-传感器-电动机测试系统的数学模型，并在微机、高速采样卡、虚拟仪器软件构成的平台上，实现了对变频器供电的电动机的测试。

The summer flood season was subdivided into main flood season and post - freshet season by many methods such as the mathematical statistics method and fuzzy analysis method .

本文根据洪水出现时间，将水库的汛期分为春汛和夏汛，并采用成因分析、数理统计、模糊分析等方法又夏汛细分为主汛期和后汛期。

Based on Fresnel Kirchhoff diffraction integral equation, a mathematical model on the diffraction of nonlinear optical media to Gaussian beam is established.

从菲涅耳基尔霍夫衍射积分公式出发，建立了非线性光学介质对高斯光束的衍射模型，通过数值积分，得到了与实验现象符合的计算结果。

The pneumatic friction clutch and brake of the mechanical press based on the former analysis is also investigated. The main research work is shown as follows:(1) The nonlinear mathematical model of the system is established, and the valve characteristics and the friction force of the system are tested.

本文主要进行了以下几个方面的研究： 1气动伺服系统是一个具有较强非线性的系统，本文建立了该系统的非线性数学模型，并对气缸的摩擦力及阀的特性进行了实验研究。

Its mathematical model and various non-ideal terms which can degrade the control accuracy, especially wheel friction, are discussed.

分析和建立了飞轮系统模型及各种干扰因素模型，以及它们对控制精度的影响。

A student of Frisch's, Trygve Haavelmo published The Probability Approach in Econometrics in 1944, where he asserted that precise statistical analysis could be used as a tool to validate mathematical theories about economic actors with data from complex sources.

的学生弗里希的，赖伊哈韦尔莫出版的概率方法在计量经济学在1944年，在那里他断言确切的统计分析，可作为一种工具来验证数学理论对经济行为的复杂的数据来源。

The article makes a comparison among different types of bus, bus transmission signal and several familiar topologies of front-end converters and load-end converters. Finally, the half bridge converter with full-wave rectifier based on the high-frequency parallel-type AC bus bar is chosen as circuit structure and optimized. The working mode under different condition of the circuit is analyzed and a mathematical model is set up under continuous current mode. Simulation result is used as comparison.

通过对比不同类型的母线、母线传输信号以及各种常见的前端变换器拓扑和负载变换器拓扑，确定了基于并联型高频交流母线的半桥变换器加全波整流作为电路拓扑，并优化了电路的结构，分析了基于不同工作状态下的电路结构并建立电流连续模式的数学模型，并与软件仿真结果进行对比。

"Transfer function",A transfer function is a mathematical representation of the relation between the input and output of a system.

"，"转移函数是系统输入与输出之间关系的数学表示。

This paper gives a mathematical definition to that two open planar curves have the same shape based on curvature representation, therefore, a new kind of shape distance is proposed. It is concluded that the problem of computing the shape distance between two open planar curves can be changed to the problem of a functional extremum, and the differential equation is given, which can be used to figure out the shape distance.

本文为基于曲率表示的两条平面开曲线的等形下了严格的数学定义，从而找到了一种新的形状距离度量，并且证明了这种形状距离的计算问题可以转化为一个泛函的极值问题，同时给出了求解形状距离的微分方程。

In this paper the basic structure and working principle of VFT are presented and a mathematical model of VFT is built, and the functional relation between the transmission power and driving torque of VFT are derived. On this basis, the control strategy and the thinking of its simulation are proposed.

文章简要介绍了VFT的基本结构和工作原理，建立了VFT的数学模型，推导了VFT传输功率与驱动转矩之间的函数关系，在此基础上提出了VFT的控制策略和数字仿真思路。

I can still vividly recall the impressive scenes you gave. You were among my friends and relatives who accompanied me from my house to the seaport and when the porters were slow to show up, you obligingly carried my suitcase for me.

你对我的种种感人情意，使我记忆犹新，那天你随着我的亲友从家里送我上轮船，搬运工迟迟不来，你毅然替我提着皮箱上船。

St. Nicholas became the patron saint of Russia, where he was famous for his red cape, flowing white beard, and bishop's mitre.

圣尼古拉成了俄罗斯人的守护神，在那里，他以身披红斗篷，留着飘逸的白胡须，戴着主教法冠而闻名。