数学基础

It is well known that rotor parameters of induction motor are subjected to variability and hard to be measured, which will deteriorate performance of control systems based on the mathematical model depending upon rotor parameters, such as rotor flux oriented vector control system, indirect self-regulation.

由于工作原理和材料结构上的原因，异步电机的转子侧参数易变难测，因此所有建立在异步电机动态数学模型基础之上并且利用转子侧参数进行控制的调速系统都或多或少地受到转子参数变化的影响，例如广泛采用的按转子磁链定向的矢量控制系统。

In this paper, in order to improve system performance, fuzzy control technique and Voltage Space Vector Modulation technique were applied to DTC.

本文在分析交流电动机数学模型的基础上，首先介绍了直接转矩控制的原理。

Automatic control system for ventilating which has been used in the study of water tunnel supercavitating experiments has been designed in this paper.

在深入分析流量调节阀非线性工作特性的基础上，建立了充气控制系统各个环节的数学模型。

Basing on the computing model of liquid viscous resistance of the sucker rod string, damping coefficient of power law flow for sucker rod string is created, using the condition of equivalent merit. Mathematics model and emulate model of the vibration of sucker rod sting are established.

以幂律流抽油杆柱液体粘滞阻力的计算模型为基础，并应用等功条件提出了幂律流条件下抽油杆柱阻尼系数的计算方法，并依此建立了聚驱抽油杆柱轴向振动的数学模型和仿真模型。

On the basis of implementing statistical analysis to the parameters data of each logging response feature,the paper determined the probability density function and subordinate functions and gave math model used for lithologic identification by vulcanite fuzzy probability.

在对各测井响应特征参数数据进行统计分析的基础上，确定了模糊概率的概率密度函数和隶属函数，并给出了用于火山岩模糊概率识别岩性的数学模型。

Improvement of boundary treatment in mathematical model of flood diversion area ;2. Based on this,a plane 2-D water mathematical model for the flood diversion area is set up.

在此基础上，建立了平面二维水流数学模型，并将该模型运用到湖北龙骨湖、沉底湖分蓄洪区实际计算中，取得了令人满意的结果。

In order to study the heating and cooling problems of the motor,heat transfer simulation model for water-cooled explosion-proof motor was established on the basis of analyzing its structure,materials,and heat exchange mechanism.

为了研究该类电机的发热与冷却问题，在对防爆型水冷电机的结构、材料以及换热机理进行分析的基础上，建立了防爆型水冷电机的传热数学物理模型。

So in power supply system of watercraft, the high voltage PWM inverters will be wildly used.

本文以实际项目为依托，主要做了以下工作：数学模型的建立是分析一切控制系统的基础。

This paper, based on the results obtained by using Delph method for single-standard speciality ordering as well as mathematic method for multip-standard odering, applys FHW method to performe analysis qualitatively and quatitively and works out satisfactory result of this programme.

本文用Delphi法获得单准则的专业排序，用数学方法处理得到多准则的排序结果的基础上，应用FHW方法，使定性和定量有机结合起来，圆满解决人才专业结构规划问题。本文论述了此方法，并结合实例进行了研究。

The school should have well-conditioned campus network connected with Internet, have

学校在小学语文、数学、科学学科和计算机教育方面有着深厚的基础和强大的师资队伍。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。