数学基础

L Based on the analysis on the current NC programming systems, an interactive NC programming system is studied: First, due to the over sophisticated calculation of cross and tangent points in NC programming, a knowledge based math processor is proposed, then, to provide more convenint graph entry method, a dynamic figure based graph entry system is devised, at last, based on the above mentioned studies, an integrated (including preprocessor, post processor and program testor), interactive, bi-dimensional NC programming system is developed.

围绕语音数控自动编程系统研究：(1)首先，在分析现有编程系统基础上，研究了交互式数控自动编程系统：针对自动编程系统交切计算复杂的特点，提出并实现了基于知识的数学处理子系统；为了方便图形输入，构造了动态表格图形输入子系统。

Thermotical character is about section parameters and character curves; Mechanical character is about rotor's vibration and axial force.

本论文在熟悉和掌握离心式压缩机结构和原理的基础上建立了反映压缩机热力特性和机械特性的数学模型，取代了以往常用的回归模型和逻辑模型，较全面地描述了离心式压缩机的运行规律。

Based on forecast of population of Ulanchap city,the urbanization level of townish and non-agricultural population were forecasted by using mathematical models such as labor structural model and labor transferred model.

本文以乌兰察布市为例，对地区总人口进行预测的基础之上，运用劳动力结构模型、劳动力地域转移模型等多种数学模型，预测了城镇人口城市化水平和非农业人口的城市化水平。

The field survey, sampling, testing and collection of the geological and hydrogeological data were done for the description of evolutional geological structure and sedimentation and division and definition of water-bearing system and hydrogeological age and hydro-pressure system and study of the vadose field and chemical field. By establishing the rammer numerical model, the sandy mudstone thickness recovery model, water-rock interaction particle translative simulation and hydrogeochemical simulation, and using geological statistics, analogism and complex analysis method, water circulation and water exchange of each layer in each study stage have been researched, The results show the regularity of the vadose field evolution in different stages.

本项以野外调查、采样测试和搜集的地质、水文地质大量第一性资料为依据，在论述盆地的地质构造演化、沉积演化的基础上，以含水系统、水文地质期和水压系统类型的划分和定位为研究的切入点，渗流场、化学场为研究主线，通过建立压实数学模型、砂泥岩恢复厚度数学模型、水岩作用物质成分转移的实验模拟、水文地球化学模拟、地质统计法、类比法、综合分析法等方法，模拟计算了各研究层在各研究时期水循环特点和水交替强度，揭示了各研究层渗流场在地史进程中形成演化的规律性。

Based on this, in the usual classroom instruction, improves the teaching method, provides the innovation to the student the environment, the multi-encourage student questioned, provides the opportunity which for the student may innovate, simultaneously strengthens the student thought training and the improvement appraisal way, lets the student by this be glad in mathematics learning process to explore happily, does everything possible to solve, and achieves as far as possible has the innovation, only then insisted like this, the innovative ideology will certainly to strike root in the hearts of the people, the innovative spirit even more carries forward, student's intelligent wisdom can transnormal effectively displays.

在此基础上，在平时的课堂教学中，多改进教学方法，给学生提供创新的环境，多鼓励学生质疑，为学生提供可创新的机会，同时加强学生思维训练和改进评价方式，以此让学生在数学学习过程中都乐意愉快地去探索，想方设法去解决，并且尽量做到有所创新，只有这样坚持下去，创新意识必将深入人心，创新精神更加发扬光大，学生的聪明智慧才能更有效地超常规发挥出来。

Permanent Magnet Synchronous Motor driven by triphase sinusoidal current is studied object in this paper. The movement equtions in several coordinates are set up based on the analysis of electromagnetism restricted relation.

本文以三相正弦波驱动的永磁同步电机为研究对象，在深入分析其内在电磁约束关系的基础上，给出了不同坐标系下的运动方程，根据其数学模型，确定了电动车用电机在旋转坐标系下的矢量控制方案。

Permanent magnet synchronous motor driven by triphase sinusoidal current is research object in this paper. On the basis of analysis of the structure, movement principle and math model of PMSM, Fundamental theories and structure of the system of PMSM alternating current servo systems based on DTC are discussed. Then Simulation models of traditional PMSM DTC and PMSM DTC based on vectors subdivision are established separately.

本文以三相正弦波驱动的永磁同步电机为研究对象，在分析永磁同步电机结构及数学模型的基础上，系统阐述了基于直接转矩控制的永磁同步电机交流伺服系统的基本原理和系统构成，并在MATLAB仿真环境下分别建立了传统直接转矩控制和基于矢量细分算法的直接转矩控制系统的仿真模型。

Whats more, the unascertained measure model of comprehensive safety evaluation in coal mine is established and safety elements are degraded.

建立了矿井安全综合评价的未确知测度数学模型，划分了安全因素的安全等级，并在专家可信度的基础上研究了不确定性结论合成的MAMB方法。

After verification of the program, the mathematical models of the suspension bridges were studied by means of the program, as well as the determination of the main cable's shapes and its internal forces at different stages, the calculation of the cable's unstrained length and the analysis of the construction processes, of which some new approaches were presented in the mean time. Thus makes the structural analysis results of suspension bridges more reliable and in accordance with reality.

在用算例验证了程序分析结果正确性的基础上，应用该程序对悬索桥的数学模型、各阶段缆索几何形状及内力状态的确定以及缆索无应力长度的计算和施工过程分析进行了研究，提出了确定缆索在成桥状态下的几何形状及其内力状态以及缆索无应力长度计算的新方法，使悬索桥的结构分析结果更加符合实际情况。

It is considered that when temperature begins to fall down under Ms, martensite and the untransformed mother-phase are in a kind of thermobalance. We try to use the equations in marten- site transform to get the mathematical relationship between the dynamics of the microclamp and the temperature, also including some useful results for design and fabrication of the microclamp. We hope these results will form the work principle base for SMA microclamp.

认为在Ms点以下，马氏体与未转变的母相奥氏体处於某种平衡状态，利用变温马氏体相变公式，处理SMA微夹钳的热力学和动力学之间的定量或定性的数学关系，得出一些对於设计和制造有用的结论，从而为深入研究SMA微夹钳的热弹性马氏体相变的工作原理打下理论基础。

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。