查询词典 mathematic

These non-linear characters directly lead to the estimate error of SOCo We want to construct a more correct battery model and it's state model through that we can use some kind of mathematic algorithm to find out the value of electrochemical polarization voltage.

因此找到一个好的蓄电池模型，能够通过数学推导找到蓄电池的动态开路电压的合理值，缩小SOC的估测范围，提高蓄电池管理系统对SOC的估测精度。

The thesis illustrates the principle of the and its application in the system, establishes the simulation model of the vector control system of PMSM based on the EKF and successfully realizes the application of the speedless sensor in motor control. Firstly, based on the mathematic model of permanent-magnet synchronous motor, the PMSM vector control system is built. Secondly, the Extended Kalman Filter is designed for the on-line estimation of the speed and rotor position by only using measurements of the motor voltages and currents.

首先，基于PMSM的数学模型，建立了电机的矢量控制仿真模型；其次，设计了扩展卡尔曼滤波器，通过检测电机端电压、相电流对电机转速和转子位置进行在线实时估计，实现了PMSM的无传感器矢量控制；最后，在Matlab7.0环境下进行的系统仿真试验表明，该方法具有优良的转角跟踪特性和较好的转速跟踪特性，同时系统具有较强的抗负载扰动性能和较佳的控制性能。

A set of optimizing mathematic programis given ultimately,with which a scientific decision way for choice of helicopter'spickle points in ASW is curved out.

最终给出一组优化的数学程序。它可为直升机攻潜过程中投雷点的选择提供一条科学决策的途径。

Take employ market for instance, many great companies like Mogen Stanly, Shell recruit their new staff by holding an examination with mathematic consequence, case reasoning and some other ways of checking a person's intellect.

例子：就业市场上很多自主招聘的试题数学推理、案例研究等思维能力测试都占了很大的比重；在中国，一些中学过度重视竞赛教育，这些学生绝大多数在中学后就不愿意再从事基础学科研究

In Chapter 2 the foundamental principle of GAs is introduced and the mathematic background of GAs is discussed. Then, a genetic algorithm based on non-Abel group theory and a parallel genetic algorithm based on supercube computer system are proposed.

遗传算法广泛地应用于函数优化和组合函数优化问题，然而如何改善其性能，提高收敛效率，仍然是当今遗传算法研究界的重要课题。

Synthetize discussions of fracture water mathematic models and practical condition are made on the base of system analysis on the theory of fractured flow.

在等效连续介质模型有效性判定方法研究上，提出裂隙岩体在满足下列条件时，采用等效连续介质模型理论研究裂隙水渗流规律是有效的：(1)存在代表性单元体。

In the first part, it describe the two-level system with the quantum mechanics which include the dress state picture, the adiabatic description of the interaction and the mathematic method; In the second part, it tell us that using the shaping-pulse how to manipulate the quantum coherent control, chip field and tanh field are invested.

第一部分二能级系统的量子描述在这一部分中详细推导了缀饰态表象中量子态的描述，重点介绍了绝热条件下的布洛赫矢量的表达式，以及求解布洛赫矢量的方法。

In order to provide a simple and convenient method of earthwork volume calculation in the work of terracing the land on hillside,a formula for earthwork volume calculation was developed using the methods of literature consultation and geometrical mathematic calculation.

为西南丘陵地区土地开发整理坡改梯坡式梯田土方量计算提供科学简便的计算公式和计算方法，为工程项目审查及预算审查提供坚实的依据。通过运用文献研究和几何数学方法，推导出坡改梯坡式梯田土方量的计算公式。

The VSCF DFIG wind power generation is transient response proceeding, which is influenced by operation characteristics of generator before and after grid connected. A novel S-Function is adopted to describe the mathematic model of DFIG based on state equation. A complete simulation model of VSCF DFIG wind power generation system based on MATLAB/Simulink and SimPowerSystems is established, which can be used to not only simulate subsystems of no-load operation and generation operation, as well as can be used to but also accurate control parameters of DFIG in simulation. The simulation model have excellent transportability, and can be used DFIG of different power rated if only design relevant controller.

变速恒频双馈电机风力发电是一个受并网前后发电机运行状况影响的暂态过程，利用MATLAB的S-Function编写DFIG的仿真程序，然后结合Simulink和SimPowerSystems工具箱，开发了基于S-Function的空载运行和发电运行的变速恒频双馈电机风力发电子系统模型，在仿真过程中可对双馈电机进行精确控制，然后对其进行了系统整合，本文开发的模型具有可移植性，只要再设计相应的控制器，就可应用于不同功率等级的双馈电机风力发电系统。

The mathematic description of the void volume fraction evolution is modified and the parameters in the modified model were obtained according to the tensile test results of uncorroded material.

根据未腐蚀材料拉伸试验数据，回归给出改进的孔隙率演化模型中的参数值。

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。