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The mathematic model of the PMSM was established and the factor of friction was considered.

首先建立了PMSM的数学模型，同时考虑了摩擦对于系统的影响。

Through the analysis of the work principle of three phases voltage resource PWM converter, set up the low and high mathematic models, deduce the restriction equations about grid voltage, grid current, modulation voltage and the DC output voltage and the calculation equations of the AC-side inductance and the DC-side capacitance. There are two control strategies are adopted: Predicted current control strategy and voltage-current two closed-loop control strategy, and give a comparison by theory and practice.

通过分析三相电压源型PWM变换器的工作原理，分别分析了低频和高频数学模型，并推导出了交流侧电压电流、调制电压、直流侧电压之间的数学约束关系以及交流侧电感和直流支撑电容参数的选取依据公式；分析对比了两种控制策略：预测电流控制和电压电流双闭环控制并加以实验验证；同时采用了负载电流前馈补偿和本文提出的一种基于专家系统的神经元新型智能PI控制器两种方法大大提高了整个系统的动态响应性能，并在仿真和实验中加以验证，这也是本文研究的重点内容之一。

In order to evaluate measuring uncertainty of tensile testing result of metallic material, the mathematic model of calculating uncertainty is established and different factors of influencing testing result are determined taking rectangle head shorter proportional sample of 18mm Q235B plate as example.

为评定金属材料拉伸试验的结果测量不确定度，以轧制厚度为 18mm的Q2 3 5B板材矩形带头短比例试样为例，建立了不确定度计算的数学模型，确定了影响试验结果的下屈服力FSL、最大力Fm、试样原始厚度a及试样原始宽度b等各项因素，计算出了各种因素的标准不确定度，得出拉伸试验结果的扩展不确定度，并给出最终测量结果的表达式：下屈服强度ReL、抗拉强度Rm的最终测量结果分别为(3 0 5± 5 )MPa和(4 3 5± 10 )MPa。

This research was imbursed by a National Natural Science Fund project titled Integration And Systematization Of Mathematic Models For Soil And Water Resources Study In A Basin And Its Application. This study established a base for the share of geography information and it also possessed an important significance for the lately geography process quantificational study and its models improvement and integration.

该研究在国家自然科学基金项目&流域土壤与水资源模拟模型的集成和系统化及其应用&资助下完成，其成果将为地学信息共享奠定了一定的基础，对今后地理过程定量化研究以及模型的改进、集成有重要意义。

From the theory of dielectric breakdown, the mathematic method was used to describe the whole course during which the dielectric captured the electric charges that was immitted by electrode.

从电介质的击穿机理出发，用数学方法描述了电极注入电荷被介质捕获的全过程，详细分析了电介质的击穿特性并得出了电击穿现象的理论公式，通过同成分铌酸锂晶体和掺锌铌酸锂晶体的极化和击穿实验对理论分析的结果进行了验证，试验现象与理论分析吻合较好。

In this thesis, firstly, based on the complex vector model of doubly-fed induction generator, the mathematic model is deduced under the synchronous coordinate.

本文首先从双馈电机的复矢量模型出发，建立了在同步坐标系中双馈电机的数学模型，为双馈电机的磁场定向矢量控制提供理论基础。

In this paper,the general mathematic model and equivalent circuit of dual stator-winding induction machine are proposed.

首先给出了定子双绕组异步电机通用数学模型及等效电路，采用解析法对不同绕组结构的定子双绕组异步电机漏电抗计算进行了系统地分析，导出了相应的计算公式。

Meanwhile, the Beer-Lambert equation was modified for 254nm and 365nm UV light permeation through methyl orange solution, and a mathematic equation for light permeability was established.

通过实验研究，对紫外光在溶液中透过性的Beer-Lambert公式进行了修正，得出了不同波长紫外光在甲基橙溶液中透过性的数学表示式。

The influence of the process parameters on electron beam melting process is investigated and a mathematic model is set up by linear regression analysis.

研究了工艺参数对电子束熔融工艺过程的影响，采用线性回归分析建立了一个数学模型。

The usage technique of radar for high-speed ship s to prevent collision in Three Gorges reservoir;2. Research on Modeling and Simulation of High-speed Ship CPP Propulsion System;3. Based on three typical high-speed ship (high-speed monohull ship,planning hydrofoil craft,wave-piercing Catamaran),a mathematic models of high-speed ship ′s propulsion system(common screw propeller,adjustable-pitch propeller, water-jet propeller) and intelligent control system are established the simulation with the help of Matlab/Simulink is realized.

以三种典型的高速船(高速单体船、翼滑艇和穿浪艇)为例，建立了其推进(普通螺旋桨、可调螺距螺旋桨及喷水推进)系统及智能控制的数学模型，并在Matlab/Simulink上实现仿真；建立了推进系统的优化数学模型，编制了优化算法(混沌算法、遗传算法和粒子群算法)程序，实现了智能推进系统的优化设计；最后，运用Matlab/GUIDE进行界面设计，编制了高速船智能推进系统仿真与优化软件，实现了良好的人机互动。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。