进行中的

This thesis make a study on Vector-control VVVF system of asynchronous motor. In the course of study,making use of the mathematical model of asynchronous motor in MT axes . Then both open-loop control system and close-loop vector-control system are respectively simulated with simulation block SIMULINK in MATLAB.

本文对异电动机变频调速系统进行了研究、利用异步电动机在二相同步旋转MT坐标系下的数学模型，使用MATLAB中的仿真工具箱SIMULINK分别对开环控制系统和闭环矢量控制变频调速系统进行了仿真。

This thesis make a study on Vector-contorl WVF system of asynchronous motor. In the course of study, making use of the mathematical model of asynchomous motor in MT axes. Then both open-loop control system and close-loop vector-control system are respectively simulated with simulation block SIMULINK in MATLAB.

本文对异步电动机变频调速系统进行了研究，利用异步电动机在二相同步旋转MT坐标系下的数学模型，使用MATLAB中的仿真工具箱SIMULINK分别对开环控制系统和闭环矢量控制变频调速系统进行了仿真。

In order to study the importance of high quality forage in the diet of dairy cow in perinatal period, the content of sodium, potassium, chloride, sulfur and the cation-anion difference of 12 forage samples including alfalfa, tall fescue, orchard grass and smooth brome were analyzed.

为探讨优质饲草在围产期奶牛日粮中的重要性，对紫花苜蓿、苇状羊茅、鸭茅、无芒雀麦等12个饲草样品进行了钠、钾、氯、硫含量的测定并进行了阴阳离子平衡分析。

MoO3 organosol was obtained by using CTAB to modify the nanoparticles in MoO3, hydrosol and n-pentanol to extract MoO3 nanoparticles modified by CTAB. The effect factors on organosol were discussed extensively.

采用表面活性剂CTAB对MoO_3水溶胶中的纳米粒子进行表面修饰，通过正戊醇萃取制备了MoO_3纳米有机溶胶，对制备有机溶胶的条件进行了系统地研究。

The objective in this example is to overdrive the channel and compensate for its losses.

在这个例子中的情况是用对信道进行过度驱动以及对它的损耗进行补偿。

In the end, based on the deep analysis of its application to welding power source, this paper forecasts the future development.

最后，对仿真技术在焊接逆变电源中的应用所存在的问题进行了深入分析，进而对其发展趋势进行了展望。

Free amino acid in ultra-high pressure sterilization milk is measured by auto amino acid analyse apparatus adopting post-column derivation means and is contrast with original milk, pasteurism milk as well as ultra high temperature sterilized milk.

采用氨基酸自动分析仪，通过柱后衍生的方法，对超高压杀菌乳中的游离氨基酸进行测定，并且与原乳、巴氏杀菌乳、超高温瞬时杀菌乳进行比较。

The diameter of fat ball and casein micelles in Ultra high pressure sterilized milk is measured by both Numeral microscope(DMBR-400) and Scan electron microscopy(JSM-6360LV) respectively,and is contrast with original milk,pasteurism milk as well as ultra high temperature sterilized milk.

采用DMBR-400数码显微镜和JSM-6360LV扫描电镜分别对超高压杀菌乳中的脂肪球和酪蛋白胶束的直径进行测定，并且与原乳、巴氏杀菌乳、超高温瞬时杀菌乳进行比较。

Based on the analysis of the Doppler effect of the mobile channel, the performance of two MIMO-OFDM systems (STTC-OFDM and SFBC-OFDM) in the fast-moving environment is studied. Then, the algorithm for channel estimation based on the training sequence is extended into the fast-moving environment by introducing the space-frequency coding, the method of the equal-interval pectinate pilot-inserting, and the complete Maximum-Likelihood space-frequency decoding.

针对快速移动环境中存在的多普勒效应，研究了两种多输入多输出正交频分复用系统在快衰落信道中的误码性能，采用空频编码梳状等间隔导频插入方式，以及完全最大似然空频分组码解码算法，使用导频与接收信号进行信道参数估计，将一般多输入多输出正交频分复用系统中的基于训练序列的最小均方误差信道估计算法推广到了快衰落信道环境中。

When objects need flash perspectivity in industrial production and scientific research, it is a useful and effective way to useγray beam pulses to detect the whole states.

在工业生产和科学研究应用中，当需要对物体进行瞬态透视成像时，利用γ射线束对物体进行探测的闪光透视技术是检测装置整体工作过程的有效手段。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。