查询词典 pi

In this paper, a simulation study is made for both the vector-convertion model of a squirrel-cage induction motor and vector control system which takes the model as its control object. In the simulation model, many controllers are used and deeply studied, they are classical PID controller, simple fuzzy control, fuzzy controller with integration factor and fuzzy + PI dual mode controller. In the end of this thesis, fuzzy-neural controller application is stressed.

首先建立了交流电动机矢量控制的SIMULINK模型，通过大量的仿真实验分别对PID控制器、简单模糊控制器、带有积分因子的模糊控制器、以及模糊控制与PI控制结合的复合型控制器应用于矢量控制系统做了深入细致的研究和分析。

PI model is a static hysteresis model, which is rate-independence and is easily used for control system.

PI 模型是一种运算量小，容易求逆并可用于实时控制系统中的迟滞模型。

The test results show that it has better performance both in dynamic and steady state than traditional PI control.

此方法计算量小，实验证明获得了较传统PI控制更好的动静态性能。

At the web-based control page, it is able to upload our 2-D PAGE data and download the Tag Image File Format image. The 2-D PAGE data can be searched easily by limitation such as Peptide, NCBI Accession number, Map, Organisms, pI/Mw range, Drug/Compound, and Operator.

在这个网路管理介面内，我们可上传二维聚丙烯醯胺胶体的电泳资料、下载标志图形档案格式的影像图片，并且我们可以很容易的藉由如：蛋白质的名称、NCBI的登录号码、图像、胶片所使用的物种、蛋白质的等电点值与分子量范围（pI/Mw range）、胶片使用的抗生素或化合物（Drug/Compound）以及实验操作者等条件来搜寻二维聚丙烯醯胺胶体电泳资讯。

We have finished calculating the five trillionth bit of Pi.

我们已经完成了对Pi的第5兆比特位的计算。

Meanwhile, we are starting to run out of ranges for calculating the forty trillionth bit of Pi (even after re-assigning ranges from dropouts).

同时，我们快算完Pi的第40兆比特了（即使已将放弃运算者的部分重新分配）。

April 19, 1998- PiHex launches its second project-to calculate the forty trillionth bit of pi.

1998年四月19日- PiHex 开始它的第二计画-计算 pi 的40兆位。

This paper presents a design method of fuzzy PI parameter adaptive con troller in order to settle better the nonlinear problem of parameters ' changing in direct torque control .

为了更好地解决直接转矩控制系统中的变参数非线性问题，提出了一种适用于异步电动机直接转矩控制的模糊参数PI自适应速度调节器的设计方法

It is proved that these two types of fuzzy controllers are equivalent to the variable structural combinations of nonlinear PI controller and nonlinear control offset. Moreover, the outputs of these fuzzy controllers are monotonically increasing, continuous, and bounded with regard to the corresponding universe of discourse.

基于此，深入研究了模糊控制器的解析结构，并证明了这两类模糊控制器等价于一种变结构的非线性 PI 控制器与相应的非线性控制偏置之和，并且在其输入论域上是单调递增、连续且有界的。

Thirdly, the thesis has conducted the simulation research of the three-phase voltage-type PWM rectifier system, has established the simulation models of the main circuit, the space voltage vector PWM control module and PI regulator, and has carried on the simulation for the three-phase voltage PWM rectifier system.

其次，介绍三相电压型PWM整流器的控制方法，深入研究三相电压型PWM整流器的空间电压矢量脉宽调制控制方法，进行三相电压型PWM整流器的PI控制调节器的设计。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐