查询词典 variable-density system

In the third, the design method of the state observator and the variable structure controller is proposed for the general nonlinear neutral control system with time-delays.

再次，提出了一般非线性滞后中立型控制系统的状态观测器与变结构控制器的设计方法。

Fuzzy control is applied to variable-frequency regulating speed of AC induction motor in this thesis, where one kind of fuzzy controller of speed is designed with Mamdani model. Then the slip frequency control system made up of fuzzy controller is simulated, the simulation results show that its performance is better than that of general PI controller.

论文将模糊控制技术应用于感应电机的变频调速，采用Mamdani模糊逻辑模型，设计了一种转速模糊控制器，并对基于模糊控制的感应电机转差频率控制系统进行了数字仿真，结果表明模糊控制的控制性能优于常规的PI调节器。

Power system ; Variable structure ; Circuit breaker ; Short-circuit current

电力系统；变结构；断路器；短路电流

In this paper the cutter radius compensation is set up by the function of using the macro program to evaluate the system variable ,it discusses daisy chain incise method for slot and gibbous platform NC process which the section is Monotone curve.

本文通过应用宏程序给系统变量赋值功能设置刀具半径补偿值，探讨用环切的方法来进行断面为单调曲线的型腔或凸台等复杂轮廓的数控加工方法，并进行了实例分析。

Using the models, the author has also calculated the vibration response to high speed railway vehicles of three types travelling over simply-supported beam bridges with various span lengths respectively. Based on the analysis of the computation results, the concept of resonance velocity of a bridge under a high speed running vehicle is present, and it is pointed out that comparatively great vibration of bridges on high speed railways is caused by bridge resonance resulted from the static force pulsating. In a vehiclebridge coupling vibration system, the damping constant of the axle spring is the main factor affecting the response variable of bridge velocity resonance, and the influence of track irregularity on bridge vibration on high speed railways is rather smaller.

利用所建立的计算模型，计算了三种形式的高速铁路车辆通过各种跨度简支梁桥结构时的振动响应，对所得到的计算结果进行了详细的分析，提出了高速行车下桥梁共振速度的概念并指出高速铁路桥梁产生较大振动的原因是静力脉动引起桥梁共振造成的；通过研究车—桥耦合振动系统方程的参数后指出，在车—桥耦合振动系统中，车辆—系阻尼的大小是影响桥梁速度共振时响应大小的主要因素，轨道不平顺对高速铁路桥梁振动的影响较小。

The Direct-Driven variable speed constant frequency wind generation system takes low speed PM generator as the generator,and it has the advantage of no gearbox,low mechanical loss,high efficiency,low maintenance cost.

直驱型变速恒频风力发电系统采用低速永磁同步发电机结构，无需齿轮箱，机械损耗小，运行效率高，维护成本低。

Therefore, the study on effective control method for variable displacement pump regulating—system becomes the one of the major research direction in the field of hydraulic control.

随着电子技术、传感器技术和计算机技术的发展，电液控制变量泵在工程中开始得到应用。

Test shows that the system presents satis-factory results in controlling the variable displacement pump of doz-er.

试验结果显示，它对推土机变量泵控制具有较好的效果。

The rebounding damping technology, that the function in the same kinds of products sold in the market are not in common, means when you pull the drawer out to the bottom, it will has a process of soft closing and rebound, which can reduce the noise made by the things loaded in the drawer in efficiency. Moreover, because of the variable damping technology, which help to lessen the force of of the inertia made by the motion of the box when open or close it, and it will extend the useful life of the cabinet effectively. Therefore, it proved that the two-way slow motion cabinet have a longer useful life than the single soft-closing drawer system. And that is the reason why GRASS HOPPER is so popular in many countries all over the world.

反弹阻尼技术就是当你的橱柜抽屉拉到尽头时，有一个轻微的缓冲反弹过程，这样就减小了抽屉里面的装载物的碰撞声音，能达到更加实际意义上的静音，同时由于具备这种功能，在开合抽屉时就大大减小了由于抽屉的运动惯性对柜体产生的破坏力，这样就有效的延长了橱柜的使用寿命；所以使用双缓冲抽屉的橱柜比使用单缓冲抽屉的橱柜寿命明显延长，而市场上还没有具备这种功能的同类产品。

The rebounding damping technology, that the function in the same kinds of products sold in the market are not in common, means when you pull the drawer out to the bottom, it will has a process of soft closing and rebound, which can reduce the noise made by the things loaded in the drawer in efficiency. Moreover, because of the variable damping technology, which help to lessen the force of of the inertia made by the motion of the box when open or close it, and it will extend the useful life of the cabinet effectively. Therefore, it proved that the two-way slow motion cabinet have a longer useful life than the single soft-closing drawer system. And that is the reason why GRASSHOPPER is so popular in many countries all over the world.

反弹阻尼技术就是当你的橱柜抽屉拉到尽头时，有一个轻微的缓冲反弹过程，这样就减小了抽屉里面的装载物的碰撞声音，能达到更加实际意义上的静音，同时由于具备这种功能，在开合抽屉时就大大减小了由于抽屉的运动惯性对柜体产生的破坏力，这样就有效的延长了橱柜的使用寿命；所以使用双缓冲抽屉的橱柜比使用单缓冲抽屉的橱柜寿命明显延长，而市场上还没有具备这种功能的同类产品。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。