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In order to improve these problems,a simple frequency-independent mathematic modeling method by using polar coordinate is developed in this paper,and then the developed model is compared with widely used PI hysterics model.

针对当期望输出与频率无关时的压电陶瓷的迟滞非线性问题，提出了一种基于极坐标的数学建模方法，同时给出了通用的PI迟滞模型，并对两种模型进行了比较。

For applications requiring a wide bagging capability, the AB 180 OneStep integrates the successful Autobag AB 180 Wide Bagger and PI 412c Imprinter platforms to provide an inline, 1:1 'Print-n-Pack' system.

对于需要广泛装袋能力，是AB 180 OneStep整合成功Autobag抗体180宽巴格尔和PI 412c印刷机平台，提供一个嵌入式，1：1'打印丁基包'系统。

In conclusion, the histological features in time-zero biopsies are related with the incurrence of ACR, BC and PI post-LT.

可见供肝术中零时相活检组织学特征与术后ACR、BC和PI的发生相关。

The design method of PID controller based on pole-assignment is proposed in this paper. The simulations indicate that this PID controlled inverter provides nice characteristics. A method of PI controller combined with instantaneous differential voltage is also proposed, which is equivalent to PID control in essence and can be seen as a simplified dual-loop form. Accordingly it is a simple but effective adjustment.

本文研究了基于极点配置的PID控制器的设计方法，仿真结果显示这种PID控制器性能优越，同时还提出一种PI调节器结合电压微分反馈的调节方式，并指出这种调节方式和PID调节其实是等效的，而且是一种简化的双环形式，因此是一种简单而有效的调节方式。

In this thesis, the design scheme of a DSP-controlled inverter applied in mobile generator is presented at the beginning and then the design method of control system is mainly discussed. Equivalent output impedance model of instantaneous voltage and current closed-loop controlled inverter is established on the foundation mentioned above. How the values of LC filter, parameters of PI regulator and feedback coefficient etc. affect the external characteristic of inverter is analyzed in detail. Non-linear factor of inverter are also discussed and corresponding solutions are put forward.

本文首先给出了移动发电机DSP控制逆变模块的设计方案，着重讨论了控制系统的设计方法，在此基础上建立了电压电流瞬时值双闭环控制的逆变模块等效输出阻抗模型，对滤波器LC值、PI调节器参数和反馈系数等各项因素对逆变模块输出外特性的影响进行了详细分析，并探讨了逆变模块中非线性因素对输出波形的影响，提出了相应的解决方案。

The principle of controller PI - BLEND and realization of interlock were described in details.

主要介绍了腈纶生产中原液进料系统的控制方案，详细叙述了控制器PI-BLEND的原理和联锁的实现。

For example, you are probably familiar with the number called "pi". This irrational number is so important that we give it a name and a special symbol!

例如，你可能对圆周率"Pi"这个数很熟悉，这个无理数如此重要，以至于我们给它命名，而且用一个特殊符号表示它。

The software of this system written in C programming language mainly, follow the principles of modular design, including the speed measurement, speed PWM drive, speed PI-conditioning, speed display, keyboard input, and other procedures module. The code has easy maintenance and great probability.

系统软件主要使用C语言编写，遵循模块化设计的原则，编写了转速的测量、转速的PWM驱动、转速的PI调节、转速的显示、键盘输入等程序模块，程序代码具有良好的易维护性和可移植性。

The software of this system written in C programming language mainly, follow the principles of modular design, including the speed measurement, speed PWM drive, speed PI-conditioning, speed display, keyboard input, and other procedures module.

系统软件主要使用C语言编写，遵循模块化的原则，编写了转速的测量、转速的PWM驱动、转速的PI调节、转速的显示、键盘输入等程序模块，程序代码具有良好的易维护性和可移植性。

In the software,it studies 3/2 transform module,magnetic flux linkage and torque estimate module,M/T velocity measurement module,PI module,fuzzy control and start module,PWM module in detailed.

对软件中3/2变换模块、磁链和转矩估算模块、M/T测速模块、PI模块、模糊控制与启动模块、PWM模块进行详细的研究。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。