逆

The 2~ one is to reduce the area cost by reuse some field operation modules such as GF-MUL and GF-SQR. Fermat"s little theorem proves that inversion can be obtained by add and square operations, we needn"t design one more module for inversion on condition that inversion only needed for one time when Montgomery point multiplication method been used.

我们采用射影坐标系表示有限域上的元素，实现点乘只需一次求逆，因而只需要在现有的底层模块基础上，设计平方和乘法的控制电路来实现求逆，而不必设计专用的求逆运算模块。

Lastly, this paper discussed the invertibility of discrete nonlinear systems and the construction of ANN α-th order time-delay inverse system for the linearization and decoupling of discrete nonlinear system is proposed.

从逆系统理论的完整性出发，本文探讨了离散非线性系统的可逆性，并给出具有线性化和解耦能力的神经网络α阶时延逆系统的结构及其实现。

Eliminating the restriction of the characteristic of field ,the forms of invertible linear operator preserving inverses of matrices over full matrix space with at least four elements are described.

去掉了域的特征限制，刻画了至少包含4个元素的任意域 F上的全矩阵空间Mn的保逆的可逆线性算子形式。利用保幂等的结论证明了f为Mn上保持逆矩阵的可逆线性算子当且仅当存在P∈GLn，使得f=εPAP-1，A∈Mn，ε=±1∈F；或者存在P∈GLn，使得f=εPATP-1，A∈Mn，ε=±1∈F

The power supply can acquire real time online voltage signal of electric network and input into inverting system; generate synchronous signal and effective value of amplitude signal, then become SPWM pulse by wave generating chip SA4828. High degree sinus and good anti-disturbance performed power supply inverting can be also realized.

该电源可以在线实时采集电网电压送入逆变系统，实时产生同步信号和幅值有效值信号，通过波形产生芯片SA4828实时产生和采样电压同频同步且幅值可调的正弦脉宽调制脉冲，并采用开关线性复合功率变换技术，实现高正弦度和强抗负载扰动性能的电源逆变。

In this paper, the application of the multilevel invertor and the development present condition of multilevel invertor circuit and control strategy is introduced firstly.

本文首先介绍了多电平逆变器的应用，以及多电平逆变器电路拓扑结构和控制策略的发展现状。

Has become the essential invertor in each kind of domain, along with on-off element large capacity and high frequency, microcomputer high performance and control technology and return route integration, may realize invertor's miniaturization, the high response, the high efficiency output and high reliable.

在各种领域已成为不可缺少的逆变器，随着开关元件大容量化和高频化、微机高性能化和控制技术和回路集成化，可实现逆变器的小型化、高响应化、大功率输出化和高可靠化。

This paper mainly introduces the electrical characteristics of the Robot MOSFET Arc Welding Invertor and its arc welding technological properties. Emphases are laid on the analyses of the current and voltage wavefonns of the main circuit as well as the energy loss of the MOSFETs. The different static characteristic curves and parameters of electrical reactance are also discussed.

研究了机器人场效应管式弧焊逆变器的电气性能和弧焊工艺性能，并着重对其逆变主电路电流、电压波形、管组功耗进行分析研究，以及探讨如何采用不同形状的外特性曲线与合理设计电子电抗器的电参数，从而提高弧焊机器人对不同工件开关、不同弧焊方法的适应性，实现贫飞溅的焊接。

The generators and irreducible representation coherent stato of the SU(1,1) group are constructed by using the inverse operators of hose harmonic oscillator, and the inhomogeneous inverse differential realization s of the SU(1,1) group are derived

利用玻色振子的逆算符构造了SU（1，1）群的生成元和不可约表示的相干态，导出了SU（1，1）群的非齐次逆微分实现。

The infamous L-Forests of Kerning City. These maps are well known for being a pain to navigate.

废弃都市的森林，也就是逆恩森林、废都森林众所周知逆恩森林是一个比较难走的地方

Wengeng thrust fault in Langshan area of western Inner Mongolia developed at the northeastern boundary of Jurassic Wengeng sedimentary basin is a large thrust fault zone.

内蒙古西部狼山温更逆冲断层发育在温更侏罗纪沉积盆地西北边界，是一条规模较大的逆冲断裂构造带。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。