环

The innovation of this thesis is: advanced a new method by adopting "three-ring method" to measure dynamic contact resistance of slip-ring, solved the lower measuring efficiency and inconvenience resulted in leads intertwist during the measurement of dynamic contact resistance of slip-ring.

本论文的创新点为：提出了一种用"三环法"测量导电环动态接触电阻的新测量方法，有效地解决了目前导电环动态接触电阻测量中由于导线缠绕而导致的检测效率低下、操作不便、不便较长时间观察导电环性能稳定性等问题。

In 1999, Nicholson further introduced the concept of strong clean rings as follows: A ring R is said to be strongly clean if every element of R is the sum of an idempotent element and an invertible element that commute with each other.

W.K.Nicholson进一步引入了强clean 环的定义：一个环R 被称为强clean环，如果R中的任意一个元素均可以表示成一个幂等元和一个单位和的形式，并且幂等元和单位可换。

Firstly,the Image Jacobin Matrix for GRB-400 robot which is a dynamic look and move system has been established.Then,a hierarchical Model Reference Adaptive Control law combined with a fuzzy regulator is proposed to solve the control problem,and the comparison of the experimental step responses between system with fuzzy logic and system without fuzzy regulator is delivered.The experimental results show the feasibility and advantage of the control l...

首先建立了视觉伺服GRB-400机器人的图像雅可比矩阵，然后针对该动态Look and Move系统提出了一种带有模糊自调整能力的分层模型参考自适应控制的设计方法，其特点是设计方法简单并可以在线调节相关参数，给出了闭环系统的阶跃响应实验结果，并与原分层模型参考自适应控制闭环系统的动态性能做了比较，实验证明了改进后的闭环系统具有更好的动态性能。

By using Jordan Curve Theorem and classical combination, we obtain the formulas for computing the flexibility of wheels and wheel-like graphs on the torus. 2. By C.Thomassen's work on Large Edge Width embeddings, we obtain some properties of some locally LEW-embedded graphs.

利用Jordan曲线定理和经典的组合计数方法，得到了轮图在环面上柔性的计算公式，结合轮图的结果以及环面的性质，得到了轮型图在环面上柔性的计算公式。

By using Jordan Curve Theorem and classical combination, we obtain the formulas for computing the flexibility of wheels and wheel-like graphs on the torus.2. By C.Thomassens work on Large Edge Width embeddings, we obtain some properties of some locally LEW-embedded graphs.

利用Jordan曲线定理和经典的组合计数方法，得到了轮图在环面上柔性的计算公式，结合轮图的结果以及环面的性质，得到了轮型图在环面上柔性的计算公式。

The beam longitudinal motions of the Lanzhou Heavy Ion Cooler Storage Ring have been studied in the presence of its Lattice design.

本文对设计中的兰州重离子加速器冷却储存环主环和实验环中束流的纵向运动进行了较为全面的研究。

And at last we get a basic whole structure: the big gear drives the annulus with the cupreous line to wrap and the rollers of nylon and cupreous compersate strain; due to the cupreous gear that the servo system drives tooth the big gear, which leads the big gear drives the annulus with the cupreous line to wrap; the impulse electric drives the clamping installation clamp loop and let it turn.

并最终确定了由大齿轮带动储线环环向运动喂线，利用尼龙挡环和铜挡环补偿张力；交流电机带动铜齿轮，由于铜齿轮和大齿轮啮合，而使大齿轮带动储线环进行缠绕；步进电机带动夹紧装置夹着芯模进行自身一步一步的转动的整体基本结构。

Gas speed through louver ring and gas speed from the space between dam ring and armor ring are very important.

通过百叶环的气流速度，以及通过挡环及防护环之间空间的气流速度是很重要的。

Aiming at the limitations currently existing in controlling mine excavator with magnetic triggers,such as slow dynamic response of system,poor dynamic index and excavator characteristics,as well as complicated structure,etc.,the strategy of double closed-loop excitation electric adjustment,i.e.current inner loop and voltage outer loop,is adopted to design an advanced electronic integrated control system for mine excavator.

目前矿用电铲常见的是采用磁性触发器进行控制，存在系统动态响应慢、动态指标欠佳、电铲特性不理想、结构复杂等缺陷，采用电流内环和电压外环的双闭环励磁电调方案，设计了一种先进的电子集成电铲电控系统，详细介绍了系统电路结构，尤其是电压、电流调节器及其反馈电路与特性适配电路的基本原理和功能特点。

In section one, We characterize when matrix ring, upper triangular matrix ring and trivial extension are simple J-injective rings.

在文章的第一部分我们给出了全矩阵环、上三角矩阵环和平凡扩张是单J—内射环的刻划。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。