查询词典 dynamical friction

A U-shaped friction disk A and several centrifugal springs connected to a friction block are installed to the output shaft of engine. Several centrifugal springs connected to another friction block are fixed to another U-shaped friction disk B. Said U-shaped friction disk has a central output shaft with small gear. The small gear, big gear and output chain wheel are installed to drive shaft.

在发动机的输出轴上装有&U&形摩擦盘和分别等分固接有连接摩擦块的数个离心弹簧，另一&U&形摩擦盘外等分固接有连接另一摩擦块的数个离心弹簧，另一&U&形摩擦盘开口朝向发动机内侧、镶嵌在摩擦块&U&形摩擦盘内侧间，另一&U&形摩擦盘外侧中心的输出轴上装有小齿轮；在传动轴装有另一小齿轮、大齿轮和输出链轮，大齿轮与另一&U&形摩擦盘上的小齿轮啮合；脚踩曲柄的轮轴上有与超越离合器相连的另一大齿轮与传动轴的另一小齿轮啮合。

The invention provides a low-friction sliding mechanism, a low-friction agent composition, a friction reduction method, a manual transmission and a final reduction gear unit that can exert very excellent low friction characteristics to sliding surfaces present under various applications, and, in particular, that have more excellent low friction characteristics than that of a combination of an existing steel material and an organic Mo compound.

本发明提供低摩擦滑动机构、低摩擦剂组合物、减小摩擦的方法、手动变速器和最终传动减速器，其在不同应用下会对所存在的滑动表面表现出极其优良的低摩擦特性，并且，尤其是其比现有的钢材和有机Mo化合物的组合具有更优良的低摩擦特性。

The author also studies the relationship between the maximum friction coefficient, optimum slip ratio, friction coefficent with locked wheels and three parameters in friction coefficient function of slip ratio, and three fit functions derived from experimental analysis, maximum friction coeffient, optimum slip ratio and friction coefficent v~ ith locked wheels, of aircraft speed.

利用试验数据研究了最佳滑移率、结合系数最大值和机轮抱死时的结合系数随飞机速度的变化规律。两者联系在一起，便得到了结合系数随飞机速度和滑移率的变化规律。它是本文的创新点之三。

When the car of system motive be stronger than the friction of the tire and will result in the tire lock die, once the occurrence tire lock die so tire and the friction of the ground from" quiet the friction"s become" to move the friction", not only the friction lowers significantly but even will lose to change direction to follow the vestige ability.

当剎车的制动力大过轮胎的摩擦力就会造成轮胎锁死，一旦发生轮胎锁死那么轮胎与地面间的摩擦就由『静摩擦』变成『动摩擦』，不但摩擦力大幅降低更会失去转向循迹能力。

This course consists of three parts : A.The fundamental theory of gyroscopes. a.Kinematics and dynamics of gyroscopes, consisting of Coriolis acceleration, theorem of angular momentum, Euler's dynamical equations, dynamical explanation of gyroscopes' properties. b.Gyroscopes' motion equations, including the complete equations, technical equations and precession equations derived from Euler's dynamical equations, and the technical equations derived from static vs. dynamic method. c.Analysis of gyroscopes' motion. d.Coordinate systems and their mutual transformation. e.Gyroscope drift and its measurement. B.Principle of typical gyroscope instruments, such as gyro compass, gyro north finder, gyro horizon, platform compass, rate gyroscope and integrating gyroscope. C.Principles and applications of new-type gyroscpes, such as electrically suspended gyro, ring laser gyroscope, fiber optical gyroscope, hemispherical resonator gyro, dynamically tuned gyroscope and micro inertial sensors.

本课程教学内容由三部分组成：陀螺仪的基本理论，内容包括：陀螺力学基础（哥氏加速度、角动量定理和欧拉动力学方程、陀螺特性的力学解释）；陀螺仪运动方程和运动分析（用欧拉动力学方程建立完整方程、陀螺仪运动的技术方程和进动方程，用动静法建立技术方程）；坐标系及其变换；陀螺仪的漂移及其测试；典型陀螺仪器（包括陀螺罗经、陀螺找北仪、陀螺地平仪、平台罗经、速率陀螺仪和积分陀螺仪等）的工作原理；新型陀螺仪（包括静电陀螺仪、激光陀螺仪、光纤陀螺仪、半球谐振陀螺仪、挠性陀螺仪、微机械陀螺仪等）的原理及应用。

Secondly, PSDS serves as a universal system for compact and totally disconnected dynamical systems (since OSDS cann't), and provides a moderate framework for characterizing orbit structures of general dynamical systems, in particular non-expansive dynamical systems.

其次，乘积符号动力系统是紧致完全不连通的动力系统的典型代表(我们知道符号动力系统不是紧致完全不连通的动力系统的典型代表)，它为刻画一般动力系统的轨道结构，尤其是非扩张动力系统的轨道结构提供了框架。

We review domestic and abroad research progresses of epilepsy by nonlinear dynamical theory and method, which include dynamical interpretation of epileptic pathogenesis, analysis of dynamical characteristic quantity of EEG signals during interictal and ictal stage, foundation of prediction mechanism and system.

我们综述了国内外采用非线性动力学的理论和方法对神经科癫痫研究的进展，包括发病机理的动力学解释，发作间期和发作期脑电图信号的动力学特征量的分析，以及预报机制的建立等；同时介绍了最近本课题组采用建模分析的方法研究癫痫脑电的主要结果，以及对癫痫发作过程的动力学性态变化规律的若干新发现；据此提出了研究中的一些问题和设想。

Though it is a long history of the research on static friction, many problems, such as relationship between static friction and static contact time, the relationship between static friction and load, and the prediction of static friction coefficient have not yet fully studied.

虽然静摩擦的研究历史很悠久，但仍有一些问题没有解决，如静摩擦与静止接触时间的关系，静摩擦与载荷的关系，以及静摩擦系数的预测等问题。

Therefore, the torque required to open the gate valve required torque than the closure of large, in addition, for a pair of contact between the sealing surface, the Non Rising Stem Resilient Seated Gate Valves coefficient of static friction between them than the dynamic friction coefficient, to make them from the static state generate the relative movement is required to exert greater force to overcome the static friction; due to temperature changes, so that the sealing surface pressure between the larger, need to overcome the static friction force also will be bigger, so that when you open the valve on the stem nut on the sometimes increase the torque exerted a lot.

所以，开启闸阀所需的力矩比关闭闸阀所需的力矩大，此外，对于一对互相接触的密封面来说，它们之间的静摩擦系数也比动摩擦系数大，要使它们从静止状态产生相对运动，需施加较大的力以克服静摩擦力；由于温度变化，使密封面间的压力变大，需要克服的静摩擦力也随之变大，从而使开启闸阀时，对阀杆螺母上施加的力矩有时会增大很多。" Moment analysis of valve operation "是由中国闸阀网提供的国际阀门新闻，译文仅供参考。另外，中国闸阀网还提供相关产品搜索：闸阀型号、闸阀价格、闸阀技术、闸阀新闻、闸阀生产商等。

The results indicate that as the value of fractal dimension is increased, the interfacial static friction coefficient first increases and then decreases; the interfacial static friction coefficient decreases as the fractal roughness parameter increases; while the inter-facial static friction coefficient increases as the material property or total normal load increases; the curve of static friction coefficient versus dimensionless total normal load is convex when the fractal dimension becomes smaller or fractal roughness parameter is larger or material property becomes smaller.

研究结果表明：界面的静摩擦因数首先随分形维数的增加而增加，然后随分形维数的增加而减小；界面的静摩擦因数随分形粗糙度参数的增加而减小，但随材料特性的增加而增加，也随总法向载荷的增加而增加；当分形维数较小或分形粗糙度参数较大或材料特性较小时，静摩擦因数－量纲一的总法向载荷曲线为凸弧。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。