小振动

To winding engine systems like elevators, only after complete study of dynamics of mechanic-electric system including driving motors is done and advanced control technique is introduced, design of the winding system of minimum vibration can be done.

对于电梯类提升系统来说，只有对包含拖动电机在内的机电系统的动力学问题进行系统的研究，并结合引进现代先进的控制技术，才有可能使设计出的提升系统中的提升容器、提升钢丝绳以及提升机本身的振动达到最小。

Wavelet packet decomposition; statistical characteristic analysis; normal distribution; mechanical vibration; trolley track

工程科技II，工业通用技术及设备，声学工程小波包分解；特征参数；正态分布；机械振动；岸桥小车轨道

Alternative sound conceptions include : the sound is produced by vibrations, how sound travel, and the "string" telephone.

一、学童所持有「声音」之另有概念部分：学童存有「声音由物体振动产生」、「声音如何传递」及有关「小话筒」等三类另有概念。

Sting Ray represents the first generation of programmable torpedoes and attention has been turned to the problems of how to harness the vast computer powers now available with their associated software programs, how to package the maximum computer power in the smallest possible space, and how to improve still further the processing and filtering techniques so vital to exclude extraneous noise and vibration.

分析：并列分句attention has been turned to the problems…里的the problems后的介词of 接有三个由疑问词how +动词不定式短语构成的并列成分。filtering techniques：滤波技术，鱼雷利用该技术可以滤掉海洋里产生的干扰声源和鱼雷在水里运动时产生的振动和噪声，所有这些干扰都会对装在鱼雷上的声纳产生干扰，从而影响其探测功能。译文：&鳐鱼&代表着第一代程序控制鱼雷。人们已经将注意力转到如何利用现有的巨大计算机能力及其相关软件程序，如何在尽可能小的空间内容纳最大的计算机能力，以及如何更进一步改进对于排除外来噪声和震动来说至关重要的处理与滤波技术等问题上。

In order to understand engine vibration caused by malfunctions such as improper spark-plug gap, deposit, spark-plug wear, injector failure, unfit belt tension, loosening of spark-plug cable, misfire, this study employs time-frequency analysis which is based on Short Time Fourier Transform.

为了要了解引擎在常见之故障如火星塞的积碳、间隙变小与磨损、喷油嘴积碳卡住、皮带松动、火星塞高压线松动造成单缸失火等现象时引擎振动的变化，本文采用短时傅立叶转换之时-频分析。

Air density's effect is very little, however, optimum vibration frequency decreases with the solution's viscosity increasing, and increases with the solution's surface tension and the solution's density increasing.

结果表明，空气密度对频率影响很小，最优振动频率随胶液粘度的增大而减小，随胶液表面张力和胶液密度的增大而增大。

In this paper, a new homotopy technique based on the parameter expansion is proposed to study strongly nonlinear oscillation .

提出了一种基于参数展开的新的同伦分折技术：结合参数展开技术和同伦理论将一非线性动力系统(不要求系统内含有小参数)的求解问题转化为组线性微分方程的求解问题，并将之运用到强非线性振动领域。

The Major Planet Carriers Topology Optimization needs to submit to the intensity conditions when its Structure Stiffness and Nature Frequency change as little as it can.

大行星架结构拓扑优化需要在满足强度条件的前提下，使得结构的刚度、固有振动频率改变最小。

A new advanced blasting technique in China, delay in hole and sequence out hole blasting technique, was adopted in underwater blasting excavation of guide ditch ahead of water conveyance tunnel at Xiaowan Hydropower Station, thereby the controlling aim of high explosive rate and low single dynamite weight was achieved, the maximal particle vibration velocity was controlled in allowable range, guaranteed the safety of Cofferdam and rock dam and entrance water tower and so on, provided powerful guarantee for the successful guide water of the guide tunnel.

小湾水电站导流隧洞进口围堰堰外引渠水下爆破开挖采用了目前国内较为先进的孔内延时，孔外微差的爆破技术，整个爆破区分为多段起爆，从而达到高单耗，低单响药量的控制目的，将质点的最大振动速度控制在允许范围内，有效保证了围堰、围堰岩埂灌浆帷幕区及进水塔等建筑物的安全，为导流隧洞顺利导流提供了保证。

A new advanced blasting technique in China, delay in hole and sequence out hole blasting technique, was adopted in underwater blasting excavation of guide ditch ahead of water conveyance tunnel at Xiaowan Hydropower Station, thereby the controlling aim of high explosive rate and low single dynamite weight was achieved, the maximal particle vibration velocity was controlled in allowable range, guaranteed the safety of Cofferdam and rock dam and entrance water tower and so on, provided powerful guarantee for the successful guide water of the guide tunnel.

简介： 小湾水电站导流隧洞进口围堰堰外引渠水下爆破开挖采用了目前国内较为先进的孔内延时，孔外微差的爆破技术，整个爆破区分为多段起爆，从而达到高单耗，低单响药量的控制目的，将质点的最大振动速度控制在允许范围内，有效保证了围堰、围堰岩埂灌浆帷幕区及进水塔等建筑物的安全，为导流隧洞顺利导流提供了保证。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。