振动

In this study, we hoped to clarify the mechanisms of pitch control in the pneumatic artificial larynx. METHODS: Three fluent Mandarin speakers using pneumatic artificial larynx devices were studied following total laryngectomies. They were asked to produce sounds in different pitches by following scales upward and downward.

使用气动式人工喉的音调控制，只能透过呼出气流通过橡皮膜片下压力的大小来控制振动的基本频率，本研究即在探讨橡皮膜片振动频率是否也像声带振动一样受到橡皮膜片驱动压力的影响，测量喉全切除患者在使用气动式人工喉发声时之橡皮膜片驱动压力和声音基本频率，并探讨此些病人在发声时之音调控制的原理。

In chapter 2, based on analysis for the existed methods of torsional vibration measurement, a novel measuring method, parallelling dual-beam laser doppler torsional vibration measurement is first put forward by the author, it not only divides translation and rotation of the rotor, but also can be used to measure torsional vibration of non-cylinder rotor.

本文的第二章在分析现有扭转振动测量方法的基础上，首次提出平行双光束激光多普勒扭转振动测量方法，它不仅解决了转子平动与转动的完全分离，还能测量各种非圆形截面转子的扭转振动；为辨别转子的转动方向，还提出双频激光多普勒测振仪，满足故障诊断对测量启、停转子和转速方向变化转子性能的要求。

A uniform mixture of silicon powder (granularity≤0.044 mm) and polyvinyl alcohol solution (PVA,5 wt%) in response to a certain proportion was prepared.After sieving,prilling and vibration,the mixture was packed.Effects of the vibration frequency (14～50 Hz) and time (10~230 s) on packed density of powder were studied.

摘 要：将Si粉（粒度≤0.044 mm）和聚乙烯醇水溶液(聚乙烯醇质量分数为5%)按一定比例混匀，过筛造粒后，振动装料，研究了振动频率（14～50 Hz）和振动时间(10~230 s)对粉料填充密度的影响。

YZK12B vibratory roller, with splice pad footplate installed on its drum face, effects great linear loads. It's capable for triturating, squeezing, compacting. It can not only compact non-cohesive soil, but also cohesive soil.

YZK12B 型振动压路机，其振动轮的表面可安装拼接式凸块板，拆卸方便，在振动时可产生极高的线载荷，对物料进行捣碎、挤压、压实，它不但可以碾非粘性土壤，而且特别适合粘性土壤，真正实现一机多能。

It follows that when the two men alight in each other's territory, and go about their business and pleasure, whatever vibrations are passed back by one to his native habitat will be felt by the other, and vice versa, and thus return to the transmitter subtly modified by the response of the other party may, indeed, return to him along the other party's cord of communication, which is, after all, anchored in the placeswhereshe has just arrived; so that before long the whole system is twanging with vibrations travelling backwards and forwards between Prof A and Prof B, now along this line, now along that, sometimes beginning on one line and terminating on another.

这样一来，当这两个人分别降落在对方的领地，开始各自的工作和生活时，其中一个人通过纽带传回给故土的任何振动，都会被另一个人感觉到，而后者的反应会使传回给发送者的信息发生微妙变化--事实上，这些信息可能是通过另一方的纽带传回去的，毕竟，这条纽带是固定在他刚刚到达的地方。于是，用不了多久，随着A教授和B教授之间的来回振动感应，整个系统就会嗡嗡作响：这些振动一会儿沿着这条纽带，一会儿又通过那条，有时从这一条开始，又在那条结束。

After studying casting process from ladle to pouring box and protection casting supporting mechanical structure, vibration dynamics model of supporting structure is founded, also variation of stee...

通过对钢包到中间包保护浇注的过程及其支承结构的相关研究，建立保护浇注支承结构的振动动力学模型，并且考虑对钢液冲击力的变化及影响测振点振动的因素，利用基本小波处理方法对钢水振动信号进行初步分析，并通过小波包技术进行进一步的特征提取，最终实现对钢液状态的有效识别。

After studying casting process from ladle to pouring box and protection casting supporting mechanical structure, vibration dynamics model of supporting structure is founded, also variation of steel water impact force and influencing factors of inspecting spot vibration are discussed. Primary analysis is done for steel water vibration signal by the way of basal wavelet processing method, and the deeply feature extraction is finished to realize the effective recognition for steel water status using wavelet package method.

通过对钢包到中间包保护浇注的过程及其支承结构的相关研究，建立保护浇注支承结构的振动动力学模型，并且考虑对钢液冲击力的变化及影响测振点振动的因素，利用基本小波处理方法对钢水振动信号进行初步分析，并通过小波包技术进行进一步的特征提取，最终实现对钢液状态的有效识别。

This method selects two parameters, energy and variance, as the characteristic parameter of trolley track, and successfully in extracts the feature frequency belt of trolley track vibration. Furthermore, this technology is applied to practical engineering programs and has good veracity and reliability.2. According to the research of this thesis on the trolley tracks\' present data, the status classification of trolley track with normal distribution is presented. This method divides trolley tracks\' situations into five parts and perfects the classifying method of trolley tracks\' mechanical situation.

具体工作如下；1、将小波包分析方法运用到岸桥小车轨道振动信号的分析中，选取能(来源：A65BC0f论c0文网www.abclunwen.com)量与方差作为轨道的振动特征参数，有效提取出铰点部位与非铰点部位的振动特征频段。2、将正态分布原理引入到岸桥小车轨道铰点机械性能状态的划分之中，并用最大熵概率分布加以验证，准确地反映了实际情况，并定义了正态分布诊断准则的状态分级评价的原则和临界点，方便和简化了状态判断的决策过程。

Company-efficient products ZSJG heavy shaker; SDY-round, and so thick shaker; ZK-linear shaker; coal preparation; automatic feeding belt conveyor; road blocks, Lu Yanshi, hollow brick block making machine; Taiwan Vehicles; cold-formed; pile-drivers, tankers and other products.

公司主导产品有ZSJG高效重型振动筛；SDY型等厚圆振动筛；ZK型直线振动筛；选煤机；自动给料带式输送机；路面砖、路沿石、空心砖砌块成型机；台车；冷弯机；打桩机、罐车等系列产品。

Four conditions of shock vibration during chain breaking have been discussed. 1. Breaking test on simple testing machine with main cylinder fixed on a foundation.

本文以四种不同的振动模型，探讨了锚链拉力试验机在链环断裂时的冲击振动问题，并以例题说明了它们的振动特性。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。