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- low lever vibration source 弱振源
- A vibration source and a medium are needed to form a mechanical wave. 机械波的形成需要振源和介质。
- Abstract: The monopoly operation of import books and periodical resources leads to the high price of foreign information resources, high information dissymmetry of resources and low lever of service. 摘要: 进口图书、期刊市场的垄断经营导致外文文献资源价格高昂、文献信息高度不对称以及经营者服务水平的低层次。
- The mechanism of vibration source convolution is analyzed,and a method for bispectra-blind source separation for convolved signals is proposed. 分析了振源卷积混叠机理,提出了一种双谱解卷积方法,并从盲源分离和波形恢复的角度对新方法的实用背景进行了概括。
- After dissociating the effective signals, we can locate the vibration source according to the time difference that can be got by using the analysis of correlation-function. 当找到需要的信号后,通过相关函数分析自动获取多道信号的相对时差,进而求取振源的位置。
- The paper introduces a new design of marine shafting flexible drive.High-elastic shaft coupling seperates two major vibration source of diesel engine and screw propeller. 介绍了一种全新的船舶轴系柔性传动型式,可承受推力的高弹联轴器隔断了柴油机和螺旋桨两大振动源;
- Volcano Tungurahua has started erupting again this year and continues erupting at a lower lever even today. 通古拉瓦火山今年再度喷发，甚至到今天还有较小的规模喷发。
- For prototype test and vibration source analysis on abnormal vibration of3# hydro generating set at Tianshengqiao first cascaded power station, it is useful to find out the vibration source by finite element computation for upper bracket. 对天生桥一级电厂3%23组上机架异常振动进行了真机实测及原因分析,得到的结果是:振动过大的主要原因是发电机转子质量不平衡,次要原因是机组轴线不直。
- According to the characteristic of the vibration source and the way by which the waves propagating, a simple prediction model is proposed for the ground vibration induced by trains. 根据振源特点及振动波的传播方式，本文提出一种列车荷载作用下地面振动预测的简化模型。
- Geometrical optics approach can only calculate the high frequency approach solution of drilling bit vibration source wave equation in non caustic area but it become invalid in caustic area. 由于几何光学法求解钻头震源波动方程的高频近似解有局限性,即在焦散区失效,故只能计算非焦散区的高频近似解。
- Analyzed the structural and run of currency count machine,identified the most noise source and vibration source in experiment method,and discussed the method of reducing vibration and lowering noise. 分析了点钞机结构和运行情况,用试验方法识别其主要噪声源和振动源,深入探讨了点钞机减振降噪方法,取得了显著效果。
- A monoaxial vibrating motor placed transversely on a sifter as a vibration source of a high speed sifter was developed in this paper. 提出将单轴振动电机横置于筛体上作为高速振动筛的振动源。
- For structure-borne NVH, the problem may be the vibration source, resonance system, transmission system or vibrating elements. 对结构振动噪音应从激振力、共振系统、传输系统、及振动元件著手；
- Mr. Lever had never before fallen so low as this. 利弗先生还从来未落到这步田地。
- Changing the cardan shaft fork, so that both sides of the mouth to form a flat schizaphis, generated new vibration sources. 在调换万向轴节叉时，给夺目使两脚的叉口成一立体，否则会爆发陈的波不静流。
- The government is trying to keep a low profile on this issue. 政府力图在这个问题上保持低姿态。
- The singer forced his low notes. 那位歌手勉强唱出低音。
- He because of bashful but low head. 他因羞愧而低下了头。
- The ship lay keeled over at low tide. 那艘船因退潮而倾覆。
- When a vibrating source of waves is approaching an observer, the frequency observed is higher than the frequency emitted by is lower than that emitted. 当振动着的波源逐渐靠近观测者时，测量到的频率比从波源发出的频率高。
