小振动

On the basis of former studies, the effects of seismic stress history on the small strain shear modulus G_ of Fujian sands and Qiantangjiang silts with different relative density under one-way and two-way dynamic is inverstigated.

本文在前人研究基础上，对多向振动下不同相对密度的福建标准砂与钱塘江粉土开展地震应力历史对小应变剪切模量影响的研究。

It uses a small motor to create vibrations to make it...

它使用一个小马达，创造振动，使其。。。

Compared with ring reducer which had same power, the balance ring reducer had many functions, such as low vibration noise, low cost and less production difficulty.

试验证明，平衡式环式减速器与同功率其他环式减速器相比具有振动噪声小的优点，同时降低了减速器制造成本和加工难度，具有重要的理论意义和工程实用价值。

Belt press filter series of 500,750,1000,1500,2000,2500,3000 type, a rack made of carbon steel and stainless steel are the most advanced domestic product is a new type of dehydration equipment, with handling capacity, filter Cake containing liquid is low, filter effects, and low energy consumption, vibration small, smooth running characteristics, widely applicable to various activated sludge, digested sludge and mixed sludge dewatering and production of new industrial materials industry dehydration .

带式压榨过滤机系列有500、750、1000、1500、2000、2500、3000型，机架材质有碳钢和不锈钢两种，本产品是国内最先进的新型脱水设备，具有处理能力大、滤饼含液量低、过滤效果好、能耗低、振动小、运行平稳等特点，广泛适用于各种活性污泥、消化污泥及混合污泥的脱水和新产业行业生产过程的物料脱水。

Vibration signal; ball mill; coal level; wavelet transform; signal analysis

振动信号；球磨机；料位；小波分析；信号处理

The analysis results indicate that the vibration fractional factor with rotating frequency has a close relationship with both rotating speed of rotor and damping of bearing under constant acceleration. When rotating acceleration is small and damping is large, the transient response is not sensitive to the variation of rotating speed; otherwise the imbalance response with constant acceleration and the response in stable state will build up obvious differences near critical rotating speed.

研究结果表明：在恒加速条件下，转子同频振动分量与转子的转速、支承阻尼等因素密切相关，当角加速度较小且阻尼较大时，其瞬态响应对转速的波动不敏感；而当角加速度较大或阻尼较小时，恒加速过程不平衡响应与稳态响应在临界转速附近将产生明显的差异。

Production 200mm ~ 600mm, 400 400 mm, 500 500 mm of ordinary and high-density graphite electrode, using domestic technology of the sophisticated production of 3500 tons extrusion press; production 800mm ~ 1200mm above the carbon electrode, the use of domestic advanced horizontal high-frequency, amplitude of vibration of hydraulic molding machine production; calcination using low energy consumption, temperature, gas-balanced ring-type baking furnace; dipping into the cold out of hot billet; graphitization process color 16000KVA transformers, high current, low voltage, constant power; finished electrodes used comb knife domestic advanced way of processing, deviations small, with closely.

生产Φ 200mm ～Φ 600mm 、400×400㎜、500×500㎜普通和高密度石墨电极，采用国内技术成熟的 3500吨挤压机生产；生产Φ 800mm ～Φ 1200mm以上的炭素电极，采用国内先进的卧式高频、调幅液压振动成型机生产；焙烧采用能耗低、温度均衡的燃气式环式焙烧炉；浸渍坯热进冷出；石墨化工艺彩 16000KVA 变压器，大电流、低电压、恒功率；成品电极采用国内先进的梳刀方式进行加工，偏差小、配合紧密。

Therefore, the research on a new type of drainage pump assembly with less vibration and lower noise has important military significance for improving the concealment and security of native submarine, and also its'working environment.

因此开展振动小、噪声低的新型疏水泵组的研究，对改善我海军潜艇的工作环境，提高潜艇的隐蔽性、安全性等都有重要的军事意义。

On account of the high pressure and squeezing action, it operates with less noise and vibration than a drop-forge.

由 于较高的压力和挤压作用，它比落锤锻造噪声及振动都小得多。

Thereby, the relation between the gap and the viscous oil is optimized, and the ball balancers effectively exhibit a balancing function and thus minimize the vibration and noise of the washing machine.

从而，优化了间隙与粘性油之间的关系，并且球平衡器有效地显示平衡性能，因而使洗衣机的振动和噪声最小化。

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。