小振动

Requests on resistance of corrosion destructibility of sealing interfaces that related to sealing up and cementing exercises in petroleum engineering are more and more of rigidity. It is urgently needs to resolve all sorts of problems that affect interface bonding quality. Conventional cement slurry design resist the destructive function worse, and can't like to satisfy the request to carry on latter production such as perforation, acidify, fracture etc.

常规油井水泥抵抗破坏的性能较差，不能很好满足水泥环抗冲击振动以及射孔、压裂等各种变形破坏的要求，这在一定程度上限制了小间隙、大位移、定向与水平井等特殊钻井工艺技术的发展，也制约了后期压裂、酸化等诸多开发工艺措施的实施。

As a thermal compensation device, bellows expansion joints can compensate for the pipeline's thermal growth and the equipment's movement, and absorb the pipeline's vibration, which have characteristics such as simple assembly, good airtightness, a small area coverage, durability, reliable quality, large compensation quantity, and so on.

波形膨胀节作为热补偿元件，能够补偿管道的热变形、机械位移和吸收管线振动，具有装配简单、气密性好、占地面积小、工作可靠、补偿量大等优点，在航空航天、核电、石油化工、水利、城建、电力、冶金等领域得到了广泛应用。

In the case of the small angular displacement, the natural frequency of the corresponding undamped linear system is obtained, which is consistent with the experimental observation.

通过讨论与小角位移无阻尼情形对应的线性无阻尼自由振动微分方程，得到了相应的固有频率，与实验结果一致。

Spiral bevel gear and other gear compared with the smooth work, noise and vibration on the merits, and its transmission efficiency can be as high as 99%.

弧齿锥齿轮与其他的齿轮相比，具有工作平稳，噪音和振动小的优点，并且它的传动效率可高达99%。

A two-component carbon tetrachloride system and a two-component aqueous system have been treated with the proposed strategy where only 21 calibration samples are needed, and the result showed that the predictive ability was not obviously impaired for the former system while being clearly strengthened for the latter one in comparison with a conventional way that required a calibration set of 100 samples.5 An unlooked-for experimental observation that in near-infrared spectroscopy the second overtone of aniline adsorbed by 13X molecular sieve nearly disappeared led us investigate a fundamental problem: the behavior of NIR when the outside space surrounding a molecule is too small to allow the molecule to vibrate freely.

同时，最小相关样本设计能进一步减少所需的校正样本数，且能提供更多合适变量以建立多元校正模型。这两方面的改进使模型的预测能力得以提高，其预测精度即使在水体系中也有明显的改善。五、近红外漫反射光谱在线非接触监测气-固吸附过程中出现了一个意外现象，即在近红外光谱上，被13X分子筛吸附的苯胺的二级倍频几乎完全消失了。这促使笔者深入探讨了近红外光谱的空间效应(当一分子被一足够小的刚性空间限制时，其振动的受限导致一级倍频和二级倍频强度均减少，并且后者减少的程度比前者更大)。

The lifting wavelet transform is used to construct wavelet to de-noise the vibration signal of turbo generator units.

针对电厂汽轮发电机组振动信号的噪声抑制问题，采用提升小波变换的方法构造小波。

Acorrding to the character that wavelet transform technique can localize thetime-domain and frequency-domain, it can focalize any detail of signals and can recognize theabrupt signal and nostationary signal. The characteristics of typical fault for the centrifugalcompressor rotor are extracted by wavelet transform, and the characteristics vector is foundedby using energy as element.

通过小波变换技术对时域和频域同时具有良好的局部化性质，可以聚焦到信号的任意细节，对突变信号和非平稳信号具有很强的识别能力，利用小波包变换对离心压缩机转子典型故障的振动信号进行特征提取，并以&能量&为元素，构造离心压缩机故障信号的特征向量，以便神经网络识别。

Based on the research of the HAAR wavelet the writer put out a method analyzing those signals of high-speed run-up state through HAAR wavelet.

论文对Haar小波的特性进行了深入分析，提出了一种基于Haar小波的快速启动过程振动信号的分析方法。

High-speed spindle system should have sufficient rigidity and high precision rotary; light weight, compact structure, small inertia; good thermal stability; vibration and noise; good cooling and lubrication system.

高速主轴系统应具有足够的刚度和高的回转精度；重量轻、结构紧凑，惯性小；良好的热稳定性；振动和噪声小；良好的冷却和润滑系统。

Consulting the anode effect detection method proposed by Xue and Oye, the authors propose a wavelet packet and spectrum estimation method to detect anode effect via vibration signals obtained from anode leaders.

参考Xue和Oye提出阳极效应检测方法，采用小波包与谱估计相结合的方法，对铝电解中阳极效应时阳极导杆振动信号进行小波包多层分解，以提取信号特定频段的频率特征。

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。