机械作用

In addition, the filtering effect of structural transfer function and how to form a inverse pilter by making use of system transfer characteristics in frequency and time domain to identify the dynamic load were studied.

在第三章中，根据煤矿机械的特点，提出用三向加速度响应信号识别采掘机械三向力谱的方法，指出结构传递函数的滤波作用，同时在频域及时域内详细研究了如何利用传递函数构成反滤波器从而识别载荷频谱的方法。

Decreasing the parts' surface roughness, as it is shown after a long time practice that can realize the reliability and stabilization of the match; can reduce faction coefficient, wear, stress concentration, vibration, noises, and power consumption; can improve the operative precision and perceptivity; can increase the support area and contact intensity; and also can improve wear degree etc.

长期的生产实践表明，降低零件的表面粗糙度，对保证配合的可靠性和稳定性；对减少摩擦系数，降低动力消耗；对提高机械和仪器的工作精度和灵敏度；对增大支撑面积，减少磨损，提高接触刚度；对减少应力集中，增加耐疲劳强度，减少振动和噪声等均起着重要的作用：即表面粗糙度直接影响着机械和仪器的使用性能和使用寿命。

In previous studies, Cyclooxygenase-2(COX-2) is believed to be linked with inflammations and tumors. But in recent reports, COX-2 is found to play important roles in osteoblastic mechanotransduction and in bone remodification and resorptions in some ways. It was found that mechanical stretches, such as hydrostatic forces and pulsating fluid flow, could increase the expressions of COX-2 mRNA and then prostaglandins, and activate many signal pathways in osteoblasts.

环氧合酶-2(cyclooxygenase-2，COX-2)以往被认为与炎症、肿瘤等有密切关系，近年研究发现它在骨骼重建、骨质吸收以及成骨细胞力学信号转导中发挥着重要作用，主要表现为机械牵拉、流体力、节律性液体流(pulsating fluid flow，PFF)等机械刺激均能引起成骨细胞COX-2高水平表达，进而引起前列腺素(prostaglandins，PGs)量的增加，激活成骨细胞内多条信号传导通路。

Become the component of the subject equipment on the line of production cause , raise labour productivity, it is with important significance to fully give play to the role of playing the life tool instrument.This subject is the design using the theory of mechanics, mechanical

在起重运输机械中有些是不可缺少的运转设备，但更多的起重运输机械，其作用早已超出单纯的辅助设备范围，它们被直接应用于生产工艺过程中，成为生产作业线上主体设备的组成部分。

Then CMP comes into being, combining the chemical and mechanical actions so as to realize the precise removal of the surfaces to reach the higher level of surface roughness and surface waviness.

化学机械抛光便应运而生，它综合了化学的和机械的共同作用，实现了对部件表面的精密去除从而达到较高的表面粗糙度和表面波纹度。

Autogenous nucleus pulposus was removed from the coccygeal vertebral and placed into the back of left L(5~6) nerve root,The modle of the no...

结论杜仲腰痛丸有减轻非机械压迫性髓核对神经根损伤后所导致的机械痛觉过敏，提高痛阈的作用。

As a result, some ideas about the fabrication are put forward.The EPMA experiment results show that the main element such as W, Mo, Ti, Ni, Cu, Fe element are changed gradually in W-Mo and W-Mo-Ti FGM. In the layer rich in W, the grain are intervained and are mixed mechanismly. The same is to the layer rich in Mo and W-Mo. These grain felt up by some sinter. In Mo-Ti layer rich in Mo, the grains are also mixed mechanismly. Ni, Cu, Fe element assembled at interface. Ni melt by Cu plays an vital role in sinter effect. The microstructure characteristics result show that the compactness of W-Mo and W-Mo-Ti FGM is good.

电子探针实验结果表明W-Mo系、W-Mo-Ti系梯度功能材料中主要元素W、Mo、Ti、Ni、Fe、Cu分布整体上具有梯度变化规律，发现富W区、富Mo区、W-Mo混合区中颗粒交错分布，基本上以机械混合的形式存在，颗粒之间主要靠烧结剂的粘结作用实现致密化；以Mo为主要组分的Mo-Ti混合区，也是以机械混合的形式存在；Cu溶解于Ni形成固溶体更好地起到活化烧结能力，Ni、Cu、Fe在宏观层间界面富集，有利于烧结致密化。

The paper expounds the relationship among key elements from man-machine-environment system and the influence of man-machine engineering on machine design and manufacture.

通过对人机工程学与机械设计、制造的相互关系的解说，进一步对人—机—环境系统各要素间的关系和人机工程学对机械设计、制造学科的作用等方面作了阐释。

Slurry pumps are widely used for mining. Suffering from running liquid, their covering plates, volutes and vanes are easily corroded and worn, and the mechanical efficiency decreases to failure in a short time.

渣浆泵是矿山选矿车间重要的机械设备，由于矿浆的冲刷、摩擦和腐蚀的作用，渣桨泵的前后护板、蜗壳和叶轮等过流部件表面受磨损和腐蚀非常严重，短时间内就造成机械效率下降直至完全失效，严重影响着矿山的正常生产。

The result showed that the mechanical pulp quality, especially the shives content, dominates the surface strength of uncoated wood-containing paper.

结果表明，生产含机械浆未涂布纸时，配用的机械木浆质量尤其是纤维束含量对其表面强度的影响起主要作用。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。