查询词典 full-scale clearance

New cylinder head cover design, so that we adjust the engine valve clearance more convenient.

新颖的缸头盖设计，使发动机的气门间隙调节更加方便。

The effect of tribology factors on bearing vibration is studied experimentally. AR model and WPT are used to processing the normal arid abnormal signals. The results are as follows:1. The vibration of ball bearings is caused by the tribology action of contact pairs of ball and ring races and has the essential of tribo-dynamics. Any factors affecting the tribology characteristics of contact pairs will affect vibration and noise of bearings consequently.2. Vibration characteristics of bearing keep almostly unchanged with the increasing of axial load expecting the increasing of nature frequencies. When radial load increasing with axial load unchanged, nature frequencies keep unchanged but some new vibration peaks appears in the spectrum.3. Vibration amplitudes are damped and nature frequency are enhanced with sufficient lubrication. Vibration and noise of bearings increase obviously and roar can happen and the contact surfaces scratch slightly under insufficient and unclean lubrication state. Bearing will be disabled in a few minutes without any lubrication.4. Bearing vibration is unstable under low speed. With the speed increasing, the vibration become stable and natural frequencies increase slightly but the amplitudes increase apparently.5. Bearing vibration can be excited only by some harmonics ofwaviness without lubrication and by all harmonics with lubrication based on the theoretical analysis.6. The nature frequencies of ball bearings decrease with the increasing sizes. When international clearance increasing, nature frequencies decrease in radial and increase in axial and angular and the amplitudes increase in radial and decrease in axial and angular. When the number of balls increasing, nature frequencies increase and amplitudes decrease. When the pitch diameter increasing, axial nature frequency increase and others nearly keep no change. When outer race groove curvature radius increasing, nature frequencies increase in radial and decrease in axial and angular and amplitudes keep no change in radial and increase in axial and angular. When inner race groove curvature radius increasing, nature frequencies decrease and amplitudes increase.7. The distortion in amplitude and frequency components of bearing vibration signals picked up by the present probe measurement method is founded and right conclusions cannot be achieved by the signals. When accelerometer is rigidly screwed with steel stud onto a flat outer surface of a ball bearing, vibration signal can be got without distortion and the reliability of research on bearing vibration is assured.8. AR model is suitable for large samples of bearing vibration signals, square root of length of samples can be used as the upper limitation of order determination and the FPE order selection criterion is effective. Many advantages of AR spectrum are founded over the classical based on FFT.9. Time-Frequency analysis is necessary for abnormal noise of ball bearings. WPT overcomes the principle shortcomings of STFT and proved to be a best tool to process the abnormal signals.

理论分析和试验研究表明： 1球轴承振动是钢球—滚道接触副中的各种摩擦学作用引起的，具有摩擦动力学的本质，任何对接触副的摩擦学特性有影响的因素都将对球轴承的振动和噪声特性产生影响； 2中心轴向载荷作用下，载荷增大使球轴承的固有振动频率升高，载荷越大同样的载荷增幅引起的频率升幅减小，足够大的中心轴向载荷作用下载荷的变化对球轴承振动的频率特性不会产生明显的影响； 3轴向和径向联合载荷作用下，径向载荷不大时球轴承振动的固有频率基本不变，但是可能引起变刚度激励的非线性振动，出现新的频峰，过大的径向载荷将使部分钢球脱离接触，使球轴承的振动和噪声呈现不稳定状态； 4润滑对球轴承的振动和噪声特性有重要的影响，良好的润滑对振动有明显的抑制作用，润滑不充分时，振动和噪声的水平会有明显增高，一定条件下还会激发接触副中的谐振，发出啸声，造成接触表面的伤害，无润滑干接触时，短时的运转就会损伤接触副表面，使振动和噪声迅速增大，并随时可能引发严重的磨损和卡滞失效；接触副润滑良好时，油膜的"刚化效应"使球轴承振动的固有频率有所提高，润滑剂中含有弥散性污浊时，振动的幅度总体升高，但弥散性污浊不会改变球轴承振动的频率特性；浙江大学博士学位论文：球轴承振动的研究 5低速时，球轴承振动的基本特征呈现不稳定状态，随着转速的提高，球轴承振动的频率特性趋于稳定，固有频率频峰升高； 6理论分析表明，干接触时钢球和滚道表面波纹度的某些谐波分量能激励球轴承的振动，振动的幅值与谐波幅值成正比，实际球轴承中钢球的分布不可能完全均匀，波纹度的激励作用会随时发生；润滑接触的分析表明，波纹度的任意谐波分量均能激励球轴承的振动； 7球轴承的几何和结构参数分析表明，球轴承尺寸越大，径向、轴向和角振动的固有频率越低；钢球中心圆直径增大，球轴承的径向和轴向振动的固有频率基本不变，角振动的固有频率有所上升，振动的幅频特性基本不变；径向游隙加大使球轴承的径向振动固有频率降低，轴向和角振动的固有频率有所升高，径向振动幅频特性的幅值升高，而轴向和角向降低；钢球的数量增多使球轴承振动的固有频率上升，幅频特性的幅值下降，径向振动的幅值下降最为明显；外圈沟曲率半径系数增大使球轴承径向振动的固有频率升高，轴向和角振动的固有频率降低，径向幅频特性基本不变，轴向和角向幅频特性幅值升高；内圈沟曲率半径系数增大使径向、轴向和角振动固有频率均下降，振动幅频特性的幅值均有升高； 8试验对比表明，传感器采用探针式安装时，由于探针接触副接触特性的影响，钡(量得到的球轴承振动信号有失真，采用专门设计和制作的试验球轴承，以固定式安装加速度计，首次测量得到了球轴承振动的真实信号，通过对振动信号的分析，验证了球轴承振动的理论模型； 9)基于时间序列分析的AR模型适用于大样本球轴承振动信号的分析，以样本长度的均方根值作定阶上界，FPE做判阶准则，给出的AR谱光滑，频率分辨率高，是球轴承振动分析的简便而可靠的手段； 10以时频域分析的小波包变换分析球轴承异音信号能够比较好地定位和聚焦异音发生的时间，时间间隔，频率范围，同样是球轴承振动分析的可靠的手段，可用作球轴承故障诊断技术。

Based on the semi-active control theory, a new type clearance viscous damper is presented in this paper.

基于半主动控制理论，本文提出一种新型的间隙式粘滞阻尼器。

Intrapleural urokinase injection on TCHT was adopted in 25 cases. Clearance of blood clot and decortication of lung was adopted in 27 cases.

采用胸膜腔内注入尿激酶法治疗25例，行血凝块清除、纤维板剥脱术治疗27例。

It provided a useful data for the further study mechanism of the herb medicine in anti- decrepitude and the clearance free radicals.

测定结果为进一步探讨草药抗衰老、清除自由基的机理提供有用的数据。

To observe the effect of suaeda salsa seed oil on total cholesterol, Triglyceride, index of clearance of immunological deficiency mouse, and index of phagocytosis in the mouse.

目的 观察碱蓬籽油对高脂小鼠总胆固醇和甘油三酯含量及免疫力低下小鼠廓清指数、吞噬指数的影响。

Branch DeRe International Trade Co., Ltd also for other types of units, production enterprises and individuals to provide services related to foreign trade, are committed to resolve the import and export goods and foreign customers shipping, air transport, customs clearance, fumigation, commodity inspection, foreign exchange, Certificate of Origin, the Generalized System of Preferences Certificate of Origin and other import and export related businesses.

分公司DeRe International Trade Co。，Ltd还为其它各生产企业及各类单位个体提供相关的外贸服务，致力于为中外客户解决进出口货物海运、空运、报关、熏蒸、商检、结汇、产地证、普惠制产地证及其它进出口的相关业务。

Anticoagulation effect,APTT,antifactor Ⅹa activity,decrease rate of clearance capability of dialyzer...

透析中用国产LMWHNa可达到与SHNa相似的抗凝效果，而出血倾向明显减少

Methods of Antibacterial Test in Vitro and in Vivo2 4 Dinitrophenol Induced Fever in Rats, Perspiration on Rat Feet, Permeation of Capillary Vessel in Mice, Foot Swelling in Rats, Clearance of Carbon Particles in Mice were used to study the actions of anti bacteria, antipyretic, diaphoresis , anti inflammation and immunity regulation This product inhibited, to some extent, the staphylococcus aureus.

采用体内、外抗菌法；大鼠 2 ，4—二硝基苯酚致热法；大鼠足跖汗液着色法；小鼠毛细血管通透法；大鼠足跖肿胀法及小鼠碳末廓清法观察复方三效微型灌肠剂的抗菌、解热、发汗、抗炎、免疫调节等作用。

The damage of hepatic kupffer cells function and intestine mucosae protective screen function caused cooperatively by ischemia, hypoxia, microcirculatory disarrangement, inflammatory mediators (O〓, OH〓 etc) and cytokines (TNF-α, IL-1, IFN-γetc), the functional damage easily results in bacterial translocation and endotoxemia, as the damage mitigates the clearance of bacteria and toxin.

缺血、缺氧、微循环障碍、炎症介质及细胞因子（TNF-α、IL-1、IFN-γ等）共同作用，使肝脏Kuppfer细胞和肠粘膜屏障功能受损，对内毒素清除能力减弱致内毒素血症，是肝功能衰竭的重要病生环节，亦是继发多脏器衰竭的始动因素，但ALF致病确切机制目前尚不十分清楚。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48