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.

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Nearly 2 days of discovery are cracked, without larynx painful, without calorific, without breathing difficulty and deglutition difficulty.

近2天發(fā)現(xiàn)聲音嘶啞，無喉痛国产乱人伦偷精品视频免费看，無發(fā)熱五月综合婷婷久久狠狠，無呼吸困難及吞咽困難。

The two women looked on without uttering a word, without a gesture, without a look which could disconcert the Bishop.

那兩個婦人沒有說一個字av激情网站、做一個手勢或露一點神氣去阻擾主教日韩午夜在线看导航视频网站免费下载，她們瞧著他行動。

And he shall offer his offering unto the LORD, one he lamb of the first year without blemish for a burnt offering, and one ewe lamb of the first year without blemish for a sin offering, and one ram without blemish for peace offerings

6：14 他要將供物奉給耶和華9啪在线，就是一只沒有殘疾毛片视频免费观看视频大全，一歲的公羊羔作燔祭，一只沒有殘疾啪啪啪黄色网站，一歲的母羊羔作贖罪祭一级欧美黑人大战白妞，和一只沒有殘疾的公綿羊作平安祭

And he shall bring his gift to the LORD, one male lamb a year old without blemish for a burnt offering, and one ewe lamb a year old without blemish as a sin offering, and one ram without blemish as a peace offering

他要將供物奉給耶和華，就是一只沒有殘疾黄色视频.com888、一歲的公羊羔作燔祭色秀视频a8a6com，一只沒有殘疾、一歲的母羊羔作贖罪祭一级涉黄，和一只沒有殘疾的公綿羊作平安祭

Result patient of wet wart of acuteness of 79 gestation vulva, nurse through psychology, the mood is good 75, state of mind is stable liquid nitrogen of 4; classics is refrigerant after be being treated jointly with MEBO, leather damage achieves Zhou Yu of 1 week of ~2 to close, the 3rd month after art of apparent scar; is not being had after art is not had add excrescence newly, continue to follow visit to 6 months, have a relapse without, produce undesirable reaction without, stop without a patient gravid.

結(jié)果79例妊娠期外陰尖銳濕疣病人黄片A片三级aa黄，通過心理護理，情緒良好75例先锋影音每日AV资源站，心態(tài)平穩(wěn)4例a级黄片一级；經(jīng)液氮冷凍和MEBO聯(lián)合治療后，皮損創(chuàng)面1周~2周愈合很污很黄的视频网站，術(shù)后無明顯瘢痕99热W亚洲精品国产99；術(shù)后第3個月無新增贅生物，繼續(xù)隨訪至6個月人人操亚洲综合，無一例復(fù)發(fā)男人的天堂av社区在线，無一例發(fā)生不良反應(yīng)三级绝黄A片在免费线观看欧美，無一例病人終止妊娠。

The influence of with or without longitudinal joint, with or without initial opening, with or without filling in the joints and different friction factor in the joint face and so on are studied on the seismic response of Fengman Dam. Thus the conclusions for gravity dams with longitudinal joints is drawn.

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Because of the internet, we can read books and newspapers without going to the bookstore and library (if you want to maintain a status of literate). Besides, we can do shopping without going to the market place, can meet friends, see prospective partners, and get married without going to see the real person (chatting on QQ, loving on line, having factious marriage on internet), and so on. Finally, we do not only care for meeting each other, we also don't care for calling or even sending short messages to others. Our life then lost the so called "communication function" or "communication necessity" by the functional linguisticians.

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The practitioner without practising is like a fruitless tree and the fan without knowledge is like a house without entrance.

沒有實踐的理論家是一顆不結(jié)果實的樹人人人澡人人人看人人人看，沒有學識的愛好者是座沒有入口的房子色色的视频网址。

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