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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The derivatives of the nonsmooth equations are computed to make the generalized derivative matrix nonsingular. Then the nonsmmoth damped Newton method is used to solve them.Analytic solutions of the KdV equation with variable coefficients: Shallow water wave problems belong to problems of free surface wave, and can be molded by the nonsmooth equations model given above in principle.

在前面建立的非光滑方程組數(shù)學(xué)模型和固定網(wǎng)格法基礎(chǔ)上欧洲欧美人成视频在线观看，利用廣義導(dǎo)數(shù)的概念給出了求解滲流自由面的一種新方法-----非光滑阻尼牛頓法，該法是對非光滑方程組求導(dǎo)污免费视频在线观看网址，適當(dāng)?shù)奶幚韽V義導(dǎo)數(shù)矩陣使其非奇異人人操人人大爽，利用非光滑牛頓法求解。

It is so smooth and glides on with a luminous look to it.

它是，因此使光滑和滑翔與光亮神色對它先锋高清无码。

The juices from the meats or vegetables result in a caramelized glaze which add depth to the flavor of the food.

裝玻璃人人摸人人看人人插，/上釉于，上光深夜在线观看网站，使光滑唐人呦一呦二在线播放，使光亮，/變得呆滯無神特级a级黄色网站；發(fā)呆

The results show that the concave structure ameliorates the surface stress distribution of the non-smooth sample, makes the local stress between concaves less apparently than that of the smooth sample, that means the local low stress areas are formed on the non-smooth surface.

結(jié)果表明：在受力狀態(tài)下，仿生非光滑凹坑改善了試樣表面的應(yīng)力分布十八禁止观看黄色网站，使非光滑試樣表面凹坑間的區(qū)域局部應(yīng)力明顯小于光滑試樣表面的應(yīng)力日韩台精品电影在线观看视频网站，即產(chǎn)生了局部低應(yīng)力區(qū)。

The results show that the concave structure ameliorates the surface stress distribution of the nonsmooth sample,makes the local stress between concaves less apparently than that of the smooth sample,that means the local low stress areas are formed on the nonsmooth surface.

結(jié)果表明：在受力狀態(tài)下国产白色视频在线观看2，仿生非光滑凹坑改善了試樣表面的應(yīng)力分布两根一起进，使非光滑試樣表面凹坑間的區(qū)域局部應(yīng)力明顯小于光滑試樣表面的應(yīng)力，即產(chǎn)生了局部低應(yīng)力區(qū)国产浮力网。

Each of the elevated temperature curves is moved along the horizontal time axis to longer times until it superposes on the reference temperature curve as smoothly as possible and then the master creep curve is obtained.

沿時間軸水平移動非參考溫度下的蠕變曲線段使之與參考溫度下的曲線圖光滑連接欧美黄色一级影院，形成一條光滑的主曲線圖。

Make(one's hair,a cat 's fur,etc)sleek

使光滑而發(fā)亮中文色婷婷国产精品视频。

The major works are as follows: 1 The 3-D numerical model of U-sharp flow passages is set up. The single-phase fluid flow and heat transfer are simulated for the U-sharp smooth and rib-roughened flow passages with FLUENT software. Their performance curves, temperature field and velocity vector are obtained and the local heat transfer and flow pressure-drop distribution along flow passage are analyzed. It is revealed that the ribbed flow passages can enhance heat-transfer and make the temperature more uniform, but it increases the pressure-drop to more extent. 2 The influences of diaphragm depth, channel width and board spacing on the performance are investigated.

建立了層疊式蒸發(fā)器U形流道的3維湍流模型在线一二区免费视频，用FLUENT軟件對尺寸相同的U形光滑流道和肋化流道中單相流體的傳熱和流動進行了數(shù)值模擬，得到了兩種流道的傳熱和阻力性能關(guān)系曲線及速度矢量圖小说亚洲图片、溫度場亚洲男人的天堂一区二区，分析了光滑流道和肋化流道的局部換熱系數(shù)及沿程壓降變化，結(jié)果表明流道的肋化能有效的增強傳熱人人超人人操人人操，而且使流體的流動和傳熱更加均勻日本色色色色色电影网站，但也較大地增大了阻力。

In this part, the set of CODONs is extended so that both open and closed curves containing straight lines and cusps can be completely represented.

該部分研究主要將傳統(tǒng)的基于封閉光滑輪廓的CODON編碼推廣至任意非封閉非光滑曲線黄色视频在线观看视频免费网站，使圖像的CODON編碼能更加完備地表征圖像輪廓免费无码黄片视频。

Dicaprylyl Ether：增加使用觸感,使肌膚光滑

Dibutylhydroxytoluene 羥基甲苯二丁酯 是酸化防止劑 | Dicaprylyl Ether 增加使用觸感,使肌膚光滑 | Dichloroacetic Acid 二氯醋酸 刺激麥拉寧色素由角質(zhì)層剝落

gibe：譏笑

germinate#發(fā)芽 | gibe#譏笑 | glaze#使光滑;變?yōu)殁g滯

Jojoba wax：荷荷芭蠟,去角質(zhì)国产一级a爱大片免费视频、使肌膚細緻光滑

Jojoba oil:荷荷芭油,富含營養(yǎng),舒緩久久国产超碰女女AV、保濕和柔軟 | Jojoba wax:荷荷芭蠟,去角質(zhì)、使肌膚細緻光滑 | Juniper:杜松精油,清潔欧美老妇午夜福利视频、排毒和激勵

Jojoba wax：荷荷芭蠟,去角質(zhì),使肌膚細致光滑

Jojoba oil:荷荷芭油,富含營養(yǎng),舒緩,保濕和柔軟 | Jojoba wax:荷荷芭蠟,去角質(zhì),使肌膚細致光滑 | Juniper:杜松精油,清潔,排毒和激勵

lubricous：光滑的

lubricity 光滑 | lubricous 光滑的 | lubrify 使?jié)櫥?/p>

Polished：不僅僅是"光滑"還有"有教養(yǎng)的

DEACTIVATE 使無效 | Polished 不僅僅是"光滑"還有"有教養(yǎng)的" | INDUCEMENT (不是"介紹"而是"引誘物")

SMOOTHY：光滑的

soften:使舒緩,使舒柔 | smoothy:光滑的 | shiny:光亮的

glazen：釉v.使表面光滑

gladiatorn.角斗士 | glazen.釉v.使表面光滑 | glibadj.流利圓滑的,善辯的

lubrify：使?jié)櫥?/p>

lubricous 光滑的 | lubrify 使?jié)櫥?| lubritorium 潤滑油加油站

Leaves skin smooth and invigorated：使肌膚光滑和搞活

Helps prevent clogged pores有利于防止堵塞毛孔 | Leaves skin smooth and invigorated使肌膚光滑和搞活 | Specially formulated for a man's skin專為一名男子的皮膚