使过干

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。

Terrain heightened can enhance blocking effect, which lead to strengthen water vapor flux divergence and vertical convection, and cloud water increases but centralizes in the middle-low level. This change intensify accretion of snow by collecting more supercooled cloud water, and rain water converts into graupel by collecting more snow, and dry growth of graupel increase at the same time. Rain water augment because of more graupel melting, and rain water continue to increase by collecting cloud water in the low level.

地形高度增加后，阻挡作用加强，使水汽通量辐合加强，垂直气流增大，中低层云水增多，导致雪撞冻过冷云水增多，促使了雨水撞冻雪转化为霰和霰干增长过程的加强，霰融化为雨水增多，低层雨水碰并云水加强，冷云过程得到增强。

This single Stick, which you now behold ingloriously lying in that neglected corner, I once knew in a Flourishing State in A Forest, it was full of Sap, ful l of Leaves, and full of Boughs; but now, in vain does the busie Art of Man pret end to Vye with Nature, by tying that wither'd Bundle of Twigs to its sapless Tr unk;'tis now at best but the Reverse of what was, a Tree turn'd upside down, th e Branches on the Earth, and the Root in the Air;'tis now handled by every Dirt y Wench, condemn'd to do her Drudgery, and by a Capricious kind of Fate, destin' d to make other Things Clean, and be Nasty it self: At Length, worn to the Stumps in the Service of the Maids,'tis either thrown out of Doors, or condemn'd to its last use of kindling Fires.

请看看这根扫帚把，它现在灰溜溜地躺在偏僻的角落，而以前我曾在树林里碰见过它，那时它风华正茂，汁液充沛，枝叶繁盛。如今它完全变了样，却还有人自作聪明，想靠人类的手工同大自然竞争，拿来一束枯枝捆在它那早已干瘪的身上，结果是枉费心机，不过颠倒了它原来的位置，使它枝干朝地，根梢朝天，成为一株头朝下的树，然后落在干脏活累活的女仆们的手里使用。从此它受命运的摆布，把别人打扫干净，而自己却变得又脏又臭，在女仆们手里折腾多次之后，最后被扔出门外，或者作为引火的柴禾被投进火里。

More common in the humid and frequent contact with the water, that is often humid environment, as well as the work of dealing with water, in this part of the work completed immediately after dry towel dry the body and replaced by drying clothes; out sudden rain, all wet clothing, dry towel should be immediately wiped away the body rub to the skin after flushing fever, and then replaced by warm water wash drying clothes, the clothes not just take off the wet, immediately wash with hot water that the invasion force in alpine wetland in the summer after the sweat labor hill, also not immediately rinse with cold water into the pond or swimming, because porokeratosis closure, resulting in cold dampness of the air invasion.

受潮湿多见于与水接触过频的人，即经常在潮湿环境中工作以及与水打交道的工作人员，这部分人员在工作完毕之后，应立即用干毛巾擦干身体，换上干燥衣服；外出突遭雨淋，衣衫尽湿者，应立即用干毛巾擦干身体，擦至皮肤潮红发热之后，再用温水洗净换上干燥衣服，切勿潮湿之衣服刚脱下，马上用热水洗澡，以致迫寒湿入侵体内；在夏季劳动后大汗淋漓，亦不可马上用冷水冲洗或入池游泳，因为汗孔未闭，易使寒湿之气入侵。

It gave me pleasure to sit on the terrasse of the little tabac and observe her as she plied her trade, observe her as she resorted to the same grimaces, the same tricks, with others as she had with me.

坐在那间小香烟店的露天座位上看着她干她的营生使我很开心，我观察她用对付过我的同样手段对付别人，她做同样的鬼脸、玩同样的把戏。

If the finished product label rewinder too tight to self adhesive in the kitchens of squeezes result in boronizing gum, exfiltration glue will stick to the back of the backing sheet so that full-volume label is not easy to loosen.

如果成品标签复卷过紧就会造成不干胶中的粘胶剂被挤出导致渗胶，渗出的胶水会粘在底纸的背面使整卷标签不容易松开。

But when most people are working harder for less; when others cannot work at all; when the cost of health care devastates families and threatens to bankrupt many of our enterprises, greatand small; when fear of crime robs law-abiding citizens of their freedom; and when millions of poor children cannot even imagine the lives we are calling them to lead, we have not made change our friend.

但是，当多数人干得越多反而挣得越少的时候，当有些人根本不可能工作的时候，当保健费用的重负使众多家庭不堪承受、使大大小小的企业濒临破产的时候，当犯罪活动的恐惧使守法公民不能自由行动的时候，当千百万贫穷儿童甚至不能想象我们呼唤他们过的那种生活的时候，我们就没有使变革成为我们的朋

But when most people are working harder for less; when others cannot work at all; when the cost of health care devastates families and threatens to bankrupt many of our enterprises, great and small; when fear of crime robs law-abiding citizens of their freedom; and when millions of poor children cannot even imagine the lives we are calling them to leadwe have not made change our friend.

但是，当多数人干得越多反而挣得越少的时候，当有些人根本不可能工作的时候，当保健费用的重负使众多家庭不堪承受、使大大小小的企业濒临破产的时候，当犯罪活动的恐惧使守法公民不能自由行动的时候，当千百万贫穷儿童甚至不能想象我们呼唤他们过的那种生活的时候，我们就没有使变革成为我们的朋友。

Mix the Crystallizing Powder with clear water. Then spread it on the stone surface, and spray a proper amount of clear water to keep the stone wet. Polish with a floor rubbing machine or special crystallizing machine together with a whitening cushion. Always keep the floor wet during and never be too dry polishing. Each operation covers about 3~5 square meters.

将结晶粉加清水调成糊状后均匀涂于石材表面，并喷洒适量清水使石材保持湿润，然后用擦地机或专用结晶机配合白洁垫进行抛磨，（抛磨过程中至终保持地面湿润，切勿过干），每次工作区域大约在3~5平米左右。

Lotus Food for Cats is also loaded with antioxidants, which neutralize free radicals, slowing the development of degenerative and cardiovascular diseases, as well as reducing the risk of cancer. Things like pumpkin, carrots, cranberries and blueberries don't just make for a delicious meal, they can help slow the aging process! And of course, we would never leave out Lotus' unique blend of soybean oil, olive oil, salmon oil and evening primrose oil, which, along with ground flax seed, offer vital omega-3s and -6s, helping to maintain the body's natural healing processes, decreasing inflammation, and increasing stamina.

所以，为了使LOTUS能有更高质量的保证，他们选择了用另一种模式生产，就是以大型炬炉炬制LOTUS的产品，因为炬制的食品更能保存当中的矿物和营养，而且油份较小，另外，在烤炬过程中，温度是很重要的一环，只能保持在华氏260度至华氏280度之间，因为如温度过高，产品便会因水份流失而道至过干，情况就如烤炬曲奇或蛋糕一样，变因为制作需时，所以生产数量普不多，但在质量上却更有保证。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。