查询词典 up to scratch

Next time you practice your serve, rather than trying to achieve the back-scratch position, try to point the butt cap--the end of the handle where you see the company logo--straight up toward the sky when your racquet is all the way back.

下次你练习发球时，别想着做那个挠背动作，在拍子在身后的时候试着将球拍的底帽(上面有拍子公司的logo)指向天空。

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。

I do not want to give up , I just want to start from scratch.

我不是想放弃，我只是想从头开始。

Liu Zhaoxi expresses, the new business culture of Internet times has 6 big features: The first, internet is very transparent; The 2nd, equal, go up in the net no matter big company, small company, have a piece of skin only, it is to stand on same scratch line so; The 3rd, sincere letter, con on Internet risk is more than con accrual far, if make bad conduct,go up in Internet, others can give leave an opinion, tell him all friends, make you undesirable fame instant spreads everywhere to whole Internet; The 4th, internet is a place that can share most; The 5th, responsibility, produced shake of earth of plain of short of Wenshui River last year, internet is the first trade that starts relieve the people in disaster, clean out treasure, Tecent, Alibaba to wait to halloo for aseismatic raise one's arm providing disaster relief in succession.

陆兆禧表示，互联网时代的新商业文明具有六大特征：第一，互联网非常透明；第二，平等，在网上不论大企业、小企业，都只有一张皮，所以都是站在同一起跑线上；第三，诚信，在互联网上欺诈风险远远大于欺诈收益，在互联网上如果做不好的行为，别人会给留评价，告诉他所有朋友，让你不良声誉瞬间传遍整个互联网；第四，互联网是一个最能分享的地方；第五，责任，去年发生汶川大地震，互联网是第一个发起赈灾的行业，淘宝、腾讯、阿里巴巴等都纷纷为抗震救灾振臂高呼。

Go up after the century 20 years, china is mixed through reforming and opening a series of major strategy act that devote oneself to economic construction, national power times add, won the respect of world each country not only, more on the new scratch line that makes oneself stand in to build comparatively well-off society in the round.

上世纪后20年，中国通过改革开放和致力于经济建设的一系列重大战略举措，国力倍增，不仅赢得了世界各国的尊敬，更使自己站在了一个全面建设小康社会的新的起跑线上。

Allan : I'm so sorry. I didn't 1mean to scratch you up.

艾伦：对不起啦，我不是故意抓妳的。

The author remembers be in 2004 the left and right sides, the market proportion of Google and Baidu is not very great disparity, cannot saying is to deuce the world, but most at least also calculates going up is to be on same scratch line, the netizens when the author still remembers becoming call Google kindly dog dog (this renown date was used by fast thunder grab now, but the earliest be Google of big guy appearance, what a website that holds out fire calls dogginess at that time of and so on, can make the LOGO of copy Google style, what write below is dog dog) use Google is absent a few, especially stationmaster people very like be happy to believe with Google(now also is, stationmaster friends still prefer to use Google, common netizen is used to Baidu).

笔者记得在2004左右，Google和百度的市场比例并不是很悬殊，不能说是平分天下，但最起码也算得上是在同一起跑线上，笔者还记得当时网友们亲切的称Google为狗狗(这个名号现在被迅雷抢去用了，但最早是大家伙形容Google的，当时有个挺火的网站叫什么爱狗吧之类的，能制作仿Google风格的LOGO，下面就写的是狗狗)使用Google不在少数，特别是站长们很乐于用Google(相信现在也是一样，站长朋友们还是更喜欢使用Google，普通网友习惯于百度)。

Create your own prize fighter from scratch and immerse yourself in gaming's most involving boxing universe - featuring up to 100 characters spread across 3 weight classes.

创建自己的奖战斗机从无到有，自己浸泡在游戏的大部分，涉及宇宙拳击-配备多达1 00个字符遍布三体重级别。

Baby ten months of my home, and I now only吃米粉and milk, as well as breast milk has not broken, other baby started to eat rice porridge, but he does not seem to swallow it, even Apple he will scratch cards to feed into the mud like to eat is not a day that is added to the egg yolk and rice flour Heinz, I am worried that your baby can not keep up nutrition, In addition, the baby is easier to spit, when the hard stool is spit often.

我家宝宝十个月了，一直到现在还只是吃米粉和牛奶，还有母乳也没断，别的宝宝开始吃些稀饭了，但是他好像吞不下去，就连苹果给他刮成泥喂也会卡到一样，到现在还不能吃，每天就是加了蛋黄和亨氏的米粉，我担心宝宝营养跟不上，另外，宝宝比较容易吐，大便的时候用力都经常会吐。

Nobody loves you when you're down and out [00:18.29]Nobody sees you when you're on cloud nine [00:26.92]Everybody's hustlin' for a buck and a dime [00:35.16]I'll scratch your back and you scratch mine [00:44.54]I've been across to the other side [00:52.89]I've shown you everything, i got nothing to hide [01:01.46]And still you ask me do i love you, what it is, what it is [01:11.71]All i can tell you is it's all show biz [01:19.34]All i can tell you is it's all show biz [01:32.64]Nobody loves you when you're down and out [01:41.31]Nobody knows you when you're on cloud nine [01:49.88]Everybody's hustlin' for a buck and a dime [01:58.67]I'll scratch your back and you knife mine [02:07.40]I've been across the water now so many times [02:16.16]I've seen the one eyed witchdoctor leading the blind [02:24.87]And still you ask me do i love you, what you say, what you say [02:33.11]Everytime i put my finger on it, it slips away [02:41.46]Everytime i put my finger on it, it slips away [03:26.88]Well i get up in the morning and i'm looking in the mirror to see, ooo wee!

当你落魄潦倒的时候，没有人爱你 [00：18.29] 当你是在云九上的时候，没有人看见你 [00：26.92] 每个人 hustlin'为一块钱和一个一角硬币我将擦你的背面和你擦伤的我的 [00：44.54] 我有是横过到另一边我有显示你每件事物的， i 什麽也不得到到兽皮我做 i 的你问和剧照爱你，它是什么，它是什么所有的 i 能告诉你的是它所有的是演艺事业所有的 i 能告诉你的是它所有的是演艺事业 [01：32.64] 当你落魄潦倒的时候，没有人爱你 [01：41.31] 当你是在云九上的时候，没有人认识你 [01：49.88] 每个人 hustlin'为一块钱和一个一角硬币我将擦你的背面和你刀的我的 [02：07.40] 我有是横过水现在如此许多次 [02：16.16] 我有看眼的 witchdoctor 领先盲人我做 i 的你问和剧照爱你，你说的事情，你说什么 Everytime i 把我的手指放在～上它，它滑倒离开 Everytime i 把我的手指放在～上它，它滑倒离开好的 i 在早晨起床的和我正在顺便探访镜子看见， ooo 很小的！

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。