使通过的

When the system is at work, IF output power is achieved through adjusting inverter trigger angular frequency, which can always make the power out put be in the biggest state . Through the effect of the voltage and current closed-loop ,IF power achieve constant power output.

由于系统在工作时，中频电源的输出功率是通过调节逆变触发角频率来实现的，这样就可以始终使输出的功率处于给定的最大状态，并且通过电压和电流闭环作用，使中频电源达到恒功率输出。

Therefore if thou shalt separate from thyself, that is, from thy understanding, whatever others do or say, and whatever thou hast done or said thyself, and whatever future things trouble thee because they may happen, and whatever in the body which envelops thee or in the breath, which is by nature associated with the body, is attached to thee independent of thy will, and whatever the external circumfluent vortex whirls round, so that the intellectual power exempt from the things of fate can live pure and free by itself, doing what is just and accepting what happens and saying the truth: if thou wilt separate, I say, from this ruling faculty the things which are attached to it by the impressions of sense, and the things of time to come and of time that is past, and wilt make thyself like Empedocles' sphere

因此，如果你是自己，也就是说使你的理智同这些事情分开－即不管别人做或说了什么，不管你自己做或说了什么，不管将来可能发生什么事情使你苦恼，不管在将你包裹的身体中，或者在天生与身体结合在一起的呼吸中，有什么东西违背你的意志而附着于你，不管那外部缠绕的事物旋涡是如何旋转，为了使免除了命运束缚的理智力自身能纯粹和自由地活动，那么去做正当的事，接受发生的事和诵出真理吧，我说，如果你使这种支配能力脱离开那些通过感官印象而附着于它的事物，脱离开那些未来的和过去的事物，你就将使自己像恩培多克勒的球体一样

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。

Program found the large popularity precisely because of its integration, which allowto pass entire process of creating the musical disk of any size practically from zero.

程序发现大受欢迎，正是因为它的一体化，这使通过的整个过程，创造音乐的磁盘的任何大小几乎从零发展。

They did at last give the people constitutions and the franchise; but even after that they obtained leave to continue despotic by becoming paternal. They made themselves too efficient to be dispensed with, too smoothly operative to be noticed, too enlightened to be inconsiderately questioned, too benevolent to be suspected, too powerful to be coped with.

他们希望通过这种作法来完善他们的国家机器，从而消灭一切令人讨厌的摩擦；通过这种作法，以及对被统治者利益的关心，来使政府的措施变得温和，从而使一切起阻碍作用的仇恨得到和解；他们还殷勤而及时通过这种作法来向一切经营事业的阶层提供帮助，从而使国家本身变成一切勤劳人民所不可缺少的东西。

If as a result of body shell keycap stuck with the key causes of the "key card" failure, may be key in the cap and put a gasket between the pads can be used稍硬some plastic (such as floppy disk jacket abandoned) made, its size is equal to or slightly larger than the key body size, and location by the rod through the ammonium can open a free passage under the square hole, in accordance with its set of poles, the plug cap; use this pad chip cap with the key body to prevent stuck, you can repair button; If as a result of spring fatigue, shrapnel resistance causes large card key failure, then the Special button to open the body, a little stretching to restore flexibility to reset the spring; Remove the key precursor to the resumption of shrapnel.

若是由于键帽与键体外壳卡住的原因造成"卡键"故障，则可在键帽与键体之间放一个垫片，该垫片可用稍硬一些的塑料做成，其大小等于或略大于键体尺寸，并且在按杆通过的位置开一个可使铵杆自由通过的方孔，将其套在按杆上后，插上键帽；用此垫片阻止键帽与键体卡住，即可修复故障按键；若是由于弹簧疲劳，弹片阻力变大的原因造成卡键故障，这时可特键体打开，稍微拉伸复位弹簧使其恢复弹性；取下弹片将键体恢复。

While urgent vehical arriving,such as fire engine or police wagon,all traffic lights are put to be red in order that they can pass by quickly. Consequently,the mode improves the efficiency of traffic.

当如消防车、警车等需要紧急通过的车辆到来时，则使所有灯置为红灯，从而使其快速通过。

I thank the gods for giving me such a brother, who was able by his moral character to rouse me to vigilance over myself, and who, at the same time, pleased me by his respect and affection; that my children have not been stupid nor deformed in body; that I did not make more proficiency in rhetoric, poetry, and the other studies, in which I should perhaps have been completely engaged, if I had seen that I was making progress in them; that I made haste to place those who brought me up in the station of honour, which they seemed to desire, without putting them off with hope of my doing it some time after, because they were then still young; that I knew Apollonius, Rusticus, Maximus; that I received clear and frequent impressions about living according to nature, and what kind of a life that is, so that, so far as depended on the gods, and their gifts, and help, and inspirations, nothing hindered me from forthwith living according to nature, though I still fall short of it through my own fault, and through not observing the admonitions of the gods, and, I may almost say, their direct instructions; that my body has held out so long in such a kind of life; that I never touched either Benedicta or Theodotus, and that, after having fallen into amatory passions, I was cured; and, though I was often out of humour with Rusticus, I never did anything of which I had occasion to repent; that, though it was my mother's fate to die young, she spent the last years of her life with me; that, whenever I wished to help any man in his need, or on any other occasion, I was never told that I had not the means of doing it; and that to myself the same necessity never happened, to receive anything from another; that I have such a wife, so obedient, and so affectionate, and so simple; that I had abundance of good masters for my children; and that remedies have been shown to me by dreams, both others, and against bloodspitting and giddiness...; and that, when I had an inclination to philosophy, I did not fall into the hands of any sophist, and that I did not waste my time on writers of histories, or in the resolution of syllogisms, or occupy myself about the investigation of appearances in the heavens; for all these things require the help of the gods and fortune.

我感谢神明给了我这样一个兄弟，他能以他的道德品格使我警醒，同时又以他的尊重和柔情使我愉悦；感谢神明使我的孩子既不愚笨又不残废，使我并不熟谙修辞、诗歌和别的学问，假如我看到自己在这些方面取得进展的话，本来有可能完全沉醉于其中的；我感谢神明使我迅速地给予了那些培养我的人以他们看来愿意有的荣誉，而没有延宕他们曾对我寄予的愿我以后这样做的期望（因为他们那时还是年轻的）；我感谢神明使我认识了阿珀洛尼厄斯、拉斯蒂克斯、马克西默斯，这使我对按照自然生活，对那种依赖神灵及他们的恩赐、帮助和灵感而过的生活得到了清晰而巩固的印象，没有什么东西阻止我立即按照自然生活，然而我还是因为自己的过错，因为没有注意到神灵的劝告（我几乎还可以说是他们的直接指示）而没有达到它；我的身体置于这样一种生活之外如此之久，我从未达到本尼迪克特或西奥多图斯的高度，但在陷入情欲之后，我还是被治愈了；虽然我常常达不到拉斯蒂克斯的那种气质，但还是没有做过使我悔恨的事情；虽然我母亲不能尽其天年而终，但她最后的年月是与我在一起的；在我希望帮助任何需要帮助的人的时候，或在任何别的场合，我都不感到我缺乏这样做的手段；而对我自己来说却不会有同样的需要：即需要从别人那里得到的东西；我有一个十分温顺、深情和朴实的妻子；我有许多优秀的教师来教育我的孩子；通过梦和其他办法，我发现各种药物来治疗咯血和头昏……当我有一种对哲学的爱好时，我没有落入任何诡辩家之手，没有在历史作品上，或者在三段论法的解决上浪费时间，也没有专注于探究天国的现象；而上面所有这些事情都要求有神灵和命运的帮助。

I have a cat named Mimi. Its hair is as white as snow. I often play games with it. It amuses me a lot and I treat it as a little friend. Every morning, I would say goodbye to it before I go to school and Mimi would wave its front-legs to me.

设计意图：通过阅读可以逐步培养学生用英语进行思维和表达的能力；阅读与写作又紧密联系在一起，通过仿写作文，可以使学生熟悉各种不同的文体，使学生的写作能力得到进一步的提高。

If as a result of body shell keycap stuck with the key causes of the "key card" failure, may be key in the cap and put a gasket between the pads can be used稍硬some plastic (such as floppy disk jacket abandoned) made, its size is equal to or slightly larger than the key body size, and location by the rod through the ammonium can open a free passage under the square hole, in accordance with its set of poles, the plug cap; use this pad chip cap with the key body to prevent stuck, you can repair button; If as a result of spring fatigue, shrapnel resistance causes large card key failure, then the Special button to open the body, a little stretching to restore flexibility to reset the spring; Remove the key precursor to the resumption of shrapnel.

若是由于键帽与键体外壳卡住的原因造成&卡键&故障，则可在键帽与键体之间放一个垫片，该垫片可用稍硬一些的塑料做成，其大小等于或略大于键体尺寸，并且在按杆通过的位置开一个可使铵杆自由通过的方孔，将其套在按杆上后，插上键帽；用此垫片阻止键帽与键体卡住，即可修复故障按键；若是由于弹簧疲劳，弹片阻力变大的原因造成卡键故障，这时可特键体打开，稍微拉伸复位弹簧使其恢复弹性；取下弹片将键体恢复。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。