Accompanied with the growth of economics in Taiwan, between Taipei, the political and economical center city, and Kaohsiung, the southern center city, there has been a great amount of increasing traffic volume.

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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 Galleria, and other imaginative shopping centers throughout the United States, have led a magazine to title its recent leading article "The Malling of America."

由于蓋拉里和美國其他的購物中心，使得一家雜志社在新近的一篇頭條報道中把標題定為"購物中心化的美國91亚洲精品。"

A new cylinder type forage cutter with high operation was designed and manufactured. Construction design and its performance parameters, helical angle of moving knife, setting height of fixed knife, overload protective device, throwing device and edge shape of fixed knife were analyzed. The results of test were as follows: optimal helical angle of moving knife was 20°, optimal setting height of the center of the cylinder above fixed knife was 20 mm, line speed of blower vane was 13.6m/s ,power consump...

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Firstly, the article introduces the definition of error of lens center in the old and new national standard, and summarizes three present systems that can confirm the lens center. Then we discuss the theory and formula of self-collimation catoptric method. On the basis of self-collimation theory, some apparatuses were designed (including internal-focusing center scope and center error measure instrument etc).

首先介紹了新舊國家標準關于透鏡中心誤差的定義，歸納和總結了目前物鏡裝校定中心的三個體系色色色亚洲图，討論了光學系統(tǒng)中心誤差自準反射法測量原理大乱婬交欧美视频一区、公式和測量方法，以及根據(jù)自準反射法測量原理而設計開發(fā)的定中心儀器——內(nèi)調(diào)焦定心儀婷婷六月丁香综合、中心偏測量儀等設備操逼免费视频网址。

The concepts in References 1 and 2 are broadened and the properties of the centrosymmetric and skew centrosymmetric matrices are exploited in detail.

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The treatment was performed using 4 to 6 arcs delivering with noncoplanar isocenter beams. 13 patients treated with one target,47 patients treated with multi-targets.60 patients who were treaded with SRT received a mean dose of 54.7±6Gy with a 4～8Gy/f,3f/w,qod regimen,the dose were divided 6～12times.

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Steel banding before the foundation set in the center of the cushion, and cross through the center axis for vertical and horizontal, and then through the center ring for radiation tendons and tendon distance and ring the number.

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First, the angular velocity function and maneuver load for certain maneuver flight (including hover, dive-hike and these two combined) are set up. The simulation results of the vibration of double-disk rotor system with cantilever supported on rigid bearings show that rotor would be apparently deformed under maneuver load. Second, the performance of oil force of SFD in maneuver flight is analyzed. The results show that in maneuver flight, the SFD with centering spring will become eccentric and its oil force will be time-related and offset-related.

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First, the angular velocity function and maneuver load for certain maneuver flight (including hover, dive-hike and these two combined) are set up. The simulation results of the vibration of double-disk rotor system with cantilever supported on rigid bearings show that rotor would be apparently deformed under maneuver load. Second, the performance of oil force of SFD in maneuver flight is analyzed. The results show that in maneuver flight, the SFD with centering spring will become eccentric and its oil force will be time-related and offset-related. Then, SFDs are introduced into typical Jeffcott rotor system. The whole system will be statically displaced in maneuver flight and the nonsynchronous components of oil force appear in the response of rotor system.

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centering：定中心

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Centering ball：(萬向節(jié))定心鋼球

Center hole grinder 中心孔磨床 | Centering ball (萬向節(jié))定心鋼球 | Centering device 定中心裝置

Centering device：定中心裝置

Centering ball (萬向節(jié))定心鋼球 | Centering device 定中心裝置 | Centering machine 打中心孔機

centre punch mark：定中心點

centre punch 沖心鏨 | centre punch mark 定中心點 | centrifugal acceleration 離心加速度

centre punch mark：定中心點, 定中心點

centre punch 沖心鏨 | centre punch mark 定中心點, 定中心點 | centrifugal acceleration 離心加速度

self-centering punch：自定中心沖

自定中心夾頭 self-centering chuck | 自定中心沖 self-centering punch | 自凈化作用 self-cleaning action

self-centering punch：自定心沖孔器

self-centering mandrel 自動定中心軸 | self-centering punch 自定心沖孔器 | self-centering screen 自動定心式篩分機

chuck, self-centering：自定中心夾頭

速換夾頭 chuck, quice-change | 自定中心夾頭 chuck, self-centering | 聯(lián)動夾頭 chuck, universal

self-centering mandrel：自動定中心軸

self-centering internal measuring instrument 自定心內(nèi)表面測量儀 | self-centering mandrel 自動定中心軸 | self-centering punch 自定心沖孔器

Centering apparatus for photographic transparencies：用于攝影透明度的定中心裝置

090209 投影銀幕 Projection screens | 090183 用于攝影透明度的定中心裝置 Centering apparatus for photographic transparencies | 090282 照片曬印干燥設備 Drying apparatus for photographic prints