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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Objective To develop a new Two-step magnetic resonance electrical impedance tomography algorithm based on radial basic function neural network for imaging electrical impedance distribution of a head.

目的基于徑向基函數(shù)（radial basic function，RBF）神經(jīng)網(wǎng)絡(luò)的兩步核磁共振電阻抗成像（magnetic resonance electrical impedance tomography亚洲美女高潮久久久久久，MREIT）算法丁香久久综合，對人體頭部進(jìn)行MREIT。

YAN Dandan,ZHANG Xiaotong,ZHU Shanan,Bin HeAbstract: Objective To develop a new Twostep magnetic resonance electrical impedance tomography algorithm based on radial basic function neural network for imaging electrical impedance distribution of a head.

目的 基于徑向基函數(shù)(radial basic functionxx视频网站，RBF)神經(jīng)網(wǎng)絡(luò)的兩步核磁共振電阻抗成像(magnetic resonance electrical impedance tomography尤物视频品爱网，MREIT)算法，對人體頭部進(jìn)行MREIT欧美十八禁性爱视频。

Surgical decompression of CRVO via Radial Optic Neurotomy is a new, technically feasible and safe procedure, and there were no serious complications noted and improved visual function with this procedure.

放射狀視神經(jīng)切開術(shù)（Radial Optic Neurotomy 韩国三级A片久久久久， RON）是2001年Opremcak等[1]首次提出的一個(gè)嶄新的概念久久久久精品妇女999，將CRVO的治療引入了一個(gè)新的領(lǐng)域国产日韩欧美亚洲精品，現(xiàn)將近幾年有關(guān)RON治療CRVO的相關(guān)文獻(xiàn)綜述如下。

This thesis focuses on surface reconstruction from point cloud model, and have discussed and extended three common methods: Moving Least Squares method, Radial Basis Functions method and Multi-level Partition of Unity method.

本文以點(diǎn)云模型曲面重構(gòu)為研究對象999久久久久精品影院，研究并擴(kuò)展了三種常用曲面重構(gòu)方法：最小移動(dòng)二乘法(MLS：Moving Least Squares Method)法最新毛片基地免费看无码，徑向基函數(shù)(RBF：Radial Basis Functions method)法和多層次單元分割(MPU：Multi-level Partition ofUnity method)法。

Direction of the human radial artery by the cubital fossa at the midpoint of the bottom of 2.5CM connection to the radial styloid process is not a vertical direction of blood vessels, a large number of data measurement, based on the basis of the treatment instrument designed to meet the ergonomic parameters of the radial artery into the actual trajectory of the laser positioning warehouse ladder-type arrangement, thus ensuring the laser projection domain and the radial artery into a high degree of matching of the laser spot can be an accurate projection exposure to the region in the radial artery through the line to avoid exposure is invalid.

人體橈動(dòng)脈的走向是由肘窩中點(diǎn)下方2.5CM處至橈骨莖突的連線伊人网999，并非是一條垂直走向的血管欧美激情,亚洲综合一区二区，在大量數(shù)據(jù)測量的基礎(chǔ)上，本治療儀依據(jù)人體工程學(xué)參數(shù)設(shè)計(jì)了符合橈動(dòng)脈血管實(shí)際走向軌跡的激光定位倉階梯型排列一级作爱片网址，從而保證了激光器投影域與橈動(dòng)脈走向的高吻合度国产精品精品国内自产拍，使激光投影的光斑能準(zhǔn)確照射在橈動(dòng)脈循行區(qū)域，避免無效照射最近能看黄色网站。

A hemadynamometer has an air bag designed for attaining oppression or ischemia of radial artery only without oppressing ulnar artery, with a length of the bag made, when the bag is wound on a user's wrist on its radial side starting from such hard organization area as tendons on palm side of the wrist through the radial artery, to reach at least styloid process of radius but not to reach the ulnar artery, and with a width set for locally oppressing the radial artery at least substantially right above the styloid process of radius in longitudinal direction of the wrist.

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objective to assess the effects to utilize minitype plate internal fixation in radial head fracture of mason ⅲ.methods 10 cases of patients with closed radial head fracture under went minitype plate internal fixation by open reduction,and the functional evaluation of elbow was carried out by the pain,stability,myodynamia of elbow,together with the elbow joint score of broberg and morrey.results in 10 case of patients with 12～24 months follow up(average time 20 months),the elbow joint mean score is 58(30～90) with excellent case 1,good 4,poor 5,and the fineness rate is 50％.conclusion it is failed to treat complicated radial head fracture by minitype plate internal fixation,while maybe it is better to resect or replace radial head for these types.

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The results were as follows the airdried density ( moisture content of wood is 12%), the basic density and the ovendry density were 0.583 g·cm-3, 0.462 g·cm-3 and 0.507 g·cm-3 respectively, the airdried density was at the medium level in domestic wood species;the shrinkage coefficient of radial, tangential and volumetric were 0.099%, 0.183% and 0.296% respectively, the maximum swelling were 4.106%, 7.958% and 12.627% respectively;the ratio of tangential shrinkages to radial shrinkages was 1.5-1.9;the toughness was 52.12 kJ·m-2;the hardness of cross, radial and tangential section were 41.53 MPa, 31.41 MPa and 35.51 MPa respectively;the compressive strength parallel to grain was 44.50 MPa ;the modulus of elasticity in static bending and the bending strength were 12.63GPa and 127.31 MPa respectively;the shearing strength parallel to grain of radial and tangential were 8.76 MPa and 10.54 MPa respectively;the cleavage strength to grain of radial and tangential were 124.3 N·mm-1 and 138.6 N·mm-1 respectively.

結(jié)果表明大葉櫟木材的氣干密度（含水率為12％）狼友分享视频、基本密度和全干密度分別為0.583 g·cm-3、0.462 g·cm-3和0.507 g·cm-3思思精品视频在线观看，氣干密度屬于國產(chǎn)木材的中等級水平1024在线看电影基地；徑向、弦向和體積干縮系數(shù)分別為0.099%福利在线视频观看、0.183%久久一热久久、0.296%，濕脹率依次為4.106%久久精品视频一区二区、7.958%和12.627%亚洲年轻娇小性，差異干縮為1.5-1.9，其尺寸穩(wěn)定性較好日韩制服无码人妻师生；沖擊韌性為52.12 kJ·m-2日韩中文福利片观看网站，端面、徑面和弦面硬度分別為41.53 MPa永久免费Av无码网站,国产、31.41 MPa和35.51 MPa很很操狠狠干很很日，順紋抗壓強(qiáng)度為44.50 MPa，抗彎彈性模量和抗彎強(qiáng)度分別為12.63 GPa和127.31 MPa手机看片,你懂的，徑面和弦面順紋抗剪強(qiáng)度分別為8.76 MPa和10.54 MPaww黄色一级视频，抗劈強(qiáng)度依次為124.3 N·mm-1和138.6 N·mm-1湿女孩视频网站。

In the process of practical operation of radial gates, the vibration of radial gates often occurs in the following situations: when radial gate is being opened or closed or part-opened, and sometimes even under the completely closed condition. Under some situations, the vibration of radial gate is so serious that the dynamic failures of radial gates or dynamic instability of some gate components may happen.

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