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The 'curette technique' also allowed for the collection of 'accidental' tissue fragments, utilized as microbiopsies.

结果:组织学诊断结果,总共473例中,96例鳞癌,高级别病变(口腔上皮内瘤变2/3)24例,其他353例。

However, the current diagnosis of cysticercosis still makes the results of CT or MR as main standard.

然而目前临床上对该病的诊断仍以CT或磁共振作为最主要的客观指标。

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。

Your medical and health data are processed on the basis of Article 7,§ 2,, of the Belgian Data Protection Act of December 8, 1992 when such processing is carried out under the supervision of a health professional and is necessary for the purposes of medical diagnosis, treatment or the management of health-care services and, on the basis Article 7,§ 2,, of the Data Protection Act of December 8, 1992 for any other purposes described in this Patient Informed Consent Form.

您的医疗及健康数据依照1992年12月8日颁布的比利时数据保护法案第7条§2款项进行处理,要求此类数据处理在医学专业人员的监督下进行,并且是为医学诊断、治疗或医疗保健服务管理之目的,以及在1992年12月8日颁布的数据保护法案第7条§2款项的基础上,为本患者知情同意书中所述的任何其他目的所必需的。

Fifty-three had the diagnosis of cirrhosis mentioned on the death certificate; of these, 36 had alcoholic cirrhosis.

在这 17 年期间,来自所有的因素死亡的总数是4207.53%的人在死亡证明书上被提到与肝硬化的诊断;这些人中,36%有了酒精导致的肝硬化。

First, there was the terrifying adrenaline whirlwind of diagnosis and decisions about treatment. And then there was the pain and debilitation of radical open surgery, then the worse pain of finding out that I had an unexpectedly aggressive Stage 3 cancer.

一开始是一系列可怕的肾上腺素治疗和诊断;然后是冒险的外科手术带来的疼痛和虚弱;然而最恐怖的时刻却是当我得知自己患上的是极具危险性的第三期癌症之时。

Background: Atrial septal defect is the most common congenital heart diseases .Exactly assessment of the site, shape, size and anatomic relation of the defect with its surrounding structures is essential for the clinical management of the patient.

研究背景:房间隔缺损(Atrial septal defect,ASD)的发病率在各种先天性心脏病(Congenital heart diseases ,CHD)中居首位,准确诊断缺损的部位、形态、大小及与周围组织的毗邻关系很大程度上决定了治疗方法的选择及治疗效果。

The defectiveness of rollerbearings can result in abnormal vibration and yawp of equipment, even seriousdamage to the equipment and procreant disaster.

因此,开展对滚动轴承的故障诊断具有很现实的意义。本文从理论上分析总结了滚动轴承典型故障产生的机理,并建立了不同故障状态下的理论模型。

The third is lubricous degree, symmetry and unsymmetry of knee and ankle joint track.

摘 要:在次最大强度下改变骑行变量坐角与坐高,结果表明:恢复阶段的曲柄角速度及膝、踝关节轨迹特征的理论论证与实际结果具有很好的一致性;参与本次实验的自行车运动员坐角不应小于72°、坐高不低于106%th的定位较为合理;初步确认了踏蹬技术的三种运动学诊断指标即提拉阶段的曲柄角速度、不同组合下踏蹬时上、下死点区域的大小,膝、踝关节中心轨迹的重叠程度、光滑程度、对称性与非对称性。

Patient male, 28 years old, at 4 appeared a few days ago the whole body, cold quiver calorific, temperature 39 ℃, the courtyard is diagnosed outside feel to go up, give hormone, antibiotic to reconcile treatment of hot demulcent drug, did not see improve, come my courtyard sees a doctor.

概要: 患者男性,28岁,于4日前出现全身、寒颤发热,体温39℃,外院诊断为上感,给予激素、抗生素和解热镇痛药治疗,未见好转,来我院就诊。

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