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弥散性

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To prepare a kind of Chinese traditional medicine extract liquid to substitute for absolute alcohol with low toxicity,good dissemination and led tumor necrosis more complete.

制备一种能够替代无水乙醇的,毒性低、弥散性好、可使肿瘤坏死更完全的中药提取液。

A new point about the mechanism of the large-scale extension in Late Carboniferous - Early Permian in study area is presented that this large-scale extension is caused by the intrusion of asthenosphere mantle.

7对区内晚石炭世—早二叠世发生的大规模弥散性伸展作用的机制提出了新解释,认为是大规模的软流圈地幔上侵结果

Blood Platelet ; Cryoprecipitate coagulum ; Disseminated Intravascular Coagulation

血小板;冷沉淀;弥散性血管内凝血

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。

The distribution characteristics of primary neurons in skin referral area and gastric mucosa are that spinal ganglions present segmental distribution and superposing with each other,moreover,sympathetic ganglions present diffused distribution and have no segmental distribution,which may be the neural basis of treating visceral pain by intracutaneous- injection drug.

结论胃痛的皮肤牵涉区与胃黏膜初级神经元分布的特点是在脊神经节呈节段性分布且相互重叠,在交感神经节呈弥散性分布,无节段性分布,也相互重叠,这可能是皮内注药治疗内脏痛的神经基础。

Horny pearls and parakeratosis cells in cancerous nests centres were stained negative. The positive cells were distribution of mass, even diffusion, in moderate and poor differentiation.

在恶性度较高的肿瘤中阳性细胞呈团块状或片状灶性分布,甚至于呈弥散性分布,在肿瘤向周围组织浸润的边缘区阳性细胞最为密集。

So it can be used in research of the confusional information of the image. This study focuses on the recognition techniques of the fatty liver based on complexity analysis.

本研究采用复杂性分析方法与模式识别技术对肝脏超声图像进行描述,由于弥散性和非弥散性的肝脏疾病的一个特点就是会破坏正常的组织结构,在B超图像上就反映为图像纹理的改变。

Results Expression of CYPⅡE1 in rat nonalcoholic steatosis by high fat diet wasprominent in hepatic acinar zone...

结论非酒精性脂肪肝肝细胞色素P450ⅡE1在腺泡3区的表达增强,并呈弥散性的分布,与酒精性脂肪肝的表达相似,并可能与脂质过氧化反应有关。

The present findings regarding multisegmental inneration to ertebral bodies may explain the diffuse pain that originates within osteoporotic ertebral fractures in elderly patients.

关于腰椎椎体是由多节段神经支配的研究结果解释了老年患者发生骨质疏松性椎体骨折后为何出现弥散性的疼痛。

The patients of the Type-2 diabetes exist restrictiveness,traffic jam and mixed ventilation function obstacle,exsist disperseness function obstale also.

Ⅱ型糖尿病患者既存在限制性、阻塞性和混合性通气功能障碍,又存在着弥散性功能障碍,其发生与糖尿病患者的血压、空腹血糖、早餐后2h血糖、HbA1C、甘油三脂、胆固醇、尿微量白蛋白等明显相关。

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Plunder melds and run with this jewel!

掠夺melds和运行与此宝石!

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻,也许正是在通往天国的路上,我体验着这白色的晕旋。

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单击"保存"会将文件保存到主持人的硬盘或服务器上,而不是您自己的计算机上。