对轴

4DRG was co-culture with sciatic nerve segment in 10鸖 DMEM;the axons were longer and surround the sciatic nerve segment which was regard as anew evidence for chemotropism.

结果：(1)在无血清条件下单独培养的DRG，背根神经节的轴突数目众多，外形纤细弯曲，不成束，并且施万细胞和成纤维细胞稀少，所以可以排除两者对轴突生长的影响，为观察来源于变性坐骨神经段的可溶性因子对轴突生长的作用提供了有利条件；(2)在无血清条件下DRG和变性坐骨神经段联合培养，①先单独培养DRG，4天后待神经元轴突长出，再与坐骨神经段联合培养，观察到神经元的轴突数目减少，外形挺直，部分轴突之间相互粘附成束；②变性坐骨神经段和DRG同时联合培养，神经元的轴突数目明显减少，外形粗壮，轴突之间相互粘附成束；(3)有血清条件下单独培养DRG，轴突数目较多，外形挺直，长短不一，部分神经元的轴突之间相互粘附，施万细胞和成纤维细胞数目众多，观察到的轴突生长情况受到施万细胞和成纤维细胞的直接或者间接的影响。

In general, the design work with traditional measures is done by hand, which cannot meet the needs of the technology and manufacture. So the author has developed a CAD hydraulic design software fit for lower specific speed axial flow runner, which is easily operated by users.The main research work of this paper is as follows:1 Analyzing the main reason of axial flow power station cannot work well under littler volume of flow in some season and putting forward an improving scheme, pointing out the characters of design under abnormal factors.2 Combined with the development of the industry in our country, the abnormal hydraulic design method of propeller turbine is discussed based on present literature, data and experiment results.3 Guided by the design method of software engineering, a suit of hydraulic design software of Lower Specific Speed Axial Flow Runner is programmed by the object-oriented programming language Visual Basic and a straightforward, concise and standard Windows human-computer dialogue interface is designed for the system, which makes the operation of the system very convenient.4 ActiveX Automation technology is adopted as the interface with AutoCAD and the hydraulic drawings are edited, modified by AutoCAD until hydraulic model drawings according with the demand of engineering practice are output.5 To resolve practice problem, the author has designed a lower specific speed axial flow runner for Duowa Power Station through an example.

论文的主要内容有：1 深入分析很多轴流定桨式水电站枯水季节小流量下不能发电的主要原因，提出减容改造方案，并指出超常规条件下的改造设计特点。2 结合国情及行业发展需要，参考现有资料、文献和前人的研究成果，进行低比转速轴流式转轮叶片水力设计方法的研究，对轴流式转轮叶片的奇点分布法水力设计进行了全面的探索，结合现代计算机技术，找到了一种针对特殊条件的轴流式转轮叶片水力设计方法。3 仔细比较多种AutoCAD二次开发工具后，结合本课题的特点，选用Visual Basic语言，综合应用软件工程的设计思想，进行低比转速轴流式转轮叶片水力设计软件的编制，为系统设计了直观、简洁和标准的Windows人机对话界面，便于用户操作；编程时在考虑到设计条件特殊性的同时，尽量做到程序的通用性，使之可用于解决同一类问题；另外，大部分程序还可移植到普通轴流式转轮叶片水力设计中，具有良好的适应性。4 利用ActiveX Automation技术与AutoCAD接口，对AutoCAD进行二次开发，在AutoCAD下实现水力图的自动生成和编辑，直至输出符合实际工程要求的木模图。5 通过算例，为多哇水电站设计了一个低比转速轴流定桨式转轮，解决其在枯水期小流量下不能发电的问题。

Firstly, triaxial compression creep tests with mica-quartzose schist which is a kind of soft metamorphic rock with lots of schistosity surfaces were carried out on the rock servo-controlling rheology testing machine under the condition of the axial stress vertical to the direction of the schistosity surface.

首先，对片理发育的软弱变质岩—云母石英片岩，在轴向力与片理垂直的条件下，采用岩石全自动流变伺服仪进行了三轴压缩蠕变试验，对轴向蠕变和径向蠕变进行了对比分析，提出径向蠕变比轴向蠕变敏感，以径向蠕变长期强度作为长期强度更合理。

This paper extends the analysis for axial-system torsional oscillation into the nonlinear domain,and the research for Hopf ramification phenomena in axial-system torsional oscillation has been made using the time-domain simulating results,it verified the analysis results of similar nonlinear differential equation describing the axial-system torsional oscillations.

文中把发电机轴系扭振的分析扩展到非线性领域，并对轴系扭振中的Hopf分歧现象进行了研究，利用时域仿真结果对从描述轴系扭振的近似非线性微分方程分析所得结果进行了验证。

So this part will propose a new method based on the EMTDC to analyze the torsional oscillation problem. Since the EMTDC only has the 7 masses shaft model, use the user Module to develop a detailed shaft model.

由于EMTDC现有的轴系多质量块模型最多只能考虑7个质量块，所以基于模态转换与模态降阶的思想利用EMTDC自定义模块重新开发轴系的多质量块模型，使得能对轴系各截面进行考核分析。

The calculations of torsional vibration of crankshaft systems of 12V240ZJ6E diesel engines were carried out with TVCA programme and I deas software to obtain system natural vibration frequencies, vibration amplitudes of various concentric masses at different rotational speeds, and torques and torsional stress es of various crankshaft sections at different rotational speeds.

运用TVCA程序和Ⅰ deas软件对 12V2 4 0ZJ6E型柴油机轴系的扭转振动进行计算，求出系统的自振频率、各集中质量在不同转速下的振幅和各轴段在不同转速下的扭矩、扭转应力值，对自振频率、自由端振幅和扭转应力最大轴段进行了分析，对轴系的扭转振动情况作出总结与评

According to abraded shafts in the use, this text analyzes abrasion cause of shafts.

针对轴类零件在使用过程中常会出现磨损的情况，对轴类零件的磨损及其原因进行了分析，介绍了近年来轴类零件修复技术的发展，包括喷涂技术、滚花技术、镀覆技术和堆焊技术，并总结了这些修复工艺的特点和应用情况。

The bearing is fixed on the shaft by setscrews in the inner ring, eccentric locking collar or adapter sleeve so that it decreases the precision requirement of the shaft and makes installment and replacement convenient.

带座外球面轴承的内径采用&+&公差，与轴形成间隙配合，通过内圈上一侧的顶丝、偏心套或紧定套，把轴承固定在轴上，降低了对轴的精度要求，安装或更换轴承极为方便。

In the clinical use of the pre-expanded axial-pattern flap, we noticed that partial necrosis of transferred flap might develop following over pre-expansion.

在预扩张轴型皮瓣的临床应用中我们观察到大量预扩张的轴型皮瓣转移后可能出现皮瓣局部坏死的现象，但目前这方面的研究还比较局限，缺少对轴型皮瓣扩张的安全限度的了解和对皮瓣血液循环立体结构影响的观察。

The actual content includes:Ventilates the way the choice,the gross structure plan determination,the axis design and the examination computation,impeller''s design examines and examines the computation,guide vane''s design calculation,sparse class cover,diffuser and current collector design and choice,shell''s des ign,ventilator muffler design,electrical mac你好nery''s choice and fixed way design,components and so on shaft coupling,key and flange shaping examinations.

本次设计的内容是对JBT62轴流式透风机总体方案以及透风机总体结构设计，机械传动部分设计，对轴流风机工作原理，主要工况参数的意义的掌握。具体内容包孕：透风体式格局的选择，总体结构方案的确定，轴的设计以及校核计算，叶轮的设计以及校核计算，导叶的设计计算，疏流罩、扩散器以及集流器的设计以及选择，壳体的设计，透风机消声装置的设计，电机的选择以及固定体式格局的设计，联轴器、键以及法兰等零件的选型校核。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐