对轴

:at any point of elastic object ,the rotating value of z axis is :ν u θz = substitute get:ν= u = y x θz = 0 x y into the formula , we can Similarly:θx = 0 θy = 0 So the rotating values of the three coordinates at any point of the elastic object are zero.

：在弹性体的任一点处，该点对z 轴的旋转量ν u θz = x y u =ν=将代入，可得： y x θz = 0 同理θx = 0 θy = 0 即弹性体的任一点对三个坐标的旋转量都等于零。

This paper researched the key part of framework aclinic slide structure on diamond frame sawing machine, which is the axially moving hydrostatic journal bearing. The major sawing motion form of diamond frame sawing was analysed. The structure designing model of the bearing according to the practice was established; and by the systemic analysis and research on the lubricating mechanism and performance, the designed scheme was proved out.

本文通过对金刚石框架锯主要锯切运动形式分析，以金刚石框架锯锯框水平滑动机构关键件－轴向运动液体静压轴承为研究对象，结合实际建立了该轴承的结构设计模型，通过润滑机理与性能的系统分析研究，实现了对设计方案的有效验证，并满足实用要求。

Objective to evaluate the functional recovery of acute spinal cord injuried rats treated with exogenous wnt-3a signal protein administration and to explore its mechanism.methods moderate spinal cord contusion injury was made in 40 adult sprague dawley rats at t10.twenty rats served as contusion controls(group 1).twenty rats were treated with wnt-3a for three days after injury (group 2).the functional recovery of the rats was observed through basso,beattie,bresnahan open field locomotor score.rats were killed at 14 or 28 days after injury,then spinal cords were removed for histopathological examinations,and the expression of the bromodeoxyuridine plus neural cell markers was stained with immunohistochemical method.results rats of two groups receiving a contusive injury recovered substantial function within 1 week.by 28 days,rats in groups 2 scored 7.0 points better on the bbb scores than rats in group 1 group 2=16.94,after 28 days vs.

目的 研究外源性wnt-3a信号蛋白对脊髓损伤的修复作用，并探讨其作用机制。方法取40只成年雌性sd大鼠在t10节段制备适度脊髓挫伤模型。随机从中取20只为损伤对照组(group 1)，另外20只为损伤治疗组(group 2)。脊髓损伤3天后用wnt-3a蛋白治疗。这些大鼠的功能恢复通过basso、beattie、bresnahan开放视野运动评分来观察。这些大鼠分批在损伤后14天或28天被处死，取出损伤节段脊髓用来组织病理学检查，同时用5-溴脱氧尿嘧啶核苷和神经细胞标记物进行免疫组化染色。结果两组大鼠在伤后一周运动功能有明显的恢复。不过，到损伤后28天，我们观察发现，损伤治疗组中的大鼠bbb评分比损伤对照组中的评分高出7.0分左右(group 2∶16.94±1.18，group 1∶9.89±1.29；p.05)，光镜和电镜检查发现wnt-3a蛋白对髓鞘形成和轴突再生有一定的修复效果。

The whole brain of the subject was axially and coronally scanned in the normal stereotactic space with a slice 1mm thick by MR system. The caudate nucleus were identified, segmented, extracted, saved and three-dimensionally reconstructed on MRI by software system developed by Research Center of Biology, Harbin University of Technology.

在以AC-PC线为基准线的标准脑立体定向空间对志愿者做1mm层厚，间距0mm的MR轴位和冠状的脑扫描，利用哈尔滨工业大学生物研究中心研究开发的软件系统对经MRI扫描后转存的尾状核图像进行三维重建，软件提取分割的尾状核轮廓后执行重建命令。

Methods Nineteen bone impacted and unerupted teeth in 18 cases selected by orthopantomograph were scanned by 3DX-CT with 1.0 mm slice thickness. Images obtained by 3DX-CT (horizontally, sagittally, coronally) were analyzed after multi-plane reconstruction and 3D reconstruction including the angle of the bone axis impacted and unerupted teeth; maximum radius of the coronal teeth; distances between the tooth and the cortical bone around; distances to the neighboring tooth roots and nerve forum canal; the thickness of the bone tissue, etc.

对经曲面断层片筛选出的18例19枚埋伏牙进行牙科三维CT检查，扫描层厚1.0mm，重建后进行图像三维断面显示（包括水平位，矢状位，冠状位），对牙位图像进行分析及测量（包括埋伏牙牙长轴的角度，牙根弯曲度，牙冠的最大径，与骨皮质的距离，与邻牙根、神经孔／管的距离；骨质的厚度、高度等）。

In the first, the length of every poleof the leading four-bar mechanism are determined bypainting,secondly, the base of mechanic model ofsupport-surrounding, the mechanism and loads on the support isdecided. The next work, with the condition of the design, the mainmechanics of hydraulic support is analyzed and calculated by planeand spatial model. Finally, the under frame, top beam cave shield,wrists and hydraulic column are analyzed by calculation. And drawout all the process drawings.

首先，通过作图确定支架的四连杆机构各杆系的长度；然后，以力学模型为依据，分析了液压支架的顶梁、掩护梁上载荷的作用机理，得到了较为合理的支架载荷的计算公式；其次，结合设计的支架，从平面和空间两方面对支架主要结构件进行受力分析；最后对支架主要结构件、连接销轴进行强度效核，并画出所有的机械图。

The elastica deforms after it is subject to an external pushing force on the moving clamp. It is observed that when the pushing force reaches a critical value, snapping may occur as the elastica jumps from one configuration to another remotely away from the original one. Moreover, in order to transfer motion or force by this structure, we will make a research into the relation between longitudinal forces of the two ends.

在对滑动夹持端施以推力后，弹性板条会产生变形，我们观察到当推力达到临界值便会发生折断式挫曲的现象，由原先的变形跳至另一稳定的变形；此外，希望以此结构传递运动或力量，故将对两端的轴向力关系加以研究。

Methods Twenty-three cases of OSAS patients proved by polysomnography were examined with MRI. The cross-sectional area of retropalatal region, retroglossal region, epiglottal region and the lateral parapharyngeal fat pad of RP region was calculated. The thickness of bilateral and posterior pharyngeal wall and other indices were also measured. 30 nonsnoring age-matched normal subjects were selected as the control group. 15 patients underwent turbo field echo T1-weighted imaging during sleep. The images of RP, RG, and EPG were analyzed. Results In oSAS group, the cross sectional area of RP and RG regions was smaller than that of the control group.

应用MRI对23例经多导睡眠监测（polysomnography， pSG）确诊的OSAS患者及30例无打鼾的健康成人进行上气道检查，于轴面图像测量软腭后区（retropalatal region， RP区）、舌根后区（retroglossal region， RG区）和会厌区（epiglottal region， EPG区）的气道截面积，各区前后、左右径及其比值，各区咽侧壁、咽后壁软组织厚度，RP区咽旁间隙（lateral parapharyngeal fat pad，LPFP）截面积，于正中矢状面图像测量软腭厚度、长度及截面积，对两组各项检查指标进行统计学分析。

The intensity of pressure is the most markable factor that influence the casts mechanical properties and microstructure. When its value exceeds 40MPa, the disfigurement such as shrinkage porosity can be effectively reduced . when its value exceeds 120MPa, the pressure obviously influence the crystal performances of liquid metal also, and compact homogeneous exiguous equiaxial crystal can be obtained. Pressure can also increase the solubility of Cu in a -Al.

比压是对铸件力学性能和显微组织最为显著的因素，其取值超过40MPa时，能有效减少缩松等缺陷，当比压超过120MPa时，除了能减轻铸造缺陷外，还对液态金属的结晶性能产生显著影响，在铸件断面上得到致密、细小且均匀的等轴晶。

It introduces mathematic demonstration about the reason of heterogenic image motion vector,analyzes the necessity of drift mechanism and puts forward a compensation method by using scan mirror,drift mechanism and exposure slit.

对产生异速像移实质给出了数学推导，对偏流机构存在的必要性进行了分析，提出了一种利用两轴旋转扫描镜，同时结合旋转偏流机构和曝光帘缝的像移补偿方案。

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。