矢径

This method is to compare the general motion of a rigid body with the force systems in space and the central axis equation of the force systems in space has been derived beforehand.

本文在此基础上，继续了这一工作，具体地给出了螺旋轴上每一点的矢径及坐标所满足的矢量方程和标量方程，即中心轴方程。

The angular extent in a specified plane which contains all the radius vectors of the polar curve of luminous intensity having lengths greater than a specified fraction of the maximum.

在某一平面上，一定角宽范围内所包含的光强极轴曲线上的矢径长度均大于其最大值的某一特定比例，这种情况定义为光束的发散。

The radius vector of each solid is always a positive length.

每个立体的矢径总是正值长度。

Case-Based Reasoning; ocean eddy ; case representation ; case library ; Radius Vector Serial Based on Barycentre; spatial similarity

案例推理；海洋涡旋；案例表达；历史案例库；重心矢径序列；空间相似性

Methods:Fifty paired embalmed cadaveric humeri (twenty-five pairs:fourteen from male donors and eleven from female donors) were scanned in medial-lateral and anterior-posterior position according to the humeral retroversion by CT. Images of the humeri in the transverse planes at the lowest border of neck,20mm and 40mm distal of LBN(LBN-20、LBN-40), isthmus, head-neck anterior-posteriorwere obtained. Sixty-one extracortical and intracortical parameters were measured exactly by image analytic computer software that included offset, head position, head-shaft angle, head to tuberosity height, head thickness, curvature radius, articular surface arc, neck diameter, isthmus position, proximal and distal border of isthmus, maximum coronal and sagittal diameter of medullary canal and thickness of cortical bone in four planes, including LBN, LBN-20,LBN-40 and isthmus.

50根成对防腐肱骨(男14对，女11对)按肱骨头扭转角置于冠状位和矢状位，行肱骨全长，头颈矢状面，解剖颈下缘及其下20mm、40mm，髓腔狭窄部四平面CT扫描，由CT软件测量冠、矢状位髓腔内外参数共61项，包括头心—干轴距，头位置，头干角，头—结节高度差，头厚度，头半径，关节面张角，解剖颈直径，髓腔狭窄部位置，解剖颈下缘及其下20mm、40mm和狭窄部四个平面髓腔的最大冠、矢状径，皮质骨厚度等。

Methods A prospective study of 48 patients with thoracolumbar junction burst fracture (T12-L2), 15 with and 33 without neurologic deficit were included. Computed tomographic scans were used to measure the sagittal and transverse diameters and the surface area of the spinal canal at the level of injury, as well as one level above and another level below the fracture level. Injury severity scores were calculated for both groups.

前瞻性研究48例胸腰椎(T12-L2)爆裂性骨折的患者，15例有脊神经功能障碍，33例无脊神经功能障碍，用CT扫描来测量损伤水平及损伤水平上下节段椎管的矢径、横径和椎管的表面积，两组病人都用ISS评分作损伤程度评估。

Methods:Three-dimensional(3D) CT imaging reconstruction was performed in 200case of cervical spine without radicular symptom and injury.C_3-C_7 vertebral body horizontal diameter, sagittal diameter,high.vertebral gap.pedicle vertical diameter and horizontal diameter,coronary high,base long of vertebral uncus,space between vertebral uncus point.highness and width of intervertebral foramenand,transverse foramen,The CT data was transferred to a computer workstation,grouping with age and sex,statistical analysis.

材料与方法：选取200名不同年龄段无外伤、无神经症状和体征的受检者，进行多排螺旋CT薄层扫描，在计算机工作站上对获得图像进行多平面重建，获得相应截面图后，测量各相关指标，包括第3至第7颈椎(C_3-C_7)椎体横径、矢状径及高，椎体间隙，椎弓根的高与宽，冠状位钩突高度、钩突基底宽度、基底长、两侧钩突尖间距及基底长径角度，椎间孔高和宽，横突孔长和宽。按性别、年龄分组进行统计学分析。

Methods 43 cases of lumbar stenosis undergone domelike decompression were performed L(subscript 3~4) and L(subscript 4~5) CT scanning pre-and postoperatively.

对弯顶形椎管扩大成形术治疗的43例腰椎管狭窄症患者手术前后进行CT扫描，用Image-Pro软件对CT扫描片进行椎管L(下标 3~4)、L(下标 4~5)的椎管矢径、上关节突内缘间距、椎板间距、截面积测量分析。

Domelike decompression can increase APDC, IFD, ELD and CSAC significantly, especially for CSAC, which is an effective way for lumbar stenosis.

弯顶形椎管扩大成形术可明显扩大腰椎管的矢径、上关节突内缘间距、椎板间距和椎管截面积，尤其是椎管截面积扩大更为明显，是一种治疗腰椎管狭窄症有效的方法。

Results:48 patients had varying degrees of symptoms of spinal cord compression;The canal is less than 11mm diameter arrow.

结果：48例均有不同程度的脊髓压迫症状；椎管的矢径均1mm。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。