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平面测量的
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  plane surveying
     The determination of plane surveying error and the calculating method of wire survey grade and accuracy at Gequan Coal Mine are discussed in the thesis.
     利用公式计算法确定井下平面测量的误差 ,以及控制采区导线测量的等级与精度的计算方法
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  “平面测量的”译为未确定词的双语例句
     Another important technique in image measurement is extracting feature information from featured object in image plane. This technique is related to the precision and speed of plane measurement.
     平面测量的另一个重要环节是提取平面图象中特征标志物上的特征信息,它关系到整个平面测量的准确性和速度。
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     1. Developed from the theory of projective geometry, this paper made a detailed research on the basic theory of the image-based plane measurement technique.
     1.从射影几何理论出发,论文详细研究了基于图像的平面测量的基本原理。
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  相似匹配句对
     Exploration for the Horizontal Control Survey in High Speed Railway
     高速铁路平面控制测量的探讨
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     Diagnostic Technology of Planar Near - Field Measurement
     平面近场测量的“诊断”技术
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     Bookshop
     平面书店
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     Testing requirement
     测量的要求
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     From Plan to Section
     从平面到剖面
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  plane surveying
Basic concepts of elementary plane surveying for use in natural resource assessment.
      
Course includes the fundamentals of plane surveying and the use of surveying instruments.
      


A generalized projection-slice theorem is derived for reflection fan beam diffraction tomography within the Born or Rytov approximation which requires that the object being probed subtend a small angle relative to the measurement plane. Within this approximation, it is proved that the reflected ficld measured over the plane in which source point is located determines the three dimensional spatial Fourier transform of the object profile over the surface of an ellipsoid of revolution in Fourier space.

本文导出了反射模扇形束入射衍射CT的广义断层投影理论,它的前提条件是Born或Rytov近似,且要求物体相对于测量平面的张角很小,在这种近似下,可以证明与点源处于同一平面的测量面上测到的反射场决定了物体断面参数在一旋转椭球面上的频谱值。

One hundred Chinese adult humeral heads (50 of either side) were studied with laser. The radius, height, angle as well as the surface area of each were anteriorly, laterally and obliquely measured in two-dimensions.The main results are as follows:1) The mean angle of the articular area was 144.48±11.9°.2) The average radius and height of the humeral head were 2.15±0.16 cm and 1.56±0.24 cm respectively. The articular surface height occupied 36.05 per cent of the diameter of the approximate spherical body.3) The...

One hundred Chinese adult humeral heads (50 of either side) were studied with laser. The radius, height, angle as well as the surface area of each were anteriorly, laterally and obliquely measured in two-dimensions.The main results are as follows:1) The mean angle of the articular area was 144.48±11.9°.2) The average radius and height of the humeral head were 2.15±0.16 cm and 1.56±0.24 cm respectively. The articular surface height occupied 36.05 per cent of the diameter of the approximate spherical body.3) The mean articular surface area of the humeral head was 21.02±4.03cm~2. According to the radius of the humeral head and the articular surface angle, the curvature of the articular surface can be estimated and drawn out. That will offer the theoretical data of Chinese adult humeral head for the design and manufacture of artificial joint and artificial humeral head.

本文报道用激光对100例成人肱骨头进行两维平面测量,即正位、侧位、左、右45°斜位肱骨头的半径、关节面高度、张角及表面面积等。其结果为:1.肱骨头关节面的张角平均为144.48±11.93°。2.肱骨头半径及高度分别为2.15±0.16 cm、1.56±0.24 cm。肱骨头关节面高度占近似球体直径的36.05%。3.肱骨头关节面的表面积为21.02±4.03 cm~2。4.激光测量比接触测量客观、准确,可以重复并易取得统一标准,为骨胳测量提供一种较好方法。根据所测肱骨头半径与关节面张角,即能绘出肱骨头关节面的图形,计算出关节面曲率。本文对设计、制造肱骨头提供了国人数据,也可为肱骨头生物力学的研究提供参考。

The stereoscopic foreign body locator designed by the authers consists of a transparent plastic box, a central rotator and an indicating pointor.Based on the X-ray film calculation, one can easily find thelocation of foreign body in the vitreous cavity, as well as its relative position to the limbus and to the wall of eyeball. The accuracy of this stereoscopic foreign-body locator depends much on the precise calculation of the x-ray film.Patient's eyeball with variation of axial length should be mathmatically...

The stereoscopic foreign body locator designed by the authers consists of a transparent plastic box, a central rotator and an indicating pointor.Based on the X-ray film calculation, one can easily find thelocation of foreign body in the vitreous cavity, as well as its relative position to the limbus and to the wall of eyeball. The accuracy of this stereoscopic foreign-body locator depends much on the precise calculation of the x-ray film.Patient's eyeball with variation of axial length should be mathmatically corrected.

本立体定位器由透明盒壁、中心旋转器和指示针组成。通过X线异物定位片的平面测量,直接形象地显示出异物在空间位置、与球壁关系及距角膜缘的距离。 本立体定位器所依赖的平面测量数据必须精确,眼球轴长变化应进行折算。

 
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