三面角

词组短语

trihedral angle

与三面角相关的网络例句 [注：此内容来源于网络，仅供参考]

SBR can be successfully used in the analysis of trihedral corner reflectors, the improved arithmetic enhances the speed of calculation greatly.

结论将射线跟踪法应用于三面角反射器的后向散射场的研究中；改进后的算法不但计算准确而且运算速度也有所提高

The merit of the invention are: 1 adopting free curved surface imaging method , three part reflection type Zernike polynomial free curved surface forms short focal distance bigger, relative apertures bigger fields of view angle imaging , rectifying optical aberration much better and its structure is simple; 2 adopting the reflection structure without optical lens, has removed the effect of various chromatic aberration , guarantee the imaging articulation; 3 adopt the design of short focal distance big fields of view angle, focal distance 8 - 15 mm, field of view angles 100 -135 degree, having 120 times multiplications under 250 mm imaging distance, having ultra-thin characteristic property; 4 adopting big relative apertures design ,the relative aperture is 2.0-2.4, having improved the illuminance of flat surface; 5 adopting image space telecentric imaging method , ensures that the image surface irradiance is homogeneous.

本发明的优点是：1采用自由曲面成像方法，三片反射式Zernike多项式自由曲面形成短焦距大相对孔径大视场角成像，更好地校正像差，结构简单；2采用无透镜形式的反射式结构，消除了各种色差影响，保证成像清晰度；3采用短焦距大视场角设计，焦距8～15mm，具有100～135度的视场角，在250mm成像距离下有120倍的放大倍数，具有超薄特性；4采用大相对孔径设计，相对孔径为2.0～2.4，提高像平面上的光照度；5采用像方远心成像方法，保证像面辐照度均匀。

The transepicondylar axis of different position has no effect on volume rendering technique measuring the humeral head retroversion angle with multi slice spiral CT.The top view at which lateral epicondyle of the humerus showing minitriangulum and the anterior surface of the distal humerus articulation with the forearm being shaded is more simple,faster and precise for the volume rendering technique measuring the humeral head retroversion angle with multi slice spiral CT.

结论］肱骨头扭转角变异较大，肩关节假体扭转角设计应个性化；肱骨远端不同位置内外上髁轴线对多层螺旋CT容积再现测量肱骨头扭转角没有影响；俯视位观察肱骨，当外上髁露出呈小三角形、肱骨远端前关节面被肱骨头遮盖重叠的位置是多层螺旋CT三维重建测量肱骨头扭转角的更简单、更快捷而且准确的测量位置。

A terrains sloe and direction may be computed relative to a plane though the elevation model points. Slope degrees and direction are useful in simulations of precipitation runoff and in defining drainage areas . The triangle terrain model, which comprises sloping triangular surface, is ideal for simulating terrain surface conditions .

坡面和坡面方向是可以藉由三角形的三个角的座标来计算出来，坡度通常是用度数或者百分比的关系来表达和水平之间的关系，坡度方向度数的表示几乎是从北边开始。

Methods The method of shooting and bouncing rays was used to calculate the RCS and stokes' theorem was used to improve the arithmetic.

方法利用射线跟踪法对电大尺寸的三面角反射器的后向散射场进行分析，并利用斯托克斯定理将射线跟踪法中的面积分简化为代数多项式。

Of course, its location is an enormous help, sitting as it does on a promontory with water on three sides and the famous Sydney Harbour Bridge as a picture-postcard backdrop.

当然，这座建筑有着得天独厚的地理位置：它高踞一个呷角，三面环水，背景是著名的悉尼港大桥。

Aim To calculate the RCS of trihedral corner reflectors and improve the typical arithmetic of SBR.

目的研究三面角反射器后向散射场问题，并对射线跟踪法的典型算法进行改进，以提高运算速度。

This paper focuses on the effects of machining tolerance on monostatic RCS of triangular trihedral corner reflector s by using Physical Optics method.

基于物理光学法研究了三角形三面角反射器加工公差对其单站雷达散射截面的影响。

Trihedral corner reflectors ; shooting and bouncing ray ; radar cross section

三面角反射器；射线跟踪法；雷达散射截面积

Result: Scoliosis was identified in 58 cases with Marfan syndrome (38 males and 20 females), the prevalence rate was 42.03%, male-female sex ratio was 1.18:1, 6 cases were in younger than 10-year-old group. 12 cases were in 11~20-year-old group, 19 cases were in 21~30-year-old group, 11 cases were in 31~40-year-old group, 7 cases were in 41~50-year-old group, 3 cases were in 51~60-year-old group. Mean magnitude of Cobb angle in coronal plane was 26.8°±27.8°, the types of scoliosis curve included thoracic curve (36 cases), thoracolumbar curve (11 cases), lumbar curve (2 cases), double curve (6 cases) and triple curve (3 cases), apex vertebraes were convex to the right side among single curves in 38 cases while 11 cases were convex to the left side. Mean magnitude of kyphosis in sagittal plane was 14.3°±13.2°, 5 patients had thoracic lordosis and 40 patients had hypokyphosis and 12 patients had normal kyphosis.

结果：58例(42.03%)患者合并脊柱侧凸，男38例，女20例，男女患病率比例为1.18：1，其中≤10岁6例，11~20岁12例，21~30岁19例，31~40岁11例，41~50岁7例，51~60岁3例；平均冠状面Cobb角为26.8°±27.8°；胸弯36例，胸腰弯11例，腰弯2例，双弯6例，三弯3例；单弯中顶椎凸向右侧38例，凸向左侧11例；矢状面胸椎后凸平均为14.3°±13.2°，其中胸椎前凸5例，胸椎后凸不足40例，胸椎正常后凸12例，仅1例胸椎后凸45°；11例患者冠状面Cobb角＞40°，平均年龄15.9岁。

与三面角相关的网络解释 [注：此内容来源于网络，仅供参考]

symmetric triple diagonal matrix：对称三对角方阵

11903,"symmetric trihedral angle","对称三面角" | 11904,"symmetric triple diagonal matrix","对称三对角方阵" | 11905,"symmetric; symmetrical","对称的"

trihedral angle：三面角

trigonometrical survey 三角测量 | trihedral angle 三面角 | trihedron 三面形

trihedral angle WESTBANK：三面角

trigonometrical survey WESTBANK 三角测量 | trihedral angle WESTBANK 三面角 | trihedron WESTBANK 三面形

symmetric trihedral angle：对称三面角

11902,"symmetric transformation","对称变换" | 11903,"symmetric trihedral angle","对称三面角" | 11904,"symmetric triple diagonal matrix","对称三对角方阵"

trihedral：三面形的

trigonometry 三角学 | trihedral 三面形的 | trihedral angle 三面角

trihedron：三面形

trihedral angle 三面角 | trihedron 三面形 | trillnear coordinates 三线坐标

trihedron WESTBANK：三面形

trihedral angle WESTBANK 三面角 | trihedron WESTBANK 三面形 | trillnear coordinates WESTBANK 三线坐标

trisecant：三度割线;三重割线

三直角三面形 trirectangular trihedral | 三度割线;三重割线 trisecant | 三等分角 trisection of an angle

trigonometrical survey：三角测量

trigonometrical station 三角测量测站 | trigonometrical survey 三角测量 | trihedral angle 三面角

tripolar coordinates：三极坐标

三面角 tripod | 三极坐标 tripolar coordinates | 三直角四边形 trirectangular quadrilateral