雨棚按水平投影面积的一半计算；
谷壳投影面积主要由谷壳宽度所决定。
在单位半径的球体中心对球表面上的投影面积所张的角。
The Angle subtended at the center of a sphere by an area on its surface numerically equal to the square of the radius.
林木冠幅(平均投影面积)对近林带处小麦的产量影响较大。
Among the influent factors, the projection area of tree crown has a great affect on wheat output.
决定负力矩大小的主要因素是齿槽接触线两侧的投影面积之差。
The primary factor determining this torque is the area difference between the front and back groove surfaces devided by the meshing line.
然后根据估算的投影面积，可以进一步近似测量光强和失能眩光的值。
Then based on the estimated projected area, we may further the approximate survey luminous intensity and the value of disable glare.
利用模型计算了主充气阶段伞衣形状变化、伞衣投影面积变化及伞绳张力。
The model was used to calculate the variations of the canopy shape, the variations of canopy projection area and the tension of the suspension line during the final inflation phase.
在进行飞机易损性分析时，需要计算飞机及各部件在垂直于来袭方向的投影面积。
In aircraft vulnerability analysis, it is necessary to calculate the projection areas of the aircraft and its critical components facing against the attacked direction.
由画法几何原理可知平面面积等于其正投影面积乘以该平面与投影面夹角的余弦。
According to principle of descriptive geometry, the area of plane equals projection of the plane divided by cosine between plane and projection of plane.
最后利用模型计算了初始充气阶段伞衣形状变化、伞衣投影面积变化及伞绳张力。
Finally, the model is used to calculate the variations of canopy shape, the variations of canopy projection area and the tension of suspension lines during initial inflation phase.
据此，对空间结构外热流的求解问题将转化为空间结构有效投影面积的求解问题。
Based on this theory, the problem how to calculate heat flux can be transformed into that to find effective radiation area of space structure.
本研究应用图像分析仪，测定了50付髋骨与骶骨骶髂关节面的纵径、横径和投影面积。
The diameters and projection area of the articular surfaces, contributed to the formation of the sacroiliac joint, were determined on 50 sets of pelvic bones with image analysing apparatus.
基于病程中红细胞测量的影象投影面积、周长和波形因数，使用形状描述符进行形状分析。
The shape analysis is carried out by shape descriptors based on projected area, perimeter and form factor, as measured by processing of images of erythrocytes.
高大树木及人工遮阳构筑物累计夏至日正午投影面积占广场总面积不宜低于2 5 % ；
The accumulative shaded area cast by the tall trees and shading structure should not be less than 15% of the total area of the square;
大倾角和相对小的正面投影面积的炮塔，加上较高的车体使其能充分利用地图中的各种掩体。
It's turret is well sloped and is quite small, as well as being tall enough to use many obstacles to go hull down.
汽车迎风面积是指汽车在行驶方向的投影面积，汽车迎风面积是求汽车空气阻力系数的必需参数。
Automotive frontal area is projected area of automobile driving direction, which is necessary parameter of measuring automotive air drag coefficient.
共有建筑面积还包括套与公共建筑之间的分隔墙，以及外墙（包括山墙）水平投影面积一半的建筑面积。
Mutual floor area still includes to cover with the midfeather between public construction , and outside wall ( include frontispiece ) the level is umbriferous the floor area of area half.
在此基础上，根据集合论中的包含互斥理论，提出了一种求取多个复杂几何形体在任意方向的投影面积的新算法。
Based on inclusion exclusion principle of set theory, a new algorithm to calculate the whole projective area was put forward to those overlapped complex geometrical objects in any direction.
并应用了颗粒形态学及分形理论，检测颗粒的相关形态参数：颗粒的投影面积、周长、粒径、形状因子、以及分形维数。
The micro-images of particle morphologic and fractal are applied to process of image processing. Morphologic parameters have been brought forward: area, girth, diameter, shape factor, and fractal.
通过试验发现就环状橡胶圈（模拟废旧轮胎）这种柔性加糙体，垂直水流方向的投影面积是影响槽底糙率、水深和流速的主要因素。
By the testing we found the flexible artificial roughness rubber turns which simulated the wasted tires were the main factor which affect the roughness of the bottom which directed to vertical flow.
通过试验发现就环状橡胶圈（模拟废旧轮胎）这种柔性加糙体，垂直水流方向的投影面积是影响槽底糙率、水深和流速的主要因素。
By the testing we found the flexible artificial roughness rubber turns which simulated the wasted tires were the main factor which affect the roughness of the bottom which directed to vertical flow.
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