Shadow effect can not be neglected for thermal analysis of spacecraft,Accroding to the angle between solar light and antenna orbit plane and its orbit location,analytical geometry method was used for accurately calculating solar radiation heat flux distribution of reflector surfaces.To analyze the temperature field under heat flux,the formulations of net radiation flux density between two gray elements and the net flux density of gray surface under external thermal flux were deduced.Based on the characteristic of space environment,the nonlinear temperature distribution in transverse direction of reflector shell self radiation were considered,the finite element formulations were given for orthogonal material layered shell by Galerkin method.A layered element including a inner heat source layer was proposed,and the finite element formulation expressed by DOF of the inner heat source layer were put forward with temperature and heat flux boundarys between adjacent layer.

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Geometry a curve generated by the intersection of a plane and a circular cone.

一個(gè)平面和一個(gè)圓錐體相交而生成的曲線。

Geometry the area created by a plane cutting through a solid.

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It is important to set up perfect datum plane in engineering measurement as well as geometry parameters′ shape and positional error inspection.

基準(zhǔn)平面的確立，是進(jìn)行表面參數(shù)評(píng)定的基礎(chǔ)AV网站在线观看不卡无码；建立理想的基準(zhǔn)平面aaa日欧美女，在幾何量形位公差檢測(cè)及相關(guān)工程測(cè)量方面具有重要作用。

Snap lines can be assigned to a view, a datum plane or any geometry edge and then move with that view.

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It is started with the Desargues theorems and dual theorems' formulation and proof of the elementary geometry, guaranteed the scientific of the method on the theoretical plane .

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The infinite elliptic cone geometry can be transformed into the two-dimensional plane under the assumption of pure TEM spherical waves. The closed-form solutions for the characteristic parameters are obtained.

應(yīng)用坐標(biāo)變換和共形變換研究橢圓雙錐天線国产qv，在傳輸純TEM波的假設(shè)下，把無限長(zhǎng)橢圓雙錐結(jié)構(gòu)變換為二維平面結(jié)構(gòu)人人人做人人爽欧美人，從而得到橢圓雙錐天線輸入阻抗閉合解碰人人么，其典型結(jié)果與文獻(xiàn)一致。

Study on geometry theory and engagement characteristics of scroll profiles Aiming as the limitations of scroll profiles in existence, the whole characteristics and local characteristics of plane curve instinct equation were studied. Analyzed the equidistant curve of envelope principle, normal equidistant curve creating method and envelope equidistant curve creating method were gained.

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Various methods such as the relationship of area, and the distance of the triangle to the centralness of three dots, the distance from the interior point, exterior point, the barycenter to the vertices of triangle, and the standard error and differences average obtained from three dots were determined with a dynamic geometry software GSP, and a statistic method was used to find a least error way to determine the centralness of three dots on a plane.

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Also so, does the paper obtain from the information technology and the plane analytic geometry teaching conformity, studies how fully displays various mathematics software (mainly is "The Geometer"s Sketchpad, Excel, Mathematica software) the function.

也正如此，論文從信息技術(shù)與平面解析幾何教學(xué)的整合入手911视频黄色，研究怎樣充分發(fā)揮各數(shù)學(xué)軟件(主要是《幾何畫板》激情五月丁香婷婷、Excel、Mathematica軟件)功能国產特黃特粗又長A片。