By constructing a sphere hexagonal grid system based on the Truncated Icosahedrons Projection, this paper focuses on the study of the address coding mechanism of the sphere hexagonal grids, including the hierarchy coding schemes, the study of the positional relations among the grid units and the mutual conversion between the address codes of the grid units and the geographical coordinates.

本文通過構(gòu)建基于截頂正二十面體投影的球面六邊形網(wǎng)格系統(tǒng)亚洲最新永久免费视频，對球面六邊形網(wǎng)格的地址編碼機制進行了重點研究免费郑州性感美女黄色网站，包括網(wǎng)格的層次編碼方案全网免费观看黄色片、網(wǎng)格單元位置關(guān)系研究和網(wǎng)格單元地址碼與地理坐標之間的相互轉(zhuǎn)換进入日韩黄色网站。

In thisthesis, we first extend the vanishing theorem due to Lawson, Simons and Xinto the case of compact submanifolds of a hyperbolic space. Thus, by using thenew vanishing theorem for homology groups, we prove the topological spheretheorem for complete submanifolds in a hyperbolic space. Hence we generalizethe Shiohama-Xu topological sphere theorem.

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Among the three concave reflecting surfaces, namely, a spherical cap, a paraboloid and a hyperboloid of revolution, the enhancement degree of FM for a spherical reflector is the largest.

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Under these coordinate systems, the algorithms that translate hexagonal grid cells from an unfolded icosahedron to a sphere were put forward.

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In order to generate spherical equal-area grid,this paper finds the corresponding relationships between unfolded icosahedron and sphere using Snyder equal-area projection.

文中利用Snyder等積多面體投影建立了平面與球面的對應(yīng)關(guān)系，設(shè)計了球面等積三角形和四邊形離散網(wǎng)格的生成算法欧美Ⅴa。

On the basis of on the analysis of current spherical spatial data structure, the clew of the spherical spatial basal subdivision mode which uses Snyder equal area projection on the truncated icosahedron DGG is discussed, and then global multi-resolution overlay is obtained by subdividing hierarchically on the initial projection plane according to the hexagonal grid.

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Such a problem need us to know whether an onto isometry between the unit spheres of Banach spaces has an linear extension to the whole space?

它是問定義在兩個Banach空間單位球面到單位球面上的等距算子是否可以線性等距延拓到整個空間上？

Based on the traits of the aspherical lens, the sunlight was focused on a very small spot, and then it was transferred into a plastic fiber by an aspherical lens and a selfoc lens. A formula for calculating the optimal length of selfoc lens is presented. The optimal assembly of the aspherical lens and selfoc lens was implemented by the aid of this formula. Therefore, sunlight is coupled into a plastic fiber efficiently.

根據(jù)非球面透鏡垂軸球差小的特點把太陽光會聚到很小的光點美女奶头无遮挡网站视频免费观看，再利用長度約為1/4節(jié)距的自聚焦透鏡改變光線的數(shù)值孔徑使其滿足光纖的數(shù)值孔徑欧美熟妇被草，通過一個計算公式來計算最佳的自聚焦透鏡長度，實現(xiàn)非球面透鏡和自聚焦透鏡的最佳組合亚洲欧美黑人性暴力猛交群，把太陽光以較高的耦合效率耦合進塑料光纖。

Instead, he suggested it was an oblate spheroid—a sphere that is squashed at its poles and swollen at the equator.

相反黄色不良网站十八岁以下禁止入内，他提出地球是一個扁球面——兩極稍扁国产精品美女视频一区二区、中間略鼓的扁球面。

We take the spherical harmonic functions as base functions on the spherical surface and other systems of orthogonal functions as base functions in the direction of radius. However.

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