v-vc 中文意思是什麼
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This paper studies the band percolation of the models of the triangle lattice and the hexagonal lattice. before we study the models of the triangle lattice and the hexagonal lattice, we will introduce period. let g = ( vc, ec ) be a connected graph, we write vg for the set of vertices of g and egfor the set of its edges, u e vc is a vertex, and v is the coordinate vector
在介紹平面正三角形和正六邊形點格的邊滲流模型之前我們先引入周期的概念：設g = （ v _ g ， e _ g ）為連通圖其中v _ g ， e _ g分別為圖g的頂點集和邊集， u v _ g為的頂點， v為平面的坐標向量。 -
The vc - fe surface composite shows high wear - resistance, it ' s wear - resistance is 4. 20 times as that of chilling respectively. with the content of v increasing, it ' s rigidity and wear - resistance increases continually. more vc grains gained, and well distributed, better wear - resistance the vc - fe surface composite will show. ( 7 ) surface cermet composite was formed by the means of cast - sintering technique, with the help of adding wc grains and the quantity of heat sent out from the reaction v + c vc, the carbide cermet quality percent exceeds 60 %
在重載干滑動摩擦條件下， vc一fe表面復合材料顯示了很高的耐磨性，其相對耐磨性是可淬硬鑄鐵的4 . 2倍:隨著含v量的增加， vc一fe表面復合材料的鑄態硬度和耐磨性不斷提高， vc顆粒越多，分佈越均勻，表面復合材料的耐磨性就愈好。 -
2 ) through many numeral experiment, using the crack face ' s slant angle and azimuth angle as parameters, we found some relations between three - dimension fractal parameters and two - dimension fractal parameters in rock mass : ds = ( 1. 0 + 0. 031 ) * dl + ( 1. 0 + 0. 0395 ), ns = nl, v = 1. 5986 * ( 2 - dl ) - 3. 2935 * sin ( st ) + 3. 8263, and found a way to speculate three - dimension fractal parameters from two - dimension fractal parameters. lt is the foundation to describe the distribution laws of crack face in rock mass by the observing results through rock mass section crack, 3 ) this paper constructed the three - dimensional fractal emulation theoretical system and erected three - dimensional fractal emulation model about crack face in rock mass 4 ) a emulation system about crack face in rock mass is developed by vc + +, it includes the function to get section plane chart and section block chart from three - dimensional network chart automatically, and some of the emulation examples is given
2 ）通過大量數值試驗，以巖體裂縫面的傾角與方位角為紐帶，分析得出了巖體裂縫面數量三維分形分佈參數和巖體裂縫跡線二維分形分佈參數的關系： d _ s = （ 1 . 0 0 . 031 ） * d _ l + 1 . 0 0 . 0395 ， n _ s = * n _ 1 ， = 1 . 5986 * （ 2 - d _ l ） - 3 . 2935 * sin （ st ） + 3 . 8263並提出了由二維分形幾何參數來推導三維分形幾何參數的方法。為通過巖體剖面裂縫直接觀測結果，描述巖體裂縫面分佈規律奠定了基礎。 3 ）本文構建了巖體裂縫面的三維模擬理論體系，建立了巖太原理二大學周眨d二研究生學位論文體裂縫面的三維分形模擬模型。
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