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1 IntroductionIn [2] tl1e authors considered a type of coustrained maximim capacity path problem whichcan be described briefly as: kuowing the costs for expallding one unit of capacity along differentedge8 of a l1etwork aud the availabIe budget, how to iucrease the caparities of the edges so thattlle capasity between any pair of nodes in the lletwork can be raised unifornily to the maximumextent? As the total cost is a summation of the expansion costs on all edges, this problem i8related to mi… 相似文献
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ZHANG Tie-hua ZHENG Jian YE Hai-qing YU Ya-li ZHAO Ping LIU Jing-bo College of Light Industry Economics & Management Jilin University Changchun P. R. China 《高等学校化学研究》2011,(3)
Antibacterial peptides mixture purified from Ovotransferrin by pepsin digest was used as the raw material. Peptide sections with good antibacterial activity were determined after bacteriostasis experiments, its molecular weight and amino acid composition were analyzed. The results of experiments indicate that with Sephadex G-50 and distilled water as mobile phase, detection wavelength 220 nm, flow rate 1.5 mL/min, sample density 0.2 g/mL, and volume 0.2 mL are the optimal conditions. Bacteriostasis experime... 相似文献
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Bao-guang Xu Ping Wang Jian-fang WangInstitute of Policy Management Chinese Academy of Sciences Beijing ChinaDepartment of Mathematics Statistics Computer Science St. Francis Xavier University Antigonish NS Canada BG WInstitute of Applied Mathematics Academy of Mathematics System Sciences Chinese Academy of Sciences Beijing China 《应用数学学报(英文版)》2002,(3)
A (k;g)-graph is a k-regular graph with girth g. A (k;g)-cage is a (k;g)-graph with the least possible number of vertices. Let f(k;g) denote the number of vertices in a (k;g)-cage. The girth pair of a graph gives the length of a shortest odd and a shortest even cycle. A fc-regular graph with girth pair (g,h) is called a (k;g,h)-graph. A (k;g,h)-cage is a (k;g,h)-graph with the least possible number of vertices. Let f(k;g,h) denote the number of vertices in a (k;g,h)-cage. In this paper, we prove the following strict inequality f(k;h-1,h)相似文献
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ZhengZukang 《高校应用数学学报(英文版)》2004,19(1):90-100
An algorithm of continuous stage-space MCMC method for solving algebra equation f(x)=0 is given. It is available for the case that the sign of f(x) changes frequently or the derivative f‘ (x) does not exist in the neighborhood of the root,while the Newton method is hard to work. Let n be the number of random variables created by computer in our algorithm.Then after rn=O(n) transactions from the initial value Xo,X^* can be got such that [f(x^*)|<e-^cm|f(xo)|by choosing suitable positive constant c. An illustration is also given with the discussion of convergence by adjusting the parameters in the algorithm. 相似文献
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了研究应急救援物流中存在物资单向转运条件下的受灾点库存策略,考虑由多个受灾点组成的单阶段系统,
各个受灾点之间存在单向转运.首先在各个受灾点物资进货点一定条件下,建立模型确定各个受灾点救援物资
需求依靠从其它受灾点转运得到满足的比例和直接从本身库存中得到满足的比例;其次,建立各个受灾点
救援物资进货水平优化的整数非线性规划模型,并考虑基于时间窗的救援效率水平约束,设计基于隐含
枚举法的模型求解算法;最后,运用算例对模型及其求解算法进行了模拟运算,从而验证了模型的有效性和实用性. 相似文献
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IIntroductlonWrseProblem ofCombinatorial Optunatlon has ttrartedmore砒iemion ofresearchersrecentlx It Is irst nroPosed br D·Burton and Ph·L·h尬 in[11,拙er that J.Zhang,Z.Ma,M.Catnd oth删h印儿done some r田earo work on them陀r%pr加咖s Of shortest path,mat山lug,*].---*1fill sp皿D*旷r%,*砒m皿m伽n山阻111tim c毗,*%r01讥扯所肥出饲811加妙-5].讪出把papers l皿vs conhe their modd onthe suppooltlonth时 sh耐est p毗h,mimmum spanningtree,matd止ng and so on are一、n.h "aner [61,D.Burton… 相似文献
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