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双环网络G(N;1,s)的L形瓦仿真算法 总被引:10,自引:3,他引:10
提出双环网络G(N;1,S)的L形瓦仿真算法,利用VB6.0作为编程语言、SQL Server2000作为数据库来实现这一算法,对任意给定N,而2=相似文献
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利用仿真来研究双环网络G(N;1,s)的紧优分布特性在国内外文献中尚未见到。提出一种快速仿真算法,计算出任意N存在的紧优个数n,仿真出4≤N≤1000的n-N紧优分布率和n/(N-2)-N紧优分布率,并列出其中无紧优双环网络的N值。仿真结果表明,n—N分布呈现平稳的波动特性,n不随着N递增,而n/(N-2)随着N的增加呈波动性下降的趋势,并且与N的奇偶性无关。 相似文献
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田丰 《系统科学与复杂性》1991,(4)
Combining forbidden subgraphs with degree restrictions and neighborhood unionrestrictions,respectively,we prove the following results:(1) Let G be a 2-connected graph of order n,and 3≤c≤n.If for each induced subgraphL of order four of G(?)|V_1(L)∩S_c|≥2 if L≌K_(1,3),and |V(L)∩S_c|≥1 if L≌P_4,then thecircumference of G is at least c,where V_1(L)is the set of vertices with degree 1 of L,S_c isthe set of vertices with degree at least c/2 of G and P_4 is a path of order 4.(2) Let G be a 2-connected graph of order n,and n≥s+2.If for each induced subgraphL of G isomorphic to K_(1,3)or P_4,d_L(u,v)=2(?)|N(u)∪N(v)|≥s,then the circumferencec (G) of G is at least s+2.Moreover,if n≥s+3 and s is odd,then c(G)≥s+3. 相似文献
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1 IntroductionWe discuss the following bilevel multi-objective decision making problemmaxx F( x,y) ( 1 a)s.t. G( x,y)≤ 0 ( 1 b)maxyifi( x,yi) , i =1 ,… ,p ( 1 c)s.t. gi( x,gi)≤ 0 , i =1 ,… ,p ( 1 d)where F( x,y) =( F1 ( x,y) ,… ,FM( x,y) ) ,M≥ 2 .x=( x1 ,x2 ,… ,x N) Tand yi=( yi1 ,… ,yin) Tstand for the decision variable of the upper-level decision maker and the decision variable ofthe lower-level i-th decision making unit;y=( y T1 ,… ,y Tp) T;letn =∑pi=1ni;F∶ Rn N → RM… 相似文献
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用迭加法分析非线性网络的稳定性 总被引:3,自引:0,他引:3
黄炳华 《系统工程与电子技术》2001,(6)
非线性网络 N 建立周期振荡的充分必要条件是存在一个满足功率平衡 P =0 ,Q=0 的等效模型 ,这个模型是无限多个线性微变模型Njk的迭加 ,其中起码必须有一个成份满足Pjk≤ 0和Qjk≤ 0 。如果对于任意的微变成份都是Pjk >0和Qjk >0 ,迭加的结果必然有P >0或Q >0 ,则网络N无法寄生任何形式的周期振荡。这个含非线性放大器的网络是稳定的 相似文献
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楼琦良 《系统工程与电子技术》1987,(5)
在有约束(尤其是非线性约束)的微分方程组曲线族求解及最佳化设计计算中所广泛采用的各种惩罚函数法,均因存在高时耗的选代过程,很难为大型数值积分型子优计算所接受。尤其严重的是,对某些约束条件若惩罚不当,就会干扰调优“走向”,导致“假优”的出现。如采取通过随机采集计算终止点的数值解对指定解(给定的终界约束条件)的散布误差,用于随机回归修正相应初值,并对指定解步长过算引起的漂移误差,进行负步长回积修正的方法,就可使计算以最少的时耗(一次回归、一步回积即可)获得指定解的满意结果。这种方法具有很好的通用性,对于大型寻优计算,例如以弹道族计算为基础的战术导弹总体参数最佳化设计计算,更能显示其优越性,且能解决用罚函技术难以解决的问题,可供工程实用。 相似文献
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《系统工程理论与实践》2014,(5)
正August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists 相似文献
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《系统科学与系统工程学报(英文版)》2014,(2)
正AF:Any Field The School of Economics and Management at Tsinghua University(Tsinghua SEM)invites applications for faculty positions at all levels(Assistant Professor,Associate Professor and Full Professor)in any fields of business administration and management.Tsinghua SEM is the only school 相似文献
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《系统科学与系统工程学报(英文版)》2014,(4)
正June 22-24,2015Guangzhou,China http://iec.cnsba.com/index.htmlCo-Sponsored by:ffiEE SMC(pending)South China University of Technology The Chinese University of Hong Kong Tsinghua UniversityHosted bv:School of Business Administration,South China University of Technology,China Conference Co-Chairs: 相似文献
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The paper is about negotiating with issues that discourage innovation. The subject is environmental deterioration, with concern directed at the impediments that keep it from being innovatively resolved. The paper is organized around three issues. (1) The dominant model of environmental concern, called environmental protection, is managed predominantly via command and control approaches. (2) Command and control, by relying on analytical segmentation to subdivide the problem into digestible bits and using formal legislation to direct it, are not up to emerging challenges in the area. (3) More robust models are available but difficult to experiment with due to impediments that discourage change. These impediments are seen in ideals associated with protection, prevention, recycling, and sustainability that tend to do more to sustain harmful practices than to seek beneficial alternatives. Being able to appreciate the underlying restrictions of entropy could help stimulate a more innovative agenda. These issues are tested via a project funded by the EPA entitled ENERGY STAR Homes. 相似文献