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OPTIMALITY CONDITIONS FOR NONCONVEX BILEVEL PROGRAMMING PROBLEMS 总被引:1,自引:0,他引:1
Recomendation.ThisworkisrecomendedbyamemberiftheEditorialBoard,ProfWANGShouyang.1.IntroductionThebilevelprogrammingproblemcanbestatedasfollows:whereS(x),foreachx,isthesolutionsetofthefollowingparametricprogrammingproblem:whereF,f:Re ~-R,g'Re ~-R"andG:Re ~… 相似文献
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研究并行基因算法求解双层规划问题及其在供应链物流分销系统优化设计中的应用.利用下层优化问题的KKT条件把双层规划问题转化为等价的单层规划问题,再利用并行基因算法对得到的单层规划问题进行全局优化,从而得到双层规划问题的全局最优解,最后,通过具体案例研究了上述算法在供应链物流分销系统优化设计中的应用.结果表明,并行基因算法求解双层规划,充分利用了现有计算环境的并行能力,加快了收敛速度,改善了基因算法的全局收敛性能,算法达到了实用化的规模,是一种很有应用前景的计算方法. 相似文献
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WANG Jianyu 《系统科学与复杂性》1997,(1)
1.IntroductionBentFunctionsformaveryimportantclassofbooleanfunctionsincryptographybecauseoftheirperfectnonlinearity,buttheyareneitherbalancednorthefirstordercorrelationimmune,andveryfewofthemareknown.In[1],Carlet,C.gavethedefinitionofPartiallyBentFunction… 相似文献
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在灰色预测滤波和截断滤波的基础上建立了灰色截断变维法。在截断变维法中嵌入灰色预测滤波 ,用性能优越的机动检测技术为开关 ,在机动区用灰色预测滤波替代并导引截断变维滤波。该方法具有很强的自适应性和更高的滤波跟踪精度 ,其性能优于单模型有参数自适应滤波算法及多模无参数自适应滤波算法 ,同时无需任何先验的统计参数。计算机仿真表明了它的各种优越性。 相似文献
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This paper deals with the problem of finite-time boundedness and finite-time stabilization boundedness of fractional-order switched nonlinear systems with exogenous inputs. By constructing a simple Lyapunov-like function and using some properties of Caputo derivative, the authors obtain some new sufficient conditions for the problem via linear matrix inequalities, which can be efficiently solved by using existing convex algorithms. A constructive geometric is used to design switching laws amongst the subsystems. The obtained results are more general and useful than some existing works, and cover them as special cases, in which only linear fractional-order systems were presented. Numerical examples are provided to demonstrate the effectiveness of the proposed results. 相似文献
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随机动态车队管理问题 总被引:4,自引:0,他引:4
详细描述随机动态车队管理问题,分析问题的随机特性,建立问题的随机线性规划模型。根据未来需求的概率分布函数,设计期望车辆数的估计方法、车辆选择概率的确定方法和车辆期望收益值的确定方法,从而确定线性替代函数斜率,构造线性替代函数来逼近目标函数中的期望函数部分,使问题分解为多个单时段单节点问题,并设计单时段单节点问题的求解方法。最后给出问题的完整求解过程,从而使问题能够得到有效解决。 相似文献
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The one-sided and two-sided hypotheses about the parametric component in partially linear model are considered in this paper.
Generalized p-values are proposed based on fiducial method for testing the two hypotheses at the presence of nonparametric nuisance parameter.
Note that the nonparametric component can be approximated by a linear combination of some known functions, thus, the partially
linear model can be approximated by a linear model. Thereby, generalized p-values for a linear model are studied first, and then the results are extended to the situation of partially linear model.
Small sample frequency properties are analyzed theoretically. Meanwhile, simulations are conducted to assess the finite sample
performance of the tests based on the proposed p-values. 相似文献
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用于触觉建模的生物组织切割特征多参量采集 总被引:4,自引:0,他引:4
基于图像及三维磁跟踪的方法,设计了生物组织切割过程的多参量(切割力,切割深度及切割速度)采集系统,并针对猪肝脏,心脏,肌肉等软组织进行了系统性能的实验验证;研究了手术刀在切割不同组织时,切割速度,切割深度等与切割反馈力,破裂极限间的相互关系,并初步给出了手术刀连续切割的力反馈触觉模型;为进一步研究生物组织的物理特性及基于真实的切割过程的手术模拟提供了实验条件。 相似文献
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一种具有三角模糊系数的线性规划方法 总被引:7,自引:0,他引:7
针对模糊系数的线性规划,提出了一种将三角模糊系数的线性规划转化为常规线性规划的方法,同时给出几个定理和命题以及相应的算法。该方法与常规方法的不同之处在于目标函数和限制条件中模糊系数的隶属度可以取不同的值。因此提出的方法取得的规划结果更加满足决策者的需要。最后通过实例说明该方法的有效性,并且表明该方法在某些条件下与一些常规方法是一致的。 相似文献
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王应明 《系统工程与电子技术》1991,(9)
本文对传统的多维偏好线性规划分析方法——LINMAP法进行改进,提出一种新的多维偏好线性规划分析方法。该方法运用加性加权法建立线性规划模型,同时引入任意小正数δ,使得评价结果更加符合于决策人偏好集。 相似文献
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离散模糊系统的新型模糊控制器与观测器设计 总被引:1,自引:1,他引:0
基于T-S模糊动态模型,研究了一类在状态空间形式下,离散模糊系统的稳定监督控制器的设计与分析,将全局模糊型按隶属函数重新划分成若干子空间,采用分段Lyapunov函数法,克服了以往设计法中需要求解一公共正定矩阵P的不足,也无需求解繁琐的Riccati方程,并针对系统状态不可测的实际情况,设计了模糊观测器,从而用成熟的线性系统理论完成对复杂非线性系统的控制,模糊控制器与观测器设计简单,适合工程应用。 相似文献
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In the era of big data, stock markets are closely connected with Internet big data from diverse sources. This paper makes the first attempt to compare the linkage between stock markets and various Internet big data collected from search engines, public media and social media. To achieve this purpose, a big data-based causality testing framework is proposed with three steps, i.e., data crawling,data mining and causality testing. Taking the Shanghai Stock Exchange and Shenzhen Stock Exchange as targets for stock markets, web search data, news, and microblogs as samples of Internet big data, some interesting findings can be obtained. 1) There is a strong bi-directional, linear and nonlinear Granger causality between stock markets and investors' web search behaviors due to some similar trends and uncertain factors. 2) News sentiments from public media have Granger causality with stock markets in a bi-directional linear way, while microblog sentiments from social media have Granger causality with stock markets in a unidirectional linear way, running from stock markets to microblog sentiments.3) News sentiments can explain the changes in stock markets better than microblog sentiments due to their authority. The results of this paper might provide some valuable information for both stock market investors and modelers. 相似文献
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基于灰色组合模型的河南省粮食产量预测 总被引:3,自引:1,他引:2
一元线性回归有直线趋势,而GM(1,1)能较好地模拟指数变化的趋势。但是,如果原始序列整体上是直线趋势,在少数点上,数据模拟值和回归直线偏离较大时,线性函数已不能很好地预测数据序列的变化了。对于此类问题,将数据分为跳变点(即模拟值偏离回归直线较大)和非跳变点数据,并将跳变点又分为上、下跳变点,借鉴灰色灾变预测原理,用GM(1,1)模型预测跳变点数据,而对其他非跳变点使用去掉跳变点后的数据形成的新的线性回归方程进行预测。通过对河南省粮食产量的预测,结果表明该方法很好地克服了GM(1,1)模型和线性回归模型的缺陷,具有较好的实际应用价值。 相似文献