检索结果-南通市图书馆

Solution of Stochastic Quadratic Programming with Imperfect Probability Distribution Using Nelder-Mead Simplex Method

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Applied mathematics and Physics 2018年第5期6卷 1111-1119页

作者： xinshun ma Xin Liu Department of mathematics and Physics North China Electric Power University Baoding China

Stochastic quadratic programming with recourse is one of the most important topics in the field of optimization. It is usually assumed that the probability distribution of random variables has complete information, but only part of the information can be obtained in practical situation. In this paper, we propose a stochastic quadratic programming with imperfect probability distribution based on the linear partial information (LPI) theory. A direct optimizing algorithm based on Nelder-Mead simplex method is proposed for solving the problem. Finally, a numerical example is given to demonstrate the efficiency of the algorithm.

关键词： Stochastic Quadratic Programming LPI Nelder-Mead

Multicut L-Shaped Algorithm for Stochastic Convex Programming with Fuzzy Probability Distribution

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2012年第4期2卷 219-222页

作者： Miaomiao Han xinshun ma School of mathematics and Physics North China Electric Power University Baoding Hebei Province China

Two-stage problem of stochastic convex programming with fuzzy probability distribution is studied in this paper. Multicut L-shaped algorithm is proposed to solve the problem based on the fuzzy cutting and the minimax rule. Theorem of the convergence for the algorithm is proved. Finally, a numerical example about two-stage convex recourse problem shows the essential character and the efficiency.

关键词： stochastic convex programming fuzzy probability distribution two-stage problem multicut L-shaped algorithm

一类带有maxEMin评判的补偿型随机规划算法

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

运筹学学报 2016年第4期20卷 52-60页

作者：张艳丽马新顺华北电力大学数理系河北保定071003

补偿型随机规划一般假定随机变量的概率分布具有完备信息,但实际情况往往只能获得部分信息.针对离散概率具有一类线性部分信息条件而建立了带有maxEMin评判的两阶段随机规划模型,借助二次规划和对偶分解方法得到了可行性切割和最优切割... 详细信息

补偿型随机规划一般假定随机变量的概率分布具有完备信息,但实际情况往往只能获得部分信息.针对离散概率具有一类线性部分信息条件而建立了带有maxEMin评判的两阶段随机规划模型,借助二次规划和对偶分解方法得到了可行性切割和最优切割,给出了基于L-型的求解算法,并证明了算法的收敛性.通过数值实验表明了算法的有效性.

关键词：随机规划不完备概率分布补偿函数二次规划 L-型算法

在线全文

学校读者我要写书评

暂无评论

网上遗传特征逐代传播模型的实验设计

计算机应用与软件 2007年第7期24卷 187-189页

作者：石彤菊马新顺李永蕊华北电力大学数理学院河北保定071003

从线性代数的基本理论出发,研究遗传学中的常染色体遗传和常染色体隐性病遗传的规律,并采用Visual Java++对这一研究结果编程,在互联网上设计实现了对遗传特征逐代传播规律的研究。

关键词：数学实验互联网 JAVA小程序常染色体遗传

在线全文

学校读者我要写书评

暂无评论

一类随机非线性规划的积极集SQP算法

应用数学与计算数学学报 2018年第2期32卷 365-373页

作者：刘存哲马新顺华北电力大学数理系河北保定071003

在等价非线性扩展模型的基础上,给出了求解一类随机非线性规划的序列二次规划(sequential quadratic programming,简称SQP)算法.与标准SQP算法不同,本文算法采用积极集方法求解SQP子问题以加快收敛速度,并采用滤子方法确定搜索步长,克... 详细信息

在等价非线性扩展模型的基础上,给出了求解一类随机非线性规划的序列二次规划(sequential quadratic programming,简称SQP)算法.与标准SQP算法不同,本文算法采用积极集方法求解SQP子问题以加快收敛速度,并采用滤子方法确定搜索步长,克服了传统方法选取惩罚因子的困难.在一定条件下证明了所给算法的收敛性.最后,通过一个数值例子验证了该方法的有效性.

关键词：随机非线性规划序列二次规划积极集滤子

在线全文

学校读者我要写书评

暂无评论

部分信息概率分布条件下的发电公司竞价策略

电力科学与工程 2011年第9期27卷 47-50页

作者：康晓红马新顺华北电力大学数理学院河北保定071003

研究了部分信息概率分布条件下的发电公司竞价策略问题。在模糊概率分布的条件下,建立了发电公司最优竞价策略的随机规划模型,给出了基于水平切割技术及最大最小准则的求解方法。算例说明了概率分布不确定信息对最优决策的影响机理。

关键词：电力市场竞价策略模糊概率分布随机规划

Effects of primary PCI and facilitated PCI on myocardial viability and ventricular systolic synchrony in acute myocardial infarction patients

在线全文

学校读者我要写书评

暂无评论

介入放射学杂志 2003年第S1期12卷 150-页

作者：谷新顺傅向华马宁河北医科大学第二医院

Objective To evaluate short time effects of primary percutaneous coronary intervention (pPCI) and rtPA thrombolysis+PCI (rtPA+PCI) on myocardial viability and ventricular systolic synchrony in AMI *** Eighty seven patients with first AMI were divided into two groups: group A ( n =42), pPCI group, the patients underwent PCI within 6h after onset of AMI; group B ( n =45), rtPA+PCI group, the patients underwent PCI after thrombolysis within 6h after onset of AMI; Myocardial viability was measured by 99m Tc MIBI SPECT. While, the parameters of cardiac function LVEF and ventricular systolic synchrony LVPS were measured by 99m Tc gated cardiac blood pool image on the first and the fourth weekend. Results (1) The peak CK MB was significantly lower in group A than that in group B( P maintain ventricular systolic synchrony and improve ventricular function; (2) but, in those hospitals that there were no any condition for PCI, they should transfer the patients to central hospital for PCI after thrombolysis at the first time. It is beneficial to improve myocardial viability and ventricular systolic synchrony of AMI patients in short time.

关键词： PCI 石家庄河北 Effects of primary PCI and facilitated PCI on myocardial viability and ventricular systolic synchrony in acute myocardial infarction patients 河北医科大学第二医院 in on of

Tectonic features,genetic mechanisms and basin evolution of the eastern Doseo Basin,Chad

在线全文

学校读者我要写书评

暂无评论

Petroleum Exploration and Development 2023年第5期50卷 1151-1166页

作者： GAO Huahua DU Yebo WANG Lin GAO Simin HU Jie BAI Jianfeng ma Hong WANG Yuhua ZHANG xinshun LIU Hao China National Oil and Gas Exploration and Development Corporation Beijing 100034China Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China Exploration and Development Research Institute of PetroChina Yumen Oilfield Company Jiuquan 735019China Research Institute of Bureau of Geophysical Prospecting Inc. CNPCZhuozhou 072751China

The features of the unconformity,fault and tectonic inversion in the eastern Doseo Basin,Chad,were analyzed,and the genetic mechanisms and basin evolution were discussed using seismic and drilling *** following results are ***,four stratigraphic unconformities,***(Tg),mangara Group(T10),lower Upper Cretaceous(T5)and Cretaceous(T4),four faulting stages,*** extensional faults,Aptian–Coniacian strike-slip faults,Campanian strike-slip faults,and Eocene strike-slip faults,and two tectonic inversions,*** and end of Cretaceous,were developed in the Doseo ***,the Doseo Basin was an early failed intracontinental passive rift basin transformed by the strike-slip movement and tectonic *** initial rifting between the African and South American plates induced the nearly N-S stretching of the Doseo Basin,giving rise to the formation of the embryonic Doseo rift *** nearly E-W strike-slip movement of Borogop(F1)in the western section of the Central African Shear Zone resulted in the gradual cease of the near north-south rifting and long-term strike-slip transformation,forming a dextral transtension fault system with inherited activity but gradually weakened in intensity(interrupted by two tectonic inversions).This fault system was composed of the main shear(F1),R-type shear(F2-F3)and P-type shear(F4-F5)faults,with the strike-slip associated faults as *** strike-slip movements of F1 in Cretaceous and Eocene were controlled by the dextral shear opening of the equatorial south Atlantic and rapid expanding of the Indian Ocean,*** combined function of the strike-slip movement of F1 and the convergence between Africa and Eurasia made the Doseo Basin underwent the Santonian dextral transpressional inversion characterized by intensive folding deformation leading to the echelon NE-SW and NNE-SSW nose-shaped uplifts and unconformity(T5)on high parts of the *** convergence between Africa and Eu

关键词： Doseo Basin Cretaceous unconformity strike-slip fault tectonic inversion genetic mechanism basin evolution

在线全文

学校读者我要写书评

暂无评论

喷射器内湍流混合的多尺度模拟

化工学报 2009年第1期60卷 157-162页

作者：毕荣山马连湘程华农谭心舜郑世清青岛科技大学计算机与化工研究所青岛科技大学机电工程学院山东青岛266042

利用宏观混合分数方差和微观混合分数方差定量表征宏观混合和微观混合状态,对喷射器内的湍流混合进行了多尺度模拟和研究,并计算出了达到完全混合所需要的特征混合时间。对不同操作条件下的多尺度混合情况进行了模拟计算和分析。结果表... 详细信息

利用宏观混合分数方差和微观混合分数方差定量表征宏观混合和微观混合状态,对喷射器内的湍流混合进行了多尺度模拟和研究,并计算出了达到完全混合所需要的特征混合时间。对不同操作条件下的多尺度混合情况进行了模拟计算和分析。结果表明:在引射流速度不变的情况下,增加喷嘴速度,可以降低达到完全混合所需要的时间;在喷嘴速度不变的情况下,增加引射流速度,可以增加达到完全混合所需要的时间;在喷嘴和引射流速度比不变的情况下,增加两者绝对速度,可以降低达到完全混合所需要的时间;在本文所研究的情况下,喷射反应器内湍流混合过程由微观混合控制。

关键词：喷射器湍流混合多尺度模拟