检索结果-南通市图书馆

Exponential Convergence of primal-Dual Dynamical System for Linear Constrained Optimization

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2022年第4期9卷 745-748页

作者： Luyao Guo Xinli Shi Jinde Cao the School of Mathematics Southeast University IEEE School of Cyber Science&Engineering Southeast University School of Mathematics Frontiers Science Center for Mobile Information Communication and SecuritySoutheast University Purple Mountain Laboratories Yonsei Frontier Laboratory Yonsei University

Dear editor,primal-dual dynamics(PDD)and its variants are prominent first-order continuous-time algorithms to determine the primal and dual solutions of a constrained optimization problem(COP).Due to the simple structure,they have received widespread attention in various fields,such as distributed optimization[1],power systems[2],and wireless communication[3].In view of their wide applications,there are numerous theoretic studies on the convergence properties of PDD and its variants,including the exponential stability analysis[4]-[9].

关键词： primal optimization Convergence

primal Pictures-3D解剖学数据库在人体解剖学教学中的应用

在线全文

学校读者我要写书评

暂无评论

解剖学研究 2017年第4期39卷 284-285页

作者：张浩刘辉赵航许妍妍高振平刘海岩吉林大学基础医学院人体解剖学系吉林长春130021

随着我国高校招生规模的持续扩张,标本需求量的显著增加,国内医学院校教学用人体标本资源出现不足,标本的缺乏严重影响了人体解剖学教学质量的提高,将primal Pictures-3D解剖学数据库应用与教学过程各个阶段可以部分缓解人体标本资源出... 详细信息

随着我国高校招生规模的持续扩张,标本需求量的显著增加,国内医学院校教学用人体标本资源出现不足,标本的缺乏严重影响了人体解剖学教学质量的提高,将primal Pictures-3D解剖学数据库应用与教学过程各个阶段可以部分缓解人体标本资源出现不足,丰富教学手段,提高教学质量。通过数据库资料充实理论课课件素材,加强课上学生的理解;实验课以primal Pictures为引导,增强学生的理解和记忆;课后通过开放的数据库平台提高自主学习能力、将课上教学与课下复习联系起来。虽然该平台仍存在一些现实待解决的问题,但在一年多的应用过程中效果良好,具有在今后教学中推广应用的价值。

关键词： primal Pictures-3D 人体解剖学数据库

在线全文

学校读者我要写书评

暂无评论

对於所謂primal环作一个附註

南京大学学报(自然科学版) 1957年第3期 63-66页

作者：周伯壎

在文（1）中,本文作者証明了下述定理: 若R是有么元無零因子的可换环,則R是primal环的充要条件是:R中任二素伊德耶A与B必有A≥B或B≥A。这里的所謂primal是指R的一切真伊德耶都是（在Fuchs意义下的）primal伊德耶（2）。§1.我們現在推... 详细信息

在文（1）中,本文作者証明了下述定理: 若R是有么元無零因子的可换环,則R是primal环的充要条件是:R中任二素伊德耶A与B必有A≥B或B≥A。这里的所謂primal是指R的一切真伊德耶都是（在Fuchs意义下的）primal伊德耶（2）。§1.我們現在推廣这个概念到一般环上。設R是一个可羣环,A,B等大寫字母都表R的真（双边）伊德耶（包括零伊德耶,但不表R本身）。令AB-1={x∈R|xB≤A}。当然AB-1是一个双边伊德

关键词：伊德双边 primal 定理行第表尺

TACKLING INDUSTRIAL-SCALE SUPPLY CHAIN PROBLEMS BY MIXED-INTEGER PROGRAMMING

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2019年第6期37卷 866-888页

作者： Gerald Gamrath Ambros Gleixner Thorsten Koch Matt hias Miltenberger Dimitri Kniasew Dominik Schlogel Alexander Martin Dieter Weninger Zuse Institute Berlin Department Optimization SAP SE SAP Optimization Friedrich-Alexander-Universitat Erlangen-NiimbeTg Department Mathematics

The modeling flexibility and the optimality guarantees provided by mixed-integer programming greatly aid the design of robust and future-proof decision support *** complexity of industrial-scale supply chain optimization,however,often poses limits to the application of general mixed-integer programming *** this paper we describe algorithmic innovations that help to ensure that MIP solver performance matches the complexity of the large supply chain problems and tight time limits encountered in *** computational evaluation is based on a diverse set,modeling real-world scenarios supplied by our industry partner SAP.

关键词： Supply chain management Supply network optimization Mixed-integer linear programming primal heuristics Numerical stability Large-scale optimization

ONE LIMIT THEOREM, OPTIMAL CRITERION AND EXISTENCE THEOREM OF THE DUAL NONLINEAR PROGRAM

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1989年第2期34卷 95-99页

作者：王长钰周惠山 Institute of Operations Research Qufu Normal University

R. T. Rockafellar built a new general convex dual theory by introducing the conjugate function and the perturbation function. Following him, many other authors obtained some important results in generalized convex dua... 详细信息

关键词： primal program dual program characteristic function perturbation parameter.

在线全文

学校读者我要写书评

暂无评论

丙烯酸酯乳液文物保护材料耐老化性能评价

光谱学与光谱分析 2023年第7期43卷 2181-2187页

作者：龚欣韩向娜陈坤龙北京科技大学科技史与文化遗产研究院北京100083 延安市文物研究院陕西延安716000

水溶性的丙烯酸酯乳液是文物领域常用的保护材料,多用于壁画、彩画、骨质文物、漆木器文物的加固和粘接。使用最广泛的丙烯酸酯乳液类文物保护材料是由原罗门哈斯公司生产的primal系列。商品材料如primalAC33、SF016、B60A、WS24和MC76... 详细信息

水溶性的丙烯酸酯乳液是文物领域常用的保护材料,多用于壁画、彩画、骨质文物、漆木器文物的加固和粘接。使用最广泛的丙烯酸酯乳液类文物保护材料是由原罗门哈斯公司生产的primal系列。商品材料如primalAC33、SF016、B60A、WS24和MC76等在国内外的文物保护修复实践中应用较多,但文献报道大多数是直接购买使用的修复案例,缺乏较为系统科学的性能评价研究。针对5种常用的primal系列丙烯酸酯乳液文物保护材料的湿热老化性能和光老化性能开展研究,通过微观形貌、色差和光泽度等分析比较其耐老化性能,采用红外光谱追踪光老化过程中的分子结构变化和吸收峰强度,阐释其降解机理。实验结果表明,WS24和B60A的耐湿热性能较好,SF016耐湿热性能最差;AC33的颜色和失光率变化最明显。光老化测试发现,紫外光照射过程中所有的材料均发生了断链反应,另外AC33与MC76有内酯生成。经过4200 h光老化后,AC33、SF016、B60A和MC76的羰基指数(CI)均有不同程度的增大,羰基吸收峰强度(D_(t))降低了10%~15%。WS24的羰基指数下降非常迅速,羰基吸收峰强度降低了53%,是5种材料中耐光老化性能最差的。综合评价认为,B60A的耐光老化性能、耐湿热性能均较好,是primal系列中耐老化性能最优的丙烯酸酯乳液文物保护材料。

关键词： primal 丙烯酸酯乳液老化机理文物保护红外光谱

Sensitivity Analysis on the Negative Degree of Difficulty Geometric Programming Problem

在线全文

学校读者我要写书评

暂无评论

American Journal of Operations Research 2020年第1期10卷 13-23页

作者： H. O. Amuji N. P. Olewuezi D. E. Onwuegbuchunam C. Igboanusi Department of Statistics Federal University of Technology Owerri Imo State Nigeria Department of Maritime Management Technology Federal University of Technology Owerri Imo State Nigeria Department of Transport Management Technology Federal University of Technology Owerri Imo State Nigeria

The range of optimal values in cost optimization models provides management with options for decision making. However, it can be quite challenging to achieve feasible range of optimality in Geometric programming (Gp) models having negative degrees of difficulty. In this paper, we conduct sensitivity analysis on the optimal solution of Geometric programming problem with negative degree of difficulty. Using imprest data, we determine the optimal objective function, dual decision variables, primal decision variables;the range of values, the cost coefficient and RHS constraint must lie for the solution to stay optimal. From the analysis, we established that incremental sensitivity analysis has the functional form .

关键词： Negative Degree of Difficulty Sensitivity Analysis primal Decision Variables Dual Decision Variables Global Optimal Solution

Dual Based Procedures for Un-Capacitated Minimum Cost Flow Problem

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Operations Research 2016年第6期6卷 468-479页

作者： Priyank Sinha Renduchintala Raghavendra Kumar Sharma Industrial and Management Engineering Department IIT Kanpur Kanpur India

In this article, we devise two dual based methods for obtaining very good solution to a single stage un-capacitated minimum cost flow problem. These methods are an improvement to the methods already developed by Sharma and Saxena [1]. We further develop a method to extract a very good primal solution from a given dual solution. We later demonstrate the efficacies and the significance of these methods on 150 random problems.

关键词： Min Cost Flow Transshipment Dual primal

The Dual of the Maximum Likelihood

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 Statistics 2016年第1期6卷 186-193页

作者： Quirino Paris Department of Agricultural and Resource Economics University of California Davis CA USA

The Maximum Likelihood method estimates the parameter values of a statistical model that maximizes the corresponding likelihood function, given the sample information. This is the primal approach that, in this paper, is presented as a mathematical programming specification whose solution requires the formulation of a Lagrange problem. A result of this setup is that the Lagrange multipliers associated with the linear statistical model (where sample observations are regarded as a set of constraints) are equal to the vector of residuals scaled by the variance of those residuals. The novel contribution of this paper consists in deriving the dual model of the Maximum Likelihood method under normality assumptions. This model minimizes a function of the variance of the error terms subject to orthogonality conditions between the model residuals and the space of explanatory variables. An intuitive interpretation of the dual problem appeals to basic elements of information theory and an economic interpretation of Lagrange multipliers to establish that the dual maximizes the net value of the sample information. This paper presents the dual ML model for a single regression and provides a numerical example of how to obtain maximum likelihood estimates of the parameters of a linear statistical model using the dual specification.

关键词： Maximum Likelihood primal Dual Signal Noise Value of Sample Information