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本文研究了具有最大增长方向的面积平均P叶函数的渐近性质和最大增长方向的唯一性,推广并改进了I.M.Milin的一个结果。 相似文献
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关于计算机试验的设计理想和数据分析 总被引:8,自引:2,他引:6
近些年来,计算机试验的设计和分析作为试验设计的一个新的研究方向,被广泛地展开讨论,出现大量的文章,本文介绍近几年来这个方向的研究动态,包括问题提出,建模和预测,最优设计准则,设计和抽样方法,参数估计和算法,Bayes方法,Maximin和Minimax距离设计以及其他问题,也包括本文作者的若干结果。 相似文献
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本文用Ekeland,L变分原理及分析中的几何方法研究了抽象的广义方向导数和广义梯度中的切锥包含问题,给出了一个切锥包含定理. 相似文献
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书评:虽然我国已出版了一批关于随机过程的专著或教科书。但是这些教科书主要是为研究概率论或随机过程方向的研究生所写的,主要的兴趣是数学体系的完整和为未来的对随机过程本身或更深入的数学研究打下基础。然而,对于那些非纯粹数学方向的学生和理论与实际工作者来说,这些书的内容过深,太专门,起点也比较高,但范围又相对较窄,不很适用。从另一方面来说,即使概率论方向的纯数学研究生也需要一本开拓视野,启发思维的简明扼要的随机过程教科书。美国加利福尼亚大学伯克莱分校应用概率专家,著名教授SMRoss所写的“随机过… 相似文献
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本文研究了一般的二阶椭圆问题的混合元方向交替法,给出了两种迭代格式即Uzawa格式和Arrow-Hurwitz格式,并就系数是常数的情形给出了谱分析.本文的结果对油藏模拟有一定的理论和实际意义. 相似文献
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在对知识联盟中知识转移和知识创造过程分析的基础上,本文构造了一个基于吸收能力和知识透明性的知识联盟动态博弈模型,分析了吸收能力和知识透明程度对参与组织决策和利润的重要作用。最后给出了进一步研究的方向。 相似文献
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参数规划的极值函数一般是非可微的且没有显示表示。为了讨论极值函数的变化性质,研究其方向导数有重要作用。本文对两类非可微函数(凸函数和拟可微函数)构成的参数规划问题的极值函数,给出了其普通方向导数的等式表示。 相似文献
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Hans F. Ravn René Victor Valqui Vidal 《The Journal of the Operational Research Society》1986,37(2):205-210
This paper is concerned with some fundamental aspects of the process of transfer of operational research from the industrialized countries to the Third World. Two complementary conceptions of operational research are identified: technical and social operational research. The main contribution of this paper is to regard the discussion of operational research for developing countries as a case of transfer of technology. Finally, some proposals for action and further research will be briefly outlined. 相似文献
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S. L. Cook 《The Journal of the Operational Research Society》1965,16(2):145-175
University education for operational research in Britain is making great and welcome strides forward, but there has been little open discussion of its aims in relation to the advance of the profession. Progress in operational research, and in its application to the really worth-while problems of industry in particular, depends primarily on strengthening the industrial operational research group in its “front line” role. We need a research study of the teaching and practice of industrial operational research, in relation to effectiveness. We need “collaborative” programmes of operational research education in which the university and the industrial operational research group each contribute, in a man's training over a period of years, in the ways in which each is most competent. We need emphasis on “breadth” as well as “depth” in operational research education, and greater attention to the mutual contributions of operational research, teaching and practice, and the teaching and development of management. An impressionist sketch of a programme which might meet these needs is put forward for discussion of principles and feasibility. 相似文献
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The generation and processing of research data for modeling and simulation is an important part of the scientific work at WIAS. Together with scientific software it plays an essential role for the transfer of mathematical research results to industry or to other scientific disciplines. In the face of the emerging digital science agenda research data is now more and more recognized as an essential foundation for scientific work. The importance of research data is also emphasized by the recent adoption of the “DFG Guidelines on the Handling of Research Data” by the Deutsche Forschungsgemeinschaft and the Open Data Pilot within the EU Horizon 2020 programme. In this contribution we present our definition of research data in mathematical modeling and simulation and requirements for its management. (© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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The link between standards and research may not be clearcut. However, in this article the authors argue that there is a notable relationship between standards and research, one that is cyclical in nature. Using the standards for school mathematics developed by the National Council of Teachers of Mathematics (NCTM) as a case in point, the authors examine how NCTM's standards have influenced the agenda for mathematics education research and stimulated research on the impact of those standards. In turn, this and other research played a significant role in the development of NCTM's new Principles and Standards for School Mathematics. The authors conclude with a discussion of ways in which the Principles and Standards may continue this cyclical relationship in coming years, potentially promoting investigation of new research areas and systematic research on the impact of standards. 相似文献
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Operations research and data mining already have a long-established common history. Indeed, with the growing size of databases and the amount of data available, data mining has become crucial in modern science and industry. Data mining problems raise interesting challenges for several research domains, and in particular for operations research, as very large search spaces of solutions need to be explored. Hence, many operations research methods have been proposed to deal with such challenging problems. But the relationships between these two domains are not limited to these natural applications of operations research approaches. The counterpart is also important to consider, since data mining approaches have also been applied to improve operations research techniques. The aim of this article is to highlight the interplay between these two research disciplines. A particular emphasis will be placed on the emerging theme of applying multi-objective approaches in this context. 相似文献
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Fouad El Ouardighi Matan Shnaiderman Federico Pasin 《Journal of Optimization Theory and Applications》2014,161(2):626-647
This paper investigates the research and development accumulation and pricing strategies of two firms competing for consumer demand in a dynamic framework. A firm’s research and development is production-cost-reducing and can benefit from part of the competitor’s research and development stock without payment. We consider decisions in a game characterized by Nash equilibrium. In this dynamic game, a player’s action depends on whether the competitor’s current research and development stock are observable. If the competitor’s current research and development stock are not observable or observable only after a certain time lag, a player’s action can be solely based on the information on the current period t (open-loop strategy). In the converse case, it can also include the information on the competitor’s reaction to a change in the current value of the state vector (closed-loop strategy), which allows for strategic interaction to take place throughout the game. Given the cumulative nature of research and development activities, a primary goal of this paper is to determine whether, regardless of the observability of the competitor’s current research and development stock, free research and development spillovers generate a lower level of scientific knowledge than research and development appropriability. A second objective of the paper is to determine how the observability of the rival’s current research and development stock affects a firm’s research and development and pricing decisions and payoffs under imperfect research and development appropriability. 相似文献