锥b-Banach空间上非扩张映射的不动点定理

在锥b-Banach空间上考虑多个映射的公共不动点问题,利用Mann迭代法以及锥b-范数的条件下证明锥b-Banach空间上多个映射的公共不动点的存在性.     

度量空间上具有φ-压缩条件的映射族的重合点和公共不动点

在度量空间上得到满足φ-收缩条件的集值映射及单值映射的公共不动点和重合点存在性定理,同时给出若干个不动点定理.     

度量空间上A-收缩映射的不动点定理的改进

引进新的三元函数类A~*改进已知的A-收缩条件并给出一个映射的不动点和一族映射的公共不动点存在定理,同时讨论具有两个度量的非空集合上自映射在非连续和非完备下的不动点存在性问题.所得结论推广和改进了很多已知结论.     

锥度量空间中c-距离下非连续映射的公共不动点定理

在不要求映射的连续性,也不要求锥的正规性的条件下,获得了锥度量空间中,c-距离下两个映射的公共不动点定理.定理的结论上不仅得到了公共不动点的存在性,还得到其唯一性,改进和推广了原有的许多重要结果,同时给出了相应的例子.     

锥度量空间上满足新的Lipschitz条件的三个映射的公共不动点

在没有正规条件的锥度量空间框架下,证明了具有Lipschitz条件的三个映射的公共不动点定理.同时,在具有偏序关系的锥度量空间上讨论了公共不动点存在问题.所得结果推广和改进了许多收缩型不动点定理和公共不动点定理.     

序偏度量空间中一类映射的重合点与公共不动点定理(英文)

本文在序偏度量空间中证明了一类映射在满足一般弱压缩条件时的重合点与公共不动点的存在性.     

拟度量空间上满足收缩条件的映射(族)的不动点和公共不动点

通过构造拟度量空间上的收敛序列,得到满足Lipschitz收缩条件的映射存在唯一不动点的定理和满足由收缩函数决定的收缩条件的映射族的重合点和公共不动点的存在定理以及一个映射的唯一不动点存在定理.     

度量空间上具有变系数的收缩条件的两个集值映射的公共不动点

在完备的度量空间上利用满足具有某种变系数的收缩条件或φ-收缩条件的两个集值映射构造了一个收敛序列,然后证明了该序列的唯一极限就是两个映射的公共不动点并给出了映射族存在唯一公共不动点的充分条件,同时给出了几个特殊结果.所得结果推广和改进了一些已有的结论.     

TVS-值锥度量空间上拟-Lipschitz型映射族的公共不动点

在TVS-值锥度量空间上给出若干可数个满足拟-Lipschitz条件的满映射族的唯一公共不动点的存在性定理.主要结论推广和改进了文献中的一些相应结论.     

度量空间上满足拟收缩条件的两个集值映射的公共不动点

在完备的度量空间上利用满足具有某种变系数的拟收缩条件或φ-拟收缩条件的两个满的集值映射构造了一个收敛序列,然后证明了该序列的唯一极限就是两个映射的公共不动点并给出了映射族存在唯一公共不动点的充分条件,同时给出了几个特殊结果.所得结果推广和改进了一些已有的结论.     

复杂非线性系统的控制综合与动态分析

随着当代科学和技术的发展,复杂非线性系统和控制理论研究不断深入,应用领域不断扩大,已影响了科技和社会领域的许多方面.针对当今该领域的研究难点和重点,本文集中讨论了复杂非线性系统控制研究中的3个关键问题,包括非光滑系统控制、网络化系统控制、临界态分析与控制.一方面是对在相关研究领域中的部分科研成果做一个简要的总结;另一方面,想借此机会在自动化学会控制理论专业委员会成立50周年之际向专业委员会表示感谢和祝贺.     

Making Statistics Significant in a Short Course for Graduates with Widely-Varying Non-Statistical Backgrounds

With reference to a short compulsory module for MBA students, this paper discusses how, despite a range of pressures and an extraordinary range of student backgrounds, fears and motivations, it is possible to quickly facilitate understanding and confidence in handling data and basic statistics for graduates in business and associated workplaces. Links and contrasts with a variety of undergraduate teaching scenarios help to enrich teaching and learning strategies, and the strategies and materials developed through interaction with the range of MBA students are transferable to other postgraduate coursework situations. In particular, the need for understanding and confidence in handling data and its presentation, in considering categorical and simple continuous data, and in understanding correlation and association, are common across many different workplaces and applications.     

基于产品生命周期的闭环供应链定价和协调策略研究

研究产品生命周期条件下一个制造商、一个零售商组成的闭环供应链的定价和协调策略:制造商第一周期只生产新品,从第二周期开始生产再制造品,并负责回收。建立了两周期、多周期和无限周期下的分散决策模型和多周期下的集中决策模型,得到最优定价和生产策略。结果表明:两周期中,制造商和零售商应根据不同的成本节约额制定不同的批发价、零售价和生产量。多周期中,当成本节约额比较小时,除第一和最后一个周期外,制造商和零售商应采取相同的定价和生产策略;当成本节约额比较大时,除第一和最后两个周期外,制造商和零售商应采取相同的定价和生产策略。无限周期中,除第一周期以外,制造商和零售商都应该采取相同的定价和生产策略。在有限周期情况下,制造商和零售商应通过在前期制定比较低的批发价和零售价,以提高生产量和销售量,使得后期的回收量增大,达到降低成本的目的。通过引入收益共享契约制定合适的批发价和销售收入及再制造收益共享比率可以协调整个闭环供应链。算例验证了上述结论。     

中美微积分教材比较研究

微积分课程的教学对高校创新型人才的培养具有重要的作用,其教材建设受到普遍关注.本文以微积分教学方法和教学理念为主线,从教材内容和案例选取、教材结构顺序以及教材表述方式等不同的角度,分析了国内外部分优秀微积分教材所具备的特色.依此为基础,以中美两部具有代表性的微积分教材为比较对象,着重对两本教材在知识点衔接、新知识的引入方式以及提出问题、分析问题的构思方法和阐述方式等具体方面进行了较细致的对比,力图从中展示出中美高等教育在教学思想和表现形式上的某些不同之处,由此得到一些有益的启示.最后,文章列举了美国微积分教材,在语言表达风格、教学案例和习题设计以及教材配套服务等诸多方面值得借鉴的经验和方法.     

GAMM Annual Meeting – Dresden 2004 Overview of the Sessions

Volume 4 (2004) of PAMM “Proceedings in Applied Mathematics and Mechanics” assembles the contributions to the GAMM Annual Meeting 2004, held 21–27 March 2004 in Dresden, Germany. The contributions are grouped according to the minisymposia and sessions of the conference. Minisymposia Mathematics MA1 Stochastic programming in energy and process engineering MA2 Numerical problems of stochastic dynamical systems MA3 Adaptive FEM MA4 PDE‐constrained optimization / optimization with PDEs MA5 Epitactic growth MA6 Nonlinear eigenvalue problems Minisymposia Mechanics ME1 Thin viscous films ME2 Drop–surface interactions ME3 Developments in auditory mechanics ME4 Microstructure of materials and scale bridging modeling ME5 Mechanics of smart structures and materials ME6 Micromagnetism Sessions 1–24 1 Linear and nonlinear oscillations 2 Stability and control theory 3 Multibody systems and kinematics 4 Elastic and viscoelastic materials and systems 5 Plasticity: constitutive equations and applications 6 Theory of materials and modelling of materials 7 Damage and fracture 8 Computational mechanics 9 Experimental methods and identification 10 Gas dynamics and rarefied gases 11 Viscous flows 12 Transition and turbulence 13 Heat and mass transfer, convective flows 14 Multiphase flows, flows of reactive fluids 15 Waves, acoustics 16 Applied analysis 17 Mathematical methods of the natural sciences and engineering 18 Computer algebra and computer analysis 19 Applied stochastics, operations research 20 Optimization 21 Numerical analysis 22 Applied and numerical linear algebra 23 Numerical treatment of ordinary and algebro‐differential equations 24 Numerical treatment of partial differential equations     

Foreword to the Special Focus on Mathematics,Data and Knowledge

There is a growing interest in applying mathematical theories and methods from topology, computational geometry, differential equations, fluid dynamics, quantum statistics, etc. to describe and to analyze scientific regularities of diverse, massive, complex, nonlinear, and fast changing data accumulated continuously around the world and in discovering and revealing valid, insightful, and valuable knowledge that data imply. With increasingly solid mathematical foundations, various methods and techniques have been studied and developed for data mining, modeling, and processing, and knowledge representation, organization, and verification; different systems and mechanisms have been designed to perform data-intensive tasks in many application fields for classification, predication, recommendation, ranking, filtering, etc. This special focus of Mathematics in Computer Science is organized to stimulate original research on the interaction of mathematics with data and knowledge, in particular the exploration of new mathematical theories and methodologies for data modeling and analysis and knowledge discovery and management, the study of mathematical models of big data and complex knowledge, and the development of novel solutions and strategies to enhance the performance of existing systems and mechanisms for data and knowledge processing. The present foreword provides a short review of some key ideas and techniques on how mathematics interacts with data and knowledge, together with a few selected research directions and problems and a brief introduction to the four papers published in the focus.     

The NCTM Process Standards and the Five Es of Science: Connecting Math and Science

This study investigates defining characteristics among the process standards of the Principles and Standards for School Mathematics and the 5 Es from the National Science Education Standards and the Inquiry and the National Science Education Standards. These characteristics are used to demonstrate similarities and differences between the learning of mathematics and science, discuss implications from such, and argue for the integration of mathematics and science curriculum and instruction.     

基于不同产品质量安全水平的企业生产决策优化及相应消费者效用

基于消费者对产品平均质量安全水平的预期不同,在企业可以同时选择生产高、低质量安全水平产品的条件下,分别建立了完全垄断与完全竞争市场中的企业利润最大化模型,比较分析了企业供给产品的数量、利润及相应的消费者效用,得出消费者质量安全水平敏感度、产品需求价格敏感度及产品的高、低质量安全水平对上述决策的影响.据此,结合我国国情,为中国产品质量安全水平的提升提供了参考与启示.     

京沪文化创意产业发展比较研究

北京市和上海市的文化创意产业发展迅速,已经成为支柱性产业.北京形成文化创意产业发展的"一核、一带、两轴、多中心"的空间发展格局,而上海则形成"一轴、一带、两河、多圈"的空间格局.北京以京派文化、首都文化等为基础,形成"3+3+X"的文化创意产业发展模式,而上海以沪派文化、国际经济中心等为基础,形成"5+3+3"的文化创意产业发展模式.北京市和上海市都已经通过多元投融资渠道,在园区发展模式上由自发型走向政府导向型模式.