考虑专利保护和渠道偏好的再制造双渠道闭环供应链决策与协调

本文在电子商务环境下考虑消费者对零售渠道和直销渠道具有不同的渠道偏好,研究了专利许可零售商实施再制造的双渠道闭环供应链定价决策和协调问题。运用博弈论方法求得了集中决策和分散决策情形下的最优定价策略,并分析了消费者渠道偏好系数对节点企业最优定价策略及利润的影响。针对分散决策存在效率损失的问题,以集中决策的最优解为基准,通过联合运用一个由批发价格、直销价格和专利许可费构成的定价机制和一个利润分享机制,实现了双渠道闭环供应链的完美协调。     

零售商价格领导权结构下考虑专利保护的闭环供应链定价策略

很多零售商常处于其所在供应链的主导地位,针对零售商具有价格领导权并且考虑专利保护的闭环供应链进行分析,运用博弈理论得到了零售商、原制造商和再制造商的最优策略,以及最优策略关于再制造成本节约的变化规律。研究表明:随着再制造成本节约的增加,最优单位专利许可费和废旧产品回收价格逐步增加,最优产品批发价格和销售价格逐步降低,并通过数值算例表明:零售商、再制造商和供应链系统的利润逐步增加,原制造商的利润逐步减少。     

价格竞争下风险规避对闭环供应链决策的影响研究

基于零售商销售价格与回收价格竞争情形,构建了一个可持续的闭环供应链.考虑决策者风险规避行为,研究了闭环供应链成员的定价决策问题.利用博弈论,在风险中性与风险规避特性下分别探讨了批发价格,零售价格和回收价格的最优决策,并建立了它们的表达式.研究结论表明,仅当零售商具有风险规避时,制造商决策不受零售商的影响,而仅当制造商具有风险规避时,零售商决策会受制造商的影响.同时,当二者都具有风险规避特性时,他们之间的决策会相互影响.     

专利保护下再制造闭环供应链差别定价与协调研究

本文目的是研究当再制造闭环供应链系统中原制造商具专利保护以及新产品与再制造品之间存在差异情况下,闭环供应链系统成员的最优决策及系统协调机制设计问题。根据现实情形构建了再制造闭环供应链差别定价模型,利用博弈理论讨论了集中决策与分散决策情形下节点企业的最优定价策略及最优利润。研究结果表明,废旧产品的再造率和专利许可费用均对废旧产品的回收价格和回收量具有一定的影响;消费者对再制造品的接受程度会影响到供应链系统各方的最优定价策略及利润;提出的一种收益-费用分担契约协调机制,可以实现分散决策下闭环供应链系统的协调和效率优化。     

制造商公平偏好下双渠道闭环供应链定价与协调

将制造商公平偏好行为特征引入双渠道闭环供应链,针对非合作独立决策、完全合作联合决策两种不同情形分别建立相应的定价决策模型.运用博弈理论求得两种不同情形下的最优定价策略,并分析了公平偏好系数对供应链各成员最优定价策略及利润的影响.研究发现:制造商公平偏好行为特征能增强其讨价还价能力,但不利于提升供应链经济效益和社会绿色环保效益;非合作独立决策下的系统利润低于完全合作联合决策下的系统利润.为此,通过联合运用一个由批发价格、直销价格和回收转移价格组成的定价机制和一个两部定价补充协议对双渠道闭环供应链进行协调,可以实现双方的Pareto改进.     

技术许可下信息分享和政府补贴对闭环供应链的影响分析——基于经销商再制造模式

研究了信息分享对制造商许可经销商从事再制造模式下闭环供应链的影响。分别建立了无信息分享和信息分享下经销商再制造和制造商再制造两种模式下的闭环供应链模型并分析了政府补贴对废旧产品回收量和渠道成员决策的影响。研究发现,当经销商对制造商进行信息分享时,经销商的利润减少,而制造商的利润增加。渠道领导者制造商总是能从再制造活动中抽取利润,在经销商再制造模式下,制造商通过收取许可费分享再制造的利润;在制造商再制造模式下,制造商设定适当的批发价格及回收价格协调正向流和逆向流,从而实现利润最大化。同时表明了政府补贴的刺激会显著地提高废旧产品的回收量。     

基于回收可替代产品的闭环供应链协调模型

应用博弈论对两种可替代产品回收的定价策略进行研究,得出分散决策模型和集中决策模型的均衡解.提出收益费用共享契约,实现供应链的协调.最后,利用数值仿真得出重要的管理启示:1)制造商提供的最优批发价格和销售商提供的最优销售价格均很大程度上取决于该产品本身的成本结构,也与另外一种产品的价格存在关系.2)收益费用共享契约下,制造商提供的批发价格与两种产品的成本结构均有关,并且呈现出相关规律.     

碳限额下双渠道供应链减排与定价决策

考虑由单一制造商和单一零售商组成的两级供应链系统,零售商可以通过直销渠道将产品销售给顾客,也可以通过传统的零售渠道将产品销售给顾客,两种渠道产品需求受减排量和价格影响.分析了集中式双渠道供应链决策,以及基于Stackelberg博弈时分散式双渠道供应链决策,得到了双渠道供应链的最优定价以及最优减排量.数值算例表明,减排投入对于制造商和零售商的定价决策有重要影响,制造商和零售商的定价决策以及利润与零售渠道的偏好程度以及减排成本的分担比例密切相关,碳排放权的市场价格变化与最优零售价格、最优直销价格、减排量和批发价格变化呈正相关;最后,制造商利润随碳配额的增加而增加.     

制造商主导的供应链产品绿色度与定价协调

针对需求信息不对称下制造商主导型供应链中产品绿色度与定价协调决策问题,分析了产品绿色度与产品销售价格、批发价格及市场需求间的关系,运用收益共享契约原理,建立了以收益共享系数为变量的零售商产品销售价格函数和利润函数以及制造商产品绿色度函数、批发价格函数和利润函数,运用不对称Nash协商原理,进一步构建了在制造商谈判能力给定条件下的收益共享系数优化模型,并通过数值仿真分析验证了需求信息不对称下供应链产品绿色度与定价协调优化结果.研究表明:供应链产品绿色度和定价协调优化不仅有助于制造商和零售商实现共赢,而且有助于制造商为客户提供更好的绿色产品.制造商的谈判能力越强,产品最优绿色度越高,而最优收益共享系数和产品的批发/销售价格则越小.此外,客户对产品绿色度的敏感系数与制造商谈判能力系数的共同升高将会加快最优收益共享系数的降低.研究结论可为制造商产品绿色度和绿色供应链协调决策提供有益的参考.     

零售商占优下的两部定价合同与通道费

本文考虑由单个占优的零售商和单个供应商组成的二级供应链模型.在价格相依的随机需求下,研究分散系统下的批发价格合同与两部定价合同.在一定的条件下得到两种合同中供应链成员的最优决策和利润以及供应链系统的利润.分析表明,当零售商占优时两部定价合同比批发价格合同更有效.这在一定程度上说明当前零售业中收取通道费的合理性.     

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP ——In memory of Professor Sun Yongsheng

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.     

Boundedness for commutators of multipliers on Hardy type spaces

In this paper, we study the commutators generalized by multipliers and a BMO function. Under some assumptions, we establish its boundedness properties from certain atomic Hardy space Hb^p（R^n） into the Lebesgue space L^p with p 〈 1.     

A unified approach to certain problems of best local approximation

In this paper we study best local quasi-rational approximation and best local approximation from finite dimensional subspaces of vectorial functions of several variables. Our approach extends and unifies several problems concerning best local multi-point approximation in different norms.     

Towards Excellence in Science Chinese Academy of Sciences

<正>May 26,2014,Beijing Science is a human enterprise in the pursuit of knowledge.The scientific revolution that occurred in the 17th Century initiated the advances of modern science.The scientific knowledge system created by     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

<正>August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists     

Bounds for the zeros of polynomials

Let P(z)=∑↓j=0↑n ajx^j be a polynomial of degree n. In this paper we prove a more general result which interalia improves upon the bounds of a class of polynomials. We also prove a result which includes some extensions and generalizations of Enestrǒm-Kakeya theorem.     

Boundedness of commutators related to Marcinkiewicz integrals on hardy type spaces

In this paper, the authors study the boundedness of the operator [μΩ, b], the commutator generated by a function b ∈ Lipβ(Rn)(0 ＜β≤ 1) and the Marcinkiewicz integrals μΩ, on the classical Hardy spaces and the Herz-type Hardy spaces in the case Ω∈ Lipα(Sn-1)(0 ＜α≤ 1).     

Generalization of the interaction between Haar approximation and polynomial operators to higher order methods

In applications it is useful to compute the local average empirical statistics on u. A very simple relation exists when of a function f（u） of an input u from the local averages are given by a Haar approximation. The question is to know if it holds for higher order approximation methods. To do so, it is necessary to use approximate product operators defined over linear approximation spaces. These products are characterized by a Strang and Fix like condition. An explicit construction of these product operators is exhibited for piecewise polynomial functions, using Hermite interpolation. The averaging relation which holds for the Haar approximation is then recovered when the product is defined by a two point Hermite interpolation.     

Jacobi polynomials used to invert the laplace transform

Given the Laplace transform F(s) of a function f(t), we develop a new algorithm to find an approximation to f(t) by the use of the classical Jacobi polynomials. The main contribution of our work is the development of a new and very effective method to determine the coefficients in the finite series expansion that approximation f(t) in terms of Jacobi polynomials. Some numerical examples are illustrated.