模糊需求与模糊提前期易逝品供应链渠道协调的数量折扣契约研究

对LR型模糊变量,基于可信性理论,给出了其期望值计算式。针对模糊市场需求及模糊生产提前期,考虑了由一个制造商和一个分销商组成的易逝品两级供应链系统,分别建立了无数量折扣分散决策与集中决策模型。构建了一类新的数量折扣形式,并研究了其在分散决策下如何制定数量折扣,改善供应链服务水平。     

模糊需求下基于收益共享三级供应链协调研究

供应链内各企业的协调问题是供应链管理的核心问题。针对一个由供应商--制造商--零售商构成的三层供应链,在考虑市场需求为模糊变量的情况下,通过不确定理论分别建立了基于可信度分布的集成供应链模型和收益共享契约模型,并求出最优策略,进而验证结果的正确性。结果表明,零售商以及制造商的最优订购量在模糊需求中心点的左、右浮动。此外,不同的收益分配系数对应不同的批发价格策略;通过选取适当的收益分配系数可以实现供应链各成员之间的完美协调。     

Distributed optimization with closed convex set for multi-agent networks over directed graphs

In this paper, a distributed projection algorithm based on the subgradient method is presented to solve the distributed optimization problem with a constrained set over a directed multi-agent network, where the designed protocol is scaled by the left eigenvector associated with the weighted adjacency matrix. By using the property of the projection operation and nonnegative almost supermartingales, we give the convergence analysis of our algorithm and show that the optimal solution is the ultimate consensus state of all agents to be reached. A numerical simulation for a specific optimization problem is given to verify the effectiveness of our algorithm.     

模糊需求下三级闭环供应链协调的收入共享契约研究

闭环供应链中往往会产生正反两方向的"双重边际化效应",造成供应链系统效率的损失。研究了一个由制造商、零售商和第三方回收商组成的三级闭环供应链系统在模糊需求环境下的协调机制,分析了三方在分散决策和集中决策两种情形下的决策过程,并给出收入共享契约机制下的决策模型。最后通过一个算例分析表明,模糊需求环境下,收入共享契约机制可以有效协调闭环供应链中各方利润,并使供应链系统的总利润达到集中决策时的水平。     

The role of temporal coordination for the fuzzy front-end of innovation in virtual teams

In this paper, we study the role of temporal coordination in managing the early stages of innovation (aka fuzzy front-end) in the context of virtual teams. Following a comparative case study approach, we detail the role of temporal coordination through the study of two contrasting virtual teams—one with a 24-h lifespan, and one with a five-month lifespan—from two Industry-Academia collaboration projects. Our approach was longitudinal capturing virtual team activities from start to end of each project, and involved multiple data collection methods, including observations and interviews. The findings reveal that the virtual team lifespan influences the type of temporal coordination that emerges. In virtual teams with short lifespans, tight coordination with frequent communication can help to reduce the uncertainty characterizing the fuzzy front-end. On the other hand, in virtual teams with longer lifespans, loose coordination allows dispersed members to work simultaneously on different, complementary aspects of the task at hand. These findings extend scholarly understanding around how innovation activities are coordinated in technology-mediated environments, such as virtual teams. Finally, we discuss theoretical and managerial implications.     

Bond graphs and linear graphs

Bond graphs have proven to be useful in modeling a wide variety of physical systems where multiports are needed to represent coupling phenomena. Here we show the relationship between bond graphs and more conventional notations utilizing connection N-ports and system graphs. This provides a rigorous foundation for bond graph manipulations and highlights certain difficulties with sign conventions and casual assignments that arise when junction structure loops are present.     

Distributed fuzzy learning sliding mode cooperative control for non-affine nonlinear multi-missile guidance systems via a prescribed performance observer

This paper focuses on the distributed fuzzy learning sliding mode cooperative control issue for non-affine nonlinear multi-missile guidance systems. The dynamics of each follower is non-affine form with unknown lumped factor. To estimate the unknown lumped factor, a generalized fuzzy hyperbolic model (GFHM) based prescribed performance observer (PPO) is proposed. Different from the traditional disturbance observers, a residual set of error transient behavior is incorporated additionally so that the peak phenomenon can be avoided. Meanwhile, an auxiliary system is employed to convert the system of each follower to augmented affine form. Then, a distributed fuzzy learning sliding mode cooperative control approach is designed which consists of two parts. The adaptive sliding mode control (SMC) part is designed to force the states to move along the predefined integral sliding surface. For the equivalent sliding dynamics, the distributed optimal control part with GFHM is developed to minimize the cooperative performance function. Thus, the stability and the optimality of the closed-loop system are guaranteed synchronously. Finally, all signals of closed-loop system are rigorously proved bounded and the multi-missile cooperative guidance scenario is applied to verify the effectiveness of proposed method.     

Incentive feedback Stackelberg strategy for stochastic systems with state-dependent noise

This paper designs an incentive strategy for a class of stochastic Stackelberg games in finite horizon and infinite horizon, respectively. The obtained incentive Stackelberg strategy works well in the sense that the leader will get his desired solution in the end. Different from the existing works, the state-dependent noise is considered in the design of the incentive Stackelberg strategy. Moreover, the mean-square stabilization can be guaranteed by the follower. The algorithm procedure is put forward to obtain effectively the incentive feedback Stackelberg strategy in infinite horizon. Finally, two examples are given to shed light on the effectiveness of the proposed algorithm procedure.     

基于DEA的电能-环境协调发展评价研究

随着电力市场化改革进程的深入,如何科学地评价电能、环境的协调度,进而采取相应的措施是当前进一步深化改革的关键环节.本研究运用系统协调理论,通过对电能、环境二者的协调关系的分析.建立了电能、环境协调度评估指标体系.基于数据包络分析,以统计年鉴数据为基本依据,对我国西部电能-环境系统协调度进行了量化评估研究,得出科学合理的结论,并提出了相应的政策思路及建议.     

Rendezvous problem of multiple linear uncertain systems under state-dependent dynamic networks

This paper studies the rendezvous problem for a class of linear systems with uncertain parameters and external disturbances under the state-dependent dynamic network, which is also called rendezvous network here. By combining potential function technique, distributed internal model design and adaptive control technique, a distributed adaptive state feedback control law is proposed to solve the rendezvous problem by completing the tasks of maintaining the connectivity of the rendezvous network, achieving asymptotic tracking, rejecting unknown external disturbances as well as handling uncertain parameters in the system dynamics, the leader system and the exosystem simultaneously.     

Finite-time stabilization of nonlinear systems via impulsive control with state-dependent delay

This paper focuses on the issue of finite-time stability for a general form of nonlinear systems subject to state-dependent delayed impulsive controller. Based on the Lyapunov theory and the impulsive control theory, sufficient conditions for finite-time stability (FTS) and finite-time contractive stability (FTCS) are obtained. Additionally, we apply theoretical results to finite-time synchronization of chaotic systems and design the effective state-dependent delayed impulsive controllers in terms of techniques of linear matrix inequality (LMI). Finally, we present two numerical examples of finite-time synchronization of cellular neural networks and Chua’s circuit to verify the effectiveness of our results.     

分布式计算中的中间件研究

首先阐述了中间件的重要性及其概念，然后介绍了三种主流中间件技术，并对这三种中间件技术做了比较和分析，最后探讨了下一代中间件技术。     

多层分布式信息管理之研究

多层分布式信息管理正在得到越来越广泛的应用。本文分析了它的发展现状，提出了一个基于Windows平台组件管理器模式的多层分布式模型。理论分析和初步原型实验证明了方法的有效性。     

Event-triggered gain-scheduling dissipative synchronization control for switched neural networks under state-dependent switching

The dissipative synchronization problem of delayed Markov jump switched neural networks (MJSNNs) under state-dependent switching by the event-triggered gain-scheduling control scheme is studied in this paper. By the introduction of a Markov jump model, which is used to depict the random variation wherein the connection of MJSNNs, the issues we study can take more generality. Via constructing suitable Lyapunov–Krasovskii functionals (LKFs) and applying some matrix inequality scaling methods, sufficient conditions for dissipative synchronization of delayed MJSNN are established. According to such criteria, the event-triggered gain-scheduling control scheme is adopted to design a controller with less terminal communication costs. Finally, a numerical example is given to demonstrate the effectiveness of the proposed method.     

一种基于MAS协调的组织任务实施过程模型

本文运用多agent系统的任务分解、资源配置及agent之间的活动协调等思想和方法,分析一般的组织任务实施活动过程,形成面向任务对象的组织活动过程结构模型,为动态环境下组织任务的顺利实施和完成提供理论支持。     

状态依赖时滞型微分方程正周期解的存在性

本文利用Krasnoselskii不动点定理,考虑了状态依赖时滞性微分方程x′(t) = &;#8722;A(t, x(t))x(t) + B(x(t))F(x(t &;#8722;  (t, x(t))))正周期解的存在性, 得到了该方程存在与不存在正周期解的充分条件.     

农业产业化协调机制探析

在分析农业产业化组织结构的基础上,通过重新构建农业产业化的组织模式,在各经营主体之间、各环节之间建立科学有效的协调机制,以保证农业专业化生产、一体化经营、社会化服务和企业化管理的产业化经营方式和产业组织形式的顺利实施。     

Energy analysis of a class of state-dependent switched systems with all unstable subsystems

In this paper, we investigate the stability and periodicity of a class of state-dependent switched systems with all unstable subsystems by means of energy analysis. We firstly transform the unstable subsystems reversibly into the form of second order mechanical systems, and then construct energy functions by calculating the sum of kinetic and potential energies of each subsystem. After that, two switching lines, derived from the lines with the largest and smallest energy drops, make the stable phase trajectory approach to the equilibrium point at the fastest speed. In addition, we explore possible dynamic behaviors of the switched system under a pair of switching line including asymptotic stability, instability and periodicity. Furthermore, based on the bisection method and nested intervals theorem, we design a state-dependent switching law, which makes the switched system periodic initiated from a stable switching law. Finally, numerical simulation examples are provided to illustrate the effectiveness and less conservativeness of the proposed method with practical significance.     

边传递图上的最快混合马氏过程

考虑加权连通图上的简单连续时间马氏过程,每条边上赋权为马氏过程的转移速率,使得马氏过程混合时间最短的赋权问题称之为最快混合马氏过程问题(FMMP).我们证明FMMP在图自同构群的不变点集合中取到最优,并且在边传递图中解析地得到了最优解.