ABSTRACT This paper deals with a comparison of centralized and decentralized approaches to obtain an optimal controller for discrete manufacturing systems. It is based on a modular modeling of the plant to avoid combinatory explosion found in centralized structure and a synthesis algorithm. From the local Plant Elements, local constraints are defined to build local supervisors. Local constraint...

Empirical support for the assumption that cliques are major determinants of reputational influence derives largely from the frequent finding that organizations which claimed that their cliques’ connections are influential had an increased likelihood of becoming influential themselves. It is suggested that the strong and consistent connection in cliques is at least partially responsible for the ...

the proliferation of information and communications technology (ict) along with the incremental growth in the use of cloud services, enterprise network and data center technologies in recent years, have caused unprecedented expansion of computer networks. however, the existing network architecture was not well designed to meet the requirements of today's needs. one of the most important pr...

doing centralized and coherent activities between governmental agencies is essential at any level. creating suitable institutional structure for appropriate solutions of policy problem in natural resources at multiple levels is possible using application of network governance. the aim of this paper is institutional network analysis with co-management of zagros dry forests in regional (county) l...

although the subject of amending was reffered to in the draft constitution ,but due to revolution time circumstances,this principle was not approved.ten years of islamic state (1358 – 68 ) revealed some problems of the constitution like multiple decision making centers and existence of parallel organisations at administrative, legislative and judicial levels. after the war and considering appro...

We consider a centralized network model representing a teleprocessing or a centralized computer communication network. The network is topologically described by a tree structure. A single central node represents a data-processing center, while the other nodes correspond to remote terminals. A maximal average message delay value is prescribed. A cost function is assumed to incorporate a term rep...

This paper presents a procedure for maintaining a 2D-Euclidean Minimum Spanning Tree for a set of n autonomous kinetic robots having no central supervision. The proposed procedure is based on the Kinetic data structure framework and the well known fact that the edges of the minimum spanning tree for a given set of points in the 2D-Euclidean domain are contained in the edges of its Delaunay tria...

A wind energy conversion system (WECS) including a variable wind turbine in grid-connected mode is considered to control. In this paper, each component of WECS model is systematically presented and then the integrated overall model is validated.Regarding to nonlinear nature of WECS and the complex system structure as multiple-input multiple-output (MIMO), it is difficult to find a proper contro...

This paper talks about a decentralized approach for diagnosis of discrete event systems based on the plant decomposition. A decentralized structure is used to avoid state space explosion found in centralized structure or decentralized structure with composition step. From plant models, all possible faults are identified to construct abnormal behavior models called diagnosers. Originality of thi...

The blackboard is a centralized global data structure, often partitioned in a hierarchical manner, used to represent the problem domain. The blackboard is also used to allow inter-knowledge source communication and acts as a shared memory visible to all of the knowledge sources. A knowledge source is a highly specialized, highly independent process that takes inputs from the blackboard data str...