In the paper is presented the brief history of research conducted in Poland (at AGH University) in the area of image processing, analysis and recognition. The history is connected with changes of the technology used f...
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This paper analyzes the generalized predictive control law under constraints on the input, output or other auxiliary signals that depend linearly on the system variables. These constraints are formulated as sets of li...
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This paper analyzes the generalized predictive control law under constraints on the input, output or other auxiliary signals that depend linearly on the system variables. These constraints are formulated as sets of linear equalities or inequalities;the control sequence is therefore elaborated based on parametric optimization problem. The feasibility issues are related on one hand to the wellposedness condition and on the other hand to the compatibility with the set-point constraints. The prediction of the feasibility is of great interest from this point of view and necessary feasibility conditions are presented.
The paper aims to present a comparative study related to different approaches regarding prediction of multi-variable physical data. Data are provided by natural phenomena with geographical distribution (especially eco...
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The paper aims to present a comparative study related to different approaches regarding prediction of multi-variable physical data. Data are provided by natural phenomena with geographical distribution (especially ecological and meteorological) and are stored as blocks of time series. Simulations have shown that the prediction accuracy of data increased with their correlation. Three modeling approaches of data are considered: MIMO-ARMA type, a state representation of Kalman-Bucy type and MIMO-ARMAX type. The performance of modeling and prediction algorithms is demonstrated on a meteorological case study.
Current advances in information technology and electronics allowed the passage from the classic centralized control approach to a fully decentralized control approach. In this context the paper proposes a new control ...
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Current advances in information technology and electronics allowed the passage from the classic centralized control approach to a fully decentralized control approach. In this context the paper proposes a new control concept in which the commands from a superior control levels are sent as recommendations and low level entities communicate between them in order to solve and optimize the task given as a recommendation. After introducing the control concept, an implementation aiming at production scheduling using a holonic approach is illustrated. The implementation was done on a job shop type production system containing multiple networked workstations.
An important issue in the analysis of two-dimensional electrophoresis images is the detection and quantification of protein spots. The main challenges in the segmentation of 2DGE images are to separate overlapping pro...
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A new methodology for the design of control systems for real time applications is presented. It is proposed to have a first stage of assisted design of nominal systems with simulation based verification of the achieve...
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ISBN:
(纸本)9783902661913
A new methodology for the design of control systems for real time applications is presented. It is proposed to have a first stage of assisted design of nominal systems with simulation based verification of the achieved performances. The control algorithm will then be improved by robustification to reproduce as good as possible the performances obtained in simulation on the real time process. Finally, a supervisor is implemented to optimize the thermo-energetic process and to compute the best choice for the reference signals.
The Semantic Web is a development of the World Wide Web in which the meaning (semantics) of information web is defined, making it possible for the web to "understand" and satisfy the requests of people. Sema...
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The Semantic Web is a development of the World Wide Web in which the meaning (semantics) of information web is defined, making it possible for the web to "understand" and satisfy the requests of people. Semantic technologies are being added to enterprise solutions to accommodate new techniques for discovering relationships across different databases, business applications and Web services. In this paper, we present an architectural model for a distributed software tool which combines the use of Semantic Web mechanisms with database metadata and data warehousing mechanisms. If the benefits of the Semantic Web concept are combined with a powerful database server and with the strong points of a distributed application, then the information management will be improved.
The paper presents a software application for modeling, simulation and analysis of urban traffic networks behavior in different functioning contexts. A module of control techniques, based on different approaches (as g...
The paper presents a software application for modeling, simulation and analysis of urban traffic networks behavior in different functioning contexts. A module of control techniques, based on different approaches (as genetic algorithms, fuzzy and neural networks) allows the platform to provide decision support for context-based traffic control in large urban areas. The application is based on a three-layered control architecture: the basic level monitoring and controlling junctions, the middle one ensuring smooth functioning of sub-networks, by the coordination of interconnected junctions and the top level ensuring a globally optimized functioning of the system.
Failure detection is a fundamental building block for ensuring fault tolerance in large scale distributed Systems. In this paper we present an innovative Solution to this problem. The approach is based on adaptive, de...
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ISBN:
(纸本)9781424459179;9780769539676
Failure detection is a fundamental building block for ensuring fault tolerance in large scale distributed Systems. In this paper we present an innovative Solution to this problem. The approach is based on adaptive, decentralized failure detectors, capable of working asynchronous and independent on the application flow. The proposed failure detectors are based on clustering, the use of a gossip-based algorithm for detection at local level and the use of a hierarchical structure among Clusters of detectors along which traffic is channeled. In this we present result proving that the system is able to scale to a large number of nodes, while still considering the QoS requirements of both applications and resources, and it includes the fault tolerance and system orchestration mechanisms, added in order to asses the reliability and availability of distributed Systems in an autonomic manner.
Low-Density Parity-Check codes are one of the best modern error-correcting codes due to their excellent error-correcting performance and highly parallel decoding scheme. This article concerns the hardware iterative de...
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Low-Density Parity-Check codes are one of the best modern error-correcting codes due to their excellent error-correcting performance and highly parallel decoding scheme. This article concerns the hardware iterative decoder for a subclass of LDPC codes that are implementation oriented, known also as Architecture Aware LDPC. The parameterizable decoder has been designed in the form of synthesizable VHDL description. Implementation in Xilinx FPGA devices achieves throughput nearly 100Mb/s. Significant part of the decoder area is occupied by Configurable Interconnection Network. The network consists of a set of multiplexers that propagate the data from memory to the computation units. Behavioral description of the interconnection network gives quite poor synthesis results: decoder area is large and exponentially dependent on the number of inputs / outputs. Instead of straightforward behavioral description, the switching network can be described structurally making use of ideas known from theory of telecommunication interconnection networks: Benes or Banyan switches. In this article 1 present in detail the interconnection network implementation based on Banyan switch with additional multiplexer stage to enable non-power-of-2 numbers of outputs. Comparison of synthesis results for the network obtained by synthesis of behavioral description as well as the Banyan structural description shows significant decrease of decoder area in the second case.
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