ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437120

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

This paper explores the inherent parallelism in different steps of three layer channel routing algorithm based on merging method in Shared Memory SIMD computer using CRCW model. Overall algorithm is structured as set of sequential steps, implemented by calling several procedures, namely finding longest path of a directed graph, finding minimum or maximum value among a set, merging two nodes in a directed graph, searching a graph for a particular node. Studying the inherent parallelism, each procedure is restructured for parallel operation on SIMD model. The speed-up and complexity analysis is performed at each step considering unbounded parallelism. The overall complexity of this algorithm reduces fromO(n2)toO(n* logn) usingO(n)processors fornnets.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437121

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

Control algorithms for optimal derivation strategy with fuzzy reasoning in knowledge-based systems are presented. Optimal derivation strategy is established in terms of antecedent-consequent relationship between a given initial state to a given goal state. The optimal strategy leads to the highest fuzzy value to the goal state. One algorithm is based on dynamic programming principle employed in a branch-and-bound paradigm. Other one employs a shortest-path framework in a fuzzy environment. The dynamic behaviour of the rule-based system is represented by fuzzy production rules. The states of the system are assumed to be represented by fuzzy linguistic expressions. The antecedent-consequent relationship of states in the system is determined bymodus ponenin fuzzy environment. The performance of the proposed algorithms is illustrated with an example.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437122

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

We propose an alternative approach to approximate reasoning which is totally different from the one developed by Zadeh. The present approach is independent of the choice of the translating rule of any implication operators. We use the concept of subjective probability instead of fuzzy membership function which has a strong resemblance to subjective probability.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437123

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

The detection and diagnosis of faults occurring in local subsystems are considered as abrupt changes of unknown magnitudes at unknown times, using the local information alone. Because of limited information the application of the centralized fault detection methods in general is not straight forward to decentralized fault detection and requires a new approach. Here we show that, using a projection operator to suppress the information due to the unknown interactions of other subsystems on the residuals of the local systems, the application of the centralized generalized likelihood ratio test for fault detection is straight forward.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437124

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

This paper presents a simple, linear and robust filter for estimating the magnitudes of sinusoids of known frequencies embedded in an unknown measurement noise, which can be a mixture of both stochastic and deterministic signals. The algorithm is simple in comparison to Kalman filtering and is superior to the one-cycle Fourier transform algorithm, and can be easily implemented for real time measurements, when there is abnormal changes in the signal. Some typical case studies like the power network containing rectifier loads, thyristor controller reactors, harmonic rich non-linear loads, transformer circuits have been conducted. The results show the effectiveness of the filter in extracting the necessary signal components when noise is present along with the signal.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437125

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

A simple self-tuner algorithm based on the tuning of the proportional band of a conventional Proportional Integral mode action is proposed. The algorithm, based on intuitive reasoning as adopted by process experts is simpler than many of its type specially from the viewpoint of implementation on a 8 or 16-bit microprocessor. It has been tested in a stable second order process model as also in an actual second order thermal process. Test results show that the proposed algorithm has an edge over its conventional discrete counterpart even when the latter is perfectly tuned.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437126

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

The paper presents method of evaluation of absolute values of equipotential boundaries of eccentric coaxial line using two types of conformal transformation. Cotangent hyperbolic transformation with appropriate normalizing constant transforms the line to a parallel plate configuration. Bilinear transformation expressed in terms of mutually inverse points transforms the same structure to a coaxial configuration. Numerical data on capacitance and charge distribution is presented.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437127

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

While many image compression schemes have come up in recent years, a new scheme using two-dimensional interpolation for satellite images is presented in this paper. This scheme is very useful for onboard application since it achieves reasonable compression with very simple encoding and decoding operation. Also the scheme, namely Block Interpolative Coding, has the facility for fixing the required compression, quality and distortion. Simulation results on Indian remote sensing satellite images have been presented.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437128

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

A new approach to the coding of speech signals is presented. Called the Block Adaptive Coder, it reduces the coder complexity and computational burden and increases the transmission rate of the data. In the classical Adaptive Predictive Coding methods, the predictor coefficients along with the residual signal, are to be transmitted to the receiver. In the present work, this residual signal is not transmitted, which in turn reduces the coder complexity at the transmitter. But, the first few sample values have to be transmitted every block. The predictor is updated, if necessary, based on the correlation between the input samples. The technique is verified by simulation and the results prove the simplicity of the coder as well as the reduction in computation.

ISSN:0377-2063    

DOI:10.1080/03772063.1993.11437129

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor