Time domain analysis of electromagnetic wave propagation is required for design and characterizat... more Time domain analysis of electromagnetic wave propagation is required for design and characterization of many optical and microwave devices. The FDTD method is one of the most widely used time domain methods for analysing electromagnetic scattering and radiation problems. However, due to the use of the Finite Difference grid, this method suffers from higher numerical dispersion and inaccurate discretisation due to staircasing at slanted and curve edges. The Finite Element (FE)-based meshing technique can discretize the computational domain offering a better approximation even when using a small number of elements. Some of the FE-based approaches have considered either an implicit solution, higher order elements, the solution of a large matrix or matrix lumping, all of which require more time and memory to solve the same problem or reduce the accuracy. This paper presents a new FE-based method which uses a perforated mesh system to solve Maxwell's equations with linear elements. The perforated mesh reduces the requirement on memory and computational time to less than half of that compared to other FE-based methods. This paper also shows a very large improvement in the numerical dispersion over the FDTD method when the proposed method is used with an equilateral triangular mesh.
ABSTRACT This paper presents a recognition algorithm for printed Bangla text digits where the rec... more ABSTRACT This paper presents a recognition algorithm for printed Bangla text digits where the recognition of a digit is independent of its position, orientation and size. The image containing Bangla number is preprocessed in several steps which include edge detection in ...
Abstract Time Slot Interchange and Signal Separator (TSISS) network was introduced to reduce the... more Abstract Time Slot Interchange and Signal Separator (TSISS) network was introduced to reduce the time slot requirement of TST architecture. In the switching algorithm of the TSISS network, an ad-jacency matrix was formed and Breath-first search (BFS) or Depth-first ...
This work presents a new approach to detecting the scene change in the successive capture of phot... more This work presents a new approach to detecting the scene change in the successive capture of photographs of a place within equal time interval. This method is based on a gray level histogram of every image. In this method the histogram of an image is processed to modify it for ...
With the increasing demand for telecommunications, the demand for faster and more and more effici... more With the increasing demand for telecommunications, the demand for faster and more and more efficient switching is increasing day by day. As Time switches ensure maximum utilization of resources using a technique called time divi-sion multiplexing (TDM), they are always ...
Abstract: Now a day Artificial Neural Network (ANN) has become one of the most prominent concepts... more Abstract: Now a day Artificial Neural Network (ANN) has become one of the most prominent concepts in the field of Artificial Intelligence. ANN has already been applied in the thousands of real life applications. In the arena of classification problem ANN is used massively. But the key ...
Time domain analysis of electromagnetic wave propagation is required for design and characterizat... more Time domain analysis of electromagnetic wave propagation is required for design and characterization of many optical and microwave devices. The FDTD method is one of the most widely used time domain methods for analysing electromagnetic scattering and radiation problems. However, due to the use of the Finite Difference grid, this method suffers from higher numerical dispersion and inaccurate discretisation due to staircasing at slanted and curve edges. The Finite Element (FE)-based meshing technique can discretize the computational domain offering a better approximation even when using a small number of elements. Some of the FE-based approaches have considered either an implicit solution, higher order elements, the solution of a large matrix or matrix lumping, all of which require more time and memory to solve the same problem or reduce the accuracy. This paper presents a new FE-based method which uses a perforated mesh system to solve Maxwell's equations with linear elements. The perforated mesh reduces the requirement on memory and computational time to less than half of that compared to other FE-based methods. This paper also shows a very large improvement in the numerical dispersion over the FDTD method when the proposed method is used with an equilateral triangular mesh.
ABSTRACT This paper presents a recognition algorithm for printed Bangla text digits where the rec... more ABSTRACT This paper presents a recognition algorithm for printed Bangla text digits where the recognition of a digit is independent of its position, orientation and size. The image containing Bangla number is preprocessed in several steps which include edge detection in ...
Abstract Time Slot Interchange and Signal Separator (TSISS) network was introduced to reduce the... more Abstract Time Slot Interchange and Signal Separator (TSISS) network was introduced to reduce the time slot requirement of TST architecture. In the switching algorithm of the TSISS network, an ad-jacency matrix was formed and Breath-first search (BFS) or Depth-first ...
This work presents a new approach to detecting the scene change in the successive capture of phot... more This work presents a new approach to detecting the scene change in the successive capture of photographs of a place within equal time interval. This method is based on a gray level histogram of every image. In this method the histogram of an image is processed to modify it for ...
With the increasing demand for telecommunications, the demand for faster and more and more effici... more With the increasing demand for telecommunications, the demand for faster and more and more efficient switching is increasing day by day. As Time switches ensure maximum utilization of resources using a technique called time divi-sion multiplexing (TDM), they are always ...
Abstract: Now a day Artificial Neural Network (ANN) has become one of the most prominent concepts... more Abstract: Now a day Artificial Neural Network (ANN) has become one of the most prominent concepts in the field of Artificial Intelligence. ANN has already been applied in the thousands of real life applications. In the arena of classification problem ANN is used massively. But the key ...
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Papers by Raiyan Kabir