Abstract In this paper, the microstrip line fed wide band triangular patch antenna with rectangular slot has been designed and simulated by using ADS software in order to study the effects of various parameters on the antenna’s radiation characteristics. Also, two, four, eight and sixteen elements of triangular microstrip patch antenna array has been discussed. The effect on the antenna parameters... In this paper, the microstrip line fed wide band triangular patch antenna with rectangular slot has been designed and simulated by using ADS software in order to study the effects of various parameters on the antenna’s radiation characteristics. Also, two, four, eight and sixteen elements of triangular microstrip patch antenna array has been discussed. The effect on the antenna parameters due to increase in the antenna elements (array) is clearly observed on antenna bandwidth. This type of antenna can be used for Astronomy and Remote Sensing applications. Read More Read Less

Abstract In this paper, we study the dynamic service composition becomes a decision problem on which component services should be selected under the E2E QoS constraints. This problem is modeled is a nonlinear optimization problem under several constraints. We have two approaches: local selection is an event strategy with polynomial time complexity but cannot handle global constraints and the traditional global... In this paper, we study the dynamic service composition becomes a decision problem on which component services should be selected under the E2E QoS constraints. This problem is modeled is a nonlinear optimization problem under several constraints. We have two approaches: local selection is an event strategy with polynomial time complexity but cannot handle global constraints and the traditional global selection approach based on integer linear programming can handle global constraints, but its poor performance renders it inappropriate for practical applications with dynamic requirements. To overcome this disadvantage, we proposed a novel Min-Max Ant System algorithm with the utilites heuristic information to search the global approximate optimal. The experiment results show that our algorithm is efficiency and feasibility more than the recently proposed related algorithms. Read More Read Less

Abstract Historically, the field of image processing grew from electrical engineering as an extension of the signal processing branch, whereas the discipline of computer science was largely responsible for developments in computer vision. An image processing operation typically define a new image in terms of existing image. On the other hand, computer vision deals with meaningful representation of an environment for decision... Historically, the field of image processing grew from electrical engineering as an extension of the signal processing branch, whereas the discipline of computer science was largely responsible for developments in computer vision. An image processing operation typically define a new image in terms of existing image. On the other hand, computer vision deals with meaningful representation of an environment for decision making. Shape from Focus (SFF) is the combination of above mentioned (both) schemes for controlled environments such as automation and robot path planning in restricted environment. Different techniques have been used in SFF to retrieve spatial information from a sequence of images. Traditional SFF techniques are unable to perform satisfactorily on images which contain high contrast variation between different regions, shadows, defocus points, noise, and oriented edges. Mainly, SFF techniques utilize neighborhood information to deal with noisy gradient, and abrupt depth discontinuities. The neighborhood support and gradient detection complicate focus measure computation for oriented intensity variation. Various techniques have been proposed which range both in spatial and frequency domains to overcome inherent limitations and problems of depth estimation. In this paper, we present a brief overview of various methods along with critical evaluation, and recommendations for future work. Read More Read Less