Particle swarm optimization (PSO) is a population-based stochastic optimization technique, originally developed by Eberhart and Kennedy, inspired by simulation of a social psychological metaphor instead of the surviva...
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This work presents the use of particle swarm optimization (PSO) techniques with the particles' population space based on normative knowledge of cultural algorithms (CA). In this work, the optimal shape design of L...
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Wireless technology gradual growth in the latest years has facilitated it to bridge its applications operated extensively in many types of industry. Wireless sensor network (WSN) technology brings several benefits ove...
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In accordance with Industry 4.0, data should be used for process and/or system integration, including the decision-making process. In this context, this paper aims to relate the process of decision-making with process...
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Clustering is a typical unsupervised learning method for classifying unsupervised data. One of the clustering meth-ods, even-sized clustering based on optimization (ECBO), is a clustering algorithm that imposes a cons...
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During the history of science of computational intelligence, many evolutionary algorithms approaches were proposed having more or less success in solving various optimization problems. In this context, the Particle Sw...
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This paper proposes a method to create a geometric model of anatomically adjusted skull prosthesis to be used in machining. The missing area in a skull bone due a hole can be virtually filled in each tomography slice ...
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ISBN:
(纸本)9780889869219
This paper proposes a method to create a geometric model of anatomically adjusted skull prosthesis to be used in machining. The missing area in a skull bone due a hole can be virtually filled in each tomography slice by an adjusted arc. The idea is to generate the missing information from a criterion based on the curvature of the skull shape. We are proposing the use of an adjusted ellipse on its curvature. If the ellipse is properly adjusted in each computed tomography slice, the arcs that represent the part of missing bone can be reconstructed in 3D. The problem is that many ellipses can be created similarly, and the best solution must be found. For this study we have used AI-based techniques that help in choosing an appropriate solution. It was employed the Particle Swarm Optimization (PSO) algorithm in order to find the best solution for each tomographic slice. Once the solution found for each slice, the area of missing bone can be virtually rebuilt to generate the profile in a CAD system. The process results in a new image, which is adjusted model to the prosthesis anatomical area absent in bone structure.
This paper presents a method for visualization of displacement between the centre of the femoral head and acetabulum cavity centre. The measurement is performed in 3D tomography reconstructed images. The femoral head ...
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ISBN:
(纸本)9780889868656
This paper presents a method for visualization of displacement between the centre of the femoral head and acetabulum cavity centre. The measurement is performed in 3D tomography reconstructed images. The femoral head and acetabulum cavity can be represented by synthetic spheres and can be reconstructed based on the slice information of each bone of the joint. With the two spheres it is possible to measure the degree of the displacement between the centres. This representation gives support to the specialized doctors in their diagnostic of hip subluxation in children with cerebral paralysis, once that this problem causes pain because the acetabulum and femur disengagement. The proposal method is a compilation of some computational techniques of image handling such as bone segmentation using Hough Transform, chain code for reduction of the number of the points, Delaunay triangulation to perform a 3D reconstruction and OpenGL graphic library. A software prototype was constructed to validate the method proposed.
The Permanent Magnet Synchronous Generators (PMSG) was generally used for low speed wind turbines. A skew magnet (rotor) was practically utilized for reducing the starting torque of the PMSG operating at low wind spee...
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