214 research outputs found
Data analysis tools for 3D dosimetry: the use of CERR as a platform to integrate and compare measurements and treatment planning information
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Topology Optimization Using Hyper Radial Basis Function Network
No full textTopology optimization has been conventionally used in automobile and aerospace industries to produce lightweight structures for minimum compliance or maximum fundamental frequency. Today, topology optimization finds application in solving diverse types of problems ranging from medicine to consumer products. Popular continuum based method SIMP fails to provide global solution due to too many variables involved. In this work, a novel hyper radial basis function network is presented as topology description function. The proposed approach provides drastic reduction in number of design variables involved in topology optimization. This makes the use of heuristic global solution possible. Parallel processing, reanalysis formulation and automatic selection of optimal volume fraction are proposed to speed up analysis. Application to solve minimum compliance, maximum fundamental frequency, compliant mechanisms and optical medical imaging problems are presented. The proposed approach can be easily incorporated with legacy software. The design process is made efficient by speeding up analysis and decreasing the need for human interpretation
A DomainSpecific Text Summarization using a Combination of Statistical and Linguistic Approach
No full textBenchmarking gait models for simulating the influence of body weight unloading on human gait
No full textMechanical Engineerin
Textured back reflectors for thin-film silicon solar cells
No full textThe low conversion efficiency of thin-film silicon solar cells currently prevents them from competing, commercially, with the dominant crystalline silicon technology. The small thickness of the photo-active layer in thin-film silicon solar cells is an advantage for reducing raw material consumption and increasing industrial throughput, but results in poor light absorption at long wavelengths. A textured back reflector is used to increase the absorption of light that would otherwise escape the solar cell. The aim of this project is to fabricate a high-performing back reflector by analysing the influence of its surface texture on the light scattered by it. A structure, called the optical stack, was fabricated on a wide range of random textures to compare the light absorption in a hydrogenated nanocrystalline silicon (nc-Si:H) absorber. The plasmonic absorption at the silver back reflector in the optical stack was observed by 3-D optical modelling, for different surface textures. A qualitative analysis of the absorption in the optical stack and the plasmonic absorption in the back reflector, identified textures that are promising for increasing the light absorption in a nc-Si:H solar cell. Better light scattering and increased short-circuit current density (Jsc), compared to the reference back reflector, was demonstrated using the selected back reflectors.Sustainable Energy TechnologyElectrical Sustainable EnergyElectrical Engineering, Mathematics and Computer Scienc
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