Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"energy spreading"”.
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Iterative Techniques Based on Energy Spreading Transform for Wireless Communications
… iterative signal-detection techniques based on energy spreading transform (EST). Different from the existing iterative methods based on the turbo principle, the proposed schemes are independent of channel coding. EST is an orthonormal that spreads a symbol energy over the symbol block in time …
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Chaotic behaviour of disordered nonlinear lattices
… work we systematically investigate the chaotic energy spreading in prototypical models of disordered nonlinear lattices, the so-called disordered Klein-Gordon (DKG) system, in one (1D) and two (2D) spatial dimensions. The normal modes' exponential localization in 1D and 2D heterogeneous linear …
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Chaotic diffusion in nonlinear Hamiltonian systems
… couplings. The fundamental observation is the spreading of energy for localized initial conditions. Methods of quantifying this spreading behavior are presented, including a new quantity called excitation time. This new quantity allows for a more precise analysis of the spreading than …
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Jet Noise Control by Adjoint-Based Optimization
… terms (body forces, mass sources, and internal energy sources) with compact support near the ""splitter plate."" The noise to be reduced is defined by a space-time integral of the mean square pressure fluctuations on a line parallel to the mixing layer in the acoustic field of the low-speed …
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Study on Bandgap Manipulation and Structural Vibration Control in Sandwich Metastructures
… To achieve vibration attenuation and suppress energy transmission under broadband excitation, a sandwich wave-filtering component integrating load-bearing and wave-filtering functions is proposed, and its core layer is designed through a dynamic-response-based topology optimization method. By …