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 20 of 32 for “"energy approach"”.
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Mountain top eco-industrial park: An eco-industrial, renewable energy approach for industrial park development
… to the region. The site is at the center of an `energy' complex: Mount Storm Power Plant and former surface mines. Extractive industries and energy production will be a theme within the design project. An Eco-Industrial Park model will be applied in looking to a sustainable energy future for the …
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On-Line Transient Stability Analysis of a Multi-Machine Power System Using the Energy Approach
… for transient stability analysis using the energy approach [1] and the Phasor Measurement Units (PMUs). The originality of this new method results from a combination of a prediction of the post-fault trajectory based on the PMUs and the Transient Energy Function of a multimachine system. …
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Experimental evaluation of monotonic and cyclic fracture behavior using disk-shaped compact tension test and released energy approach
… compact tension (DC(T)) test and a released-energy based approach. The standard DC(T) test was revised to facilitate both monotonic and cyclic loading tests, including some modifications of the test geometry and testing modes. The research was motivated to explore possible extensions of the …
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Solutions to Passageways Detection in Natural Foliage with Biomimetic Sonar Robot
… presents the performance of a conventional energy approach and a deep-learning approach in the classification of echoes from foliage and gap. The deep-learning approach has better foliage versus passageway classification accuracy than the energy approach in both experiments, and it also …
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"Shear Lag" em estruturas tubulares de paredes delgadas
… The analytical equations are developed within an energy approach where shear strains and shear lag effects are considered. Explicit expressions for transverse deflections and stesses are given for cantilever box beams. For tubular sections of more general geometries, like bridge sections, …
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Studies on the Motion of Continuous Viscoelastic Rotors
… this Euler beam rotating shaft utilizes the work-energy approach. It is assumed that constant torque is applied at the shaft ends which are fixed in long ideal bearings. The derived field equations are three coupled, higher order, linear, partial differential equations. The coupling is effected …
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Prediction of snap-through instability under harmonic excitation
… oscillations. The method is based on the total energy approach which limits the system responses within a region bounded by a critical total energy in the phase space. Three one-degree-of-freedom nonlinear systems are investigated. Their governing ordinary differential equations are associated …
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A Finite Element Framework for the Thermal Analysis of Solids and Fluids
The lack of a unified continuum-mechanics approach for predicting the thermal displacements of solids and fluids demonstrates the need for a consistent and unified formulation for the continua that include both solids and fluids. In conventional finite-element formulations, volume changes of solids …
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Hypernasal Speech Analysis via Emperical Mode Decomposition and the Teager-Kasiser Energy Operator
… newer DSP methods that employ group delay or energy separation overcome some of these problems, but have their own issues such as possible mode mixing, noise, and the aforementioned wideband problem. However, initial investigations into energy separation methods show promise as long as these …
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Determination of the complex modulus of a solid propellant and random vibration analysis of the layered viscoelastic cylinders with finite element method
… element method, structural dynamics, strain energy approach, and random vibration analysis concepts. The method is a more powerful technique capable of treating sophisticated random vibration problems with complicated geometry, nonhomogeneous materials, and frequency-dependent stiffness and …
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A Generalized Two-Dimensional Model to Reconstruct the Impact Phase in Automobile Collisions
… with a relationship between crush geometry and energy loss. Because each method requires very different inputs, the literature would have us believe that both methods are different. We will show that both methods are derived using the same fundamental physical principles and for any given …
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Factors Influencing the Post-Earthquake Shear Strength
… mineralogical composition, and accumulated energy on the cyclic behavior, post-cyclic shear strength and the degradation in shear strength due to cyclic loading in normally consolidated clays. Seventeen soil samples prepared in the laboratory from kaolinite, montmorillonite, and quartz were …
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Elastic and inelastic analysis of panel collapse by stiffener buckling
… are included. The method uses the Rayleigh-Ritz approach. Based on an assumed strain distribution, a displacement field is obtained for the tripping model, and the total potential energy functional is then derived. The strain distribution assumptions coincide with van der Neut's assumption. …
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Fatigue-fracture relation on asphalt concrete mixtures
… failure and a new fatigue criterion based on an energy approach known as the plateau value (PV). Similarly, a disk-shaped compact tension DC(T) fracture test was used to obtain fracture energy parameters, including: fracture strength, pre-peak fracture energy, post-peak fracture energy, and total …
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The interaction of periodic surface gravity waves with slowly varying water currents
… then presented in two ways: firstly using a wave energy approach and secondly by introducing the wave action concept. Wave action is more convenient because it is a conserved quantity unlike wave energy. The general equations for two dimensional wave/current interactions are derived and discussed. …
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Laboratory investigation of fatigue endurance limits in asphalt concrete
… identification is based on the phenomenological approach, which relates the number of loading cycles to fatigue failure with applied tensile strain and initial stiffness of material. This study determined the FEL of two HMA mixtures, SP-II (coarse mix) and SP-III (fine mix), using the …
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Properties Model for Aqueous Sodium Chloride Solutions near the Critical Point of Water
Traditional excess Gibbs energy models in terms of temperature, pressure, and concentration become progressively less effective in describing the thermodynamics of aqueous solutions at temperatures above 300 ¢ªC, and are totally inadequate in the critical region of water. This deficiency is due …
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Measuring Energy Efficiency of Water Utilities
… systems worldwide use large amounts of energy to operate. Energy efficiency efforts are relevant because even relatively small gains in efficiency have the potential to bring significant benefits to these utilities in terms of financial savings and enhanced sustainability and resiliency. …
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Analysis, detection and early warning control of dynamic rollover of heavy freight vehicles
… of heavy vehicles is further investigated using energy approach to derive the absolute rollover limits. A number of potential rollover indicators are identified and evaluated for a five-axle tractor semi-trailer combination using the constant velocity three-dimensional vehicle model in terms of …
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Development of new ecological footprint techniques applicable to consumer electronics
… of materials and their overburden. A life cycle energy approach was used to determine the burdens from producing and using a mobile phone. In order to estimate energy requirements for materials for which no data was available, the relationship between abundance and rucksack / overburden values …
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