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 519 for “"Superposition"”.
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On the Kirkwood superposition approximation
<p>"When the Kirkwood superposition approximation for the triplet distribution function is used in the Born-Green equation for the pair distribution function of a liquid, the fourth virial coefficient is given incorrectly. In view of this, two suggestions for improving the approximation have been …
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Traveling waves in mode superposition
… This work presents the idea of using mode superposition along with an excitation force model which has traveling wave characteristics. Examples of the implementation of this method are shown. Also, examples where a combination of standing and traveling wave excitation models are used is …
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General superposition strategies and asset allocation
Investors commonly use stopping rules to help them get in and out of their investment positions. Despite their widespread use and support from behavioral finance, there has been little discussion of their impact on portfolio performance in classic portfolio choice theory. In this thesis, I remedy …
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Communication Efficiency: Superposition Strategies and Early Decoding
… of non-orthogonal multiple access through superposition coding is characterized under short-latency constraints. Although superposition coding is capacity-achieving for broadcast channels, practical implementations have not delivered the gains predicted by theory. This work analyzes its …
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On Classification and Superposition Principles for Nonlinear Operators
Made available in DSpace on 2014-12-09T22:17:21Z (GMT). No. of bitstreams: 1 6511801.pdf: 2193662 bytes, checksum: 92e6a4b7687a4fd30bfdd89ffa7c9c83 (MD5) Previous issue date: 1965
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Modulation techniques for data superposition on amplitude-modulated signals
Double-sideband amplitude-modulation is widely used because of its simplicity in transmission and reception, but in a number of applications the inclusion of a data channel has become an additional requirement. An additional data signal, transmitted with a normal AM broadcast signal, can be used by …
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Photographic Practice and the Status of Superposition: Image, Observation, Event
… from a creative interpretation of the status of superposition. Superposition is a term used to describe the status of matter in all its conceivable positions at once, as well as in the physical realm: such as where objects are placed in relation to each other. At a quantum level, invisible matter …
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Using superposition of undamped modes to model non-orthogonally damped systems
… between modes, rendering simple normal mode superposition solutions not sufficiently accurate. The flow-induced vibration of drilling and production risers used in the offshore petroleum industry is an example of such a structure. The uneven distribution of hydrodynamic damping often results …
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Long-term creep modeling of wood using time temperature superposition principle
… from short-term data using the time temperature superposition principle (TTSP) for kiln-dried southern pine loaded in compression parallel-to-grain and exposed to constant environmental conditions (~70°F, ~9%EMC). Short-term accelerated creep (17 hour) and recovery (35 hour) data were collected …
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Investigating and Improving Student Understanding of Superposition in Introductory and Quantum Physics Courses
… to student understanding of the principle of superposition in introductory optics and upper-division quantum mechanics courses. The focus is on the extent to which students are able to relate the mathematical formalism used in physics to real-world phenomena. In particular, the investigation …
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Superposition of graphics on low bit rate video as an aid in teleoperation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Exploration of a superposition and reconciliation based approach to cell-centered Lagrangian hydrodynamic methods
… hypervelocity deformation. This study explored a superposition and reconciliation based approach using cell-centered Lagrangian hydro methods. The reconciliation forces that are not explicitly calculated for mesh movement were analyzed on an existing hydrocode by Pierre-Henri Maire (PHM) and a …
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Hierarchical modeling of laminated composite plates using variable kinematic finite elements and mesh superposition
… used at the mesh level in a finite element mesh superposition scheme. In this application of the finite element mesh superposition technique. the variable kinematic elements are used to form the independent, local, overlay meshes that can be superimposed on a pre-existing mesh of conventional 2-D …
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A Superposition Approach for Determining Lift Distributions on Maneuvering Airplanes with Applications to Post Stall.
North Carolina State University Theses Aerospace Engineering.
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Development of tension and compression creep models for wood using the time-temperature superposition principle
… and compression using the Time-Temperature Superposition Principle (TTSP). The principle states that the long-term response of a polymer at lower temperature is equivalent to the short-term response at a higher temperature. Accelerated creep tests were conducted in tension and compression …
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Effects of the chaotic behavior of a superposition of waves in the flux across a channel
… flux across a channel. The flow is given by a superposition of two propagating waves. The domain was set up so that a mode-I wave would fit on it, and the perturbation was a mode-4 wave. The experiments were carried out using a grid model with a second-order upwind differencing scheme. Simple …
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A Novel Media-Concentration Based Accelerated Hydrolytic Degradation Model for Biodegradable Polymers Based on Time-Concentration Superposition Frameworks
… to explore the validity of a Time-Concentration Superposition (TCS) framework applied to accelerated degradation tests in terms of their ability to predict real time degradation response. Samples were evaluated across multiple metrics, including mass loss, mechanical strength, thermal …
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