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.
Results
Showing 1 to 20 of 293 for “"ascent"”.
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Multivariate Steepest Ascent Using Bayesian Reliability
The path of steepest ascent can used to optimize a response in an experiment, but problems can occur with multiple responses. Past approaches to this issue such as Del Castillo’s overlap of confidence cones and Mee and Xiao’s Pareto Optimality, have not considered the correlations of the responses …
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System design of a Mars ascent vehicle
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Ascent guidance for a winged boost vehicle
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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The ascent of oligarchy: the case of Israel
The aim of this thesis is to explore the development of an oligarchy in the Israeli political economy. In that, it both sheds light on the state-business relationship in the Israeli political economy, and refines the understanding of oligarchy in general. In order to achieve this two-folded …
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Ascent, descent, nullity and defect of linear operators
… defect of linear operators on the one hand, and ascent and descent on the other, and the relationships between these concepts. These quantities are of considerable use in the discussion of linear operators, e.g. compact operators.
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Optimal, impulsive, direct ascent, time-fixed orbital interception
… trajectories is applied to minimum fuel, direct ascent, time-fixed intercept trajectories. The optimal trajectory is obtained by satisfying Lawden's necessary conditions expressed in terms of the primer vector. The vehicle is initially at rest on the surface of a spherical planet and the target …
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Optimization in electrical distribution systems: Discrete Ascent Optimal Programming
… systems. The new algorithm, Discrete Ascent Optimal Programming (DAOP), will converge to the same solution as the Lagrange multiplier approach as demonstrated by example. An intuitive discussion illustrating the path of convergence is presented along with a theorem concerning …
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Ascent dynamics: an efficient algorithm probing long timescale dynamics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
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Mutual information-based gradient-ascent control for distributed robotics
… decentralized mutual information-based gradient-ascent controllers that continuously move robots equipped with sensors to better observe their environment. We begin with the fundamental problem of deploying a single ground robot equipped with a range sensor and tasked to build an occupancy grid …
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Pitch-Control Predictor-Corrector and Neural Network Ascent Guidance
A pitch-control predictor-corrector ascent guidance algorithm has been developed and evaluated for a rocket-based upper stage of a two-stage-to-orbit launch vehicle. Detailed descriptions of the predictor-corrector algorithm and a neural network loop modification are given. The mission requirement …
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Precision of the path of steepest ascent in response surface methodology
… the precision of the path of steepest ascent in response surface methodology to cover situations with correlated and heteroscedastic responses, including the important class of generalised linear models. It is shown how the eigenvalues of a certain matrix can be used to express the …
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Application of Steepest-Entropy-Ascent Quantum Thermodynamics to Solid-State Phenomena
Steepest-entropy-ascent quantum thermodynamics (SEAQT) is a mathematical and theoretical framework for intrinsic quantum thermodynamics (IQT), a unified theory of quantum mechanics and thermodynamics. In the theoretical framework, entropy is viewed as a measure of energy load sharing among …
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Risk analysis model for the ascent phase of scientific balloon operations
… to predict the risk associated with the ascent phase of a balloon operation. This model includes all of the significant factors that affect ascent phase risk. The model is automated in a computer program whose input contains all of the parameters and factors for a particular mission. The …
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Advancing the Ascent into Higher Education: An Exploration of College Access Programming
The following case study was conducted as a master’s thesis on Breakthrough Twin Cities, a college access program located in the Minneapolis/St. Paul metropolitan area of Minnesota. This study explored the perspectives of participating students, parents, staff members and the board of directors …
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Model predictive control for ascent load management of a reusable launch vehicle
During the boost phase of ascent, winds have a significant impact on a launch vehicle's angle of attack, and can induce large structural loads on the vehicle. Traditional methods for mitigating these loads involve measuring the winds prior to launch and designing trajectories to minimize the …
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Genetic algorithm gradient ascent (GAGA) optimization of compact symmetry-breaking photonic crystals
… by the application of the numerical gradient ascent (GAGA) algorithm as a local optimization to further enhance the design. The first absorber design takes advantage of the intrinsic nonreciprocity of time-reversal symmetry (TRS) breaking Weyl semimetals due to their pseudomagnetic field in …
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Steepest-Entropy-Ascent Quantum Thermodynamic Modeling of Quantum Information and Quantum Computing Systems
… as the system evolves and uses steepest-entropy-ascent quantum thermodynamics (SEAQT) to predict the evolution of system state. SEAQT asserts that, at any instant of time, the system state evolves such that the rate of system entropy change is maximized while conserving system energy. With this …
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The consequences of gas slug ascent in a stratified magma on Strombolian eruption dynamics
… bursting of large gas pockets (slugs) following ascent through relatively low-viscosity magma within the volcanic conduit. However, this paradigm was forged when the complex rheology of the magma at Stromboli, the model-type volcano for this activity, was still poorly constrained. Textural and …
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Prediction of Microstructural and Conformational Evolutions through Application of Steepest-Entropy-Ascent Quantum Thermodynamics
Steepest Entropy Ascent Quantum Thermodynamics (SEAQT) is a novel theoretical framework unifying quantum mechanics and thermodynamics. This framework employs an equation of motion governed by the principle of steepest entropy ascent to determine the thermodynamic state evolution of modeled systems. …
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Spiritual Struggle and Gregory of Nyssa’s Theory of Perpetual Ascent: An Orthodox Christian Virtue Ethic
… a basic three-tiered conception of perpetual ascent, beginning with purification and detachment from from fleshly passions, strengthening the soul by increasing in similitude to God, and ending with unity with God, that is, with inexpressible and transformative experience of God. God—the …
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