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 27 for “"Covariance Analysis"”.
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An automated tool for formulating linear covariance analysis problems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Generalized Gaussian covariance analysis in multi-market risk assessment
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Assessment of validity of linear covariance analysis with unscented methods
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Linear covariance analysis of atmospheric entry for sample return mission
Linear covariance analysis is an uncertainty analysis tool comparable to Monte Carlo analysis; both provide similar statistical information about the performance and uncertainties of a dynamic system. Linear covariance analysis linearizes the models of a dynamic system and propagates the state …
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Guidance laws for partially-observable UAV interception based on linear covariance analysis
… relative position and velocity. Using Linear Covariance Analysis, an novel algorithm is developed to pick the series of maneuvers that gives the best probability of capture. This algorithm is demonstrated on a quadrotor in flight intercepting a simulated evader drone, and it is shown to …
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Linear covariance analysis trade study of autonomous navigation schemes for cislunar missions
… of autonomous navigation by conducting a linear covariance analysis trade study on various configurations of autonomous sensors for a representative cislunar mission. The sensor suite is comprised of twelve sensors of varying measurement types and levels of flight readiness: MIMU IMU, LN200 IMU, …
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An application of linear covariance analysis to the design of responsive near-rendezvous missions
… raising, and near-rendezvous operations. An analysis method known as Linear Covariance analysis is introduced to provide a platform of estimating the navigation covariance and dispersion of the spacecraft during the second and third phases, while the first phase, up to main-engine-cutoff, is …
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An analytic method of propagating a covariance matrix to a maneuver condition for linear covariance analysis during redezvous
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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A systems analysis of the impact of navigation instrumentation on-board a Mars rover, based on a covariance analysis of navigation performance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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A Confirmatory Multivariate Study of the Nature of Second Language Proficiency and Its Relationship to Learner Variables (Acquisition, Covariance, Analysis, Structural Equation Models, Lisrel, Foreign, Teaching English as A Foreign Language, Tefl)
… against each other using confirmatory factor analysis. Second, the relationships between different aspects of language proficiency and selected learner variables were investigated using causal modeling techniques. Regarding the nature of second language proficiency, a correlated traits …
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Optimal trajectory design under uncertainty
… design. This thesis explores the use of linear covariance analysis to directly include trajectory robustness in the design process. The covariance matrix can be propagated along a trajectory to provide the expected errors about the nominal trajectory in the presence of uncertainties. During the …
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Localization with the EnKF for the Automatic History Matching of the SAGD Processes
… localization function were determined through covariance analysis by using a large ensemble with 1000 members. The covariance analysis indicated that the regions of cross correlations between oil production and state variables are much wider than the correlations between production data and …
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Time-frequency analysis techniques for non-intrusive load monitoring
The work in this thesis examines time-frequency analysis techniques and in particular the wavelet transform to extract the features contained within the electrical load signals. A novel approach that is based on wavelet design was utilized to generate a wavelet library which was used to match each …
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Autonomous optical navigation for lunar missions
… lunar navigation are analyzed using linear covariance analysis methods. The measurements include a feature tracking camera measurement, star landmark elevation measurement, star horizon elevation measurement, and star occultation measurement. Based on trade studies performed, the star …
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An analytical investigation of passive and active suspension systems for articulated freight vehicles
… the road measured data. A technique, based on covariance analysis, is employed to perform the multi-parameter sensitivity analysis and to design an "optimum" passive suspension. A performance index comprising ride quality, cargo safety, suspension rattle space and dynamic tire forces is …
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A statistical analysis of data on the corrosion of aluminum in hydrochloric acid vapors
… corrosion data were subjected to statistical analysis for the purpose of obtaining meaningful estimates of the specific rate of reaction and the energy of activation and obtaining a response equation for prediction of weight gain. A two-stage analysis was used in the estimation of specific …
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Variance Spectroscopy and its Application to the Study of Single-Wall Carbon Nanotubes
… data are spectrally resolved, allowing for the analysis of individual SWCNT emitters in a complex sample. Several thousand statistically independent spectra from different regions are measured using custom instrumentation. The mean and variance of the emission intensity at each wavelength are …
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Ecology of the stalk borer Papaipema nebris (Guenee), (Lepidoptera:noctuidae), in the southwestern Virginia no-till corn agroecosystem
… development from year to year. Linear regression covariance analysis showed that larval development was different between field collected larvae from year to year.
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