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 12874 for “"varying"”.
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Communication via randomly varying channels
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1961.
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On slowly varying Stokes waves.
Massachusetts Institute of Technology. Dept. of Civil Engineering. Thesis. 1970. Ph.D.
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Survivability of time-varying networks
Time-varying graphs are a useful model for networks with dynamic connectivity such as mmWave networks and vehicular networks, yet, despite their great modeling power, many important features of time-varying graphs are still poorly understood. In this thesis, we study the survivability properties of …
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Estimating varying illuminant colours in images
… the ability to perceive colours independently of varying illumi-nation colour. A human could tell that a white t-shirt was indeed white, even under the presence of blue or red illumination. These illuminant colours would actually make the reflectance colour of the t-shirt bluish or reddish. Humans …
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MICA: Fluid Flow Over Varying Geometries
The MICA program attempts to make hands on experiments involving measurement, instrumentation, controls, and analysis broadly available in the form of affordable and portable set-ups. A portable water flow visualization chamber was designed and prototyped for use in fluids courses to enable hands …
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Adaption to a varying auditory environment
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Adaptive Control for Nonlinear, Time Varying Systems
… for aerospace systems to exhibit nonlinear, time varying dynamics. This thesis investigates the development of adaptive control laws to stabilize and control a class of nonlinear, time varying systems. Direct adaptive control architectures are implemented in order to compensate for time varying …
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Brownian Motion on Spaces with Varying Dimension
… with or without drift on state spaces with varying dimension. Starting with a concrete such state space that is the plane with an infinite pole on it, we construct a Brownian motion on it and derive sharp two-sided global estimates on its transition density functions (also called heat …
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Cooperative impedance control with time-varying stiffness
… manipulators. Through the use of time-varying impedance parameters, this controller limits the interaction forces to ensure harmless manipulation. Successful completion of transport and insertion tasks demonstrated the effectiveness of the controller.
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Slowly varying pipe flow of thixotropic fluids
… in two flow problems: unsteady flow in a slowly varying 3D pipe, and oscillating flow in a uniform cylindrical pipe. We consider two fluid models which exhibit interesting non-Newtonian behaviour: the viscous Moore-Mewis-Wagner (MMW)model, and the viscoplastic Houška model.In Chapters 2-6 we …
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Surface Wave Analysis in Laterally Varying Media
… of the S-wave velocity behaviour in laterally varying media. The surface wave method, in fact, can be effectively adopted for different purposes and at different scales, but I focused on the geo-engineering and geotechnical applications of surface wave analysis and also on the production of …
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Operator Strategies Under Varying Conditions of Workload
<p>The present study attempted to operationally define and measure strategic behavior in a complex multiple task environment. The Multi-Attribute Task battery was developed to simulate various aspects of flight and consisted of an auditory communication task, monitoring tasks, a tracking task, a …
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Varying Priorities in Strategic Nuclear Arms Control
<p>Since the beginning of strategic nuclear arms control negotiations in 1969, Moscow and Washington have entered discussions with priorities to be met, though these differed greatly from one another. There were many driving factors for both world powers in seeking limitations and restrictions of …
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Model Reduction for Linear Time-Varying Systems
The thesis treats model reduction for linear time-varying systems. Time-varying models appear in many fields, including power systems, chemical engineering, aeronautics, and computational science. They can also be used for approximation of time-invariant nonlinear models. Model reduction is a topic …
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Dynamic Programming and Time-Varying Delay Systems
… stability and performance of systems with time-varying delays. The two papers presented in the first part attacks optimal control problems with finite but rapidly increasing search space. In the first paper we try it reduce the complexity of the optimization by exploiting the structure of a …
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Three Pension Cost Methods under Varying Assumptions
A pension plan administrator promises certain benefits in the future in exchange for labor today. In order to budget for this expense and create more security for the participant, the administrator uses a pension cost method. Each cost method assigns a portion of the future liability to the current …
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Feedback Communication Systems for Time-Varying Channels
The growing use of centralized data processing systems has led to a demand for data transmission facilities from remote locations, mobile stations, and even from space. To meet this demand the possibilities of data transmission over radio channels have been widely investigated. A major problem …
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Quantile Regression in a Varying Coefficient Model
… the estimation of conditional quantiles in a varying-coefficient model. Quantile functions are estimated by polynomial splines and computed via linear programming. A stepwise model selection algorithm is adopted for knot selection. We show that the spline estimators attain the optimal rate of …
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