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 2399 for “"Disturbance"”.
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Structure-Inspired Disturbance Observer Design and Disturbance Observer-Based Control/estimation
… consists of two topics: (1) structure-inspired disturbance observer design and (2) disturbance observer-based control/estimation. The disturbance is defined as the discrepancy between a model and the system the model represents. A disturbance observer is an algorithm that generates an estimate …
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Body image disturbance in anorexia nervosa
Typescript (photocopy).
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A Reluctance Actuator Gap Disturbance Testbed
… designed and built a Reluctance Actuator Gap Disturbance Testbed. The testbed emulates the short stroke and long stroke interaction of modern lithography stages. The testbed can be used to impart gap disturbance of the order of 10[mu]m to a target platten thereby providing a gap disturbance to …
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Plant response to changes in disturbance magnitude
… can account for plant community response after disturbance, only life-cycle analysis for individual species, based on the observations of individuals within that species, can link population dynamics and environmental factors and hence provide useful insights into the underlying pattern and …
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Utility Disturbance Management in the Process Industry
… shared between several production areas, and a disturbance in the supply of a utility is therefore likely to affect a large part of the production site, and cause great loss of revenue. In order to minimize the loss of revenue due to disturbances in utilities, the optimal supply of utilities to …
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Disturbance Rejection and Control in Web Servers
… the response time as the main output. Several disturbances affect the system, such as the arrival rate of requests to the web site. A testbed was designed to allow repeatable experiments with different controller implementations. A server was instrumented with sensors and actuators to handle …
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Microbiome-centered Approaches to Marine Disturbance Ecology
… to alter our global ecosystem, ecological disturbances will increase in both frequency and intensity. These ecological disturbances have been shown to significantly impact microbial communities, often altering composition and/or function. However, while disturbance events are commonly …
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Mass imbalance compensation using disturbance accommodating control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Adaptive feedback technique for unmodeled disturbance rejection
… objective is to provide damping for transient disturbances via the fixed controller and rejection of steady disturbances via the adaptive controller. This technique differs from other control techniques in that it does not require a measurement of an external signal coherent with the …
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An Application and Refinement of the Karst Disturbance Index through Evaluating Variability in Island Karst Disturbance in Puerto Rico
… and also to groundwater supplies. The Karst Disturbance Index (KDI) is a holistic tool used to measure anthropogenic impacts associated with karst environments, which has been applied and refined through studies performed in Florida and Italy, yet still remains untested and susceptible to …
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Design and Analysis of a Deterministic Disturbance Generator
This thesis introduces the Deterministic Disturbance Generator (DDG) and its development process. The DDG performs two motions and five pitch rates. The flap motion, which rotates the airfoil from 0◦ to 20◦ and back, and the ramp motion, which rotates it from 0◦ to 20◦ with a dwell of 1s before …
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Fire disturbance and vegetation dynamics : analysis and models
Untersuchungen zur Rolle natürlicher Störungen in der Vegetation bzw. in Ökosystemen zeigen, dass natürliche Störungen ein essentielles und intrinsisches Element in Ökosystemen darstellen, substanziell zur Vitalität und strukturellen Diversität der Ökosysteme beitragen und Stoffkreisläufe sowohl …
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Disturbance Attenuation in Mass Chains with Passive Interconnection
This thesis is concerned with disturbance amplification in interconnected systems which may consist of a large number of elements. The main focus is on passive control of a chain of interconnected masses where a single point is subject to an external disturbance. The problem arises in the design of …
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Effect of sample disturbance in opalinus clay shales
The sample disturbance problem for different geomaterials is reviewed in this thesis. A general discussion on the disturbance sources and complexities of the disturbance problem is followed by detailed reviews on disturbance mechanisms and effects in soil and rock. This investigation leads to the …
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Printed Circuit Board Design for Frequency Disturbance Recorder
The FDR (Frequency Disturbance Recorder) is a data acquisition device for the power system. The device is portable and can be used with any residential wall outlet for frequency data collection. Furthermore, the FDR transmits calculated frequency data to the web for access by authorized users via …
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The effects of forest disturbance on stream stability
… of stream ecosystems in response to forest disturbance and subsequent succession. Stability was defined as the ability of streams to retain particulate organic matter and nutrients during storms. I hypothesized that forest streams are least stable during the intermediate stages of forest …
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Disturbance reduction in nonlinear systems via adaptive quenching
… is subject to external or parametric sinusoidal disturbances and the resulting control signal is also sinusoidal. The quenching algorithm provides a reduction in the control effort required compared to direct disturbance cancellation. The disturbance sinusoid and the unknown parameters are …
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RESISTANCE AND RESILIENCE OF STREAM SALAMANDER POPULATIONS TO DISTURBANCE
Urbanization and drought represent two pervasive disturbances that affect animal inhabitants of small, first-order streams. Stream salamanders (Family Plethodontidae) represent the dominant vertebrate group and play important ecological roles in first-order streams, although they have often been …
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