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 29 for “"Loss estimation"”.
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Earthquake loss estimation including transportation network damage
… causing extensive damage and enormous economic losses. These losses are primarily attributable to the reduction in functionality of various facilities in the affected region and the rebuilding costs, and can be reduced through strategic pre- and post-earthquake decisions. This thesis describes …
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In situ power-loss estimation of IGBT modules
… to reduce system downtime. In situ lifetime estimation of IGBT modules has been challenging due to a number of requirements: the necessity to operate at high voltage in the switching environment and the measurement precision of the gate-threshold voltage or collector-to-emitter voltage. This …
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Uncertainty and sensitivity in regional earthquake loss estimation
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.
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Motion based seismic design and loss estimation of diagrid structures
… of Diagrids and how it integrates with seismic loss estimation. A motion based design scheme can facilitate the seismic design of Diagrids with the ultimate goal of reducing upfront costs and repair costs. In this thesis we analyze Diagrids with varying locations, aspect ratios, diagonal angles, …
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Cell loss estimation in an ATM multiplexer loaded with heterogeneous on-off sources
In an ATM network, estimating cell loss probability is a crucial factor in congestion control and traffic management. This thesis proposes a method to estimate the cell loss probability in an ATM multiplexer with heterogeneous traffic sources. We consider an ATM Multiplexer with a finite buffer of …
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An indirect loss estimation methodology to account for regional earthquake damage to highway bridges
… framework to estimate the indirect economic loss due to damaged bridges within the highway system from an earthquake event. The framework is designed to be general and convenient to apply to other study regions. In this dissertation, a simulated earthquake scenario centered in St. Louis …
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Regional earthquake loss estimation : role of transportation network, sensitivity and uncertainty, and risk mitigation
… damage to the physical infrastructure and losses to the regional and national economies. Economic losses are due in part to direct damage and in part to business interruption caused by non- functioning infrastructure and interdependencies among industrial sectors. We developed a regional …
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Texture-Informed Approach for Hurricane Loss Estimation: How Discounting Neighborhood Texture Leads to Under-Valuing Wind Mitigation
… (to reduce those risks). Present tools for loss estimation overlook building-level variations in wind loading induced by the configuration of surrounding buildings, called neighborhood texture. By doing so, such tools under-estimate expected wind-related losses and under-value wind …
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Seismic Loss Assessment and Mitigation of Critical Urban Infrastructure Systems
… substantial infrastructure systems for seismic loss estimation and mitigation study. The resulting output of the methodology can provide useful insight to assist in prioritizing components of infrastructure systems for seismic retrofit to enhance their postearthquake functionality.
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Active leakage management with bayesian networks
… management approaches that increase water losses and risk the destruction of neighboring infrastructure and water contamination. This study therefore presents a pipe leak monitoring and optimal maintenance sequencedeterminingmodellingframeworkthatisapplicableevenindistribution systems with …
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Risk Analysis and Damage Assessment For Flood Prone Areas in Washington DC
This thesis presents a loss estimation method regarding areas of District of Columbia susceptible to flooding, specifically the Southwest quadrant, the National Mall, and Federal Triangle. This thesis develops data for input to a flood model that considers parameters such as detailed digital …
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Dead time and count loss determination for radiation detection systems in high count rate applications
… is focused on dead time and the subsequent count loss estimation in radiation detection systems. The dead time is the minimum amount of time required between two events to permit detection of those events individually by a radiation detection system. If events occur during the system dead time, …
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Techniques for Reliability and Robustness in Integrated Electronic and Photonic Systems
… failure mechanism models. A maximum-likelihood-estimation-based approach is demonstrated for the simultaneous extraction of waveguide index and thickness variations using integrated photonic direction couplers and Mach-Zehnder interferometers. Schemes are proposed for optimal selection of …
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Assessment of soil erosion hazard around the abandoned mine in formerly Mutale Municipality, Limpopo Province, South Africa
… abandoned mine. The modified method of Soil Loss Estimation Model for Southern Africa (SLEMSA), for assessing soil erosion hazard, was used to estimate the spatial variation of erosion to achieve the goal of the study. Parameters that were considered for the model include relief (Slope …
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Automated Estimation of ISIP and Friction Losses in Hydraulic Fracture Treatment Falloff Data
… to estimate wellbore and perforation friction loss and tortuosity friction loss from hydraulic fracture treatment falloff data. It illustrated friction loss estimations for 270 stages in 16 shale gas wells drilled from the same pad. The resulting estimates reflect a combination of formation and …
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Dissipation in Skewed Boundary Layers
… for the first time. The simulations enable the loss mechanisms responsible for this change in loss to be determined and changes in turbulence structure to be visualised. A new relationship between boundary layer skew and dissipation coefficient is defined and applied to a turbine cascade to …
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Alternative structures for integrated electromagnetic passives
… algorithm combining electromagnetic design and loss models has been developed to optimize and evaluate the spiral winding structure. High power density of 480 W/in3 has been obtained on the prototype. Due to the structural limitation, the currently applied planar spiral winding structure does …
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Radijo bangų difrakcijos ir spindulių trasavimo metodų palyginimas urbanizuotose vietovėse /
… but there is no universal way of predicting losses due to diffraction. The most accurate method is ray tracing, but it is very sensitive to geometry errors and has a slow calculation process, therefore other algorithms are being developed and improved. A paper released in 2021 suggests a …
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Advanced Methods for the Analysis of Radar Sounder Data Acquired at the Ice Sheets
… for the automatic detection and property estimation of ice subsurface targets. This is done by using the parameters of the RS system combined with the output of an automatic image segmentation algorithm. The third contribution presents an automatic technique for the local 3D reconstruction …
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