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 32 for “"Degradation Model"”.
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Exploring issues for a cartilage degradation model
The primary goal of this work was to establish a model system wherein a controlled level of damage is induced to a sample of normal cartilage, such that damage and repair can be observed by the dGEMRIC method of MR imaging. Primarily this included the iterative design of a cartilage tissue holder …
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Integrated environmental degradation model for Fe-Ni-Cr alloys in irradiated aqueous solutions
An integrated model has been developed to evaluate the effect of reactor flux, fluence, and other operating conditions on crack growth rates in austenitic stainless steels in boiling water reactor (BWR) environments. The model evaluates the following in order to account for all factors affecting …
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Procedure for optimal D.C. parameter extraction for hot-carrier degradation model calibration and verification
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Monitoring Corrosion of Rebar Embedded in Mortar Using Guided Ultrasonic Waves
… within the framework of a corrosion process degradation model and service life. A thorough review and discussion of the corrosion process, modeling the propagation of corrosion, nondestructive methods for monitoring corrosion in reinforced concrete, and guided mechanical waves have also been …
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Power transformer health assessment derived from low energy and dissolved parameters
… of both analytic research to create a low energy degradation model and then empirical testing of the model on field data in the form of dissolved gas analysis as recorded from 201 GSU transformers that have either failed or are presently in service.
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Optimal inspection and maintenance for stochastically deteriorating systems
… based maintenance policies, for systems whose degradation may be modelled by a continuous time stochastic process. Our emphasis is mainly on using the information gained from inspecting the degradation to determine efficient maintenance and inspection policies. The system we shall consider is …
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VALIDATION OF CIRCUIT TIMING BEHAVIOR IN THE PRESENCE OF DELAY DEFECTS AND NBTI AGING
… The traditional stuck-at, and transition fault model are not appropriate to model such defects. They must be tested appropriately by targeting critical paths in the circuit. Furthermore, reliability issues such as Negative Bias Temperature Instability (NBTI) and Hot carrier injection impact the …
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The degradation of gel-spun poly(beta-hydroxybutyrate) fibrous matrix
… quantitative investigations of the structure and degradation of a previously unstudied, novel, fibrous form of PHB, were completed. This gel-spun PHB fibrous matrix, PHB(FM), which has a similar appearance to cotton wool, possesses a relatively complex structure which combines a large volume with …
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Peptidazių iš Geobacillus thermoleovorans DSM 15325 kolagenolizinio aktyvumo analizė: M3 proteolizinių fermentų šeimos M3B pošeimio oligopeptidazės ir U32 proteolizinių fermentų šeimos peptidazės charakterizavimas /
… lead to substantial development of collagen degradation model and confirms importance of collagenolytic potential for adaptive plasticity of bacteria. Determined M3 family M3B subfamily oligopeptidases, secreted by geobacilli, characteristics indicate oligopeptidases nutritional importance …
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The collagenolytic activity analysis of Geobacillus thermoleovorans DSM 15325 peptidases: characterization of M3 proteolytic enzymes family M3B subfamily oligopeptidase and U32 proteolytic enzymes family peptidase /
… lead to substantial development of collagen degradation model and confirms importance of collagenolytic potential for adaptive plasticity of bacteria. Determined M3 family M3B subfamily oligopeptidases, secreted by geobacilli, characteristics indicate oligopeptidases nutritional importance …
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Investigation Into the Mitigation of the Effects of Uncertain Optical Degradation on an Interplanetary Solar Sail Mission Using a Single Model Update
… influential considerations, uncertain optical degradation, has been shown to present significant trajectory design difficulties. This paper investigates the potential of using a mid-course degradation model update to mitigate the risk of missing the target destination in a sample 300 day …
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Delamination damage of carbon fiber-reinforced polymer composite laminates under cyclic shear-induced loading conditions
… been successfully described using cohesive zone model (CZM). Many previous CZM approaches for cyclic case were considering damage parameters based on a crack growth relation which has some disadvantages for predicting a non-linear crack growth. In addition, the previous CZM approach lacks ground …
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Advanced battery modeling for interfacial phenomena and optimal charging
… consuming and limited in small scale’s study. Modeling techniques provide us powerful tools to get a deep understanding of the relevant physics and find optimal solutions. This work focuses on studying the mechanism in advanced battery engineering techniques and developing a new charging …
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City-scale eco-routing and pavement eco-maintenance scheduling for CO2 mitigation
… the traffic operation side, a mesoscopic traffic model is adopted for simulating drivers’ route choices with varying percentages of travellers to choose the eco-friendly routes. From the infrastructure asset management perspective, a city-scale pavement degradation model is built and utilised in …
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Prediction of Battery Health Dynamics
… performance, and cost. In this work, advanced modeling techniques are developed to tackle some of these issues. This dissertation is subdivided into four parts, the first is introduction while the remaining are dedicated to the development of computational techniques for predicting battery …
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Advancements in Degradation Modeling, Uncertainty Quantification and Spatial Variable Selection
… out of m future observations; 2) semi-parametric degradation model for accelerated destructive degradation test (ADDT) data; and 3) spatial variable selection and application to Lyme disease data in Virginia. Followed by the general introduction in Chapter 1, the rest of the dissertation consists …
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Reliability analysis and service life prediction of pipelines
… probability theory and the gamma distributed degradation model are developed and applied for service life prediction of the pipes. The obtained results are verified by using Monte Carlo simulation technique. Sensitivity analysis is also performed to identify the most important parameters that …
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Kinetics of the activated sludge process
… considerations that entered into setting up a model describing the kinetics of carbonaceous material degradation. This model forms the foundation on which denitrification and biological excess phosphorus removal are readily grafted; understanding of the carbonaceous degradation model …
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Experimental investigation and modeling of lithium-ion battery cells and packs for electric vehicles
… system. In addition, accurate battery thermal models capable of predicting the behavior of lithium-ion batteries under various operating conditions are necessary. Therefore, this work presents the thermal characterization of a prismatic lithium-ion battery cell and pack comprised of LiFePO4 …
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An Integrated Methodology for Non-Destructive Reliability Assessment of Remanufactured Components
… component. From these collected data sets, a degradation model of the component was built to represent the inevitable deterioration of the component’s performance. One of the significant modules of the methodology was estimating the outcomes of a proposed remanufacturing process. A …
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