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 10 of 10 for “"Quality constraints"”.
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Data curation with ontology functional dependences
Poor data quality has become a pervasive issue due to the increasing complexity and size of modern datasets. Functional dependencies have been used in existing cleaning solutions to model syntactic equivalence. They are not able to model semantic equivelence, however. We advance the state of data …
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Learning efficient image processing pipelines
… for speed is subject to stringent image quality constraints and requires significant efforts from skilled programmers. Because quality is driven by perceptual factors with which most quantitative image metrics correlate poorly, developing new pipelines involves long iteration cycles, …
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A linear programming approach to minimizing wood procurement costs for integrated forest products firms
… The study is implemented with the product quality constraints and a managerial constraint of the firm and incorporates timber growth into the selection of procurement alternatives. The minimum present value cost solutions of the four price structures studied are presented and discussed. …
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High throughput extrusion additive manufacturing – rate limits and system design
… systems that maximize rate, subject to specified quality constraints and guided by finite element analyses and parametric models; 2) the mechanical design and construction of a servo-driven FFF testbed that uses a parallel H-frame belt drive; and 3) implementing closed-loop servo control with the …
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An integrated architecture analysis framework for component-based software development
… architecture right is therefore key to ensuring quality in a component-based system. Architecture analysis in CBD provides the developer with a means to expose interface mismatches, assess configurations with respect to specific structural and behavioural constraints and to verify the adequacy of …
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Efficient Identification and Control Methods For Nonlinear Systems Under Uncertainty
… limits and that each product meets certain quality constraints and specifications. Modeling and Control of a refinery simulation facility are presented using second order Volterra series models and a NMPC formulation that uses hard constraints on the actuator inputs. Realistic process data …
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Discovery of trend dependencies over time-series
We improve constraint-based data quality using trend dependency (TD) discovery, extending existing order dependencies (ODs) to allow variations and exceptions. Unlike ODs, TDs capture approximate functional mappings between attributes, addressing the limitations of monotonicity. Our approach …
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Lake remediation by top-down and bottom-up management : an ecosystem-scale experiment in the English Lake District
… these two opposing forces in determining water quality changes in response to anthropogenic pressures, specifically eutrophication and climate change. The research is presented as three studies which address the historical, contemporary and future impact of stressors on the ecological structure …
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Operating Rules for Improving the Firm Yield of an Off-Stream Blending Reservoir System Used for Reducing Nitrate in Drinking Water and Drought Storage
… concentrations exceeding drinking water quality standards can use off-stream blending reservoirs (OSBR) to increase their water supply reliability and avoid investments in expensive treatment technology. The water quality operating rules (WQOR) that water supply systems use to regulate …
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multimedia transmission over wireless networks: performance analysis and optimal resource allocation
… Such multimedia applications require certain quality of service (QoS) guarantees in terms of delay, packet loss, buffer underflows and overflows, and received multimedia quality. It is also important to note that such requirements need to be satisfied in the presence of limited wireless …