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 16 of 16 for “"process chain"”.
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Evaluation of alternative pretreatment methods for use in direct filtration water treatment
… portion of a water treatment process and to study the implications of the results with respect to future use in direct filtration. The performance of the coagulant, coagulant aid, and primary coagulant polymer was evaluated by altering the flocculation and sedimentation …
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Integration of component-based frameworks with sensor modeling languages for the sensor web
… language). An important part of SensorML is its process model. Each sensor in the real world is depicted in SensorML by a process model, whereas the connections between the sensors are shown by a process chain. This thesis presents a translator that reads these documents and converts them to Java …
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Effects of Hot Isostatic Pressing on Copper Parts Additively Manufactured via Binder Jetting
… together of powders) from energy supply (post-process sintering). However, it is challenging to fabricate parts of high density using this method due to low packing density of powder while printing. This work aims to investigate the effects of Hot Isostatic Pressing (HIP) as a secondary …
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Additive manufacturing of polyolefins via powder bed fusion
… fusion (PBF) is an additive manufacturing (AM) process in which a fine polymer powder is selectively heated and melted using infra-red (IR) energy from a CO2 laser to melt the powder and coalesce the molten polymer together to form each layer. Semi-crystalline polymers are the most common …
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Analysis of hydrogen-based energy storage pathways
… (PEMFC, SOFC or combined cycle gas turbine). All processes are simulated with respect to their full and part-load efficiencies and resulting costs. Furthermore, load profiles are estimated to simulate a whole year of operation at varying loads. The results show power-to-power exergy efficiencies …
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Nonlinear Finite Element Modeling and Analysis of Metal Hot Forming for Automotive Weight Reduction
… developed methodology is applied to the forming process of a transmission clutch hub which is constructed from UHSS 22MnB5 for the purpose of automotive lightweighting. The entire process chain is considered, including the hot stamping process, in which a high temperature blank enters a stamping …
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An application protocol for near net shape technologies implementation
… and lead times in established manufacturing processes. However identifying candidate NNS processes and optimizing their implementation is frequently done in an adhoc manner without the benefits of a structured process of discovery and assessment. Motivated by the need for more robust …
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Improvements in Liquid Composite Moulding through Assessment of Process Parameters
… (LCM) describes a family of manufacturing processes utilised for the manufacture of fibre reinforced plastics. With a large number of variables and process parameters requiring active measurement and control, achieving high quality simultaneously with low cost and variability has proven an …
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Automatisierte Objektidentifikation und Visualisierung terrestrischer Oberflächenformen
Die automatisierte Objektidentifikation stellt ein modernes Werkzeug in den Geoinformationswissenschaften dar (BLASCHKE et al., 2012). Um bei thematischen Kartierungen untereinander vergleichbare Ergebnisse zu erzielen, sollen aus Sicht der Geoinformatik Mittel für die Objektidentifikation …
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Life Cycle Analysis of Greenhouse Gas Emissions from the Mining and Milling of Uranium in Saskatchewan
… based on the ISO 14040:2006 standard using a Process Chain Analysis methodology. This study differs from previous studies of GHG emissions intensity during the uranium mining-milling phase of the nuclear fuel cycle in two key respects. First, it has a very large system boundary which includes …
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Structuring process models
… the ideas of Donald E. Knuth to conclude that process modeling is both a science and an art. Process modeling does have an aesthetic sense. Similar to composing an opera or writing a novel, process modeling is carried out by humans who undergo creative practices when engineering a process …
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Cyber-Physical Security for Additive Manufacturing Systems
… a detailed analysis of vulnerabilities in the AM process chain and how these attack vectors could be used to execute malicious part sabotage attacks. This work demonstrated the ability of an internal void attack on the .STL file to reduce the yield load of a tensile specimen by 14% while escaping …
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A study of the forming limits of cold and hot forming of aluminium alloy sheets with multi-point tooling
… when the forming takes place under different process and machine-set conditions, especially materials such as high strength aluminium alloy sheets.Hot stamping technology is capable of improving the material properties and forming limits while reducing the forming-force requirement and …
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Simulation and optimisation of the Interior High Pressure (IHP) manufacturing process using the Finite Element Method (FEA)
… very costly. Simulation of the manufacturing processes within the production engineering (“Digital Prototyping”) can help to reduce production time and therefore reduce this considerable cost. Simulation of the IHP forming process helps to replace the classical prototyping method. Today the …
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Design and fabrication of a multipurpose compliant nanopositioning architecture
… (NLBM), a hybrid macro-/micro-fabrication process chain that can produce MEMS with integrated sensing in a flexible manner, at small volumes and with low per-device costs. This will allow for low-cost customizable nanopositioning architectures with integrated position sensing to be created …
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IT Supported Construction Project Management Methodology Based on Process and Product Model and Quality Management
… Management (CPM) supported by product and process models can be seen as a future type of integration structure facilitating the solution of various management problems in the fragmented Construction Industry. The key to success is directly correlated with the comprehensive integration of …