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 487 for “"Multi-stage"”.
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Modular Multi-Stage Axial Compressor Design
… and development-intensive components, such as multi-stage axial compressors. It is the objective of this approach to utilize a "core" module in all the compressors, thus maximizing commonality and minimizing all relevant development, design, manufacture, procurement, and service costs; these …
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Searching for Efficient Multi-Stage Vision Transformers
… techniques and present ViT-ResNAS, an efficient multi-stage ViT architecture designed with neural architecture search (NAS). First, we propose residual spatial reduction to decrease sequence lengths for deeper layers and utilize a multi-stage architecture. When reducing lengths, we add skip …
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Multi-stage adsorption-based atmospheric water harvesting
Atmospheric water harvesting (AWH) is the capture and collection of water that is present in the air either as vapor or small water droplets. Adsorption-based AWH uses adsorbent materials to collect water vapor from the air, the advantage being that the adsorbents can be regenerated by low-grade …
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A multi-stage sound-to-letter recognizer
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Multi-stage Stochastic Programming Models in Production Planning
… thesis, we study a series of closely related multi-stage stochastic programming models in production planning, from both a modeling and an algorithmic point of view. We first consider a very simple multi-stage stochastic lot-sizing problem, involving a single item with no fixed charge and …
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Impeller loss reduction in multi-stage centrifugal compressors
Loss generation features for the first stage impeller in a multistage centrifugal compressor are examined using three-dimensional RANS computations. The calculations were carried out for a baseline configuration and for seven other impeller configurations, with the constraints of constant mass flow …
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A study of multi-stage sludge digestion systems
Various combinations of multi-stage thermophilic and/or mesophilic anaerobic sludge digestion systems were studied to evaluate their solids reduction, odor generation after centrifugal dewatering and indicator organism reduction in comparison to single-stage thermophilic and/or mesophilic anaerobic …
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Novel approach to laser-driven multi-stage ion acceleration
… with the ions. This process lends itself to multi-staging, i.e. the sequential application of laser-driven accelerating fields, which is highly promising for significant increase of the accelerated proton energies. The project aims to develop this multi-stage approach which is totally new in …
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Towards Zero Defect Manufacturing in Multi-Stage Production Systems
Implementation of quality improvement methods in multi-stage production systems is essential to manage and quickly eliminate manufacturing quality defects. Many companies tend to prioritize production speed rather than overall throughput, and are hypothesized to be below the optimal level of …
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Return channel loss reduction in multi-stage centrifugal compressors
… improving the performance of return channels in multi-stage centrifugal compressors. Geometries have been developed to reduce both separation and viscous losses. A number of different features with potential to reduce separation have also been investigated. The final proposed geometry uses a …
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Improve supply chain resilience by multi-stage supply chain
… & Southeast Asia Cluster supply chain; and a multi-stage supply chain was proposed to improve the supply chain's resilience. A statistical model was constructed to select the optimal location of the central warehouse for the proposed multi-stage supply chain. After evaluating the resilience to …
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Improving supply chain resilience by multi-stage supply chain
… & Southeast Asia Cluster supply chain; and a multi-stage supply chain was proposed to improve the supply chain's resilience. A statistical model was constructed to select the optimal location of the central warehouse for the proposed multi-stage supply chain. After evaluating the resilience to …
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Multi-Stage Research Focused on Instructional Redesign and Organizational Reculturing
Improvement science enables school leaders and practitioners to tackle local problems of practice via the design and implementation of interventions aimed at the advancement of overall performance. This improvement science project targeted change in classroom practices, specifically the need to …
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Automated multi-stage geometry parameterization of internal fluid flow applications
… to offer a generic and practical solution. A multi-stage parameterization technique for three-dimensional surface manipulation is proposed. The first stage in the process defines the geometry in a global sense, allowing large scale freedom to produce a wide variety of shapes using only a small …
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MULTI-STAGE MULTI-MARKET OPTIMAL BIDDING STRATEGY IN ELECTRICITY MARKETS
<p>"Restructuring of power industry created the competitive situations for different MPs through designing appropriate electricity markets. Typically, in pool-based electricity markets, MPs submit their offers, and ISO clears the market and notifies MPs of the cleared power amounts and market …
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The effectiveness of antiscalants when used on multi-stage flash distillers.
… inhibitors) used to improve the performance of Multi-Stage Flash (MSF) distillers in Kuwait. This study describes and compares the thermal schemes, thermal efficiency and thermal performances ratios of the distillers when treated with three different antiscalants over a testing period of 6 …
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Muli-stage [i.e. Multi-stage] multi-product lotsize sequencing of operations
In this thesis, a multiple-stage - product sequence selection problem was mathematically modeled and analyzed. A fortran program that calculates the machine requirements for each machine station and each product type, and searches for the optimal product sequence combination was developed. Four …
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Multi-stage processing for effective segmentation of SAR sea ice images
Remote Sensing and Earth Observation became a reality, ever since the launch of NASA's first satellite; Landsat-1 in 1972. Subsequently, numerous other satellites were launched such as the TerraSAR, Sentinel-1 etc, which made possible to acquire High-Resolution imagery of remote areas such as the …
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The effect of gas on multi-stage mixed-flow centrifugal pumps
… Pumps consist of stacked centrifugal pump stages, each comprising a bladed impeller (rotating part) and diffuser (stationary part). In multiphase conditions, the gas tends to accumulate in the impeller, severely reducing the pressure produced by the pump. Radial-flow pumps operate in a …
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