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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 33 for “"Backpressure"”.
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Backpressure networks with cooperative link augmentation
Made available in DSpace on 2017-03-01T16:37:08Z (GMT). No. of bitstreams: 2 LEE-THESIS-2016.pdf: 886931 bytes, checksum: 861a01b978b7a8909d863c93388cc960 (MD5) LICENSE.txt: 4208 bytes, checksum: 751f13872c59aa3d2ae5fe4a3cade338 (MD5) Previous issue date: 2016-12-07
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Backpressure Policies for Wireless ad hoc Networks
… and low end-user delay. In the literature, the backpressure policy, i.e. queue backlog differential-based joint routing and scheduling, is known to be throughput-optimal with robust support for traffic load fluctuations \cite{Tssailus92}. Unfortunately, many backpressure-based algorithms cannot …
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Optimal control for wireless networks
… the only known throughput-optimal policy is the Backpressure policy for the unicast problem. In this thesis, we propose provably optimal algorithms for the broadcast and the generalized flow problems. Our study begins with the problem of optimal broadcasting in a wireless Directed Acyclic Graph …
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Preparation, characterisation and modification of porous carbon monolithic materials for chromatographic and electrochemical applications
… as SEM/EDX, BET, dilatometry, conductivity & backpressure determination and investigated for chromatographic application. Surface modification of the resultant carbon monoliths with gold nano-particles and nano-layers was carried out for further modification with thiol based affinity and …
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Development of a process modelling methodology and condition monitoring platform for air-cooled condensers
… a heat rejection rate decrease of 10.9 MW and a backpressure increase of 7.79 kPa across the temperature range. Condensers' heat rejection rate decreased with higher air temperatures, while dephlegmators' heat rejection rate increased due to the increased outlet vapour pressure and flow rates …
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Characterizing ash properties and effects on Diesel Particulate Filter flow resistance
… flow resistance of the filter which creates more backpressure on the engine and results in a decrease in fuel economy. Over the life of the filter, the ash particles become a significant portion of particulate matter in the filter and the resulting flow resistance. While the effects of ash and …
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Ash impacts on gasoline particulate filter performance and service life
… will reduce engine power and efficiency. This backpressure will increase as PM is trapped in the filter and decrease as combustible PM removed. A buildup of incombustible ash present in engine-out PM will increase the baseline backpressure of the filter during the course of its service life. It …
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Influence of electrode stress on proton exchange membrane fuel cell performance : experimental characterization and power optimization
… and to level off near 4.0 MPa. Changing the cell backpressure from 0 psi to 10 psi and then 20 psi improved the power density at high stress but did not help performance below 1.6 MPa. Cell operation at 45°C yielded a power density that was 28% higher than at 23°C, but a further increase to 65°C …
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Considerações sobre ensaios triaxiais em areias
… seepage water, followed by an application of backpressure, is also tested with success. The influence of the free-ends condition on the stressstrain- strength relationship is subsequently investigated through the use of lubricated rubber membranes placed on top and bottom of the specimen. …
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The Control of Diesel Particulates in Underground Coal Mines
… of a test rig to measure the efficiency and backpressure of new and used disposable filters b) The testing of the in service fleet at four of BHP Billiton Illawarra Coal mines using an R&P Series 5100 diesel analysis system mounted in a trailer c) Comparison of a newer design engine with …
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Fiber Optic Sensing of Strain and Temperature for Structures in a Hypersonic Flow
… boundary of the plenum box, and the generated backpressure influenced the (acoustic) stiffness of the system. A variety of testing conditions were studied, and 19 experiments were conducted at Mach 6 flow speed. The following parameters were varied in the experiments: fin angle, plenum …
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Towards efficient and reliable infrastructure for machine learning
… autoscaling that employs multi-level backpressure mechanisms that distinguishes between interactive and batch requests. The framework dynamically adjusts batch sizes at the local level using reactive backpressure and makes global scaling decisions based on request waiting time …
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Miniature HCCI Engine Compressor
… W of compressed air power when working against a backpressure of 170 kPa. Two thermodynamic models of the air compressor were created which matched experimental results but did not capture all the details of compressor operation.
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Implementation of Refractory Foam Technology for Silencing Small IC Engines
… the areas of noise reduction, weight, size, and backpressure, compared to commercial designs. The final silencer design boasted an Aweighted overall sound pressure level that was 12.1 dBA lower than the reference case. This result was accomplished using nearly half the volume required by other …
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Implementation of Physiologic Pressure Conditions in a Blood Vessel Mimic Bioreactor System
… pump head and using a water column to backpressure the bioreactor chamber. Maintaining a desired backpressure within the system necessitated the development of a new bioreactor chamber with increased extraluminal leak pressure resistance. The opportunity was also used to further improve …
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Application of probabilistic deep learning models to simulate thermal power plant processes
… of utility-scale air-cooled condenser (ACC) backpressure. The effects of ambient conditions and plant operating parameters, such as extraction flow rate, on ACC performance is investigated. In both case studies, hyperparameter searches are done to determine the best performing architectures …
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Numerical Model Studies of Enhanced Geothermal Systems
… evaluate a similar model but with an increased backpressure in the reservoir.The second task is a challenge problem with multiple fractures in Fenton Hill Phase II. The geometry of the fractures had to be determined from the literature data that included dip, strike and depth information. …
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Individual and synergistic effects of lubricant additive (Ca, Mg, Zn) combinations on ash characteristics and DPF performance
… the filter becomes restricted and an engine backpressure results. Engine performance and fuel economy are reduced, requiring the DPF to be cleaned or replaced. While the detrimental effects of ash on DPF performance and therefore fuel economy can be illustrated and quantified, there is much …
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Direct Methanol Fuel Cells Using Pure Methanol
… other factors such as the use of pure oxygen, backpressure, and operating temperature will be tested to achieve superior peak power density compared to conventional DMFCs. These approaches will be detrimental to the success of the DMFC, increasing their attraction as an energy source due to …
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Modeling, simulation, and fabrication of a PZT valveless micropump
… micropump is developed. The flow rate and backpressure are the most important performances for the valveless micropump. Considering nonlinear pressure loss in the nozzle, a numerical simulation method is chosen to study the valveless micropump performance. The simulation is studied in low …
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