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 20 of 27 for “"Operating Strategies"”.
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Modeling rail freight operations under different operating strategies
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Operating strategies for economizer control in an air conditioning system
… system is investigated in this paper. New operating strategies of the economizer are proposed. An economizer consists of three coupled dampers--an outdoor air, a recirculation, and a discharge damper--controlled so that the amount of outdoor air may be varied from a minimum to 100% of the …
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Agent based modelling and simulation of operating strategies of generators and loads in wholesale electricity markets
An intelligent agent-based computational approach combined with traditional optimization techniques forms a powerful simulation platform to investigate performance of a wholesale electricity market and behaviour of its participants. Modern deregulated wholesale electricity markets consist of …
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On the determination of stochastic reservoir operating strategies incorporating short and long term information in real time.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Civil Engineering.
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Design and operation of a last mile transportation system
… Systems. The second part of the thesis studies operating strategies for LMTS. Routes and schedules are determined for a multi-vehicle fleet of delivery vehicles with the objective of minimizing the waiting time and riding time of passengers. A myopic operating strategy is introduced first. Two …
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Logistics barriers for multinational corporations doing business in China
… as case studies. The thesis analyzes their operating strategies and solutions to various problems they encountered in China and makes some recommendations.
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Aluminium smelting cell control and optimisation
… and superheat. However, spatial and temporal operating strategies cause changes in temperature, which usually result in variations in superheat as well. Contrasting, in the long term, for mature cells the aluminium fluoride consumption is fairly accurately reflected by the soda and calcium …
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Investigation of digital pump/motor control strategies
… can achieve efficiencies higher than 90% when operating at maximum displacement; however, as the displacement drops, the efficiency of these units drops to below 50%. A new digital pump/motor design aims at increasing these efficiencies by utilizing two electrically controlled high speed on/off …
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Identification of high "risk" pedestrian locations
… crashes and to identify appropriate design and operating strategies to enhance pedestrian safety. Crash data from Clark County, Nevada, were used to develop and to validate the proposed methods to identify high risk pedestrian locations. The results showed that the top 10 high "risk" locations …
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Optimizing Integrated Continuous Biomanufacturing Throughput: Resource Constraints and Process Scheduling
… levels. Finally, the thesis will evaluate new operating strategies, based on the new-found system understanding, which strive to decrease volatility of system throughput. The methods used in this thesis aim to cut through daily variability to understand fundamental production requirements. …
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Developing a PV and Energy Storage Sizing Methodology for Off-Grid Communities
… is restrictively expensive. Historically, operating off-grid requires an 'isolated self-consumption' operating strategy where any excess generation is wasted and to ensure reliability you must install costly, polluting generators or a large amount of energy storage. With the advent of …
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Carrier strategies in the spot trucking market
… for long haul routes. We tested selection strategies that disintegrated the four load parameters and incorporated owner-operator preferences in a computerized simulation. We found that strategies combining two or more of the identified parameters provide better results in terms of revenue …
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Simulating service reliability of a high frequency bus route using automatically collected data
… and are also experimenting with a variety of operating policies to improve service reliability. This research develops a simulation model of high frequency bus service in order to study the causes of service unreliability and strategies to alleviate it. The model is designed to be used in …
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Reliability and cost/worth evaluation of generating systems utilizing wind and solar energy
… risk index distributions and different operating strategies associated with diesel generation in small isolated systems. Deterministic and probabilistic techniques are combined in this thesis using a system well-being approach to provide useful adequacy indices for small isolated systems …
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Dynamic performance of control loops and their interactions in a VAV HVAC system
… focus on local control loop interactions and operating strategies for VAV control systems. To reach this objective, experiments were conducted in a two-zone VAV test facility. The facility consists of six control loops (cooling valve, fan speed, two dampers, two electric heaters) activated by …
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Thermally Aware, Energy-Based Techniques for Improving Data Center Energy Efficiency
… efficient placement of the IT load amongst the operating servers in the data center and operation of the cooling infrastructure. The approach uses real-time temperature measurements at the inlet of the racks to remove IT load from the servers with the warmest inlet temperature (or add load to …
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Modelling, Simulation and Optimisation of Multistage Humidification and Dehumidification Desalination Plant Using Solar Energy. Performance Evaluation and Improvement of the Humidification-Dehumidification Desalination Process through Modelling, Simulation and Optimisation Techniques
… the energy-efficient design principles and operating strategies for the maximum performance of the system. Finally, a two stages HDH hybrid system that uses solar and biomass as source of energy is proposed whereby, an optimisation problem is solved to achieve the optimum RR. A maximum of 2 …
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Strategies for oil and gas companies to remain competitive in the coming decades of energy challenges
… gas companies espouse four common industry-wide strategies of Portfolio Management, Operational Efficiency, Financial Management and Sustainability-of which the first three are core operating strategies of oil & gas companies. The companies have derived their profitability, growth, and …
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A Bioelectrochemical Sensing System for Measuring Acidic Bioprocess Fermentation End Products
… mechanisms. This study also revealed various operating strategies to inhibit methanogenesis in MFCs enriched with individual VFA and enhanced degradation of recalcitrant fermentation end products, which could contribute to further increasing the overall performance of the proposed sensor …
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Metabolic flux analysis and population heterogeneity in mammalian cell culture
… specific culture environments and to formulate strategies for increasing cell culture performance. Mitochondrial characteristics associated with respiration, membrane potential, and apoptosis along with physiological state multiplicity involving both metabolism and apoptotic death played a key …
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