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 67 for “"accumulator"”.
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ATRAP Buffer-Gas Positron Accumulator
The ATRAP collaboration has been creating antihydrogen, the simplest antimatter atom, since 2002 and has a long-term goal of performing precision laser spectroscopy on these antihydrogen atoms. ATRAP has produced antihydrogen by positron cooling of antiprotons and by a laser-controlled …
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Accumulator-based three dimensional building boundary reconstruction framework for satellite images
… the detected edges. From the first objective, an Accumulator Based Edge Detector (ABED) framework was developed that aggregates edges by automated parameter tuning. Good edge localisation is maintained by a localisation filter during edge aggregation while keeping salient edges. ABED introduces …
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A novel approach for treating resistant hypertension using a controlled-pump accumulator relief device
… a novel idea of implementing what we called the accumulator device, which may be classified as a mechanical assist device for the cardiac system. A lumped-parameter model describing the cardiovascular system is presented and validated. The novel idea of accumulator device is also modeled and …
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Design of dynamically controlled desktop fiber accumulator with tension feedback as part of smart manufacturing educational kit
… of this research is to develop a desktop fiber accumulator with a dynamic controller that monitors fiber tension as part of a smart manufacturing educational kit. A Winding Loop Material Accumulator, WiLMA, is designed and tested as a machine whose main purpose is to be an effective buffer for …
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Characterization of the intraspecific variation within the nickel (Ni) hyperaccumulator species Senecio coronatus (Asteraceae): a preliminary analysis of genetic population structure and shoot proteome expression
Heavy metal (HM) accumulator plants possess the ability to actively hyperaccumulate and detoxify exceptionally high concentrations of metals in their aboveground tissues, without exhibiting any apparent signs of toxicity. Despite nickel (Ni) hyperaccumulator plants representing the largest …
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Behavior of Magneto-Rheological Fluids Subject to Impact and Shock Loading
… piston and a mono-tube with nitrogen accumulator. To separate the dynamics of the MR fluid from the dynamics of the current source, each damper received a constant supply current before the impact event. A total of five supply currents were investigated for each impact velocity. After …
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A pneumatic semi-active control methodology for vibration control of air spring based suspension systems
… containing an air spring, air flow valve, and an accumulator, where the spring and damping functions are combined into one package. The spring and accumulator provide the spring characteristics, and the computer controlled adjustable valve provides the damping characteristics by automatically …
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Using Vibration Analysis to Determine Refrigerant Levels In an Automotive Air Conditioning System
… the hypothesis that the natural frequency of the accumulator bottle is a function of the mass of refrigerant in the system. Applying this theory to a working automotive air conditioning bench test rig involved using the roving hammer method—forcing the structure with an impact hammer at many …
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A novel hydraulic energy-storage-and-return prosthetic ankle : design, modelling and simulation
… of research prototypes that use a hydraulic accumulatorto store and return energy, but these turn out to be highly inefficient because they useproportional valves to control joint torque. Nevertheless, hydraulic actuation is ideally suitedfor miniaturisation and energy transfer between joints …
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Experimental and analytical investigation of refrigerant and lubricant migration
… condenser, plate and fin evaporator, U-tube type accumulator and fixed displacement compressor-was measured across five sections divided by ball valves. Using the Quick-Closing Valve Technique (QCVT) combined with the Remove and Weigh Technique (RWT) using liquid nitrogen as the condensing agent …
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Bond graph modeling of hydraulic circuits on a sweet sorghum harvester
… onto a cross conveyor and deposited into an accumulator. Periodically the machine stopped and the accumulator was dumped. All the components on the harvester are powered hydraulically. Five pumps on the harvester supply flow to seven actuator circuits. Power is delivered to the pumps from the …
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Development of a digital twin for demo cooling system
… pumped fluid systems, known as Two-phase Accumulator Controlled Loop (2PACL) systems, have continued to enjoy extensive research and exploration at CERN. The system offers operational specifications that arise as a results of the High Luminosity upgrade. These include the need to operate …
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Algorithms and low-power hardware for image processing applications
… factored computation. The PE consists of an accumulator array, row decoder, and output combination block. Modifications to the row decoder can allow for reconfigurability of the compressed weight bit-widths. Several common layer operations in CNNs are described and mapped onto the proposed …
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Leading Digit Computation Circuits
… allow for early computation termination: an accumulator, a comparator and an arithmetic processing element. The circuits are constructed based on a novel carry propagation shift-register design. Results for various size inputs show a decrease in the number of clock cycles necessary to make a …
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Asset trajectories and child outcomes: Implications for asset-based policies
… asset increases over the same period: Low Accumulator class). The results further indicate that children from the other asset trajectories have better outcomes compared to children from the Low Stable class. In addition, children from the Low Accumulator class have similar outcomes compared …
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Modifications and upper extremity orthotics for the Lofstrand crutch
… the device stores the pneumatic energy into an accumulator. Data were collected using a pressure transducer. A mathematical model of pressure in the accumulator was developed in order to predict accumulated pressure as a function of effective volume of the piston and dead volume in the system. …
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An Advanced Controller for a Semi-active Wheelchair Suspension
… proportional solenoid valve, and a custom made accumulator. Several controller designs specific to semi-active suspensions were designed and tested. The controllers investigated were skyhook, acceleration driven damping, and a combined control law employing both a dual and single sensor version. …
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Design and Implementation of the Kinect Controlled Electro-Mechanical Skeleton (K.C.E.M.S)
… this, research papers about the formula hybrid accumulator design and the 2010 autonomous surface vehicle were presented and published.</p>
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Secondary loop reversible AC/HP system for electric vehicles
… loops, and uses the identical compressor and accumulator as the baseline DX system. For most operating conditions in this study, the secondary loop system has slightly lower maximum capacity and lower COP/HPF compared to the DX system, while it has potential for integrated thermal management, …
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