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 29 for “"Short circuits"”.
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Sahraei failure criteria for detection of short circuit in lithium-ion batteries
… fracture within battery cells, which can trigger short circuits, leading to thermal runaway and explosions. Consequently, understanding battery behavior under various loading conditions and developing predictive models for failure is essential for enhancing safety and optimizing protective …
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In-System Testing of Configurable Logic Blocks in Xilinx 7-Series FPGAs
… permanent faults within the FPGA fabric, such as short circuits and open circuits in FPGA transistors that arise from electromigration effects. Several Built-In Self-Test (BIST) techniques have been proposed in the past to detect and isolate such faults. These techniques suffer from routing …
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Bipolar Pulse Conductance Measurements With Ion-Selective Electrodes
… most respects; the conductometric method simply short-circuits the ISE potential and allows it to generate a current that is measured along with the current induced by the voltage pulse. Therefore, working curve detection limits, linear ranges, and general shapes are quite similar, as is the …
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Air leakage in underground mine ventilation
… more than half of the fresh air entering a mine short-circuits to the return airways before reaching the working faces. Consequently, large leakages create an additional demand for increased intake air, which substantially affects the efficiency of a mine ventilation system. In this study, two …
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Understanding and Controlling Failure Mechanisms of the Zinc Anode for Rechargeable Alkaline Batteries
… such as the hydrogen evolution reaction (HER), short circuits, or gas crossover cause the Zn anode’s charging efficiency to average 92% but be as low as 86%, which in turn causes the baseload of metallic Zn to gradually disappear. Cell failure usually occurs after the baseload of metallic Zn is …
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Study of Pulse Electrochemical Micromachining using Cryogenically Treated Tungsten Microtools
… to ensure higher machining accuracy with lesser short circuits. By using optimum cryogenic cycle parameters, 200% increase in material removal rate, and 45% reduction in tool wear was achieved in the pulse electrochemical micromachining of tungsten carbide metal matrix composite using …
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Inrush transient generation and line impedance estimation
… rather than using capacitors, inductors, and short circuits. Non-parametric impedance estimation is also demonstrated. Inrush transients, and other transients generated by switching the load on and off rapidly, generate current with wide-bandwidth spectral content to replace previously used …
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Segurança de sistemas de potência em regime transitório considerando incertezas
… represent faults of great impact (e.g short-circuits), whose characteristics (e.g type, location, duration) are probabilistically modeled. It is possible to perform analyses enclosing uncertainties only in scenarios, only in disturbances and the hybrid case, combining uncertainties in …
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ANALYSIS OF COMPOSITE A-C AND D-C SYSTEMS
… dissymmetry produced by unbalanced capacitor short circuits. The performance aspects of d-c transmission links have also been examined and the mathematical models of unbalanced convertor operation using constant firing delay- and equidistant firing control have boon developed. The effect of …
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Improving base metal electrowinning
… reduces anode corrosion but also leads to short circuits and maintenance issues. MnO<sub>2</sub> is thought to interact with chloride ions and produce oxidized chlorine species. The interactions between Mn and Cl are not well understood. Bench scale experiments were conducted to investigate …
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Simultaneous Multiple Plane to Plane Waterflooding in Fractured Tight Reservoirs
… through in any individual displacement could short-circuit the displacement, and multiple short-circuits can cause poor pattern recovery efficiency. The proposed 3-well pattern offers a way to avoid well to well short-circuiting through propped fractures and enables a large number of …
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Single Well Completion and Management Strategies for Enhanced Recovery of Tight Oil Using Miscible Gas Injection
… fluid failed in tight oil largely due to short-circuits along fractures connecting adjacent injection and production wells. As an alternative, operators have tried alternating miscible gas injection with production in a single well mimicking the huff-and-puff (HAP) technique that …
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Material characterization of high-voltage lithium-ion battery models for crashworthiness analysis
… mechanisms of thermal runaway caused by internal short circuit. In phase one, medium and large sized cells at low state of charge (SOC) were impacted or compressed while measuring punch load, displacement, cell voltage, and surface temperature until an internal short circuit was detected, followed …
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Transmission Line Dynamics Modeling For Power Electronics-Enabled Control in the Electric Power Systems
… This work presents techniques to protect from short circuits in response to load disconnections, and introduces DC circuit breaker configurations to cause current commutation. In the modern day, power systems operators possess the technology to implement fast control of dynamics, however, due …
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Hierarchical Decentralized Control for Enhanced Stability of Large-Scale Power Systems
… power systems subject to large (e.g., short circuits) and small (e.g., small load changes) disturbances. We study system robustness by calculating local stability margins. We derive decentralized control laws that guaranty global asymptotic stability by applying Lyapunov's second method …
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Risk Management of Cascading Failure in Composite Reliability of a Deregulated Power System with Microgrids
… cascading failures due to relay over-tripping, short-circuits induced by overgrown vegetation, voltage sags, line and transformer overloading, transient instabilities, voltage collapse, to cite a few. How to control the economic losses of blackouts is gaining a lot of attention among power …
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Olfactory Ethics: The Politics of Smell in Modern and Contemporary Prose
… worth and status in an inarguable manner that short-circuits conscious reflection. This can be accounted for by acknowledging olfaction’s strongly affective nature, which produces such strong bodily sensations and emotions that reflexivity is bypassed in favour of a behavioural or cognitive …
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Advanced Ignition Strategies for Future Internal Combustion Engines with Lean and Diluted Fuel-Air Mixtures
… carried out with air as the background media. Short circuits and restrikes were observed under air flow conditions. The frequency of these occurrences increased with increased air flow velocity. The length of the spark plasma increased, due to the stretch of the plasma channel by the air flow. …
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