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2018-2022, the study reveals a negative influence of COVID-19 on the performance of energy sector companies across all … firm size, liquidity, and capital structure, in shaping the performance outcomes of energy sector companies. …This study provides a comprehensive analysis of the global impact of COVID-19 on energy sector companies, taking into …
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for two reference frames. For an electric train, exergy losses can be related to the energy flows during dynamic processes …The paper illustrates some aspects of energy conversion processes during underground electric train operation. Energy … conversion processes are explained using exergy, in order to support transport system sustainability. Loss of exergy reflects a …
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