Abstract: The optical return-stroke speed calculation is vital to analyze the lightning development process. The traditional calculation methods of lightning optical return-stroke speed, including the ...

Abstract: Performance evaluation is one of the most important methods to guarantee the safe and reliable operation of complex systems. Currently, there are three main problems in the performance ...

Elysse Bell is a finance and business writer for Investopedia. She writes about small business, personal finance, technology, and more. Erika Rasure is globally-recognized as a leading consumer ...