Sparse arrays designed based on fourth-order difference co-array (DCA) can achieve significantly higher uniform degrees-of-freedom (uDOFs). However, most existing fourth-order sparse arrays do not ...

Costas arrays are fundamental to the operation of radar and sonar systems, yet it is still an open problem how to generate a Costas array for an arbitrary length. A way to improve computer search is ...

The rapid development of wearable electronics urgently requires a wearable energy-harvesting technology that can convert mechanical energy from body movements into electricity. In this paper, a novel ...

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