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In this article, thermal performance of AC-LED light engine driven by segmented linear constant current was analyzed, based on the results of transient temperature rise measurements using infrared camera. Compared with DC-LED, AC-LED chips can be driven by AC voltage without the transformer and rectifier circuit. While, AC-LED light engine presented the characteristics of high efficiency, high power...
Traditional design patent verification based on manual comparison is too labor-intensive, time-consuming and subjective to be applied efficiently in practice. Design patent image retrieval system is designed to retrieve some similar patent images with much visual similarities. Structured features and multiple feature fusion are two main technologies to ensure the retrieval accuracy in the system....
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