＜正＞Energy efficiency,motivated further by environmental and economic concerns,has been a progressively important topic of extensive research interests in recent years,which finds its research in all sectors ranging from fundamental sciences to government policy-making and management.With its myriad researches,emerging techniques and applications have sprung up in various fields,such as energy-saving materials and devices,low-power circuits and systems,energy-aware and energy-efficient computing,energy-efficient communications and networking,and efficient power engineering.Being invited by Journal of Electronic Science and Technology,we proposed this special section on Energy-Efficient Technologies（EET）.I am honored to serve as the Guest Editor.From this issue,the JEST special section on EET becomes a routine section of the journal,and the focus of each issue will be placed on a dedicated sub-topic.This issue concerns Energy-Efficient Design of Integrated Circuits and Systems.We are expecting that the
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