With the aging of Lithium-ion batteries (LIBs) of electric vehicles in the near future, research on the second use of retired LIBs is becoming more and more critical. The classification method of the retired LIBs is challenging before the second use due to large cell variations. This paper...

Background: UAVs (Unmanned Aerial Vehicles) and SUGVs (Sidewalk Unmanned Ground Vehicles) are two prominent options to revolutionize last mile home delivery. However, there is no literature yet addressing a comprehensive assessment of them. To bridge this research gap, this paper aimed to...

Using a sample of 124 countries assisted by China from 2000 to 2019, this paper examines the impact of foreign aid on outward foreign direct investment (OFDI) and the mitigation mechanism of risk. The research finds that, first, foreign aid can significantly reduce the country risk of recipient...