UNIVERSITY PARK, Pa. — Hummingbirds occupy a unique place in nature: They fly like insects but have the musculoskeletal system of birds. According to Bo Cheng, the Kenneth K. and Olivia J. Kuo Early Career Associate Professor in Mechanical Engineering at Penn State, hummingbirds have extreme aerial agility and flight […]
optimization in mechanical systems
Trade growth steady this year
A freight train in Jinhua, Zhejiang province, departs for Laos. [HU XIAOFEI/FOR CHINA DAILY] Demand likely to rebound in coming months on supply chain resilience China’s foreign trade will maintain a steady growth rate this year, despite headwinds from weakening overseas demand, said market watchers and exporters on Wednesday. Even […]