The joint venture of Chinese auto companies for 20 years has made the Chinese "sedan dream" no longer a fairy tale in winter. This is the joint venture's contribution to the Chinese auto industry. Photo by Liu Jianmin Starting from July 1, the tariffs on imported cars from China wil
Nature Physics online published an article entitled "Anti-Parity-Time Symmetry with Flying Atoms" by Xiao Yanhong's group at Physics Department of Fudan University. It reported that for the first time in this group, Sex (Anti-PT Symmetry) Optical Hamiltonian Related Results. The work
　  1, gear pump drive shaft and bushing repair after wear Gear pump drive shaft and bush wear with the gap increases, will certainly affect the pump oil.This situation can repair the drive shaft or bushing method to restore its normal fit clearance.If the drive shaft wear slightly pr
In recent years, blockchain, big data, machine learning, and driverless technologies have developed rapidly. Blockchain, as one of the emerging technologies, has increasingly exhibited new features as the development process continues. Since 2017, the topic of blockchain has been hotly debated. By
In recent years, blockchain, big data, machine learning, and driverless technologies have developed rapidly. Blockchain, as one of the emerging technologies, has increasingly exhibited new features as the development process continues. Since 2017, the topic of blockchain has been hotly debated. By