With every launch of the new flagship, we see smartphone makers bringing greater display, more advanced biometric security features, enhanced camera features or AR/VR capabilities. However, the next big thing in the smartphone market is definitely a flexible smartph…
There are many car rental companies on the market, and their operating forms, types of rental vehicles, and service content are all differe…
Battery capacity increased by 60-70%, the volume is reduced by 2/3, cell phone standby time will increase exponentially; battery life of more than 300 km, so that the full popularity of electric vehicles possible ...... Reporter recently from Northwestern University graphene preparation te…
In the self-excitation excitation system, the generator excitation mode includes DC power supply excitation, AC power supply excitation, and residual voltage excitation. The first two are the process of injecting a certain direct current into the rotor coil after the generator has a boost…