A new kind of weak Noether symmetry is obtained that arises in the study of Birkhoffian systems.The conserved quantities,which includes Noether conserved quanti
Multi-modular system plays an important role in power system architecture because low voltage and low power converters can be connected in any combination paral
The relationship between the hardware requirement of digital down converters(DDCs)in ultra-low symbol rate receivers and the word length is studied.Through anal