The international standard for High Definition Television (HDTV) in MPEG- 2 has been established for a few years. Some industrialized modern countries are posit
Using F2 population derived from the cross of tall inbred 7922 by dwarf inbred 5003, an RFLP linkage map of maize has been constructed, on which 85 markers are
Type WYZ-97 eighteen-information noninsulate frequency-shift automatic blocking system is the most advanced railroad signaling system in China nowadays.The arti