electronic bearing
1.ARPA marks consist of fixed range marker, variable range marker, electronic bearing line, guard zone, heading-line, parallel index(4 navigation lines), vector lines(or PAD) and past track information of tracked target ships, marks of trial manoeuvres, ect.
2.Syntheses of ??diimine and 2-aminopyridine transiting metal complexes bearing 2,6-unsym-substituents on the aryl, and investigation on the steric and electronic effects of the unsym-subatituents on the catalytic property.
