400 00 100 600 800 1000 gn=-0.803901+0.481211n fn=en=0.447581×1.61803″ 2021/1/212021/1/21 200 400 600 800 1000 100 200 300 400 gn = −0.803901 + 0.481211n g n n n f = e = 0.447581 1.61803