9200921021-19211 ∑()1-E"81a0=0 E 3ae800)/ao -3ae -E 0 E Eϕ200 ϕ210 ϕ21−1 ϕ211 1 0 1 0 () ( ) ij ij j j ˆ ∑[(H ) E ]a − δ = 1 0 0 1 1 0 0 2 1 0 3 1 0 4 3 00 3 00 0 00 0 0 00 ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) E ae a ae E a E a E a ⎛ ⎞ − −ε ⎛ ⎞ ⎜ ⎟⎜ ⎟ − ε− ⎜ ⎟⎜ ⎟ = ⎜ ⎟ − ⎜ ⎟ ⎜ ⎟⎜ ⎟ ⎝ ⎠ − ⎝ ⎠