( ()) [1, 2, 3, 6]. (1.3) V S. V + S : , M xi, yi, zi, i =1, M. ua (1.3) (1.1).
S : S = S 1+ S 2. S 1 u:
u = , (1.4)
S 2 u:
n *L u n **L u = . (1.5)
(1.4) ( ), (1.5) ( ). PDE (1.3) u .
(1.1), (1.3) :
L ([ N ]*[ u ()]) d V = f d V. (1.6)
[ u ()] . L z, z 1 [ N ] [1], z , , (1.6).
[1] , (1.6)
*(D [ N ]) d V *[ u ()] + d S,
E D , L. [ N ].
(1.6) [ K ]*[ u ()] = [ F ]. (1.6) . ( ), . , [10 .]. , , . , - .
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