1.The essay analyses free vibration problem of laying bed build-up board of antisymmetry angle with spline finite element method.

1.本文有限元法,分析了反对称角铺设层合板的自由振动题.

2.Some properties of adjoint matrix are discussed. The properties are symmetry, antisymmetry, positive definite, positive semi-definite, orthogonal and characteristic value.

2.摘要讨论了伴随矩阵在对称、反对称、定、半定、、似和特徵值等方面的性质。