finite gain有限增益finiteadj.有限的finite element numerical method有限元计算finite and discrete mathematics有限数学和离散数学finite time convergence control有限时间收敛finitely generated free modules有限生成自由模finite element thermal analysis有限元热分析Finite Difference-Time Domain时域有限差finite dimensional distribution有限维分布finite word-length arithmetic[计] 有限字长运算Finite-conductivity fractures有限导流垂直裂缝finite difference time-domain时域有限差分