采用基于等离子体物理模型的时域有限差分方法模拟了金属薄膜近场成像特性；采用薄膜传输矩阵方法计算了金属薄膜对倏逝波分量的放大作用。
The property of the near field subwavelength imaging in a metal thin-film structure is investigated using finite difference time domain method based on Drude model.
结果表明，多参考点互相关差分模型能够有效地进行环境激励下的模态识别，并且多项式特征值法比增广矩阵法所得结果更好。
It shows that the presented method can be used to identify modal parameters effectively under ambient excitation and that the polynomial eigenvalue method is superior to the augmented matrix method.
比较原始矢量与参考矢量矩阵中的每个矢量之间的差分，找到最佳匹配点。
The template vector is compared with each vector in the matrix and the minimum differences found out between them.
给出了基于全非奇异矩阵的代替置换网络的差分概率上界。
The upper bound of the differential probability is developed for the completely nonsingular matrix based substitution permutation network.
主要的方法是利用矩阵差分方程的特征矩阵方程解的性质。
The main method is using the properties of the solutions of characteristic matrix equation.
差分方程隐式部分采用了LU- SGS方法以避免矩阵运算，对化学反应和振动能量源项采用预处理矩阵以解决刚性问题。
The LU-SGS method is used in implicit part of the difference scheme to avoid matrix operations. The preconditioning technique is used for solving stiffness problem.
灵敏度系数矩阵是通过有限差分方法近似计算得到的。
The sensitivity matrix was calculated numerically by the finite difference method.
针对矩阵变换器调制方式的特点，提出了基于输出电压误差函数分析的矩阵变换器离散调制技术，推导了基于时间离散和差分原理的电路方程。
Based on the output-voltage error function, a novel time-discrete modulation technique is proposed for matrix converters (MCs) and time-discrete difference equations of a MC circuit are derived.
第三章利用矩阵理论与重合度理论，讨论了一类非自共轭非线性二阶差分方程周期解的存在性问题。
Chapter 3 is centered around the existence of periodical solutions for non self-adjoint nonlinear second order difference equations by invoking matrix theory and coincide degree theory.
指出了使用大规模的基于全奇异矩阵的代替置换网络可有效地提高分组密码抗差分密码分析的安全性。
Therefore, using large completely nonsingular matrix based substitution permutation networks can effectively improve cipher security in relation to differential cryptanalysis.
利用中心差分公式计算终端参数对控制参数的敏感矩阵。
The sensitivity matrix of target parameters relative to control parameters is numerically computed using finite central difference formula.
利用中心差分公式计算终端参数对控制参数的敏感矩阵。
The sensitivity matrix of target parameters relative to control parameters is numerically computed using finite central difference formula.
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