In this paper, we use plane wave algorithm to study the band gap structure of 2D phononic crystal with square lattices.
采用平面波算法研究了二维正方点阵声子晶体的禁带结构。
The plane wave expansion method is introduced to calculate the band gap for two-dimensional solid phononic crystals with square lattices.
介绍了用平面波展开法计算二维正方点阵的固态声子晶体带隙的方法,研究不同截面形状的散射物对晶体带隙的影响。
Band gap structure of 2D phononic crystals with square lattices was studied by plane wave expansion method.
选取了5种不同材料组分和2组不同截面形状散射体的声子晶体作为研究对象,利用平面波展开法研究了二维固相双组分正方点阵声子晶体中z向剪切波的频率带结构,探讨了材料特性和截面形状对禁带的影响。
Resilient functions are constructed by applying orthogonal array .
相关免疫函数和正交矩阵的研究是等价的 。
The relationships between the dual distance of the code and the correlation-immune order are dis cussed in this paper,and a sufficient and necessary condition for the orthogonal array is derived.
本文讨论了码的对偶距离和相关免疫阶之间的关系，并且给出了正交矩阵的一个充要条件。
Several equivalent conditions of a normal matrix
正规矩阵若干判定及性质
The factorization of a complex skew-symmetric normal matrix,which is similar to a complex symmetric normal matrix,was demonstrated using a logically similar method.
提出一个复矩阵是对称酉矩阵的充要条件,并用逻辑上类似的方法证明一个类似于复对称正规矩阵的复斜对称正规矩阵的分解,最后对复斜对称矩阵得到了类似于复对称矩阵Takagi分解的结论。
The eigenvalues of a normal matrix are not sensitive to its elements perturbation.
基于正规矩阵特征值对其元素变化的不敏感性,讨论线性系统极点的正规配置问题,即设计状态反馈控制律,将闭环控制系统极点配置到期望位置的同时使闭环状态矩阵为正规矩阵,从而达到增强控制系统的鲁棒性的目的。
The method of constructing the sign patterns that allow orthogonal matrix is given.
给出蕴含正交矩阵的符号模式的一种构造方法,并证明了一类给定符号模式蕴含正交矩阵,最后对蕴含正交矩阵的符号模式中零元的个数进行了研究。
Research on the fast calculation model of positive definite matrix in-situ replacement;
正定矩阵原位替换快速解算模型研究
A sufficient condition of determination a real symmetry matrix into a positive definite matrix;
判定实对称矩阵为正定矩阵的一个充分条件
Oppenheim s inequality over real Symetric positive definite matrix;
实对称正定矩阵上的Oppenheim不等式
Band structure of phononic crystal constructed by Fibonacci super-cell on square lattice
正方点阵上Fibonacci超元胞声子晶体的带结构
PWM is introduced to calculate the phononic band gaps for two? dimensional liquid phononic crystals with square lattices.
介绍了计算二维正方点阵液态声子晶体带隙的PWM法。
Regular Value and Point Specyrum of Kolmogorov Differential Equations;
Kolmogorov微分方程组系数矩阵算子的正则值和点谱
indices of lattice plane and lattice direction
点阵平面指数和点阵方向指数
cubic (lattice) cell
立方晶胞,立方点阵晶格
That is where adaptive antenna arrays come in.
这正是适应型阵列天线的切入点。
It was the timing that raised eyebrows.
正是时间节点问题引起了一阵唏嘘。
The ～*Congruence Class of the Solutions of Matrix Equations and Generalized Inverses of a Normal Matrix;
矩阵方程的合同类解与正规矩阵的广义逆
Inverse Problem of Matrix Equation of AX=B on the Sub-generalized Positive Definite Matrix;
矩阵方程AX=B在次广义正定矩阵类上的反问题
Direct method for updating damping and stiffness matrices
阻尼矩阵与刚度矩阵的一种直接修正方法
Hinting, additional guideline information stored in the fonts for rasterizers to fit the curves in a way that preserves the proper glyph shape.
用字体中储存的附加指导信息进行点阵化，以便用保持正确符号形状的方式拟合曲线。
a square matrix whose determinant is not zero.
决定因素不为零的正方形矩阵。
a square matrix whose determinant is zero.
决定因素是零的正方形矩阵。
Hermitian Positive Definite Solutions of Two Classes of Nonlinear Matrix Equations;
两类非线性矩阵方程的Hermite正定解
The Hermitian Positive Definite Solutions of Matrix Epuation X+A~*X~(-q)A=Q When q＞0;
矩阵方程X+A~*X~（-q）A=Q（q＞0）的Hermitian正定解
The Research of Decision-making Method Based on Reciprocal Judgment Matrix;
基于正互反判断矩阵的决策方法研究
Positive Definite Solution of the Matrix Equation X+A～*X～(-n)A＝I;
关于矩阵方程X+A～*X～（-n）A＝I正定解
The Metapositive Definite Solution of the Matrix Equation AXA~T+BYB~T=C;
矩阵方程AXA~T+BYB~T=C的广义正定解