阵

In particular, they present an open problem: the characterization of the representable discrete polymatroids, that is, which discrete polymatroids are representable?

在文中，他们给出了一个开放性问题：可表示的离散多拟阵具有的特性，即哪些离散多拟阵是可表示的，哪些是不可表示的。

The characteristic vector of the real symmetric matrix should be found out, which is orthogonalized and normalized to a standard orthogonal base and is used as row vector to construct the transformation matrix P, so the P~(-1)AP can be made into diagonal matrix.

实对称矩阵A经相似变换P-1AP可化为对角矩阵，在x =Py 下，不一定能化A的二次型为标准型；应寻求对称矩阵A的特征向量，将其正交化并单位化作为标准正交基，作为列向量构造变换矩阵P，可使P-1AP=Λ为对角阵，在x =Py 下，要将二次型化为标准型，且二次项系数即为对角阵Λ主对角线上元素。

The algorithms estimate the DOA of the broadband distributed source fron the secondary diagonal elements of the covariance matrices generated from every frequency domain of the received broadband signal s, thus avoiding unwrapping of phases.

该类算法首先将阵列接收的宽带信号变换到频率域，然后对于每个频率形成阵列接收信号协方差阵，最后由该协方差阵的次对角线元素估计宽带分布源的到达角，其主要特点是避免了相位展开。

The battle broke out, Takeda's cavalry in the plains on stirring up a whirlwind mission, whistling a letter to the chief, of the Tokugawa Front coalition forces hit until the array of 500 meters, iron artillery started shooting, the bullet-perforated the Emergency Knight's body, and then came tumbling down and the horse.

会战爆发后，武田的骑兵在平原上刮起一团旋风，呼啸着向信长、德川联军本阵袭来，等到了本阵500米的地方，铁炮兵开始射击，密集的子弹洞穿了冲锋的骑士身躯，然后人和马轰然倒下。

The application of H〓 control theory in robust control of sonar array servo system is studied in the thesis. The solution of singular H〓 control problem is investigated deeply, and the problem of sonar array servo system's generalized system being singular is solved. Numerical simulation is carried through at last.

本文还对H〓控制理论在声纳基阵伺服系统鲁棒控制中的应用进行了理论研究，对奇异H〓控制问题的解法进行了较深入的研究，并解决了猎雷声纳基阵伺服系统增广系统为奇异控制对象的控制问题，最后进行了数字仿真。

When he was born, the doctors all laughed at him. That laughter gave Eric a rush…or it could have been the snipping of the umbilical cord…either way, at the age of seven seconds he knew what he wanted to do when he grew up…Later in life, at the ripe age of 8, he learned how to tinker in his dad's workshop…or as Eric used to call it,"Dad's Magical Tool and Gadget Nirvana."At 16, probably after ingesting some paint chips, he decided to make day dreaming and performing comedy a career.

在他出生之时，所有的医生都笑他，这阵笑声使其慌张…或者说这阵笑声剪断了脐带，就在他七岁那年，他便知道他长大后想要做什么…随后，在他成熟的8岁那年，他在爸爸的作坊里学做焊工…用艾瑞克总说的话，"爸爸神奇的工具的天堂"。16岁那年，就在吞下一些油漆片后，他决心投身于喜剧事业。

Both the offset and tilted fedcoupling-slot array between the curved guide and sectoral guides and longitudinal radiating-slot array on sectoral guide are analyzed by moment method, taking into account of the effects of finite wall thickness and mutual coupling between the slots, employing the acceleration algorithms to accelerate the summation of slowly convergent series of the self-admittance of the waveguide-slot aperture, and introducing the surface Fock functions to simplify the computation of the self-and mutual coupling of the slots on the surface of cylinder.

采用矩量法分别分析弯波导与扇面波导间偏置倾斜馈电耦合缝阵和扇面波导轴向辐射缝面阵，其中计及有限波导壁厚及缝间互耦的影响，运用级数加速算法对波导中自导纳矩阵元级数进行加速处理，并引入表面Fock函数简化圆柱面上缝口面的自耦和互耦的计算。

The algorithms of MUSIC and ESPRIT are introduced, which are the most important algorithms in array signal processing. A method is proposed to make the estimation of the covariance matrix become Toeplitz matrix using the Toeplitz characteristic of covariance matrix.

第2章建立了阵列信号的模型，主要分析了两种无方向模糊的阵列：阵元数大于6的均匀圆阵和非均匀L形线性阵列，并讨论了非均匀L形线性阵列无模糊设计的方法；然后介绍了在阵列信号处理中，两种最主要的算法：MUSIC算法和ESPRIT算法。

Then, in the procedure of triangulation, we introduce the concept of front splitting and discontinus increasing, so that the procedure can be used to form triangular elements within muti-connected domains with arbitrary boundaries and nodes without any regularity.

然后，在将内部结点和边界结点连成三角形的阵面法中提出了生成阵面增长和分裂的概念，使得该方法能够适应于结点疏密程度变化很大的任意边界内的三角形网格的生成，并能够自动处理多连通域问题。

In this paper, we consider the following computing method of tridiagonal matrix:(1) decoupling of linear equation;(2) determination of determinant and eigenvalue-eigenvector relation;(3) matrix inversion.

二引宫在数值计算中，有许多问题足后归结为三对角矩阵的计算涸此研究它们的计算方法是有意义的。此外，有些三对角阵的计算方法可以做为带状阵计算的借鉴。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。