子阵

The idea of operation in beam-space and coherent subspace method were introduced into acoustic vector array signal processing.

把声压阵的波束域高分辨算法的思想和相干子空间方法的思想引入到声矢量阵列信号处理，在MichaelZoltowsk提出的矢量阵的数学模型的基础上推导出了声矢量阵波束域宽带聚焦MUSIC算法，并作了计算机仿真研究。

Based on the depth research on extension array manifold of uniform circular, for some uniform circular arrays which had subarrays with the nature of rotational invariance and had the nature of central symmetry two ESPRIT algo-rithms were presented, the first algorithm reduced one time of SVD, the second algorithm avoided parameter pairs.

在深入研究均匀圆阵扩展阵列流形的基础上，针对某些均匀圆阵的扩展阵列中含有旋转不变性的子阵列组以及中心对称性质，提出了2种基于均匀圆阵的二维ESPRIT算法，第一种算法减少了一次奇异值分解，第二种算法避免了参数配对。

The rank function is introduced for poset greedoids on the base of poset matroids,and the closure operator s are defined and a series of properties of closure operaters of poset greedoids are discussed.

在偏序集拟阵的基础上，引入了偏序集广义拟阵的函数，定义了偏序集广义拟阵的闭包算子，讨论了偏序集广义拟阵的一系列性质。

This thesis including four chapters: Chapter Ⅰ, Introduction: Chapter Ⅱ, bases and Circuits of Poset Matroids; Chapter Ⅲ, A Class of Functions Associated with Poset Matroids: Chapter Ⅳ, Dependence and Closure Operator of Poset Matroids.

本文包括四章内容，第一章，引言。第二章，偏序集拟阵的基和圈。第三章，一类与偏序集拟阵相关的函数。第四章，偏序集拟阵的相关性和闭包算子。

The study includes the fuzzy independent set, fuzzy bases, fuzzy circuits, fuzzy rank, fuzzy hyperplanes, fuzzy closure operator, fuzzy submatroid, quasi-fuzzy graph matroids, fuzzy graphic matroids, fuzzy dual matroid and so on.

研究的内容包括模糊拟阵的独立集，模糊基，模糊圈，模糊秩函数，模糊超平面，模糊闭包算子，模糊子拟阵，准模糊图拟阵，模糊图拟阵，模糊拟阵的对偶和模糊拟阵的运算等等。

The study includes fuzzy bases, fuzzy circuits, fuzzy rank function, fuzzy hyperplanes, fuzzy closure operator, fuzzy submatrods, quasi-fuzzy graph matroid, fuzzy graphic matroids, fuzzy dual matroid and so on.

研究的内容包括模糊拟阵的模糊基，模糊圈，模糊秩函数，模糊超平面，模糊闭包算子，模糊子拟阵，准模糊图拟阵，模糊图拟阵，模糊拟阵的对偶等等。

The vactrix method is further developed, a vectrix Skew-symmetric crossproduct identity is presented and the dyadic form of the derivative of a vector with respect to another vector in terms of vectrix is also offered.

进一步发展了矢阵方法，提出了矢阵叉积算子恒等式及矢量相对于矢量的导数以矢阵表示的并矢形式，并给出了若干应用实例。

It has two characteristics:① the preclude phase\|locking staircase to type V intermittency before entering chaos includes the traditional\|like and multiple\|like devil′s staircase structures;② the chaotic attractor appearing after the staircase always is the end\|results of the image set of the discontinuous borderline.

这类系统中的 V型阵发有两个特点：1系统进入混沌之前展示的 V型阵发前奏锁相阶梯同时包含类似传统魔梯和多重魔梯的结构；2锁相阶梯之后出现的混沌吸引子总是不连续边界象集的归宿

Basing on the existing theory of crisp matroids and fuzzy matroids, the paper studies mainly fuzzy rank function and fuzzy submodularity function, The main contributions of the pap...

本文在现有拟阵和模糊拟阵理论的基础上主要研究了模糊秩函数以及模糊子模函数等内容，现分述如下：(1)从传统的子模函数出发，定义了模糊子模函数。

The purpose of this thesis is to reserch and design a digital fish torpedo SONAR pulse detect system, to solve some defect which exist in traditional SONAR, to accomplish real-time detect the aim and judge the aim's type and estimate the center frequency, angle, dsintance, repeat period of target, to follow the fast moving target, as well as to adapt the system to different flank three sub-array types without the limitation of installation place.

本文的目的在于研究并设计数字式鱼雷声纳脉冲侦察系统，解决传统声纳中存在的一些弊端，实现对鱼雷脉冲信号的实时检测，以及对信号的种类，中心频率，目标的方位，距离信息，重复周期的估计，对快速运动目标的跟踪测距，使系统不受安装场合的限制，适用于不同的舷侧三元子阵。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐