查询词典 hadamard matrix

Linear time-invariant state space symmetric system, model reduction, stability, nondegenerate matrix, gradient flow, optimization

湖南第一师范学校；香港理工大学应用数学系长沙410002；铜罗湾；香港重庆师范大学数学与计算机科学系；重庆400047线对称性时不变系统；梯度流；稳定性；优化

Based on mathematical analysis, elastic geostress field is a symmetric second-order tensor, which can be expressed as symmetric matrix and studied by its eigenvalue and eigenvector.

根据对二阶张量的数学分析，通过求取二阶张量的特征值与特征向量，导出了对称张量在空间几何学中对应的二次曲面。

Second-order field and circuit coupled calculation formula and software are developed where the symmetrization of coefficient matrix is realized.

包括， a。将叠层元技术引入到瞬变电磁场的分析中，并提出了二阶叠层元场路耦合仿真计算格式及软件，在该格式中实现了系数矩阵的对称化。

For convenience of finite element discretization and preserving symmetry of the stiffness matrix, approximation and symmetrization of the continuum equilibrium equations were conducted.

为了便于进行有限元离散化并保持总刚度矩阵的对称性对连续介质平衡方程进行了简化和对称化处理。

In these two models,it issuggested that the method of the stiffness matrix symmetrize for the state of sliding contact in orderto making use of FEM's resolver,resolving the large problems,lowering computer memory spaceand increasing efficiency.

在上述两种接触单元模型中，为了利用FEM软件包的求解器，为了解决大型问题，降低计算机内存占有量，提高机器效率，对于滑动接触状态提出了一种使刚度矩阵对称化的方法。

An engineering approximately design method-equivlent circuit isalso introduced by equilent circuit of waveguide ET-junction and principle of symmetry and of multiplication of matrix.

本文同时依据对称性原理、ET接头的等效电路及传递矩阵的乘积原理建立了波导谐波滤波器的近似工程设计方法——等效电路法，指出等效电路法虽然精度有限、但计算时间很快，可以进行基、谐波全频段分析。

And these timepieces would work in synchronicity with the pyramids and the matrix.

而这些时钟与金字塔和矩阵同步运转。

The elastic properties of syntactic foam s with coated hollow spherical inclusions have been studied by means of Mori and Tanaka's concept of average stress in the matrix and Eshelby's equivalent inclusion theories.

利用Mori＿Tanaka平均应力的概念和Eshelby等效夹杂的原理，研究了含涂层空心球复合泡沫塑料的弹性性质，从理论上导出了这类复合材料的有效模量预测公式·此外，基于这些理论公式，讨论了涂层厚度和泊松比变化对复合泡沫塑料有效模量性质的影响

In the mid-1980s Hoyt Archery introduced the latest in a series of materials innovations, a take-apart bow with a core made of syntactic foam a material composed of tiny glass beads embedded in a rigid foam matrix and wrapped in layers of carbon fibers and fiberglass.

但之后箭弓的材料和制作工艺发生了深刻的改变，HOYT ARCHERY公司引进了最近技术进行材料革新，制成了一种新型"拆分式"箭弓。这种箭弓的内芯是用合成泡沫材料做成的，外层裹以数层碳纤维和玻璃纤维。

Secondly, the author has set up the Factor Set, Factor Weight Set, Evaluation Set and Evaluation Matrix based on the Fuzzy Mathematics, therefore the quantification of expert's experiences is solved. Following the example of product design procedure consisting of designing, collating and checking, the Two-stage Fuzzy Synthetic Evaluation has been established in order to supply the evaluating method of design quality for drawing die-face. After two times of eligible analysis above, the synthetic optimizing design of geometry, material and process can be done with simulation.

以模糊数学为基础，通过确定影响覆盖件拉延模型面设计的因素集、因素权重集、备择集和评判矩阵，解决了专家设计经验知识的量化问题，并建立二级模糊综合评判方法，据此设计、校对、审核等技术人员可以共同对拉延模型面设计质量进行优劣评判和修改；在前面二次分析合格的基础上，利用有限元仿真技术进行几何、材料、工艺多因素综合的优化设计。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。