查询词典 triangular numbers

The main contents are as follows:(1) Derive recursive Householder transformation formula for transforming the original rectangular matrix column by column into upper triangular matrix, solve the problem of fast upper triangularization of columnvariable matrix.

主要开展的工作有：（1）、导出长方矩阵逐列上三角化的递推Householder变换公式，解决了可变列矩阵的快速上三角化问题。

The triangular shape distributions would cause two-peaked energy distribution near the threshold energy, which must affect the group transfer matrix. The rectangular shape make the too large, that may lead to a negative neutron KERMA (kinetic energy release in materials) factor.

这些简单的近似描述，将导致产生散射矩阵的"双峰"现象，或使平均次级中子能量过大而产生负KERMA(kinetic energy release in materials)因子。

is that the best registration technique requires using EHD measure as similarity measure, selecting regular or triangular control points according to practical situation, applying the new one-to-one stretch mapping method, utilizing the information of subtraction histogram for gray level registration.

包括选取EHD准则作为相似性准则，依实际情况选择规则控制点和三角网格控制点，提出一对一映射拉伸策略和基于减影直方图特性的灰度矫正方法。

On the basis of investigating the sound field of a plane piston transducer and the relations between sound field and radiation force, by settling four plane piston transducers driven at the same frequency at each corner of a regular triangular pyramid with their sound-beam axes crossing at the center of the pyramid, this technique uses ultrasonic wave synthetic theory to acquire a three-dimensional ultrasonic standing wave field. The micro-component can be captured, transported, released in the range of space by adjusting the phase of the transducers.

在研究单个圆形平面活塞换能器声场分布以及声场和辐射力关系的基础上，将以相同频率驱动的4个平面活塞换能器呈正四面体放置，利用声波合成原理获得三维超声驻波场，通过调整各个换能器发射信号相位之间的关系实现对微构件在空间范围内的俘获、移动、释放等操纵。

In chapter 3,we discuss the conversion from triangular Béziersurfaces to rectangular Bézier surfaces by reparametrization.

第三章应用Bézier曲线、曲面的算子表示技巧，研究了从Bézier三角片到Bézier矩形片的转化关系。

The conversion problem between rational S-patches and rational triangular Bézier patches was investigated with the reparametrization method.

采用重新参数化方法研究有理S曲面片与有理三角Bézier曲面片之间的相互转换问题。

Leaves ovate-oblong, rhomboid, to ovate-triangular, less than 4 cm.

卵状长圆形，斜方形，到卵形三角形的叶，不到4 厘米 76

Particles may be seen to be of different sizes and shapes (oval, triangular, oblong, rhomboid, etc.).

当还原过程中结晶和聚集速度不能控制时，形状不规则的颗粒将会产生（见图4）。

There are also rice paper wrappers which come in either circular or triangular shape.

还有宣纸包装，它们在任何圆形或三角形。

Matrix's triangular decomposition is the simplest and most basic kind of decomposition in matrix decomposition .

矩阵的三角分解是矩阵分解中最简单、最基础的一种。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。