查询词典 triangular factorization

Among thses matrices, bidiagonal matrix and approximately lower triangular array matrix have determinate construction and can provide linear encoding algorithm, and both subscript matrices, masking matrix and permutation matrix need to be redesigned.

其中双对角线矩阵和近似下三角阵列矩阵是确定结构的，具有高速线性编码的功能；而两种下标矩阵、模板矩阵和置换矩阵均具有类随机结构特征，可以根据需要进行再设计。

Both LDPC codes and OFDM technology are studied in this paper. The working and the results obtained are summarized as follow:1. The definition of LDPC codes and its coding/decoding ideas are systematically summarized, a general algorithm of changing any parity-check matrix to lower triangular form, which is suitable for quick encoding, is given out, along with a girth checking algorithm. Absolutely random LDPC codes construction is improved, a new half random construction of LDPC codes with linear time coding and no 4-cycles is brought out.

系统地阐述了低密度校验码的定义及编译码原理，提出了一种将任何校验矩阵变换成适于快速编码的近似下三角形式的通用算法及一种围长检测算法，对完全随机的校验矩阵构造法进行了改进，提出了一类消除4环且可近似线性编码的校验矩阵半随机构造法，仿真表明，在高编码效率情况下，改进后的半随机构造法，其性能稍优于完全随机构造法，并可以线性时间编码，因此更适合实际应用。

This dissertation mainly investigated two frameworks of H-matrix, such as SPB framework consisting of integer Subscript matrix, Permutation matrix and Bidiagonal matrix and MSPT framework consisting of Masking matrix, sparse Subscript matrix, Permutation matrix and approximately lower Triangular array matrix.

本文主要研究了两种H矩阵的类随机框架结构模型，一是SPB框架，由整数下标矩阵、置换矩阵、双对角线矩阵构成；二是MSPT框架，由稀疏下标矩阵、模板矩阵、置换矩阵和近似下三角阵列矩阵构成。

A triangular topsail with its foot along the gaff and its luff on the topmast .

根部在船的斜桁并且其转舵在上部的三角形的上桅帆。

Any of several sea birds of the genera Fratercula and Lunda of northern regions, characteristically having black and white plumage and a vertically flattened, triangular bill that is brightly colored during breeding season.

海雀一种海鹦属和花魁鸟属海鸟，有黑白相间的羽毛以及在繁殖期色彩鲜艳的垂直扁平的三角形嘴

Based on the assumed natural strain theory,this paper has studied a novel macro triangular partition shell element .

针对剪切闭锁效应，本文研究了一种基于假设自然应变方法的宏观三角形分区平板壳单元。

A quadrilateral or triangular sail set from the after part of the mainmast on a fore - and - aft rigged vessel.

这艘三桅帆船的前桅和主桅上都有相同的斜桅桁下帆和顶帆。

A quadrilateral or triangular sail set from the after part of the mainmast on a fore-and-aft rigged vessel.

帆桁吊在桅杆上一头渐细的长柱，用来支撑和展开横帆、梯形帆或三角帆的顶端

Morever, we give the Jacobason radical of Γ and an application of the triangular matrix algebra.

此外，我们还刻划了Γ的Jacobson根，并且给出了三角矩阵代数的一个应用。

In section one, We characterize when matrix ring, upper triangular matrix ring and trivial extension are simple J-injective rings.

在文章的第一部分我们给出了全矩阵环、上三角矩阵环和平凡扩张是单J—内射环的刻划。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样