围长为 meaning in English
girt
Examples
- In this paper , we are concerned with the generalized primitive exponents of the digraphs with given order and girth 2
本文主要研究围长为2的n阶有向图的指数及相应的指数集。 - ( 3 ) we give an upper bound for lewin index , which is related to generalized primitive exponents of primitive digraph of order n and girth 2 , determine the index set of this class digraph and discuss the extreme cases
( 3 )第4节分析了围长为2的n阶本原有向图的l ( g )的上界及相应的指数集，并讨论了极端情形。 - The main results are : ( 1 ) we give an upper bound for kth generalized primitive exponents of primitive digraphs with order n and girth 2 , and determine the exponent set of this class digraphs in section 2
主要内容有三部分： ( 1 )第2节给出了围长为2的n阶本原有向图的第k个顶点指数( exp _ d ( k ) )的上界及相应的指数集。 - ( 2 ) we give an upper bound for kth generalized primitive exponents of non - primitive digraphs with order n and girth 2 , determine the exponent set of this class digraphs in section 3 , and discuss the extreme cases
( 2 )第3节给出了围长为2的n阶非本原有向图的第k个顶点指数( exp _ d ( k ) )的上界及相应的指数集，讨论了极端情形。 - And some other construction methods based on finite geometry , graph theory and group theory are also depicted . an algebraic construction method for ldpc codes with 8 - girth is proposed based on complete residue system . simulation results show that these codes can achieve better performance than randomly constructed regular ldpc codes over awgn channel
最后，在分析、研究现有构造方法的基础上，基于代数中的完全剩余系，作者提出了一种代数构造方法，使得ldpc码对应因子图上的围长为8 ，并采用计算机对其性能进行了仿真，结果表明该码能够取得比较理想的译码性能。