By adding weight define with nominal and string attributes and adding range restriction of attribute ' s value , wmdc extended applicability of mdc ( minimum distance classifier ) using normalized euclidian distance and improved its classification accuracy 该分类器通过对标称型和字符串型属性的距离的加权定义,以及增加属性值的范围约束,扩大了最小标准化欧式距离分类器的适用范围,同时提高了其分类准确率。
In the course of classifiers design , this paper recognizes human face with a minimum distance classifier . the similitude of two face image is calculated out by means of distance formulate , and proper threshold is selected to judge whether the two face images belong to one person 在分类器设计过程中,采用最小距离分类器的分类方法进行判断识别,利用距离公式度量两幅人脸图像的相似程度,并选取合适的阈值进行判断识别。
( 5 ) the author researches the relationship between the deep foundation ' s shape , area and depth and the deep excavation dewatering . the formula , which calculates the minimum distance between foundation ' s bottom panel and the confined water layer ' s top panel , was put forward (五)研究了基坑形状、面积、深度与深基坑降水相关性,给出了计算基坑底板至承压含水层顶板间的最小距离公式,分析了针对不同基坑应采用的降水方法。
Through a performance analysis and simulation on generated methods , maximum minimum distance , undetected error probabilities , code weight distribution , good extended shortened codes are determined and general rule is concluded . furtherly , the paper generates nonlinear extended shortened codes 通过对扩展缩短crc码的构造方法、最小距离、不可检错误概率、码重分布等进行理论分析和仿真,得到了扩展缩短crc码的好码,并综合出普遍规律。
The relationship between separation and the set of minimum distance message pairs is discovered , which leads to a theorem of sufficient and necessary condition of unequal protection . based on the definition of separation of code symbols , the large weight error patterns correction criteria of a given code is derived 其次证明了非均匀保护码的分离度和最小距离消息对集合之间的关系,进而证明了非均匀保护码存在的充分必要条件,该条件可以作为判别一个码是否均匀保护的判据。
Based on tanner graph , the representation and construction of ldpc codes are addressed , and the two decoding algorithm for ldpc codes , i . e , bit - flipping algorithm and sum - product algorithm , are discussed . from two aspects - minimum distance and the failure of independence assumption , the impacts of cycles to the performance of ldpc codes are analyzed . 2 基于tanner图模型,详细介绍了ldpc码的表示和构造;介绍了ldpc码的硬判决译码(比特翻转算法)和软判决迭代译码(和积算法) ;从最小距离和独立性假设失效两个方面分析了环的存在对ldpc码译码性能的影响; 2
This paper made a careful study on a class of quasi - regular ldpc codes which could encode in linear time only making use of their parity matrix such as - rotation ldpc codes . two factors of the minimum distance and girth length were discussed to improve the performance of these ldpc codes 本文着重研究以旋转ldpc码为代表的准规则结构的ldpc码的构造和编码方法,可以直接利用校验矩阵实现快速线性编码,并从码距和围长两个方面,对这类ldpc码字性能进行分析和优化。
Under the precondition of compliance with the provisions of from article 23 through article 27 , the minimum distance between low - rise residential buildings arranged in a south - north orientation and in a parallel fashion shall be 6 meters , the shortest distance between a low - rise residential building and a multistory residential building on its north side shall be 8 meters , and the shortest distance between a multistory or low - rise residential building and a high - rise residential building on its north side shall be 13 meters 在符合第二十三条至第二十七条规定的前提下,南北向平行布置的低层居住建筑之间的最小间距为6米,低层居住建筑与其北侧多层居住建筑的最小间距为8米,多、低层居住建筑与其北侧高层居住建筑的最小间距为13米。