集合关系

A binary relation from a set A to A is said to be a binary relation on A.

从集合A到A的二元关系，称为A上的二元关系。

A binary relation on a set that is reflexive and symmetric is called a compatible relation.

一个集合上的二元关系，如果它是自反的也是对称的，可称它为相容关系。

That results in a new class of answer set semantics for ordered logic program including several kinds of already existed semantics. The diverse answer set semantics are compared in detail and a Hasse diagram with respect to set inclusive relations for the semantics is given.

通过证明和举例详细比较了各种回答集语义之间的强弱关系，给出了它们在集合包含关系意义下的哈斯图，证明了各种回答集语义在包含关系下形成格的结构。

Traverse the map : The map is set by the vertex and the relationship between peak set consisting of a d...

图的遍历：图是由顶点集合及顶点间的关系集合组成的一种数据结构：Graph＝。

Based on English definition of the six properties which a relation R defined on a set A and utilizing the logical characteristic of implications, two aspects of ordered-pair and the matrix MR are considered, and the properties of the R is analyzed one by one. A few useful conclusions are summarized as determining the properey of the R. The following collections are also analyzed between reflexive and irreflexive, symmetric and antisymmetric, symmetric and asymmetric and among irreflexive, antisymmetric and asymmetric.

根据定义在一个集合A上的关系R的六个性质的英文定义，利用蕴含式的逻辑特点，从有序对和关系R的矩阵M两个角度对每个性质逐一进行分析，得出在判定关系R的性质时可用的结论，并且分析了自反性与非自反性之间、对称性与反对称性之间、对称性与非对称性之间、非自反性和反对称性以及非对称性之间的联系。

Here we clarify that areal-type of a genus is defined by concluding distributions of all species in the genus, therefore specific distribution types are not the same as their generic areal-types except monotypic genera. Similarities of composition of areal-types between compared regional floras do not necessarily represent their floristic similarities because the same generic areal-type can be composed by different genera from different plant families.

根据植物区系学理论，属的分布区是该属内所有物种的分布区的集合，除单种属外，不能直接套用属分布区类型作为该属内各个种的分布区类型；亲缘关系疏远的不同植物属可以有同样的分布区类型，若把不同地区植物区系各地理成分的比例关系的类似性解读成各地区间植物区系的亲缘关系，显然是不适合的。

This article focuses on the structure of CCD,which presents a concept defined by a set of synonyms and a network of concepts based on the hypernymy hierarchy,the basic relationship,with other supplementary relationships.

本文着重描述了CCD的结构：CCD中的&概念&用同义词的集合定义，CCD的主关系———概念之间的继承关系和一些附加关系使得CCD形成一个概念网络，其上的演绎规则是严格形式化了的，可应用于中文的语义分析

In this algorithm, Harris corner detector is used to extract feature points, which gains sub pixel precision for features extraction. Then, a pseudo matching set is obtained by comparing local neighborhoods of features through intensity cross correlation method and these pseudo matches are divided into inliers and outliers using robust RANSAC algorithm.

此算法采用 Harris角检测算子进行特征点提取，使提取的精度达到了亚像素级，然后以特征点邻域灰度互相关法进行特征点匹配得到了初步的伪匹配集合，并运用稳健的RANSAC算法将伪匹配点集合划分为内点和外点，在内点域上运用 L M优化算法精确地估计出了图像间的点变换关系，最后采用颜色插值对交接处进行颜色过渡。

Based on the model of Logistic, Levins and Tilman, the model of exponent, restoration of habitat,habitat overlap has been put forward systematically and probe into the following questions :how do the evolutional characteristic of meta-population in different regions, the relation between the extinction order of animals and the degree of habitat destruction upon by human activities.

本文主要研究了以下问题：1、不同区域集合动物种群的演化特点、动物物种灭绝的顺序与人类活动对栖息地破坏的&度&的关系2、人为增加或恢复部分栖息地，对不同区域集合种群里强弱不同的物种种群的演化、繁衍将产生什么影响？

According to the engage relation of cycloidal gear with the pin wheel in type 2K V transmission,the formulas of relationship between transmission precision and mesh error of the actual profile of gears are established; then a synthesis mesh error is proposed as a quantified concourse of error to judge the transmission error,therefor the machining tolerances relative to transmission precision have quantificational relation,which is the basis for machining high precision 2K V drives with cycloidal gears.

根据 2K—V型传动中摆线轮与针轮的啮合关系，建立了实际齿廓的啮合误差与传动精度关系的计算式，并提出了综合啮合误差这一量化误差集合来评判传动误差，使得加工公差与传动精度有一个定量的关系，从而为研制开发高精度摆线齿 2K V型传动的加工制造提供了依据。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。