Attribute reduction of formal decision context mainly uses the relationship between two concept lattices generated by the condition and decision attributes to remove redundant condition attributes.By using decision at...Attribute reduction of formal decision context mainly uses the relationship between two concept lattices generated by the condition and decision attributes to remove redundant condition attributes.By using decision attributes to observe the covering of objects,this study defines two types of consistent sets and reducts in a consistent formal decision context based on neighbourhood systems.Four types of reductions in inconsistent formal decision contexts are also studied.The methods to calculate all types of reductions are formulated by discernibility matrix.Finally,an approach to obtain the decision rules in consistent formal decision context is proposed.展开更多
The research mainly discuss that public speeches should be made and delivered in accordance of speaking situation. By investigating different sample public speeches, it can be found that proper use of"context of ...The research mainly discuss that public speeches should be made and delivered in accordance of speaking situation. By investigating different sample public speeches, it can be found that proper use of"context of situation"plays an important role in making public speeches appropriate both in linguistic scope and in social scope. The research also gives some suggestions on writing of public speeches.展开更多
There is an intimate correlation between rough set theory and formal concept analysis theory, so rough set approximations can be realized by means of formal concept analysis. For any given multiple valued information ...There is an intimate correlation between rough set theory and formal concept analysis theory, so rough set approximations can be realized by means of formal concept analysis. For any given multiple valued information system, the realization of rough set approximation operation has two major steps, firstly convert the information system from multiple valued one to single valued formal context, secondly realize rough set approximation operations aided by concept lattice, which is equivalent to a query operation under some necessary conditions.展开更多
动态网络分析是复杂网络背景下机器学习和人工智能研究的热门方向之一。将形式概念分析方法与动态网络分析方法相结合,对动态网络中的概念及其网络特征值的动态性进行研究具有重要意义。首先,提出了动态网络形式背景,将动态网络数据与...动态网络分析是复杂网络背景下机器学习和人工智能研究的热门方向之一。将形式概念分析方法与动态网络分析方法相结合,对动态网络中的概念及其网络特征值的动态性进行研究具有重要意义。首先,提出了动态网络形式背景,将动态网络数据与形式概念分析统一到一个数据框架下,结合现实中的动态网络数据类型,对其中一类动态网络形式背景进行了分类和构造性分析;其次,提出了动态网络概念及其网络特征值的定义,为后面研究网络概念的动态性奠定了基础;接着,给出了各种网络概念特征值的变化速率的定义,并提出了网络对象概念动态性分析算法和网络属性概念动态性分析算法;最后,利用从Web of Science核心期刊库中提取的数据对所提出的两个算法进行实验,实验表明所提算法能对网络概念及其特征值的动态性进行有效的分析。展开更多
基金This work was supported by the National Natural Science Foundation of China(nos.61573127 and 61502144)the Natural Science Foundation of Hebei Province(no.F2018205196)+1 种基金the Science and Technology Research Program of Higher Education Institutions of Hebei Province(nos.BJ2019014 and QN2017095)the Doctor Natural Science Foundation of Hebei Normal University(no.L2017B19).
文摘Attribute reduction of formal decision context mainly uses the relationship between two concept lattices generated by the condition and decision attributes to remove redundant condition attributes.By using decision attributes to observe the covering of objects,this study defines two types of consistent sets and reducts in a consistent formal decision context based on neighbourhood systems.Four types of reductions in inconsistent formal decision contexts are also studied.The methods to calculate all types of reductions are formulated by discernibility matrix.Finally,an approach to obtain the decision rules in consistent formal decision context is proposed.
文摘The research mainly discuss that public speeches should be made and delivered in accordance of speaking situation. By investigating different sample public speeches, it can be found that proper use of"context of situation"plays an important role in making public speeches appropriate both in linguistic scope and in social scope. The research also gives some suggestions on writing of public speeches.
文摘There is an intimate correlation between rough set theory and formal concept analysis theory, so rough set approximations can be realized by means of formal concept analysis. For any given multiple valued information system, the realization of rough set approximation operation has two major steps, firstly convert the information system from multiple valued one to single valued formal context, secondly realize rough set approximation operations aided by concept lattice, which is equivalent to a query operation under some necessary conditions.
文摘动态网络分析是复杂网络背景下机器学习和人工智能研究的热门方向之一。将形式概念分析方法与动态网络分析方法相结合,对动态网络中的概念及其网络特征值的动态性进行研究具有重要意义。首先,提出了动态网络形式背景,将动态网络数据与形式概念分析统一到一个数据框架下,结合现实中的动态网络数据类型,对其中一类动态网络形式背景进行了分类和构造性分析;其次,提出了动态网络概念及其网络特征值的定义,为后面研究网络概念的动态性奠定了基础;接着,给出了各种网络概念特征值的变化速率的定义,并提出了网络对象概念动态性分析算法和网络属性概念动态性分析算法;最后,利用从Web of Science核心期刊库中提取的数据对所提出的两个算法进行实验,实验表明所提算法能对网络概念及其特征值的动态性进行有效的分析。
