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
To study the problem of knowledge translation in fuzzy approximation spaces, the concept of rough communication of crisp set in fuzzy approximation spaces is proposed. In a rough communication of crisp set in fuzzy ap...To study the problem of knowledge translation in fuzzy approximation spaces, the concept of rough communication of crisp set in fuzzy approximation spaces is proposed. In a rough communication of crisp set in fuzzy approximation spaces, the problem of uncertainty exists, for each agent has a different language and cannot provide precise communication to each other. By means of some concepts, such as CF rough communication cut, which is a bridge between fuzzy concept and crisp concept, cut analysis of CF rough communication is made, and the relation theorem between CF rough communication and rough communication of crisp concept is obtained. Finally, in order to give an intuitive analysis of the relation between CF rough communication and rough communication of crisp concept, an example is given.展开更多
为了使“区间”形式加以表述的不确定信息的提取具有侧重性,需提取出对象(属性)集对应的属性(对象)区间集。本文在模糊形式背景中,通过引入2个阈值,将单边区间集与经典半概念结合,提取出属性(对象)集对应的对象(属性)区间集,从而提出区...为了使“区间”形式加以表述的不确定信息的提取具有侧重性,需提取出对象(属性)集对应的属性(对象)区间集。本文在模糊形式背景中,通过引入2个阈值,将单边区间集与经典半概念结合,提取出属性(对象)集对应的对象(属性)区间集,从而提出区间集外延–集合内涵(集合外延–区间集内涵)(interval set extent-set intent(set extent-interval set intent),ISE-SI(SE-ISI))型单边区间集模糊半概念。全体ISE-SI(SE-ISI)型单边区间集模糊半概念构成格,并给出基于格搜寻全体ISE-SI(SE-ISI)型单边区间集模糊半概念的算法。通过与已有成果对比,显示出这2种知识表示形式的多方优势。本文所得结果在知识表示及提取方法上具有适用范围广、实际应用强等优点。展开更多
为了快速适应非平稳环境中工业数据流的分布变化,需要在非结构化和噪声干扰的数据中准确、实时的完成概念漂移的检测.本文提出了一种基于多元区域集划分的工业数据流概念漂移检测算法(Concept Drift detection-Multivariate region set ...为了快速适应非平稳环境中工业数据流的分布变化,需要在非结构化和噪声干扰的数据中准确、实时的完成概念漂移的检测.本文提出了一种基于多元区域集划分的工业数据流概念漂移检测算法(Concept Drift detection-Multivariate region set Partition,CDMP).首先基于实例模糊密度进行多元区域集划分,根据划分的若干模糊分区集合,识别概念漂移发生的区域.概念漂移的持续发生会显著降低基于多元区域集构建的模型的分类性能,CDMP通过构建多元历史模型池来保留具有多样性的历史模型,以降低模型调整或再训练造成的性能损耗,同时保证概念漂移检测中准确性.CDMP在不同数据集上进行了性能测试.实验结果表明,CDMP实现了对历史模型多样性的保留和重用,能够在不同噪声水平的工业物联网环境中实现对重现型、突发型等多类型概念漂移的准确检测.展开更多
In this paper, a kind of multi-level formal concept is introduced. Based on the proposed multi-level formal concept,we present a pair of rough fuzzy set approximations within fuzzy formal contexts.By the proposed roug...In this paper, a kind of multi-level formal concept is introduced. Based on the proposed multi-level formal concept,we present a pair of rough fuzzy set approximations within fuzzy formal contexts.By the proposed rough fuzzy set approximations,we can approximate a fuzzy set according to different precision level.We discuss the properties of the proposed approximation operators in detail.展开更多
Many real-life data sets are incomplete,or in different words,are affected by missing attribute values.Three interpretations of missing attribute values are discussed in the paper:lost values(erased values),attribute-...Many real-life data sets are incomplete,or in different words,are affected by missing attribute values.Three interpretations of missing attribute values are discussed in the paper:lost values(erased values),attribute-concept values(such a value may be replaced by any value from the attribute domain restricted to the concept),and "do not care" conditions(a missing attribute value may be replaced by any value from the attribute domain).For incomplete data sets three definitions of lower and upper approximations are discussed.Experiments were conducted on six typical data sets with missing attribute values,using three different interpretations of missing attribute values and the same definition of concept lower and upper approximations.The conclusion is that the best approach to missing attribute values is the lost value type.展开更多
目的:探究目标设置理念下康复训练联合双心医学照护模式在心脏瓣膜替换术后患者中的应用效果。方法:选取2021年5月—2022年5月福建医科大学附属泉州第一医院收治的83例心脏瓣膜替换术后患者为研究对象,按照简单随机数表法分为对照组(n=...目的:探究目标设置理念下康复训练联合双心医学照护模式在心脏瓣膜替换术后患者中的应用效果。方法:选取2021年5月—2022年5月福建医科大学附属泉州第一医院收治的83例心脏瓣膜替换术后患者为研究对象,按照简单随机数表法分为对照组(n=41)和观察组(n=42),对照组采用目标设置理念下康复训练,观察组采用目标设置理念下康复训练联合双心医学照护模式,两组均干预2周。比较两组心功能、心理状态、生活质量评分及术后并发症发生情况。结果:干预2周后,两组射血分数(ejection fraction,EF)、心脏指数(cardiac index,CI)、心输出量(cardiac output,CO)水平、简明健康调查问卷(MOS item short form health survey,SF-36)评分均高于干预前,且观察组高于对照组,差异有统计学意义(P<0.05);两组症状自评量表(symptom checklist-90,SCL-90)评分均低于干预前,且观察组低于对照组,差异有统计学意义(P<0.05)。观察组术后并发症发生率低于对照组,差异有统计学意义(P<0.05)。结论:目标设置理念下康复训练联合双心医学照护模式应用于心脏瓣膜替换术后患者,能有效改善心功能及心理状态,并提高其生活质量、降低术后并发症发生风险,对预后康复有利。展开更多
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.
基金supported by the Natural Science Foundation of Shandong Province (Y2006A12)the Scientific Research Development Project of Shandong Provincial Education Department (J06P01)+2 种基金the Science and Technology Foundation of Universityof Jinan (XKY0808 XKY0703)the Doctoral Foundation of University of Jinan (B0633).
文摘To study the problem of knowledge translation in fuzzy approximation spaces, the concept of rough communication of crisp set in fuzzy approximation spaces is proposed. In a rough communication of crisp set in fuzzy approximation spaces, the problem of uncertainty exists, for each agent has a different language and cannot provide precise communication to each other. By means of some concepts, such as CF rough communication cut, which is a bridge between fuzzy concept and crisp concept, cut analysis of CF rough communication is made, and the relation theorem between CF rough communication and rough communication of crisp concept is obtained. Finally, in order to give an intuitive analysis of the relation between CF rough communication and rough communication of crisp concept, an example is given.
文摘为了使“区间”形式加以表述的不确定信息的提取具有侧重性,需提取出对象(属性)集对应的属性(对象)区间集。本文在模糊形式背景中,通过引入2个阈值,将单边区间集与经典半概念结合,提取出属性(对象)集对应的对象(属性)区间集,从而提出区间集外延–集合内涵(集合外延–区间集内涵)(interval set extent-set intent(set extent-interval set intent),ISE-SI(SE-ISI))型单边区间集模糊半概念。全体ISE-SI(SE-ISI)型单边区间集模糊半概念构成格,并给出基于格搜寻全体ISE-SI(SE-ISI)型单边区间集模糊半概念的算法。通过与已有成果对比,显示出这2种知识表示形式的多方优势。本文所得结果在知识表示及提取方法上具有适用范围广、实际应用强等优点。
文摘为了快速适应非平稳环境中工业数据流的分布变化,需要在非结构化和噪声干扰的数据中准确、实时的完成概念漂移的检测.本文提出了一种基于多元区域集划分的工业数据流概念漂移检测算法(Concept Drift detection-Multivariate region set Partition,CDMP).首先基于实例模糊密度进行多元区域集划分,根据划分的若干模糊分区集合,识别概念漂移发生的区域.概念漂移的持续发生会显著降低基于多元区域集构建的模型的分类性能,CDMP通过构建多元历史模型池来保留具有多样性的历史模型,以降低模型调整或再训练造成的性能损耗,同时保证概念漂移检测中准确性.CDMP在不同数据集上进行了性能测试.实验结果表明,CDMP实现了对历史模型多样性的保留和重用,能够在不同噪声水平的工业物联网环境中实现对重现型、突发型等多类型概念漂移的准确检测.
文摘In this paper, a kind of multi-level formal concept is introduced. Based on the proposed multi-level formal concept,we present a pair of rough fuzzy set approximations within fuzzy formal contexts.By the proposed rough fuzzy set approximations,we can approximate a fuzzy set according to different precision level.We discuss the properties of the proposed approximation operators in detail.
文摘Many real-life data sets are incomplete,or in different words,are affected by missing attribute values.Three interpretations of missing attribute values are discussed in the paper:lost values(erased values),attribute-concept values(such a value may be replaced by any value from the attribute domain restricted to the concept),and "do not care" conditions(a missing attribute value may be replaced by any value from the attribute domain).For incomplete data sets three definitions of lower and upper approximations are discussed.Experiments were conducted on six typical data sets with missing attribute values,using three different interpretations of missing attribute values and the same definition of concept lower and upper approximations.The conclusion is that the best approach to missing attribute values is the lost value type.
文摘目的:探究目标设置理念下康复训练联合双心医学照护模式在心脏瓣膜替换术后患者中的应用效果。方法:选取2021年5月—2022年5月福建医科大学附属泉州第一医院收治的83例心脏瓣膜替换术后患者为研究对象,按照简单随机数表法分为对照组(n=41)和观察组(n=42),对照组采用目标设置理念下康复训练,观察组采用目标设置理念下康复训练联合双心医学照护模式,两组均干预2周。比较两组心功能、心理状态、生活质量评分及术后并发症发生情况。结果:干预2周后,两组射血分数(ejection fraction,EF)、心脏指数(cardiac index,CI)、心输出量(cardiac output,CO)水平、简明健康调查问卷(MOS item short form health survey,SF-36)评分均高于干预前,且观察组高于对照组,差异有统计学意义(P<0.05);两组症状自评量表(symptom checklist-90,SCL-90)评分均低于干预前,且观察组低于对照组,差异有统计学意义(P<0.05)。观察组术后并发症发生率低于对照组,差异有统计学意义(P<0.05)。结论:目标设置理念下康复训练联合双心医学照护模式应用于心脏瓣膜替换术后患者,能有效改善心功能及心理状态,并提高其生活质量、降低术后并发症发生风险,对预后康复有利。
基金Supported by the National Natural Science Foundation of China under Grant Nos.6057307470471003(国家自然科学基金)+1 种基金the Natural Science Foundation of Shanxi Province of China under Grant No.2007011040(山西省自然科学基金)the Foundation of Doctoral Program Research of the Ministry of Education of China under Grant No.20050108004(高等学校博士学科点专项科研基金)