In this paper, as a generalization of the notion of(∈, ∈∨ q)-fuzzy ideals, we introduced the notion of(∈, ∈∨ qδ)-fuzzy ideals and investigated their properties in BCKalgebras. Several equivalent characterizatio...In this paper, as a generalization of the notion of(∈, ∈∨ q)-fuzzy ideals, we introduced the notion of(∈, ∈∨ qδ)-fuzzy ideals and investigated their properties in BCKalgebras. Several equivalent characterizations of(∈, ∈∨ qδ)-fuzzy ideals are obtained and relations between(∈, ∈∨ qδ)-fuzzy ideals and ideals are discussed in BCK-algebras.展开更多
The concept of（∈,∈∨q）-fuzzy subnear-rings（ideals） of a near-ring is introduced and some of its related properties are investigated.In particular,the relationships among ordinary fuzzy subnear-rings（ideals）,（...The concept of（∈,∈∨q）-fuzzy subnear-rings（ideals） of a near-ring is introduced and some of its related properties are investigated.In particular,the relationships among ordinary fuzzy subnear-rings（ideals）,（∈,∈∨ q）-fuzzy subnear-rings（ideals） and（∈,∈∨q）-fuzzy subnear-rings（ideals） of near-rings are described.Finally,some characterization of [μ]t is given by means of（∈,∈∨ q）-fuzzy ideals.展开更多
With a new idea, we redefine generalized fuzzy subnear-rings （ideals） of a near- ring and investigate some of its related properties. Some new characterizations are given. In particular, we introduce the concepts of...With a new idea, we redefine generalized fuzzy subnear-rings （ideals） of a near- ring and investigate some of its related properties. Some new characterizations are given. In particular, we introduce the concepts of strong prime （or semiprime） （∈, ∈∨ q）-fuzzy ideals of near-rings, and discuss the relationship between strong prime （or semiprime） （∈, ∈∨ q）-fuzzy ideals and prime （or semiprime） （∈, ∈∨ q）-fuzzy ideals of near-rings.展开更多
Selection of the crusher required a great deal of design regarding to the mine planning. Selection of suitable primary crusher from all of available primary crushers is a multi-criterion decision making(MCDM) problem....Selection of the crusher required a great deal of design regarding to the mine planning. Selection of suitable primary crusher from all of available primary crushers is a multi-criterion decision making(MCDM) problem. The present work explores the use of technique for order performance by similarity to ideal solution(TOPSIS) with fuzzy set theory to select best primary crusher for Golegohar Iron Mine in Iran. Gyratory, double toggle jaw, single toggle jaw, high speed roll crusher, low speed sizer, impact crusher, hammer mill and feeder breaker crushers have been considered as alternatives. Also, the capacity, feed size, product size, rock compressive strength, abrasion index and application of primary crusher for mobile plants were considered as criteria for solution of this MCDM problem. To determine the order of the alternatives, closeness coefficient is defined by calculating the distances to the fuzzy positive ideal solution(FPIS) and fuzzy negative ideal solution(FNIS). Results of our work based on fuzzy TOPSIS method show that the gyratory is the best primary crusher for the studied mine.展开更多
能源安全作为国家安全体系的重要组成部分,对于我国社会主义现代化强国建设至关重要。文中以国际能源署对能源安全的定义为基础,从生产保障能力、进口多元程度、经济可承受性3个维度构建能源安全评价指标体系。在此基础上,提出运用层次...能源安全作为国家安全体系的重要组成部分,对于我国社会主义现代化强国建设至关重要。文中以国际能源署对能源安全的定义为基础,从生产保障能力、进口多元程度、经济可承受性3个维度构建能源安全评价指标体系。在此基础上,提出运用层次分析法(analytic hierarchy process,AHP)-熵权法-改进逼近理想解排序法(technique for order preference by similarity to an ideal solution,TOPSIS)的组合评价方法,得到不受评价范围、评价期影响且相对固定的能源安全指数。通过综合评价中美两国2015年—2021年能源安全水平,得出中美两国能源安全指数变化趋势。结果表明,我国在能源供应保障能力、用能成本等方面具有较大的提升空间,仍须进一步提高我国能源生产能力,加快构建新型能源体系,提升能源自给率,扩大能源国际合作规模,降低用能成本,保障能源安全。展开更多
背景血脂异常、原发性高血压、糖尿病、肥胖、吸烟、不健康饮食及身体活动不足等是动脉粥样硬化性心血管疾病(ASCVD)可改变的危险因素,并用于进行10年风险评估。而上述4项行为因素以及3项生理和生化指标维持理想状态可明显降低人群ASCV...背景血脂异常、原发性高血压、糖尿病、肥胖、吸烟、不健康饮食及身体活动不足等是动脉粥样硬化性心血管疾病(ASCVD)可改变的危险因素,并用于进行10年风险评估。而上述4项行为因素以及3项生理和生化指标维持理想状态可明显降低人群ASCVD的发生。目的分析门诊就诊原发性高血压患者ASCVD的危险因素水平、危险分层以及理想心血管健康行为和因素,综合反应ASCVD发病风险。方法选择2016年6月至2017年6月在首都医科大学附属北京安贞医院就诊的>35岁的原发性高血压患者3451例为研究对象,采用面对面询问和现场测量、血液生化检查收集患者的基本信息,采用武阳丰教授建立的国人10年ASCVD风险评估预测模型(以下简称预测方法)及《中国心血管病预防指南》提供的方法(以下简称指南方法)对ASCVD发病风险进行评估及危险分层,理想的心血管健康定义采用美国心脏协会(AHA)的建议(包括7项理想的健康因素和行为)。计算Kappa值,评估两种方法对ASCVD危险分层结果的一致性。结果≥55岁的原发性高血压患者,两种工具判断的ASCVD不同危险人群的构成比较,差异有统计学意义(χ^(2)=10.608,P=0.005),预测模型方法判断ASCVD为高危的比例高于指南方法初评的结果(χ^(2)=4.219,P=0.04)。<55岁的原发性高血压患者,两种工具判断的ASCVD不同危险人群的构成比较,差异有统计学意义(χ^(2)=534.350,P<0.001);预测模型方法评估以低危为主(76.3%),高危的比例仅为6.6%,指南方法初评高危比例达到29.5%。对中危患者进行余生风险评估,66例患者(13.0%)调整为高危,最终高危患者比例达到34.5%。预测模型方法判断为低危、中危和高危的患者,指南方法同样评估为低危、中危和高危的比例分别为51.9%、44.5%和56.0%,一致率为50.8%,经内部一致性检验,Kappa值为0.261(u=17.010,P<0.001)。仅2.4%患者具有5项健康行为和因素,70.4%具有2~3项健康行为和因素。女性原发性高血压患者不吸烟/戒烟比例、理想体质指数(BMI)比例、空腹血糖(FPG)<5.6 mmol/L、血压<120/80 mm Hg比例高于男性,总胆固醇(TC)<5.2 mmol/L比例低于男性;不同性别原发性高血压患者理想身体活动比例、心血管健康指标数目比较,差异均有统计学意义(P<0.05);女性≥1项、≥2项、≥3项、≥4项心血管健康指标的比例均高于男性,差异有统计学意义(χ^(2)=33.980,P<0.001;χ^(2)=34.946,P<0.001;χ^(2)=107.419,P<0.001;χ^(2)=37.488,P<0.001)。结论两种评估方法的内部一致性较差;对于<55岁原发性高血压患者,指南判定高危的比例也超过1/3,和≥55岁高危比例相近,有高估此人群ASCVD危险的可能;5项心血管健康行为和因素,约70%患者具有2~3项健康行为和因素。加强原发性高血压患者可干预危险因素的控制,改善心血管健康可能是降低ASCVD危险的重要策略。展开更多
把由 G. Thierrin和 A. Spoletini- Cherubini等人定义并研究的强可逆半群以及由 S.Bogdanovic研究的半准素半群分别推广为强可逆序半群和半准素序半群 .分别给出了半准素序半群和强可逆序半群类中的半准素序半群的刻划 ,还给出了其所...把由 G. Thierrin和 A. Spoletini- Cherubini等人定义并研究的强可逆半群以及由 S.Bogdanovic研究的半准素半群分别推广为强可逆序半群和半准素序半群 .分别给出了半准素序半群和强可逆序半群类中的半准素序半群的刻划 ,还给出了其所有理想是素理想的强可逆序半群的刻划 .展开更多
基金Supported by the National Science Foundation of China（60774073）
文摘In this paper, as a generalization of the notion of(∈, ∈∨ q)-fuzzy ideals, we introduced the notion of(∈, ∈∨ qδ)-fuzzy ideals and investigated their properties in BCKalgebras. Several equivalent characterizations of(∈, ∈∨ qδ)-fuzzy ideals are obtained and relations between(∈, ∈∨ qδ)-fuzzy ideals and ideals are discussed in BCK-algebras.
基金Supported by the National Natural Science Foundation of China (60875034)the Natural Science Foundationof Education Committee of Hubei Province (D20092901+3 种基金Q20092907D20082903B200529001)the NaturalScience Foundation of Hubei Province (2008CDB341)
文摘The concept of（∈,∈∨q）-fuzzy subnear-rings（ideals） of a near-ring is introduced and some of its related properties are investigated.In particular,the relationships among ordinary fuzzy subnear-rings（ideals）,（∈,∈∨ q）-fuzzy subnear-rings（ideals） and（∈,∈∨q）-fuzzy subnear-rings（ideals） of near-rings are described.Finally,some characterization of [μ]t is given by means of（∈,∈∨ q）-fuzzy ideals.
基金Supported by the National Natural Science Foundation of China(60875034)the Natural Science Foundation of Education Committee of Hubei Province(D20092901),the Natural Science Foundation of Hubei Province(2009CDB340)
文摘With a new idea, we redefine generalized fuzzy subnear-rings （ideals） of a near- ring and investigate some of its related properties. Some new characterizations are given. In particular, we introduce the concepts of strong prime （or semiprime） （∈, ∈∨ q）-fuzzy ideals of near-rings, and discuss the relationship between strong prime （or semiprime） （∈, ∈∨ q）-fuzzy ideals and prime （or semiprime） （∈, ∈∨ q）-fuzzy ideals of near-rings.
文摘Selection of the crusher required a great deal of design regarding to the mine planning. Selection of suitable primary crusher from all of available primary crushers is a multi-criterion decision making(MCDM) problem. The present work explores the use of technique for order performance by similarity to ideal solution(TOPSIS) with fuzzy set theory to select best primary crusher for Golegohar Iron Mine in Iran. Gyratory, double toggle jaw, single toggle jaw, high speed roll crusher, low speed sizer, impact crusher, hammer mill and feeder breaker crushers have been considered as alternatives. Also, the capacity, feed size, product size, rock compressive strength, abrasion index and application of primary crusher for mobile plants were considered as criteria for solution of this MCDM problem. To determine the order of the alternatives, closeness coefficient is defined by calculating the distances to the fuzzy positive ideal solution(FPIS) and fuzzy negative ideal solution(FNIS). Results of our work based on fuzzy TOPSIS method show that the gyratory is the best primary crusher for the studied mine.
文摘能源安全作为国家安全体系的重要组成部分,对于我国社会主义现代化强国建设至关重要。文中以国际能源署对能源安全的定义为基础,从生产保障能力、进口多元程度、经济可承受性3个维度构建能源安全评价指标体系。在此基础上,提出运用层次分析法(analytic hierarchy process,AHP)-熵权法-改进逼近理想解排序法(technique for order preference by similarity to an ideal solution,TOPSIS)的组合评价方法,得到不受评价范围、评价期影响且相对固定的能源安全指数。通过综合评价中美两国2015年—2021年能源安全水平,得出中美两国能源安全指数变化趋势。结果表明,我国在能源供应保障能力、用能成本等方面具有较大的提升空间,仍须进一步提高我国能源生产能力,加快构建新型能源体系,提升能源自给率,扩大能源国际合作规模,降低用能成本,保障能源安全。
文摘背景血脂异常、原发性高血压、糖尿病、肥胖、吸烟、不健康饮食及身体活动不足等是动脉粥样硬化性心血管疾病(ASCVD)可改变的危险因素,并用于进行10年风险评估。而上述4项行为因素以及3项生理和生化指标维持理想状态可明显降低人群ASCVD的发生。目的分析门诊就诊原发性高血压患者ASCVD的危险因素水平、危险分层以及理想心血管健康行为和因素,综合反应ASCVD发病风险。方法选择2016年6月至2017年6月在首都医科大学附属北京安贞医院就诊的>35岁的原发性高血压患者3451例为研究对象,采用面对面询问和现场测量、血液生化检查收集患者的基本信息,采用武阳丰教授建立的国人10年ASCVD风险评估预测模型(以下简称预测方法)及《中国心血管病预防指南》提供的方法(以下简称指南方法)对ASCVD发病风险进行评估及危险分层,理想的心血管健康定义采用美国心脏协会(AHA)的建议(包括7项理想的健康因素和行为)。计算Kappa值,评估两种方法对ASCVD危险分层结果的一致性。结果≥55岁的原发性高血压患者,两种工具判断的ASCVD不同危险人群的构成比较,差异有统计学意义(χ^(2)=10.608,P=0.005),预测模型方法判断ASCVD为高危的比例高于指南方法初评的结果(χ^(2)=4.219,P=0.04)。<55岁的原发性高血压患者,两种工具判断的ASCVD不同危险人群的构成比较,差异有统计学意义(χ^(2)=534.350,P<0.001);预测模型方法评估以低危为主(76.3%),高危的比例仅为6.6%,指南方法初评高危比例达到29.5%。对中危患者进行余生风险评估,66例患者(13.0%)调整为高危,最终高危患者比例达到34.5%。预测模型方法判断为低危、中危和高危的患者,指南方法同样评估为低危、中危和高危的比例分别为51.9%、44.5%和56.0%,一致率为50.8%,经内部一致性检验,Kappa值为0.261(u=17.010,P<0.001)。仅2.4%患者具有5项健康行为和因素,70.4%具有2~3项健康行为和因素。女性原发性高血压患者不吸烟/戒烟比例、理想体质指数(BMI)比例、空腹血糖(FPG)<5.6 mmol/L、血压<120/80 mm Hg比例高于男性,总胆固醇(TC)<5.2 mmol/L比例低于男性;不同性别原发性高血压患者理想身体活动比例、心血管健康指标数目比较,差异均有统计学意义(P<0.05);女性≥1项、≥2项、≥3项、≥4项心血管健康指标的比例均高于男性,差异有统计学意义(χ^(2)=33.980,P<0.001;χ^(2)=34.946,P<0.001;χ^(2)=107.419,P<0.001;χ^(2)=37.488,P<0.001)。结论两种评估方法的内部一致性较差;对于<55岁原发性高血压患者,指南判定高危的比例也超过1/3,和≥55岁高危比例相近,有高估此人群ASCVD危险的可能;5项心血管健康行为和因素,约70%患者具有2~3项健康行为和因素。加强原发性高血压患者可干预危险因素的控制,改善心血管健康可能是降低ASCVD危险的重要策略。
文摘把由 G. Thierrin和 A. Spoletini- Cherubini等人定义并研究的强可逆半群以及由 S.Bogdanovic研究的半准素半群分别推广为强可逆序半群和半准素序半群 .分别给出了半准素序半群和强可逆序半群类中的半准素序半群的刻划 ,还给出了其所有理想是素理想的强可逆序半群的刻划 .
