The karst mountainous area is an ecologically fragile region with prominent humanland contradictions.The resource-environment carrying capacity(RECC)of this region needs to be further clarified.The development of remo...The karst mountainous area is an ecologically fragile region with prominent humanland contradictions.The resource-environment carrying capacity(RECC)of this region needs to be further clarified.The development of remote sensing(RS)and geographic information system(GIS)provides data sources and processing platform for RECC monitoring.This study analyzed and established the evaluation index system of RECC by considering particularity in the karst mountainous area of Southwest China;processed multisource RS data(Sentinel-2,Aster-DEM and Landsat-8)to extract the spatial distributions of nine key indexes by GIS techniques(information classification,overlay analysis and raster calculation);proposed the methods of index integration and fuzzy comprehensive evaluation of the RECC by GIS;and took a typical area,Guangnan County in Yunnan Province of China,as an experimental area to explore the effectiveness of the indexes and methods.The results showed that:(1)The important indexes affecting the RECC of karst mountainous area are water resources,tourism resources,position resources,geographical environment and soil erosion environment.(2)Data on cultivated land,construction land,minerals,transportation,water conservancy,ecosystem services,topography,soil erosion and rocky desertification can be obtained from RS data.GIS techniques integrate the information into the RECC results.The data extraction and processing methods are feasible on evaluating RECC.(3)The RECC of Guangnan County was in the mid-carrying level in 2018.The midcarrying and low-carrying levels were the main types,accounting for more than 80.00%of the total study area.The areas with high carrying capacity were mainly distributed in the northern regions of the northwest-southeast line of the county,and other areas have a low carrying capacity comparatively.The coordination between regional resource-environment status and socioeconomic development is the key to improve RECC.This study explores the evaluation index system of RECC in karst mountainous area and the application of multisource RS data and GIS techniques in the comprehensive evaluation.The methods can be applied in related fields to provide suggestions for data/information extraction and integration,and sustainable development.展开更多
This study aims at determining the optimal CO2 separation technology for Chinese refineries, based on current available technologies, by the method of comprehensive evaluation. Firstly, according to the characteristic...This study aims at determining the optimal CO2 separation technology for Chinese refineries, based on current available technologies, by the method of comprehensive evaluation. Firstly, according to the characteristics of flue gas from Chinese refineries, three feasible CO2 separation technologies are selected. These are pressure swing adsorption （PSA）, chemical absorption （CA）, and membrane absorption （MA）. Secondly, an economic assessment of these three techniques is carried out in accordance with cash flow analysis. The results show that these three techniques all have economic feasibility and the PSA technique is the best. Finally, to further optimize the three techniques, a two-level fuzzy comprehensive evaluation model is established, including economic, technological, and environmental factors. Considering all the factors, PSA is optimal for Chinese refineries, followed by CA and MA. Therefore, to reduce Chinese refineries carbon emission, it is suggested that CO2 should be captured from off-gases using PSA.展开更多
Objective: To assess comprehensive care in the elderly population, as well as the quality of care in Primary Health Care. Methods: This is an exploratory descriptive study with a quantitative approach, conducted from ...Objective: To assess comprehensive care in the elderly population, as well as the quality of care in Primary Health Care. Methods: This is an exploratory descriptive study with a quantitative approach, conducted from July to December 2012, in the city of Santa Cruz, Rio Grande do Norte, Brazil. A sample of 130 subjects chosen by drawn was calculated, and data collection was performed at their homes. Results: There were interviewed 130 people, 92 (70.8%) women and 38 men (29.2%), with a minimum age of 60 and maximum of 96 years, with a mean of 72.8, median of 72.0 and a standard deviation of 8.3. Regarding the quality of care ratings of the PHC team, 48.5% (n = 63) of respondents stated this to be good, while 32.3% (n = 42) rated this as fair. Conclusions: In this perspective, one of the most appreciated meanings that were given to comprehensive care by health care professionals refers to holistic knowledge of each patient, resulting in the non-fragmentation of care. Thus, it is noticed that comprehensiveness has some weaknesses that need to be corrected, which shows the need for education and training of professionals assigned to primary health care services.展开更多
目前储能技术路线多样,不同类型的储能各具应用前景,但储能选型需要综合考虑经济性、安全性等因素,是一个复杂的多目标决策问题,因此储能选型是工程应用中的关键问题之一。提出一种将层次分析法(analytic hierarchy process,AHP)和优劣...目前储能技术路线多样,不同类型的储能各具应用前景,但储能选型需要综合考虑经济性、安全性等因素,是一个复杂的多目标决策问题,因此储能选型是工程应用中的关键问题之一。提出一种将层次分析法(analytic hierarchy process,AHP)和优劣解距离法(technique for order preference by similarity to ideal solution,TOPSIS)-模糊综合分析法相结合的储能选型评价体系。首先,通过建立评价体系的判断矩阵,利用AHP获取指标权重;其次,将判断矩阵里量纲不同的指标类型用TOPSIS做规范化处理,以此获得更客观的权重向量,改善AHP法的主观性;而后,将指标权重对角化处理并与标准化后的矩阵相乘获得加权判断矩阵,并求取贴近度向量。最后,加权判断矩阵与模糊综合分析法关系矩阵相乘获取储能类型的隶属度评价结果,并以隶属度最大值所在的等级为最终评价,处于等级Ⅰ中最佳,等级Ⅱ次之并以此类推;由此通过TOPSIS获得更客观的权重向量,改善AHP法的主观性,得到的权重向量也更客观。最后以锂离子电池、钠硫电池和铅酸电池等七种储能类型在应用于削峰填谷、电网保供电和改善电压质量场景为例,并与现有的储能选型方法进行比较,体现该评价体系的创新,检验所提评价体系和选型方法的有效性。展开更多
环氧树脂是古建筑木构件修复加固的常用材料,为了科学合理地使用环氧树脂,基于多准则决策理论建立古建筑木构件修复加固用环氧树脂性能评价模型。参考古建筑木构件修复加固工程对环氧树脂的要求与相关标准确定环氧树脂的性能指标集合,...环氧树脂是古建筑木构件修复加固的常用材料,为了科学合理地使用环氧树脂,基于多准则决策理论建立古建筑木构件修复加固用环氧树脂性能评价模型。参考古建筑木构件修复加固工程对环氧树脂的要求与相关标准确定环氧树脂的性能指标集合,采用熵权法与层次分析法分别得到各性能指标客观权重与主观权重,综合主客观权重对各性能指标赋权,使用优序法与逼近理想解排序法(technique for order preference similar to an ideal solution,TOPSIS法)结合各性能指标复合权重构建两种综合性能评价模型。通过验证试验对十组环氧树脂进行综合性能评价,结果表明复合加权TOPSIS综合性能评价模型更全面客观,更适用于古建筑木构件修复加固用环氧树脂,可作为选择和使用环氧树脂的参考方法。展开更多
针对赣南大道下穿赣深高铁桥梁近接桥墩段路基施工优化比选问题,提出了一种基于层次分析法(Analytic Hierarchy Process,AHP)-指标相关性权重确定法(Criteria Importance Through Intercriteria Correlation,CRITIC)和逼近理想解排序法(...针对赣南大道下穿赣深高铁桥梁近接桥墩段路基施工优化比选问题,提出了一种基于层次分析法(Analytic Hierarchy Process,AHP)-指标相关性权重确定法(Criteria Importance Through Intercriteria Correlation,CRITIC)和逼近理想解排序法(Technique for Order Preference by Similarity to Ideal Solution,TOPSIS)的多因子多方案综合评价方法。首先,基于结构变形、内力变化和经济指标构建了客观可量化的下穿工程综合评价指标体系;其次,基于各评价指标的价值差异问题,提出了AHP-CRITIC综合赋权法,利用最小鉴别信息原理将主、客观权重相结合,充分考虑了下穿工程评价中主观判断的重要作用及评价指标间信息量的对比强度和冲突性;最后,利用TOPSIS法求得多维空间中样本点到理想样本的正、负理想距离,通过计算相对贴进度对下穿施工工法进行定量排序。研究表明,该方法对下穿工程评价的影响因素复杂性和评价标准模糊性具有良好的处理效果,为方案评估优化提供了一条有效途径。展开更多
为科学有效地评价一线矿工不安全状态,进一步提升煤矿安全管理水平,以一线矿工作为研究对象,借助文献分析法获取不安全状态影响因素,编制问卷进行调查;运用SPSS 26.0软件对有效问卷数据进行探索性因子分析,构建一线矿工不安全状态评价...为科学有效地评价一线矿工不安全状态,进一步提升煤矿安全管理水平,以一线矿工作为研究对象,借助文献分析法获取不安全状态影响因素,编制问卷进行调查;运用SPSS 26.0软件对有效问卷数据进行探索性因子分析,构建一线矿工不安全状态评价指标体系;在此基础上,应用MATLAB R2018a软件计算,使用熵权逼近理想解排序法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)对10名一线矿工不安全状态进行综合评价。结果表明:在一线矿工不安全状态的12个评价指标中,家庭支持重要度最大,自我效能重要度最小;采用熵权TOPSIS法对一线矿工不安全状态进行综合评价是客观合理可行的;3号、8号和9号一线矿工不安全状态等级高于Ⅲ级,其工作安全性低,应引起煤矿重视。研究结果对煤矿井下人因事故的防控具有一定的指导作用。展开更多
目的建立同时测定马齿苋中10个指标成分含量的高效液相色谱法(high performance liquid chromatography,HPLC),用化学计量学和熵权-逼近理想解排序法(entropy weight-technique for order preference by similarity to an ideal solutio...目的建立同时测定马齿苋中10个指标成分含量的高效液相色谱法(high performance liquid chromatography,HPLC),用化学计量学和熵权-逼近理想解排序法(entropy weight-technique for order preference by similarity to an ideal solution,EW-TOPSIS)对马齿苋的质量进行综合分析和评价,为该产品质量控制和标准提升提供参考依据。方法用高效液相色谱法同时测定5省18批马齿苋样品中柠檬酸、琥珀酸、咖啡酸、染料木苷、木犀草素、槲皮素、东莨菪亭、6,7-二羟基香豆素、异茴香内酯和佛手柑内酯的含量,用化学计量学方法对含量测定结果进行综合分析,挖掘影响马齿苋质量的主要潜在标志物,联合熵权-逼近理想解排序法对不同产地来源的马齿苋进行质量评价。结果10种成分分别在各自线性范围内线性关系和准确度良好;化学计量学分析结果显示,18批马齿苋聚为3类,呈现一定的产区差异;木犀草素、槲皮素、琥珀酸和柠檬酸是影响马齿苋产品质量的主要潜在标志物;熵权-逼近理想解排序法分析结果显示四川和贵州地区所产马齿苋质量最优,其次为河南、辽宁和吉林。结论所建立的高效液相色谱法能同时测定马齿苋中10个指标成分的含量,化学计量学和熵权-逼近理想解排序法可用于马齿苋的综合质量评价。展开更多
Finding the optimal optoelectronic properties(zero-order optical transmittance,shielding effectiveness,and stray light uniformity)of metallic mesh is significant for its application in electromagnetic interference shi...Finding the optimal optoelectronic properties(zero-order optical transmittance,shielding effectiveness,and stray light uniformity)of metallic mesh is significant for its application in electromagnetic interference shielding areas.However,there are few relevant studies at present.Based on optoelectronic properties,we propose a comprehensive evaluation factor Q,which is simple in form and can be used to evaluate the mesh with different parameters in a simple and efficient way.The effectivity of Q is verified by comparing the trend of Q values with the evaluation results of the technique for order preference by similarity to ideal solution(TOPSIS).The evaluation factor Q can also be extended to evaluate the optoelectronic properties of different kinds of metallic meshes,which makes it extremely favorable for metallic mesh design and application.展开更多
基金the support given by the government and official in Guangnan Countyfunded by[National Natural Science Foundation of China]grant number[41361020,40961031]+3 种基金[Joint Fund of Yunnan Provincial Science and Technology Department and Yunnan University]grant number[2018FY001(-017)][Project of Innovative Talents Cultivation for Graduate Students of Yunnan University]grant number[C176230200][Project of Internationalization and Cultural Inheritance and Innovation of Yunnan University]grant number[C176250202][Science Research Fund of Yunnan Provincial Education Department in 2020:Postgraduate]grant number[2020Y0030]。
文摘The karst mountainous area is an ecologically fragile region with prominent humanland contradictions.The resource-environment carrying capacity(RECC)of this region needs to be further clarified.The development of remote sensing(RS)and geographic information system(GIS)provides data sources and processing platform for RECC monitoring.This study analyzed and established the evaluation index system of RECC by considering particularity in the karst mountainous area of Southwest China;processed multisource RS data(Sentinel-2,Aster-DEM and Landsat-8)to extract the spatial distributions of nine key indexes by GIS techniques(information classification,overlay analysis and raster calculation);proposed the methods of index integration and fuzzy comprehensive evaluation of the RECC by GIS;and took a typical area,Guangnan County in Yunnan Province of China,as an experimental area to explore the effectiveness of the indexes and methods.The results showed that:(1)The important indexes affecting the RECC of karst mountainous area are water resources,tourism resources,position resources,geographical environment and soil erosion environment.(2)Data on cultivated land,construction land,minerals,transportation,water conservancy,ecosystem services,topography,soil erosion and rocky desertification can be obtained from RS data.GIS techniques integrate the information into the RECC results.The data extraction and processing methods are feasible on evaluating RECC.(3)The RECC of Guangnan County was in the mid-carrying level in 2018.The midcarrying and low-carrying levels were the main types,accounting for more than 80.00%of the total study area.The areas with high carrying capacity were mainly distributed in the northern regions of the northwest-southeast line of the county,and other areas have a low carrying capacity comparatively.The coordination between regional resource-environment status and socioeconomic development is the key to improve RECC.This study explores the evaluation index system of RECC in karst mountainous area and the application of multisource RS data and GIS techniques in the comprehensive evaluation.The methods can be applied in related fields to provide suggestions for data/information extraction and integration,and sustainable development.
基金the China University of Petroleum Foundationthe Research Institute of Safety and Environment TechnologyChina National Petroleum Corporation
文摘This study aims at determining the optimal CO2 separation technology for Chinese refineries, based on current available technologies, by the method of comprehensive evaluation. Firstly, according to the characteristics of flue gas from Chinese refineries, three feasible CO2 separation technologies are selected. These are pressure swing adsorption （PSA）, chemical absorption （CA）, and membrane absorption （MA）. Secondly, an economic assessment of these three techniques is carried out in accordance with cash flow analysis. The results show that these three techniques all have economic feasibility and the PSA technique is the best. Finally, to further optimize the three techniques, a two-level fuzzy comprehensive evaluation model is established, including economic, technological, and environmental factors. Considering all the factors, PSA is optimal for Chinese refineries, followed by CA and MA. Therefore, to reduce Chinese refineries carbon emission, it is suggested that CO2 should be captured from off-gases using PSA.
文摘Objective: To assess comprehensive care in the elderly population, as well as the quality of care in Primary Health Care. Methods: This is an exploratory descriptive study with a quantitative approach, conducted from July to December 2012, in the city of Santa Cruz, Rio Grande do Norte, Brazil. A sample of 130 subjects chosen by drawn was calculated, and data collection was performed at their homes. Results: There were interviewed 130 people, 92 (70.8%) women and 38 men (29.2%), with a minimum age of 60 and maximum of 96 years, with a mean of 72.8, median of 72.0 and a standard deviation of 8.3. Regarding the quality of care ratings of the PHC team, 48.5% (n = 63) of respondents stated this to be good, while 32.3% (n = 42) rated this as fair. Conclusions: In this perspective, one of the most appreciated meanings that were given to comprehensive care by health care professionals refers to holistic knowledge of each patient, resulting in the non-fragmentation of care. Thus, it is noticed that comprehensiveness has some weaknesses that need to be corrected, which shows the need for education and training of professionals assigned to primary health care services.
文摘目前储能技术路线多样,不同类型的储能各具应用前景,但储能选型需要综合考虑经济性、安全性等因素,是一个复杂的多目标决策问题,因此储能选型是工程应用中的关键问题之一。提出一种将层次分析法(analytic hierarchy process,AHP)和优劣解距离法(technique for order preference by similarity to ideal solution,TOPSIS)-模糊综合分析法相结合的储能选型评价体系。首先,通过建立评价体系的判断矩阵,利用AHP获取指标权重;其次,将判断矩阵里量纲不同的指标类型用TOPSIS做规范化处理,以此获得更客观的权重向量,改善AHP法的主观性;而后,将指标权重对角化处理并与标准化后的矩阵相乘获得加权判断矩阵,并求取贴近度向量。最后,加权判断矩阵与模糊综合分析法关系矩阵相乘获取储能类型的隶属度评价结果,并以隶属度最大值所在的等级为最终评价,处于等级Ⅰ中最佳,等级Ⅱ次之并以此类推;由此通过TOPSIS获得更客观的权重向量,改善AHP法的主观性,得到的权重向量也更客观。最后以锂离子电池、钠硫电池和铅酸电池等七种储能类型在应用于削峰填谷、电网保供电和改善电压质量场景为例,并与现有的储能选型方法进行比较,体现该评价体系的创新,检验所提评价体系和选型方法的有效性。
文摘环氧树脂是古建筑木构件修复加固的常用材料,为了科学合理地使用环氧树脂,基于多准则决策理论建立古建筑木构件修复加固用环氧树脂性能评价模型。参考古建筑木构件修复加固工程对环氧树脂的要求与相关标准确定环氧树脂的性能指标集合,采用熵权法与层次分析法分别得到各性能指标客观权重与主观权重,综合主客观权重对各性能指标赋权,使用优序法与逼近理想解排序法(technique for order preference similar to an ideal solution,TOPSIS法)结合各性能指标复合权重构建两种综合性能评价模型。通过验证试验对十组环氧树脂进行综合性能评价,结果表明复合加权TOPSIS综合性能评价模型更全面客观,更适用于古建筑木构件修复加固用环氧树脂,可作为选择和使用环氧树脂的参考方法。
文摘针对赣南大道下穿赣深高铁桥梁近接桥墩段路基施工优化比选问题,提出了一种基于层次分析法(Analytic Hierarchy Process,AHP)-指标相关性权重确定法(Criteria Importance Through Intercriteria Correlation,CRITIC)和逼近理想解排序法(Technique for Order Preference by Similarity to Ideal Solution,TOPSIS)的多因子多方案综合评价方法。首先,基于结构变形、内力变化和经济指标构建了客观可量化的下穿工程综合评价指标体系;其次,基于各评价指标的价值差异问题,提出了AHP-CRITIC综合赋权法,利用最小鉴别信息原理将主、客观权重相结合,充分考虑了下穿工程评价中主观判断的重要作用及评价指标间信息量的对比强度和冲突性;最后,利用TOPSIS法求得多维空间中样本点到理想样本的正、负理想距离,通过计算相对贴进度对下穿施工工法进行定量排序。研究表明,该方法对下穿工程评价的影响因素复杂性和评价标准模糊性具有良好的处理效果,为方案评估优化提供了一条有效途径。
文摘为科学有效地评价一线矿工不安全状态,进一步提升煤矿安全管理水平,以一线矿工作为研究对象,借助文献分析法获取不安全状态影响因素,编制问卷进行调查;运用SPSS 26.0软件对有效问卷数据进行探索性因子分析,构建一线矿工不安全状态评价指标体系;在此基础上,应用MATLAB R2018a软件计算,使用熵权逼近理想解排序法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)对10名一线矿工不安全状态进行综合评价。结果表明:在一线矿工不安全状态的12个评价指标中,家庭支持重要度最大,自我效能重要度最小;采用熵权TOPSIS法对一线矿工不安全状态进行综合评价是客观合理可行的;3号、8号和9号一线矿工不安全状态等级高于Ⅲ级,其工作安全性低,应引起煤矿重视。研究结果对煤矿井下人因事故的防控具有一定的指导作用。
文摘目的建立同时测定马齿苋中10个指标成分含量的高效液相色谱法(high performance liquid chromatography,HPLC),用化学计量学和熵权-逼近理想解排序法(entropy weight-technique for order preference by similarity to an ideal solution,EW-TOPSIS)对马齿苋的质量进行综合分析和评价,为该产品质量控制和标准提升提供参考依据。方法用高效液相色谱法同时测定5省18批马齿苋样品中柠檬酸、琥珀酸、咖啡酸、染料木苷、木犀草素、槲皮素、东莨菪亭、6,7-二羟基香豆素、异茴香内酯和佛手柑内酯的含量,用化学计量学方法对含量测定结果进行综合分析,挖掘影响马齿苋质量的主要潜在标志物,联合熵权-逼近理想解排序法对不同产地来源的马齿苋进行质量评价。结果10种成分分别在各自线性范围内线性关系和准确度良好;化学计量学分析结果显示,18批马齿苋聚为3类,呈现一定的产区差异;木犀草素、槲皮素、琥珀酸和柠檬酸是影响马齿苋产品质量的主要潜在标志物;熵权-逼近理想解排序法分析结果显示四川和贵州地区所产马齿苋质量最优,其次为河南、辽宁和吉林。结论所建立的高效液相色谱法能同时测定马齿苋中10个指标成分的含量,化学计量学和熵权-逼近理想解排序法可用于马齿苋的综合质量评价。
基金Project supported by the National Natural Science Foundation of China(No.61975046)。
文摘Finding the optimal optoelectronic properties(zero-order optical transmittance,shielding effectiveness,and stray light uniformity)of metallic mesh is significant for its application in electromagnetic interference shielding areas.However,there are few relevant studies at present.Based on optoelectronic properties,we propose a comprehensive evaluation factor Q,which is simple in form and can be used to evaluate the mesh with different parameters in a simple and efficient way.The effectivity of Q is verified by comparing the trend of Q values with the evaluation results of the technique for order preference by similarity to ideal solution(TOPSIS).The evaluation factor Q can also be extended to evaluate the optoelectronic properties of different kinds of metallic meshes,which makes it extremely favorable for metallic mesh design and application.
