Sustainability is popularly defined as meeting the needs of the present generation without compromising the ability of future generations to meet their own needs. Social, economic and environmental parameters are most...Sustainability is popularly defined as meeting the needs of the present generation without compromising the ability of future generations to meet their own needs. Social, economic and environmental parameters are most commonly accepted as the three pillars of sustainability. In this paper, various sustainability indicators have been identified during the construction stage for elevated transportation corridors and thereafter classified under various categories. Using fuzzy VIKOR technique, sustainability evaluation of transportation corridors is made on two selected project sites of two different government organizations using various identified sustainability indicators, i.e., a 3.2-km long elevated road project under construction from Vikaspuri to Meerabagh in West Delhi by PWD （Public Works Department） and the metro rail elevated corridor （part） from Punjabi Bagh to Mayapuri as a part of Phase 3, Line 7 by DMRC （Delhi Metro Rail Corporation）. The study is made at both sites in the midst of the construction period and it is identified that during the construction stage, the sustainability of these transportation corridors is just not limited to three pillars, but in actuality, it is much beyond that. From the study, it is inferred that the metro rail elevated corridor is a more sustainable corridor, in the context of the identified sustainability indicators.展开更多
【目的】系统探究柴达木盆地耕地耕层土壤盐碱化水平及养分状况,优化柴达木盆地耕地耕层土壤评价因子,构建评价与诊断模型,为区域粮食安全和生态可持续发展提供科学依据。【方法】以柴达木盆地耕作层土壤为对象,基于470个土壤样品的11...【目的】系统探究柴达木盆地耕地耕层土壤盐碱化水平及养分状况,优化柴达木盆地耕地耕层土壤评价因子,构建评价与诊断模型,为区域粮食安全和生态可持续发展提供科学依据。【方法】以柴达木盆地耕作层土壤为对象,基于470个土壤样品的11项土壤指标(全盐:TS、电导率:EC、全氮:TN、全磷:TP、速效氮:AN、速效磷:AP、pH、有机质:SOM、钠离子:Na^(+)、氯离子:Cl^(-)、硫酸根离子:SO_(4)^(2-)),通过主成分分析(PCA)与Norm值构建最小数据集(Minimum data set,MDS),结合多准则妥协解排序法(VIKOR法),系统评价土壤质量指数(Soil quality index,SQI)并诊断主要障碍因子。【结果】研究区土壤呈现显著盐碱化风险(TS均值2.449 g/kg,C_(V)=53.98%)和氮磷养分限制特征(TN均值为0.916 mg/kg,TP的C_(V)为118.38%);MDS筛选出TS、TN、TP、AP、Cl^(-)和SO_(4)^(2-)等6项核心指标,可替代全数据集(Total data set,TDS)精准评价土壤质量(R^(2)=0.904);VIKOR模型显示,格尔木和大柴旦地区土壤综合障碍度最高(群体效应值S>0.46),TP与SO_(4)^(2-)是主要限制因子,德令哈土壤质量最优(SQI=0.284)。【讨论】研究揭示了盐碱化与养分失衡对干旱区土壤质量的协同制约效应,为柴达木盆地耕地定向改良提供了科学依据。展开更多
针对装备征用动员中器材需求不确定性大、响应时效性和质量要求高等特点,构建基于军事供应链的装备器材供应商选优评价准则体系,为解决不同准则带来的多种异质评价信息及准则权重、决策者权重均未知的多准则群决策问题,提出了一种基于...针对装备征用动员中器材需求不确定性大、响应时效性和质量要求高等特点,构建基于军事供应链的装备器材供应商选优评价准则体系,为解决不同准则带来的多种异质评价信息及准则权重、决策者权重均未知的多准则群决策问题,提出了一种基于直觉模糊熵和扩展多准则妥协解(VlseKriterijumska Optimizacija I Kompromisno Resenje,VIKOR)框架的决策方法。首先,采用包含隶属度与非隶属度偏差及犹豫度信息的直觉模糊熵,基于熵权法和权重协调系数确定综合准则权重;其次,综合考虑决策矩阵直觉模糊熵和距离测度,建立一种新的决策者权重方法;然后,采用直觉模糊加权平均算子得到决策者和决策群体综合评价矩阵;最后,将VIKOR方法扩展到直觉模糊语言环境,对备选供应商进行折衷排序和选优。展开更多
文摘Sustainability is popularly defined as meeting the needs of the present generation without compromising the ability of future generations to meet their own needs. Social, economic and environmental parameters are most commonly accepted as the three pillars of sustainability. In this paper, various sustainability indicators have been identified during the construction stage for elevated transportation corridors and thereafter classified under various categories. Using fuzzy VIKOR technique, sustainability evaluation of transportation corridors is made on two selected project sites of two different government organizations using various identified sustainability indicators, i.e., a 3.2-km long elevated road project under construction from Vikaspuri to Meerabagh in West Delhi by PWD （Public Works Department） and the metro rail elevated corridor （part） from Punjabi Bagh to Mayapuri as a part of Phase 3, Line 7 by DMRC （Delhi Metro Rail Corporation）. The study is made at both sites in the midst of the construction period and it is identified that during the construction stage, the sustainability of these transportation corridors is just not limited to three pillars, but in actuality, it is much beyond that. From the study, it is inferred that the metro rail elevated corridor is a more sustainable corridor, in the context of the identified sustainability indicators.
文摘【目的】系统探究柴达木盆地耕地耕层土壤盐碱化水平及养分状况,优化柴达木盆地耕地耕层土壤评价因子,构建评价与诊断模型,为区域粮食安全和生态可持续发展提供科学依据。【方法】以柴达木盆地耕作层土壤为对象,基于470个土壤样品的11项土壤指标(全盐:TS、电导率:EC、全氮:TN、全磷:TP、速效氮:AN、速效磷:AP、pH、有机质:SOM、钠离子:Na^(+)、氯离子:Cl^(-)、硫酸根离子:SO_(4)^(2-)),通过主成分分析(PCA)与Norm值构建最小数据集(Minimum data set,MDS),结合多准则妥协解排序法(VIKOR法),系统评价土壤质量指数(Soil quality index,SQI)并诊断主要障碍因子。【结果】研究区土壤呈现显著盐碱化风险(TS均值2.449 g/kg,C_(V)=53.98%)和氮磷养分限制特征(TN均值为0.916 mg/kg,TP的C_(V)为118.38%);MDS筛选出TS、TN、TP、AP、Cl^(-)和SO_(4)^(2-)等6项核心指标,可替代全数据集(Total data set,TDS)精准评价土壤质量(R^(2)=0.904);VIKOR模型显示,格尔木和大柴旦地区土壤综合障碍度最高(群体效应值S>0.46),TP与SO_(4)^(2-)是主要限制因子,德令哈土壤质量最优(SQI=0.284)。【讨论】研究揭示了盐碱化与养分失衡对干旱区土壤质量的协同制约效应,为柴达木盆地耕地定向改良提供了科学依据。
文摘针对装备征用动员中器材需求不确定性大、响应时效性和质量要求高等特点,构建基于军事供应链的装备器材供应商选优评价准则体系,为解决不同准则带来的多种异质评价信息及准则权重、决策者权重均未知的多准则群决策问题,提出了一种基于直觉模糊熵和扩展多准则妥协解(VlseKriterijumska Optimizacija I Kompromisno Resenje,VIKOR)框架的决策方法。首先,采用包含隶属度与非隶属度偏差及犹豫度信息的直觉模糊熵,基于熵权法和权重协调系数确定综合准则权重;其次,综合考虑决策矩阵直觉模糊熵和距离测度,建立一种新的决策者权重方法;然后,采用直觉模糊加权平均算子得到决策者和决策群体综合评价矩阵;最后,将VIKOR方法扩展到直觉模糊语言环境,对备选供应商进行折衷排序和选优。
