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学者姓名：刘丹
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Abstract ：
"十四五"期间民航业呈现新发展局面,探讨我国航空公司运营效率的影响因素有助于分析民航业的现状与管理成效,推进民航业有序高效地发展.将航空公司运营视为生产子过程和服务子过程两个阶段,选择考虑内生权重的动态网络数据包络分析模型测量我国航空公司的效率,采用面板数据回归模型和门槛模型探究影响效率的因素.研究结果表明:国内航空公司运营效率欠佳,服务子过程整体表现优于生产子过程;航班正常率对生产子过程效率具有显著正向影响,投诉率对生产和服务子过程均具有负向作用;机队组合对服务子过程效率的影响具有门槛效应,在不同水平下对航空公司运营效率有不同影响.因此,建议我国航空公司优化机队组合,降低运营成本;改进管理模式,减少航班延误;推动服务创新,提高服务质量.
Keyword ：
动态网络SBM 动态网络SBM 航空公司 航空公司 运营效率 运营效率 门槛模型 门槛模型
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| GB/T 7714 | 郑宇婷 , 孔舒君 , 刘丹 . 我国航空公司运营效率的影响因素研究 [J]. | 物流技术 , 2024 , 43 (12) : 126-138 . |
| MLA | 郑宇婷 等. "我国航空公司运营效率的影响因素研究" . | 物流技术 43 . 12 (2024) : 126-138 . |
| APA | 郑宇婷 , 孔舒君 , 刘丹 . 我国航空公司运营效率的影响因素研究 . | 物流技术 , 2024 , 43 (12) , 126-138 . |
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Abstract ：
“十四五”期间民航业呈现新发展局面，探讨我国航空公司运营效率的影响因素有助于分析民航业的现状与管理成效，推进民航业有序高效地发展。将航空公司运营视为生产子过程和服务子过程两个阶段，选择考虑内生权重的动态网络数据包络分析模型测量我国航空公司的效率，采用面板数据回归模型和门槛模型探究影响效率的因素。研究结果表明：国内航空公司运营效率欠佳，服务子过程整体表现优于生产子过程；航班正常率对生产子过程效率具有显著正向影响，投诉率对生产和服务子过程均具有负向作用；机队组合对服务子过程效率的影响具有门槛效应，在不同水平下对航空公司运营效率有不同影响。因此，建议我国航空公司优化机队组合，降低运营成本；改进管理模式，减少航班延误；推动服务创新，提高服务质量。
Keyword ：
动态网络SBM 动态网络SBM 航空公司 航空公司 运营效率 运营效率 门槛模型 门槛模型
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| GB/T 7714 | 郑宇婷 , 孔舒君 , 刘丹 . 我国航空公司运营效率的影响因素研究——基于动态网络SBM和门槛模型 [J]. | 物流技术 , 2024 , 43 (12) : 126-138 . |
| MLA | 郑宇婷 等. "我国航空公司运营效率的影响因素研究——基于动态网络SBM和门槛模型" . | 物流技术 43 . 12 (2024) : 126-138 . |
| APA | 郑宇婷 , 孔舒君 , 刘丹 . 我国航空公司运营效率的影响因素研究——基于动态网络SBM和门槛模型 . | 物流技术 , 2024 , 43 (12) , 126-138 . |
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Purpose - By studying the green development efficiency (GDE) of 33 cities in the provinces of Jiangsu, Zhejiang, and Fujian in China, this study strives to conduct an analysis of the sustainable practices implemented in these developed regions, and derive valuable insights that can foster the promotion of green transformation. Design/methodology/approach - First, the urban green development system (GDS) was decomposed into the economic benefit subsystem (EBS), social benefit subsystem (SBS), and pollution control subsystem (PCS). Then, a mixed network SBM model was proposed to evaluate the GDE during 20152020, with Moran's I and Bootstrap truncated regression model subsequently applied to measure the spatial characteristics and driving factors of efficiency. Findings - Subsystem efficiency presents a distribution trend of PCS > EBS > SBS. There is a particular spatial aggregation effect in EBS efficiency, whereas SBS and PCS efficiencies have no significant spatial autocorrelation. Furthermore, urbanization level contributes significantly to the efficiency of all subsystems; industrial structure, energy consumption, and technological innovation play a crucial role in EBS and SBS; external openness is a pivotal factor in SBS; and environmental regulation has a significant effect on PCS. Originality/value - This study further decomposes the black box of GDS into subsystems including the economy, society, and environment. Additionally, by employing a mixed network SBM model and Bootstrap truncated regression model to investigate efficiency and its driving factors from the subsystem perspective, it endeavors to derive more detailed research conclusions and policy implications.
Keyword ：
Bootstrap truncated regression model Bootstrap truncated regression model Driving factors Driving factors Green development efficiency Green development efficiency Mixed network SBM model Mixed network SBM model
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| GB/T 7714 | Liu, Dan , Liu, Tiange , Zheng, Yuting . Study on urban green development efficiency of Jiangsu, Zhejiang and Fujian in China: a mixed network SBM approach [J]. | KYBERNETES , 2024 , 54 (8) : 4436-4461 . |
| MLA | Liu, Dan 等. "Study on urban green development efficiency of Jiangsu, Zhejiang and Fujian in China: a mixed network SBM approach" . | KYBERNETES 54 . 8 (2024) : 4436-4461 . |
| APA | Liu, Dan , Liu, Tiange , Zheng, Yuting . Study on urban green development efficiency of Jiangsu, Zhejiang and Fujian in China: a mixed network SBM approach . | KYBERNETES , 2024 , 54 (8) , 4436-4461 . |
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As a sustainable and economical strategy, electrochemical nitrogen reduction reaction (eNRR) is a promising alternative of energy-intensive Haber-Bosch process to produce ammonia. Fabricating efficient catalysts for eNRR is still challenging due to the bottleneck of insufficient activity and low electron selectivity. Herein, phosphotungstic acid (PTA) as substrate to anchor cerium species on the 4-fold hollow site was prepared, which reaches high ammonia yield rates of 42 mu g h-1 mgcat-1 and Faradaic efficiencies of 9.2 % at-0.6 V versus reversible hydrogen electrode. Experiments and theoretical calculations reveal that the introduction of Ce species could significantly improve the electronic density of adjacent exposed W atoms, further boosting the effective adsorption and activation of N2 to form active *N2. Finally, the designed Ce-PTA catalysts show high electrocatalytic activity of N2 reduction into ammonia. This work highlights the important role of using PTA as substrate to prepare stable supported metal species for heterogeneous electrocatalysis.
Keyword ：
Ammonia synthesis Ammonia synthesis Ce species modification Ce species modification Electrocatalysis Electrocatalysis N2 reduction reaction N2 reduction reaction Phosphotungstic acid Phosphotungstic acid
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| GB/T 7714 | Liu, Dan , Yan, Hongping , Lin, Jiawei et al. Regulation of cerium species in Keggin structure of phosphotungstic acid for efficient nitrogen electroreduction to ammonia [J]. | CHEMICAL ENGINEERING SCIENCE , 2024 , 283 . |
| MLA | Liu, Dan et al. "Regulation of cerium species in Keggin structure of phosphotungstic acid for efficient nitrogen electroreduction to ammonia" . | CHEMICAL ENGINEERING SCIENCE 283 (2024) . |
| APA | Liu, Dan , Yan, Hongping , Lin, Jiawei , Lu, Suwei , Xie, Yaoqi , Peng, Xiaobo et al. Regulation of cerium species in Keggin structure of phosphotungstic acid for efficient nitrogen electroreduction to ammonia . | CHEMICAL ENGINEERING SCIENCE , 2024 , 283 . |
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以提高人民福利水平为导向,转变经济发展方式,是生态文明建设和可持续发展的必然要求.基于 2015-2020 年首批国家生态文明试验区福建、江西、贵州三省 26 个城市数据,运用网络SBM(Slacks Based Measure)模型测算其生态福利绩效,研究发现:(1)整体来看,在研究期内国家生态文明试验区城市生态福利绩效历年均值为 0.714,总体上未能实现DEA(Data Envelopment Analysis)有效,城市之间绩效差异较大,只有厦门实现DEA有效,整体城市生态福利绩效呈现先增长后缓慢降低的趋势,相较于研究初期有所增长.(2)区域来看,不同地区城市生态福利绩效有所差异,呈现出"福建最佳,贵州次之,江西最末"的态势.(3)子系统来看,两子系统绩效的不均衡是整体生态福利绩效水平不高的主要原因.为进一步加强生态文明建设,建议优化产业结构,推动产业绿色转型;加强创新能力,推进生态技术进步;深化区域合作,推进区域协同发展.
Keyword ：
国家生态文明试验区 国家生态文明试验区 城市生态福利绩效 城市生态福利绩效 生态文明 生态文明 网络SBM模型 网络SBM模型
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| GB/T 7714 | 刘丹 , 蒋政 , 郑宇婷 . 国家生态文明试验区城市生态福利绩效评价研究 [J]. | 福州大学学报（哲学社会科学版） , 2024 , 38 (3) : 60-70 . |
| MLA | 刘丹 et al. "国家生态文明试验区城市生态福利绩效评价研究" . | 福州大学学报（哲学社会科学版） 38 . 3 (2024) : 60-70 . |
| APA | 刘丹 , 蒋政 , 郑宇婷 . 国家生态文明试验区城市生态福利绩效评价研究 . | 福州大学学报（哲学社会科学版） , 2024 , 38 (3) , 60-70 . |
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在我国"十四五"规划提出加快数字化转型的背景下,培养拥有数字化能力的物流人才成为重中之重.结合数字化时代下对物流人才的要求,立足产业驱动,从制定物流人才培养方案、创新课堂教学设计、丰富实践教学场景、改革课程评价方式和开发数字化教学资源5 个维度,探索物流数字化人才培养路径,为培养高素质物流人才提供思路.
Keyword ：
产业驱动 产业驱动 人才培养 人才培养 数字化 数字化 物流管理 物流管理
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| GB/T 7714 | 刘丹 , 林杉杉 , 郑宇婷 . 基于产业驱动的物流数字化人才培养探索 [J]. | 物流工程与管理 , 2024 , 46 (5) : 109-111,132 . |
| MLA | 刘丹 et al. "基于产业驱动的物流数字化人才培养探索" . | 物流工程与管理 46 . 5 (2024) : 109-111,132 . |
| APA | 刘丹 , 林杉杉 , 郑宇婷 . 基于产业驱动的物流数字化人才培养探索 . | 物流工程与管理 , 2024 , 46 (5) , 109-111,132 . |
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Cu-based bimetallic catalysts have been studied in the electrocatalytic nitrate (NO3-) reduction reaction (NO3-RR) for a long time. However, few studies have focused on horizontal comparison of CuNi, CuCo, and CuFe (abbreviated as CuM) bimetallic catalysts in electrocatalytic NO3-RR for ammonia synthesis. Herein, we prepare the three series of Cu-based bimetallic catalysts, with different atom ratios of Cu/M (Cu/M = 7/3, 5/5, or 3/7) and ordered mesoporous carbon (OMC) as support (denoted as CuM/OMC). The characterization results reveal that the metallic particles of Cu and M components possess an intimate relationship on the CuM/ OMC catalysts. The electrocatalytic NO3-RR performance uncovers that the optimal NH3 yield rates of CuM/ OMC catalysts at -0.8 V (vs reversible hydrogen electrode (RHE)) follow this order: Cu5Fe5/OMC > Cu5Co5/OMC > Cu7Ni3/OMC > Cu/OMC > Fe/OMC > Co/OMC > Ni/OMC > OMC. The bimetallic CuM/OMC catalysts exhibit higher NH3 yield rates than the monometallic catalysts. This is attributed to strong synergistic effects between the Cu and M components. We expect that these insights can stimulate new developments of bimetallic catalysts in electrocatalysis.
Keyword ：
Ammonia synthesis Ammonia synthesis Bimetal Bimetal Cu-based catalyst Cu-based catalyst Electrocatalytic nitrate reduction Electrocatalytic nitrate reduction Synergistic effect Synergistic effect
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| GB/T 7714 | Zhao, Jing , Liu, Lijuan , Yang, Ya et al. Insights into Electrocatalytic Nitrate Reduction to Ammonia via Cu-Based Bimetallic Catalysts [J]. | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2023 . |
| MLA | Zhao, Jing et al. "Insights into Electrocatalytic Nitrate Reduction to Ammonia via Cu-Based Bimetallic Catalysts" . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2023) . |
| APA | Zhao, Jing , Liu, Lijuan , Yang, Ya , Liu, Dan , Peng, Xiaobo , Liang, Shijing et al. Insights into Electrocatalytic Nitrate Reduction to Ammonia via Cu-Based Bimetallic Catalysts . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2023 . |
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The Chinese government proposed the establishment of China National Ecological Civilization Pilot Zone in 2016 to further explore the coordinated development of economy and environment. Fujian, Jiangxi, and Guizhou provinces were selected as the first batch of pilot zones. After years of exploration, it is necessary to discuss and summarize the construction progress of the three pilot zones from the perspective of the city. In this study, first, the ecological civilization pilot zone construction system was decomposed into an economic construction subsystem (ECS) and an environmental optimization subsystem (EOS). Then, a two-stage network SBM model was adopted to calculate the efficiencies of the subsystems, and the Kruskal-Wallis test was used to measure the efficiency difference. Finally, a panel data regression model was applied to explore the influencing factors of both subsystems. The results show that the ECS efficiency is higher than that of the EOS, and the ECS efficiency in Fujian is significantly better than that in Jiangxi and Guizhou. However, there is no significant difference in EOS efficiency in the three provinces. Furthermore, industrial structure and population agglomeration have a significant effect on ECS efficiency, environmental regulation has a significant impact on EOS, and the technology level has a significant impact on both subsystems. Based on the results, policy implications for improving the efficiency of the two subsystems were given respectively.
Keyword ：
China National Ecological Civilization Pilot Zone China National Ecological Civilization Pilot Zone Efficiency evaluation Efficiency evaluation Influencing factors Influencing factors Network SBM model Network SBM model Nonparametric test Nonparametric test Panel data regression Panel data regression
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| GB/T 7714 | Liu, Dan , Liu, Tiange , Zheng, Yuting et al. The construction efficiency study of China National Ecological Civilization Pilot Zone with network SBM model: a city-based analysis [J]. | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2023 , 30 (16) : 47685-47698 . |
| MLA | Liu, Dan et al. "The construction efficiency study of China National Ecological Civilization Pilot Zone with network SBM model: a city-based analysis" . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 30 . 16 (2023) : 47685-47698 . |
| APA | Liu, Dan , Liu, Tiange , Zheng, Yuting , Zhang, Qi . The construction efficiency study of China National Ecological Civilization Pilot Zone with network SBM model: a city-based analysis . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2023 , 30 (16) , 47685-47698 . |
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构建城市生态文明评价指标体系有助于衡量城市生态文明的现状与管理成效，推进城市生态文明建设，但现有文献在构建评价指标体系时多存在主观性较强等问题。运用CiteSpace软件对中国知网和万方数据库中生态文明评价领域文献进行可视化分析，构建以“生态经济”、“生态环境”、“人居环境”、“环境保护”为框架的城市生态文明评价指标体系，并以贵阳市和莆田市为例，验证该指标体系的准确性与可行性。结果表明：所构建的指标体系具有区分度且与实际情况相符，可为城市生态文明建设评价提供理论参考。
Keyword ：
可视化 可视化 城市生态文明 城市生态文明 知识图谱 知识图谱 评价指标体系 评价指标体系
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| GB/T 7714 | 郑宇婷 , 唐靖滢 , 刘丹 . 基于知识图谱可视化的城市生态文明评价指标体系构建 [J]. | 大连海事大学学报(社会科学版) , 2022 , 21 (06) : 81-89 . |
| MLA | 郑宇婷 et al. "基于知识图谱可视化的城市生态文明评价指标体系构建" . | 大连海事大学学报(社会科学版) 21 . 06 (2022) : 81-89 . |
| APA | 郑宇婷 , 唐靖滢 , 刘丹 . 基于知识图谱可视化的城市生态文明评价指标体系构建 . | 大连海事大学学报(社会科学版) , 2022 , 21 (06) , 81-89 . |
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为推进航空公司绿色发展,从碳排放约束视角,运用含非期望产出网络SBM模型,测量亚太地区12家航空公司碳排放约束下的总体运营效率及其生产和消费阶段效率.结果表明:航空公司运营总效率受生产阶段效率和消费阶段效率共同影响,其中多数航空公司运营总效率无效是由不同阶段造成的;碳排放对航空公司消费阶段效率具有不同程度的负面影响.指出合理规划人力资源、促进燃油节约配置、提升运输服务质量、加大航空减排力度是提高碳排放约束下航空公司运营效率的主要途径.
Keyword ：
碳排放 碳排放 网络SBM模型 网络SBM模型 航空公司 航空公司 运营效率 运营效率
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| GB/T 7714 | 刘丹 , 王琦 . 碳排放约束下航空公司运营效率研究 [J]. | 大连海事大学学报（社会科学版） , 2022 , 21 (1) : 54-60 . |
| MLA | 刘丹 et al. "碳排放约束下航空公司运营效率研究" . | 大连海事大学学报（社会科学版） 21 . 1 (2022) : 54-60 . |
| APA | 刘丹 , 王琦 . 碳排放约束下航空公司运营效率研究 . | 大连海事大学学报（社会科学版） , 2022 , 21 (1) , 54-60 . |
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