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学者姓名：刘丹
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Abstract ：
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 . |
| MLA | Liu, Dan 等. "Study on urban green development efficiency of Jiangsu, Zhejiang and Fujian in China: a mixed network SBM approach" . | KYBERNETES (2024) . |
| 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 . |
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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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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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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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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 , 2023 , 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 (2023) . |
| 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 , 2023 , 283 . |
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With airlines operating in an imperfectly competitive market environment, this study focuses on the important role of price variables. A network data envelopment analysis (NDEA)-based Nerlovian profit inefficiency model for a group of international airlines was proposed, in which the property of unstorable intermediate outputs in the air transport industry is considered. The profit inefficiency of airlines is then decomposed into two stages: cost inefficiency in the production stage and revenue inefficiency in the consumption stage. Both cost inefficiency and revenue inefficiency are further decomposed into three sub-inefficiencies: technical inefficiency, price in-efficiency, and allocation inefficiency. The empirical results show that all airlines are profit inefficient and their profit inefficiency is due to different sub-inefficiency components. In terms of overall profit inefficiency, the revenue inefficiency at the consumption stage is the main cause, and price inefficiency is a major component of revenue inefficiency on average.
Keyword ：
Adjustable prices Adjustable prices Airline Airline Network DEA Network DEA Profit inefficiency Profit inefficiency
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| GB/T 7714 | Liu, Dan , Zhang, Jiahuang , Yu, Ming-Miin . Decomposing airline profit inefficiency in NDEA through the non-competitive Nerlovian profit inefficiency model [J]. | JOURNAL OF AIR TRANSPORT MANAGEMENT , 2022 , 107 . |
| MLA | Liu, Dan et al. "Decomposing airline profit inefficiency in NDEA through the non-competitive Nerlovian profit inefficiency model" . | JOURNAL OF AIR TRANSPORT MANAGEMENT 107 (2022) . |
| APA | Liu, Dan , Zhang, Jiahuang , Yu, Ming-Miin . Decomposing airline profit inefficiency in NDEA through the non-competitive Nerlovian profit inefficiency model . | JOURNAL OF AIR TRANSPORT MANAGEMENT , 2022 , 107 . |
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基于2015—2019年首批生态文明实验区福建、江西、贵州三省26个设区市数据，运用网络SBM模型打开生态文明建设系统“黑箱”,将生态文明建设绩效分解为经济发展子系统绩效和环境治理子系统绩效，对比研究综合绩效及两子系统绩效。研究表明：考察期内，福建、江西、贵州三省生态文明建设综合绩效偏低，受两子系统绩效共同影响，整体没有实现DEA有效；分区域看，福建的生态文明建设综合绩效最优，江西次之，贵州最末；分阶段看，经济发展子系统绩效高于环境治理子系统绩效。各设区市应从优化顶层设计、发展绿色经济、改善区域环境三方面着手，提升生态文明建设绩效，实现生态兴、文明兴。
Keyword ：
生态文明 生态文明 绩效评价 绩效评价 网络SBM模型 网络SBM模型
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| GB/T 7714 | 刘丹 , 张琦 , 刘俊玲 . 基于网络SBM模型的国家生态文明试验区建设绩效评价 [J]. | 福州大学学报(哲学社会科学版) , 2022 , 36 (02) : 36-43 . |
| MLA | 刘丹 et al. "基于网络SBM模型的国家生态文明试验区建设绩效评价" . | 福州大学学报(哲学社会科学版) 36 . 02 (2022) : 36-43 . |
| APA | 刘丹 , 张琦 , 刘俊玲 . 基于网络SBM模型的国家生态文明试验区建设绩效评价 . | 福州大学学报(哲学社会科学版) , 2022 , 36 (02) , 36-43 . |
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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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以提高绿色全要素生产率为导向，贯彻绿色发展理念，是实现高质量发展的必然要求。测度分析江苏、浙江、福建三省33个设区市2012—2018年城市经济发展与环境治理两个子系统绿色全要素生产率变化情况，结果表明：9个城市经济发展子系统与环境治理子系统绿色全要素生产率呈现上升趋势，14个城市呈现下降趋势。造成各城市绿色全要素生产率下降的原因包括建设绩效不佳和技术进步不足两个方面。为提升城市绿色全要素生产率，经济发展子系统应加强创新发展，优化产业结构，环境治理子系统要推进技术融合，健全体制机制。
Keyword ：
GML指数 GML指数 环境治理 环境治理 经济发展 经济发展 绿色全要素生产率 绿色全要素生产率 网络SBM模型 网络SBM模型
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| GB/T 7714 | 刘丹 , 刘天歌 , 郑宇婷 . 中国部分城市绿色全要素生产率测度及提升路径——基于网络SBM模型及GML指数 [J]. | 大连海事大学学报(社会科学版) , 2022 , 21 (03) : 56-65 . |
| MLA | 刘丹 et al. "中国部分城市绿色全要素生产率测度及提升路径——基于网络SBM模型及GML指数" . | 大连海事大学学报(社会科学版) 21 . 03 (2022) : 56-65 . |
| APA | 刘丹 , 刘天歌 , 郑宇婷 . 中国部分城市绿色全要素生产率测度及提升路径——基于网络SBM模型及GML指数 . | 大连海事大学学报(社会科学版) , 2022 , 21 (03) , 56-65 . |
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