Article
Energy & Fuels
Clement Tengey, Nnamdi Ikechi Nwulu, Omoseni Adepoju, Omowunmi Mary Longe
Summary: This paper aims to assess the productivity dynamics of electricity distribution regions (EDRs) in Ghana and analyze their effectiveness using the data envelopment analysis (DEA) methodology. The study finds that the productivity of EDRs in Ghana has been growing at an annual rate of 16.23% over the sample period, driven mainly by technological change.
Article
Thermodynamics
Zhiqiang Geng, Guanliang Song, Yongming Han, Chong Chu
Summary: This study introduces a novel static and dynamic energy structure analysis method, which evaluates the energy structures of 24 countries by integrating data envelopment analysis. The results show that the energy efficiency of developed countries in the world is generally higher than that of developing countries, and through slack variable analysis, the energy efficiency of inefficient countries can be improved and carbon dioxide emissions can be reduced.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Shixin Gong
Summary: This study proposes a multi-scale energy efficiency recognition and diagnosis scheme based on a hierarchical multi-indicator system to achieve a comprehensive energy efficiency diagnosis and anomaly analysis for ethylene production. The scheme includes three steps: abnormal energy efficiency recognition from a single-indicator scale to a multi-indicator scale, energy efficiency analysis using the Malmquist production index, and preliminary abnormal cause diagnosis using principal component analysis. The results show that the scheme can effectively identify abnormal energy efficiency in ethylene production.
Article
Construction & Building Technology
Wei Liu, Zhuan He, Huapeng Chen, Cheng Lin
Summary: This study constructed an input-output index system for Chinese green buildings and used the basic model Data Envelopment Analysis (DEA) and DEA-Malmquist index method to measure and analyze the implementation efficiency of Chinese green buildings. The research found that the comprehensive implementation management efficiency of Chinese green buildings was lower, but the development tendency was good. There was a remarkable regional difference, with the overall development pattern of east > middle > west.
Article
Green & Sustainable Science & Technology
Fairuz Suzana Mohd Chachuli, Norasikin Ahmad Ludin, Muhamad Alias Md Jedi, Norul Hisham Hamid
Summary: Using DEA and MI methods, this study evaluates the impact of renewable energy policy transitions on efficiency and social benefits in Malaysia, with results showing the highest efficiency in East Malaysia, fluctuations in renewable energy efficiency during policy transitions, and significant social benefits created in the solar photovoltaic industry.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Management
Esteban Lafuente, Zoltan J. Acs, Laszlo Szerb
Summary: The article employs the 'benefit of the doubt' approach to evaluate the entrepreneurial ecosystem of 71 countries. The proposed analysis method allows the computation of country-specific weights for more informed policy making. The findings suggest that customized policies are necessary for optimizing the resources deployed to enhance the entrepreneurial ecosystem, and improvements in the ecosystem quality are positively correlated with venture capital investments.
Article
Construction & Building Technology
Xia Liu, Zezhou Wu, Peiying Xie, Qing Hong, Xi Hu, Maxwell Fordjour Antwi-Afari
Summary: The rapid development of urbanization in China has led to significant amounts of construction waste, which poses challenges to the sustainable development of the construction industry. This study evaluates the environmental efficiency of construction waste generation in China from both static and dynamic perspectives. The findings suggest that the environmental efficiency of construction waste generation in China has been declining over the years, but there are signs of improvement from a dynamic point of view, particularly in the eastern region.
Article
Environmental Studies
Xiaohong Liu, Jiangjiang Yang, Chengzhen Xu, Xingchen Li, Qingyuan Zhu
Summary: Facing environmental problems, the Chinese government uses environmental regulation as a way to reduce emissions and control pollution. This study proposes the meta-frontier MML index to analyze China's regional environmental regulation efficiency, considering regional heterogeneity. The results show that the efficiency has increased from 2014 to 2018, with the eastern region contributing the most and the midwestern region having a lower contribution. The main contributors to the change in efficiency vary among the regions.
Article
Management
Chiang Kao, Shiang-Tai Liu
Summary: Data envelopment analysis is a technique used for measuring the efficiency of decision-making units and ranking alternatives. This paper proposes a method for determining appropriate weights to calculate the efficiency of alternatives based on expert opinions. Radial and SBM models are constructed, showing that the results obtained from aggregating expert opinions at different levels are consistent, with SBM efficiency being more reliable than radial efficiency for ranking purposes.
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2022)
Article
Thermodynamics
Beijia Huang, Long Zhang, Linmao Ma, Wuliyasu Bai, Jingzheng Ren
Summary: Energy security performances of Chinese provinces vary significantly, with better performance in eastern and southern coastal provinces. The middle and western provinces seem to have made more progress in energy security performance, despite China's rapid growth in energy consumption. Technological progress and energy innovations are key to improving China's energy security.
Article
Management
Zhi Chen, Jiaqi Shi, Mengying Xu, Lijie Mao
Summary: This study evaluated the efficiency and influencing factors of surgical ward nursing and found that overall nursing service efficiency was low, limited by scale efficiency and pure technical efficiency. The study suggests using data envelopment analysis to optimize nursing human resource allocation and nursing performance allocation.
JOURNAL OF NURSING MANAGEMENT
(2022)
Article
Management
Chiang Kao
Summary: This study develops a model to calculate the maximum SBM efficiency for general network production systems, and applies it to a garment manufacturing company. The results show that the sewing operation contributes more to the system efficiency than the cutting operation does.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2024)
Article
Thermodynamics
Yongming Han, Xiaoyi Lou, Mingfei Feng, Zhiqiang Geng, Liangchao Chen, Weiying Ping, Gang Lu
Summary: The analysis and saving methods of building energy consumption are crucial, utilizing both static and dynamic models to enhance energy efficiency in buildings which is significant for global sustainable development.
Article
Environmental Studies
Xiuli Liu, Pibin Guo, Xiaohang Yue, Xiaoyan Qi, Shufeng Guo, Xijun Zhou
Summary: The study evaluates the metabolic efficiency of the Beijing-Tianjing-Hebei urban agglomeration from 2005 to 2017, with Tianjin showing the highest comprehensive and economic efficiency, and Beijing having the highest environmental efficiency. Technological progress has been the main driver for improving metabolic efficiency, with scale benefits gradually playing a role since 2011. The main factors contributing to metabolic inefficiency are inadequate GDP output and emission of metabolic pollutants.
Article
Green & Sustainable Science & Technology
Sedef E. Kara, Mustapha D. Ibrahim, Sahand Daneshvar
Summary: This study examines the efficiency and productivity of renewable energy sources in OECD countries, with bioenergy identified as the most efficient option. Countries should tailor their renewable energy portfolio to their strengths for improved efficiency.
Article
Thermodynamics
H. Wang, P. Zhou, Qunwei Wang
Article
Thermodynamics
H. Wang, B. W. Ang, Bin Su
Article
Economics
H. Wang, B. W. Ang, P. Zhou
Article
Energy & Fuels
H. Wang, D. Q. Zhou, P. Zhou, D. L. Zha
Article
Management
P. Zhou, B. W. Ang, H. Wang
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2012)
Article
Management
H. Wang, P. Zhou, Bai-Chen Xie, N. Zhang
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2019)
Article
Energy & Fuels
Bingquan Liu, Junxue Shi, Hui Wang, Xuelin Su, Peng Zhou
Article
Economics
H. Wang, B. W. Ang, Q. W. Wang, P. Zhou
Article
Economics
B. W. Ang, Bin Su, H. Wang
Article
Economics
B. W. Ang, H. Wang
Article
Economics
H. Wang, P. Zhou, D. Q. Zhou
Article
Economics
H. Wang, P. Zhou, D. Q. Zhou
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
