Energy最新文献

{"title":"Proposal and thermodynamic analysis of a novel oxy-methanol combustion gas turbine combined cycle with zero emission","authors":"Tuantuan Xin,&nbsp;Xikang Li,&nbsp;Wei Yang,&nbsp;Cheng Xu","doi":"10.1016/j.energy.2025.136857","DOIUrl":"10.1016/j.energy.2025.136857","url":null,"abstract":"<div><div>Green methanol, produced from renewable energy sources, holds substantial potential for power generation. To explore the thermodynamic performance of methanol as a power fuel with zero emission, a novel oxy-methanol combustion gas turbine combined cycle (GTCC) is proposed. Different from the conventional GTCC, the O₂, a byproduct in green methanol production, is utilized for methanol combustion and the mixture, mainly consisting of CO₂ and H₂O, is recycled as the working fluid instead of air. Thus, zero carbon emission can be realized as the high-concentration CO₂ is directly split from the cycle cold-end for the carbon capture and storage (CCS). Detailed energy and exergy analyses are conducted and the overall system thermodynamic performance is discussed under different operating conditions. Results demonstrate that the net efficiency of the basic system is 60.73 %, featuring an efficiency penalty of only 2.91 % points for CCS. Exergy analysis reveals that the exergy efficiency is 57.78 %, higher than that of the reference system without CCS (56.57 %) as CO₂ captured is also considered as a product. Furthermore, increasing the pressure ratio could effectively enhance the system efficiency. At the optimal pressure ratio of 50, the net energy/exergy efficiency further ascends to 61.94 %/58.85 %. The proposed concept might offer a science and technology foundation for developing efficient oxy-methanol combustion GTCC with zero carbon emission.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"330 ","pages":"Article 136857"},"PeriodicalIF":9.0,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating electricity transmission and distribution efficiency using Data Envelopment Analysis Forest with feature importance","authors":"Tianhao Yi ,&nbsp;Lisha Li ,&nbsp;Zhiyong Li ,&nbsp;Jiaxuan Zhang","doi":"10.1016/j.energy.2025.136580","DOIUrl":"10.1016/j.energy.2025.136580","url":null,"abstract":"<div><div>Data Envelopment Analysis (DEA), a non-parametric method, has been widely used to measure power grid efficiency, which is a crucial metric for measuring progress in energy development. However, efficiency analysis faces difficulties due to high dimensionality and data noise. To mitigate these challenges, the integration of standard DEA models into an ensemble Random Forest structure is proposed, resulting in a new model called DEA Forest for the evaluation of power grid sector performance. Simulation results indicate that this new model exhibits robust and discriminative performance across both low- and high-dimensional inputs and outputs. An empirical analysis of the performance of the Chinese power grid sector is also conducted. Its results demonstrate that DEA Forest can provide discriminative efficiency ranking results in high-dimensional features of power grid compared to other methods. Moreover, a novel feature importance measure is proposed to analyze the decision-making processes based on DEA, which can provide more discriminative importance values under multicollinearity. This measure maintains a ranking similarity of 91.86% with the original results after feature selection, compared to 77.89% achieved by the old method. It also displays key inputs and outputs that affect electricity transmission and distribution efficiency. The results of this study indicate that in the era of big data, regulators and scholars need to consider the impact of high-dimensional features and data noise on efficiency results in large-scale power grid development. When analyzing feature importance or conducting feature selection, it is also necessary to pay attention to the impact of feature correlation.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"330 ","pages":"Article 136580"},"PeriodicalIF":9.0,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the effectiveness of import duty to reduce carbon leakage under carbon-price uncertainty","authors":"Sriram Sankaranarayanan","doi":"10.1016/j.energy.2025.136609","DOIUrl":"10.1016/j.energy.2025.136609","url":null,"abstract":"<div><div>We model the behaviour of a profit-maximising producer in a region where carbon prices may be uncertain (possibly due to implementing emissions trading system (ETS)) or known deterministically (possibly due to a carbon tax). In particular, we analyse the propensity of the producer to shift a part of their operations offshore (carbon leakage) to avoid paying for emissions. Using a two-stage stochastic optimisation model, we show the striking difference in a producer’s long-term investment decisions in the presence and absence of carbon price uncertainty. When the producer knows the carbon price deterministically, she either invests in converting the existing domestic infrastructure to more sustainable ones or installs new capacity offshore, depending upon the magnitude of the carbon price, but never both. However, when the carbon price is uncertain, the producer could gain by simultaneously investing in domestic upgrades as well as an offshore plant, indicating guaranteed carbon leakage. While the behaviours could be different, we show that a carefully designed import duty could combat carbon leakage effectively, irrespective of the uncertainties. This, further indicates that, when used in combination with an import duty as a policy instrument, both carbon tax as well as ETS act as effective environmental policies.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"329 ","pages":"Article 136609"},"PeriodicalIF":9.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the impact of temperature on oil shale conversion via supercritical methanolysis: Experimentation, characterization and mechanism insight","authors":"Da Cui ,&nbsp;Jiawei Zhang ,&nbsp;Qing Wang ,&nbsp;Xuehua Zhang ,&nbsp;Moslem Fattahi ,&nbsp;Chunlei Wu ,&nbsp;Yixi Wu ,&nbsp;Bin Liu ,&nbsp;Jinghui Zhang","doi":"10.1016/j.energy.2025.136803","DOIUrl":"10.1016/j.energy.2025.136803","url":null,"abstract":"<div><div>In this study, supercritical methanolysis experiments were conducted for Chinese Beipiao (BP) and Jordanian El-Lajjun (EL) oil shales at various temperatures. The methanol-soluble portion (SP), insoluble residue (ISR), and gas were collected and analyzed, revealing the reaction mechanisms and temperature effects in oil shale supercritical methanolysis. The obtained results demonstrated that supercritical methanolysis of oil shale could achieve a mild conversion (&lt;400 °C). The presence of methanol significantly enhanced the SP yield, exceeding the shale oil yield from oil shale obtained from pyrolysis. Maximum SP yields of 5.33 % and 14.43 % for BP oil shale and EL oil shale, respectively, at 370 °C. The results showed that the primary components of the SPs were <em>n</em>-alkanes and fatty acid methyl esters (FAME). Additionally, a comprehensive characterization of the products obtained at various temperatures during supercritical methanolysis identified 11 possible chemical reactions. These results elucidated how temperature influences the molecular composition and structure of methanolysis products, revealed the reaction mechanism underlying oil shale's supercritical methanolysis, and verified the feasibility of producing liquid fuels through this process.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"329 ","pages":"Article 136803"},"PeriodicalIF":9.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of structure-material-gap for soft gaskets used in a refrigerator-freezer","authors":"Tianyang Zhao ,&nbsp;Guoqiang Liu ,&nbsp;Zhijie Zhai ,&nbsp;Guixiang He ,&nbsp;Gang Yan ,&nbsp;Peng Liu ,&nbsp;Juan Wang ,&nbsp;Changyong Wang","doi":"10.1016/j.energy.2025.136829","DOIUrl":"10.1016/j.energy.2025.136829","url":null,"abstract":"<div><div>As a key component connecting the door and cabinet in refrigerator-freezers, gaskets play a vital role in sealing and thermal insulation. Previous studies did not systematically research the factors about gasket optimizations. This study focuses on optimizing three single-factor of the gasket to reduce its heat load: structure, material, and gap. For each factor, two optimizations were proposed. Numerical simulations were conducted to evaluate the improvement of the optimized gasket in thermal insulation performance. The optimized effect of two structurally optimized gaskets is 34.89 % and 31.60 %. The optimized effect of two material optimized gaskets using foamed PVC and hollow microsphere PVC is 8.12 % and 9.11 %. The optimized effect of two optimized gaps is 3.18 % and 9.84 %. Heat transfer equations were then established to reveal the five inherent parameters contributing to the reduction in heat load of the gasket. The study further proposed dual-factor and triple-factor combined optimizations, analyzing the effects of structure-material, structure-gap, material-gap, and structure-material-gap optimizations using the heat transfer equation. Numerical simulation results showed the average optimized effect of structure-material was 39.58 %, structure-gap was 38.67 %, material-gap was 14.37 %, and structure-material-gap was 44.31 %. The study explained the attenuation characteristics of the effects of the various combined optimizations from the above numerical simulation results. Finally, in experiments of the reduction in energy consumption of the refrigerator-freezer. The effects of structural, material and structure-material optimization are 3.06 %, 1.61 %, and 3.56 %. The study aims to reduce energy consumption of refrigerator-freezers via gasket optimization to promote energy conservation and emission reduction in the refrigerator-freezer industry, with the optimizations expected to significantly reduce carbon emissions by 14.22 million tons per year.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"330 ","pages":"Article 136829"},"PeriodicalIF":9.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electric bus charging scheduling on hybrid wireless charging network: A multi-factor integrated optimization strategy","authors":"Taolue Chen ,&nbsp;Chao Sun ,&nbsp;Xiao Liang ,&nbsp;Mingyang Li ,&nbsp;Jinjun Tang","doi":"10.1016/j.energy.2025.136499","DOIUrl":"10.1016/j.energy.2025.136499","url":null,"abstract":"<div><div>As a low-carbon and environment-friendly mode in public transportation, electric buses are favored by many public transport operators due to their lower operating costs. The study focuses on the charging scheduling problem of electric buses in a hybrid wireless charging network, aiming to enhance operational efficiency and reduce costs through optimized charging strategies. This problem is formulated as a mixed integer quadratically constrained programming model, which integrates various factors such as vehicle operation conditions, battery capacity, time-of-use electricity prices, and dynamic adjustment of charging power, with the objective of minimizing the total operating costs of the bus system. To reduce computational complexity, a data preprocessing scheme based on the decomposition and combination of multidimensional arrays is proposed, effectively reducing the time complexity and memory usage of the calculations. In terms of the solution algorithm, the McCormick Envelope linear relaxation method is employed to relax the model, and an adaptive large neighborhood search heuristic algorithm is combined to further enhance computational efficiency. Benchmark instances generated based on real bus route data from Shenzhen City were used to validate the effectiveness of the model through numerical experiments. The results indicate that the optimized charging scheduling strategy can significantly reduce the total operating costs of electric buses: after optimizing the fleet size, the average operating cost per trip decreased by 34.92%. Compared with using a 300 kWh battery, employing a smaller 100 kWh battery reduced the average operating cost per trip by 19.03%. In addition, the study conducted a secondary optimization of charging power and duration, which further optimized the construction of the charging infrastructure. Through multi-factor sensitivity analysis, optimization recommendations were provided for public transport operators. These comprehensive optimizations can reduce energy consumption and operating costs, offering significant theoretical and practical value for the green transformation of urban public transportation systems.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"329 ","pages":"Article 136499"},"PeriodicalIF":9.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How to optimally design industrial high-temperature heat pump for multiple objectives and working conditions?","authors":"Shengming Dong,&nbsp;Pengli Hu,&nbsp;Chen Zhang,&nbsp;Xiaowei Hu,&nbsp;Wenhui Zhuang,&nbsp;Dongxia Wu","doi":"10.1016/j.energy.2025.136830","DOIUrl":"10.1016/j.energy.2025.136830","url":null,"abstract":"<div><div>High-temperature heat pump has aroused widespread attention for its superiority in industrial low-carbon heating. However, the inevitable fluctuation of the working conditions can significantly deteriorate its actual performance. Therefore, how to comprehensively consider multiple conditions in the design process holds great practical significance. Herein, a bi-level programming model involving multiple objectives and working conditions is proposed, within which, the lower level is based on a hybrid model resolved by the Geyser-inspired algorithm to obtain the performances of specified heat pump configuration under different conditions, and the upper level generates and ranks different configurations by the improved non-dominated sorting genetic algorithm. In the exemplary case with the payback period, carbon emission reduction being the objective function and three different conditions, an average 17.5 % increment of carbon emission reduction can be achieved by the proposed method than the conventional one under the same payback period, validating its necessity and superiority. The mean ratios of the evaporator to condenser area involved in the Pareto fronts are 0.81, 0.76 and 0.73, indicating that priority should be given to increasing the condenser area for better adaptability of variable conditions. Finally, the optimal configuration with compressor displacement, evaporator and condenser area to be 1959 m³/h, 154.5 m² and 232.0 m² is established.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"329 ","pages":"Article 136830"},"PeriodicalIF":9.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the applicability of a horizontal well in compressed air energy storage in aquifer","authors":"Tianjiao Bi ,&nbsp;Bin Zhang ,&nbsp;Wei Chen ,&nbsp;Jian Li ,&nbsp;Zhiwei Yang ,&nbsp;Yupeng Wang ,&nbsp;Xuelin Zhang ,&nbsp;Xiaodai Xue","doi":"10.1016/j.energy.2025.136778","DOIUrl":"10.1016/j.energy.2025.136778","url":null,"abstract":"<div><div>Depleted hydrocarbon reservoir is a suitable gas storage system for compressed air energy storage in aquifer (CAESA), presenting a solution for managing the variability of renewable energy. Utilizing an existing horizontal well instead of drilling a new one is key to reducing CAESA costs, though research on horizontal well applications in CAESA is limited. This study models CAESA with a horizontal well and analyzes its operational characteristics, including air volume fraction, pressure distribution, temporal pressure variation, and energy recovery efficiency, comparing it to a vertical well over a year. The air volume fraction and pressure in the CAESA with horizontal well are similar to those in the CAESA with vertical well, except near the well. During initial gas bubble formation, horizontal well pressure trends align with that of the vertical well. In daily operations, the horizontal well averages 10.24 MPa pressure versus 10.15 MPa for the vertical well. The horizontal well achieves a stable input exergy rate of 780 kW and an output of 774 kW, resulting in about 99.2 % energy recovery efficiency, compared to 99.5 % for the vertical well. Overall, CAESA with a horizontal well shows comparable operational characteristics to a vertical well, demonstrating its substantial applicability.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"329 ","pages":"Article 136778"},"PeriodicalIF":9.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An insight into the effects of injection pressure and nozzle dimension on combustion characteristics and pollutant formation of ammonia/diesel dual-fuel engines","authors":"Cheng Shi ,&nbsp;Tengfei Cheng ,&nbsp;Ruiling Duan ,&nbsp;Fuquan Nie ,&nbsp;Xiaodong Yan ,&nbsp;Xiyu Yang","doi":"10.1016/j.energy.2025.136784","DOIUrl":"10.1016/j.energy.2025.136784","url":null,"abstract":"<div><div>The ammonia/diesel dual-fuel engine is affected by the characteristics of premixed ammonia, and the flame propagation rate is slow, resulting in combustion deterioration and high pollutant emissions. To solve these problems, this study constructed a three-dimensional numerical model of the ammonia/diesel dual-fuel engine and completed the verification based on the experimental data. The combustion and pollutant emissions of the mixtures in the combustion chamber were simulated to analyze the synergistic effects of diesel injection pressure (DIP) and orifice diameter (DOD) at an ammonia blending ratio of 40 %. The results demonstrate that an increase in DIP and DOD promotes a rise in diesel mass flow rate, accompanied by enhanced jet turbulence and axial diffusion. Under the condition of a small orifice diameter, the application of lower DIP leads to prominent diffusion combustion, which prolongs the ignition delay and combustion duration. The increase in DOD or DIP accelerates the multi-point ignition effect, generating more OH radicals and promoting the reaction NH₃+OH↔H₂O + NH₂. This leads to higher indicated thermal efficiency (ITE) and indicated mean effective pressure (IMEP). Under large orifice diameters, the application of higher DIP enhances combustion efficiency and reduces emissions of pollutants other than NO_x. Due to the fixed fuel NO_x, larger parameter combinations generate more local hotspots, thereby increasing thermal NO emissions. Excessively concentrated combustion can cause the maximum pressure rise rate to exceed the allowable value of 1 MPa/°CA, affecting the stable operation of the engine. Therefore, the combination schemes with excessively large DOD and DIP should be eliminated. The best ITE and IMEP are obtained under the (0.31 mm,80 MPa) scheme, which are 40.91 % and 1.04 MPa, respectively. The emissions of unburned NH₃, CO, HC, and Soot show opposite trends to NO_x. The (0.26 mm, 120 MPa) is the best solution. Compared with the optimal engine power scheme, it is acceptable to sacrifice a minor amount of ITE and IMEP in exchange for substantial improvements in emission cleanliness. The ITE and IMEP of the optimized scheme are 3.04 % higher than those of the original diesel injection configuration. The unburned NH₃ emissions are reduced by 99.1 %, leaving only 0.01 g/kW·h, and the total greenhouse gas emissions decrease by 262.4 g/kW·h, a 40.5 % reduction.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"329 ","pages":"Article 136784"},"PeriodicalIF":9.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characteristics of cement-based thermo-concretes containing capric acid impregnated hemp for thermal energy storage and sound isolation in buildings","authors":"Osman Gencel ,&nbsp;Onur Güler ,&nbsp;Abid Ustaoğlu ,&nbsp;Ertuğrul Erdoğmuş ,&nbsp;Ahmet Sarı ,&nbsp;Gökhan Hekimoğlu ,&nbsp;Yalçın Boztoprak ,&nbsp;Serkan Subaşı","doi":"10.1016/j.energy.2025.136837","DOIUrl":"10.1016/j.energy.2025.136837","url":null,"abstract":"<div><div>Enhancing the lightweight structure, insulation, and thermal storage capacity of concrete is critical for energy efficiency and environmental impact reduction. The innovative application of using waste hemp shives as a phase change material (PCM) carrier in cementitious composites was performed in this study to enhance sustainable construction practices. Although previous studies have incorporated lightweight aggregates and PCMs, challenges such as PCM leakage and the reliance on synthetic materials have limited their effectiveness. This study utilized waste hemp shives as a natural porous support for capric acid (CA) PCM in diatomite-based lightweight concrete, offering an eco-friendly and leakage-resistant solution with improved thermal and acoustic performance. No leakage was observed in shape-stabilized hemp/CA composites with 45 wt% CA. The melting and solidification temperatures were determined as 30.6 °C and 28.7 °C, with corresponding enthalpy values of 80.9 and 80.8 J/g, respectively. Concrete composites containing hemp/PCM reduced indoor temperatures by up to 4 °C compared to control samples. Moreover, composites with 30 % hemp/PCM content achieved sound absorption coefficients up to 0.6 and transmission loss values exceeding 24 dB, demonstrating their dual functionality for thermal energy conservation and acoustic comfort in building applications.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"329 ","pages":"Article 136837"},"PeriodicalIF":9.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}