Powder Technology最新文献

Activated carbon/superporous hydrogel composite-based polymer desiccants for capturing water vapor from humid air

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-31 DOI: 10.1016/j.powtec.2025.121001

Mubinul Islam , Hemant Mittal , Ali Al Alili , Saeed Alhassan , Vaneet Kumar , Md Islam

{"title":"Activated carbon/superporous hydrogel composite-based polymer desiccants for capturing water vapor from humid air","authors":"Mubinul Islam , Hemant Mittal , Ali Al Alili , Saeed Alhassan , Vaneet Kumar , Md Islam","doi":"10.1016/j.powtec.2025.121001","DOIUrl":"10.1016/j.powtec.2025.121001","url":null,"abstract":"<div><div>The removal of water vapor from the atmosphere is crucial across various industries, and high-performance porous solid desiccants can enhance sustainable practices. Traditional desiccants like silica gel have limitations, including low adsorption capacity and high regeneration temperatures. This study introduces superporous hydrogel (SPH) composites made from acrylic acid and dimethyl acrylamide, with porous activated carbon from sunflower seed shells as fillers. We characterized the desiccants using techniques such as FTIR, XRD, SEM, and TGA. The water vapor adsorption isotherm for both SPH and the composite displayed type-III isotherms, indicating capillary condensation as the main adsorption mechanism. The composite SPH achieved a maximum water vapor adsorption capacity of 0.908 g<sub>wat</sub>/g<sub>ads</sub> at 0.9 relative pressure and 25 °C, surpassing the pristine SPH by 19 %. Durability tests showed the composite retained 93 % efficiency after ten cycles, compared to 86 % for the pristine SPH, demonstrating its enhanced reusability.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 121001"},"PeriodicalIF":4.5,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compaction behavior and residual height ratio of crushed coal gangue under varying support conditions: Experimental analysis and model comparison

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-30 DOI: 10.1016/j.powtec.2025.120970

Changxiang Wang , Weiwei Cao , Peng Kong , Qinghai Li , Wenqiang Mu , Yingdi Yang , Ning Jiang

{"title":"Compaction behavior and residual height ratio of crushed coal gangue under varying support conditions: Experimental analysis and model comparison","authors":"Changxiang Wang , Weiwei Cao , Peng Kong , Qinghai Li , Wenqiang Mu , Yingdi Yang , Ning Jiang","doi":"10.1016/j.powtec.2025.120970","DOIUrl":"10.1016/j.powtec.2025.120970","url":null,"abstract":"<div><div>Resource utilization of coal gangue and safe recovery of residual coal pillars are the key issues for the green and long-term development of coal mines. The purpose of this study is to explore the compaction characteristics of broken gangue under different supporting conditions and its filling application in goaf. Through the experimental observation and data analysis of the compaction process of broken gangue, the variation law of residual height and residual height ratio under different conditions was studied. The experimental findings demonstrate that the residual height ratio effectively captures the relationship between residual height and the high diameter ratio. In unsupported scenarios, a lower high diameter ratio corresponds to a more favorable stable configuration. Specifically, when this ratio falls below 0.4, the residual height ratio exhibits a substantial increase. Conversely, under supported conditions, the compaction of crushed gangue proceeds in a continuous manner, resulting in enhanced residual height and a notable improvement in the residual height ratio as can to 0.8. The comparative analysis of fitting outcomes reveals that the Terzaghi model exhibits superior aptitude in capturing the compressive deformation characteristics of crushed gangue across varying scenarios, as compared to the Salamon model. This research contribution not only strengthens the theoretical foundation but also offers valuable practical insights for the implementation of coal mine gangue partial filling techniques.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120970"},"PeriodicalIF":4.5,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Clean and high-value recycling approach for waste concrete powder: Mechano-chemical activation of pozzolanic activity

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-28 DOI: 10.1016/j.powtec.2025.120988

Qiang Gao , Xi-guang Li , Xiao-dong Shi , Xin-long Li , Xian-jun Lyu , Xiang-nan Zhu , Yang-guang Ren

{"title":"Clean and high-value recycling approach for waste concrete powder: Mechano-chemical activation of pozzolanic activity","authors":"Qiang Gao , Xi-guang Li , Xiao-dong Shi , Xin-long Li , Xian-jun Lyu , Xiang-nan Zhu , Yang-guang Ren","doi":"10.1016/j.powtec.2025.120988","DOIUrl":"10.1016/j.powtec.2025.120988","url":null,"abstract":"<div><div>With the precipitous advancement of the construction industry, the resource utilization of construction waste has attracted extensive attention worldwide. In this study, the effect of mechano-chemical coupling activation on the activation of recycled concrete powder (RCP) pozzolanic activity was explored. Firstly, the effect of mechanical activation on the particle size characteristics and specific surface area (SSA) of RCP was analyzed. The D<sub>50</sub> of RCP attains 7.03 μm and the SSA reaches 1429.8 m<sup>2</sup>/kg after 120 min of grinding, indicating that mechanical activation enhanced the reactivity of RCP. Subsequently, the effects of mechanical activation time and alkali activation on the macroscopic properties of recycled concrete powder-based geopolymer (RCBG) were analyzed to indirectly determine the pozzolanic reactivity of RCP. The maximum compressive strength of RCBG can reach 4.475 MPa at 28 d when the RCP is milled for 120 min and the addition amounts of both CaO and CaSO₄ are 5 %. The pozzolanic activity of RCP is positively correlated with the mechanical milling time, and the excessive addition of alkali activators is detrimental to the development of compressive strength. Conclusively, X-ray diffraction (XRD), thermogravimetric-differential thermogravimetric (TG-DTG), and high-resolution scanning electron microscopy-energy spectroscopy (SEM-EDS) were used to analyze the hydration mechanism of RCBG. XRD and TG analyses show that the presence of CaO and CaSO<sub>4</sub> is favorable to increase the generation amount of hydration products (C-(A)-S-H gel and ettringite), and dense microstructures are formed, thus improving the strength of RCBG.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120988"},"PeriodicalIF":4.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electro-mechanical insights into the mixing of conductive and non-conductive sands at an interface

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-28 DOI: 10.1016/j.powtec.2025.120991

Chao Zhang , Sadaf Maramizonouz , Changrong Yang , David Milledge , Roger Lewis , Sadegh Nadimi

{"title":"Electro-mechanical insights into the mixing of conductive and non-conductive sands at an interface","authors":"Chao Zhang , Sadaf Maramizonouz , Changrong Yang , David Milledge , Roger Lewis , Sadegh Nadimi","doi":"10.1016/j.powtec.2025.120991","DOIUrl":"10.1016/j.powtec.2025.120991","url":null,"abstract":"<div><div>This paper investigates the electrical behaviour of an electrically conductive sand particle when mixed with non-conductive silica sand, commonly used in the railway industry. Laboratory tests and numerical simulations are conducted to assess the effect of mixing on the electrical conduction properties at the metal-to-metal interface under mechanical loading. Results from compression tests demonstrate that mixing with even 5 % mass of conductive particles can significantly reduce electrical resistance at the interface; however, the decrease in electrical resistance gradually slows down when the mixing ratio of conductive particles exceeds 10 %. Discrete element modelling of high pressure torsion tests – enhanced with a newly proposed electro-mechanical contact model – reveal that fine conductive particles are more effective than coarse particles in reducing interfacial electrical resistance at equal mixing ratios. A heatmap is proposed to estimate the percentage of conductive particles required to bring the resistance of the interface below the critical threshold of 10 Ω for track circuit, which links the resistivity of various conductive particles with their required mixing ratio.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120991"},"PeriodicalIF":4.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computational fluid dynamics simulation of the hydrodynamic and particle suspension performance of a novel channel impeller

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-28 DOI: 10.1016/j.powtec.2025.120994

Mingyu Chen , Xin Huang , Richard Lakerveld , Mingpu Yuan , Yifu Zhang , Shyam Lamichhane , Qiyun Luo , Jinshen Ren , Ting Wang , Na Wang , Hongxun Hao

{"title":"Computational fluid dynamics simulation of the hydrodynamic and particle suspension performance of a novel channel impeller","authors":"Mingyu Chen , Xin Huang , Richard Lakerveld , Mingpu Yuan , Yifu Zhang , Shyam Lamichhane , Qiyun Luo , Jinshen Ren , Ting Wang , Na Wang , Hongxun Hao","doi":"10.1016/j.powtec.2025.120994","DOIUrl":"10.1016/j.powtec.2025.120994","url":null,"abstract":"<div><div>Impeller optimization is essential to improve the performance of stirred tanks, which are widely used in the chemical industry. In this study, a novel channel impeller was developed by eliminating blades from conventional impellers to optimize mixing efficiency. By employing Eulerian-Eulerian model and the standard k-ε turbulence model, the hydrodynamic and particle suspension performance of this novel impeller were compared with traditional impellers (pitched blade impeller, propeller, and Rushton). The results reveal that the novel impeller significantly reduces power consumption and power number, while generating a flow pattern characterized by strong radial flows and a complex multi-peak axial velocity profile. Moreover, regions of high turbulent kinetic energy and turbulent energy dissipation rate are more concentrated and symmetrical, thereby improving local mixing efficiency. Notably, the novel impeller achieves a more uniform pressure and stress distribution, offering potentially better fluid dynamics performance and greater durability in practical applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120994"},"PeriodicalIF":4.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of mean residence time in novel U-type fluidized bed reactor: Model prediction and experimental validation

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-28 DOI: 10.1016/j.powtec.2025.120992

Zhidong Tang , Shaokai Cheng , Peng Gao , Yuexin Han , Yanjun Li

{"title":"Study of mean residence time in novel U-type fluidized bed reactor: Model prediction and experimental validation","authors":"Zhidong Tang , Shaokai Cheng , Peng Gao , Yuexin Han , Yanjun Li","doi":"10.1016/j.powtec.2025.120992","DOIUrl":"10.1016/j.powtec.2025.120992","url":null,"abstract":"<div><div>Fluidized bed roasting exhibits excellent application prospects for processing refractory iron ores, with the residence time of hematite powders in reactor being a critical factor that affects roasted product quality. In this study, a model for the mean residence time of materials in a U-type reactor was established and validated through cold experiment system. The effects of fluidization chamber airflow, supply chamber airflow and delivery rate were explored with different particle size of hematite. The results showed that the mean residence time of hematite powders predicted by the model and obtained from the experimental data decreased gradually with the increase of the fluidization chamber airflow, supply chamber airflow, and delivery rate. 70 groups of mean residence times for different working conditions matched very well with the model-predicted, with an error margin of less than ±8.58 %, which confirmed the validity of the proposed model. This model holds significant importance for regulating and optimizing the operational parameters of hematite during suspension roasting.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120992"},"PeriodicalIF":4.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CFD-DEM analysis of gas-solid-solid three-phase flow in a moving bed pyrolysis reactor

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-27 DOI: 10.1016/j.powtec.2025.120948

Tong Zhang , Dongsheng Jiao , Xiaoyu Wang, Liangzhi Xia

{"title":"CFD-DEM analysis of gas-solid-solid three-phase flow in a moving bed pyrolysis reactor","authors":"Tong Zhang , Dongsheng Jiao , Xiaoyu Wang, Liangzhi Xia","doi":"10.1016/j.powtec.2025.120948","DOIUrl":"10.1016/j.powtec.2025.120948","url":null,"abstract":"<div><div>Pyrolysis is an effective method for the clean and resourceful utilization of oil sludge. A solid heat carrier moving bed pyrolysis process can efficiently pyrolyze oil sludge, and the introduction of carrier gas can reduce secondary cracking, resulting in high-quality pyrolysis products. The flow and mixing uniformity of oil sludge particles with the heat carriers, as well as the uniformity of carrier gas flow, directly impact the efficiency of oil sludge particle pyrolysis. In this study, the flow and mixing characteristics of gas-solid-solid three-phase fluid in a cold moving bed were investigated using the coupled discrete element method (DEM) with computational fluid dynamics (CFD) based on the Euler-Euler-Lagrange multiphase flow model. The results indicated that a higher the mass ratio of heat carriers to oil sludge particles leads to better mixing uniformity of the mixture, while a lower mass ratio results in better flow uniformity of the particles. An increase in the volume of carrier gas initially improves the uniformity of particle flow but subsequently deteriorates it; conversely, a smaller volume of carrier gas enhances the mixing uniformity of the mixture. A smaller mass ratio of the heat carriers and a smaller volume of carrier gas lead to a more uniform distribution of carrier gas flow within the moving bed. The optimal conditions were found to be a mass ratio of oil sludge particles to heat carriers of 1:1 and a carrier gas flow rate of 7.5 L/min, which yielded the best flow mixing effect for oil sludge particles.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120948"},"PeriodicalIF":4.5,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated dynamic image analysis for particle size and shape classification in three dimensions

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-27 DOI: 10.1016/j.powtec.2025.120973

Sadegh Nadimi , Vasileios Angelidakis , Sadaf Maramizonouz , Chao Zhang

{"title":"Automated dynamic image analysis for particle size and shape classification in three dimensions","authors":"Sadegh Nadimi , Vasileios Angelidakis , Sadaf Maramizonouz , Chao Zhang","doi":"10.1016/j.powtec.2025.120973","DOIUrl":"10.1016/j.powtec.2025.120973","url":null,"abstract":"<div><div>We introduce OCULAR, an innovative hardware and software solution for three-dimensional dynamic image analysis of micron-sized particles. Current state-of-the art instruments for dynamic image analysis are largely limited to two-dimensional imaging. However, extensive literature has demonstrated that relying on a single two-dimensional projection for particle characterisation can lead to inaccuracies in many applications. Existing three-dimensional imaging technologies, such as computed tomography, laser scanning, and orthophotography, are limited to static objects. These methods are often not statistically representative and come with significant post-processing requirements, as well as the need for specialised imaging and computing resources. OCULAR addresses these challenges by providing a cost-effective solution for imaging continuous particle streams using a synchronised array of optical cameras. Particle shape characterisation is achieved through the reconstruction of their three-dimensional surfaces. This paper details the OCULAR methodology, evaluates its repeatability, and compares its results against X-ray micro-computed tomography, highlighting its potential for efficient and reliable particle analysis.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120973"},"PeriodicalIF":4.5,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal and separation of iron and carbon from kaolin: A review

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-26 DOI: 10.1016/j.powtec.2025.120939

Xiubin Wang , Yinan Xie , Qian Wang , Hongliang Shang , Zhicheng Hu , Jiangang Ku , Zhengchang Shen

{"title":"Removal and separation of iron and carbon from kaolin: A review","authors":"Xiubin Wang , Yinan Xie , Qian Wang , Hongliang Shang , Zhicheng Hu , Jiangang Ku , Zhengchang Shen","doi":"10.1016/j.powtec.2025.120939","DOIUrl":"10.1016/j.powtec.2025.120939","url":null,"abstract":"<div><div>Kaolin, a versatile material, is widely utilized owing to its distinctive mineralogical characteristics, mineral morphology, and chemical and physical properties. Whiteness, a critical factor in determining the commercial value of kaolin, is significantly influenced by its impurities. Consequently, impurity removal from kaolin has emerged as a primary research focus. These studies have concentrated on enhancing kaolin’s whiteness by optimizing critical parameters and employing innovative separation techniques. On this basis, this article reviews various methods for removing and separating iron (free and structural) and carbon impurities from kaolin, detailing the technical principles, optimizing parameters, and elucidating the mechanistic features of different beneficiation methods.In addition, this paper discusses the merits and limitations of these methods and proposes potential future research directions. This paper aims to guide the selection and development of strategies for kaolin purification and the decontamination of other clay minerals.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120939"},"PeriodicalIF":4.5,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Abrasive breakage characteristics and prediction in abrasive water jets within nozzle internals

IF 4.5 2区工程技术

Powder Technology Pub Date : 2025-03-26 DOI: 10.1016/j.powtec.2025.120971

Jiawei Cui , Wenchuan Liu , Jiren Tang , Zhuoya Zhang , Yiyu Lu , Xin Yan , Ke Chen , Juan Zhang

{"title":"Abrasive breakage characteristics and prediction in abrasive water jets within nozzle internals","authors":"Jiawei Cui , Wenchuan Liu , Jiren Tang , Zhuoya Zhang , Yiyu Lu , Xin Yan , Ke Chen , Juan Zhang","doi":"10.1016/j.powtec.2025.120971","DOIUrl":"10.1016/j.powtec.2025.120971","url":null,"abstract":"<div><div>Abrasive water jets cutting is widely utilized in various mechanical cutting industries, with abrasive recycling gaining significant attention due to the high costs associated with abrasives. Understanding the breakage characteristics of abrasives and accurately predicting abrasive breakage are essential for improving the efficiency of abrasive recycling. This study observed abrasive breakage characteristics before impact through experiments and proposed a Split Hopkinson Pressure Bar (SHPB)-assisted numerical model to predict abrasive breakage characteristics. Experimental results revealed a 14.1 % reduction in abrasive particle size without changes in the distribution function. The breakage resulted in smoother and more elongated particles and the model successfully replicated realistic abrasive size distribution for abrasive collision and subsequent breakages. Numerical findings indicated that abrasive collisions occur in both the convergent and tangential sections of the nozzle. Significantly, it has been observed that the majority of breakage occurs within the nozzle's tangential section, and this is governed by both collision dynamics and high-velocity flow. The findings of this study offer a foundational basis for the recycling of abrasive and the conceptualization of nozzle designs.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"458 ","pages":"Article 120971"},"PeriodicalIF":4.5,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0