IEEE Transactions on Dielectrics and Electrical Insulation最新文献

{"title":"Design of Honeycomb-Inspired Metamaterial Skeleton for Constructing Highly Thermally Conductive Epoxy Composite","authors":"Zhengyong Huang;Ru Cai;Weiwei Xu;Yingfan Zhang;Run He;Yusheng Wang;Xing Xiang;Jian Li","doi":"10.1109/TDEI.2026.3654028","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3654028","url":null,"abstract":"High thermal conductivity (TC) electrical epoxy resin holds considerable appeal for engineering applications such as high-power electronic converters, high-voltage transmission, and aerospace. Adding inorganic high thermal conductivity fillers is a traditional method to improve TC. However, excessive filler addition significantly increases raw material viscosity, complicates processing, and introduces defects, revealing the limitation that material properties become overly dependent on composition control. Metamaterials, with their artificially designed structural characteristics, can break through the performance limitations of traditional materials that rely on component control. Therefore, to address the aforementioned limitations, this study applies metamaterials to composite material design. With inspiration from honeycomb, we architect a 3-D honeycomb metamaterial skeleton via 3-D printing, enabling oriented arrangement of hexagonal boron nitride (hBN) flakes within the metamaterial skeleton to yield a composite resin featuring an oriented metamaterial structure. Thus, a macroscopic skeleton network and a microscopic filler orientation are constructed to form a cross-dimensional continuous heat conduction path at a low filler content, significantly enhancing the TC at a low filler amount. Characterization confirms that hBN is highly oriented within the framework. Benefiting from the oriented metamaterial structure, the composites exhibit excellent TC and stability at low filler loadings. At the loading of 20-wt% hBN within the skeleton, the in-plane (IP) TC of the structured composites is 1.628 W m<inline-formula> <tex-math>${}^{-{1}}$ </tex-math></inline-formula> K<inline-formula> <tex-math>${}^{-{1}}$ </tex-math></inline-formula>, substantially exceeding both pure resin and control specimens (20 wt% loading, full coverage 3-D printing on every layer, no skeletal structure). The surface temperature measurement demonstrates that structured materials have superior thermal management applications with high heat absorption and dissipation rates compared to pure resin and the control specimens. Thermogravimetric analysis and dynamic thermal mechanical analysis indicate that the composites have excellent heat resistance and thermal stability. This study demonstrates that the strategy of constructing oriented metamaterial skeleton composite structures via 3-D printing to enhance TC under low filler loading offers a highly promising approach for developing high-performance thermally conductive materials.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3342-3348"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Advanced Detection Method for Assessing Aging State of Composite Insulators Under Pollution Cover","authors":"Yihan Fan;Yujun Guo;Yang Liu;Yuan Ou;Song Xiao;Xueqin Zhang;Guangning Wu","doi":"10.1109/TDEI.2026.3719608","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3719608","url":null,"abstract":"Ultrahigh voltage direct current (UHVDC) converter stations are crucial components of future power systems. However, composite post insulators, which are essential to the functionality of those stations, are susceptible to issues such as contamination deposition and aging due to exposure to ultraviolet radiation and atmospheric pollution. These problems can lead to flashover, reduced hydrophobicity, increased leakage current (LC), and pose operational risks. This article utilizes hyperspectral imaging (HSI) technology to detect insulator aging under polluted conditions. By analyzing the spectral similarities of insulators before and after cleaning, a spectral difference model is developed, extracting 113 characteristic bands indicative of aging. To reduce complexity, principal component analysis (PCA) is applied for dimensionality reduction, with PC1 (96.54% contribution) used as the dataset. The least squares support vector machine (LSSVM) algorithm, adapted for large-scale data processing, is employed as the classification model and optimized using improved Harris hawks optimization (IHHO), which identifies optimal hyperparameters (<inline-formula> <tex-math>${C} =257.002$ </tex-math></inline-formula>, <inline-formula> <tex-math>${g} = 0.141$ </tex-math></inline-formula>). The performance of the PCA-IHHO-LSSVM model is evaluated against five other classification algorithms, showing the best accuracy (98.07%) and computation time (1.935 s). The model is then used for visual assessment of insulator aging states, contributing to the identification of operational risks and ensuring the safe and stable transmission of energy in UHVDC converter stations.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3891-3900"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Space Charge Characteristic of Silicone Elastomer Used in SiC Device Under High Temperature up to 200 °C","authors":"Jinqiang Zhang;Xuebao Li;Yujie Liao;Yumeng Cai;Zezhong Sun;Peng Sun;Zhaocheng Liu;Zhibin Zhao","doi":"10.1109/TDEI.2025.3636107","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3636107","url":null,"abstract":"In order to study the space charge characteristics of silicone elastomers at high temperatures, a high-temperature pulse electro-acoustic (PEA) space charge characteristic measurement system with a temperature range of room temperature (<inline-formula> <tex-math>$25~^{circ }$ </tex-math></inline-formula>C)–<inline-formula> <tex-math>$200~^{circ }$ </tex-math></inline-formula>C was developed in this article. The system developed in this article can meet the temperature control and measurement requirements through actual temperature measurement and calibration. Through this system, this article studies the space charge characteristics and short-circuit characteristics of silicone elastomers under different polarity dc voltages in the range of <inline-formula> <tex-math>$25~^{circ }$ </tex-math></inline-formula>C–<inline-formula> <tex-math>$200~^{circ }$ </tex-math></inline-formula>C. With the increase of temperature, the charge accumulation depth first increases and then decreases, and the charge accumulation amount first increases and then decreases. The migration rate of negative polarity charges is greater than that of positive polarity charges. The trap characteristics of silicone elastomers at different temperatures are analyzed by charge dissipation characteristics. At lower temperatures, the deep trap density is greater than the shallow trap density, whether it is electron traps or hole traps. When it is greater than a certain temperature, the shallow trap density is greater than the deep trap density. Temperature affects charge generation and charge migration. At low temperatures, the charge injection amount increases and becomes the dominant factor. When the temperature increases, the charge mobility increases and becomes the dominant factor, so the charge accumulation amount and trap density both increase and then decrease with temperature.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3244-3252"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Droplet Motion Characteristics on the Surface of Silicone Rubber Sample Based on Ellipsoidal-Notch Droplet Model","authors":"Jianqiao Ma;Caiya Chen;Shuyao Zhang;Xilai You;Ruiqian Zhang","doi":"10.1109/TDEI.2026.3707521","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3707521","url":null,"abstract":"The morphology of water droplets on silicone rubber insulators plays a critical role in local electric-field distortion and flashover initiation. Flashover tests on smooth and rough specimens show that larger droplets exhibit stronger stretching, faster contact-angle reduction, and lower flashover voltage under increasing voltage, with these effects being more pronounced on rough surfaces. An inversion method for droplet geometric parameters was developed based on the ellipsoidal-notch model, and a coupled electric-field–two-phase-flow model was established accordingly. The results reveal that increasing droplet volume enhances the maximum electric field on the droplet surface, and that the ellipsoidal-notch model more accurately reproduces the experimentally observed symmetric stretching and convergence toward the droplet center. The evolution trends of the normalized stretching ratio <inline-formula> <tex-math>$lambda $ </tex-math></inline-formula>(t) in simulations agree well with experiments, while deviations on rough surfaces mainly arise from contact-line pinning and transient wetting behavior. The study further demonstrates that electric-field-induced droplet stretching acts as an important flashover risk-amplification mechanism by significantly enhancing local electric fields even on hydrophobic surfaces. These findings provide a physical basis for assessing early-stage wet-flashover risk in silicone rubber insulators.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3140-3150"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Electrode Material on Transient Current and Conduction Mechanisms in Oil Impregnated Pressboard Insulation","authors":"Fella Salhi;Abdeslem Beldjilali;Nadia Saidi-Amroun","doi":"10.1109/TDEI.2026.3723362","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3723362","url":null,"abstract":"The conduction behavior in oil-impregnated pressboard insulation has been extensively investigated under various conditions. However, few studies have addressed the potential influence of the electrode’s metallic nature and the fibrous structure of the pressboard material on the conduction process at the metal/pressboard interface. In this work, conduction currents are recorded using the polarization-depolarization current (PDC) technique, and a comparative analysis is performed on three metal/pressboard/metal (M/P/M) systems under different DC voltages. The results show an effect of the metal electrode on the transient current features. The conduction current is relatively high and shows slight variations depending on the type of metal electrode, following the same trend as the work function. This high current can be attributed to the moisture content of the pressboard, which may introduce ionic species (such as H⁺ and OH<inline-formula> <tex-math>${}^{-}$ </tex-math></inline-formula> generated by water dissociation within the cellulose structure of the pressboard) and induce charge accumulation at interfaces under an applied electric field. It is also highlighted that an increase in oil content in the M/P/M configuration with a steel electrode leads to space charge effects. Moreover, experimental data align with the thermionic emission mechanism at the M/P interface and the bulk-limited ionic conduction. This helps in estimating the height of the energy barrier at the M/P interface, which is found to be around 1 electron-Volt. In addition, the impact of both the metal electrode and oil content (in the impregnated pressboard) on the energy barrier height at the M/P contact is also observed.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3225-3233"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel Fractional-Order Equivalent Circuit Model for Characterizing Multifrequency Impedance Dynamics in Polymeric Insulation","authors":"Xize Dai;Claus Leth Bak;Jian Hao;Alberto Rumi;Ruijin Liao;Andrea Cavallini","doi":"10.1109/TDEI.2025.3649482","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3649482","url":null,"abstract":"This article presents a novel fractional-order equivalent circuit model (FO-ECM) for multifrequency impedance characterization of insulation systems in power assets. The proposed FO-ECM distinguishes itself by incorporating both a frequency-independent circuit module and adjustable frequency-dependent relaxation branches, making it a physics-based, modular approach capable of accurately representing complex impedance dynamics in polymeric insulation. The theory analysis, model construction, and analytical derivations of the FO-ECM are presented systematically. Eight study cases involving epoxy resin, polyester-imide resin, polyethylene terephthalate, and crosslinked polyethylene insulation are designed as a proof of concept to validate the model. The mapping relationship between dynamic mechanisms and the corresponding circuit model is analyzed. Additionally, the effectiveness and feasibility of the FO-ECM are validated by integrating varied measurement conditions, including voltage magnitudes (3, 100, and 140 V, rms), frequencies (1 mHz–1 MHz), temperatures (<inline-formula> <tex-math>$25~^{circ }$ </tex-math></inline-formula>C–<inline-formula> <tex-math>$150~^{circ }$ </tex-math></inline-formula>C above glass transition temperature), aging states (thermal aging), and instrument differences. Compared with the conventional <italic>RC</i> impedance and Cole-Cole models, the proposed FO-ECM enables physics-based reconstruction of multifrequency impedance responses and exhibits enhanced applicability to insulation systems in practical power equipment. Thus, this study establishes a reliable modeling foundation for polymeric insulation under multifrequency voltages.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3546-3555"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physicochemical Properties Changes Induced by Pulsed Discharge Occurring in CaCl2 Antifreeze","authors":"Yutai Li;Zhaoxia Peng;Zhongfeng Zhu;Yangyang Fu;Guolin Yang;Zhijin Zhang;Xinxin Wang;Xingliang Jiang","doi":"10.1109/TDEI.2026.3659432","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3659432","url":null,"abstract":"Motivated by the sustainable development goals, wind energy is significantly developed as an important renewable and clean energy source. Nevertheless, the problem of downtime due to icing of wind turbine blades in winter remains unsolved, resulting in a significant waste of wind resources. To address this issue, the author proposes a new shock wave de-icing method based on pulsed liquid discharge, and clarifies that micro-deformation and vibration of the blade layer are key factors. Ensuring that the liquid state and freezing point of the antifreeze solution are not affected by the discharge is key to extending the method to engineering applications. Typical organic antifreeze is evidenced to be unsuitable because it generates large amounts of gaseous products. In this article, the physiochemical properties changes in typical inorganic antifreeze (calcium chloride, CaCl<inline-formula> <tex-math>${}_{{2}}text {)}$ </tex-math></inline-formula> after the occurrence of pulsed discharges are investigated. It is found that pulsed discharges in CaCl₂ antifreeze generate essentially no gaseous products (i.e., no obvious change in the medium state). In addition, it is found that the freezing point of CaCl₂ antifreeze does not increase, while the hydrogen ion concentration (pH value) decreases slightly after discharge. The underlying factors contributing to these pH value fluctuations are elucidated. It is worth noting that the color of the solution changes significantly after discharge, which is due to the reaction and ablation of the electrode material producing some solid products. This study is expected to deepen the understanding of pulsed discharges affecting the physicochemical properties of typical inorganic antifreezes, thus providing important theoretical guidance and practical reference for the selection of antifreezes in this innovative de-icing method.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3484-3490"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Moisture on Dissolved Gas Diffusion in Vegetable-Based Insulating Oil","authors":"Kaifang Jiang;Zefeng Yang;Yun Liao;Jiazhao Lian;Wenlong Liao;Jie Yong;Wenfu Wei","doi":"10.1109/TDEI.2026.3707520","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3707520","url":null,"abstract":"The analysis of dissolved gas in oil is a widely employed technique for the early diagnosis of transformer faults, and moisture is a common contaminant in vegetable-based insulating oil that causes transformer faults. This study employs molecular dynamics simulations to investigate moisture effects (0–5 wt%) on diffusion behaviors of seven dissolved gases in camellia seed insulating oil. The research results revealed nonmonotonic gas diffusion coefficient variations with moisture content, showing initial inhibition followed by acceleration, and hydrogen exhibited the highest sensitivity. Then, the mechanism of water affecting gas diffusion was analyzed by fractional free volume (FFV), interaction energy distribution, and radial distribution function (RDF). Water molecules both compete for polar sites in vegetable-based insulating oil triglycerides and induce hydrocarbon chain aggregation via hydrophobic effects, collectively affecting gas diffusion. This research deepens our understanding of the diffusion behavior of dissolved gases in vegetable-based insulating oil transformers under humid conditions.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3113-3121"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of Nonuniform Thermal Aging in Transformer Oil-Paper Insulation Combining Cluster Reaction and Fractal Theory","authors":"Heyan Gong;Xingyi Lu;Jiefeng Liu;Yongqing Lin;Jing Luo;Jiacheng Zhou;Yiyi Zhang;Thomas Wu;Yuan Li;Daning Zhang","doi":"10.1109/TDEI.2026.3708626","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3708626","url":null,"abstract":"The aging of oil-paper insulation is one of the key factors affecting transformers’ service life. Existing studies analyzing the aging state of oil-paper insulation based on average activation energy have not accounted for the nonuniform aging of oil-paper insulation on the winding. Moreover, traditional charge models cannot reflect the microscopic mechanism behind this nonuniformly thermal aging phenomenon. Therefore, this article proposes a novel method to simulate the nonuniform aging along the axial direction of the winding. Then, cluster reaction and fractal theory are combined to explain the microscopic mechanism of this phenomenon. Meanwhile, based on the polarization and depolarization current (PDC) data of oil-paper insulation systems at different temperatures and the degree of polymerization (DP) of insulation paper at different heights, the distribution of cluster energy barriers for nonuniformly thermal aging oil-paper insulation materials are calculated. Laboratory validation using the 14 days and 21 days aging samples shows relative errors of only 2.32% and 3.59%, respectively. Finally, the correlations of the cluster energy barrier distribution and both the measured methanol (MeOH) concentration distribution in the laboratory and the DP distribution of the oil-paper insulation on the windings of field transformer after long-term operation are analyzed. This provides a novel approach for assessing the aging condition of oil-paper insulation in the transformer hotspot region.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3607-3616"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multispectral Detection and Diagnosis of Multisource Discharges on Epoxy Fiberglass Board","authors":"Hongtu Cheng;Lei Cai;Jie Feng;Yang Shen;Jialiang Huang;Zhi Fang","doi":"10.1109/TDEI.2025.3650543","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3650543","url":null,"abstract":"To enable the diagnosis of multisource partial discharge (PD) on the surface of epoxy fiberglass (EFR) boards, this study investigates optical PD signals and diagnostic methods associated with typical defects and their combinations. The electric field distribution for typical insulation defects is analyzed, and both emission spectroscopy measurements and PD experiments are performed. The results demonstrate that different PD modes exhibit distinct spectral characteristics. For needle, crack, and metal contamination defects, the detection limits using a full-band silicon photomultiplier (SiPM) are determined to be 64.37, 78.12, and 159 pC, respectively, with corresponding response coefficients of 450, 300, and 160 mV/pC. The SiPM response coefficient is found to vary with detection wavebands and PD modes. Multispectral analysis shows that although the 300–400-nm band accounts for the highest proportion across all discharge modes, the distribution characteristics of each wavelength band differ. A decision tree model is developed for discharge pattern diagnosis, achieving an accuracy of 95.09%.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3349-3357"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}