IEEE Transactions on Dielectrics and Electrical Insulation最新文献

{"title":"Evaluation of Oil-Paper Insulation Condition Based on Correlation Analysis of Isothermal Relaxation Current and Breakdown Characteristics","authors":"Haotian Shen;Jiandong Wu;Jiabei Zhu;Qiaohua Wang;Yi Yin;Feng Liu","doi":"10.1109/TDEI.2026.3709802","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3709802","url":null,"abstract":"This article analyzes the correlation between the isothermal relaxation current (IRC), dielectric strength, and physicochemical properties of oil-paper insulation during the aging process. It explores a calculation method and evaluation criteria for aging factors based on IRC response. The samples used for testing consist of insulating oil and insulating paper used in 500-kV power equipment, which were subjected to accelerated thermal aging at <inline-formula> <tex-math>$130~^{circ }$ </tex-math></inline-formula>C for 50 days. The results indicate that the relaxation current of the oil-paper insulation can be fit using a three-exponential model. During the aging process, the DC component I₀, the relaxation time constant <inline-formula> <tex-math>$tau _{{1}}$ </tex-math></inline-formula>, and the relaxation polarization intensity a_i all show a clear increasing trend. However, the relaxation time constants <inline-formula> <tex-math>$tau _{{2}}$ </tex-math></inline-formula> and <inline-formula> <tex-math>$tau _{{3}}$ </tex-math></inline-formula> increase significantly before 20 days of aging, while they decrease markedly after 20 days. The charge amounts Q₁–Q₃ released within the three relaxation time constants all increase with aging time. The traditional cable insulation aging factor A_cable, based on the charge amount ratio, does not show a monotonic increase after aging, primarily due to the neglect of the DC component I₀ and Q₁. The improved charge ratio-based aging factor A_op exhibits a monotonic increase with aging time, and it shows a positive correlation with breakdown field strength, residual life, and the degradation trend of polymerization degree. Finally, an evaluation criterion for the aging factor A_op is proposed based on the residual life during the aging process of oil-paper insulation.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3216-3224"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124522","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":"Interfacial Charges Dynamics in Power Module Packaging Under DC and Square-Wave Voltages","authors":"Meng Chen;Yalin Wang;Lu Fan;Yani Wang;Yi Yin","doi":"10.1109/TDEI.2025.3648955","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3648955","url":null,"abstract":"The reliability of power module packaging insulation is critical for the stable and safe operation of high-voltage power devices. Within the module packaging, the interface between the encapsulation and the ceramic substrate represents a critical weak point, where dielectric discontinuities under applied voltage can cause interfacial charge accumulation, distort the electric field, and, in severe cases, compromise insulation performance. Understanding the interfacial charge dynamics is, therefore, essential for ensuring long-term reliability. This study investigates the spatiotemporal distribution of interfacial charges in power module silicone-direct bond copper (DBC) packaging under dc and unipolar square-wave voltages using a noninvasive electrostatic induction method. The results show that the dc voltage induces approximately twice as much interfacial charge accumulation as square-wave conditions. However, under square-wave voltages, the charge decay rate is slower. Subsequently, the possible generation of interfacial charges is discussed, including electrode injection, impurity ionization, and Maxwell–Wagner polarization. Moreover, two types of trap states are identified. Shallow traps are likely related to intrinsic defects and present similar depth despite of waveform and field strength. In contrast, the formation of deep traps is more complex. Although a dc electric field results in a larger amount of charge being trapped, a square-wave electric field drives the charges into deeper trap states. These findings highlight the combined influence of Maxwell–Wagner polarization and space-charge effects on interfacial charge dynamics, providing key insights into the mechanisms governing insulation aging and strategies for improving insulation reliability.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3253-3262"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124539","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":"Sparse Cross-Modal Enhancement-Driven Multimodal Graph Fusion Network for Partial Discharge Pattern Recognition","authors":"Weihao Sun;Yongpeng Xu;Yiming Zang;Zhuoxiao Li;Zhiyang Fu;Xiuchen Jiang","doi":"10.1109/TDEI.2025.3645712","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3645712","url":null,"abstract":"The types of partial discharge (PD) in gas-insulated switchgear (GIS) are closely associated with the severity of insulation faults. Thus, making precise identification of PD patterns is crucial for assessing the operational status of GIS. However, there are two challenges in the existing research. First, single-modal PD exhibits limitations in detection capabilities, leading to difficulties in obtaining high-quality samples under specific conditions. Second, the correlations among samples, which reflect the shared features among samples of a specific PD type, are commonly neglected. To address the aforementioned two challenges, this article proposes a sparse cross-modal enhancement-driven multimodal graph fusion network (SCE-MGFN). It can leverage auxiliary modalities to enhance the graph features of the dominant modality. The SCE module utilizes a sparse representation, thereby reducing computational complexity and pattern confusion risk during the multimodal enhancement process. In addition, a novel graph sample construction approach is proposed to extract the hidden spatial features of original phase-resolved PD (PRPD) patterns. The algorithm is validated on the full-scale GIS equipment. The model achieves the recognition accuracy of 97.5% on dataset D1 and 97.93% on dataset D2. The multimodal fusion method provides a better theoretical foundation for future research.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3695-3704"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124554","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":"Demonstrating Novel Interbridge Complementary FET: Capacitance Extraction Using Dielectric Permittivity Suppression and Conformal Mapping","authors":"Sandeep Kumar;Deven H. Patil;Navjeet Bagga","doi":"10.1109/TDEI.2025.3645707","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3645707","url":null,"abstract":"Complementary FET (CFET) is an astonishing transistor architecture that comprises a self-aligned nFET over pFET separated by a dielectric sidewall (<inline-formula> <tex-math>${D}_{text {SW}}$ </tex-math></inline-formula>), or vice versa, designed to obtain the optimal gate pitch. To facilitate an enhanced effective channel width without altering the gate pitch, we propose a novel interbridge (IB) CFET (IB-CFET) structure in this article, in which a laterally branched fin-shaped IB layer is appended between the self-aligned vertical sheets. The additional IB layer offers a potential improvement in <inline-formula> <tex-math>${I}_{text {ON}}$ </tex-math></inline-formula>/<inline-formula> <tex-math>${C}_{text {gg}}$ </tex-math></inline-formula>, <inline-formula> <tex-math>${g}_{text {m}}$ </tex-math></inline-formula>/<inline-formula> <tex-math>${C}_{text {gg}}$ </tex-math></inline-formula>, and <italic>RC</i> delay due to an increased overall channel area and reduced capacitance. We developed an analytical model framework for extracting the capacitance and <italic>RC</i> delay using conformal mapping (CM) and the permittivity suppression technique to capture the gate electrostatics, including IBs. Considering only nFET is <sc>on</small>, in IB-CFET, the total gate capacitance (<inline-formula> <tex-math>${C}_{text {gg}}text {)}$ </tex-math></inline-formula> is contributed: 40% by spacer capacitance (<inline-formula> <tex-math>${C}_{text {spr}}text {)}$ </tex-math></inline-formula>, 43% by channel (<inline-formula> <tex-math>${C}_{text {ch}}text {)}$ </tex-math></inline-formula>, 4% by outer fringing (<inline-formula> <tex-math>${C}_{text {OF}}text {)}$ </tex-math></inline-formula>, 6% by IB (<inline-formula> <tex-math>${C}_{text {IB}}text {)}$ </tex-math></inline-formula>, and ~7% by the cumulative capacitance of pFET and dielectric sidewall. IB-CFET shows ~8% lower <inline-formula> <tex-math>${C}_{text {gg}}$ </tex-math></inline-formula> than the conventional CFET, i.e., without IB; thereby offering ~9.95% lower <italic>RC</i> delay. Using well-calibrated TCAD models, we extracted the capacitance and <italic>RC</i> delay, which is further validated by our proposed model with a tolerable error of ~4%. The extracted <inline-formula> <tex-math>${I}_{text {ON}}$ </tex-math></inline-formula>/<inline-formula> <tex-math>${C}_{text {gg}}$ </tex-math></inline-formula> and <italic>g</i>_m/<inline-formula> <tex-math>${C}_{text {gg}}$ </tex-math></inline-formula> of the proposed IB-CFET are improved by 11.40% and 4.08%, respectively, compared to the baseline CFET. Thus, the proposed IB-CFET proves its potential as a promising candidate beyond the 3-nm technology node.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3431-3438"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124555","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":"Simulation of Space Charge Distribution in the Insulator Under Negative DC Voltage and Its Impact on Ice Flashover Voltage","authors":"Yuyao Hu;Wentao Jia;Xingliang Jiang;Richang Xian;Qiang Zhou;Haitao Wu","doi":"10.1109/TDEI.2026.3656475","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3656475","url":null,"abstract":"Space charges can reduce the flashover voltage of the insulators and adversely affect their normal operation. However, the research on space charges in the field of iced insulators remains scarce. This study took the FXBW-35/70 composite insulator as the research object, and a space charge distribution equation on the insulator surface under dc negative polarity voltage was derived. A 3-D simulation model was constructed to analyze the impacts of different voltage application time and voltage levels on electric field and space charge accumulation characteristics. The findings were further validated through natural icing experiments. The simulation results indicate that under negative dc voltage, negative charges predominantly accumulate on the lower surface of insulator sheds, while positive charges mainly gather on the upper surface. Space charge density initially increases rapidly and then approaches saturation as voltage application time extends, and it rises significantly with an increase in voltage level. The corresponding maximums of space charge densities are 5.46 and 9.1 mC/m³, respectively. Moreover, the influence of voltage level on space charge and water droplet trajectory is stronger than that of voltage application time. The accumulation of space charges exacerbates electric field distortion, elevating the maximum electric field strength of the insulator. Under the combined effects of applied voltage and space charges, a new discharge channel forms, ultimately leading to the extinction of the original arc. The flashover voltage of iced insulators exhibits a negative correlation with both voltage application time and voltage level. Based on this relationship, a multivariate fitting model for flashover voltage has been developed, with an average error of 7.3%. The space charge distribution is derived from simulation and validated indirectly through flashover experiments.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3871-3881"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149124567","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":"IEEE Transactions on Dielectrics and Electrical Insulation Information for Authors","authors":"","doi":"10.1109/TDEI.2026.3737436","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3737436","url":null,"abstract":"","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"C4-C4"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11726372","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-Term Aging Dynamics and Curing Mechanisms: Key Factors and Insights for ±525-kV HVdc XLPE Cable Durability","authors":"Feng Xia;Muhammad Awais;Yuyang Jin;Tianyin Zhang;Taqi ur Rahman;Pouleros Konstantinos;Yuantao Zhao;Xiangrong Chen","doi":"10.1109/TDEI.2025.3645171","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3645171","url":null,"abstract":"Recently, a newly developed ±525-kV high-voltage direct current (HVdc) cross-linked polyethylene (XLPE) insulated cable system has been extensively adopted around the world for large power transmission over long distances. Several HV cable manufacturers around the world have successfully passed the prequalification and type test with ±525-kV HVdc XLPE cable. However, no investigation is presented about the aging performance of XLPE after such extreme electrothermal aging for such a long duration. The electrical insulation of HVdc cables is extremely sensitive to high electric field and high temperature, which extensively increases the space charge accumulation and dc conductivity of the insulation and, hence, accelerates the aging. To investigate the long-term performance of the XLPE insulation, three different XLPE samples, i.e., unaged, thermally aged (>360 days), and electrothermally aged (>360 days of aging under various polarity reversals and heating cycles according to CIGRE TB 852), are prepared from real XLPE cables. Various physicochemical and dielectric experiments are conducted. The results demonstrate that aging has either enhanced (e.g., conductivity, space charge behavior, and charge trapping characteristics) or at minimum stabilized (e.g., electrical strength and dielectric response) the electrical insulation properties of XLPE. From a materials science perspective, the morphological structure of XLPE remains largely unaffected by prolonged aging stress, while its overall material characteristics exhibit noticeable improvement. The interplay between postcuring, extended degassing, and dynamics of charge trapping plays a critical role in the development of overall properties of XLPE for HVdc cable insulation applications.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3556-3565"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125519","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":"Broadband Blended Multitaper Antipodal Vivaldi Antenna for Partial Discharge Detection","authors":"Bilal Habib;Omar Al Zaabi;Noureddine Harid;Khalifa Al Hosani","doi":"10.1109/TDEI.2026.3657347","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3657347","url":null,"abstract":"The electromagnetic ultra-high frequency (UHF) method is gaining popularity due to its noninvasive nature, immunity to low-frequency noise, and fault localization. It has wide applicability in gas-insulated substations (GIS), power transformers, and other power equipment during site acceptance tests or other online diagnostic routines when the usage of standard IEC 60270 method is not possible. In this article, a broadband blended multitaper anti-podal Vivaldi antenna (AVA) having a bandwidth between 500 MHz and 10 GHz is designed and successfully tested for partial discharge (PD) measurement. The antenna design and optimization are discussed, and the results of computer simulations and laboratory measurements are presented. These consist of impedance BW, surface current distribution, group delay (less than 2 ns), and gain in <inline-formula> <tex-math>$E$ </tex-math></inline-formula>- and <inline-formula> <tex-math>$H$ </tex-math></inline-formula>-planes (ranging from 0 to 9 dBi). Subsequently, the PD detection performance of the proposed antenna is comprehensively verified using a fast pulse generator, corona, surface, and internal cavity discharge. The time-domain waveforms are compared with a commercial horn antenna (used as a reference), and it is demonstrated that the proposed AVA sensor performs at par with the reference. Additionally, separate performance comparisons are carried out with published literature based on antenna and PD detection parameters. It is observed that the proposed PD sensor outperforms others in frequency coverage, fractional BW, gain, and group delay in terms of antenna performance metrics. Moreover, it also displays superior performance in capturing PD pulse rise time with high phase linearity and detection sensitivity. The proposed antenna has the potential to be used in GIS applications as an external sensor placed in front of unshielded observation windows or barrier insulator spacers to detect the leaked PD-induced EM waves.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3491-3500"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125463","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 Practical Transformer Lifespan Prediction by Integrating DGA, Insulation Parameters, and Operating Temperature Analysis Using Fuzzy Logic","authors":"Irfan Mulyawan Malik;Anurag Sharma;R. T. Naayagi","doi":"10.1109/TDEI.2025.3637804","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3637804","url":null,"abstract":"Power transformers are critical aspects in electrical power systems, and their unexpected failures can lead to significant disruptions and costs. In this article, a practical method for transformer lifespan prediction is developed by comprehensively integrating dissolve gas analysis (DGA), insulation parameters, and operating temperature, using readily available data collected during routine maintenance. The insulation parameters considered in this work include furan, moisture, and interfacial tension (IFT) as the main and noninvasive inputs. The degree of polymerization (DP) is included as an optional, high-fidelity parameter to demonstrate the model’s capacity to incorporate the laboratory data when available, without affecting its low-cost, field-applicable nature. DGA indicates transformer health by detecting the presence of fault gases dissolved, which signify the breakdown of insulation materials. The presence of low DP, increased furan and moisture content and reduced IFT are indicators of transformer insulation degradation, leading to a shortened lifespan. Furthermore, elevated operating temperatures accelerate the insulation degradation. The uncertainties inherent in transformer aging, such as insulation parameters degradation and oil condition, are addressed using fuzzy logic by representing imprecise data using a membership function (MF) and incorporating expert knowledge and assessment through “if–then” rules, resulting in a robust and practical approach. The proposed approach is tested and validated with the real-world industry data from the existing literature. Validation using real-world industry data shows that the proposed integrated approach reduces the average error in lifespan prediction by 2.41% for a diverse set of in-service transformers, confirming its superior accuracy and practical value.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3901-3909"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125488","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 the Variation and Influencing Mechanism of Surface Discharge in Oil-Paper Insulation Under Vibration","authors":"Jiayi Guo;Shuaibiao Zeng;Baolong Chen;Yunpeng Liu;Yumeng Liu","doi":"10.1109/TDEI.2026.3701694","DOIUrl":"https://doi.org/10.1109/TDEI.2026.3701694","url":null,"abstract":"Oil-paper insulation is a vital component of high-voltage electrical equipment, and its performance directly affects the reliability and service life of such equipment. In service, ultrahigh-voltage (UHV) oil-immersed shunt reactors are frequently subjected to intense mechanical vibrations. To investigate the effect of mechanical vibration on the surface discharge characteristics of oil-paper insulation, this study established a mechanical vibration–surface discharge test platform and conducted surface discharge experiments under various vibration conditions. The inception voltage, surface flashover voltage, discharge patterns, and characteristic parameters were systematically investigated. The results show that mechanical vibration significantly reduces the discharge threshold of oil-paper insulation and enhances the local electric field intensity, leading to more intense discharge activity. Both the increased vibration amplitude and frequency intensify the severity of surface discharge. Scanning electron microscopy reveals severe fiber breakage on the insulating paperboard surfaces under vibration. Simulation results and experimental observations identify multiple mechanisms: dynamic distortion of the electric field, accelerated material aging, and mechanical vibration-induced alteration of discharge path structures.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"33 5","pages":"3234-3243"},"PeriodicalIF":3.3,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125551","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}