IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第8页

Molecular Dynamics Study of the Viscosity Characteristics of Soybean Oil-Based Natural Ester Insulating Oil 大豆油基天然酯绝缘油粘度特性的分子动力学研究

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-10 DOI: 10.1109/TDEI.2025.3528311

Hanbo Zheng;Hongce Lan;Ke Wang;Shengwei Cai;Tao Yang;Yi Li;Yang Wang

{"title":"Molecular Dynamics Study of the Viscosity Characteristics of Soybean Oil-Based Natural Ester Insulating Oil","authors":"Hanbo Zheng;Hongce Lan;Ke Wang;Shengwei Cai;Tao Yang;Yi Li;Yang Wang","doi":"10.1109/TDEI.2025.3528311","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3528311","url":null,"abstract":"Many studies have shown that natural ester insulating oil is an excellent transformer oil with a superior flash point, fire resistance, and renewability compared to mineral insulating oil. However, due to their molecular properties, the high viscosity of natural ester insulating oils results in poor heat transfer, limiting their safe application in transformers. In this article, the viscosity values of the soybean oil-based natural ester insulating oil are measured experimentally in the temperature range of 293–433 K. The micromechanisms affecting the viscosity of natural ester insulating oil are investigated in conjunction with molecular dynamics simulations. We also conducted a correlation analysis between specific heat and viscosity and the simulation results. In addition, the kinematic viscosity of natural ester insulating oils as a function of temperature is obtained in this article by the free volume theory. The temperature ranges from 293 to 433 K, and the functional model closely agrees with the experimental measurements. The research in this article can be informative for the study and prediction of the viscosity of natural ester insulating oils as well as for the study of thermal conductivity.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"2068-2075"},"PeriodicalIF":3.1,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739881","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}

引用次数: 0

Insulation Structure Design for ±550-kV DC GIS Based on Multiobjective Optimization Algorithm 基于多目标优化算法的 ±550 千伏直流 GIS 绝缘结构设计

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-09 DOI: 10.1109/TDEI.2025.3527915

Boya Zhang;Haifei Tao;Yixuan Li;Xingwen Li;Zhenle Nan;Wei Luo;Yao Zheng;Guoli Wang

{"title":"Insulation Structure Design for ±550-kV DC GIS Based on Multiobjective Optimization Algorithm","authors":"Boya Zhang;Haifei Tao;Yixuan Li;Xingwen Li;Zhenle Nan;Wei Luo;Yao Zheng;Guoli Wang","doi":"10.1109/TDEI.2025.3527915","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527915","url":null,"abstract":"In high-voltage direct current gas-insulated switchgear (HVdc GIS), the problem of surface charge accumulation on insulators has garnered significant attention, limiting the development of dc GIS at high voltage levels. This study proposes an insulation structure optimization method based on a multiobjective optimization method to balance the tangential and normal electric fields on the insulator surface and mitigate local electric stress, achieving efficient and precise GIS insulation structure design. The optimization objectives include the tangential electric field and surface charge density. The study utilizes nondominated sorting genetic algorithm II (NSGA-II) and response surface methodology (RSM) to obtain the optimal structure for the conical insulator and shield of ±550-kV dc GIS. In addition, the study investigates the impact of gap distance on the surface charge and electric field distribution of the insulator. Ultimately, following insulation optimization design criteria, the study achieves the optimal structure and gap distance for ±550-kV GIS, providing crucial insights for the insulation design of HVdc GIS.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"1064-1073"},"PeriodicalIF":2.9,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783201","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}

引用次数: 0

Simulation of the Effect of Ion Migration Rate Increase and Fluctuations on Streamer Branching in Insulating Oil 离子迁移速率的增加和波动对绝缘油流线分支影响的模拟

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-09 DOI: 10.1109/TDEI.2025.3527963

Haochen Zuo;Zhengyong Huang;Chaofan Wang;Jian Li

{"title":"Simulation of the Effect of Ion Migration Rate Increase and Fluctuations on Streamer Branching in Insulating Oil","authors":"Haochen Zuo;Zhengyong Huang;Chaofan Wang;Jian Li","doi":"10.1109/TDEI.2025.3527963","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527963","url":null,"abstract":"Plasma in liquids is widely used in material processing, aerospace, medicine, and other fields. The study of discharge behavior in liquid dielectrics can reveal the formation mechanism of plasma at the physical level. This article presented a mathematical model that considers ion migration rate increase and electron mobility as well as the random fluctuation characteristic of ion. Our study is completed with finite element analysis (FEA), and theoretically study the inception and propagation of streamers in insulating oil. The results show that the morphology of streamer from the improved equations are consistent with experimental results, effectively presenting the propagation process of streamers at different voltages. The direction of the streamer branches will shift, and new branches appears in the initial branch head in the process of streamer propagation. Besides, the propagation velocity of the branch head is higher than the propagation velocity of the streamer tail. Additionally, the macroscopic size of the streamer is positively correlated with the voltage amplitude, with the highest ion density near the needle tip. This study can provide certain theoretical reference for the safe operation of power equipment.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"2090-2098"},"PeriodicalIF":3.1,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739791","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}

引用次数: 0

Aggregation Characteristics of Cellulose Particles of Different Sizes in Transformer Oil Under DC Electric Field 直流电场作用下不同粒径纤维素颗粒在变压器油中的聚集特性

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3527424

Xuan Meng;Haotian Wang;Yang Zhou;Xutao Han;Xuanrui Zhang;Junhao Li

{"title":"Aggregation Characteristics of Cellulose Particles of Different Sizes in Transformer Oil Under DC Electric Field","authors":"Xuan Meng;Haotian Wang;Yang Zhou;Xutao Han;Xuanrui Zhang;Junhao Li","doi":"10.1109/TDEI.2025.3527424","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527424","url":null,"abstract":"Under dc electric field, the migration and accumulation of cellulose particles in transformer oil will affect the oil insulation strength, thus threatening the normal operation of the converter transformer. In this work, a cellulose particle behavior observation platform is constructed, and the behavioral characteristics of cellulose particles of different particle sizes in transformer oil are analyzed through experimental and theoretical comparisons. The results show that the particle chains formed by large-sized cellulose particles extend relatively faster on the electrode surface, with relatively longer length and sparser distribution, making it easier to form stable cellulose bridges within the oil gap. Correspondingly, small-sized cellulose particles are difficult to form stable cellulose bridges in the oil gap. The increase in cellulose particle concentration has limited impact on the length of particle chains, thus it remains challenging for small particles with higher concentrations to form bridges. The external field force primarily influences the movement of particles between the electrodes, while the interparticle force mainly impacts the aggregation effect of the particles. Dipole interactions dominate in the formation of particle chains and are relatively stronger between ellipsoidal particles.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1557-1566"},"PeriodicalIF":2.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205971","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}

引用次数: 0

A Nondestructive Measurement Method for XLPE/SiR Interface Pressure of Flexible Cable Terminal Based on External Deformation Inversion Calculation 基于外变形反演计算的柔性电缆终端XLPE/SiR界面压力无损测量方法

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3527412

Yuan Li;Yumeng Liu;Pingtao Duan;Yefei Xu;Kai Zhou;Weijun Wang

{"title":"A Nondestructive Measurement Method for XLPE/SiR Interface Pressure of Flexible Cable Terminal Based on External Deformation Inversion Calculation","authors":"Yuan Li;Yumeng Liu;Pingtao Duan;Yefei Xu;Kai Zhou;Weijun Wang","doi":"10.1109/TDEI.2025.3527412","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527412","url":null,"abstract":"The insulation reliability of flexible cable terminals is largely determined by their interface pressure. A timely and accurate measurement of the pressure is hence of great importance for grasping the status of the terminal. Presently the interface pressure of cable terminal is generally measured by a built-in sensor method, which, however, requires sensors to be installed in advance. This will distort the electric field distribution and even induce discharges. Therefore, exploring an effective and nondestructive measurement method for interface pressure of on-site flexible cable terminals has great engineering significance. This article proposes a nondestructive measurement method for interface pressure of cross-linked polyethylene (XLPE)/silicone rubber (SiR) flexible cable terminals based on external deformation measurement (EDM) and its inversion calculation. We first established a mathematical model to build the relationship between external deformation parameters and the interface pressure of the terminal. Subsequently, we built an external deformation measuring platform based on a laser ranger and conducted measurements on real flexible terminal samples. Finally, the measurement results of the EDM method and built-in pressure strain gauges (SGs) method on different cable terminals were compared. The comparison result indicates that the pressure measurement deviation index of these two methods varies within the range of −6.2% to 6.1%, with an absolute error of less than 12.3%, verifying the effectiveness and accuracy of the EDM method.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"2344-2354"},"PeriodicalIF":3.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739796","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}

引用次数: 0

Performance Evaluation of Aeronautical Cables in Semi-Coaxial Geometries: A Novel Test Approach 航空电缆半同轴几何性能评价：一种新的试验方法

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3526091

Sofia P. Mavidou;David Clark;Michail Michelarakis;Christopher Stone;A. Manu Haddad

引用次数: 0

Dielectric, Mechanical, and Breakdown Properties of Liquid Silicone Rubber Under Different Thermal Aging Conditions 液体硅橡胶在不同热老化条件下的介电、力学和击穿性能

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3527431

Boxue Du;Yongping Hou;Xiaoxiao Kong;Qiang Fu

{"title":"Dielectric, Mechanical, and Breakdown Properties of Liquid Silicone Rubber Under Different Thermal Aging Conditions","authors":"Boxue Du;Yongping Hou;Xiaoxiao Kong;Qiang Fu","doi":"10.1109/TDEI.2025.3527431","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527431","url":null,"abstract":"To investigate the effect of thermal aging on the liquid silicone rubber (LSR) used for dry-type transformers, various LSR samples are aged at different temperatures of <inline-formula> <tex-math>$225~^{circ }$ </tex-math></inline-formula>C, <inline-formula> <tex-math>$250~^{circ }$ </tex-math></inline-formula>C, <inline-formula> <tex-math>$275~^{circ }$ </tex-math></inline-formula>C, and <inline-formula> <tex-math>$300~^{circ }$ </tex-math></inline-formula>C, with different aging times of 24, 48, 96, 336, and 504 h. The experimental results show that the aging process of LSR can be roughly divided into two stages depending on the result of competition between crosslinking reaction and fracture reaction, as evidenced by the FTIR. In the early stage, dc conductivity and integral charge Q(t) decrease, while the breakdown strength increases with the aging time increases, which are attributed to the more compact network structure caused by crosslinking reaction. The later stage is dominated by facture reaction with the deepening of thermal aging. Dielectric properties begin to show a decreasing trend. The breakdown strength could be reduced by 16.5% at <inline-formula> <tex-math>$300~^{circ }$ </tex-math></inline-formula>C with 504 h. Meanwhile, the mechanical properties of the tensile strength and the elongation at break are decreased by 73.2% and 85.2% after 504 h thermal aging at <inline-formula> <tex-math>$504~^{circ }$ </tex-math></inline-formula>C, respectively. Dielectric spectra are investigated under different aging conditions, and differential processing is performed to distinguish the different aging state of the LSR. The results show that the loss peak shifts toward the low frequency as the aging degrees increase. This article aims to provide a theoretical basis for the application of LSR for dry-type transformers.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"273-280"},"PeriodicalIF":2.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106403","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}

引用次数: 0

Effect of Electrical Field on Conductivity of Synthetic Ester Induced by Space Charge Accumulation 电场对空间电荷积累诱导合成酯电导率的影响

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3527414

Rui Yu;Shanika Matharage;Shuhang Shen;Zhongdong Wang;Motoo Tsuchie;Masahiro Kozako;Masayuki Hikita

{"title":"Effect of Electrical Field on Conductivity of Synthetic Ester Induced by Space Charge Accumulation","authors":"Rui Yu;Shanika Matharage;Shuhang Shen;Zhongdong Wang;Motoo Tsuchie;Masahiro Kozako;Masayuki Hikita","doi":"10.1109/TDEI.2025.3527414","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527414","url":null,"abstract":"Synthetic ester has emerged as an alternative in applications where mineral oil has traditionally been used. Furthermore, their new applications in areas such as converter transformers and battery energy storage systems are currently being investigated. Conductivity of insulating materials is a crucial parameter for such new applications. This article investigates the impact of electrical field on the conductivity of synthetic ester through a combination of experimental and simulation studies. The experimental results indicate that short-term conductivity increases while long-term conductivity exhibits a nonlinear trend with applied electrical field. The simulation results show that the increase in the measured short-term conductivity is due to field-enhanced charge dissociation while the nonlinear trend in the measured long-term conductivity is a combined effect of space charge accumulation and field distortion. Furthermore, the simulation model incorporating space charge accumulation and charge injection is used to explain electrical field dependent conductivity phenomena, and key parameters and formulae describing field enhanced intrinsic and injected charge density are identified for synthetic ester and compared with those of mineral oil.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 3","pages":"1279-1288"},"PeriodicalIF":2.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213598","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}

引用次数: 0

Equivalent Modeling of Multilayered Conductive Composite Materials for EMI Shielding Applications 多层导电复合材料在电磁干扰屏蔽中的等效建模

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-08 DOI: 10.1109/TDEI.2025.3527435

Youcef Amine Medjaouri;Karim Benzaoui;Achour Ales;Badreddine Rekioua;Redouane Tahmi;Dries Peumans;Johan Gyselinck;Yves Rolain

{"title":"Equivalent Modeling of Multilayered Conductive Composite Materials for EMI Shielding Applications","authors":"Youcef Amine Medjaouri;Karim Benzaoui;Achour Ales;Badreddine Rekioua;Redouane Tahmi;Dries Peumans;Johan Gyselinck;Yves Rolain","doi":"10.1109/TDEI.2025.3527435","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3527435","url":null,"abstract":"This article develops a single-layer equivalent model for multilayered shielding materials using measurements of complex permittivity and permeability. Through rectangular waveguide transmission/reflection (T/R) measurements, electromagnetic (EM) parameters and shielding effectiveness (SE) are evaluated. The aim is to establish an equivalent single-layer structure matching the SE of the original multilayered structure. Initial validation involves testing on simulated and experimental data of a reference single-layer material. The methodology is then applied to a novel three-layer PANI-<inline-formula> <tex-math>${text {Fe}_{{3}}}text {O}_{{4}}$ </tex-math></inline-formula>/carbon nanotube (CNT)/PANI-<inline-formula> <tex-math>${text {Fe}_{{3}}}text {O}_{{4}}$ </tex-math></inline-formula> composite material. Unlike conventional approaches requiring new multilayered material synthesis, this approach combines existing and widely available materials, simplifying characterization and reducing cost and complexity to achieve the desired SE. Comparative analysis with analytical SE values from transmission line matrix (TLM) formulation is conducted using simulated data. The proposed approach is validated in the X-band frequency range using analytical TLM formulation, numerical simulation, and experimental data. The proposed approach exhibits good performance in reconstructing the equivalent model.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"1923-1929"},"PeriodicalIF":3.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739989","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}

引用次数: 0

Temperature Dependence of Self-Healing in BOPP Metallized Film Capacitors Under Rising Voltage 升压下BOPP金属化薄膜电容器自愈的温度依赖性

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-07 DOI: 10.1109/TDEI.2025.3526749

Jie Zhang;Feipeng Wang;Yushuang He;Zhicheng Zhang;Jian Li;Weigen Chen

{"title":"Temperature Dependence of Self-Healing in BOPP Metallized Film Capacitors Under Rising Voltage","authors":"Jie Zhang;Feipeng Wang;Yushuang He;Zhicheng Zhang;Jian Li;Weigen Chen","doi":"10.1109/TDEI.2025.3526749","DOIUrl":"https://doi.org/10.1109/TDEI.2025.3526749","url":null,"abstract":"Self-healing (SH) plays as a unique property to benefit biaxially oriented polypropylene (BOPP) metallized film capacitors (MFCs) for high operation reliability in applications needing high volumetric energy property. However, massive heat could be accumulated inside BOPP MFCs upon long-term operation owing to the poor thermal conductivity of BOPP. The resulting temperature rise inside MFCs could bring seriously orientation to SHs considering the SHs a temperature-dependent progress. This study employs a mesoscopic and microscopic view to elucidate the temperature dependence of SHs with multiple Weibull subpopulation distributions aided by the examination of the morphology of demetallized area on BOPP layer after SH. As the couple of evidence, the variation of free volume and mean-square-displacement (MSD) of polypropylene (PP) with temperature are evaluated to illustrate the mechanism of temperature-dependent properties of SH. The findings reveal that moderate temperature increases can enhance SH inception voltage (SHIV), but excessively high temperatures have a detrimental effect. Furthermore, expected capacitor voltage (ECV) decreases with rising temperatures. The study also observes that both SHIV and ECV increase and then decrease with the voltage ramp rate, peaking at 300 V/s within the range of 50–900 V/s.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 4","pages":"1949-1957"},"PeriodicalIF":3.1,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739896","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}

引用次数: 0