Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456574
Lei Chen;Yifei Li;Man Yang;Jiahui Zhu;Shencong Zheng;Jingguang Tang;Yuqi Jiang;Hongkun Chen
The improved flux-coupling-type superconducting fault current limiter (FC-SFCL) is a favorable option to fulfill the short-circuit current suppression in a power system, due to its fully-controlled features and two-level current-limiting modes. This paper explores the application of the FC-SFCLs in the power system, where the accurate fault current prediction is realized by the SAO-LSTM model. By integrating the snow ablation optimizer (SAO) and the long short-term memory (LSTM) network, the SAO-LSTM model is capable of extracting the fault current characteristics and reflecting the long-term historical process to forecast the fault current. Thus, the FC-SFCLs may select the appropriate current-limiting modes to handle the faults. The theoretical description of the FC-SFCL is conducted, and the fault current prediction method based on the SAO-LSTM model is expatiated. Using MATLAB, a modified IEEE 13-node system equipped with the FC-SFCLs is modeled. Different fault locations, fault types, and fault resistances are considered to build the dataset, and the prediction performance of the SAO-LSTM model for minor and severe faults is checked. The findings show that the SAO-LSTM model can effectively identify the severity of the faults, and the current-limiting efficiency of the FC-SFCLs under different fault severities and phase angles can be well exploited.
{"title":"Application of Flux-Coupling-Type SFCLs in a Power System Considering Fault Current Prediction Based on SAO-LSTM Model","authors":"Lei Chen;Yifei Li;Man Yang;Jiahui Zhu;Shencong Zheng;Jingguang Tang;Yuqi Jiang;Hongkun Chen","doi":"10.1109/TASC.2024.3456574","DOIUrl":"10.1109/TASC.2024.3456574","url":null,"abstract":"The improved flux-coupling-type superconducting fault current limiter (FC-SFCL) is a favorable option to fulfill the short-circuit current suppression in a power system, due to its fully-controlled features and two-level current-limiting modes. This paper explores the application of the FC-SFCLs in the power system, where the accurate fault current prediction is realized by the SAO-LSTM model. By integrating the snow ablation optimizer (SAO) and the long short-term memory (LSTM) network, the SAO-LSTM model is capable of extracting the fault current characteristics and reflecting the long-term historical process to forecast the fault current. Thus, the FC-SFCLs may select the appropriate current-limiting modes to handle the faults. The theoretical description of the FC-SFCL is conducted, and the fault current prediction method based on the SAO-LSTM model is expatiated. Using MATLAB, a modified IEEE 13-node system equipped with the FC-SFCLs is modeled. Different fault locations, fault types, and fault resistances are considered to build the dataset, and the prediction performance of the SAO-LSTM model for minor and severe faults is checked. The findings show that the SAO-LSTM model can effectively identify the severity of the faults, and the current-limiting efficiency of the FC-SFCLs under different fault severities and phase angles can be well exploited.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456556
Tiankai Yang;Boxuan Cao;Chao Wang
Safely completing voyages is vital for all-electric ships (AESs). However, the existing voyage scheduling methods focus on the generation cost and merely consider the impact of the operation state of the shipboard power system on navigation security. Hence, considering power supply capacity constraints (PSCC), this paper establishes a chance-constrained optimal model for the joint generation and voyage scheduling of AESs. Firstly, considering the N-1 criterion, the linear expressions for PSCC of AESs are expressed based on the interconnection topology of shipboard inverters. Secondly, the explicit chance-constrained expressions for PSCC are established based on the Cornish-Fisher series expansion. Thirdly, a coordinated model is established for joint generation and voyage scheduling and solved by dynamic programming. The actual voyage data are used for simulations, and the results demonstrate the effectiveness of the proposed method.
{"title":"Joint Generation and Voyage Scheduling of All-Electric Ships Considering Power Supply Capacity Constraints","authors":"Tiankai Yang;Boxuan Cao;Chao Wang","doi":"10.1109/TASC.2024.3456556","DOIUrl":"10.1109/TASC.2024.3456556","url":null,"abstract":"Safely completing voyages is vital for all-electric ships (AESs). However, the existing voyage scheduling methods focus on the generation cost and merely consider the impact of the operation state of the shipboard power system on navigation security. Hence, considering power supply capacity constraints (PSCC), this paper establishes a chance-constrained optimal model for the joint generation and voyage scheduling of AESs. Firstly, considering the N-1 criterion, the linear expressions for PSCC of AESs are expressed based on the interconnection topology of shipboard inverters. Secondly, the explicit chance-constrained expressions for PSCC are established based on the Cornish-Fisher series expansion. Thirdly, a coordinated model is established for joint generation and voyage scheduling and solved by dynamic programming. The actual voyage data are used for simulations, and the results demonstrate the effectiveness of the proposed method.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456570
Shuai Wang;Mingyao Lin
In this paper, a novel axial-field permanent magnet (AFPM) motor is presented and the optimal stator-slot/rotor-pole combination is explored for great performance. This machine contains two stators with split teeth and an inner rotor with consequent-pole (CP) PMs. The stator configuration achieves a harmonious balance between a high winding factor and an elevated torque amplification capability, while the rotor structure enhances PM utilization. The investigation into the slot/pole combination is primarily driven by two considerations: winding configuration and the number of ferromagnetic pole pieces attached to each main tooth. The introduced CP PM brings about direct component (DC) bias and even-number harmonics in the flux linkage of each winding, which must be eliminated by selecting appropriate winding configurations. Additionally, the number of ferromagnetic pole pieces has a significant influence on the magnetic gearing effect and iron saturation. In this way, the torque characteristics and power factor are compared using the finite element method. A 12-slot/24-flux-modulation-pole (FMP) /19-rotor-pole AFPM machine is fabricated and experimented to confirm the effectiveness.
{"title":"Optimal Slot/Pole Combination of Axial-Field Flux-Modulated Machines With Split Teeth","authors":"Shuai Wang;Mingyao Lin","doi":"10.1109/TASC.2024.3456570","DOIUrl":"10.1109/TASC.2024.3456570","url":null,"abstract":"In this paper, a novel axial-field permanent magnet (AFPM) motor is presented and the optimal stator-slot/rotor-pole combination is explored for great performance. This machine contains two stators with split teeth and an inner rotor with consequent-pole (CP) PMs. The stator configuration achieves a harmonious balance between a high winding factor and an elevated torque amplification capability, while the rotor structure enhances PM utilization. The investigation into the slot/pole combination is primarily driven by two considerations: winding configuration and the number of ferromagnetic pole pieces attached to each main tooth. The introduced CP PM brings about direct component (DC) bias and even-number harmonics in the flux linkage of each winding, which must be eliminated by selecting appropriate winding configurations. Additionally, the number of ferromagnetic pole pieces has a significant influence on the magnetic gearing effect and iron saturation. In this way, the torque characteristics and power factor are compared using the finite element method. A 12-slot/24-flux-modulation-pole (FMP) /19-rotor-pole AFPM machine is fabricated and experimented to confirm the effectiveness.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456558
Wei He;Jing Zhao;Lei Yang;Youguang Guo
As a pioneering multi-DOF motor, the Integrated Magnetic Suspension Spherical Induction Motor (IMSSIM) presents many advantages. Nonetheless, the IMSSIM presents a complex magnetic coupling challenge. This paper addresses the magnetic coupling issue in IMSSIM through a comprehensive investigation using the 3D finite element method (FEM). The magnetic coupling coefficients which reflect the magnetic coupling degree are proposed and analyzed. Moreover, the dynamic coupling effect inside the IMSSIM is analyzed and studied. Finally, accuracy of FEM is verified by prototype experiments.
{"title":"Magnetic Field Coupling Analysis in Integrated Magnetic Suspension Spherical Induction Motors","authors":"Wei He;Jing Zhao;Lei Yang;Youguang Guo","doi":"10.1109/TASC.2024.3456558","DOIUrl":"10.1109/TASC.2024.3456558","url":null,"abstract":"As a pioneering multi-DOF motor, the Integrated Magnetic Suspension Spherical Induction Motor (IMSSIM) presents many advantages. Nonetheless, the IMSSIM presents a complex magnetic coupling challenge. This paper addresses the magnetic coupling issue in IMSSIM through a comprehensive investigation using the 3D finite element method (FEM). The magnetic coupling coefficients which reflect the magnetic coupling degree are proposed and analyzed. Moreover, the dynamic coupling effect inside the IMSSIM is analyzed and studied. Finally, accuracy of FEM is verified by prototype experiments.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Transformer winding subjected to alternating stresses caused by multiple short circuits can fail by fatigue even though the stress is below the yield point. The effect of the mean stress of unidirectional impulse pulsating short-circuit force is not considered in previous studies. Therefore, this paper proposes a general method for assessing the stress fatigue life and damage of transformer winding under short-circuit conditions. Take a 110 kV transformer for an instance, the electromagnetic forces and stresses on the winding under short-circuit conditions were calculated based on electromagnetic-structural coupling. The dynamic measurement of short circuit force is realized by using the piezoelectric thin film polyvinylidene fluoride (PVDF) sensor to verify the accuracy of the simulation calculation. Based on finite element stress results, this paper proposes a five-step method for calculating stress fatigue life, the S - N curve of the copper winding is estimated, and the short-circuit force of the unidirectional impulse is corrected under the consideration of the mean stress effect. Both the fatigue life and damage of transformer winding is analyzed using the Palmgren-Miner model. The proposed methodology can evaluate the number of stress cycles leading to transformer winding failure as well as the weak link of winding fatigue life.
{"title":"Analysis Method of Transformer Fatigue Life and Damage Under Multiple Short-Circuit Conditions","authors":"Xiongbo Wang;Yan Li;Zhanyang Yu;Yuxin Miao;Peng Li;Zhengyu Xu","doi":"10.1109/TASC.2024.3450889","DOIUrl":"10.1109/TASC.2024.3450889","url":null,"abstract":"Transformer winding subjected to alternating stresses caused by multiple short circuits can fail by fatigue even though the stress is below the yield point. The effect of the mean stress of unidirectional impulse pulsating short-circuit force is not considered in previous studies. Therefore, this paper proposes a general method for assessing the stress fatigue life and damage of transformer winding under short-circuit conditions. Take a 110 kV transformer for an instance, the electromagnetic forces and stresses on the winding under short-circuit conditions were calculated based on electromagnetic-structural coupling. The dynamic measurement of short circuit force is realized by using the piezoelectric thin film polyvinylidene fluoride (PVDF) sensor to verify the accuracy of the simulation calculation. Based on finite element stress results, this paper proposes a five-step method for calculating stress fatigue life, the \u0000<italic>S</i>\u0000-\u0000<italic>N</i>\u0000 curve of the copper winding is estimated, and the short-circuit force of the unidirectional impulse is corrected under the consideration of the mean stress effect. Both the fatigue life and damage of transformer winding is analyzed using the Palmgren-Miner model. The proposed methodology can evaluate the number of stress cycles leading to transformer winding failure as well as the weak link of winding fatigue life.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-04DOI: 10.1109/TASC.2024.3454314
Qun Lin;Shucheng Yang;Bicong Weng;Jie Ren
This work aims to optimize the superconducting single flux quantum (SFQ) combinational logic synthesis process to cope with the scaling up of superconducting SFQ integration. The majority of current research is based on ABC logic synthesis methods, which do not support multioutput logic gates, including mapping dual data flip-flop, resettable D flip-flop with clear, and their variants. Therefore, in the combinational logic optimization stage, we propose a local optimization method to search for specific logic in Boolean expressions by performing the characteristic representation of matrices to achieve technology mapping for multioutput SFQ gates. Moreover, we use multioutput logic gates to replace the redundant logic in the circuit. We illustrate the operation of our approach on ISCAS benchmark circuits. By adopting our proposed methodology, the performance, power consumption, and area performance of SFQ circuits are improved, which also increases the efficiency of our cell library utilization.
{"title":"A Combinational Logic Optimization Method for Large-Scale SFQ Circuits","authors":"Qun Lin;Shucheng Yang;Bicong Weng;Jie Ren","doi":"10.1109/TASC.2024.3454314","DOIUrl":"10.1109/TASC.2024.3454314","url":null,"abstract":"This work aims to optimize the superconducting single flux quantum (SFQ) combinational logic synthesis process to cope with the scaling up of superconducting SFQ integration. The majority of current research is based on ABC logic synthesis methods, which do not support multioutput logic gates, including mapping dual data flip-flop, resettable D flip-flop with clear, and their variants. Therefore, in the combinational logic optimization stage, we propose a local optimization method to search for specific logic in Boolean expressions by performing the characteristic representation of matrices to achieve technology mapping for multioutput SFQ gates. Moreover, we use multioutput logic gates to replace the redundant logic in the circuit. We illustrate the operation of our approach on ISCAS benchmark circuits. By adopting our proposed methodology, the performance, power consumption, and area performance of SFQ circuits are improved, which also increases the efficiency of our cell library utilization.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 9","pages":"1-8"},"PeriodicalIF":1.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-30DOI: 10.1109/TASC.2024.3450860
Yannan Dong;Zhuo Ma;Qiwei Wang;Shaohua Ma;Zijiao Han
Hydrogen energy has an important role in superconducting energy storage cooling and materials synthesis. As the power-to-hydrogen (P2H) loads, alkaline electrolytic cells (AEC) and proton exchange membrane electrolytic cells (PEMEC) have different technical characteristics (TCs). This paper proposes an optimal capacity configuration model for the hybrid electrolytic cells P2H system in distribution system (DS). Firstly, a unified operating model for the electrolytic cell is established. Secondly, the optimal capacity configuration model is proposed with the objective function to minimize the total cost of the DS, including the numbers and capacity configuration of the hybrid electrolytic cells. Finally, the proposed model is verified by using the modified IEEE 33-bus system. The results show the total cost of the proposed model reduced by 4% and 11%, the hydrogen production power increase of 0.26% and 0.52% compared to the AEC and PEMEC configurations only. The study provides a reference for the configuration of large-scale hybrid electrolytic cells in power system.
{"title":"Optimal Capacity Configuration of Hybrid Electrolytic Cells Power to Hydrogen(P2H) System in Distribution System","authors":"Yannan Dong;Zhuo Ma;Qiwei Wang;Shaohua Ma;Zijiao Han","doi":"10.1109/TASC.2024.3450860","DOIUrl":"https://doi.org/10.1109/TASC.2024.3450860","url":null,"abstract":"Hydrogen energy has an important role in superconducting energy storage cooling and materials synthesis. As the power-to-hydrogen (P2H) loads, alkaline electrolytic cells (AEC) and proton exchange membrane electrolytic cells (PEMEC) have different technical characteristics (TCs). This paper proposes an optimal capacity configuration model for the hybrid electrolytic cells P2H system in distribution system (DS). Firstly, a unified operating model for the electrolytic cell is established. Secondly, the optimal capacity configuration model is proposed with the objective function to minimize the total cost of the DS, including the numbers and capacity configuration of the hybrid electrolytic cells. Finally, the proposed model is verified by using the modified IEEE 33-bus system. The results show the total cost of the proposed model reduced by 4% and 11%, the hydrogen production power increase of 0.26% and 0.52% compared to the AEC and PEMEC configurations only. The study provides a reference for the configuration of large-scale hybrid electrolytic cells in power system.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142169727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-29DOI: 10.1109/TASC.2024.3444535
{"title":"IEEE Foundation: Reflecting on 50 Years of Impact","authors":"","doi":"10.1109/TASC.2024.3444535","DOIUrl":"https://doi.org/10.1109/TASC.2024.3444535","url":null,"abstract":"","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 6","pages":"1-1"},"PeriodicalIF":1.7,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10659313","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142090779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-29DOI: 10.1109/TASC.2024.3451474
Zhengwei Zhao;Wenjiao Yang;Zhaoying Yan;Baozhu Jia;Yuanyuan Xu;Jun Luo
To improve the ride comfort of an electrodynamic suspension (EDS) train on the Yamanashi test line, an optimization of the air-cored superconducting linear synchronous motor (SLSM) is conducted to reduce the thrust ripple, considering the geometry of general racetrack coils. First, an analytical model based on general racetrack coils is given to calculate the thrust of the SLSM, which takes the elliptic effect edges into consideration. Second, combining the analytical model with the response surface method, a surrogate model is yielded to express the thrust with six variables. Third, the multiobjective optimization of the SLSM is carried out, taking the surrogate model as the fitness function of the genetic optimization algorithm. Fourth, the thrust ripple of the optimized SLSM is evaluated by finite-element models and compared with that of the original, considering the variable postures of the secondary resulting from the multi-degree-of-freedom motions of the EDS train. Finally, the optimization is verified by the measured thrust. Consequently, the thrust ripple of the SLSM is reduced by 49% with the invariant thrust and material consumption. In this work, an optimization of the SLSM is provided to enhance the comfort of the Yamanashi test line and the future EDS system.
{"title":"Multiobjective Optimization of Superconducting Linear Motor Considering General Racetrack Coils","authors":"Zhengwei Zhao;Wenjiao Yang;Zhaoying Yan;Baozhu Jia;Yuanyuan Xu;Jun Luo","doi":"10.1109/TASC.2024.3451474","DOIUrl":"10.1109/TASC.2024.3451474","url":null,"abstract":"To improve the ride comfort of an electrodynamic suspension (EDS) train on the Yamanashi test line, an optimization of the air-cored superconducting linear synchronous motor (SLSM) is conducted to reduce the thrust ripple, considering the geometry of general racetrack coils. First, an analytical model based on general racetrack coils is given to calculate the thrust of the SLSM, which takes the elliptic effect edges into consideration. Second, combining the analytical model with the response surface method, a surrogate model is yielded to express the thrust with six variables. Third, the multiobjective optimization of the SLSM is carried out, taking the surrogate model as the fitness function of the genetic optimization algorithm. Fourth, the thrust ripple of the optimized SLSM is evaluated by finite-element models and compared with that of the original, considering the variable postures of the secondary resulting from the multi-degree-of-freedom motions of the EDS train. Finally, the optimization is verified by the measured thrust. Consequently, the thrust ripple of the SLSM is reduced by 49% with the invariant thrust and material consumption. In this work, an optimization of the SLSM is provided to enhance the comfort of the Yamanashi test line and the future EDS system.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 9","pages":"1-9"},"PeriodicalIF":1.7,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：