Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050095
Da Xu, Chuang Li, Qinglong Jiao, Jieyin Huang
As new equipment development cycles are too long, there is an urgent need for comprehensive evaluation in the virtual prototype stage for equipment maintainability. This paper takes the characteristics of the design stage to construct a comprehensive evaluation index system, and puts forward subjective and objective weighting methods in a combination weighting method for an index of weights. Finally, a practical example is given to verify the method's rationality. The results of this study of comprehensive evaluation of new equipment maintainability and subsequent stereotypes have important reference value.
{"title":"Research on a comprehensive evaluation of equipment maintainability qualitative index based on virtual prototypes","authors":"Da Xu, Chuang Li, Qinglong Jiao, Jieyin Huang","doi":"10.1109/ICRMS.2016.8050095","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050095","url":null,"abstract":"As new equipment development cycles are too long, there is an urgent need for comprehensive evaluation in the virtual prototype stage for equipment maintainability. This paper takes the characteristics of the design stage to construct a comprehensive evaluation index system, and puts forward subjective and objective weighting methods in a combination weighting method for an index of weights. Finally, a practical example is given to verify the method's rationality. The results of this study of comprehensive evaluation of new equipment maintainability and subsequent stereotypes have important reference value.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133151272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050121
Z. Wu, Jie Liu, Siyang Xu
Cyberspace security situation awareness (SSA) is important to guarantee the safety of the foundation of a country. Current studies focus mainly on how to acquire SSA data via a fusion information method, while a full understanding of existing SSA data has not been obtained. In this paper, complex network theory is introduced to model SSA data, and SSA state information is connected to the properties of the constructed network. Through analyzing the property quantities of the network, we can more effectively mine the characteristics of current data. A case study is conducted to demonstrate our method on a real traffic trace collected by an authority lab, and the test results verified that the property quantities of complex network can expose SSA messages about current state and future tendencies.
{"title":"A cyberspace security situation awareness model based on complex network","authors":"Z. Wu, Jie Liu, Siyang Xu","doi":"10.1109/ICRMS.2016.8050121","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050121","url":null,"abstract":"Cyberspace security situation awareness (SSA) is important to guarantee the safety of the foundation of a country. Current studies focus mainly on how to acquire SSA data via a fusion information method, while a full understanding of existing SSA data has not been obtained. In this paper, complex network theory is introduced to model SSA data, and SSA state information is connected to the properties of the constructed network. Through analyzing the property quantities of the network, we can more effectively mine the characteristics of current data. A case study is conducted to demonstrate our method on a real traffic trace collected by an authority lab, and the test results verified that the property quantities of complex network can expose SSA messages about current state and future tendencies.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130811050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050109
Y. Jie, Wei Wang, Xue Bai, Yongxiang Li
In order to quantitatively assess the reliability of high microgravity science experiment system in Chinese space stations, a reliability assessment approach based on probabilistic risk assessment (PRA) is proposed. Uncertainty analysis is a core problem in PRA, which must be addressed. There are several methods for analyzing uncertainty such as Monte Carlo simulation, interval analysis, probability bounds, the Dempster-Shafer theory of evidence, and fuzzy set theory. When the probability distributions of random input variables are specified, but the parameters are intervals, probability bounds analysis is an effective way to analyze the uncertainty of PRA. By constructing the probability boxes (p-boxes) of basic events, using the event chain model of PRA, uncertainty can be propagated from basic events to end states. The uncertainty analysis results verify the feasibility of probability bounds analysis of PRA in high microgravity science experiment system, and will provide a reference for the subsequent study of the quantitative risk assessment of space utilization payloads.
{"title":"Uncertainty analysis based on probability bounds in probabilistic risk assessment of high microgravity science experiment system","authors":"Y. Jie, Wei Wang, Xue Bai, Yongxiang Li","doi":"10.1109/ICRMS.2016.8050109","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050109","url":null,"abstract":"In order to quantitatively assess the reliability of high microgravity science experiment system in Chinese space stations, a reliability assessment approach based on probabilistic risk assessment (PRA) is proposed. Uncertainty analysis is a core problem in PRA, which must be addressed. There are several methods for analyzing uncertainty such as Monte Carlo simulation, interval analysis, probability bounds, the Dempster-Shafer theory of evidence, and fuzzy set theory. When the probability distributions of random input variables are specified, but the parameters are intervals, probability bounds analysis is an effective way to analyze the uncertainty of PRA. By constructing the probability boxes (p-boxes) of basic events, using the event chain model of PRA, uncertainty can be propagated from basic events to end states. The uncertainty analysis results verify the feasibility of probability bounds analysis of PRA in high microgravity science experiment system, and will provide a reference for the subsequent study of the quantitative risk assessment of space utilization payloads.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133035646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050078
Dongpao Hong, J. Yan, Jing Zhang, X. Liao
To improve the precision of reliability assessment on shipborne weapon, the stochastic on environment, function, status, evolvement of shipborne weapon were studied, and a synthetic reliability assessment method for shipborne weapon based on dynamic population statistics was proposed. According to the character of the weapon system, the theory of dynamic population statistics was introduced to describe the relation of reliability between varied environments, varied objects and varied phases, and the reliability model was established. Then, based on the model, the test data from various environment conditions, various development phases, various structures and various objects were used to assess the reliability of shipborne weapon. The various test data is used synthetically to enlarge the sample size and increase the information for reliability assessment with the method. The present method is used to assess the reliability of one shipborne weapon. The result shows that the method is able to improve the precision of reliability assessment.
{"title":"Synthetic reliability assessment for shipborne weapon based on dynamic population statistics","authors":"Dongpao Hong, J. Yan, Jing Zhang, X. Liao","doi":"10.1109/ICRMS.2016.8050078","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050078","url":null,"abstract":"To improve the precision of reliability assessment on shipborne weapon, the stochastic on environment, function, status, evolvement of shipborne weapon were studied, and a synthetic reliability assessment method for shipborne weapon based on dynamic population statistics was proposed. According to the character of the weapon system, the theory of dynamic population statistics was introduced to describe the relation of reliability between varied environments, varied objects and varied phases, and the reliability model was established. Then, based on the model, the test data from various environment conditions, various development phases, various structures and various objects were used to assess the reliability of shipborne weapon. The various test data is used synthetically to enlarge the sample size and increase the information for reliability assessment with the method. The present method is used to assess the reliability of one shipborne weapon. The result shows that the method is able to improve the precision of reliability assessment.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120905686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050080
D. Dong, Wenjin Zhang, Zhengyang Chen, Kaiyuan Lu
With the rapid development of science and technology, and the continuous improvement of industrial manufacturing and reliability, the quantitative assessment of reliability and life is very important. As a kind of high-reliability and long-life product, film capacitor is widely used in communication, locomotive, and wind power generation, etc. Such a situation presents higher requirements for the life assessment method of film capacitors. Generally, we use the method of accelerated life testing for the evaluation of the product life of high-reliability and long-life. In order to assess the life of the film capacitor effectively and accurately, then further study the life situation of the system which film capacitor in, this paper is based on the cumulative failure model, through the analysis of the film capacitor failure conditions. What's more, this paper determines the lifetime distribution and acceleration model. Then optimizes accelerated life testing by using genetic algorithm and D-optimal. At last, Monte Carlo simulation is used to verify the testing optimum design.
{"title":"A life evaluation method of film capacitor using accelerated life testing","authors":"D. Dong, Wenjin Zhang, Zhengyang Chen, Kaiyuan Lu","doi":"10.1109/ICRMS.2016.8050080","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050080","url":null,"abstract":"With the rapid development of science and technology, and the continuous improvement of industrial manufacturing and reliability, the quantitative assessment of reliability and life is very important. As a kind of high-reliability and long-life product, film capacitor is widely used in communication, locomotive, and wind power generation, etc. Such a situation presents higher requirements for the life assessment method of film capacitors. Generally, we use the method of accelerated life testing for the evaluation of the product life of high-reliability and long-life. In order to assess the life of the film capacitor effectively and accurately, then further study the life situation of the system which film capacitor in, this paper is based on the cumulative failure model, through the analysis of the film capacitor failure conditions. What's more, this paper determines the lifetime distribution and acceleration model. Then optimizes accelerated life testing by using genetic algorithm and D-optimal. At last, Monte Carlo simulation is used to verify the testing optimum design.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116112624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050143
Hongwu Xu, Lei Wu, Ran Chen
Brushless direct current (BLDC) motors are usually designed for long-term operation and have high experimental costs and less test data than other motors. In the traditional performance and reliability analysis, the performance and reliability are generally analyzed separately. However, when one of these cannot meet the requirements, researchers usually have to redesign the system. In order to solve these problems, the optimization of both the performance and reliability of a BLDC motor was proposed. This paper shows how the control system model of a BLDC motor was simulated using Saber, which was modified by the engineering data. A sensitivity analysis was used to determine the design dependent parameters and performance parameters of a BLDC motor, which could vary as a result of the manufacturing conditions, environmental temperature, and device degradation. The performance of a BLDC motor was analyzed using a Monte Carlo method, and the reliability of the BLDC motor was obtained using a statistical method according to the fault criterion. The dual response surfaces analysis method could optimize the performance and reliability simultaneously, providing a new method for the analysis of a motor.
{"title":"Optimization of performance and reliability of brushless direct current motor","authors":"Hongwu Xu, Lei Wu, Ran Chen","doi":"10.1109/ICRMS.2016.8050143","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050143","url":null,"abstract":"Brushless direct current (BLDC) motors are usually designed for long-term operation and have high experimental costs and less test data than other motors. In the traditional performance and reliability analysis, the performance and reliability are generally analyzed separately. However, when one of these cannot meet the requirements, researchers usually have to redesign the system. In order to solve these problems, the optimization of both the performance and reliability of a BLDC motor was proposed. This paper shows how the control system model of a BLDC motor was simulated using Saber, which was modified by the engineering data. A sensitivity analysis was used to determine the design dependent parameters and performance parameters of a BLDC motor, which could vary as a result of the manufacturing conditions, environmental temperature, and device degradation. The performance of a BLDC motor was analyzed using a Monte Carlo method, and the reliability of the BLDC motor was obtained using a statistical method according to the fault criterion. The dual response surfaces analysis method could optimize the performance and reliability simultaneously, providing a new method for the analysis of a motor.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116188696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050135
Wengang Gu, Wenxiao Fang
This paper presents the topical researches on novel microelectric devices in recent years. With the nanometerization of microelectric devices, new materials such as GaN, SiC, and new structures such as MEMS, SOI, SIP, have been adopted widely. We focus on their reliability studies, and then propose the methodology and suggestions on reliability studies of novel microelectronic devices.
{"title":"The topical issues on the advancement and reliability of novel microelectronic devices","authors":"Wengang Gu, Wenxiao Fang","doi":"10.1109/ICRMS.2016.8050135","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050135","url":null,"abstract":"This paper presents the topical researches on novel microelectric devices in recent years. With the nanometerization of microelectric devices, new materials such as GaN, SiC, and new structures such as MEMS, SOI, SIP, have been adopted widely. We focus on their reliability studies, and then propose the methodology and suggestions on reliability studies of novel microelectronic devices.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122724964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050116
Shuqiao Zhou, Chao Guo, Duo Li
A high-temperature gas-cooled reactor-pebble bed module (HTR-PM), as a demonstration nuclear power plant (NPP), is now under construction in the Shandong province of China. The reactor protection system (RPS) in an HTR-PM is a safety-related system and is mainly in charge of monitoring safety-related parameters according to the reactor protection requirements. Thus, an RPS is very important to operations during the entire life cycle of an NPP. An RPS for an HTR-PM is completely designed and developed in China, which owns all intellectual property rights. Traditionally, the reliability of an RPS is evaluated based on a failure mode, effects, and criticality analysis (FMECA) and a fault tree analysis (FTA), which are static methods and cannot reflect the reliability of the system's dynamics. In this paper, we propose a dynamic reliability model for the RPS in an HTR-PM based on the Markov chain theory. Using this model, all states and their dynamic transition processes, especially the degradation process from a 2-out-of-4 structure to a 2-out-of-3 structure, are all determined. Moreover, based on this proposed model, an optimal surveillance test interval can be determined.
{"title":"Reliability analysis for the reactor protection system of HTR-PM","authors":"Shuqiao Zhou, Chao Guo, Duo Li","doi":"10.1109/ICRMS.2016.8050116","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050116","url":null,"abstract":"A high-temperature gas-cooled reactor-pebble bed module (HTR-PM), as a demonstration nuclear power plant (NPP), is now under construction in the Shandong province of China. The reactor protection system (RPS) in an HTR-PM is a safety-related system and is mainly in charge of monitoring safety-related parameters according to the reactor protection requirements. Thus, an RPS is very important to operations during the entire life cycle of an NPP. An RPS for an HTR-PM is completely designed and developed in China, which owns all intellectual property rights. Traditionally, the reliability of an RPS is evaluated based on a failure mode, effects, and criticality analysis (FMECA) and a fault tree analysis (FTA), which are static methods and cannot reflect the reliability of the system's dynamics. In this paper, we propose a dynamic reliability model for the RPS in an HTR-PM based on the Markov chain theory. Using this model, all states and their dynamic transition processes, especially the degradation process from a 2-out-of-4 structure to a 2-out-of-3 structure, are all determined. Moreover, based on this proposed model, an optimal surveillance test interval can be determined.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128652287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050052
Haihua Yan, Xiaowei Zhang, Zhen Zhang
The Modified Condition Decision Coverage (MC/DC) test criterion is a mandatory requirement for the testing of avionics software as per the DO-178B standard. In the implementation of safety-critical software, there are many complex logics and testing requirements are relatively high. In structure-based testing, MC/DC coverage has a strong ability to detect errors compared to decision or condition coverage. However, it isn't enough to prove that the implementation is correct; there may be defects still lurking in the software. In this paper we classified the flaws in Boolean expressions into four types based on the software faults model and analyzed the MC/DC sensitivity to these flaws. We found that MC/DC is not sensitive to the relational condition boundary error. Additionally, we present a testing criteria called Enhanced-Condition-MC/DC (EC-MC/DC) as a method of improving MC/DC testing adequacy. The validity and feasibility of the method are verified by real-world open source programs.
{"title":"Enhanced-condition-MC/DC: A method for improving MC/DC testing adequacy","authors":"Haihua Yan, Xiaowei Zhang, Zhen Zhang","doi":"10.1109/ICRMS.2016.8050052","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050052","url":null,"abstract":"The Modified Condition Decision Coverage (MC/DC) test criterion is a mandatory requirement for the testing of avionics software as per the DO-178B standard. In the implementation of safety-critical software, there are many complex logics and testing requirements are relatively high. In structure-based testing, MC/DC coverage has a strong ability to detect errors compared to decision or condition coverage. However, it isn't enough to prove that the implementation is correct; there may be defects still lurking in the software. In this paper we classified the flaws in Boolean expressions into four types based on the software faults model and analyzed the MC/DC sensitivity to these flaws. We found that MC/DC is not sensitive to the relational condition boundary error. Additionally, we present a testing criteria called Enhanced-Condition-MC/DC (EC-MC/DC) as a method of improving MC/DC testing adequacy. The validity and feasibility of the method are verified by real-world open source programs.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126180969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-01DOI: 10.1109/ICRMS.2016.8050070
Huimin Liang, Hao Yu, G. Zhai
Based on the magnetic circuit method for each component, consider the influence of leakage flux between coils and armatures, establish the equivalent magnetic circuit model of a certain type of magnetic latching relay and get the static attractive force curve. Pick targets for the parameter design by matching the attraction and reaction forces. Use robustness as the parameter design method to optimize the critical parameter of the sample. Finally, proceed to SNR and parameter design and get the optimized parameters. The new parameters not only satisfy the standards of output characteristics but also greatly improve the qualified rate of key points in matching attraction and reaction forces.
{"title":"Parameter design of magnetic latching relays","authors":"Huimin Liang, Hao Yu, G. Zhai","doi":"10.1109/ICRMS.2016.8050070","DOIUrl":"https://doi.org/10.1109/ICRMS.2016.8050070","url":null,"abstract":"Based on the magnetic circuit method for each component, consider the influence of leakage flux between coils and armatures, establish the equivalent magnetic circuit model of a certain type of magnetic latching relay and get the static attractive force curve. Pick targets for the parameter design by matching the attraction and reaction forces. Use robustness as the parameter design method to optimize the critical parameter of the sample. Finally, proceed to SNR and parameter design and get the optimized parameters. The new parameters not only satisfy the standards of output characteristics but also greatly improve the qualified rate of key points in matching attraction and reaction forces.","PeriodicalId":347031,"journal":{"name":"2016 11th International Conference on Reliability, Maintainability and Safety (ICRMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132523098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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：