Pub Date : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021216
Chunlei Bai, Peng Li, Yiwen Liu
In this article, we presented a reliability assessment method based on dependent competing failure model. In this model, we considered two failure processes: 1) soft failure caused by random degradation process; 2) hard failure caused by random shock process. And these two processes are dependent: 1) The shock process will accelerate degradation process; 2) After a certain number of shocks, the hard failure threshold will decrease; 3) with the degeneration of system, the probability of occurrence of the shock process will increase. In present research, most studies consider that every arriving shock will accelerate the degradation process, but because of the system resistance, not all shocks accelerate the degradation. Taking this into consideration, we research the shock process based on imperfect shock model. Finally, we verified this new method. And the results show that this method we presented is suitable to model the system failure behaviors.
{"title":"Reliability Assessment for Dependent Competing Failure Process with Shifting-Threshold and Imperfect Shock Model","authors":"Chunlei Bai, Peng Li, Yiwen Liu","doi":"10.1109/QR2MSE46217.2019.9021216","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021216","url":null,"abstract":"In this article, we presented a reliability assessment method based on dependent competing failure model. In this model, we considered two failure processes: 1) soft failure caused by random degradation process; 2) hard failure caused by random shock process. And these two processes are dependent: 1) The shock process will accelerate degradation process; 2) After a certain number of shocks, the hard failure threshold will decrease; 3) with the degeneration of system, the probability of occurrence of the shock process will increase. In present research, most studies consider that every arriving shock will accelerate the degradation process, but because of the system resistance, not all shocks accelerate the degradation. Taking this into consideration, we research the shock process based on imperfect shock model. Finally, we verified this new method. And the results show that this method we presented is suitable to model the system failure behaviors.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121893802","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 : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021271
Jinyu Zhou
In view of issues of multivariable, non-normality, nonlinear performance function and failure dependence of risk assessment for fiber reinforced composite laminates, an improved universal generating function approach is put forth in this paper for first-ply-failure analysis. We define universal generating function for resistance of each layer element on the basis of the Tsai-Hill strength theory, and build the reliability analysis model of the laminates according to the first-ply-failure criteria. In the compositional operation of universal generating functions, similar items merging and K-means clustering techniques are used to reduce computational cost. Numerical examples illustrate the application of the approach to composite laminates risk assessment. Analysis results show that the reliability obtained by the proposed approach is closer to the Monte Carlo simulation results than that obtained by conventional first order reliability methods. The new approach can provide a novel and feasible path for the strength reliability analysis of composite laminates.
{"title":"First-Ply-Failure Analysis of Fiber Reinforced Composite Laminates Based on Universal Generating Function","authors":"Jinyu Zhou","doi":"10.1109/QR2MSE46217.2019.9021271","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021271","url":null,"abstract":"In view of issues of multivariable, non-normality, nonlinear performance function and failure dependence of risk assessment for fiber reinforced composite laminates, an improved universal generating function approach is put forth in this paper for first-ply-failure analysis. We define universal generating function for resistance of each layer element on the basis of the Tsai-Hill strength theory, and build the reliability analysis model of the laminates according to the first-ply-failure criteria. In the compositional operation of universal generating functions, similar items merging and K-means clustering techniques are used to reduce computational cost. Numerical examples illustrate the application of the approach to composite laminates risk assessment. Analysis results show that the reliability obtained by the proposed approach is closer to the Monte Carlo simulation results than that obtained by conventional first order reliability methods. The new approach can provide a novel and feasible path for the strength reliability analysis of composite laminates.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116613421","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 : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021162
Shidong Luo, Xiaohong Bao, Yu Xin
Under the conditions of informationization and networked operations, the airborne communication network faces serious threats. Any unit under the network system needs to acquire and share real-time information. In this process, the information security problem of the airborne communication network is particularly important, ensuring the confidentiality, integrity and availability of the transmitted information can largely guarantee the smooth completion of the task. In view of this, this paper uses the decision of the key nodes of complex networks and the risk analysis method of the attack tree model to evaluate the information security of the airborne communication network. This method helps decision-makers find important communication nodes in the airborne communication network and the attack methods most likely to be exploited by attackers, then taking targeted defense measures.
{"title":"Information Security Risk Analysis of Airborne Communication Network","authors":"Shidong Luo, Xiaohong Bao, Yu Xin","doi":"10.1109/QR2MSE46217.2019.9021162","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021162","url":null,"abstract":"Under the conditions of informationization and networked operations, the airborne communication network faces serious threats. Any unit under the network system needs to acquire and share real-time information. In this process, the information security problem of the airborne communication network is particularly important, ensuring the confidentiality, integrity and availability of the transmitted information can largely guarantee the smooth completion of the task. In view of this, this paper uses the decision of the key nodes of complex networks and the risk analysis method of the attack tree model to evaluate the information security of the airborne communication network. This method helps decision-makers find important communication nodes in the airborne communication network and the attack methods most likely to be exploited by attackers, then taking targeted defense measures.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123176830","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 : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021269
Xiaoliang Wang, Sikun Mi, W. Dai, K. Liang
In this paper, based on the characteristics of ship complex system and usability requirements, we propose a usability assessment method applicable at the unit level and system level, including applicable conditions, calculation method of confidence lower limit and examples.
{"title":"The Usability Index Evaluation Method for Ship Complex Systems","authors":"Xiaoliang Wang, Sikun Mi, W. Dai, K. Liang","doi":"10.1109/QR2MSE46217.2019.9021269","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021269","url":null,"abstract":"In this paper, based on the characteristics of ship complex system and usability requirements, we propose a usability assessment method applicable at the unit level and system level, including applicable conditions, calculation method of confidence lower limit and examples.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129911408","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 : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021210
Zhicheng Zhu, Yisha Xiang, W. Cong, Hongchao Zhang, T. Jin
In the past decade, remanufacturing has been increasingly recognized as an important approach for realizing long-term efficiency and sustainability in manufacturing industry. A considerable number of tools and methods have been developed to facilitate the planning and operations of remanufacturing process. However, most of the studies focus on the end-of-life phase of product, which may lead to more negative environmental impacts, increased energy use and higher operational cost. Proactive remanufacturing is a new strategy that allows us to determine the optimal remanufacturing timing based on the health condition of a product. The research on environmental sustainability from proactive remanufacturing is still in the early stage. In this paper, we develop a stochastic program to proactively determine the remanufacturing timing with the objective of minimizing the total environmental impacts. Our preliminary results show that proactive remanufacturing strategy can further reduce the environmental impacts compared with the reactive or end-of-life remanufacturing scheme.
{"title":"A Proactive Remanufacturing Planning Model for Enhancing Environmental Sustainability","authors":"Zhicheng Zhu, Yisha Xiang, W. Cong, Hongchao Zhang, T. Jin","doi":"10.1109/QR2MSE46217.2019.9021210","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021210","url":null,"abstract":"In the past decade, remanufacturing has been increasingly recognized as an important approach for realizing long-term efficiency and sustainability in manufacturing industry. A considerable number of tools and methods have been developed to facilitate the planning and operations of remanufacturing process. However, most of the studies focus on the end-of-life phase of product, which may lead to more negative environmental impacts, increased energy use and higher operational cost. Proactive remanufacturing is a new strategy that allows us to determine the optimal remanufacturing timing based on the health condition of a product. The research on environmental sustainability from proactive remanufacturing is still in the early stage. In this paper, we develop a stochastic program to proactively determine the remanufacturing timing with the objective of minimizing the total environmental impacts. Our preliminary results show that proactive remanufacturing strategy can further reduce the environmental impacts compared with the reactive or end-of-life remanufacturing scheme.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129930656","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 : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021228
Sixu Feng, Ji-Xin Liu, Xiaohong Zeng
Severe congestion at airport surface has now become a major challenge in air traffic management. Earlier work on congestion mitigation for traffic on airport surface has made primary contributions on efficiency improvement from the view of resource assignment, so as to enlarge the current resource utility. However, subject to the complexity of modeling and unacceptable computational cost, integrated runway-taxiway-apron allocation for aircraft was rarely reported.This paper introduces a macroscopic view on flow characteristics of airport surface traffic, breaking through the traditional perspective of independent optimization of runway, taxiway and apron operations, in order to adapt the road traffic assignment method to airport surface movement to allocate runway, taxiway and apron for each aircraft while minimizing total cost of the surface network system.
{"title":"Integrated Runway-Taxiway-Apron Allocation for Aircraft Movement Based on Traffic Characteristics","authors":"Sixu Feng, Ji-Xin Liu, Xiaohong Zeng","doi":"10.1109/QR2MSE46217.2019.9021228","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021228","url":null,"abstract":"Severe congestion at airport surface has now become a major challenge in air traffic management. Earlier work on congestion mitigation for traffic on airport surface has made primary contributions on efficiency improvement from the view of resource assignment, so as to enlarge the current resource utility. However, subject to the complexity of modeling and unacceptable computational cost, integrated runway-taxiway-apron allocation for aircraft was rarely reported.This paper introduces a macroscopic view on flow characteristics of airport surface traffic, breaking through the traditional perspective of independent optimization of runway, taxiway and apron operations, in order to adapt the road traffic assignment method to airport surface movement to allocate runway, taxiway and apron for each aircraft while minimizing total cost of the surface network system.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127603686","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 : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021185
Kunpeng Bi, Na Tang, Guo-hui Yan, Hong-yuan Zhang, Yanpeng Feng
Exact prediction of condition based maintenance intervals can provide evidence that equipment support personnel draft maintenance plan, which in favor of enhance army combat readiness level and availability. Since it is difficult to construct a precise model for predicting the equipment failure intervals, a predicting method based on grey synthetic model was proposed to improve the accuracy of failure intervals prediction. Firstly, according to characteristic of less sample and poor data of certain type equipment failure intervals, the failure’s stages and properties were simplified and reasonable modeling background was formed. Then gray mode and Gray-Marko synthetic model were respectively built up to estimate the equipment failure intervals. Finally, the error between predictive value and true value was acquired and the time of the next failure was basically determined based on the predictive value. The case demonstrated that in the case of limited sample data, it is feasible and effective to reduce the predicting error and improve the predict precision by selecting gray synthetic predicting model adaptable to the predicted data attributes according to the characteristics of different fault phases. The predicting results can be used by equipment support crew for making scientific maintenance plan, which can be benefit to maintain equipment availability rate.
{"title":"Research on Certain Type Equipment Failure Intervals Forecasting Based on Gray-Markov Model","authors":"Kunpeng Bi, Na Tang, Guo-hui Yan, Hong-yuan Zhang, Yanpeng Feng","doi":"10.1109/QR2MSE46217.2019.9021185","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021185","url":null,"abstract":"Exact prediction of condition based maintenance intervals can provide evidence that equipment support personnel draft maintenance plan, which in favor of enhance army combat readiness level and availability. Since it is difficult to construct a precise model for predicting the equipment failure intervals, a predicting method based on grey synthetic model was proposed to improve the accuracy of failure intervals prediction. Firstly, according to characteristic of less sample and poor data of certain type equipment failure intervals, the failure’s stages and properties were simplified and reasonable modeling background was formed. Then gray mode and Gray-Marko synthetic model were respectively built up to estimate the equipment failure intervals. Finally, the error between predictive value and true value was acquired and the time of the next failure was basically determined based on the predictive value. The case demonstrated that in the case of limited sample data, it is feasible and effective to reduce the predicting error and improve the predict precision by selecting gray synthetic predicting model adaptable to the predicted data attributes according to the characteristics of different fault phases. The predicting results can be used by equipment support crew for making scientific maintenance plan, which can be benefit to maintain equipment availability rate.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128536334","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 : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021188
Jie Tang, Zhen‐Guo Yang
In this paper, a failure case of the smartphones with an internationally renowned brand has been reported. In detail, after this batch of smartphones have been launched to the market, they encounter with the problems of scrambling display or no display frequently, and therefore have to be recalled and cause economic losses as high as nearly 4 million dollars. Through the preliminary analysis, the printed circuit board assembly (PCBA) has been determined as the faulty component. But what is the root cause and which process has the causes occur in should be further clarified, i.e., in the manufacturing of the printed circuit board (PCB) or in the assembling of PCBA? In this context, comprehensive failure analysis has been performed on the PCBA and PCB of the failed smartphones. Based on the results, the root causes of this failure have been determined, the failure mechanisms have been discussed and the pertinent countermeasures have also been proposed.
{"title":"Root Causes Analysis on Malfunction of PCBA in Smartphone","authors":"Jie Tang, Zhen‐Guo Yang","doi":"10.1109/QR2MSE46217.2019.9021188","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021188","url":null,"abstract":"In this paper, a failure case of the smartphones with an internationally renowned brand has been reported. In detail, after this batch of smartphones have been launched to the market, they encounter with the problems of scrambling display or no display frequently, and therefore have to be recalled and cause economic losses as high as nearly 4 million dollars. Through the preliminary analysis, the printed circuit board assembly (PCBA) has been determined as the faulty component. But what is the root cause and which process has the causes occur in should be further clarified, i.e., in the manufacturing of the printed circuit board (PCB) or in the assembling of PCBA? In this context, comprehensive failure analysis has been performed on the PCBA and PCB of the failed smartphones. Based on the results, the root causes of this failure have been determined, the failure mechanisms have been discussed and the pertinent countermeasures have also been proposed.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124721219","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}
In order to study the influence of the dimension error of the connecting rod and the angular deviation of the joint on the end-path accuracy of the series robot, the Denavit-Hartenberg(D-H) method is used to establish the reliability model of the end-path accuracy of the robot. Considering that the exact probability distribution of some variables is difficult to obtain and there is cognitive uncertainty, a hybrid non-probability model combining probability-box model and traditional probability model is proposed to analyze the end-path accuracy of series robot. Combined with the quasi-Monte Carlo method and nested interval analysis, the quasi interval Monte Carlo method is proposed to analyze the hybrid reliability model. The case application shows that the proposed method converges faster than the traditional Monte Carlo method, requires less computing resources, and the established model is closer to engineering practice.
{"title":"Reliability Analysis of Path Accuracy of Series Robot Based on QuasiInterval Monte Carlo Method","authors":"Guofa Li, Zequan Chen, Chuanhai Chen, Jialong He, Tongtong Jin, Zhaojun Yang, Xuezhen Chen","doi":"10.1109/QR2MSE46217.2019.9021239","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021239","url":null,"abstract":"In order to study the influence of the dimension error of the connecting rod and the angular deviation of the joint on the end-path accuracy of the series robot, the Denavit-Hartenberg(D-H) method is used to establish the reliability model of the end-path accuracy of the robot. Considering that the exact probability distribution of some variables is difficult to obtain and there is cognitive uncertainty, a hybrid non-probability model combining probability-box model and traditional probability model is proposed to analyze the end-path accuracy of series robot. Combined with the quasi-Monte Carlo method and nested interval analysis, the quasi interval Monte Carlo method is proposed to analyze the hybrid reliability model. The case application shows that the proposed method converges faster than the traditional Monte Carlo method, requires less computing resources, and the established model is closer to engineering practice.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"22 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121849371","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 : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021230
Meijuan Xu, Kang Chen, H. Bai, Shicheng Yang
For harsh working environment, low temperature cofired ceramics (LTCC) substrates applied to aerospace are required to have high reliability and stability. To meet this demands, reliability evaluation methods of space application LTCC substrates are studied in this paper. We designed a series of methods and an appropriate procedure to evaluate space application LTCC substrates, in materials, metal film, metallized via and other aspects, which can provide technical guidance for the manufacturing and evaluation of LTCC substrates for spacecraft.
{"title":"Study on Reliability Evaluation of LTCC Substrate for Aerospace Application","authors":"Meijuan Xu, Kang Chen, H. Bai, Shicheng Yang","doi":"10.1109/QR2MSE46217.2019.9021230","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021230","url":null,"abstract":"For harsh working environment, low temperature cofired ceramics (LTCC) substrates applied to aerospace are required to have high reliability and stability. To meet this demands, reliability evaluation methods of space application LTCC substrates are studied in this paper. We designed a series of methods and an appropriate procedure to evaluate space application LTCC substrates, in materials, metal film, metallized via and other aspects, which can provide technical guidance for the manufacturing and evaluation of LTCC substrates for spacecraft.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"390 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115982354","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：