Pub Date : 2019-08-01DOI: 10.1109/QR2MSE46217.2019.9021205
Feng Zhou, Xin Tian, L. Tian
Considering the complexity of the working conditions of the rescue manipulator arm and the safety of the rescue requirements, the structural reliability of the quick coupler that is important connecting component of the rescue manipulator arm is studied. Based on the stress-strength interference theory, a mathematical model of reliability analysis is established. The parameterized model of the key structure belonging to the quick coupler is established by using the APDL language. The randomness of variables such as critical dimensions, elastic modulus and load is fully considered. Using the PDS module of ANSYS, the Monte Carlo method is used to analyze the reliability of the key structure of the quick coupler. The stress probability distribution characteristics of the finite element analysis model are obtained. The research results are of great significance for verifying the rationality of the structural design of the quick coupler.
{"title":"Reliability Analysis of Quick Coupler Attached to Rescue Manipulator Arm","authors":"Feng Zhou, Xin Tian, L. Tian","doi":"10.1109/QR2MSE46217.2019.9021205","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021205","url":null,"abstract":"Considering the complexity of the working conditions of the rescue manipulator arm and the safety of the rescue requirements, the structural reliability of the quick coupler that is important connecting component of the rescue manipulator arm is studied. Based on the stress-strength interference theory, a mathematical model of reliability analysis is established. The parameterized model of the key structure belonging to the quick coupler is established by using the APDL language. The randomness of variables such as critical dimensions, elastic modulus and load is fully considered. Using the PDS module of ANSYS, the Monte Carlo method is used to analyze the reliability of the key structure of the quick coupler. The stress probability distribution characteristics of the finite element analysis model are obtained. The research results are of great significance for verifying the rationality of the structural design of the quick coupler.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"43 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":"131441300","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/QR2MSE46217.2019.9021203
Xiaokai Huang, Shouqing Huang, Huiming Zheng, Shouwen Liu
In the process of using space bearing, there are some problems such as the difficulty in identifying reliability characteristics, and the lack of fault diagnosis methods. Firstly, based on the reliability enhancement test principle, the temperature stress step test under standard atmospheric pressure and the vacuum degree step test at the use temperature are designed, and a space bearing test system that meets the control and measurement requirements is constructed. Then, after collection of the vibration response data under the condition of 0r/min and 1000r/min rotation speed, the wavelet energy spectrum of time-frequency data, which is the reliability characteristics, are identified using EEMD algorithm for data fusion and de-noising to study the fault state that reliability characteristics change with stress. Next, with the vibration response data of different running moments, data fusion de-noising and amplitude feature extraction are carried based on Hilbert transform. By obtaining the energy distribution of amplitude features in different frequency segments by fast Fourier transform, which is the reliability characteristic, the fault state of reliability characteristics over time is studied. Finally, through the simulation analysis, the mechanism and law of the corresponding fault state are identified, and the diagnostic relationship between the fault state and the simulation mechanism identified by the test is established, which can provide support to the on-orbit health monitoring and fault management.
{"title":"Research on Reliability Identification and Fault Diagnosis Technology of Space Bearings","authors":"Xiaokai Huang, Shouqing Huang, Huiming Zheng, Shouwen Liu","doi":"10.1109/QR2MSE46217.2019.9021203","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021203","url":null,"abstract":"In the process of using space bearing, there are some problems such as the difficulty in identifying reliability characteristics, and the lack of fault diagnosis methods. Firstly, based on the reliability enhancement test principle, the temperature stress step test under standard atmospheric pressure and the vacuum degree step test at the use temperature are designed, and a space bearing test system that meets the control and measurement requirements is constructed. Then, after collection of the vibration response data under the condition of 0r/min and 1000r/min rotation speed, the wavelet energy spectrum of time-frequency data, which is the reliability characteristics, are identified using EEMD algorithm for data fusion and de-noising to study the fault state that reliability characteristics change with stress. Next, with the vibration response data of different running moments, data fusion de-noising and amplitude feature extraction are carried based on Hilbert transform. By obtaining the energy distribution of amplitude features in different frequency segments by fast Fourier transform, which is the reliability characteristic, the fault state of reliability characteristics over time is studied. Finally, through the simulation analysis, the mechanism and law of the corresponding fault state are identified, and the diagnostic relationship between the fault state and the simulation mechanism identified by the test is established, which can provide support to the on-orbit health monitoring and fault management.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"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":"128918991","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/QR2MSE46217.2019.9021146
Kai Liu, Congmin Lv, W. Dang, Peng Li, Tianji Zou, Min-Cheng Xin
Space electronic products usually have to meet the requirements of high reliability and long lifetime, and it is hard to obtain sufficient reliability data in the general accelerated testing. Highly accelerated life testing (HALT) and highly accelerated stress screening (HASS) can be used to improve the reliability of long lifetime products; however, they are mainly applied in qualitative method. This paper integrated degradation analysis as a quantitative assessment method after HALT and HASS. A method based on the integration of HALT, HASS and accelerated degradation testing (ADT) (HHA) is proposed. Firstly, the basic framework of HHA is developed based on the three accelerated testing methods. Secondly, the HHA model and degradation data model are researched. Lastly, a case study was performed on solid state drives (SSDs). Research shows that the HHA method is effective and could be applied in the space electronic products.
{"title":"An Integrated Method of HALT-HASS-ADT for Space Electronic Products","authors":"Kai Liu, Congmin Lv, W. Dang, Peng Li, Tianji Zou, Min-Cheng Xin","doi":"10.1109/QR2MSE46217.2019.9021146","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021146","url":null,"abstract":"Space electronic products usually have to meet the requirements of high reliability and long lifetime, and it is hard to obtain sufficient reliability data in the general accelerated testing. Highly accelerated life testing (HALT) and highly accelerated stress screening (HASS) can be used to improve the reliability of long lifetime products; however, they are mainly applied in qualitative method. This paper integrated degradation analysis as a quantitative assessment method after HALT and HASS. A method based on the integration of HALT, HASS and accelerated degradation testing (ADT) (HHA) is proposed. Firstly, the basic framework of HHA is developed based on the three accelerated testing methods. Secondly, the HHA model and degradation data model are researched. Lastly, a case study was performed on solid state drives (SSDs). Research shows that the HHA method is effective and could be applied in the space electronic products.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"15 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":"117059532","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/QR2MSE46217.2019.9021123
Jianwei Yang, Yuqing Yang, Jinhai Wang, Ran Sun, Xinghui Qiu
Traction inverter is one of the most important part of traction drive system in the train, and the reliability of the traction inverter affects the normal operation of the entire train directly. In this paper operated the accelerated test on IGBT module of TNG15 type traction inverters in the Beijing metro firstly. Then calculated the failure rate of IGBT module through Arrhenius model, for the coupling element, used small-sample method of reliability evaluation to calculate the failure rate of it. Combined with the reliability parameters of other electronic components in the traction inverters, the qualitative analysis and did the quantitative analysis of traction inverter system through GO methodology. GO method is widely used in the defense industry and other large systems, but it is rarely involved in the small systems. This paper provides a method for the reliability assessment of traction inverter, and it provides an idea for the reliability assessment of the other converter components in the train traction transmission system.
{"title":"Reliability Evaluation of TGN15 Type IGBT Traction Inverter for Beijing Metro","authors":"Jianwei Yang, Yuqing Yang, Jinhai Wang, Ran Sun, Xinghui Qiu","doi":"10.1109/QR2MSE46217.2019.9021123","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021123","url":null,"abstract":"Traction inverter is one of the most important part of traction drive system in the train, and the reliability of the traction inverter affects the normal operation of the entire train directly. In this paper operated the accelerated test on IGBT module of TNG15 type traction inverters in the Beijing metro firstly. Then calculated the failure rate of IGBT module through Arrhenius model, for the coupling element, used small-sample method of reliability evaluation to calculate the failure rate of it. Combined with the reliability parameters of other electronic components in the traction inverters, the qualitative analysis and did the quantitative analysis of traction inverter system through GO methodology. GO method is widely used in the defense industry and other large systems, but it is rarely involved in the small systems. This paper provides a method for the reliability assessment of traction inverter, and it provides an idea for the reliability assessment of the other converter components in the train traction transmission system.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"29 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":"115490004","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/QR2MSE46217.2019.9021174
Shengli Zhu, Cheng Feng, T. Yu, X. Zhuang
The gear and rack are of significant importance to the operation of the slat. Its performance influences has a significant influence on the safety of an aircraft. The durability of the gear and rack in a slat mechanism is investigated in this paper. A method is presented for the compilation of load spectrum of the aircraft slat mechanism in a flight cycle. The rigid-flex dynamic model of a slat mechanism is built to get the load history of the gear and rack in a flight cycle, considering the deformation of the wing. A flex-flex gear and rack dynamic model is established, and the dynamic contact stress is researched, as the traditional static or quasi-static finite element analysis is not accurate in predicting the meshing force. Durability analysis is made with nominal stress method. The result showed that the damageable positions of the gear are the tooth root and the tooth surface, besides the rack is a life-cycle part.
{"title":"Durability Analysis of the Gear-Rack of a Slat Mechanism","authors":"Shengli Zhu, Cheng Feng, T. Yu, X. Zhuang","doi":"10.1109/QR2MSE46217.2019.9021174","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021174","url":null,"abstract":"The gear and rack are of significant importance to the operation of the slat. Its performance influences has a significant influence on the safety of an aircraft. The durability of the gear and rack in a slat mechanism is investigated in this paper. A method is presented for the compilation of load spectrum of the aircraft slat mechanism in a flight cycle. The rigid-flex dynamic model of a slat mechanism is built to get the load history of the gear and rack in a flight cycle, considering the deformation of the wing. A flex-flex gear and rack dynamic model is established, and the dynamic contact stress is researched, as the traditional static or quasi-static finite element analysis is not accurate in predicting the meshing force. Durability analysis is made with nominal stress method. The result showed that the damageable positions of the gear are the tooth root and the tooth surface, besides the rack is a life-cycle part.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"19 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":"122659537","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}
Program loading spectrum is a prerequisite for carrying out reliability test, and it is also an objective basis for reliability design. In the actual cutting process, the Computer numerical control (CNC) lathe’s feed system mainly bears both the feed speed and the friction load. Therefore, this paper establishes a two-dimensional program loading spectrum of reliability test for CNC lathe’s feed system based on two-dimensional kernel function. First, the relationship between the frictional force in each feeding direction for CNC lathe and the three-axis cutting force is determined. Second, the kernel function is used to fit the load distribution in each feeding direction for CNC lathe, and the maximum likelihood estimation method is used to estimate the function parameters. Thirdly, the expansion factor method is used to extrapolate the load spectrum, and the load spectrum is divided into 8 levels. Finally, the loading spectrum in different feed directions for CNC lathe is compiled. In this paper, the loading spectrum and corresponding relative friction force of the HTC 40100 CNC lathe is established. This two-dimensional program loading spectrum can be applied to the reliability test and life prediction of feed system, which has important engineering application value.
{"title":"Compilation of Program Loading Spectrum for CNC Lathe’s Feed System Based on Two-dimensional Kernel Function","authors":"Guofa Li, Hongxiang Zhu, Xinge Zhang, Jialong He, Xinyue Zhao","doi":"10.1109/QR2MSE46217.2019.9021196","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021196","url":null,"abstract":"Program loading spectrum is a prerequisite for carrying out reliability test, and it is also an objective basis for reliability design. In the actual cutting process, the Computer numerical control (CNC) lathe’s feed system mainly bears both the feed speed and the friction load. Therefore, this paper establishes a two-dimensional program loading spectrum of reliability test for CNC lathe’s feed system based on two-dimensional kernel function. First, the relationship between the frictional force in each feeding direction for CNC lathe and the three-axis cutting force is determined. Second, the kernel function is used to fit the load distribution in each feeding direction for CNC lathe, and the maximum likelihood estimation method is used to estimate the function parameters. Thirdly, the expansion factor method is used to extrapolate the load spectrum, and the load spectrum is divided into 8 levels. Finally, the loading spectrum in different feed directions for CNC lathe is compiled. In this paper, the loading spectrum and corresponding relative friction force of the HTC 40100 CNC lathe is established. This two-dimensional program loading spectrum can be applied to the reliability test and life prediction of feed system, which has important engineering application value.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"17 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":"121738153","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/QR2MSE46217.2019.9021173
S. Liang, Haibin Li, Lixin Gao
In order to find the distribution characteristics of low frequency signals and probability density before the Alashan M5.8 earthquake on April 15, 2015 in Inner Mongolia, the waveform data of three stations (from 00 points on April 1, 2015 to 23 points on April 15, 2015) were analyzed by using the continuous digital seismic waveform data of Wuhai, Shizuishan and Dongshengmiao stations. At the same time, the frequency and probability density distributions of the spectrum anomaly period are also tracked. The results show that: (1) The probability density distributions of seismic waveforms recorded by the three stations with and without seismic time periods are completely different, and the distribution of probability density with time change has the character of generalized Gaussian distribution. (2) Before the Azuoqi M5.8 Earthquake, the seismic waveforms recorded at Wuhai, Shizuishan and Dongshengmiao seismic stations near the epicenter not only exhibited the phenomenon of frequency shift to low frequency, but also changed the distribution of frequency and probability density in the corresponding period of abnormal occurrence. However, in the same period, the change patterns of the three stations were similar, and the probability density was divided into two parts. The distribution of probability density varies greatly in different time periods.
{"title":"Discrimination of Probability Distribution and Low Frequency Anomaly of Seismic Wave Data","authors":"S. Liang, Haibin Li, Lixin Gao","doi":"10.1109/QR2MSE46217.2019.9021173","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021173","url":null,"abstract":"In order to find the distribution characteristics of low frequency signals and probability density before the Alashan M5.8 earthquake on April 15, 2015 in Inner Mongolia, the waveform data of three stations (from 00 points on April 1, 2015 to 23 points on April 15, 2015) were analyzed by using the continuous digital seismic waveform data of Wuhai, Shizuishan and Dongshengmiao stations. At the same time, the frequency and probability density distributions of the spectrum anomaly period are also tracked. The results show that: (1) The probability density distributions of seismic waveforms recorded by the three stations with and without seismic time periods are completely different, and the distribution of probability density with time change has the character of generalized Gaussian distribution. (2) Before the Azuoqi M5.8 Earthquake, the seismic waveforms recorded at Wuhai, Shizuishan and Dongshengmiao seismic stations near the epicenter not only exhibited the phenomenon of frequency shift to low frequency, but also changed the distribution of frequency and probability density in the corresponding period of abnormal occurrence. However, in the same period, the change patterns of the three stations were similar, and the probability density was divided into two parts. The distribution of probability density varies greatly in different time periods.","PeriodicalId":233855,"journal":{"name":"2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)","volume":"75 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":"126279288","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/QR2MSE46217.2019.9021248
Xuelong Xu, Chunyong Han, E. Shao, Xianghong Lu, Wenxiao Fang, Rongquan Chen, Hengzhou Liu, Weiheng Shao, Yun-lei Shi
In this paper, HPM is used as the source of interference to affect the working state of an integrated circuit. The effect of the injected power and the orientation of the studied integrated circuit (FPGA) is investigated. In the experiment, it is found that the induced voltage of the I/O pin can reach 70.3 V under the electromagnetic field high to 1257.44 V/m. In spite of this, the working state of the FPGA remained normal.
{"title":"Study of the HPM Interference Effect on Integrated Circuit in a TEM Cell","authors":"Xuelong Xu, Chunyong Han, E. Shao, Xianghong Lu, Wenxiao Fang, Rongquan Chen, Hengzhou Liu, Weiheng Shao, Yun-lei Shi","doi":"10.1109/QR2MSE46217.2019.9021248","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021248","url":null,"abstract":"In this paper, HPM is used as the source of interference to affect the working state of an integrated circuit. The effect of the injected power and the orientation of the studied integrated circuit (FPGA) is investigated. In the experiment, it is found that the induced voltage of the I/O pin can reach 70.3 V under the electromagnetic field high to 1257.44 V/m. In spite of this, the working state of the FPGA remained normal.","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":"128278694","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/QR2MSE46217.2019.9021213
Yun-An Zhang, Tao Liu, Ping Shu, Guanghan Bai, J. Tao
In this paper, an improved state space decomposition (SSD for short) method is proposed to evaluate the reliability of multistate networks with all the minimal path vectors (d-MPs for short). Existing SSD methods all select a proper d-MP which minimizes the value of a given function. When there is a tie during the process, the tie is broken arbitrarily. However, we find that different d-MPs with same function value affect the efficiency of the decomposition procedure, which ultimately lead to different computation times. We introduce a heuristic method called Rl to select d-MP when there is a tie. The results of comparative experiments show that the proposed heuristic method can significantly enhance the efficiency of current SSD algorithm for reliability evaluation of multistate networks.
{"title":"An Improved State-Space Decomposition Method for Reliability Evaluation of Multistate Networks","authors":"Yun-An Zhang, Tao Liu, Ping Shu, Guanghan Bai, J. Tao","doi":"10.1109/QR2MSE46217.2019.9021213","DOIUrl":"https://doi.org/10.1109/QR2MSE46217.2019.9021213","url":null,"abstract":"In this paper, an improved state space decomposition (SSD for short) method is proposed to evaluate the reliability of multistate networks with all the minimal path vectors (d-MPs for short). Existing SSD methods all select a proper d-MP which minimizes the value of a given function. When there is a tie during the process, the tie is broken arbitrarily. However, we find that different d-MPs with same function value affect the efficiency of the decomposition procedure, which ultimately lead to different computation times. We introduce a heuristic method called Rl to select d-MP when there is a tie. The results of comparative experiments show that the proposed heuristic method can significantly enhance the efficiency of current SSD algorithm for reliability evaluation of multistate networks.","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":"130502298","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}
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