Pub Date : 2016-07-18DOI: 10.1109/ICMAE.2016.7549573
S. Yi, S. Duoqi, Y. Xiaoguang, Huang Fei
Fatigue scatter is an inevitable phenomenon in fatigue tests which influences life prediction for components or system. In aerospace engineering, aircraft and gas turbine engine components are designed based on design curves. To ensure safety and reliability, influence of life and fatigue scatter model uncertainty on design curve construction is analyzed by comparing capability to describe fatigue scatter. Design curve with different models are calculated based on Ti-64 fatigue tests data. In addition, the number of test points is also discussed in this paper. Finally, a new curve design approach based on Bayesian is proposed for small fatigue tests sample, which is more conservative than traditional way.
{"title":"Influence of life and fatigue scatter model uncertainty on design curve construction","authors":"S. Yi, S. Duoqi, Y. Xiaoguang, Huang Fei","doi":"10.1109/ICMAE.2016.7549573","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549573","url":null,"abstract":"Fatigue scatter is an inevitable phenomenon in fatigue tests which influences life prediction for components or system. In aerospace engineering, aircraft and gas turbine engine components are designed based on design curves. To ensure safety and reliability, influence of life and fatigue scatter model uncertainty on design curve construction is analyzed by comparing capability to describe fatigue scatter. Design curve with different models are calculated based on Ti-64 fatigue tests data. In addition, the number of test points is also discussed in this paper. Finally, a new curve design approach based on Bayesian is proposed for small fatigue tests sample, which is more conservative than traditional way.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"434 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122803554","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549509
A. Esmaeili, A. Hamouda
In this study, the effects of developed Intermetallic Compounds (IMCs) and composite-like structure on metallurgical and flexural characteristics of the Friction Stir Welded (FSWed) joints were scrutinized and explored using OM, SEM equipped with EDS, and three-point bending test. Al2Cu was the main developed interfacial IMCs in the sound join; besides existence of a lamellar composite structure within the stir zone. The maximum bending angle was reached beyond 150° without any failure for optimum joint caused by proper mixing of materials. Thinness, continuity, and uniformity were the main observed characteristics of developed IMCs in the sound joint.
{"title":"The role of intermetallic compounds and composite-like structure development during dissimilar friction stir welding of aluminum to brass on metallurgical and flexural characteristics","authors":"A. Esmaeili, A. Hamouda","doi":"10.1109/ICMAE.2016.7549509","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549509","url":null,"abstract":"In this study, the effects of developed Intermetallic Compounds (IMCs) and composite-like structure on metallurgical and flexural characteristics of the Friction Stir Welded (FSWed) joints were scrutinized and explored using OM, SEM equipped with EDS, and three-point bending test. Al2Cu was the main developed interfacial IMCs in the sound join; besides existence of a lamellar composite structure within the stir zone. The maximum bending angle was reached beyond 150° without any failure for optimum joint caused by proper mixing of materials. Thinness, continuity, and uniformity were the main observed characteristics of developed IMCs in the sound joint.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124012561","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549600
Liu Xun, Jie Yuwen, Zhu Liang
AFM operating procedures is essential information for airplane safe operation. During the airplane design and certification, systematic approaches are necessary in the development of AFM operating procedures to ensure its validity and integrity. The related airworthiness regulation and advisory materials requirements of transport category airplane is analyzed, the AFM operating procedure identification approaches are proposed based on the scenario analysis method, the normalization procedure content formation process is provided, the verification requirement for demonstrating compliance with the airworthiness requirement is also analyzed and given.
{"title":"Systematic approaches in the development of AFM operating procedures","authors":"Liu Xun, Jie Yuwen, Zhu Liang","doi":"10.1109/ICMAE.2016.7549600","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549600","url":null,"abstract":"AFM operating procedures is essential information for airplane safe operation. During the airplane design and certification, systematic approaches are necessary in the development of AFM operating procedures to ensure its validity and integrity. The related airworthiness regulation and advisory materials requirements of transport category airplane is analyzed, the AFM operating procedure identification approaches are proposed based on the scenario analysis method, the normalization procedure content formation process is provided, the verification requirement for demonstrating compliance with the airworthiness requirement is also analyzed and given.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126773429","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549565
Ryo Takehana, Hidehiko Paku, K. Uchiyama
In this paper, we describe a driving principle of a spherical reaction wheel system that we developed for a small satellite. A reaction wheel system has been one of the effective method for a satellite attitude control. However, the attitude control system generally becomes huge and heavy. To overcome this problem, a spherical reaction wheel system was proposed. Although, the system has ability to miniaturize an attitude control system, a driving mechanism for a spherical rotor tends to be huge due to difficulty of three dimensional rotation. In a proposed system, small DC motors are used to drive a spherical rotor to realize a small and lightweight attitude control system. We conduct experiments on attitude control of a satellite model with a spherical rotor by applying two-degree-of-freedom controller.
{"title":"Attitude control of satellite with a spherical rotor using two-degree-of-freedom controller","authors":"Ryo Takehana, Hidehiko Paku, K. Uchiyama","doi":"10.1109/ICMAE.2016.7549565","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549565","url":null,"abstract":"In this paper, we describe a driving principle of a spherical reaction wheel system that we developed for a small satellite. A reaction wheel system has been one of the effective method for a satellite attitude control. However, the attitude control system generally becomes huge and heavy. To overcome this problem, a spherical reaction wheel system was proposed. Although, the system has ability to miniaturize an attitude control system, a driving mechanism for a spherical rotor tends to be huge due to difficulty of three dimensional rotation. In a proposed system, small DC motors are used to drive a spherical rotor to realize a small and lightweight attitude control system. We conduct experiments on attitude control of a satellite model with a spherical rotor by applying two-degree-of-freedom controller.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124292344","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549520
P. Podaný, J. Dlouhý, M. Koukolíková, P. Martínek, R. Procházka, T. Kubina, M. Duchek
In the steel industry, research efforts have been mainly focused on high-strength steels recently. These steels find use in both automotive industry and (thanks to reduced weight of structural parts) aircraft industry. New possibilities emerged at the beginning of this century, when the effect of strain-induced transformation of γ phase was attempted to be applied in austenitic steels. Particularly the high manganese steels are extremely ductile austenitic steels characterized by a high rate of work hardening resulting from the generation of deformation-nucleated twins and possibly combined with the deformation induced formation of martensite. Capability of energy absorption is much bigger in comparison with conventional steels. This paper deals with the description of the phase composition of two heats of steel with 15 wt. % of manganese after annealing after cold rolling with 40% reduction of thickness. Various methods of phase analysis have been used: colour etching, EBSD and X-ray diffraction.
{"title":"Phase composition of 15Mn-0.1C-0.4/1.4Al-Si TRIP/TWIP steels after cold rolling and annealing","authors":"P. Podaný, J. Dlouhý, M. Koukolíková, P. Martínek, R. Procházka, T. Kubina, M. Duchek","doi":"10.1109/ICMAE.2016.7549520","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549520","url":null,"abstract":"In the steel industry, research efforts have been mainly focused on high-strength steels recently. These steels find use in both automotive industry and (thanks to reduced weight of structural parts) aircraft industry. New possibilities emerged at the beginning of this century, when the effect of strain-induced transformation of γ phase was attempted to be applied in austenitic steels. Particularly the high manganese steels are extremely ductile austenitic steels characterized by a high rate of work hardening resulting from the generation of deformation-nucleated twins and possibly combined with the deformation induced formation of martensite. Capability of energy absorption is much bigger in comparison with conventional steels. This paper deals with the description of the phase composition of two heats of steel with 15 wt. % of manganese after annealing after cold rolling with 40% reduction of thickness. Various methods of phase analysis have been used: colour etching, EBSD and X-ray diffraction.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128621537","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549589
Z. Shuai, Li Xue-ren, Zhang Peng, Guo Qing
For solving the problem UAV how to choose the planning way when facing pop-up threats, we propose a method to choose base on UAV autonomous level. We adopt multi-factor fuzzy comprehensive evaluation model to evaluate UAV autonomy and set up the autonomy evaluation index model which contains 3 first level indexes that are UAV's planning capacity, the operator working conditions, UAV's threat perception and 9 secondary level indexes that are planning accuracy and so on, according to UAV characteristic and the degree of interaction with the outside. Example is verified and the results prove the correctness of the method we proposed.
{"title":"UAV autonomy evaluation based on multi-factors fuzzy evaluation","authors":"Z. Shuai, Li Xue-ren, Zhang Peng, Guo Qing","doi":"10.1109/ICMAE.2016.7549589","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549589","url":null,"abstract":"For solving the problem UAV how to choose the planning way when facing pop-up threats, we propose a method to choose base on UAV autonomous level. We adopt multi-factor fuzzy comprehensive evaluation model to evaluate UAV autonomy and set up the autonomy evaluation index model which contains 3 first level indexes that are UAV's planning capacity, the operator working conditions, UAV's threat perception and 9 secondary level indexes that are planning accuracy and so on, according to UAV characteristic and the degree of interaction with the outside. Example is verified and the results prove the correctness of the method we proposed.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127733147","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549605
Ju Shengjun, Yan Chao, Ye Zhi-fei
This paper presents the extension of the open source Stanford University Unstructured (SU2) software suite to perform transition prediction simulations, which are caused by either Tollmien-Schlichting streamwise instability or crossflow instability. The integrated equations, γ-Reθt model and γ-Reθt-CF model, solving computational fluid dynamics analysis are coupled with Spalart-Allmaras turbulence model. In order to validate and assess the accuracy of the model in predicting the boundary layer transition, a series of transition flows are simulated including S809 airfoil, 30P30N multi-element airfoil and 6:1 prolate spheroid standard model. The results show the modified SU2 suite can predict transition accurately in various flow conditions such as natural transition and crossflow transition. The capacity and accuracy of the SU2 software suite in the numerical simulation can be greatly enhanced.
{"title":"Integrating stanford university unstructured code with transition model","authors":"Ju Shengjun, Yan Chao, Ye Zhi-fei","doi":"10.1109/ICMAE.2016.7549605","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549605","url":null,"abstract":"This paper presents the extension of the open source Stanford University Unstructured (SU2) software suite to perform transition prediction simulations, which are caused by either Tollmien-Schlichting streamwise instability or crossflow instability. The integrated equations, γ-Reθt model and γ-Reθt-CF model, solving computational fluid dynamics analysis are coupled with Spalart-Allmaras turbulence model. In order to validate and assess the accuracy of the model in predicting the boundary layer transition, a series of transition flows are simulated including S809 airfoil, 30P30N multi-element airfoil and 6:1 prolate spheroid standard model. The results show the modified SU2 suite can predict transition accurately in various flow conditions such as natural transition and crossflow transition. The capacity and accuracy of the SU2 software suite in the numerical simulation can be greatly enhanced.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116477579","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549568
Y. M. Al-Rawashdeh, M. Elshafei, S. El-Ferik
In this paper, a novel approach to estimate a vehicle attitude using gyroscopes and an array of linear tri-axial accelerometers arranged in a certain configuration is presented. This configuration provides direct angular acceleration measurements that will be of great value once the quaternion dynamical equation is solved using Unscented Kalman filter. Various new states and measurements models based on the rotational quaternion are presented. Using this approach, estimating the attitude of a vehicle using linear accelerometers along with gyroscopes enables a completely passive attitude estimation under the simultaneous actions of vehicle varying center of gravity position, unknown varying gravitational field, and an accelerating vehicle without any singularity being involved in the states or measurements models which were not reported in the related literature to the best of authors' knowledge.
{"title":"Passive attitude estimation using gyroscopes and all-accelerometer IMU","authors":"Y. M. Al-Rawashdeh, M. Elshafei, S. El-Ferik","doi":"10.1109/ICMAE.2016.7549568","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549568","url":null,"abstract":"In this paper, a novel approach to estimate a vehicle attitude using gyroscopes and an array of linear tri-axial accelerometers arranged in a certain configuration is presented. This configuration provides direct angular acceleration measurements that will be of great value once the quaternion dynamical equation is solved using Unscented Kalman filter. Various new states and measurements models based on the rotational quaternion are presented. Using this approach, estimating the attitude of a vehicle using linear accelerometers along with gyroscopes enables a completely passive attitude estimation under the simultaneous actions of vehicle varying center of gravity position, unknown varying gravitational field, and an accelerating vehicle without any singularity being involved in the states or measurements models which were not reported in the related literature to the best of authors' knowledge.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127111040","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549545
Xinyong Mao, Quanxin Liu, Bin Li, Hongqi Liu, Lingfeng Yin, Jiangbo Li
With the rapid application of high speed machining, the feed rate of moving parts has an important influence on the dynamics of high speed machine tool. In this paper, a method of modal decoupling of Operational Deflection Shapes (ODS) was proposed to investigate the dynamic behavior of machine tool with respect to different worktable feed rates. Based on this method, the dominant frequencies vibration of the machine tool at different frequencies and its transformation at different worktable feed rates was identified. Finally, a series of empty running experiments were performed under different worktable feed rates. The experimental results show that (i) the change of worktable feed rate will affect the contribution of different modes vibration to the machine tool vibration; (ii) the contribution of a certain mode vibration to the machine tool vibration is different at different worktable feed rates; (iii) with the worktable feed rate increasing, the change rule of dominant frequency vibration participation is from multimode participation to single mode dominant, and then to the multimode participation. This research will provide valuable information for the selection of machine tool operation parameters and the optimization design of machine tool structure.
{"title":"Investigation on the dynamic behavior of machine tool with respect to different worktable feed rates","authors":"Xinyong Mao, Quanxin Liu, Bin Li, Hongqi Liu, Lingfeng Yin, Jiangbo Li","doi":"10.1109/ICMAE.2016.7549545","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549545","url":null,"abstract":"With the rapid application of high speed machining, the feed rate of moving parts has an important influence on the dynamics of high speed machine tool. In this paper, a method of modal decoupling of Operational Deflection Shapes (ODS) was proposed to investigate the dynamic behavior of machine tool with respect to different worktable feed rates. Based on this method, the dominant frequencies vibration of the machine tool at different frequencies and its transformation at different worktable feed rates was identified. Finally, a series of empty running experiments were performed under different worktable feed rates. The experimental results show that (i) the change of worktable feed rate will affect the contribution of different modes vibration to the machine tool vibration; (ii) the contribution of a certain mode vibration to the machine tool vibration is different at different worktable feed rates; (iii) with the worktable feed rate increasing, the change rule of dominant frequency vibration participation is from multimode participation to single mode dominant, and then to the multimode participation. This research will provide valuable information for the selection of machine tool operation parameters and the optimization design of machine tool structure.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"25 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120860724","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 : 2016-07-18DOI: 10.1109/ICMAE.2016.7549527
Rui Ma, Yu‐Ting Wu, C. Du, Xia Chen, De-lou Zhang, Chong-fang Ma
Vapor compression heat pump has good prospects in future large-scale spacecraft thermal control technology. Compressor is a key component in vapor compression heat pump. It is essential to study its adaptability under micro-gravity. In this paper, an experimental system was built up to test the performance of inverted compressor subjected to micro-gravity. The performance of compressor upright and inverted was compared. The influence of compressor speed on the performance of vapor compression heat pump was investigated. The results showed that the inverted compressor could be considered gravity-independent because of normal operation. Compressor discharge temperature and power increased with compressor speed. However, the COP(Coefficient of Performance) was less than that of compressor upright. The maximum COP obtained with upright and inverted compressor were 8.4 and 7.6, respectively. The experiment subject to micro-gravity of vapor compressor heat pump provides an experimental basis and lays foundation for future space applications.
{"title":"Comparative study of impact of compressor speed on system performance subject to micro-gravity","authors":"Rui Ma, Yu‐Ting Wu, C. Du, Xia Chen, De-lou Zhang, Chong-fang Ma","doi":"10.1109/ICMAE.2016.7549527","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549527","url":null,"abstract":"Vapor compression heat pump has good prospects in future large-scale spacecraft thermal control technology. Compressor is a key component in vapor compression heat pump. It is essential to study its adaptability under micro-gravity. In this paper, an experimental system was built up to test the performance of inverted compressor subjected to micro-gravity. The performance of compressor upright and inverted was compared. The influence of compressor speed on the performance of vapor compression heat pump was investigated. The results showed that the inverted compressor could be considered gravity-independent because of normal operation. Compressor discharge temperature and power increased with compressor speed. However, the COP(Coefficient of Performance) was less than that of compressor upright. The maximum COP obtained with upright and inverted compressor were 8.4 and 7.6, respectively. The experiment subject to micro-gravity of vapor compressor heat pump provides an experimental basis and lays foundation for future space applications.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128406686","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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