Pub Date : 2016-07-18DOI: 10.1109/ICMAE.2016.7549523
Hyung-Seop Han, H. Seok, Yu-Chan Kim
The purpose of this study was to investigate the fatigue life of an endosseous root-form dental implant using finite element analysis. A conventional Brånemark dental implant system was redesigned to utilize the biocompatible, lightweight magnesium alloy which promotes bone growth. ANSYS Workbench 11.0 was used to generate a three-dimensional mesh of a model created with the actual size specifications. Regulations and schematic of test set-up from ISO 14801 - “Fatigue test for endosseous dental implants” were strictly followed to simulate the fatigue test. To validate the credibility of calculated fatigue life, actual prototypes were built with the design specifications and tested using Material Test System 810. Result of finite element analysis displayed a close approximation of experimental fatigue behavior both displaying that the proposed implant would achieve a fatigue limit of 5 × 106 cycle suggested by the ISO at 150 N. The main advantage of performed computer simulations is that it is fast, efficient and cheap. A comparison of the calculated fatigue life with experimental fatigue life data displayed the accuracy and reliability of the computer simulation method.
{"title":"Finite element analysis of newly developed endosseous root-form dental implant utilizing biodegradable magnesium alloy","authors":"Hyung-Seop Han, H. Seok, Yu-Chan Kim","doi":"10.1109/ICMAE.2016.7549523","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549523","url":null,"abstract":"The purpose of this study was to investigate the fatigue life of an endosseous root-form dental implant using finite element analysis. A conventional Brånemark dental implant system was redesigned to utilize the biocompatible, lightweight magnesium alloy which promotes bone growth. ANSYS Workbench 11.0 was used to generate a three-dimensional mesh of a model created with the actual size specifications. Regulations and schematic of test set-up from ISO 14801 - “Fatigue test for endosseous dental implants” were strictly followed to simulate the fatigue test. To validate the credibility of calculated fatigue life, actual prototypes were built with the design specifications and tested using Material Test System 810. Result of finite element analysis displayed a close approximation of experimental fatigue behavior both displaying that the proposed implant would achieve a fatigue limit of 5 × 106 cycle suggested by the ISO at 150 N. The main advantage of performed computer simulations is that it is fast, efficient and cheap. A comparison of the calculated fatigue life with experimental fatigue life data displayed the accuracy and reliability of the computer simulation method.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"2 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":"128833769","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.2016.7549594
N. Chandra, N. Raghavendra, G. L. Shekar
Indian aerospace industry is on the threshold of a whopping growth, provided the policy makers and the indigenous industry rise up to the challenge. This paper takes stock of the current scenario of the industry in India and carries out SWOT analysis to bring out the major challenges and future prospects for the Indian aerospace industry. The major deciding factors appear to be encouragement of more FDI in the sector, policy reforms, and increased support to SMEs in terms of better access to finance and technology transfer, and huge investment for improving infrastructure to ease pressure on the supply chain.
{"title":"Aerospace industry of India: Analysis of strengths, weaknesses, opportunities and threats","authors":"N. Chandra, N. Raghavendra, G. L. Shekar","doi":"10.1109/ICMAE.2016.7549594","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549594","url":null,"abstract":"Indian aerospace industry is on the threshold of a whopping growth, provided the policy makers and the indigenous industry rise up to the challenge. This paper takes stock of the current scenario of the industry in India and carries out SWOT analysis to bring out the major challenges and future prospects for the Indian aerospace industry. The major deciding factors appear to be encouragement of more FDI in the sector, policy reforms, and increased support to SMEs in terms of better access to finance and technology transfer, and huge investment for improving infrastructure to ease pressure on the supply chain.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"87 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":"116084519","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.2016.7549612
Jianing Song, Guodong Xu, Zhendong Xu
To reduce the measurement noise and the correlation between the process and measurement noises caused by time-differenced measurement, we study an X-ray pulsar navigation method using phase-differenced measurement, which calculates phases of pulsar signal in frequency domain and is more accurate than time-differenced measurement. A modified Kalman filter based on augmentation state is proposed to solve the issue of the correlation. The simulation results show that the proposed method can not only reduce the system biases but also solve the correlation of the process noise with the measurement noises effectively.
{"title":"A modified Kalman filter based on augmentation state for X-ray pulsar phase-differenced measurement","authors":"Jianing Song, Guodong Xu, Zhendong Xu","doi":"10.1109/ICMAE.2016.7549612","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549612","url":null,"abstract":"To reduce the measurement noise and the correlation between the process and measurement noises caused by time-differenced measurement, we study an X-ray pulsar navigation method using phase-differenced measurement, which calculates phases of pulsar signal in frequency domain and is more accurate than time-differenced measurement. A modified Kalman filter based on augmentation state is proposed to solve the issue of the correlation. The simulation results show that the proposed method can not only reduce the system biases but also solve the correlation of the process noise with the measurement noises effectively.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"15 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":"117196943","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.2016.7549584
Li Zhaoran, Hong Yan-ji, Wang Guangyu, Qu Dongsheng
Aiming at the measurement problem of aero-or aerospace engines combustion flow field temperature section distribution using 2-dimensional reconstruction technique, tunable diode laser absorption spectroscopy based on algebraic reconstruction technique is developed. The traditional ART iterative algorithm is perfected by adding a modify factor to relaxation parameter and some prior information such as nonnegative constraint and smoothness factor. The impact of the discrete distribution model on the reconstruction measurement result is analyzed in the ways of simulation and experimental research. Beam number threshold l for different discrete distribution models is put forwarded to provide guidance for the practical application on the engine diagnosis and assessment.
{"title":"Study on the influence of discrete distribution model on gas temperature 2-dimensional reconstruction measurement","authors":"Li Zhaoran, Hong Yan-ji, Wang Guangyu, Qu Dongsheng","doi":"10.1109/ICMAE.2016.7549584","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549584","url":null,"abstract":"Aiming at the measurement problem of aero-or aerospace engines combustion flow field temperature section distribution using 2-dimensional reconstruction technique, tunable diode laser absorption spectroscopy based on algebraic reconstruction technique is developed. The traditional ART iterative algorithm is perfected by adding a modify factor to relaxation parameter and some prior information such as nonnegative constraint and smoothness factor. The impact of the discrete distribution model on the reconstruction measurement result is analyzed in the ways of simulation and experimental research. Beam number threshold l for different discrete distribution models is put forwarded to provide guidance for the practical application on the engine diagnosis and assessment.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"46 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":"121509326","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.2016.7549558
P. Nguyen, D. T. Tran, K. Mori, T. K. D. Hoang, M. Do
Effects of turbulent flow to dynamic characteristic of high sweep-back angle Delta wing were performed by numerical (SIM) and experiment (EXP) method in subsonic flow. The numerical method was based on CFD methods using ANSYS/FLUENT software, while experiment method was conducted in low speed wind tunnel (Mach number M=0.1). At low Reynolds number, air velocity 2.5m/s, the Delta wing was investigated with attack angle of 20 degree within four cases of turbulence intensity, which varied from 0.5% to 15% due to parameter of grid. Decay of turbulence intensity with and without grid was considered. Change of dynamic characteristic of Delta wing caused by different change of turbulence intensity at inlet flow was also observed. Finally, distribution of pressure on Delta wing were measured and calculated; and then interaction between turbulent flow and vortex on upper wing was clarified.
{"title":"Turbulent flow effects on high sweep-back angle delta wing at low reynolds number","authors":"P. Nguyen, D. T. Tran, K. Mori, T. K. D. Hoang, M. Do","doi":"10.1109/ICMAE.2016.7549558","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549558","url":null,"abstract":"Effects of turbulent flow to dynamic characteristic of high sweep-back angle Delta wing were performed by numerical (SIM) and experiment (EXP) method in subsonic flow. The numerical method was based on CFD methods using ANSYS/FLUENT software, while experiment method was conducted in low speed wind tunnel (Mach number M=0.1). At low Reynolds number, air velocity 2.5m/s, the Delta wing was investigated with attack angle of 20 degree within four cases of turbulence intensity, which varied from 0.5% to 15% due to parameter of grid. Decay of turbulence intensity with and without grid was considered. Change of dynamic characteristic of Delta wing caused by different change of turbulence intensity at inlet flow was also observed. Finally, distribution of pressure on Delta wing were measured and calculated; and then interaction between turbulent flow and vortex on upper wing was clarified.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"59 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":"114377158","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.2016.7549567
Jonghyun Yoon, Sung Wook Hwang, J. Bak, J. Park, Sung Young Ko
Cable driven parallel robots (CDPRs) are widely used recently. To achieve accurate and fast tracking performance with CDPRs, suppressing vibration is necessary. Input shaping method that cancels vibration by redesigning input can be used, but usual input shaping method is suit to single-mode systems. Multi-mode input shaping method was suggested to make it apply to multi-mode systems. The multi-mode input shaping method is applied to vibration suppression of 2D over-constrained CDPR with cable stiffness in this paper. Performance of this method is confirmed by simulation results and compared with single-mode input shaping method.
{"title":"Multi-mode input shaping for vibration suppression of over-constrained cable-driven parallel robots with cable stiffness","authors":"Jonghyun Yoon, Sung Wook Hwang, J. Bak, J. Park, Sung Young Ko","doi":"10.1109/ICMAE.2016.7549567","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549567","url":null,"abstract":"Cable driven parallel robots (CDPRs) are widely used recently. To achieve accurate and fast tracking performance with CDPRs, suppressing vibration is necessary. Input shaping method that cancels vibration by redesigning input can be used, but usual input shaping method is suit to single-mode systems. Multi-mode input shaping method was suggested to make it apply to multi-mode systems. The multi-mode input shaping method is applied to vibration suppression of 2D over-constrained CDPR with cable stiffness in this paper. Performance of this method is confirmed by simulation results and compared with single-mode input shaping method.","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":"133433154","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.2016.7549512
Tuğçe Yıldız, A. B. Irez, G. Sur
The present study represents an experimental investigation on machinability of Ti6Al4V titanium alloy by turning method. The effects of coating type (CVD and PVD coating) and cutting tool nose radius on dynamics of machining in particular the resultant cutting force and surface roughness were explored in dry cutting conditions and constant cutting depth. Cutting parameters were selected as two different cutting speed (75, 100 m/min), three different feed rate (0.15, 0.2, 0.25 mm/rev), three different nose radius (0.8, 1.2, 1.6 mm) and two different cementite carbide tool utilized (CVD and PVD coated tools) according to the literature survey and ISO 3685 standard. The components of cutting force (FC, Ff, Fr) on cutting cementite carbide tool were measured by piezo-piezo-electric dynamometer and surface roughness measured by profilometer. It was seen that main cutting force (FC) is the most prominent constituent of the resultant force. In addition, effects of feed rate and cutting speed to the machinability were verified experimentally. Experimental results showed that physical vapor deposition (PVD) coating causes more important resultant force values compared to chemical vapor deposition (CVD) coating for the cutting speeds 75 m/min, 100 m /min and CVD coated cutting tools causes rougher surfaces compared to PVD coated tools for the same cutting speeds. Furthermore, the resultant force decreases while the tool nose radius increases for CVD coated tools and surface roughness decreases while the tool radius increases for both CVD and PVD coated cutting tools.
{"title":"Effect of cementite carbide tool coating type and tool radius on cutting performance","authors":"Tuğçe Yıldız, A. B. Irez, G. Sur","doi":"10.1109/ICMAE.2016.7549512","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549512","url":null,"abstract":"The present study represents an experimental investigation on machinability of Ti6Al4V titanium alloy by turning method. The effects of coating type (CVD and PVD coating) and cutting tool nose radius on dynamics of machining in particular the resultant cutting force and surface roughness were explored in dry cutting conditions and constant cutting depth. Cutting parameters were selected as two different cutting speed (75, 100 m/min), three different feed rate (0.15, 0.2, 0.25 mm/rev), three different nose radius (0.8, 1.2, 1.6 mm) and two different cementite carbide tool utilized (CVD and PVD coated tools) according to the literature survey and ISO 3685 standard. The components of cutting force (FC, Ff, Fr) on cutting cementite carbide tool were measured by piezo-piezo-electric dynamometer and surface roughness measured by profilometer. It was seen that main cutting force (FC) is the most prominent constituent of the resultant force. In addition, effects of feed rate and cutting speed to the machinability were verified experimentally. Experimental results showed that physical vapor deposition (PVD) coating causes more important resultant force values compared to chemical vapor deposition (CVD) coating for the cutting speeds 75 m/min, 100 m /min and CVD coated cutting tools causes rougher surfaces compared to PVD coated tools for the same cutting speeds. Furthermore, the resultant force decreases while the tool nose radius increases for CVD coated tools and surface roughness decreases while the tool radius increases for both CVD and PVD coated cutting tools.","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":"131393972","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.2016.7549544
Ziad Al Sarraf, Joan A. Akrawi
Recently ultrasonic welding technique becomes much more popular process in design and engineering manufacturing, covering a wide range of the application for metals and materials. Although, a wide range of application is increased by this technique. The needed for an optimised horn and improved understanding of the mechanisms of ultrasonic welding remain the primary demands of industry, to resolve several issues that encountered during welding operation. Such as bad tool design, stick of the tool/part, part marking, lack of weld strength and quality. Solving of these issues are related to using perfect tool design and controlled between welding parameters. This work presents an approach to design, simulation and fabrication of an integrated welding device which has been satisfied welding ultrasonically. Then, set up the welding device to improve welding performance and study parameters that influence weld strength and quality.
{"title":"Design, simulation and fabrication of ultrasonic welding device used to improve welding parameters","authors":"Ziad Al Sarraf, Joan A. Akrawi","doi":"10.1109/ICMAE.2016.7549544","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549544","url":null,"abstract":"Recently ultrasonic welding technique becomes much more popular process in design and engineering manufacturing, covering a wide range of the application for metals and materials. Although, a wide range of application is increased by this technique. The needed for an optimised horn and improved understanding of the mechanisms of ultrasonic welding remain the primary demands of industry, to resolve several issues that encountered during welding operation. Such as bad tool design, stick of the tool/part, part marking, lack of weld strength and quality. Solving of these issues are related to using perfect tool design and controlled between welding parameters. This work presents an approach to design, simulation and fabrication of an integrated welding device which has been satisfied welding ultrasonically. Then, set up the welding device to improve welding performance and study parameters that influence weld strength and quality.","PeriodicalId":371629,"journal":{"name":"2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"6 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":"125313942","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.2016.7549588
Akshata Kori, C. Ananda, T. Chandar
Stabilization of gimbal platform housing the payload in Micro Air Vehicle (MAV) applications is crucial in operational situations. The gimbal positioning is achieved through a DC servo motor, which needs to be controlled for the desired performance under uncertainty and disturbance. In this work a novel robust control strategy employing the technique of Uncertainty and Disturbance Estimator (UDE) has been developed. The strategy has been validated through numerical solutions and experimentation. A performance comparison of the proposed strategy with well-known Proportional Integral Derivative (PID) controller has also been accomplished.
{"title":"Robust control of single axis gimbal platform for micro air vehicles based on uncertainty and disturbance estimation","authors":"Akshata Kori, C. Ananda, T. Chandar","doi":"10.1109/ICMAE.2016.7549588","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549588","url":null,"abstract":"Stabilization of gimbal platform housing the payload in Micro Air Vehicle (MAV) applications is crucial in operational situations. The gimbal positioning is achieved through a DC servo motor, which needs to be controlled for the desired performance under uncertainty and disturbance. In this work a novel robust control strategy employing the technique of Uncertainty and Disturbance Estimator (UDE) has been developed. The strategy has been validated through numerical solutions and experimentation. A performance comparison of the proposed strategy with well-known Proportional Integral Derivative (PID) controller has also been accomplished.","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":"125462581","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.2016.7549557
Maya K. Mitkova, A. Ansari, A. Siddiqui
Two-layer Couette flow of a third grade fluid is studied. Optimal Homotopy Asymptotic Method is used to find solutions of coupled nonlinear differential equations governing the motion of two immiscible layers of fluids with equal thickness. The solution expressions are used to model the flow and to illustrate the effect of variable material constants on the fluids' motion.
{"title":"Application of OHAM to Couette flow of a third grade fluid","authors":"Maya K. Mitkova, A. Ansari, A. Siddiqui","doi":"10.1109/ICMAE.2016.7549557","DOIUrl":"https://doi.org/10.1109/ICMAE.2016.7549557","url":null,"abstract":"Two-layer Couette flow of a third grade fluid is studied. Optimal Homotopy Asymptotic Method is used to find solutions of coupled nonlinear differential equations governing the motion of two immiscible layers of fluids with equal thickness. The solution expressions are used to model the flow and to illustrate the effect of variable material constants on the fluids' motion.","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":"129304604","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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