Pub Date : 2020-04-01DOI: 10.1109/IRASET48871.2020.9092178
Mouad Bounouar, Richard Béarée, A. Siadat, Nathalie Klement, Tahar‐Hakim Benchekroun
Collaborative robots (cobots) are presented as a way of business competitiveness by combining human skills with robotic advantages. The place of human operators in this context is the subject of much discussion. Including his role, his safety and his security. This study presents a methodological contribution for the management of cobotic projects. It aims to develop profitable, safe and acceptable solutions for the final users. This article presents the different steps of the design process of a collaborative robotic cell to improve a recycling laundry pods workstation. Initially, the current activity was analyzed through observations and interviews with users. Next, improvement scenarios were proposed, discussed and prioritized. After that, a feasibility study was carried out and led to technical prototyping. This was evaluated by end users to improve the solution before the investment.
{"title":"User-centered design of a collaborative robotic system for an industrial recycling operation","authors":"Mouad Bounouar, Richard Béarée, A. Siadat, Nathalie Klement, Tahar‐Hakim Benchekroun","doi":"10.1109/IRASET48871.2020.9092178","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9092178","url":null,"abstract":"Collaborative robots (cobots) are presented as a way of business competitiveness by combining human skills with robotic advantages. The place of human operators in this context is the subject of much discussion. Including his role, his safety and his security. This study presents a methodological contribution for the management of cobotic projects. It aims to develop profitable, safe and acceptable solutions for the final users. This article presents the different steps of the design process of a collaborative robotic cell to improve a recycling laundry pods workstation. Initially, the current activity was analyzed through observations and interviews with users. Next, improvement scenarios were proposed, discussed and prioritized. After that, a feasibility study was carried out and led to technical prototyping. This was evaluated by end users to improve the solution before the investment.","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126855384","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 : 2020-04-01DOI: 10.1109/IRASET48871.2020.9092246
S. Maarouf, Zouhair Alouane, B. Tazi, F. Guenoun, Khalil Fouad
Several new composite proton conducting polymer electrolyte membranes of different thicknesses (50-500 μm) based on polyvinyl alcohol (PVA), sulfosuccinic acid (SSA) and silicotungstic acid (SiWA) with or without silica have been developed for polymer electrolyte membrane fuel cells (PEMFCs). The chemical characterization of the membranes has been studied by Fourier Transform Infrared Spectroscopy (FT-IR). The thermal stability of the membranes has been studied using the techniques of thermogravimetric analysis (TGA) between room temperature and 600°C. The water uptake, ionic conductivity in NaCl solution and ionic exchange capacity of these membranes were determined. Water uptake of these membranes ranged between 31% and 88%. The ionic conductivities of these membranes ranged between 1.06.10-3 S.cm-1 to 6.72.10-1. The best water uptake and ionic conductivity were those of the membrane PVA-SSA-SiWA-10 SiO2 containing 10% of silica weight. The membrane PVASSA-SiWA have ionic conductivity of about 3.10.10-3 S.cm-1 in 1M NaCl, and generally increases with SiWA content, and reaches a maximum ionic conductivity of about 6.72.10-3 S.cm-1 in 1M NaCl for the membrane PVA-SSA-SiWA-10SiO2 The ion exchange capacity of this membrane was 1.75 mmol.g-1.
{"title":"Synthesis and Characterisation of Anhydrous Proton Conducting Membranes Based on Sulfonated Poly(vinyl alcohol) and Silicotungstic Acid with or without Silica for Fuel Cell Applications","authors":"S. Maarouf, Zouhair Alouane, B. Tazi, F. Guenoun, Khalil Fouad","doi":"10.1109/IRASET48871.2020.9092246","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9092246","url":null,"abstract":"Several new composite proton conducting polymer electrolyte membranes of different thicknesses (50-500 μm) based on polyvinyl alcohol (PVA), sulfosuccinic acid (SSA) and silicotungstic acid (SiWA) with or without silica have been developed for polymer electrolyte membrane fuel cells (PEMFCs). The chemical characterization of the membranes has been studied by Fourier Transform Infrared Spectroscopy (FT-IR). The thermal stability of the membranes has been studied using the techniques of thermogravimetric analysis (TGA) between room temperature and 600°C. The water uptake, ionic conductivity in NaCl solution and ionic exchange capacity of these membranes were determined. Water uptake of these membranes ranged between 31% and 88%. The ionic conductivities of these membranes ranged between 1.06.10-3 S.cm-1 to 6.72.10-1. The best water uptake and ionic conductivity were those of the membrane PVA-SSA-SiWA-10 SiO2 containing 10% of silica weight. The membrane PVASSA-SiWA have ionic conductivity of about 3.10.10-3 S.cm-1 in 1M NaCl, and generally increases with SiWA content, and reaches a maximum ionic conductivity of about 6.72.10-3 S.cm-1 in 1M NaCl for the membrane PVA-SSA-SiWA-10SiO2 The ion exchange capacity of this membrane was 1.75 mmol.g-1.","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114376329","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 : 2020-04-01DOI: 10.1109/IRASET48871.2020.9092281
Ihsane Salleh, Mohamed Ben Said, L. Azrar
In this work the Meshfree with radial basis functions is elaborated to solve Kolmogorov-Feller (KF) equation associated to stochastic differential equations excited by a Poissonian white noise with uncertain parameters. The general polynomial chaos method is also elaborated to compare the results obtained when the exact solution not available. The accuracy and the effective of these methods are demonstrated.
{"title":"Numerical simulation of stochastic differential equations under Poisson white noise with random parameters","authors":"Ihsane Salleh, Mohamed Ben Said, L. Azrar","doi":"10.1109/IRASET48871.2020.9092281","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9092281","url":null,"abstract":"In this work the Meshfree with radial basis functions is elaborated to solve Kolmogorov-Feller (KF) equation associated to stochastic differential equations excited by a Poissonian white noise with uncertain parameters. The general polynomial chaos method is also elaborated to compare the results obtained when the exact solution not available. The accuracy and the effective of these methods are demonstrated.","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131275063","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 : 2020-04-01DOI: 10.1109/IRASET48871.2020.9092054
A. Brahmi, Ghizlane Chbirik, A. Abounada, El-mahjoub Boufounas
This paper presents a new technique to generate a digital Sinusoidal Pulse Width Modulation (SPWM) control using PIC16F876 microcontroller. This technique is mainly used to control the DC/AC inverter output voltage in many applications such as photovoltaic pumping system and motor drive. It reduces significantly low harmonic components as well as distortion factor. The principle of this method is to transform the sampled dc-biased sine wave signal to a repeating pulses train. The widths of these pulses vary sinusoidally and thus as adigital SPWM. The different amplitude modulations index started from 0.5 unti11.3 (over modulation) with 1 kHz switching frequency was implemented and tested. The literature review of the existing digital SPWM techniques is presented firstly. Subsequently the proposed SPWM approach is briefly detailed. Finally, experimental results are presented to demonstrate the validity of this SPWM method and the good functionality of the realized control unit.
{"title":"Design of SPWM control unit based on microcontroller for photovoltaic inverters","authors":"A. Brahmi, Ghizlane Chbirik, A. Abounada, El-mahjoub Boufounas","doi":"10.1109/IRASET48871.2020.9092054","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9092054","url":null,"abstract":"This paper presents a new technique to generate a digital Sinusoidal Pulse Width Modulation (SPWM) control using PIC16F876 microcontroller. This technique is mainly used to control the DC/AC inverter output voltage in many applications such as photovoltaic pumping system and motor drive. It reduces significantly low harmonic components as well as distortion factor. The principle of this method is to transform the sampled dc-biased sine wave signal to a repeating pulses train. The widths of these pulses vary sinusoidally and thus as adigital SPWM. The different amplitude modulations index started from 0.5 unti11.3 (over modulation) with 1 kHz switching frequency was implemented and tested. The literature review of the existing digital SPWM techniques is presented firstly. Subsequently the proposed SPWM approach is briefly detailed. Finally, experimental results are presented to demonstrate the validity of this SPWM method and the good functionality of the realized control unit.","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134051983","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 : 2020-04-01DOI: 10.1109/iraset48871.2020.9092243
{"title":"IRASET 2020 Author Index","authors":"","doi":"10.1109/iraset48871.2020.9092243","DOIUrl":"https://doi.org/10.1109/iraset48871.2020.9092243","url":null,"abstract":"","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129072472","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 : 2020-04-01DOI: 10.1109/IRASET48871.2020.9091998
A. Lakhdar, M. Jammoukh, L. Zahiri, K. Mansouri, A. Moumen, B. Salhi
PVC is increasingly used in different fields. This means increased use that automatically implies - after the lifetime - an increase in waste, which requires an increase in the recycling rate. This paper proposes an approach to analyse samples of recycled PVC material (rigid and flexible), subject to two types of accelerated aging. Rigid PVC samples are exposed to a continuous temperature of 55°C and UV (ultraviolet) for 15 days, and the flexible PVC samples are exposed to the same temperature with UV exposure generated by a lamp in two ways, samples are exposed to a continuous temperature for 7 days, others are exposed to an intermittent temperature for the same duration, 104 minutes simulating the day, then cooling to room temperature for 104 minutes to simulate the night, the system is controlled by an Arduino Uno board to generate the delay.Numerical modeling is carried out using the finite element method and was able to confirm the results obtained experimentally
{"title":"Numerical and Experimental Study of the Behavior of PVC Material Subjected to Aging","authors":"A. Lakhdar, M. Jammoukh, L. Zahiri, K. Mansouri, A. Moumen, B. Salhi","doi":"10.1109/IRASET48871.2020.9091998","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9091998","url":null,"abstract":"PVC is increasingly used in different fields. This means increased use that automatically implies - after the lifetime - an increase in waste, which requires an increase in the recycling rate. This paper proposes an approach to analyse samples of recycled PVC material (rigid and flexible), subject to two types of accelerated aging. Rigid PVC samples are exposed to a continuous temperature of 55°C and UV (ultraviolet) for 15 days, and the flexible PVC samples are exposed to the same temperature with UV exposure generated by a lamp in two ways, samples are exposed to a continuous temperature for 7 days, others are exposed to an intermittent temperature for the same duration, 104 minutes simulating the day, then cooling to room temperature for 104 minutes to simulate the night, the system is controlled by an Arduino Uno board to generate the delay.Numerical modeling is carried out using the finite element method and was able to confirm the results obtained experimentally","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128432476","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 : 2020-04-01DOI: 10.1109/IRASET48871.2020.9092129
Y. T. Alaoui, N. S. A. Hassani, D. Khomsi
This work focuses on the leaching process of rare earth elements (REEs) from phosphor powder (PP) in order to reach optimal conditions of REEs recovery. Investigated PP was characterized in our previous work, after recovering from waste linear tube fluorescent lamps (FLs). Hydrochloric acid effect on leaching efficiency of REEs from PP is studied. Response surface methodology is used to determine the optimum leaching conditions. Obtained results show that, using 24.S% (v/v) HC1 at 90ºC, 140ml/gL/S ratio and 3h of leaching time, 99% of yttrium is leached out from the studied PP. Due to the highest content of major contaminant (calcium) present in obtained leach liquor, leachant agent (HC1) employed in this study may affect subsequent processes.
{"title":"Optimization by response surface methodology. Application to rare earth elements recovery","authors":"Y. T. Alaoui, N. S. A. Hassani, D. Khomsi","doi":"10.1109/IRASET48871.2020.9092129","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9092129","url":null,"abstract":"This work focuses on the leaching process of rare earth elements (REEs) from phosphor powder (PP) in order to reach optimal conditions of REEs recovery. Investigated PP was characterized in our previous work, after recovering from waste linear tube fluorescent lamps (FLs). Hydrochloric acid effect on leaching efficiency of REEs from PP is studied. Response surface methodology is used to determine the optimum leaching conditions. Obtained results show that, using 24.S% (v/v) HC1 at 90ºC, 140ml/gL/S ratio and 3h of leaching time, 99% of yttrium is leached out from the studied PP. Due to the highest content of major contaminant (calcium) present in obtained leach liquor, leachant agent (HC1) employed in this study may affect subsequent processes.","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116713999","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 : 2020-04-01DOI: 10.1109/IRASET48871.2020.9092280
Y. Baala, S. Bri
This article deals with the power generation control in variable speed wind turbines. In this context, a control strategy is proposed to ensure power extraction optimization of a DFIG-based wind turbine. The proposed control strategy combines an MPPT using a high gain observer and second-order sliding mode for the DFIG control. This strategy presents control to the uncertainties of DFIG modeling, which maximizes efficiency of energy production. This strategy is been validated on a 1.5 Mw wind turbine using the simulator Matlab-simulink. For step and random wind speed profile, we get perfect convergence of the electromagnetic torque and cancellation of the reactive power to the stator. The unit cos $varphi$ and the rate of distortion obtained improves the quality of the currents generated on the Grid and optimizes the efficiency of the conversion chain.
{"title":"DFIG-Based Wind Turbine Control Using High-Gain Observer","authors":"Y. Baala, S. Bri","doi":"10.1109/IRASET48871.2020.9092280","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9092280","url":null,"abstract":"This article deals with the power generation control in variable speed wind turbines. In this context, a control strategy is proposed to ensure power extraction optimization of a DFIG-based wind turbine. The proposed control strategy combines an MPPT using a high gain observer and second-order sliding mode for the DFIG control. This strategy presents control to the uncertainties of DFIG modeling, which maximizes efficiency of energy production. This strategy is been validated on a 1.5 Mw wind turbine using the simulator Matlab-simulink. For step and random wind speed profile, we get perfect convergence of the electromagnetic torque and cancellation of the reactive power to the stator. The unit cos $varphi$ and the rate of distortion obtained improves the quality of the currents generated on the Grid and optimizes the efficiency of the conversion chain.","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115327924","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 : 2020-04-01DOI: 10.1109/IRASET48871.2020.9092240
P. Shrivastava, Ruchika Saini, Abhishek Kumar
Torsional rod in an automobile is a part of suspension system which is responsible for smooth driving and comfort of passengers. It is one of the most important integral system and always on high priority for research to improve driving conditions. This work is analysis the comparison of stepped rod, stepped taper rod and taper rod to absorb vibrations due to uneven roads profile or pits. Various parameters like shear stress, deformation and strain energy are evaluated using ANSYS and comparison has been made among the selected profiles.
{"title":"Investigation of Torsional Rod to Minimize Vibration in Automobile using ANSYS","authors":"P. Shrivastava, Ruchika Saini, Abhishek Kumar","doi":"10.1109/IRASET48871.2020.9092240","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9092240","url":null,"abstract":"Torsional rod in an automobile is a part of suspension system which is responsible for smooth driving and comfort of passengers. It is one of the most important integral system and always on high priority for research to improve driving conditions. This work is analysis the comparison of stepped rod, stepped taper rod and taper rod to absorb vibrations due to uneven roads profile or pits. Various parameters like shear stress, deformation and strain energy are evaluated using ANSYS and comparison has been made among the selected profiles.","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126741203","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 : 2020-04-01DOI: 10.1109/IRASET48871.2020.9092181
H. Hamidane, S. Elfaiz, M. Guerbaoui, A. Ed-Dahhak, A. Lachhab, B. Bouchikhi
In this paper, we present an application of a pole placement technique related to the stability analysis for a linear constrained system. In this regard some of the main approaches that have been used in the last decades dealing with the pole placement will be engaged. Concepts and methods involved in this work include positive invariance as an efficient notion for the pole placement amelioration of a modern SISO system. The state feedback will enhance the stabily of the closed loop system under the notion of constrained control. For this aim, a greenhouse system, is engaged and a linear discrete time state space model, which fits properly the acquired data of the greenhouse, was identified by the mean of the subspace system identification (N4sid) algorithm. The obtained model will be used in order to develop and calculate the state feedback gain based on the so-called Sylvester algebric equation and one of the pole placement techniques algorithm to ameliorate the closedloop pole placement of the system with constraints on the control.
{"title":"Pole placement enhancement of a constrained greenhouse SISO system","authors":"H. Hamidane, S. Elfaiz, M. Guerbaoui, A. Ed-Dahhak, A. Lachhab, B. Bouchikhi","doi":"10.1109/IRASET48871.2020.9092181","DOIUrl":"https://doi.org/10.1109/IRASET48871.2020.9092181","url":null,"abstract":"In this paper, we present an application of a pole placement technique related to the stability analysis for a linear constrained system. In this regard some of the main approaches that have been used in the last decades dealing with the pole placement will be engaged. Concepts and methods involved in this work include positive invariance as an efficient notion for the pole placement amelioration of a modern SISO system. The state feedback will enhance the stabily of the closed loop system under the notion of constrained control. For this aim, a greenhouse system, is engaged and a linear discrete time state space model, which fits properly the acquired data of the greenhouse, was identified by the mean of the subspace system identification (N4sid) algorithm. The obtained model will be used in order to develop and calculate the state feedback gain based on the so-called Sylvester algebric equation and one of the pole placement techniques algorithm to ameliorate the closedloop pole placement of the system with constraints on the control.","PeriodicalId":271840,"journal":{"name":"2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121600359","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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