Pub Date : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807613
Billel Amiri, A. Gómez-Orellana, Pedro Antonio Gutiérrez, R. Dizène, C. Hervás‐Martínez, Dahmani Kahina
This work applies evolutionary product unit neural networks (EPUNNs) to estimate global inclined irradiation at real time and predict it 10 minutes in advance. Both tasks are accomplished simultaneously, by using one single model with two outputs. One advantage of our approach is that the predictions of inclined irradiation are obtained without the need of a series of historical data. In this way, the model only considers one measured input variable, which is the horizontal global irradiation at the previous instant. Besides, the evolutionary algorithm used to optimize the network allows us to obtain the best adapted topology of the model with respect to the number of hidden neurons and synaptic connections. Very promising results are obtained, where the inclined irradiation Iβ(t) is estimated with an accuracy of 5.10% of nRMSE, while it is predicted 10 minutes in advance with an accuracy of 16.97%.
{"title":"Ten Minutes Solar Irradiation Forecasting on Inclined Plane using Evolutionary Product Unit Neural Networks","authors":"Billel Amiri, A. Gómez-Orellana, Pedro Antonio Gutiérrez, R. Dizène, C. Hervás‐Martínez, Dahmani Kahina","doi":"10.1109/ICCSRE.2019.8807613","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807613","url":null,"abstract":"This work applies evolutionary product unit neural networks (EPUNNs) to estimate global inclined irradiation at real time and predict it 10 minutes in advance. Both tasks are accomplished simultaneously, by using one single model with two outputs. One advantage of our approach is that the predictions of inclined irradiation are obtained without the need of a series of historical data. In this way, the model only considers one measured input variable, which is the horizontal global irradiation at the previous instant. Besides, the evolutionary algorithm used to optimize the network allows us to obtain the best adapted topology of the model with respect to the number of hidden neurons and synaptic connections. Very promising results are obtained, where the inclined irradiation Iβ(t) is estimated with an accuracy of 5.10% of nRMSE, while it is predicted 10 minutes in advance with an accuracy of 16.97%.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115502404","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807564
R. Mama, M. Machkour
Databases are becoming more and more unavoidable for all websites or applications that handle massive amounts of information, such as bank accounts, games, social networks, videos, and more. But the databases as for them remain still inaccessible for many people. Non-expert users cannot easily interact with them. This requires knowledge of a database language such as "Structured Query Language" (SQL). For this reason, several efforts have been made to develop database query systems. In this article, we focus on a brief study of fuzzy interrogation systems of database.
{"title":"A study on fuzzy interrogation systems of database","authors":"R. Mama, M. Machkour","doi":"10.1109/ICCSRE.2019.8807564","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807564","url":null,"abstract":"Databases are becoming more and more unavoidable for all websites or applications that handle massive amounts of information, such as bank accounts, games, social networks, videos, and more. But the databases as for them remain still inaccessible for many people. Non-expert users cannot easily interact with them. This requires knowledge of a database language such as \"Structured Query Language\" (SQL). For this reason, several efforts have been made to develop database query systems. In this article, we focus on a brief study of fuzzy interrogation systems of database.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122117902","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807608
Soufiane El Bouji, Z. Beidouri, N. Kamil
As the energy demand Increases, fossil fuels are giving way to other unconventional energy sources. Marine renewable energy, being one of them, offers a number of options to compete in this area. A wide-range of techniques were presented, studied and tested under real sea conditions. Amongst these marine converters, the Oscillating Water Column (OWC) stands out due to its simplicity, and robustness in turbulent sea conditions. In principle, the device leverages the succession of wave crests and troughs to either compress or suck air through a turbine that plays the role of a Power Take-Off device.The OWC's hydrodynamic performance depends upon the chamber's depth, the size of the water inlet and the position of the converter in relation to the free water surface.The objective of our study is to find the optimum output of a converter by methodically changing the geometry parameters and position in relation to the free water surface.For this purpose, we made an OWC That consists of a prototype parallelepiped air chamber, and came up with the following optimal configuration:Distance between the wave-making machine and the device; Water depth in the water column;Prototype's depth;Water inlet size.On the one hand, the obtained results show that the pairing of the geometrical parameters of the device and the condition of the system leads to an improvement in the hydrodynamic performance of the OWC. On the other hand, the various optima found make it possible to converge towards a frequency range close to the device’s natural frequency, which gives a considerable increase in the energy output.
{"title":"Design and Optimization of an Oscillating Water Column Wave Energy Converter","authors":"Soufiane El Bouji, Z. Beidouri, N. Kamil","doi":"10.1109/ICCSRE.2019.8807608","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807608","url":null,"abstract":"As the energy demand Increases, fossil fuels are giving way to other unconventional energy sources. Marine renewable energy, being one of them, offers a number of options to compete in this area. A wide-range of techniques were presented, studied and tested under real sea conditions. Amongst these marine converters, the Oscillating Water Column (OWC) stands out due to its simplicity, and robustness in turbulent sea conditions. In principle, the device leverages the succession of wave crests and troughs to either compress or suck air through a turbine that plays the role of a Power Take-Off device.The OWC's hydrodynamic performance depends upon the chamber's depth, the size of the water inlet and the position of the converter in relation to the free water surface.The objective of our study is to find the optimum output of a converter by methodically changing the geometry parameters and position in relation to the free water surface.For this purpose, we made an OWC That consists of a prototype parallelepiped air chamber, and came up with the following optimal configuration:Distance between the wave-making machine and the device; Water depth in the water column;Prototype's depth;Water inlet size.On the one hand, the obtained results show that the pairing of the geometrical parameters of the device and the condition of the system leads to an improvement in the hydrodynamic performance of the OWC. On the other hand, the various optima found make it possible to converge towards a frequency range close to the device’s natural frequency, which gives a considerable increase in the energy output.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124022911","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807730
Youssef Barradi, K. Zazi, M. Zazi, N. Khaldi
In this paper, we present the modeling and control of a wind energy conversion system using the Permanent Magnet Synchronous Generator (PMSG). Two schemes of control are used: Conventional proportional integral (PI) and a recent control strategy called Active Disturbance Rejection Control (ADRC). We have used a dynamic simulation with a random profile of wind speed in order to get closer to reality. The purpose of the PMSG control is to regulate the electromagnetic torque and the stator current of the PMSG in order to insure the extraction of the maximum power of the wind thanks to the Maximum Power Point Tracking (MPPT) method and to maintain the direct current at zero in order to ensure unity power factor. The ADRC and PI controllers are compared and investigated in terms of references tracking and robustness. Analysis and simulation of our system is realized with MATLAB/Simulink software.
{"title":"A Novel Robust ADRCControl Strategy of a PMSG Based Wind Energy Conversion System","authors":"Youssef Barradi, K. Zazi, M. Zazi, N. Khaldi","doi":"10.1109/ICCSRE.2019.8807730","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807730","url":null,"abstract":"In this paper, we present the modeling and control of a wind energy conversion system using the Permanent Magnet Synchronous Generator (PMSG). Two schemes of control are used: Conventional proportional integral (PI) and a recent control strategy called Active Disturbance Rejection Control (ADRC). We have used a dynamic simulation with a random profile of wind speed in order to get closer to reality. The purpose of the PMSG control is to regulate the electromagnetic torque and the stator current of the PMSG in order to insure the extraction of the maximum power of the wind thanks to the Maximum Power Point Tracking (MPPT) method and to maintain the direct current at zero in order to ensure unity power factor. The ADRC and PI controllers are compared and investigated in terms of references tracking and robustness. Analysis and simulation of our system is realized with MATLAB/Simulink software.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125010768","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807541
Youssef Ait El Kadi, Yassine Lakhal, F. Baghli
The studied system allows to compensate the harmonic pollution by a photovoltaic station under variable solar radiation, it includes a photovoltaic generator (PV), a DC-DC converter that steps up the PV output to the DC link voltage level with maximum power point tracking (MPPT) control and an inverter that links the system to the grid with a variety of non-linear loads. The control strategy used and the obtained results show the benefits of such optimization of the active filter compensation method, in order to improve the quality of the energy (THD ≤2.02%), while limiting the repercussions of the filter on the photovoltaic station and by automatically adapting to the variation of the solar radiation.
{"title":"Compensation of the harmonic pollution by photovoltaic systems under variable solar radiation","authors":"Youssef Ait El Kadi, Yassine Lakhal, F. Baghli","doi":"10.1109/ICCSRE.2019.8807541","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807541","url":null,"abstract":"The studied system allows to compensate the harmonic pollution by a photovoltaic station under variable solar radiation, it includes a photovoltaic generator (PV), a DC-DC converter that steps up the PV output to the DC link voltage level with maximum power point tracking (MPPT) control and an inverter that links the system to the grid with a variety of non-linear loads. The control strategy used and the obtained results show the benefits of such optimization of the active filter compensation method, in order to improve the quality of the energy (THD ≤2.02%), while limiting the repercussions of the filter on the photovoltaic station and by automatically adapting to the variation of the solar radiation.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121588008","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807604
R. Latif, A. Saddik, A. Elouardi
The monitoring of agricultural soils has become a necessary need for good soil quality. For this reason several parameters have been studied to solve problems in agriculture. On the other hand we find several tools for this monitoring, generally the most known are based on UAVs. In this article we will focus on evaluating the two most known parameters the Normalized Difference Vegetation Index (NDVI) and the Normalized Difference Water Index (NDWI). The evaluation of these parameters was done in a heterogeneous embedded ODROID-XU4 architecture based on two CPUs and a GPU.
{"title":"Evaluation of Agricultural Precision Algorithms on UAV Images","authors":"R. Latif, A. Saddik, A. Elouardi","doi":"10.1109/ICCSRE.2019.8807604","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807604","url":null,"abstract":"The monitoring of agricultural soils has become a necessary need for good soil quality. For this reason several parameters have been studied to solve problems in agriculture. On the other hand we find several tools for this monitoring, generally the most known are based on UAVs. In this article we will focus on evaluating the two most known parameters the Normalized Difference Vegetation Index (NDVI) and the Normalized Difference Water Index (NDWI). The evaluation of these parameters was done in a heterogeneous embedded ODROID-XU4 architecture based on two CPUs and a GPU.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114752047","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807744
Abdelhakim Moutaouakil, Y. Jabrane, Abdelati Reha, My Abdelaziz Koumina
In this paper, the behavior of a ring on the performonce of a patch antenna a is to dincrease the Bandwidth and to change the frequency of resonance towards less frequencies. The patch antenna is planar antennas generally made on printed circuits. They are commonly used in mobile communications because of their small size and ease of integration. They consist of a radiating element, a ground plane and a dielectric substrate of permittivity (εr) and permeability (μr), The simulated results are obtained from CADFEKO a Method of Moments Model-Based Solver.
{"title":"Effect Study of a Ring on the performances of a patch antenna","authors":"Abdelhakim Moutaouakil, Y. Jabrane, Abdelati Reha, My Abdelaziz Koumina","doi":"10.1109/ICCSRE.2019.8807744","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807744","url":null,"abstract":"In this paper, the behavior of a ring on the performonce of a patch antenna a is to dincrease the Bandwidth and to change the frequency of resonance towards less frequencies. The patch antenna is planar antennas generally made on printed circuits. They are commonly used in mobile communications because of their small size and ease of integration. They consist of a radiating element, a ground plane and a dielectric substrate of permittivity (εr) and permeability (μr), The simulated results are obtained from CADFEKO a Method of Moments Model-Based Solver.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"4565 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128998349","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807520
Ijjou Tizgui, Fatima El Guezar, H. Bouzahir
An economic evaluation is essential before any energy project. It can be used to decide on energy purchases, to select on the competing technologies, to finance an energy project, to control costs, to analyze benefits or to make a decision. This work summarizes the needed theory to support decision makers in evaluating the economic profitability of a wind energy project and making decision on investing in it. Moreover, those practical economics analysis can be applied for judging other renewable energies projects. It can be also used to compare different technologies, to compare alternative renewable energies or compare it with conventional energies. Moreover, the results of two applications of this methodology are presented (Estimation of the cost per kWh of wind produced energy at nine wind farms in Morocco and comparison of six turbine models to be installed at Dakhla city in Morocco basing on the cost per kWh of wind generated energy, the payback period and the net present values).
{"title":"A Methodology for the Economic Study of a Wind Energy Project","authors":"Ijjou Tizgui, Fatima El Guezar, H. Bouzahir","doi":"10.1109/ICCSRE.2019.8807520","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807520","url":null,"abstract":"An economic evaluation is essential before any energy project. It can be used to decide on energy purchases, to select on the competing technologies, to finance an energy project, to control costs, to analyze benefits or to make a decision. This work summarizes the needed theory to support decision makers in evaluating the economic profitability of a wind energy project and making decision on investing in it. Moreover, those practical economics analysis can be applied for judging other renewable energies projects. It can be also used to compare different technologies, to compare alternative renewable energies or compare it with conventional energies. Moreover, the results of two applications of this methodology are presented (Estimation of the cost per kWh of wind produced energy at nine wind farms in Morocco and comparison of six turbine models to be installed at Dakhla city in Morocco basing on the cost per kWh of wind generated energy, the payback period and the net present values).","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"379 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122775350","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807761
Khalid Abouloula, Ali Ou-yassine, S. Krit, M. Elhoseny
in this article we will try to highlight some of the mistakes that doing by some traders in the market, especially those who use Fibonacci correction to make decision in trading. The Fibonacci sequence is ideal mathematically, but this method release noise when included in the trading graphics, so we will work in this paper to clarify some of these errors and eliminate noise in a Fibonacci sequence in order to avoid the wrong signals, and so we have contributed to help traders in the market through automated trading to avoid loss and make a bigger profit.
{"title":"Lower the loss ratio when using a Fibonacci Indicator Retracement to Restore Accuracy by Avoiding Wrong Forecasts using enhanced indicators","authors":"Khalid Abouloula, Ali Ou-yassine, S. Krit, M. Elhoseny","doi":"10.1109/ICCSRE.2019.8807761","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807761","url":null,"abstract":"in this article we will try to highlight some of the mistakes that doing by some traders in the market, especially those who use Fibonacci correction to make decision in trading. The Fibonacci sequence is ideal mathematically, but this method release noise when included in the trading graphics, so we will work in this paper to clarify some of these errors and eliminate noise in a Fibonacci sequence in order to avoid the wrong signals, and so we have contributed to help traders in the market through automated trading to avoid loss and make a bigger profit.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123470603","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 : 2019-07-01DOI: 10.1109/ICCSRE.2019.8807711
Rachid Adrdor, L. Koutti
Several problems in multi-agent coordination can be modeled using a Distributed Constraint Optimization Problem (DCOP) paradigm, which can be solved using one of the state-of-the-art algorithms that solve DCOPs. The AFB_BJ+-AC* algorithm is one of the newest of these algorithms. It uses soft arc consistency techniques (AC*) to rapidly reach the optimal solution of a DCOP by deleting non-optimal values from each agent domain. This paper enhances the AFB_BJ+-AC* algorithm to surpass its inefficiency in some problems, especially those where the number of deletions is too limited or remains zero, by increasing the ability of soft arc consistency techniques (AC*) to generate deletions. The idea is centered on increasing the value of the zero-arity constraint, used as a bound to delete values, by redistributing the constraint costs between an agent and its neighbors via extension operations, then via the execution of AC*. Our experiments on different benchmarks show that the new improvements make AFB_BJ+-AC* better in terms of communication load and computation effort.
{"title":"Enhancing AFB_BJ+-AC* algorithm","authors":"Rachid Adrdor, L. Koutti","doi":"10.1109/ICCSRE.2019.8807711","DOIUrl":"https://doi.org/10.1109/ICCSRE.2019.8807711","url":null,"abstract":"Several problems in multi-agent coordination can be modeled using a Distributed Constraint Optimization Problem (DCOP) paradigm, which can be solved using one of the state-of-the-art algorithms that solve DCOPs. The AFB_BJ+-AC* algorithm is one of the newest of these algorithms. It uses soft arc consistency techniques (AC*) to rapidly reach the optimal solution of a DCOP by deleting non-optimal values from each agent domain. This paper enhances the AFB_BJ+-AC* algorithm to surpass its inefficiency in some problems, especially those where the number of deletions is too limited or remains zero, by increasing the ability of soft arc consistency techniques (AC*) to generate deletions. The idea is centered on increasing the value of the zero-arity constraint, used as a bound to delete values, by redistributing the constraint costs between an agent and its neighbors via extension operations, then via the execution of AC*. Our experiments on different benchmarks show that the new improvements make AFB_BJ+-AC* better in terms of communication load and computation effort.","PeriodicalId":360150,"journal":{"name":"2019 International Conference of Computer Science and Renewable Energies (ICCSRE)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114572089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：