Pub Date : 2018-11-01DOI: 10.1109/ICMEAE.2018.00016
Arturo G. Roa-Borbolla, A. Marín-Hernández, Uriel H. Hernandez-Belmonte, V. Ayala-Ramírez, Karen Roa-F.
In a lot of sciences as in mobile robots, is always necessary to determine the performance of new algorithms. Profiling is a useful tool during the process of development and testing new algorithms. The use of mobile robot simulators allows to verify and to test the performance and efficiency of new approaches. When an algorithm is evaluated, is very helpful to have a huge testing dataset to ensure, that the roposed methodology is robust for a wide range of possible scenarios. In most of the public dataset, the number of scenarios to probe new algorithms is limited, the maps are hard to modify, and the map description is not standard. Because of that, we introduce a realistic and automatic map generator for mobile robots based on Gazebo due that Gazebo is a very advanced simulator that can be used in conjunction with ROS. This combination enables the easy prototyping and testing of robotics applications, in simulated and in real robots with minimal modifications.
{"title":"Realistic and Automatic Map Generator for Mobile Robots","authors":"Arturo G. Roa-Borbolla, A. Marín-Hernández, Uriel H. Hernandez-Belmonte, V. Ayala-Ramírez, Karen Roa-F.","doi":"10.1109/ICMEAE.2018.00016","DOIUrl":"https://doi.org/10.1109/ICMEAE.2018.00016","url":null,"abstract":"In a lot of sciences as in mobile robots, is always necessary to determine the performance of new algorithms. Profiling is a useful tool during the process of development and testing new algorithms. The use of mobile robot simulators allows to verify and to test the performance and efficiency of new approaches. When an algorithm is evaluated, is very helpful to have a huge testing dataset to ensure, that the roposed methodology is robust for a wide range of possible scenarios. In most of the public dataset, the number of scenarios to probe new algorithms is limited, the maps are hard to modify, and the map description is not standard. Because of that, we introduce a realistic and automatic map generator for mobile robots based on Gazebo due that Gazebo is a very advanced simulator that can be used in conjunction with ROS. This combination enables the easy prototyping and testing of robotics applications, in simulated and in real robots with minimal modifications.","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131767993","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 : 2018-11-01DOI: 10.1109/ICMEAE.2018.00027
A. Salcedo
Classical electromagnetic waves with frequencies below 3Hz, referred as Under Extremely Low Frequency (UELF) waves, can be radiated by rotating cosmic structures with an associated magnetic field, like planets, stars, pulsars and galaxies. Considering the extreme time scales that characterize UELF waves, which can be as long as billions of years, the associated wavelengths are so large that long range interactions could be produced between extremely distant cosmic structures that could be billions of light years apart. The extreme dimensions, masses and speeds of the radiating cosmic structures, on the other hand, presume that the distant interaction between the studied cosmic objects may not be electromagnetic only but also gravitational (in spite of the humongous distances involved), so the study of UELF waves needs to consider both effects combined. Gravitational wave theory is the leading line of work trying to explain long range interactions due to gravity forces; yet, the present working paper attains to the gravitomagnetic field theory to build a novel communications model that integrates classical forces produced by moving electric charges and masses into a single framework. The proposed model allows an integral approach to investigate long range interactions between the explained distant cosmic structures, and invites to reflect and discuss about the nature and implications of UELF radiation.
{"title":"Gravitoelectromagnetic Communications Model for under Extremely Low Frequency Interactions between Distant Cosmic Structures","authors":"A. Salcedo","doi":"10.1109/ICMEAE.2018.00027","DOIUrl":"https://doi.org/10.1109/ICMEAE.2018.00027","url":null,"abstract":"Classical electromagnetic waves with frequencies below 3Hz, referred as Under Extremely Low Frequency (UELF) waves, can be radiated by rotating cosmic structures with an associated magnetic field, like planets, stars, pulsars and galaxies. Considering the extreme time scales that characterize UELF waves, which can be as long as billions of years, the associated wavelengths are so large that long range interactions could be produced between extremely distant cosmic structures that could be billions of light years apart. The extreme dimensions, masses and speeds of the radiating cosmic structures, on the other hand, presume that the distant interaction between the studied cosmic objects may not be electromagnetic only but also gravitational (in spite of the humongous distances involved), so the study of UELF waves needs to consider both effects combined. Gravitational wave theory is the leading line of work trying to explain long range interactions due to gravity forces; yet, the present working paper attains to the gravitomagnetic field theory to build a novel communications model that integrates classical forces produced by moving electric charges and masses into a single framework. The proposed model allows an integral approach to investigate long range interactions between the explained distant cosmic structures, and invites to reflect and discuss about the nature and implications of UELF radiation.","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134393801","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 : 2018-11-01DOI: 10.1109/ICMEAE.2018.00021
M. Mejía-Lavalle, José Cano, D. Vargas, H. Sossa
A Pulse-Coupled Artificial Neural Network capable of efficiently tackle the problem of finding the shortest path between two nodes is presented. Once the Artificial Network finds the target node at minimum cost, an extraction or Knowledge Explicitation of this Network is performed to recover the final trajectory. The efficient solution of the shortest path problem has applications in such important and current areas as robotics, telecommunications, operation research, game theory, computer networks, internet, industrial design, transport phenomena, design of electronic circuits and others, so it is a subject of great interest in the area of combinatorial optimization. Due to the parallel design of the Neuronal Network presented here, it is possible speed up the solution using parallel multi-processors; this solution approach can be highly competitive, as observed from the good results obtained, even in cases with thousands of nodes.
{"title":"Neural Network for Shortest Path Problems Accelerated with Parallel Multi-core Architecture","authors":"M. Mejía-Lavalle, José Cano, D. Vargas, H. Sossa","doi":"10.1109/ICMEAE.2018.00021","DOIUrl":"https://doi.org/10.1109/ICMEAE.2018.00021","url":null,"abstract":"A Pulse-Coupled Artificial Neural Network capable of efficiently tackle the problem of finding the shortest path between two nodes is presented. Once the Artificial Network finds the target node at minimum cost, an extraction or Knowledge Explicitation of this Network is performed to recover the final trajectory. The efficient solution of the shortest path problem has applications in such important and current areas as robotics, telecommunications, operation research, game theory, computer networks, internet, industrial design, transport phenomena, design of electronic circuits and others, so it is a subject of great interest in the area of combinatorial optimization. Due to the parallel design of the Neuronal Network presented here, it is possible speed up the solution using parallel multi-processors; this solution approach can be highly competitive, as observed from the good results obtained, even in cases with thousands of nodes.","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125991218","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 : 2018-11-01DOI: 10.1109/icmeae.2018.00001
{"title":"Title Page i","authors":"","doi":"10.1109/icmeae.2018.00001","DOIUrl":"https://doi.org/10.1109/icmeae.2018.00001","url":null,"abstract":"","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124840905","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 : 2018-11-01DOI: 10.1109/icmeae.2018.00045
{"title":"Publisher's Information","authors":"","doi":"10.1109/icmeae.2018.00045","DOIUrl":"https://doi.org/10.1109/icmeae.2018.00045","url":null,"abstract":"","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129881322","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 : 2018-11-01DOI: 10.1109/ICMEAE.2018.00028
J. Alan, Gonzalo Jiménez, Edwin Maldonado, Antonio Silvestre, David Poza, Moisés Vargas, Hiram Ponce
Some of the most serious problems in cities are soil pollution and littering in public places. The amount of litter pilled up in the venues of public parks is so much that it indirectly causes different phenomena like insecurity, crime and promotes more pollution. In that sense, this paper presents the design of an autonomous robotic system for performing the tasks of collection, sweeping, vacuuming and cleaning at ground level. This work shows a proof-of-concept and a prototype in order to validate the proposed mechatronics system. Experimental results show that this machine is able to clean wide areas, promoting less pollution and litter in public spaces like parks.
{"title":"Design of an Automated Sweeper for Public Parks","authors":"J. Alan, Gonzalo Jiménez, Edwin Maldonado, Antonio Silvestre, David Poza, Moisés Vargas, Hiram Ponce","doi":"10.1109/ICMEAE.2018.00028","DOIUrl":"https://doi.org/10.1109/ICMEAE.2018.00028","url":null,"abstract":"Some of the most serious problems in cities are soil pollution and littering in public places. The amount of litter pilled up in the venues of public parks is so much that it indirectly causes different phenomena like insecurity, crime and promotes more pollution. In that sense, this paper presents the design of an autonomous robotic system for performing the tasks of collection, sweeping, vacuuming and cleaning at ground level. This work shows a proof-of-concept and a prototype in order to validate the proposed mechatronics system. Experimental results show that this machine is able to clean wide areas, promoting less pollution and litter in public spaces like parks.","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122785651","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 : 2018-11-01DOI: 10.1109/ICMEAE.2018.00038
M. A. Alcorta-Garcia, Mirna Maricela Martínez-Flores, S. Méndez-Díaz, E. Alcorta-García, Luis Arturo Valdéz Hinojosa
Optimal Risk-Sensitive control equations with tracking for first degree polynomial stochastic systems have been obtained and applied to heater system where the actuator is the electrical resistance, achieving the optimal values of the state, for different values of the parameter epsilon which multiplies the white noise in the state equation, which is non linear. Exponential quadratic criterion function to be minimized values are obtained in final time, for some values of the parameter . PID simulation was realized for this heater system. Values of the errors for both (Risk-Sensitive with tracking and PID) are presented in tables showing advantages the Risk-Sensitive control. In addition, in this paper is present the optimal Risk-Sensitive filtering equations applied to the heater system, with both controls and exponential quadratic criterion to be minimized, which contain the quadratic error, for some values of the parameter . Advantage for the system conformed by optimal non linear Risk-Sensitive stochastic control with tracking and non linear stochastic Risk-Sensitive filtering equations is observed through tables
{"title":"Non-linear Optimal Filter and Control with Tracking vs Pid Applied to an Electric Resistance System","authors":"M. A. Alcorta-Garcia, Mirna Maricela Martínez-Flores, S. Méndez-Díaz, E. Alcorta-García, Luis Arturo Valdéz Hinojosa","doi":"10.1109/ICMEAE.2018.00038","DOIUrl":"https://doi.org/10.1109/ICMEAE.2018.00038","url":null,"abstract":"Optimal Risk-Sensitive control equations with tracking for first degree polynomial stochastic systems have been obtained and applied to heater system where the actuator is the electrical resistance, achieving the optimal values of the state, for different values of the parameter epsilon which multiplies the white noise in the state equation, which is non linear. Exponential quadratic criterion function to be minimized values are obtained in final time, for some values of the parameter . PID simulation was realized for this heater system. Values of the errors for both (Risk-Sensitive with tracking and PID) are presented in tables showing advantages the Risk-Sensitive control. In addition, in this paper is present the optimal Risk-Sensitive filtering equations applied to the heater system, with both controls and exponential quadratic criterion to be minimized, which contain the quadratic error, for some values of the parameter . Advantage for the system conformed by optimal non linear Risk-Sensitive stochastic control with tracking and non linear stochastic Risk-Sensitive filtering equations is observed through tables","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131177132","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 : 2018-11-01DOI: 10.1109/ICMEAE.2018.00008
Daniel Garcia-Olivares, Eduardo Fragoso-Navarro, M. Cedillo-Hernández, M. Nakano, Antonio Cedillo-Hernández, H. Perez-Meana
In this paper we propose a security enhancement method for color images management. Our proposed algorithm is a combination of invisible watermarking and reversible data-hiding, both performed in the encrypted domain of the color images. Initially, the original image is converted from RGB to YCbCr color model and then each component is ciphered by applying a chaotic mixing procedure by using a first content owner's key. Reversible data hiding technique is used to embed additional bits into the ciphered chrominance information. With purposes of ownership authentication, an invisible watermarking technique is used to embed a watermark into the ciphered luminance information. Finally, to increase the security of the method, the ciphered chrominance and luminance components with hidden data are ciphered again by using a second content owner's key and a lightweight encryption algorithm. Three options are available for receivers who hold different keys: a) extract embedded additional bits and the watermark, b) decrypt the watermarked image with embedded additional bits, or c) extract the additional bits, the watermark and generate the recovered image that is identical to the original, respectively. Experimental results show the imperceptibility, capacity and security of the proposed method in the context of watermarking and reversible data hiding techniques, respectively.
{"title":"Security Enhancement for Color Images via Invisible Watermarking and Reversible Data Hiding in Encrypted Domain","authors":"Daniel Garcia-Olivares, Eduardo Fragoso-Navarro, M. Cedillo-Hernández, M. Nakano, Antonio Cedillo-Hernández, H. Perez-Meana","doi":"10.1109/ICMEAE.2018.00008","DOIUrl":"https://doi.org/10.1109/ICMEAE.2018.00008","url":null,"abstract":"In this paper we propose a security enhancement method for color images management. Our proposed algorithm is a combination of invisible watermarking and reversible data-hiding, both performed in the encrypted domain of the color images. Initially, the original image is converted from RGB to YCbCr color model and then each component is ciphered by applying a chaotic mixing procedure by using a first content owner's key. Reversible data hiding technique is used to embed additional bits into the ciphered chrominance information. With purposes of ownership authentication, an invisible watermarking technique is used to embed a watermark into the ciphered luminance information. Finally, to increase the security of the method, the ciphered chrominance and luminance components with hidden data are ciphered again by using a second content owner's key and a lightweight encryption algorithm. Three options are available for receivers who hold different keys: a) extract embedded additional bits and the watermark, b) decrypt the watermarked image with embedded additional bits, or c) extract the additional bits, the watermark and generate the recovered image that is identical to the original, respectively. Experimental results show the imperceptibility, capacity and security of the proposed method in the context of watermarking and reversible data hiding techniques, respectively.","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124800343","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 : 2018-11-01DOI: 10.1109/ICMEAE.2018.00041
Carlos Alejandro Avila-Rea, Eduardo Hernández-Márquez, R. Silva-Ortigoza, H. Taud, G. Saldaña-González
In this paper, a passive control for the angular velocity of the full-bridge Buck inverter-DC motor system is presented. This control uses only the converter current to drive the angular velocity. The control performance is verified in a circuit built in SimPowerSystem Toolbox of Matlab-Simulink. The simulation results in closed-loop show that the control objective is achieved.
{"title":"A Passive Control for the Full-Bridge Buck Inverter–DC Motor System","authors":"Carlos Alejandro Avila-Rea, Eduardo Hernández-Márquez, R. Silva-Ortigoza, H. Taud, G. Saldaña-González","doi":"10.1109/ICMEAE.2018.00041","DOIUrl":"https://doi.org/10.1109/ICMEAE.2018.00041","url":null,"abstract":"In this paper, a passive control for the angular velocity of the full-bridge Buck inverter-DC motor system is presented. This control uses only the converter current to drive the angular velocity. The control performance is verified in a circuit built in SimPowerSystem Toolbox of Matlab-Simulink. The simulation results in closed-loop show that the control objective is achieved.","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121298148","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 : 2018-11-01DOI: 10.1109/ICMEAE.2018.00022
Diego Soberanis, Z. Zamudio
The drowsiness causes an average of 328,000 crashes per year. Many technologies had been created to avoid this kind of accidents. However, the number of fatalities which involves drowsy drivers still present due to the complexity and ambiguity of this common symptom. Computer vision and some Artificial Intelligence algorithms were implemented to solve the problem while the vehicle is in motion. Many of those have not been implemented in commercial vehicles because the drowsy driver detection with real conditions is not 100% reliable. Adding to this, some other systems review the heart rate variability (HRV) while the person is driving and detects if the driver is falling asleep. However, if the person doesn't use the sensor during driving, this method is not useful. This paper presents a different approach on how drowsy driver problem can be solved before a person starts driving. A heartbeat pulse had been used to measure and calculate the number of hours that a person sleeps per day, the hour of the day and quality of sleep. Then, data were analyzed using different classifiers to decide if the driver is a potential candidate to fall sleep on the road. As a result, a comparison between different classifiers showed that, for solving this particular problem, the best method is the Support Vector Machine classifier with an average of 91.23% of accuracy.
{"title":"Comparison of Different Classifiers to Detect Symptoms of Drowsiness before the Vehicle is in Motion Using a Heartbeat Pulse Bracelet","authors":"Diego Soberanis, Z. Zamudio","doi":"10.1109/ICMEAE.2018.00022","DOIUrl":"https://doi.org/10.1109/ICMEAE.2018.00022","url":null,"abstract":"The drowsiness causes an average of 328,000 crashes per year. Many technologies had been created to avoid this kind of accidents. However, the number of fatalities which involves drowsy drivers still present due to the complexity and ambiguity of this common symptom. Computer vision and some Artificial Intelligence algorithms were implemented to solve the problem while the vehicle is in motion. Many of those have not been implemented in commercial vehicles because the drowsy driver detection with real conditions is not 100% reliable. Adding to this, some other systems review the heart rate variability (HRV) while the person is driving and detects if the driver is falling asleep. However, if the person doesn't use the sensor during driving, this method is not useful. This paper presents a different approach on how drowsy driver problem can be solved before a person starts driving. A heartbeat pulse had been used to measure and calculate the number of hours that a person sleeps per day, the hour of the day and quality of sleep. Then, data were analyzed using different classifiers to decide if the driver is a potential candidate to fall sleep on the road. As a result, a comparison between different classifiers showed that, for solving this particular problem, the best method is the Support Vector Machine classifier with an average of 91.23% of accuracy.","PeriodicalId":138897,"journal":{"name":"2018 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115664294","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：