Pub Date : 2016-02-25DOI: 10.1109/CMI.2016.7413712
P. Banerjee, S. Dasgupta, R. Ghosh, B. Goswami
An electrical impedance model of a thin disc piezo based sensor, used for resonance frequency analysis, is proposed in this paper. The sensor consists of the piezo element attached to a metallic strip with some adhesive and so, the response of the sensor is dependent on the geometry and modes of vibration of both the piezo element and the metallic strip attached to it. The experimentally measured impedance responses of the piezo elements and the corresponding sensors are compared with the simulated responses to validate the proposed model. The study reveals the effects of the various aspects of the piezo and the effect of addition of the metallic strip on the sensor response in terms of various impedance blocks.
{"title":"Electrical impedance model of piezoelectric based sensor","authors":"P. Banerjee, S. Dasgupta, R. Ghosh, B. Goswami","doi":"10.1109/CMI.2016.7413712","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413712","url":null,"abstract":"An electrical impedance model of a thin disc piezo based sensor, used for resonance frequency analysis, is proposed in this paper. The sensor consists of the piezo element attached to a metallic strip with some adhesive and so, the response of the sensor is dependent on the geometry and modes of vibration of both the piezo element and the metallic strip attached to it. The experimentally measured impedance responses of the piezo elements and the corresponding sensors are compared with the simulated responses to validate the proposed model. The study reveals the effects of the various aspects of the piezo and the effect of addition of the metallic strip on the sensor response in terms of various impedance blocks.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124636798","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 : 2016-02-25DOI: 10.1109/CMI.2016.7413779
Avishek Adhikary, G. Kumar, Susanta Banerjee, S. Sen, K. Biswas
In a previous work [1], a phase angle based conductivity sensing is reported, using a polymer (DQN-70) coated epoxy probe. That reported sensor is robust, light weight and low cost and its sensing technology is a simple and novel one. But, the sensing range is limited to low value (10 μS/cm to 1 mS/cm) and it needs high frequency excitation (200 kHz, 2 MHz and more). This paper aims to overcome those limitations. This work proposes an electrical equivalent model for the reported sensing system. Through this modeling, this paper analyses different aspects of said phase-based-sensing. The modelling also explains how the distributive capacitance of the system plays a key role in such sensing. It is shown that, the sensor performance (range and operating frequency) is improved by increasing the effective capacitance. The system is then modified accordingly and the concept is validated experimentally. The modified system senses higher range (10 μS/cm to 2.5 mS/cm) at only 200 kHz frequency.
{"title":"Modelling and performance improvement of phase-angle-based conductivity sensor","authors":"Avishek Adhikary, G. Kumar, Susanta Banerjee, S. Sen, K. Biswas","doi":"10.1109/CMI.2016.7413779","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413779","url":null,"abstract":"In a previous work [1], a phase angle based conductivity sensing is reported, using a polymer (DQN-70) coated epoxy probe. That reported sensor is robust, light weight and low cost and its sensing technology is a simple and novel one. But, the sensing range is limited to low value (10 μS/cm to 1 mS/cm) and it needs high frequency excitation (200 kHz, 2 MHz and more). This paper aims to overcome those limitations. This work proposes an electrical equivalent model for the reported sensing system. Through this modeling, this paper analyses different aspects of said phase-based-sensing. The modelling also explains how the distributive capacitance of the system plays a key role in such sensing. It is shown that, the sensor performance (range and operating frequency) is improved by increasing the effective capacitance. The system is then modified accordingly and the concept is validated experimentally. The modified system senses higher range (10 μS/cm to 2.5 mS/cm) at only 200 kHz frequency.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124844007","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 : 2016-02-25DOI: 10.1109/CMI.2016.7413799
A. Banerjee, D. Tibarewala
In this paper an eye blink rate tracker is proposed for the persons working with computer for long duration. Now-a-days a common problem of computer users is Dry Eyes. Low blink is the reason behind redness and dryness of the eyes. While working in front of a computer screen, blink rate tends to decrease. This leads to inadequate tear film formation on the eye cornea. Designing an eye blink detection algorithm to apply in dry eye prevention is the ultimate goal of this work. Eye blink data along with other eye movement is recorded from Electrooculogram using a laboratory developed data acquisition system. Blinks are detected from recorded data using threshold. A maximum average accuracy of 96.67% is obtained in offline mode. To detect blinks in real time the trained classifier is used. The system counts the number of blinks for a certain time interval. In case of insufficient blinks the computer gets logged off. Thus forcing people working on a computer for long periods to rest the eyes until the computer is turned on manually. In real time, the proposed method is validated using a study on fifteen participants.
{"title":"Electrooculogram based approach for prevention of dry eye condition in computer users","authors":"A. Banerjee, D. Tibarewala","doi":"10.1109/CMI.2016.7413799","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413799","url":null,"abstract":"In this paper an eye blink rate tracker is proposed for the persons working with computer for long duration. Now-a-days a common problem of computer users is Dry Eyes. Low blink is the reason behind redness and dryness of the eyes. While working in front of a computer screen, blink rate tends to decrease. This leads to inadequate tear film formation on the eye cornea. Designing an eye blink detection algorithm to apply in dry eye prevention is the ultimate goal of this work. Eye blink data along with other eye movement is recorded from Electrooculogram using a laboratory developed data acquisition system. Blinks are detected from recorded data using threshold. A maximum average accuracy of 96.67% is obtained in offline mode. To detect blinks in real time the trained classifier is used. The system counts the number of blinks for a certain time interval. In case of insufficient blinks the computer gets logged off. Thus forcing people working on a computer for long periods to rest the eyes until the computer is turned on manually. In real time, the proposed method is validated using a study on fifteen participants.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127265729","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 : 2016-02-25DOI: 10.1109/CMI.2016.7413767
R. Jain, M. Aware, A. Junghare
The main aim of this paper is to design PID control PWM module using field programmable gate array (FPGA) technology. FPGA based realization offers high speed, complex functionality, consume less power, and provides parallel processing. In this paper, we have implemented PID control PWM module on programmable logic design software Quartus II and verified on DE0 Nano Board (Cyclone IV FPGA family of company Altera). Signal Tap II analyzer and RTL viewer are used for analyzing and debugging the design. For Proper timing constraint and clock arrangement, Time Quest analyzer is used. The simulation and hardware results shows that implementation with FPGA has some advantages such as flexible design, high reliability and high speed.
本文的主要目的是利用现场可编程门阵列(FPGA)技术设计PID控制PWM模块。基于FPGA的实现提供高速、复杂的功能、更低的功耗，并提供并行处理。本文在可编程逻辑设计软件Quartus II上实现了PID控制PWM模块，并在DE0纳米板(Altera公司的Cyclone IV FPGA系列)上进行了验证。采用Signal Tap II分析仪和RTL查看器对设计进行分析和调试。为了实现合理的时序约束和时钟安排，采用了Time Quest分析仪。仿真和硬件结果表明，采用FPGA实现具有设计灵活、可靠性高、速度快等优点。
{"title":"Implementation of a PID control PWM module on altera DE0 kit using FPGA","authors":"R. Jain, M. Aware, A. Junghare","doi":"10.1109/CMI.2016.7413767","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413767","url":null,"abstract":"The main aim of this paper is to design PID control PWM module using field programmable gate array (FPGA) technology. FPGA based realization offers high speed, complex functionality, consume less power, and provides parallel processing. In this paper, we have implemented PID control PWM module on programmable logic design software Quartus II and verified on DE0 Nano Board (Cyclone IV FPGA family of company Altera). Signal Tap II analyzer and RTL viewer are used for analyzing and debugging the design. For Proper timing constraint and clock arrangement, Time Quest analyzer is used. The simulation and hardware results shows that implementation with FPGA has some advantages such as flexible design, high reliability and high speed.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127291535","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 : 2016-02-25DOI: 10.1109/CMI.2016.7413800
M. Pal, R. K. Barai, G. Sarkar, Tamal Roy
Reference input tracking plays a major role in control system Engineering. Inverse model technique is very useful for exact tracking of minimum phase system but for non-minimum phase system, it gives unbounded output response. This paper proposes an effective method for achieving the approximate desired trajectory tracking of unstable inversion-based non-minimum phase (NMP) system. Here two-degree-of-freedom control theory has been applied where feedback control is provided by arbitrary pole placement method to create the bounded response of unstable NMP system. Lyapunov based Direct Model Reference Adaptive Control (MRAC) of inverse transfer function model of NMP system act as feed-forward compensator in 2DOF framework to track the reference input trajectory. Unstable non-minimum phase plant can successfully track step, ramp and parabolic input signal with a minimum steady state error shown in the simulation results. Initial undershoot which is obvious in NMP system has been completely removed by this control strategy.
{"title":"Reference input tracking of inversion-based non-minimum phase system using adaptive two-degree-of-freedom control","authors":"M. Pal, R. K. Barai, G. Sarkar, Tamal Roy","doi":"10.1109/CMI.2016.7413800","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413800","url":null,"abstract":"Reference input tracking plays a major role in control system Engineering. Inverse model technique is very useful for exact tracking of minimum phase system but for non-minimum phase system, it gives unbounded output response. This paper proposes an effective method for achieving the approximate desired trajectory tracking of unstable inversion-based non-minimum phase (NMP) system. Here two-degree-of-freedom control theory has been applied where feedback control is provided by arbitrary pole placement method to create the bounded response of unstable NMP system. Lyapunov based Direct Model Reference Adaptive Control (MRAC) of inverse transfer function model of NMP system act as feed-forward compensator in 2DOF framework to track the reference input trajectory. Unstable non-minimum phase plant can successfully track step, ramp and parabolic input signal with a minimum steady state error shown in the simulation results. Initial undershoot which is obvious in NMP system has been completely removed by this control strategy.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121106610","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 : 2016-02-25DOI: 10.1109/CMI.2016.7413710
P. A. Kumar, N. Rao
A novel single layered fractal spiral capacitor has been designed using fractal geometry. The simulation results carried out by High Frequency Structural Simulator. The simulation results shows fractal spiral capacitor provides10.3% improvement in Capacitance, 52.4% improvement in Q factor and 20% improvement in self resonant frequency over standard spiral capacitor.
{"title":"Fractal spiral capacitor for RF applications","authors":"P. A. Kumar, N. Rao","doi":"10.1109/CMI.2016.7413710","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413710","url":null,"abstract":"A novel single layered fractal spiral capacitor has been designed using fractal geometry. The simulation results carried out by High Frequency Structural Simulator. The simulation results shows fractal spiral capacitor provides10.3% improvement in Capacitance, 52.4% improvement in Q factor and 20% improvement in self resonant frequency over standard spiral capacitor.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124719317","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 : 2016-02-25DOI: 10.1109/CMI.2016.7413796
S. Patra, Sourav Banerjee
Precursor to Damage state quantification in composite material is extremely challenging in the field of structural health monitoring (SHM). Conventional ultrasonic technique is not able to predict the early damage state; this could lead to catastrophic failure of the structure. So, early state damage detection is very imperative for safety and operation of structure. Composite materials experience different type of loading condition (e.g., Tension, torsion bending, etc.) during its operation in extreme environment. Precursor to damage in the composite material can appear in the form matrix cracking, fiber breakage and delamination. In this work, we presented an on board damage detection technique for precursor damage state quantification of Carbon fiber composite material (CFRP). An American society of testing and materials (ASTM) standard specimen was tested under tensor-torsion fatigue lading. Pitch-catch experiments were performed at a regular interval of 10,000 cycles and ultrasonic imaging were performed by using scanning acoustic microscope (SAM) to examine the onset of damage on surface as well as inside the material. Optical microscopy was also performed to examine the damage onset on the surface of the material. Advance signal processing techniques such as Discrete Fourier Transform (DFT), Short-time Fourier transform (STFT) and Continuous Wavelet Transform (CWT) were performed to analyze the sensor signal for extract information of damage growth with fatigue loading to prove that the precursor damage quantification is possible in online SHM.
{"title":"Ultrasonic measurement and detection of precursor delamination damage in composite under tension-torsion loading","authors":"S. Patra, Sourav Banerjee","doi":"10.1109/CMI.2016.7413796","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413796","url":null,"abstract":"Precursor to Damage state quantification in composite material is extremely challenging in the field of structural health monitoring (SHM). Conventional ultrasonic technique is not able to predict the early damage state; this could lead to catastrophic failure of the structure. So, early state damage detection is very imperative for safety and operation of structure. Composite materials experience different type of loading condition (e.g., Tension, torsion bending, etc.) during its operation in extreme environment. Precursor to damage in the composite material can appear in the form matrix cracking, fiber breakage and delamination. In this work, we presented an on board damage detection technique for precursor damage state quantification of Carbon fiber composite material (CFRP). An American society of testing and materials (ASTM) standard specimen was tested under tensor-torsion fatigue lading. Pitch-catch experiments were performed at a regular interval of 10,000 cycles and ultrasonic imaging were performed by using scanning acoustic microscope (SAM) to examine the onset of damage on surface as well as inside the material. Optical microscopy was also performed to examine the damage onset on the surface of the material. Advance signal processing techniques such as Discrete Fourier Transform (DFT), Short-time Fourier transform (STFT) and Continuous Wavelet Transform (CWT) were performed to analyze the sensor signal for extract information of damage growth with fatigue loading to prove that the precursor damage quantification is possible in online SHM.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125843909","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 : 2016-01-08DOI: 10.1109/CMI.2016.7413721
A. Singh, B. Pal
This paper presents a generalized solution to the problem of optimal control of systems having an extra set of exogenous inputs besides control inputs. The solution is derived in the framework of linear quadratic control and it is termed `extended linear quadratic regulator (ELQR)'. The ELQR is applied for control of unstable or poorly damped oscillatory dynamics occurring in a power system and is shown to be significantly more cost effective than the classical power system stabilizer (PSS) based approach.
{"title":"An extended linear quadratic regulator and its application for control of power system dynamics","authors":"A. Singh, B. Pal","doi":"10.1109/CMI.2016.7413721","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413721","url":null,"abstract":"This paper presents a generalized solution to the problem of optimal control of systems having an extra set of exogenous inputs besides control inputs. The solution is derived in the framework of linear quadratic control and it is termed `extended linear quadratic regulator (ELQR)'. The ELQR is applied for control of unstable or poorly damped oscillatory dynamics occurring in a power system and is shown to be significantly more cost effective than the classical power system stabilizer (PSS) based approach.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114872759","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 : 2016-01-08DOI: 10.1109/CMI.2016.7413793
Ankur Majumdar, B. Pal
State estimation has become an important task in modern energy/distribution management systems. However, the state estimation is not very popular in modern unbalanced three-phase distribution systems. This paper proposes a method for three-phase state estimation with detailed three-phase modelling of system components including switches and star and delta connected loads. This method is then tested on a standard IEEE 13-bus system and the results are compared with load flow results.
{"title":"A three-phase state estimation in unbalanced distribution networks with switch modelling","authors":"Ankur Majumdar, B. Pal","doi":"10.1109/CMI.2016.7413793","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413793","url":null,"abstract":"State estimation has become an important task in modern energy/distribution management systems. However, the state estimation is not very popular in modern unbalanced three-phase distribution systems. This paper proposes a method for three-phase state estimation with detailed three-phase modelling of system components including switches and star and delta connected loads. This method is then tested on a standard IEEE 13-bus system and the results are compared with load flow results.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121183169","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 : 2016-01-01DOI: 10.1109/CMI.2016.7413716
M. Young, R. Bhattacharya
In this paper we present a novel algorithm for estimating system parameters of arbitrary aerial manipulators. We abstract an aerial manipulator as a rigid body with forces and torques applied at arbitrary locations. It is also assumed that there are sensors that measure forces, accelerations and angular velocities at these locations. The problem studied here is to fuse these sensor data in real time to estimate mass, location of center of gravity, moment of inertia matrix and the locations where these forces are applied. We analytically derive expressions that relate these quantities to the sensor data instantly or over consecutive samples. We also characterize the motion of the manipulator for which such estimates are impossible to obtain. This characterization allows us to define maneuvers for the aerial manipulator for which we can always determine the rigid body parameters. The algorithm is successfully demonstrated on a quad-rotor system with a moving arm, which causes real-time variation in the inertia matrix and the center-of-gravity location.
{"title":"Real-time parameter estimation for arbitrary aerial manipulators","authors":"M. Young, R. Bhattacharya","doi":"10.1109/CMI.2016.7413716","DOIUrl":"https://doi.org/10.1109/CMI.2016.7413716","url":null,"abstract":"In this paper we present a novel algorithm for estimating system parameters of arbitrary aerial manipulators. We abstract an aerial manipulator as a rigid body with forces and torques applied at arbitrary locations. It is also assumed that there are sensors that measure forces, accelerations and angular velocities at these locations. The problem studied here is to fuse these sensor data in real time to estimate mass, location of center of gravity, moment of inertia matrix and the locations where these forces are applied. We analytically derive expressions that relate these quantities to the sensor data instantly or over consecutive samples. We also characterize the motion of the manipulator for which such estimates are impossible to obtain. This characterization allows us to define maneuvers for the aerial manipulator for which we can always determine the rigid body parameters. The algorithm is successfully demonstrated on a quad-rotor system with a moving arm, which causes real-time variation in the inertia matrix and the center-of-gravity location.","PeriodicalId":244262,"journal":{"name":"2016 IEEE First International Conference on Control, Measurement and Instrumentation (CMI)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129096845","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：