Pub Date : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786542
Armin Choopani, M. Fakharzadeh, A. Safarian
In this paper, a low power active phase shifter in 0.18 µm CMOS technology, operating from 5 to 6 GHz, for WLAN applications is presented. Design equations for this novel structure, which consists of two current steering stages, transconductance stage and DACs, are derived, thoroughly. This phase shifter has a range of 360° with 5.625° phase resolution. The power consumption is 35 mW. The RMS phase error is only 0.3°. The simulated power gain, input P1dB, and NF are 4 dB, −0.8 dBm and 6 dB, respectively.
{"title":"5–6 GHz Dual-Vector Phase Shifter in 0.18 µm LID CMOS","authors":"Armin Choopani, M. Fakharzadeh, A. Safarian","doi":"10.1109/IranianCEE.2019.8786542","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786542","url":null,"abstract":"In this paper, a low power active phase shifter in 0.18 µm CMOS technology, operating from 5 to 6 GHz, for WLAN applications is presented. Design equations for this novel structure, which consists of two current steering stages, transconductance stage and DACs, are derived, thoroughly. This phase shifter has a range of 360° with 5.625° phase resolution. The power consumption is 35 mW. The RMS phase error is only 0.3°. The simulated power gain, input P1dB, and NF are 4 dB, −0.8 dBm and 6 dB, respectively.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"47 1","pages":"82-86"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73431161","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786632
Pooya Borzou, J. Ghaisari, I. Izadi, Y. Gheisari
Transforming Growth Factor (TGF) β signalling pathway is a key regulator of a variety of biological processes in physiological and pathological conditions. In spite of numerous investigations, the dynamics of this complex pathway is largely unknown. Hence, developing mathematical models can pave the way for discovering novel therapeutics. The pathway model has unknown parameters that could be estimated using experimental data. Nonlinear least square methods are commonly used to solve this problem. Because of the difficulties of measuring biological data and its high cost, most of the experiments on this pathway have few data samples. This makes parameter estimation harder and in some cases, with non-unique solutions. In this paper, first a model of TGFβ pathway and its parameters are chosen from the literature. After simulation, model outputs are sampled and used to estimate model parameters. A small number of samples are selected to emulate experimental data. After estimating model parameters multiple times with different initial points, estimation results are compared with the actual value of each parameter by analysing its probability distribution function. In addition, an iterative Levenberg-Marquardt algorithm (LMA) method is proposed in which parameters are divided into groups depending on the state variables they affect. Then, only one group of parameters is estimated in each iteration. Simulation results show the efficiency of the proposed method. By testing the method on the TGFβ model it is shown that it is able to find the optimum point of model residual and solves big network estimation problems with less computation cost.
{"title":"An iterative LMA method for parameter estimation in dynamic modeling of TGFβ pathway using ODE","authors":"Pooya Borzou, J. Ghaisari, I. Izadi, Y. Gheisari","doi":"10.1109/IranianCEE.2019.8786632","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786632","url":null,"abstract":"Transforming Growth Factor (TGF) β signalling pathway is a key regulator of a variety of biological processes in physiological and pathological conditions. In spite of numerous investigations, the dynamics of this complex pathway is largely unknown. Hence, developing mathematical models can pave the way for discovering novel therapeutics. The pathway model has unknown parameters that could be estimated using experimental data. Nonlinear least square methods are commonly used to solve this problem. Because of the difficulties of measuring biological data and its high cost, most of the experiments on this pathway have few data samples. This makes parameter estimation harder and in some cases, with non-unique solutions. In this paper, first a model of TGFβ pathway and its parameters are chosen from the literature. After simulation, model outputs are sampled and used to estimate model parameters. A small number of samples are selected to emulate experimental data. After estimating model parameters multiple times with different initial points, estimation results are compared with the actual value of each parameter by analysing its probability distribution function. In addition, an iterative Levenberg-Marquardt algorithm (LMA) method is proposed in which parameters are divided into groups depending on the state variables they affect. Then, only one group of parameters is estimated in each iteration. Simulation results show the efficiency of the proposed method. By testing the method on the TGFβ model it is shown that it is able to find the optimum point of model residual and solves big network estimation problems with less computation cost.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"151 1","pages":"1140-1144"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73702477","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786766
R. Safaeian, H. Heydari
In this paper, for optimal using of magnetic materials in passive magnetic bearings, two modifications in passive magnetic bearing structure are investigated. These modifications include using arbitrary size PMs and air intervals between them. Two configurations of opposite magnetization structure (standard) and rotating magnetization structure (Halbach) are studied in this paper. The 2D planner model is used to calculate the magnetic fields and stiffness between two infinite rods of magnet. A straight formula for stiffness is achieved for both standard and Halbach stacking. The optimization will be performed in order to obtain maximum stiffness per magnet volume ratio.
{"title":"Optimal Design of Passive Permanent Magnet Bearings","authors":"R. Safaeian, H. Heydari","doi":"10.1109/IranianCEE.2019.8786766","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786766","url":null,"abstract":"In this paper, for optimal using of magnetic materials in passive magnetic bearings, two modifications in passive magnetic bearing structure are investigated. These modifications include using arbitrary size PMs and air intervals between them. Two configurations of opposite magnetization structure (standard) and rotating magnetization structure (Halbach) are studied in this paper. The 2D planner model is used to calculate the magnetic fields and stiffness between two infinite rods of magnet. A straight formula for stiffness is achieved for both standard and Halbach stacking. The optimization will be performed in order to obtain maximum stiffness per magnet volume ratio.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"14 1","pages":"458-463"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84408936","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786651
Babak Janjan, V. Ahmadi, D. Fathi, M. Heidari
In this paper, we present a highly efficient second harmonic generation in near-infrared region, from λ = 1.55 μm to λ=0.775 μm, using hydrogenated-amorphous silicon slot waveguide coated with a nonlinear polymer. The necessary phase matching condition is fulfilled through quasi-phase matching by periodically poling the nonlinear polymer filled the slot region of the waveguide. A conversion efficiency of P2ωlPω = 12 % is predicted for a low pump power of 10 mW in a propagation distance of 2.4 mm. This result is comparable to the previously reported values but with a smaller device length and lower pump power.
{"title":"Efficient Wide Range Telecom Wavelength Conversion in Hydrogenated-Amorphous Silicon-Polymer Waveguide","authors":"Babak Janjan, V. Ahmadi, D. Fathi, M. Heidari","doi":"10.1109/IranianCEE.2019.8786651","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786651","url":null,"abstract":"In this paper, we present a highly efficient second harmonic generation in near-infrared region, from λ = 1.55 μm to λ=0.775 μm, using hydrogenated-amorphous silicon slot waveguide coated with a nonlinear polymer. The necessary phase matching condition is fulfilled through quasi-phase matching by periodically poling the nonlinear polymer filled the slot region of the waveguide. A conversion efficiency of P2ωlPω = 12 % is predicted for a low pump power of 10 mW in a propagation distance of 2.4 mm. This result is comparable to the previously reported values but with a smaller device length and lower pump power.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"63 1","pages":"46-49"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84685134","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786718
Ali Noroozifar, I. Izadi
Alarm system is a vital component of industrial complexes and process plants. Once a fault occurs in a plant, some variables exceed their predetermined limits, which will trigger an alarm. However, because of immense interconnection between process variables, a fault might cause many alarms. This makes the task of finding the root cause fault difficult. One approach to find the root cause is to analyze time-trend of process data. This approach, however, is time and resource consuming and requires advanced infrastructure. In this paper, first the root cause analysis methods are reviewed. Then a technique is proposed to identify the root cause of a fault using alarm data only. The method is applied on the Tennessee Eastman process as a well-known benchmark.
{"title":"Root Cause Analysis of Process Faults Using Alarm Data","authors":"Ali Noroozifar, I. Izadi","doi":"10.1109/IranianCEE.2019.8786718","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786718","url":null,"abstract":"Alarm system is a vital component of industrial complexes and process plants. Once a fault occurs in a plant, some variables exceed their predetermined limits, which will trigger an alarm. However, because of immense interconnection between process variables, a fault might cause many alarms. This makes the task of finding the root cause fault difficult. One approach to find the root cause is to analyze time-trend of process data. This approach, however, is time and resource consuming and requires advanced infrastructure. In this paper, first the root cause analysis methods are reviewed. Then a technique is proposed to identify the root cause of a fault using alarm data only. The method is applied on the Tennessee Eastman process as a well-known benchmark.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"63 1","pages":"1118-1122"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82188547","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786452
Mohammad Heidary Takaby, S. Sayedi
With the advancement of technology in recent decades and increase of integrated circuits density, the importance of power consumption in design of electronic circuits is steadily increasing. Among the four basic and widely used computational units, division unit has most complexity, so design improvement of this unit has a significant impact on the hardware complexity of the related system. To implement the circuit, GDI is a suitable logic structure to be used. In this structure, the design of complex circuits can be done with less number of transistors and less power consumption. In some applications in digital signal and image processing like machine vision and machine learning, if there are some inaccuracies in calculations, the system still has capability of producing output in an acceptable accuracy range. In this paper, an unsigned approximate division algorithm is proposed and implemented in GDI structure with the aim of reducing the hardware complexity of divider unit. Simulation results reveal that proposed divider implemented in GDI structure compared to its CMOS counterpart show a reduction of 61% in dynamic power consumption, 41% in delay and 69% in area.
{"title":"Low Power Approximate Unsigned Divider Design Using Gate Diffusion Input Logic","authors":"Mohammad Heidary Takaby, S. Sayedi","doi":"10.1109/IranianCEE.2019.8786452","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786452","url":null,"abstract":"With the advancement of technology in recent decades and increase of integrated circuits density, the importance of power consumption in design of electronic circuits is steadily increasing. Among the four basic and widely used computational units, division unit has most complexity, so design improvement of this unit has a significant impact on the hardware complexity of the related system. To implement the circuit, GDI is a suitable logic structure to be used. In this structure, the design of complex circuits can be done with less number of transistors and less power consumption. In some applications in digital signal and image processing like machine vision and machine learning, if there are some inaccuracies in calculations, the system still has capability of producing output in an acceptable accuracy range. In this paper, an unsigned approximate division algorithm is proposed and implemented in GDI structure with the aim of reducing the hardware complexity of divider unit. Simulation results reveal that proposed divider implemented in GDI structure compared to its CMOS counterpart show a reduction of 61% in dynamic power consumption, 41% in delay and 69% in area.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"119 1","pages":"66-70"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79420401","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786700
A. K. Horestani, F. Sadeghikia, Z. Shaterian
This paper presents a method to design low cost microwave phase shifters in substrate-integrated waveguide (SIW) technology. The proposed phase shifters are based on removing some regions of the SIW substrate as well as top and bottom metal planes. It is shown that by proper selection of the position and orientation of the introduced air strips maximum possible phase shift may be achieved while radiation leakage is precluded. On that bases a broadband phase shifter is designed. The proposed design provides a 45° phase shift with a return loss higher than 17 dB across the frequency band of 10 to 14 GHz.
{"title":"A Broadband Fixed Phase Shifter in Substrate Integrated Waveguide Technology","authors":"A. K. Horestani, F. Sadeghikia, Z. Shaterian","doi":"10.1109/IranianCEE.2019.8786700","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786700","url":null,"abstract":"This paper presents a method to design low cost microwave phase shifters in substrate-integrated waveguide (SIW) technology. The proposed phase shifters are based on removing some regions of the SIW substrate as well as top and bottom metal planes. It is shown that by proper selection of the position and orientation of the introduced air strips maximum possible phase shift may be achieved while radiation leakage is precluded. On that bases a broadband phase shifter is designed. The proposed design provides a 45° phase shift with a return loss higher than 17 dB across the frequency band of 10 to 14 GHz.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"45 3 1","pages":"1576-1578"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79452805","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786396
Seyyed Mohammad Sadegh Seyyedi, M. Pourfath
This work presents a comprehensive study on adsorption properties of CO, H2S, NH3, and NO on monolayer titanium trisulfide, by employing first-principle calculations. The optimized atomic sites, directions and the associated adsorption mechanisms are carefully analyzed. Transfer of charge between the gas molecule and the layer modifies the layer's resistance. Therefore, by evaluating the resistance variation, the concentration of gas molecules can be determined. The results indicate that nitrogen-based molecules especially NO, show the highest sensitivity among the studied gases. The results show that monolayer titanium trisulfide is suitable candidates for sensitive gas sensing applications.
{"title":"Titanium Trisulfide as Sensitive Gas Sensor","authors":"Seyyed Mohammad Sadegh Seyyedi, M. Pourfath","doi":"10.1109/IranianCEE.2019.8786396","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786396","url":null,"abstract":"This work presents a comprehensive study on adsorption properties of CO, H2S, NH3, and NO on monolayer titanium trisulfide, by employing first-principle calculations. The optimized atomic sites, directions and the associated adsorption mechanisms are carefully analyzed. Transfer of charge between the gas molecule and the layer modifies the layer's resistance. Therefore, by evaluating the resistance variation, the concentration of gas molecules can be determined. The results indicate that nitrogen-based molecules especially NO, show the highest sensitivity among the studied gases. The results show that monolayer titanium trisulfide is suitable candidates for sensitive gas sensing applications.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"55 1","pages":"97-100"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84368382","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786426
M. Pendar, Hamed Sarjan
The technology of ocean Wave Energy Converters (WEC) has dramatically developed during recent years. These WECs apply various power take-off (PTO) system which are continuing to improve. Different types of PTOs such as hydroelectric, electromagnetic and air turbine systems have been introduced in different relevant studies. The most significant challenge in ocean WECs is related to different power take-off systems. This work introduces a new development of a WEC from a concept of taking energy from ocean waves to the prototype stage and testing along the southern coast of the Caspian Sea. The point absorber Single-body WEC, which is a popular design, was selected to model the proposed system under different conditions, including irregular and regular waves. The bi-directional motion of a wave is converted to the unidirectional motion which rotates the generator by the proposed PTO system that named “Mechanical Gear Rectifier” (MGR), in which a new pinion system is applied. A prototype of our small-scale WEC was designed, built, and then a close analysis of it is performed. Finally, the performance of proposed WEC carefully tested in different wave conditions (regular and irregular waves). The simulation results demonstrate the high efficiency of the proposed MGR-WEC.
{"title":"Design, Fabrication, and Testing of a Shore-line Wave Energy Converter with Mechanical Gear Motion Rectifier","authors":"M. Pendar, Hamed Sarjan","doi":"10.1109/IranianCEE.2019.8786426","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786426","url":null,"abstract":"The technology of ocean Wave Energy Converters (WEC) has dramatically developed during recent years. These WECs apply various power take-off (PTO) system which are continuing to improve. Different types of PTOs such as hydroelectric, electromagnetic and air turbine systems have been introduced in different relevant studies. The most significant challenge in ocean WECs is related to different power take-off systems. This work introduces a new development of a WEC from a concept of taking energy from ocean waves to the prototype stage and testing along the southern coast of the Caspian Sea. The point absorber Single-body WEC, which is a popular design, was selected to model the proposed system under different conditions, including irregular and regular waves. The bi-directional motion of a wave is converted to the unidirectional motion which rotates the generator by the proposed PTO system that named “Mechanical Gear Rectifier” (MGR), in which a new pinion system is applied. A prototype of our small-scale WEC was designed, built, and then a close analysis of it is performed. Finally, the performance of proposed WEC carefully tested in different wave conditions (regular and irregular waves). The simulation results demonstrate the high efficiency of the proposed MGR-WEC.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"8 1","pages":"2100-2105"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85369972","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 : 2019-04-01DOI: 10.1109/IranianCEE.2019.8786755
Mehran Hazer-Sahlabadi, A. Abdipour, A. Mohammadi
In this paper, a single front-end seven-port receiver is proposed and analyzed for MIMO systems based on Alamouti coding. This architecture uses a single front-end which reduces the complexity in the RF section. The performances of our proposed seven-port receiver is assesed in term of two input QPSK modulated signals and bit error rates. The obtained results demonstrate that the proposed seven-port receiver can be a candidate for using in MIMO communication systems.
{"title":"A Seven-Port Receiver for MIMO 2x2 Communication Systems","authors":"Mehran Hazer-Sahlabadi, A. Abdipour, A. Mohammadi","doi":"10.1109/IranianCEE.2019.8786755","DOIUrl":"https://doi.org/10.1109/IranianCEE.2019.8786755","url":null,"abstract":"In this paper, a single front-end seven-port receiver is proposed and analyzed for MIMO systems based on Alamouti coding. This architecture uses a single front-end which reduces the complexity in the RF section. The performances of our proposed seven-port receiver is assesed in term of two input QPSK modulated signals and bit error rates. The obtained results demonstrate that the proposed seven-port receiver can be a candidate for using in MIMO communication systems.","PeriodicalId":6683,"journal":{"name":"2019 27th Iranian Conference on Electrical Engineering (ICEE)","volume":"20 1","pages":"1382-1386"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81759012","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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