Pub Date : 2004-12-01DOI: 10.1109/ICSENS.2004.1426228
Y. Tamai, S. Kagami, Y. Amemiya, Y. Sasaki, H. Mizoguchi, T. Takano
The paper describes a "32-channel circular microphone array" which can localize individual sounds from many sound sources in 360 degrees. This microphone array is used in robot audition. Because the microphone array has many microphones, it has tolerance for not only environmental noise but also noise caused by the robot. Moreover, it can localize and separate sound sources in all directions. Sound localization by the microphone array is achieved by a delay-and-sum beamforming algorithm. A dedicated IEEE 1394 32-channel analog-to-digital (A/D) board with microphone amplifier was developed for the microphone array in order to keep a fixed cycle such as a sampling rate of 11 kHz. Sound localization is evaluated by a sound pressure distribution map. A sound localization experiment was conducted with the microphone array mounted on a Nomad mobile robot. One discontinuous sound source, such as music, can be localized accurately. The error margin of sound localization is within about 3/spl deg/. In the future, we will place our microphone array on humanoid robots to confirm system performance in human environment.
{"title":"Circular microphone array for robot's audition","authors":"Y. Tamai, S. Kagami, Y. Amemiya, Y. Sasaki, H. Mizoguchi, T. Takano","doi":"10.1109/ICSENS.2004.1426228","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426228","url":null,"abstract":"The paper describes a \"32-channel circular microphone array\" which can localize individual sounds from many sound sources in 360 degrees. This microphone array is used in robot audition. Because the microphone array has many microphones, it has tolerance for not only environmental noise but also noise caused by the robot. Moreover, it can localize and separate sound sources in all directions. Sound localization by the microphone array is achieved by a delay-and-sum beamforming algorithm. A dedicated IEEE 1394 32-channel analog-to-digital (A/D) board with microphone amplifier was developed for the microphone array in order to keep a fixed cycle such as a sampling rate of 11 kHz. Sound localization is evaluated by a sound pressure distribution map. A sound localization experiment was conducted with the microphone array mounted on a Nomad mobile robot. One discontinuous sound source, such as music, can be localized accurately. The error margin of sound localization is within about 3/spl deg/. In the future, we will place our microphone array on humanoid robots to confirm system performance in human environment.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79994685","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 : 2004-12-01DOI: 10.1109/ICSENS.2004.1426268
M. Kikuchi, K. Omori, S. Shiratori
An ammonia gas sensor which has a high sensitivity in robust conditions has been investigated. A nanoporous thin film consisting of polyelectrolytes and sheet particulate /spl alpha/-ZrP was assembled by a layer-by-layer self assembly method on the electrode of a quartz crystal microbalance (QCM). This QCM sensor showed an eight times higher sensitivity than that of QCM deposited with /spl alpha/-ZrP by a casting method in low relative humidity. This means that the polyelectrolytes worked not only as a stabilizer to form a porous structure, but also as a material to keep moisture. Consequently, we considered that the gas sensitivity of the thin film is increased for other hydrophilic gases.
{"title":"Quartz crystal microbalance (QCM) sensor for ammonia gas using clay/polyelectrolyte layer-by-layer self-assembly film","authors":"M. Kikuchi, K. Omori, S. Shiratori","doi":"10.1109/ICSENS.2004.1426268","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426268","url":null,"abstract":"An ammonia gas sensor which has a high sensitivity in robust conditions has been investigated. A nanoporous thin film consisting of polyelectrolytes and sheet particulate /spl alpha/-ZrP was assembled by a layer-by-layer self assembly method on the electrode of a quartz crystal microbalance (QCM). This QCM sensor showed an eight times higher sensitivity than that of QCM deposited with /spl alpha/-ZrP by a casting method in low relative humidity. This means that the polyelectrolytes worked not only as a stabilizer to form a porous structure, but also as a material to keep moisture. Consequently, we considered that the gas sensitivity of the thin film is increased for other hydrophilic gases.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90490818","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 : 2004-10-24DOI: 10.1109/ICSENS.2004.1426326
M. Baumbach, A. Schutze, F. Cheng, S. Kelly, H. Delprat, F. Parret, P. Ménini, K. Soulantica, B. Chaudret, A. Maisonnat
Semiconductor gas sensors have a proven potential for low cost and highly sensitive gas detection. However, selectivity remains one of the main problems for many applications. We report a new kind of mesoporous ceramic filter with nanoscale pores. The ceramic filter offers mechanical protection and can help to boost selectivity enormously through selective gas absorption. The developed nano-technological filters are based on mesoporous secondary and ternary silicon nitride derivatives with a defined particle size and are prepared via a new sol gel route. The interaction of the filters with CO, NO/sub 2/, H/sub 2/ and propane were evaluated using broadband sensors. Highly selective absorption was observed for different gases, especially NO/sub 2/. From these experiments a filter efficiency value is calculated, which allows easy selection of suitable filter materials for different applications.
{"title":"Novel mesoporous filters for selective gas absorption","authors":"M. Baumbach, A. Schutze, F. Cheng, S. Kelly, H. Delprat, F. Parret, P. Ménini, K. Soulantica, B. Chaudret, A. Maisonnat","doi":"10.1109/ICSENS.2004.1426326","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426326","url":null,"abstract":"Semiconductor gas sensors have a proven potential for low cost and highly sensitive gas detection. However, selectivity remains one of the main problems for many applications. We report a new kind of mesoporous ceramic filter with nanoscale pores. The ceramic filter offers mechanical protection and can help to boost selectivity enormously through selective gas absorption. The developed nano-technological filters are based on mesoporous secondary and ternary silicon nitride derivatives with a defined particle size and are prepared via a new sol gel route. The interaction of the filters with CO, NO/sub 2/, H/sub 2/ and propane were evaluated using broadband sensors. Highly selective absorption was observed for different gases, especially NO/sub 2/. From these experiments a filter efficiency value is calculated, which allows easy selection of suitable filter materials for different applications.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74210774","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 : 2004-10-24DOI: 10.1109/ICSENS.2004.1426171
Jinchun Wang, J. Chun, Jinkyu Park, Yong-Hwan Kim
We propose a new spinning object angular velocity estimation method using an imaging sensor. Most of the previous algorithms require a knowledge of the attitude or of the body vector measurements. For a fast spinning object, however, the body vector measurement is a difficult task due to flows of the object image. To overcome this difficulty, we search for the angular velocity which minimizes the cost function defined by the Euclidean distance differences of the observed star traces and the derivative star traces of an estimated angular velocity. With this formulation, angular velocity determination becomes a kind of minimization problem in 3D of the angular velocity vector. To reduce the search dimensions and use search techniques in 1D, we randomly sample points on the star traces and these random points assign a constraint to the possible angular velocity vector according to the kinematics equation. A numerical simulation for fast spinning cases is carried out to establish the results.
{"title":"Angular velocity estimation of fast spinning object using an imaging sensor","authors":"Jinchun Wang, J. Chun, Jinkyu Park, Yong-Hwan Kim","doi":"10.1109/ICSENS.2004.1426171","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426171","url":null,"abstract":"We propose a new spinning object angular velocity estimation method using an imaging sensor. Most of the previous algorithms require a knowledge of the attitude or of the body vector measurements. For a fast spinning object, however, the body vector measurement is a difficult task due to flows of the object image. To overcome this difficulty, we search for the angular velocity which minimizes the cost function defined by the Euclidean distance differences of the observed star traces and the derivative star traces of an estimated angular velocity. With this formulation, angular velocity determination becomes a kind of minimization problem in 3D of the angular velocity vector. To reduce the search dimensions and use search techniques in 1D, we randomly sample points on the star traces and these random points assign a constraint to the possible angular velocity vector according to the kinematics equation. A numerical simulation for fast spinning cases is carried out to establish the results.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86622114","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 : 2004-10-24DOI: 10.1109/ICSENS.2004.1426284
M. Graf, U. Frey, P. Reichel, S. Taschini, N. Bârsan, U. Weimar, A. Hierlemann
In this paper, measurements of environmentally relevant gases (CO, CH/sub 4/ and NO/sub 2/) with a novel single-chip digital microhotplate array are presented. The array consists of three tin-oxide-coated microhotplates with integrated MOS-transistor heaters and specifically designed circuitry. The programmable digital temperature controllers enable individual regulation of the microhotplate temperatures in continuous or dynamic mode. Nanocrystalline tin-oxide thick films with different Pd dopings (undoped, 0.2 wt% and 3 wt%) were tested. Excellent discrimination between the three gases was achieved with detection limits of less than 1 ppm for CO, 100 ppm for CH/sub 4/ (40% RH) and 10 ppb of NO/sub 2/ (30%/70% RH).
{"title":"Monitoring of environmentally monolithic metal-oxide relevant gases by a digital microsensor array","authors":"M. Graf, U. Frey, P. Reichel, S. Taschini, N. Bârsan, U. Weimar, A. Hierlemann","doi":"10.1109/ICSENS.2004.1426284","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426284","url":null,"abstract":"In this paper, measurements of environmentally relevant gases (CO, CH/sub 4/ and NO/sub 2/) with a novel single-chip digital microhotplate array are presented. The array consists of three tin-oxide-coated microhotplates with integrated MOS-transistor heaters and specifically designed circuitry. The programmable digital temperature controllers enable individual regulation of the microhotplate temperatures in continuous or dynamic mode. Nanocrystalline tin-oxide thick films with different Pd dopings (undoped, 0.2 wt% and 3 wt%) were tested. Excellent discrimination between the three gases was achieved with detection limits of less than 1 ppm for CO, 100 ppm for CH/sub 4/ (40% RH) and 10 ppb of NO/sub 2/ (30%/70% RH).","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80474935","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 : 2004-10-24DOI: 10.1109/ICSENS.2004.1426308
N. Pelletier, B. Bêche, L. Camberlein, E. Gaviot, N. Giordani, J. Zyss
A new approach to designing heat sensors is presented. The basic principle relies on the differential thermal behavior regarding both active arms of a micro Mach-Zehnder interferometer (MZI). Based on modeling results, an experimental sensor is realised as an integrated device made up of SU-8 polymer mounted on a standard silicon wafer. When subjected to a radiant source, such as laser light (980 nm), injected across the cleaved input face of the MZI, the significant change of output signal allows us to consider a new approach to measuring radiant heat flow rate. Experimental results are given regarding the obtained phase shift against the subjected thermal power. According to the modeling results, one can expect new highly sensitive devices to be developed in the next coming years, with numerous prospective industrial applications.
{"title":"Integrated optical Mach-Zehnder on SU-8 polymer for designing thermal sensors","authors":"N. Pelletier, B. Bêche, L. Camberlein, E. Gaviot, N. Giordani, J. Zyss","doi":"10.1109/ICSENS.2004.1426308","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426308","url":null,"abstract":"A new approach to designing heat sensors is presented. The basic principle relies on the differential thermal behavior regarding both active arms of a micro Mach-Zehnder interferometer (MZI). Based on modeling results, an experimental sensor is realised as an integrated device made up of SU-8 polymer mounted on a standard silicon wafer. When subjected to a radiant source, such as laser light (980 nm), injected across the cleaved input face of the MZI, the significant change of output signal allows us to consider a new approach to measuring radiant heat flow rate. Experimental results are given regarding the obtained phase shift against the subjected thermal power. According to the modeling results, one can expect new highly sensitive devices to be developed in the next coming years, with numerous prospective industrial applications.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87409363","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 : 2004-10-24DOI: 10.1109/ICSENS.2004.1426449
S. Gunthner, K. Kapser, M. Rose, B. Hartmann, M. Kluge, U. Schmid, H. Seidel
The paper concerns a silicon micromachined tuning fork gyroscope, which is driven via two piezo-electric thin film actuators. The device responds to an external angular rate by a torsional motion around its sensitive axis due to the Coriolis effect. The shear strain in the upper torsional stem, which is proportional to the angular rate, is detected via a piezo-resistive read-out structure. Due to a change in resistivity at the strain sensitive elements, an electronic signal is generated. The change in voltage, however, does not solely derive from the torsional strain induced by the response of the device to the angular rate. In addition, there are unwanted contributions from the drive motion, e.g., from mechanical imbalance and from asymmetries of the piezoelectric excitation induced by fabrication tolerances. These effects disturb the sensor signal with varying contributions in amplitude and phase. They are identified and compared to results of FEM simulations. Suggestions for an optimized read-out structure are presented.
{"title":"Analysis of piezo-resistive read-out signals for a silicon tuning fork gyroscope","authors":"S. Gunthner, K. Kapser, M. Rose, B. Hartmann, M. Kluge, U. Schmid, H. Seidel","doi":"10.1109/ICSENS.2004.1426449","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426449","url":null,"abstract":"The paper concerns a silicon micromachined tuning fork gyroscope, which is driven via two piezo-electric thin film actuators. The device responds to an external angular rate by a torsional motion around its sensitive axis due to the Coriolis effect. The shear strain in the upper torsional stem, which is proportional to the angular rate, is detected via a piezo-resistive read-out structure. Due to a change in resistivity at the strain sensitive elements, an electronic signal is generated. The change in voltage, however, does not solely derive from the torsional strain induced by the response of the device to the angular rate. In addition, there are unwanted contributions from the drive motion, e.g., from mechanical imbalance and from asymmetries of the piezoelectric excitation induced by fabrication tolerances. These effects disturb the sensor signal with varying contributions in amplitude and phase. They are identified and compared to results of FEM simulations. Suggestions for an optimized read-out structure are presented.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77465415","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 : 2004-10-24DOI: 10.1109/ICSENS.2004.1426301
A. Fuchs, W. Hauselhofer, G. Brasseur
A crack detection and localization sensor for wire feed-through applications is presented where longitudinal cracks can be detected. The compensation of the wire position, used to enhance accuracy and repeatability, is described and measurement results are discussed.
{"title":"Design of an eddy current based crack detection sensor for wire processing applications","authors":"A. Fuchs, W. Hauselhofer, G. Brasseur","doi":"10.1109/ICSENS.2004.1426301","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426301","url":null,"abstract":"A crack detection and localization sensor for wire feed-through applications is presented where longitudinal cracks can be detected. The compensation of the wire position, used to enhance accuracy and repeatability, is described and measurement results are discussed.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89941466","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 : 2004-10-24DOI: 10.1109/ICSENS.2004.1426462
F. van der Heijden, S. van Koningsveld, P. Regtien
The problem considered is the estimation of the ToF (time-of-flight) of an acoustic tone burst in a reflective environment. Secondary echoes cause a complex interference pattern. Only the ToF of the first echo is of interest. Conventional matched filtering (MF) cannot cope with overlapping echoes. An explicit model for overlapping echoes leads to a generalized MF consisting of a parallel bank of filters rather than just a single filter. The new method is evaluated with a dataset of 150 records of observed waveforms using 3-fold cross validation.
{"title":"Time-of-flight estimation using extended matched filtering","authors":"F. van der Heijden, S. van Koningsveld, P. Regtien","doi":"10.1109/ICSENS.2004.1426462","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426462","url":null,"abstract":"The problem considered is the estimation of the ToF (time-of-flight) of an acoustic tone burst in a reflective environment. Secondary echoes cause a complex interference pattern. Only the ToF of the first echo is of interest. Conventional matched filtering (MF) cannot cope with overlapping echoes. An explicit model for overlapping echoes leads to a generalized MF consisting of a parallel bank of filters rather than just a single filter. The new method is evaluated with a dataset of 150 records of observed waveforms using 3-fold cross validation.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87855158","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 : 2004-10-01DOI: 10.1109/ICSENS.2004.1426086
T. Liang, M. Friedrich, D. Lala, K. Ozanyan
In this paper, we report on a portable, compact and inexpensive fluorescence sensor for monitoring the ageing of retail lubricant oils as a result of the operation in an internal combustion engine. The proposed sensor consists of a UV laser diode, an optical fibre probe for simultaneous excitation and collection of the fluorescence and a USB powered palm-size spectrometer connected to a laptop. The sensor was applied on a set of oil samples, taken from production engines by a leading car manufacturing company, at various mileages. The subtle variations in the spectra, caused by the ageing process of the oil, are resolved using two methods: principle component analysis (PCA) and artificial neural networks (ANN). Their performance is compared with regard to utilization in a portable dedicated system for continuous in-situ monitoring. Because of the "fingerprinting" approach, which avoids detailed interpretation, the sensor has a wide range of application areas.
{"title":"Portable fluorescence sensor for on-line monitoring of lubricant oils","authors":"T. Liang, M. Friedrich, D. Lala, K. Ozanyan","doi":"10.1109/ICSENS.2004.1426086","DOIUrl":"https://doi.org/10.1109/ICSENS.2004.1426086","url":null,"abstract":"In this paper, we report on a portable, compact and inexpensive fluorescence sensor for monitoring the ageing of retail lubricant oils as a result of the operation in an internal combustion engine. The proposed sensor consists of a UV laser diode, an optical fibre probe for simultaneous excitation and collection of the fluorescence and a USB powered palm-size spectrometer connected to a laptop. The sensor was applied on a set of oil samples, taken from production engines by a leading car manufacturing company, at various mileages. The subtle variations in the spectra, caused by the ageing process of the oil, are resolved using two methods: principle component analysis (PCA) and artificial neural networks (ANN). Their performance is compared with regard to utilization in a portable dedicated system for continuous in-situ monitoring. Because of the \"fingerprinting\" approach, which avoids detailed interpretation, the sensor has a wide range of application areas.","PeriodicalId":20476,"journal":{"name":"Proceedings of IEEE Sensors, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81137960","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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