To clarify the existence of elements that can neutralize acid rain on the leaf surfaces of several tree species, a SEM-EDX analysis of aerosol particles in the atmosphere and on leaf surfaces was conducted in the summer and fall seasons of 2002. Our results indicated that almost all the aerosol particles collected from the atmosphere predominantly contained a high frequency of the element Si and then of the element Al. Similarly, particles collected from the leaves of several kinds of trees contained mainly Si and Al elements. However, the frequen cies of these particles on the leaf surfaces were not at levels that could effectively neutralize acid rain. In contrast, particles that were collected from leaf surfaces during rainfall contained a 40 ~ 60 percent frequency of the element K. Based on these findings and our previous works, we consider that the element K exuded from the leaves to neutralize acid rain.
{"title":"SEM-EDX Analysis of Aerosol Particles in the Atmosphere and on the Leaf Surfaces","authors":"Yoshiaki Sasaki, K. Kikuchi, Hiroki Sugawara","doi":"10.1541/JAE.24.61","DOIUrl":"https://doi.org/10.1541/JAE.24.61","url":null,"abstract":"To clarify the existence of elements that can neutralize acid rain on the leaf surfaces of several tree species, a SEM-EDX analysis of aerosol particles in the atmosphere and on leaf surfaces was conducted in the summer and fall seasons of 2002. Our results indicated that almost all the aerosol particles collected from the atmosphere predominantly contained a high frequency of the element Si and then of the element Al. Similarly, particles collected from the leaves of several kinds of trees contained mainly Si and Al elements. However, the frequen cies of these particles on the leaf surfaces were not at levels that could effectively neutralize acid rain. In contrast, particles that were collected from leaf surfaces during rainfall contained a 40 ~ 60 percent frequency of the element K. Based on these findings and our previous works, we consider that the element K exuded from the leaves to neutralize acid rain.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"12 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131894496","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}
. Ionospheric data obtained from Ahmedabad are analysed to examine the role of three major Indian earthquakes that occurred at Bihar- Nepal border on 20 August 1988, Latur on 30 September 1993, and Jabalpur on 22 May 1997 on E-layer perturbation. The percent enhancements in the nighttime critical frequency ( foEs) over the monthly median are calculated and their variations are examined from 20 days before to 3 to 4 days after the occurrence of the earthquakes. The results show that the foEs are enhanced 3 - 20 days before the occurrence of the earthquakes during both the pre and post-midnight hours. The effects of magnetic storms are identified but they are not found to vitiate the above results. Various mechanisms, which may be responsible for foEs enhancements, are discussed and the role of intensified electric fields over epicentral zones is emphasized.
{"title":"Ionization enhancements in sporadic E-layers prior to some major Indian earthquakes","authors":"O. P. Singh, Singh Birbal","doi":"10.1541/JAE.24.75","DOIUrl":"https://doi.org/10.1541/JAE.24.75","url":null,"abstract":". Ionospheric data obtained from Ahmedabad are analysed to examine the role of three major Indian earthquakes that occurred at Bihar- Nepal border on 20 August 1988, Latur on 30 September 1993, and Jabalpur on 22 May 1997 on E-layer perturbation. The percent enhancements in the nighttime critical frequency ( foEs) over the monthly median are calculated and their variations are examined from 20 days before to 3 to 4 days after the occurrence of the earthquakes. The results show that the foEs are enhanced 3 - 20 days before the occurrence of the earthquakes during both the pre and post-midnight hours. The effects of magnetic storms are identified but they are not found to vitiate the above results. Various mechanisms, which may be responsible for foEs enhancements, are discussed and the role of intensified electric fields over epicentral zones is emphasized.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121717970","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}
. We have observed electromagnetic waves in VHF (Very High Frequency) band at Tateyama in Chiba prefecture to investigate correlation between the anomalous propagation of FM radio broadcasting waves and earthquakes. A tuning meter· of a commercial FM receiver and a spectrum analyzer were used simultaneously to receive the waves in the frequencies at 77.2 ± 0.5 MHz. We investigated two cases of anomalous propagation of FM radio broadcasting waves. One case showed slow fluctuations with about 10-minute period of baseline level of the tuning meter outputs and the other showed rapid fluctuations with less than I-sec period. We calculated correlation between the output of the tuning meter and the power received in the frequency band with the spectrum analyzer. The results of the spectrum analysis of the observed data reveal that the origins of the baseline fluctuations in these two cases are signals at different frequencies, i.e. the origin of the slow fluctuation is radio waves at 77 .1 MHz from Sendai, while that of the rapid fluctuation is waves at 77 .5 MHz from Niijima. This fact could imply that mechanisms of two cases of fluctuations are different from each other.
{"title":"SPECTRUM ANALYSIS OF ANOMALOUS PROPAGATION OF FM RADIO BROADCASTING WAVES POSSIBLY RELATED TO EARTHQUAKES","authors":"T. Takano, Y. Yaji, K. Sakai","doi":"10.1541/JAE.22.257","DOIUrl":"https://doi.org/10.1541/JAE.22.257","url":null,"abstract":". We have observed electromagnetic waves in VHF (Very High Frequency) band at Tateyama in Chiba prefecture to investigate correlation between the anomalous propagation of FM radio broadcasting waves and earthquakes. A tuning meter· of a commercial FM receiver and a spectrum analyzer were used simultaneously to receive the waves in the frequencies at 77.2 ± 0.5 MHz. We investigated two cases of anomalous propagation of FM radio broadcasting waves. One case showed slow fluctuations with about 10-minute period of baseline level of the tuning meter outputs and the other showed rapid fluctuations with less than I-sec period. We calculated correlation between the output of the tuning meter and the power received in the frequency band with the spectrum analyzer. The results of the spectrum analysis of the observed data reveal that the origins of the baseline fluctuations in these two cases are signals at different frequencies, i.e. the origin of the slow fluctuation is radio waves at 77 .1 MHz from Sendai, while that of the rapid fluctuation is waves at 77 .5 MHz from Niijima. This fact could imply that mechanisms of two cases of fluctuations are different from each other.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129002185","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}
. We present a numerical model of stepped leader growth dur ing dielectric breakdown process in homogenous media. The electrodes and the stepped leader were modelled as conductors surrounded by a homogenous dielectric medium. We took in account the observations of a stepped leader in atmosphere and used a quasi-static approach. To simulate the time space, we alternatingly added a streamer to the leader and solved the system for unknown charges with method of moments, using Galerkin approach. For different values of generalized dielectric temperature kT and initial electrical energy C 0 U 2 /2 the results of the model were interpreted as various kinds of discharges, like corona, cold discharge, and discharges with branched leaders. The results suggest the existence of a single parameter that determines the type of breakdown in the particular class of discharges.
． 本文建立了均匀介质中介电击穿过程阶梯引线生长的数值模型。电极和阶梯引线被模拟为被均匀介电介质包围的导体。我们考虑了阶梯引导者在大气中的观测结果，并采用了准静态方法。为了模拟时间空间，我们在前导上交替增加了一条拖缆，并利用伽辽金方法对系统进行了未知电荷的矩量求解。对于不同的广义介质温度kT和初始电能c0 U 2 /2，模型的结果被解释为电晕、冷放电和支导线放电等多种放电形式。结果表明，在特定类型的放电中，存在一个单一的参数来决定击穿的类型。
{"title":"Numerical Model of Stepped Leader Growth Process in Homogenous Dielectric","authors":"A. Berkopec, V. Valencic","doi":"10.1541/JAE.21.61","DOIUrl":"https://doi.org/10.1541/JAE.21.61","url":null,"abstract":". We present a numerical model of stepped leader growth dur ing dielectric breakdown process in homogenous media. The electrodes and the stepped leader were modelled as conductors surrounded by a homogenous dielectric medium. We took in account the observations of a stepped leader in atmosphere and used a quasi-static approach. To simulate the time space, we alternatingly added a streamer to the leader and solved the system for unknown charges with method of moments, using Galerkin approach. For different values of generalized dielectric temperature kT and initial electrical energy C 0 U 2 /2 the results of the model were interpreted as various kinds of discharges, like corona, cold discharge, and discharges with branched leaders. The results suggest the existence of a single parameter that determines the type of breakdown in the particular class of discharges.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114514619","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}
{"title":"Numerical estimation of source current intensity causing ULF emissions associated with earthquakes by using WLP-FDTD method","authors":"Ryota Kimura, Y. Ando, K. Hattori, M. Hayakawa","doi":"10.1541/jae.41.52","DOIUrl":"https://doi.org/10.1541/jae.41.52","url":null,"abstract":"","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125068560","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}
. In 2014-2015, we conducted MT survey to understand the subsurface electrical structure at Boso peninsula. The obtained data is found to be contaminated by artificial noise (e.g. leak current from DC driven trains, factory noise, etc.). The artificial noise leads to the false structure. To reduce the noise effects, we applied Multi-channel Singular Spectrum Analysis (MSSA). If the window length set 800, we could reduce uncorrelated signal in a certain frequency band. Further investigation on MSSA parameters or additional information on source waves for MT exploration is necessary to eliminate the noise over all frequency bands.
{"title":"Development of noise reduction method for MT data processing using Multi-channel singular spectrum analysis at Boso Peninsula in Japan","authors":"Kaneko Shu, Mogi Toru, Yoshino Chie, Hattori Katsumi","doi":"10.1541/jae.39.37","DOIUrl":"https://doi.org/10.1541/jae.39.37","url":null,"abstract":". In 2014-2015, we conducted MT survey to understand the subsurface electrical structure at Boso peninsula. The obtained data is found to be contaminated by artificial noise (e.g. leak current from DC driven trains, factory noise, etc.). The artificial noise leads to the false structure. To reduce the noise effects, we applied Multi-channel Singular Spectrum Analysis (MSSA). If the window length set 800, we could reduce uncorrelated signal in a certain frequency band. Further investigation on MSSA parameters or additional information on source waves for MT exploration is necessary to eliminate the noise over all frequency bands.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116450880","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}
. We have been studying an earthquake precursor of environmental electromag netic waves (EM) at ELF band of 30-300Hz for the last twenty years. In this paper, a new approach to extract precursor radiation out of noisy ELF environmental signal by making use of Linear Predicting Coefficient, LPC signal model is introduced. For the case of Off- West Fukuoka earthquake with M7.0, an anomalous magnetic flux radiation of about lOpT /VHZ with lpT / VHZ background noise was detected about four days before the event at Tijiwa town Nagasaki Prefecture, 120km south of the epicenter, and five aftershocks exceeding M5.0 also followed respectively the anomalous radiations within one day's delay. The radiation area was determined near the epicenter for both the main and aftershocks, by direction finding of the detected anomaly signal from two sites of Tijiwa and Tomochi through the signal amplitude ratio of EW to NS of sensing loop coils. These two facts may confirm the existence of EM precursor.
{"title":"EM Precursor Phenomena of Off-West-Fukuoka M7 .0 Earthquake","authors":"T. Fujii, I. Takumi, M. Hata, H. Yasukawa","doi":"10.1541/JAE.27.69","DOIUrl":"https://doi.org/10.1541/JAE.27.69","url":null,"abstract":". We have been studying an earthquake precursor of environmental electromag netic waves (EM) at ELF band of 30-300Hz for the last twenty years. In this paper, a new approach to extract precursor radiation out of noisy ELF environmental signal by making use of Linear Predicting Coefficient, LPC signal model is introduced. For the case of Off- West Fukuoka earthquake with M7.0, an anomalous magnetic flux radiation of about lOpT /VHZ with lpT / VHZ background noise was detected about four days before the event at Tijiwa town Nagasaki Prefecture, 120km south of the epicenter, and five aftershocks exceeding M5.0 also followed respectively the anomalous radiations within one day's delay. The radiation area was determined near the epicenter for both the main and aftershocks, by direction finding of the detected anomaly signal from two sites of Tijiwa and Tomochi through the signal amplitude ratio of EW to NS of sensing loop coils. These two facts may confirm the existence of EM precursor.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122652502","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}
. Intensive and transient energetic radiations associated with winter thunderstorm activities were detected around the west coast of Sea of Japan. We identified the source location of the transient energetic radiation, lasting for several minutes, through the observations of radiation, atmospheric electric field, and meteorological radar echoes. Our identification indicated that the transient energetic radiation was emitted from a downward hemispherical surface with regardless of lightning discharge, the bottom of which was about 300 m above sea level. This may occurs due to the generation of bremsstrahlung photons caused by electric fields inside the thunderstorm, because the energy of the observed radiation exceeds that of the radiation emitted from natural nuclides. In order to verify this speculation, we calculate the behavior of secondary cosmic ray electrons and photons in intensive electric fields by Monte Carlo technique. The photon flux largely increases just under the thundercloud if we assume that the electric field around the downward hemispherical surface is - 400 kV/m, and the photon energy spectrum shows a large increase in the energy region of several MeV. When the calculated energy spectrum emitted from the thunderstorm is consistent with the observed results, the large electric field around - 400 kV/m is required around the bottom of the thundercloud.
{"title":"Monte Carlo Simulation for the Source of Transient Energetic Radiation Generated by Thunderstorm Activity","authors":"T. Torii, T. Sugita, M. Kamogawa","doi":"10.1541/JAE.34.1","DOIUrl":"https://doi.org/10.1541/JAE.34.1","url":null,"abstract":". Intensive and transient energetic radiations associated with winter thunderstorm activities were detected around the west coast of Sea of Japan. We identified the source location of the transient energetic radiation, lasting for several minutes, through the observations of radiation, atmospheric electric field, and meteorological radar echoes. Our identification indicated that the transient energetic radiation was emitted from a downward hemispherical surface with regardless of lightning discharge, the bottom of which was about 300 m above sea level. This may occurs due to the generation of bremsstrahlung photons caused by electric fields inside the thunderstorm, because the energy of the observed radiation exceeds that of the radiation emitted from natural nuclides. In order to verify this speculation, we calculate the behavior of secondary cosmic ray electrons and photons in intensive electric fields by Monte Carlo technique. The photon flux largely increases just under the thundercloud if we assume that the electric field around the downward hemispherical surface is - 400 kV/m, and the photon energy spectrum shows a large increase in the energy region of several MeV. When the calculated energy spectrum emitted from the thunderstorm is consistent with the observed results, the large electric field around - 400 kV/m is required around the bottom of the thundercloud.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121923029","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}
. The Schumann resonances (SRs) are the ELF electromagnetic phenomena, which are triggered by global lightning activity. The spectral characteristics of the SR modes are characterized by three fundamental factors: (1) resonant mode intensity, (2) central frequency, and (3) Q-factor (damping effect). These parameters are ~stimated by Lorenzian approximation to the SR data observed at Moshiri, Japan. The SR data- used here are equivalently one-year long, and we have paid particular attention to two horizontal magnetic-field components (H 05, Hew). Variations of the different modes (1st (-8 Hz), 2nd (-14 Hz) and 3rd (-20 Hz)) and different field components are presented to study the diurnal and seasonal variations. The intensity variations of the various modes and components show three dominant maxima in the diurnal variation related to lightning activity in south-east Asia (UT -08 h) and America (UT -20 h) with minor effect from Africa (UT -14 h). The largest global lightning activity occurs during the northern hemisphere summer (JJA) with the southern hemisphere summer (DJF) having the least lightning activity. The frequency and Q-factor variations of the different modes and field components at Moshiri are very complicated in structure, but agree remarkably well with those by recent studies mainly based on the Ez and magnetic observations. Similarities and differences are finally discussed between our Moshiri results and the latest ones from Israel.
{"title":"Diurnal and seasonal variations in the Schumann resonance parameters at Moshiri, Japan","authors":"M. Sekiguchi, Y. Hobara, M. Hayakawa","doi":"10.1541/JAE.28.1","DOIUrl":"https://doi.org/10.1541/JAE.28.1","url":null,"abstract":". The Schumann resonances (SRs) are the ELF electromagnetic phenomena, which are triggered by global lightning activity. The spectral characteristics of the SR modes are characterized by three fundamental factors: (1) resonant mode intensity, (2) central frequency, and (3) Q-factor (damping effect). These parameters are ~stimated by Lorenzian approximation to the SR data observed at Moshiri, Japan. The SR data- used here are equivalently one-year long, and we have paid particular attention to two horizontal magnetic-field components (H 05, Hew). Variations of the different modes (1st (-8 Hz), 2nd (-14 Hz) and 3rd (-20 Hz)) and different field components are presented to study the diurnal and seasonal variations. The intensity variations of the various modes and components show three dominant maxima in the diurnal variation related to lightning activity in south-east Asia (UT -08 h) and America (UT -20 h) with minor effect from Africa (UT -14 h). The largest global lightning activity occurs during the northern hemisphere summer (JJA) with the southern hemisphere summer (DJF) having the least lightning activity. The frequency and Q-factor variations of the different modes and field components at Moshiri are very complicated in structure, but agree remarkably well with those by recent studies mainly based on the Ez and magnetic observations. Similarities and differences are finally discussed between our Moshiri results and the latest ones from Israel.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128977050","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}
. We have investigated the relationship between electromagnetic phenomena and earthquakes based on statistical analysis. In order to make a prediction of earthquake, we have to find out any relationship between electromagnetic phenomena and earthquakes. This paper was intended to find out any relation between radiation dose increments and occurrences of earthquakes. At this time, we chose five monitoring points in Kanto area and gave a quantitative rating by means of Molchan’s error diagram for statistical validity. As a result, we could find the strong relationship between radiation dose increments and occurrences of earthquakes in some monitoring points.
{"title":"Statistical relation between earthquakes and radiation dose increments at the radiation monitoring post","authors":"Yuya Ogura, K. Motojima","doi":"10.1541/jae.38.11","DOIUrl":"https://doi.org/10.1541/jae.38.11","url":null,"abstract":". We have investigated the relationship between electromagnetic phenomena and earthquakes based on statistical analysis. In order to make a prediction of earthquake, we have to find out any relationship between electromagnetic phenomena and earthquakes. This paper was intended to find out any relation between radiation dose increments and occurrences of earthquakes. At this time, we chose five monitoring points in Kanto area and gave a quantitative rating by means of Molchan’s error diagram for statistical validity. As a result, we could find the strong relationship between radiation dose increments and occurrences of earthquakes in some monitoring points.","PeriodicalId":274637,"journal":{"name":"Journal of atmospheric electricity","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116367593","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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