This article aims to study the history of scientific investigations in China in the nineteenth century,made by Russian scientists who ranged in status and position including official agents,the directors of the Russia...This article aims to study the history of scientific investigations in China in the nineteenth century,made by Russian scientists who ranged in status and position including official agents,the directors of the Russian Magneto-Meteorological Observatory in Beijing,the members of the Russian Orthodox Mission(ROM),and others.The article gives a detailed analysis of the unique expeditions of H.Fritsche(1839–1913),director of the Russian Magneto-Meteorological Observatory in Beijing,and Archimandrite Palladius(1817–1878),head of the ROM to the northeast part of China.During those expeditions,existing maps were corrected and new maps were made.The article also covers the history of natural science investigations,made by other members of missions,doctors,and attached persons.This article employs sources from Russian archives(Saint Petersburg Branch of the Archive of the Russian Academy of Sciences,Russian State Historical Archive,Archive of the Foreign Policy of the Russian Empire),which were rarely used by the scientific community,and adopts an empirical approach based on objectivity and historicism to the sources and research.展开更多
In this paper,the main purpose is to analyze and research the characteristics of the geoelectric field observed data with a long time span and large amplitude abnormal change,at the Lhasa geomagnetic station( hereafte...In this paper,the main purpose is to analyze and research the characteristics of the geoelectric field observed data with a long time span and large amplitude abnormal change,at the Lhasa geomagnetic station( hereafter referred to as "Lhasa station "),before and after the Nepal M_S8. 1 strong earthquake,which occurred on April 25,2015. Based on the observation conditions,the observation system,and the observed data of Lhasa station preliminary discussed,the main characteristics of the abnormal change and evolution process are analyzed and studied,using the following two methods; the "synthesis energy accumulation"and the "power as MSA spectrum"analysis,from the two aspects of the"Time Domain"and"Frequency Domain. "The results show that the abnormal change of the geo-electric field observation of Lhasa station experienced a development stage following the process of "trend change- disturbance change- earthquake period-recovery period",and an evolution process of "low frequency change- high frequency change- smooth change- high frequency change ",before and after the Nepal M_S8. 1strong earthquake. Comprehensive analysis shows that the variation characteristics and evolution process of the geo-electric field at Lhasa station are basically consistent with the results of the relevant mechanism and phenomenon research. So far,this is valuable information with certain objectivity,which is typical and representative to reflect the whole process of the gestation, occurrence and complete development of such strongearthquakes.展开更多
文摘This article aims to study the history of scientific investigations in China in the nineteenth century,made by Russian scientists who ranged in status and position including official agents,the directors of the Russian Magneto-Meteorological Observatory in Beijing,the members of the Russian Orthodox Mission(ROM),and others.The article gives a detailed analysis of the unique expeditions of H.Fritsche(1839–1913),director of the Russian Magneto-Meteorological Observatory in Beijing,and Archimandrite Palladius(1817–1878),head of the ROM to the northeast part of China.During those expeditions,existing maps were corrected and new maps were made.The article also covers the history of natural science investigations,made by other members of missions,doctors,and attached persons.This article employs sources from Russian archives(Saint Petersburg Branch of the Archive of the Russian Academy of Sciences,Russian State Historical Archive,Archive of the Foreign Policy of the Russian Empire),which were rarely used by the scientific community,and adopts an empirical approach based on objectivity and historicism to the sources and research.
基金funded by the key projects off undamental Research projects in the Institute of Earthquake Science,CEA(Grant No:2013IES0101&2014IES0101)
文摘In this paper,the main purpose is to analyze and research the characteristics of the geoelectric field observed data with a long time span and large amplitude abnormal change,at the Lhasa geomagnetic station( hereafter referred to as "Lhasa station "),before and after the Nepal M_S8. 1 strong earthquake,which occurred on April 25,2015. Based on the observation conditions,the observation system,and the observed data of Lhasa station preliminary discussed,the main characteristics of the abnormal change and evolution process are analyzed and studied,using the following two methods; the "synthesis energy accumulation"and the "power as MSA spectrum"analysis,from the two aspects of the"Time Domain"and"Frequency Domain. "The results show that the abnormal change of the geo-electric field observation of Lhasa station experienced a development stage following the process of "trend change- disturbance change- earthquake period-recovery period",and an evolution process of "low frequency change- high frequency change- smooth change- high frequency change ",before and after the Nepal M_S8. 1strong earthquake. Comprehensive analysis shows that the variation characteristics and evolution process of the geo-electric field at Lhasa station are basically consistent with the results of the relevant mechanism and phenomenon research. So far,this is valuable information with certain objectivity,which is typical and representative to reflect the whole process of the gestation, occurrence and complete development of such strongearthquakes.
