A long-range sound propagation experiment was conducted in the West Pacific Ocean in July 2013. Linear frequency-modulated signals with a frequency band of 260-360Hz were transmitted by a transducer hung on a floating...A long-range sound propagation experiment was conducted in the West Pacific Ocean in July 2013. Linear frequency-modulated signals with a frequency band of 260-360Hz were transmitted by a transducer hung on a floating ship during the experiment and were received by a horizontal line array towed by another ship sailing away from the transducer. The maximum distance between the two ships was 1029km. Signals were received at the distances 34-220 kin, 612-635 km and 926-1029 kin. Transmission loss versus distance between source and receiver was obtained and compared with the theoretical results predicted by the parabolic equation method program RAM. It is shown that RAM is adequate for estimating the transmission loss for distances up to 1029km. When the water depth is larger than the surface conjugate depth, the ocean bottom rarely influences the transmission loss in the convergence zones. However, in the opposite situation, the ocean bottom contributes significantly to the transmission loss.展开更多
Objective The Early Permian mafic-ultramafic intrusions （298- 270 Ma, Mao et al., 2008）, which are widely distributed in different tectonic domains in North Xinjiang, host magmatic sulfide ore deposits, making Nort...Objective The Early Permian mafic-ultramafic intrusions （298- 270 Ma, Mao et al., 2008）, which are widely distributed in different tectonic domains in North Xinjiang, host magmatic sulfide ore deposits, making North Xinjiang the second most important region for Ni resources in China. The bulk of Cu-Ni ore deposits in East Tianshan, making up a large portion of Ni resources in North Xinjiang, were concentrated in the east of East Tianshan （the Huangshan- Jing＇erquan region） （Feng Yanqing, et al., 2017）, while no any analogue was discovered in the west of East Tianshan until the Lubei Cu-Ni （Co） ore deposit （90°21＇E, 42°10rN） was identified by Xinjiang Geological Survey in 2014. The Lubei Cu-Ni （Co） ore deposit is a medium- to large- sized deposit with Ni and Cu grades in the range 0.2%- 7.76% and 0.2%-2.30%, respectively. This work has initiated the prospection for a large-sized Cu-Ni ore deposit in the west of East Tianshan.展开更多
1 Introduction The Sanjiang metallogenic belt is one of the important nonferrous metal metallogenic belts in China,the potential resources of copper,lead,zinc,silver,gold and tin are huge(Zhengqian et al.,1993).In the...1 Introduction The Sanjiang metallogenic belt is one of the important nonferrous metal metallogenic belts in China,the potential resources of copper,lead,zinc,silver,gold and tin are huge(Zhengqian et al.,1993).In the west of Yunnan province has a lot of Yanshanian granite,according to 1:20 million test data,development of granite belt rich in radioactive minerals in the west of Yunnan展开更多
Qarhan Salt Lake is located in the eastern part of the Qaidam Basin,which is first discovered the large potash deposit in the late 1950s.The Bieletan section is located in the west of Qarhan Salt Lake,where saline sed...Qarhan Salt Lake is located in the eastern part of the Qaidam Basin,which is first discovered the large potash deposit in the late 1950s.The Bieletan section is located in the west of Qarhan Salt Lake,where saline sediment展开更多
This is my second visit to Los Angeles as the Director of the State Administration for Religious Affairs to exchange views with all the American Christian friends present. I believe what you want to learn best is the ...This is my second visit to Los Angeles as the Director of the State Administration for Religious Affairs to exchange views with all the American Christian friends present. I believe what you want to learn best is the real situation of Chinese Christianity at present. I can tell you with pleasure that Chinese Christians are running their church independently and has thus removed the "cap" of "foreigness". It has become a religion that eulogizes love and traditional culture. As a reli-展开更多
At the beginning of the Cenozoic,the atmospheric CO_(2)concentration increased rapidly from~2000 ppmv at 60 Ma to~4600 ppmv at 51 Ma,which is 5–10 times higher than the present value,and then continuous declined from...At the beginning of the Cenozoic,the atmospheric CO_(2)concentration increased rapidly from~2000 ppmv at 60 Ma to~4600 ppmv at 51 Ma,which is 5–10 times higher than the present value,and then continuous declined from~51 to 34 Ma.The cause of this phenomenon is still not well understood.In this study,we demonstrate that the initiation of Cenozoic west Pacific plate subduction,triggered by the hard collision in the Tibetan Plateau,occurred at approximately 51 Ma,coinciding with the tipping point.The water depths of the Pacific subduction zones are mostly below the carbonate compensation depths,while those of the Neo-Tethys were much shallower before the collision and caused far more carbonate subducting.Additionally,more volcanic ashes erupted from the west Pacific subduction zones,which consume CO_(2).The average annual west Pacific volvano eruption is 1.11 km~3,which is higher than previous estimations.The amount of annual CO_(2)absorbed by chemical weathering of additional west Pacific volcanic ashes could be comparable to the silicate weathering by the global river.We propose that the initiation of the western Pacific subduction controlled the long-term reduction of atmospheric CO_(2)concentration.展开更多
“Chinese Studies in the West:The Chinese Record”is a book series consisting of works written by Westerners who went to China from the 18th to the early 20th century,each of which contains a Chinese introduction and ...“Chinese Studies in the West:The Chinese Record”is a book series consisting of works written by Westerners who went to China from the 18th to the early 20th century,each of which contains a Chinese introduction and translations of the book's core information followed by the reprint of the original text for scholars to study and research.From 2009 to 2021,13 volumes have been published,with a total of 130 titles.This article will discuss the different types of Westerners in the Series,the activities they engaged in while they were in China or related to China,the books they wrote and their opinions towards China and its people.It will also explore the Series'social impact and its value to the study of Sino-Western culture exchanges.展开更多
The Iberian Peninsula was first inhabited by Celts, Iberians, Carthaginians, Romans, Visigoths, and later Berbers. How is it possible that in a spam of only 50 years, the Berbers were able to go pass the Pyrenees and ...The Iberian Peninsula was first inhabited by Celts, Iberians, Carthaginians, Romans, Visigoths, and later Berbers. How is it possible that in a spam of only 50 years, the Berbers were able to go pass the Pyrenees and practically ruled what today is Portugal, Spain, and region of France？ This article attempts to uncover the sociological aspects that helped the Berbers and Arabs rule the Iberian Peninsula quite rapidly. It was due to the commonalities and not the differences that Spain＇s political leaders went from Arian Visigoths to Muslims for the next 800 years. Ignacio Olague＇s book La Revoluci6n Isldmica en Occidente （The Islamic Revolution in the West）, also translated as Les Arabes N＇ont Jamais Envahi l＇Espagne （The Arabs Never Invaded Spain）, serves as one instrument to shed light to how this historical event took place. The result of this fusion of cultures not only created a rich civilization that would planted the seeds of the Renaissance three centuries before it began in Italy, but also contributed to the formation of a new language （between 720-750 AD）： El castellano o espahol （Spanish language）, which today is the official language in 21 st countries.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 11174312 and 11434012the Public Science and Technology Research Project of Ocean under Grant No 201405032
文摘A long-range sound propagation experiment was conducted in the West Pacific Ocean in July 2013. Linear frequency-modulated signals with a frequency band of 260-360Hz were transmitted by a transducer hung on a floating ship during the experiment and were received by a horizontal line array towed by another ship sailing away from the transducer. The maximum distance between the two ships was 1029km. Signals were received at the distances 34-220 kin, 612-635 km and 926-1029 kin. Transmission loss versus distance between source and receiver was obtained and compared with the theoretical results predicted by the parabolic equation method program RAM. It is shown that RAM is adequate for estimating the transmission loss for distances up to 1029km. When the water depth is larger than the surface conjugate depth, the ocean bottom rarely influences the transmission loss in the convergence zones. However, in the opposite situation, the ocean bottom contributes significantly to the transmission loss.
基金supported by the Geological Survey of China(grant No.DD20160007)
文摘Objective The Early Permian mafic-ultramafic intrusions （298- 270 Ma, Mao et al., 2008）, which are widely distributed in different tectonic domains in North Xinjiang, host magmatic sulfide ore deposits, making North Xinjiang the second most important region for Ni resources in China. The bulk of Cu-Ni ore deposits in East Tianshan, making up a large portion of Ni resources in North Xinjiang, were concentrated in the east of East Tianshan （the Huangshan- Jing＇erquan region） （Feng Yanqing, et al., 2017）, while no any analogue was discovered in the west of East Tianshan until the Lubei Cu-Ni （Co） ore deposit （90°21＇E, 42°10rN） was identified by Xinjiang Geological Survey in 2014. The Lubei Cu-Ni （Co） ore deposit is a medium- to large- sized deposit with Ni and Cu grades in the range 0.2%- 7.76% and 0.2%-2.30%, respectively. This work has initiated the prospection for a large-sized Cu-Ni ore deposit in the west of East Tianshan.
基金supported by the China Nuclear Industry Geological Bureau Foundation (No.201637 and 201638)
文摘1 Introduction The Sanjiang metallogenic belt is one of the important nonferrous metal metallogenic belts in China,the potential resources of copper,lead,zinc,silver,gold and tin are huge(Zhengqian et al.,1993).In the west of Yunnan province has a lot of Yanshanian granite,according to 1:20 million test data,development of granite belt rich in radioactive minerals in the west of Yunnan
文摘Qarhan Salt Lake is located in the eastern part of the Qaidam Basin,which is first discovered the large potash deposit in the late 1950s.The Bieletan section is located in the west of Qarhan Salt Lake,where saline sediment
文摘This is my second visit to Los Angeles as the Director of the State Administration for Religious Affairs to exchange views with all the American Christian friends present. I believe what you want to learn best is the real situation of Chinese Christianity at present. I can tell you with pleasure that Chinese Christians are running their church independently and has thus removed the "cap" of "foreigness". It has become a religion that eulogizes love and traditional culture. As a reli-
基金supported by NSFC Major Research Plan on‘‘West-Pacific Earth System Multispheric Interactions’’to Prof.Weidong Sun(Grant No.92258303)AND Prof.Tianyu Chen(Grant No.91858105)。
文摘At the beginning of the Cenozoic,the atmospheric CO_(2)concentration increased rapidly from~2000 ppmv at 60 Ma to~4600 ppmv at 51 Ma,which is 5–10 times higher than the present value,and then continuous declined from~51 to 34 Ma.The cause of this phenomenon is still not well understood.In this study,we demonstrate that the initiation of Cenozoic west Pacific plate subduction,triggered by the hard collision in the Tibetan Plateau,occurred at approximately 51 Ma,coinciding with the tipping point.The water depths of the Pacific subduction zones are mostly below the carbonate compensation depths,while those of the Neo-Tethys were much shallower before the collision and caused far more carbonate subducting.Additionally,more volcanic ashes erupted from the west Pacific subduction zones,which consume CO_(2).The average annual west Pacific volvano eruption is 1.11 km~3,which is higher than previous estimations.The amount of annual CO_(2)absorbed by chemical weathering of additional west Pacific volcanic ashes could be comparable to the silicate weathering by the global river.We propose that the initiation of the western Pacific subduction controlled the long-term reduction of atmospheric CO_(2)concentration.
文摘“Chinese Studies in the West:The Chinese Record”is a book series consisting of works written by Westerners who went to China from the 18th to the early 20th century,each of which contains a Chinese introduction and translations of the book's core information followed by the reprint of the original text for scholars to study and research.From 2009 to 2021,13 volumes have been published,with a total of 130 titles.This article will discuss the different types of Westerners in the Series,the activities they engaged in while they were in China or related to China,the books they wrote and their opinions towards China and its people.It will also explore the Series'social impact and its value to the study of Sino-Western culture exchanges.
文摘The Iberian Peninsula was first inhabited by Celts, Iberians, Carthaginians, Romans, Visigoths, and later Berbers. How is it possible that in a spam of only 50 years, the Berbers were able to go pass the Pyrenees and practically ruled what today is Portugal, Spain, and region of France？ This article attempts to uncover the sociological aspects that helped the Berbers and Arabs rule the Iberian Peninsula quite rapidly. It was due to the commonalities and not the differences that Spain＇s political leaders went from Arian Visigoths to Muslims for the next 800 years. Ignacio Olague＇s book La Revoluci6n Isldmica en Occidente （The Islamic Revolution in the West）, also translated as Les Arabes N＇ont Jamais Envahi l＇Espagne （The Arabs Never Invaded Spain）, serves as one instrument to shed light to how this historical event took place. The result of this fusion of cultures not only created a rich civilization that would planted the seeds of the Renaissance three centuries before it began in Italy, but also contributed to the formation of a new language （between 720-750 AD）： El castellano o espahol （Spanish language）, which today is the official language in 21 st countries.
