Through the revelation of“commodity value”,the“invisible hand”described by Adam Smith is now clearly visible.It is precisely“commodity value”that guides people to seek benefits for themselves and for others,addi...Through the revelation of“commodity value”,the“invisible hand”described by Adam Smith is now clearly visible.It is precisely“commodity value”that guides people to seek benefits for themselves and for others,adding enormous wealth to society.展开更多
The advantages of the geographical conditions,natural,and cultural environment of Zhuhai agri-tourism are introduced,and the related development countermeasure is put forward.
We present seeing measurements of the Guoshoujing Telescope （formerly named the Large Sky Area Multi-Object Fiber Spectroscopic Telescope- LAMOST） site at Xinglong station during the period from 2007 March 12 to Apr...We present seeing measurements of the Guoshoujing Telescope （formerly named the Large Sky Area Multi-Object Fiber Spectroscopic Telescope- LAMOST） site at Xinglong station during the period from 2007 March 12 to April 25. The measurements were carried out with the Differential Image Motion Monitor （DIMM）, and a total of 9259 data sets was obtained. The median seeing was measured to be 1.1″, with 25% being better than 0.8″and 75% better than 1.5″. The experiment shows that the DIMM exposure time has significant effects on the results of seeing measurements. An SBIG Polaris seeing monitor, which had been planned to be installed on the LAMOST site for long-term monitoring, was also employed during the DIMM observations. The results show that the SBIG seeing monitor is easily affected by gusty wind, resulting in larger seeing values. Considering the previous seeing measurements at Xinglong station over the last 15 yr, we conclude that an acceptable seeing condition at Xinglong station is around 1″-2″.展开更多
Site testing results indicate that Antarctic Dome A is an excellent ground-based astronomical site suitable for observations ranging from visible to infrared wavelengths. However, the harsh environment in Antarctica, ...Site testing results indicate that Antarctic Dome A is an excellent ground-based astronomical site suitable for observations ranging from visible to infrared wavelengths. However, the harsh environment in Antarctica, especially the very low temperature and atmospheric pressure, always produces frost on the telescopes＇ mirrors, which are exposed to the air. Since the Dome A site is still unattended, the Antarctic telescope tubes are always designed to be filled with dry nitrogen, and the outer surfaces of the optical system are heated by an indium-tin oxide thin film. These precautions can prevent the optical surfaces from frosting over, but they degrade the image quality by introducing additional mirror seeing. Based on testing observations of the second Antarctic Survey Telescope （AST3-2） in the Mohe site in China, mirror seeing resulting from the heated aspheric plate has been measured using micro-thermal sensors. Results comparing the real-time atmospheric seeing monitored by the Differential Image Motion Monitor and real-time examinations of image quality agree well.展开更多
In this article,we present a detailed analysis of the statistical properties of seeing for the Muztaghata site which is a candidate site for hosting the future Chinese Large Optical/infrared Telescope(LOT)project.The ...In this article,we present a detailed analysis of the statistical properties of seeing for the Muztaghata site which is a candidate site for hosting the future Chinese Large Optical/infrared Telescope(LOT)project.The measurements were obtained with differential image motion monitors(DIMMs)from April2017 to November 2018 at different heights during different periods.The median seeings at 11 m and6 m are very close but significantly different from that on the ground.We mainly analyzed the seeing at11 m monthly and hourly,having found that the best season for observing was from late autumn to early winter and seeing tended to improve during the night only in autumn.The analysis of the dependence on temperature inversion,wind speed and direction also was made and the best meteorological conditions for seeing are given.展开更多
The Seeing observation at Gaomeigu station, Lijiang, Yunnan during March, 1995—December, 1996 is introduced in this paper, On the average Fried parameter is equal to 15 34cm (FWHM=0 72″). In the same time, the seein...The Seeing observation at Gaomeigu station, Lijiang, Yunnan during March, 1995—December, 1996 is introduced in this paper, On the average Fried parameter is equal to 15 34cm (FWHM=0 72″). In the same time, the seeing observation in the 46 nights that the observation time was more than five hours is introduced. On the average Fried parameter is r 0=16 5cm (FWHM=0 67″). For the best seeing on an average r 0=22 36cm (FWHM=0 49″). The mininum on an average is r 0=12 95cm (FWHM=0 85″).展开更多
China is the manufacturing hub of the world, and its huge market demands have contributed to the large inflow of foreign capital. As the Chinese economy has entered the ＂new normal＂, the market has seen both an infl...China is the manufacturing hub of the world, and its huge market demands have contributed to the large inflow of foreign capital. As the Chinese economy has entered the ＂new normal＂, the market has seen both an inflow and exodus of foreign capital. Is the exodus of foreign capital from China really under way？展开更多
Logicians have worked with so many different logical systems that it is not possible even to esti-mate the number. Of these, many are best seen as extensions of classical logic, including both thoseof interest to math...Logicians have worked with so many different logical systems that it is not possible even to esti-mate the number. Of these, many are best seen as extensions of classical logic, including both thoseof interest to mathematics and those of interest to philosophy and computer science. (Henceforth Iwill use the term "intelligent systems theory" for the common ground of philosophical logic and展开更多
The intensification of a low-level jet off the Somali coast, as observed through GOES (I-O) satellite during Indian summer monsoon 1979 has been studied. Excitation of Low-level cross-equatorial flow in the western In...The intensification of a low-level jet off the Somali coast, as observed through GOES (I-O) satellite during Indian summer monsoon 1979 has been studied. Excitation of Low-level cross-equatorial flow in the western Indian ocean results from an interaction between extratropical perturbations moving eastward across the South African-Malgassy region of the Southern Hemisphere. This excitation occurs 2-3 days after the first appearance of a northward propagation cold front across the South African-Malgassy region. Inten-sification of cross-equatorial flow is followed by an increase in rainfall activity along the west coast of India after 3-4 days. The study reveals that this association can be used to forecast an increase in rainfall activity along the west coast of India 5-7 days in advance.展开更多
“Kan”and“Jian”are both sense verbs in Chinese,but they can develop into multiple meanings and usage.In order to prove that the language in communication assumes the collective cultural experience and historical ba...“Kan”and“Jian”are both sense verbs in Chinese,but they can develop into multiple meanings and usage.In order to prove that the language in communication assumes the collective cultural experience and historical background,this article attempts,from the connection and differentiation between various meanings,to sort out how the semantic structure is defined in accordance with the situations where the words are used.In addition,based on the methods of the diachronic research and synchronic research,this article also observes the semantic evolution and the extensive concepts of imitation and implication.展开更多
The global financial crisis will not delay, and could even accelerate, the pace of financial reform in China, one of the country’s leading financial officials said.
LIU GUIJIN is a Chinese face familiar to many African TV viewers. The 67-year-old has been involved with the continent for more than 30 years as a Chinese diplomat. He＇s the first Special Representative of the Chines...LIU GUIJIN is a Chinese face familiar to many African TV viewers. The 67-year-old has been involved with the continent for more than 30 years as a Chinese diplomat. He＇s the first Special Representative of the Chinese Government for African Affairs.展开更多
文摘Through the revelation of“commodity value”,the“invisible hand”described by Adam Smith is now clearly visible.It is precisely“commodity value”that guides people to seek benefits for themselves and for others,adding enormous wealth to society.
文摘The advantages of the geographical conditions,natural,and cultural environment of Zhuhai agri-tourism are introduced,and the related development countermeasure is put forward.
基金supported by the National Natural Science Foundation of China(Grant Nos.10903014 and10778709)supported by the Young Researcher Grant of National Astronomical Observatories,Chinese Academy of Sciences
文摘We present seeing measurements of the Guoshoujing Telescope （formerly named the Large Sky Area Multi-Object Fiber Spectroscopic Telescope- LAMOST） site at Xinglong station during the period from 2007 March 12 to April 25. The measurements were carried out with the Differential Image Motion Monitor （DIMM）, and a total of 9259 data sets was obtained. The median seeing was measured to be 1.1″, with 25% being better than 0.8″and 75% better than 1.5″. The experiment shows that the DIMM exposure time has significant effects on the results of seeing measurements. An SBIG Polaris seeing monitor, which had been planned to be installed on the LAMOST site for long-term monitoring, was also employed during the DIMM observations. The results show that the SBIG seeing monitor is easily affected by gusty wind, resulting in larger seeing values. Considering the previous seeing measurements at Xinglong station over the last 15 yr, we conclude that an acceptable seeing condition at Xinglong station is around 1″-2″.
基金supported by the China Polar Science Strategy Research Fund project (Grant no. 20120314)the National Natural Science Foundation of China (Grant no. 11190013)
文摘Site testing results indicate that Antarctic Dome A is an excellent ground-based astronomical site suitable for observations ranging from visible to infrared wavelengths. However, the harsh environment in Antarctica, especially the very low temperature and atmospheric pressure, always produces frost on the telescopes＇ mirrors, which are exposed to the air. Since the Dome A site is still unattended, the Antarctic telescope tubes are always designed to be filled with dry nitrogen, and the outer surfaces of the optical system are heated by an indium-tin oxide thin film. These precautions can prevent the optical surfaces from frosting over, but they degrade the image quality by introducing additional mirror seeing. Based on testing observations of the second Antarctic Survey Telescope （AST3-2） in the Mohe site in China, mirror seeing resulting from the heated aspheric plate has been measured using micro-thermal sensors. Results comparing the real-time atmospheric seeing monitored by the Differential Image Motion Monitor and real-time examinations of image quality agree well.
基金supported by theNational Nature Science Foundation of China(Grant Nos.11873081 and 11603065)the Operation,Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments,budgeted from the Ministry of Finance of China(MOF)and administered by the Chinese Academy of Sciences。
文摘In this article,we present a detailed analysis of the statistical properties of seeing for the Muztaghata site which is a candidate site for hosting the future Chinese Large Optical/infrared Telescope(LOT)project.The measurements were obtained with differential image motion monitors(DIMMs)from April2017 to November 2018 at different heights during different periods.The median seeings at 11 m and6 m are very close but significantly different from that on the ground.We mainly analyzed the seeing at11 m monthly and hourly,having found that the best season for observing was from late autumn to early winter and seeing tended to improve during the night only in autumn.The analysis of the dependence on temperature inversion,wind speed and direction also was made and the best meteorological conditions for seeing are given.
文摘The Seeing observation at Gaomeigu station, Lijiang, Yunnan during March, 1995—December, 1996 is introduced in this paper, On the average Fried parameter is equal to 15 34cm (FWHM=0 72″). In the same time, the seeing observation in the 46 nights that the observation time was more than five hours is introduced. On the average Fried parameter is r 0=16 5cm (FWHM=0 67″). For the best seeing on an average r 0=22 36cm (FWHM=0 49″). The mininum on an average is r 0=12 95cm (FWHM=0 85″).
文摘China is the manufacturing hub of the world, and its huge market demands have contributed to the large inflow of foreign capital. As the Chinese economy has entered the ＂new normal＂, the market has seen both an inflow and exodus of foreign capital. Is the exodus of foreign capital from China really under way？
文摘Logicians have worked with so many different logical systems that it is not possible even to esti-mate the number. Of these, many are best seen as extensions of classical logic, including both thoseof interest to mathematics and those of interest to philosophy and computer science. (Henceforth Iwill use the term "intelligent systems theory" for the common ground of philosophical logic and
文摘The intensification of a low-level jet off the Somali coast, as observed through GOES (I-O) satellite during Indian summer monsoon 1979 has been studied. Excitation of Low-level cross-equatorial flow in the western Indian ocean results from an interaction between extratropical perturbations moving eastward across the South African-Malgassy region of the Southern Hemisphere. This excitation occurs 2-3 days after the first appearance of a northward propagation cold front across the South African-Malgassy region. Inten-sification of cross-equatorial flow is followed by an increase in rainfall activity along the west coast of India after 3-4 days. The study reveals that this association can be used to forecast an increase in rainfall activity along the west coast of India 5-7 days in advance.
文摘“Kan”and“Jian”are both sense verbs in Chinese,but they can develop into multiple meanings and usage.In order to prove that the language in communication assumes the collective cultural experience and historical background,this article attempts,from the connection and differentiation between various meanings,to sort out how the semantic structure is defined in accordance with the situations where the words are used.In addition,based on the methods of the diachronic research and synchronic research,this article also observes the semantic evolution and the extensive concepts of imitation and implication.
文摘The global financial crisis will not delay, and could even accelerate, the pace of financial reform in China, one of the country’s leading financial officials said.
文摘LIU GUIJIN is a Chinese face familiar to many African TV viewers. The 67-year-old has been involved with the continent for more than 30 years as a Chinese diplomat. He＇s the first Special Representative of the Chinese Government for African Affairs.
