Editorial note--The International Commission on the History of Geological Sciences has undertaken to organize a series of short articles for Episodes on the history of the different Sessions of the International Geolo...Editorial note--The International Commission on the History of Geological Sciences has undertaken to organize a series of short articles for Episodes on the history of the different Sessions of the International Geological Congress. These were held as follows:France (1878), Italy (1881), Germany (1885), UK (1888), USA(1891), Switzerland (1894), Russia (1897), France (1900), Austria(1903), Mexico (1906), Sweden (1910), Canada (1913), Belgium(1922), Spain (1926), South Africa (1929), USA (1933), USSR(1937), UK (1948), Algeria (1952), Mexico (1956), Denmark/Finland/Norway/Sweden/Iceland (1960), India (1964), Czechoslovakia(1968), Canada (1972), Australia (1976), France (1980), USSR(1984), USA (1989), Japan (1992), China (1996), Brazil (2000). Any authors wishing to offer contributions on the meetings in Mexico(1906), Canada (1913), Belgium, Denmark, India, Canada (1972),and Brazil are invited to contact the INHIGEO Secretary-General at: doldroyd@optushome.com.au. The papers will not appear inchronological order.展开更多
We summarize studies of helical properties of solar magnetic fields such as current helicity and twist of magnetic fields in solar active regions (ARs), that are observational tracers of the alpha-effect in the solar ...We summarize studies of helical properties of solar magnetic fields such as current helicity and twist of magnetic fields in solar active regions (ARs), that are observational tracers of the alpha-effect in the solar convective zone (SCZ). Information on their spatial distribution is obtained by analysis of systematic magnetographic observations of active regions taken at Huairou Solar Observing Station of National Astronomical Observatories of Chinese Academy of Sciences. The main property is that the tracers of the alpha-effect are antisymmetric about the solar equator. Identifying longitudinal migration of active regions with their individual rotation rates and taking into account the internal differential rotation law within the SCZ known from helioseismology, we deduce the distribution of the effect over depth. We have found evidence that the alpha-effect changes its value and sign near the bottom of the SCZ, and this is in accord with the theoretical studies and numerical simulations. We discuss other regularities which can be revealed by further analysis such as possible dependence on longitude, time, and magnetic field strength, etc.展开更多
We present a study of the relationship between integral area and corresponding total magnetic flux for solar active regions. It is shown that some of these relationships are satisfied to simple power laws. Fractal exa...We present a study of the relationship between integral area and corresponding total magnetic flux for solar active regions. It is shown that some of these relationships are satisfied to simple power laws. Fractal examination showed that some of these power laws can not be justified inside the simple models of stationary magnetic flux tube aggregation. All magnetic fluxes and corresponding areas were calculated using the data measured with the Solar Magnetic Field Telescope of the Huairou Solar Observing Station in Beijing.展开更多
Artifical neural networks (ANN) are now widely used successfully as tools for hith energy physics.The paper covers two aspects.First,mapping ANNs onto the proposed ring and linear systolic array provides an efficient ...Artifical neural networks (ANN) are now widely used successfully as tools for hith energy physics.The paper covers two aspects.First,mapping ANNs onto the proposed ring and linear systolic array provides an efficient implementation of VLSI-based architectures since in this case all connections among processing elements are local and regular,Second.it is discussed algorthmic organizing of such structures on the base of modular algebra whose use can provide an essential increase of system throughput.展开更多
文摘Editorial note--The International Commission on the History of Geological Sciences has undertaken to organize a series of short articles for Episodes on the history of the different Sessions of the International Geological Congress. These were held as follows:France (1878), Italy (1881), Germany (1885), UK (1888), USA(1891), Switzerland (1894), Russia (1897), France (1900), Austria(1903), Mexico (1906), Sweden (1910), Canada (1913), Belgium(1922), Spain (1926), South Africa (1929), USA (1933), USSR(1937), UK (1948), Algeria (1952), Mexico (1956), Denmark/Finland/Norway/Sweden/Iceland (1960), India (1964), Czechoslovakia(1968), Canada (1972), Australia (1976), France (1980), USSR(1984), USA (1989), Japan (1992), China (1996), Brazil (2000). Any authors wishing to offer contributions on the meetings in Mexico(1906), Canada (1913), Belgium, Denmark, India, Canada (1972),and Brazil are invited to contact the INHIGEO Secretary-General at: doldroyd@optushome.com.au. The papers will not appear inchronological order.
基金Supported by the National Natural Science Foundation of China.
文摘We summarize studies of helical properties of solar magnetic fields such as current helicity and twist of magnetic fields in solar active regions (ARs), that are observational tracers of the alpha-effect in the solar convective zone (SCZ). Information on their spatial distribution is obtained by analysis of systematic magnetographic observations of active regions taken at Huairou Solar Observing Station of National Astronomical Observatories of Chinese Academy of Sciences. The main property is that the tracers of the alpha-effect are antisymmetric about the solar equator. Identifying longitudinal migration of active regions with their individual rotation rates and taking into account the internal differential rotation law within the SCZ known from helioseismology, we deduce the distribution of the effect over depth. We have found evidence that the alpha-effect changes its value and sign near the bottom of the SCZ, and this is in accord with the theoretical studies and numerical simulations. We discuss other regularities which can be revealed by further analysis such as possible dependence on longitude, time, and magnetic field strength, etc.
基金Supported by the National Natural Science Foundation of China.
文摘We present a study of the relationship between integral area and corresponding total magnetic flux for solar active regions. It is shown that some of these relationships are satisfied to simple power laws. Fractal examination showed that some of these power laws can not be justified inside the simple models of stationary magnetic flux tube aggregation. All magnetic fluxes and corresponding areas were calculated using the data measured with the Solar Magnetic Field Telescope of the Huairou Solar Observing Station in Beijing.
文摘Artifical neural networks (ANN) are now widely used successfully as tools for hith energy physics.The paper covers two aspects.First,mapping ANNs onto the proposed ring and linear systolic array provides an efficient implementation of VLSI-based architectures since in this case all connections among processing elements are local and regular,Second.it is discussed algorthmic organizing of such structures on the base of modular algebra whose use can provide an essential increase of system throughput.
基金Project supported by the Russian Foundation for Basic Research,Grant 99-01-00847the Russian Humanitarian Scientific Foundation,Grant 00-02-00152a,by the NNSF of China(19971047) and DSF
文摘In this paper,the asymptotic behavior of generalized risk processes without any momentassumptions on the controlling process is described.
