The accurate understanding of atmospheric aerosol extinction coefficients is very important for at- mospheric science research. To achieve a fast and simple method for determining the parameters, the selection of opti...The accurate understanding of atmospheric aerosol extinction coefficients is very important for at- mospheric science research. To achieve a fast and simple method for determining the parameters, the selection of optimal forward-scattering angles of atmospheric aerosols is required. In this paper, the authors introduce the detec- tion basis of forward-scattering of atmospheric aerosols, and the authors verify the sensitivity of the phase function to the real part of the complex refractive index. The au- thors use the Jaenicke urban aerosol model to determine that forward-scattering angles near 33° are suitable. However, the optimal forward-scattering angles in North China are between 37° and 40°. Numerical simulation shows that certain types of particle size distribution of newly generated particles and pollution have limited in- fluences on the selection of forward-scattering angles. But the ranges of these insensitive angles shift - 10 degrees for dust intrusion, and the relative deviations of the phase function are less than 5.0% within extra angles of 0° to 3°. This study can serve as a reference for the selection of optimal forward-scattering angles for visibility meters and Present Weather Identifiers （PWIs） in addition to the de- tection of forward-scattering optical properties.展开更多
Quantum communications helps us to enhance the security and efficiency of communications and to deepen our understanding of quantum physics. Its rapid development in recent years has attracted the interest of research...Quantum communications helps us to enhance the security and efficiency of communications and to deepen our understanding of quantum physics. Its rapid development in recent years has attracted the interest of researchers from diverse fields such as physics, mathematics, and computer science. We review the background and current state of quantum communications technology, with an emphasis on quantum key distribution, quantum random number generation, and a relatively hot topic: device independent protocols.展开更多
Digital Chinese medicine(DCM)is an emerging interdisciplinary field developed from traditional Chinese medicine(TCM)and information science.In this article,we consider the significance and propose an architecture for ...Digital Chinese medicine(DCM)is an emerging interdisciplinary field developed from traditional Chinese medicine(TCM)and information science.In this article,we consider the significance and propose an architecture for DCM research,and highlight the key tasks that need to be performed to provide references for the integration of information science into Chinese medicine research.展开更多
The paper first gives a brief overview of the use of statistical methods in sociology in order to show the continuity and importance of these methods in the development of sociology as a science. Therefore, education ...The paper first gives a brief overview of the use of statistical methods in sociology in order to show the continuity and importance of these methods in the development of sociology as a science. Therefore, education of sociologists requires, among other things, training in statistical methods applicable in data processing and analysis in sociological research. Then the research continues with a comparative analysis of the curricula of undergraduate academic studies of sociology, and especially the presence of statistics teaching in them, in the Republic of Serbia and the neighbouring countries. Different programs of the Department of Sociology of the Faculty of Philosophy in Novi Sad are analyzed together with the results of the students＇ evaluations for the academic years 2007/2008 and 2009/2010.展开更多
基金supported mainly by the China Meteorological Administration under Grant GYHY200806031supported by the Chinese Academy of Sciences under Grant XDA05040302
文摘The accurate understanding of atmospheric aerosol extinction coefficients is very important for at- mospheric science research. To achieve a fast and simple method for determining the parameters, the selection of optimal forward-scattering angles of atmospheric aerosols is required. In this paper, the authors introduce the detec- tion basis of forward-scattering of atmospheric aerosols, and the authors verify the sensitivity of the phase function to the real part of the complex refractive index. The au- thors use the Jaenicke urban aerosol model to determine that forward-scattering angles near 33° are suitable. However, the optimal forward-scattering angles in North China are between 37° and 40°. Numerical simulation shows that certain types of particle size distribution of newly generated particles and pollution have limited in- fluences on the selection of forward-scattering angles. But the ranges of these insensitive angles shift - 10 degrees for dust intrusion, and the relative deviations of the phase function are less than 5.0% within extra angles of 0° to 3°. This study can serve as a reference for the selection of optimal forward-scattering angles for visibility meters and Present Weather Identifiers （PWIs） in addition to the de- tection of forward-scattering optical properties.
基金supported by the National Basic Research Program of China under Grants No. 2011CBA00200 No. 2011CB921200+2 种基金National Natural Science Foundation of China under Grants No. 60921091 No. 61101137 No. 61201239
文摘Quantum communications helps us to enhance the security and efficiency of communications and to deepen our understanding of quantum physics. Its rapid development in recent years has attracted the interest of researchers from diverse fields such as physics, mathematics, and computer science. We review the background and current state of quantum communications technology, with an emphasis on quantum key distribution, quantum random number generation, and a relatively hot topic: device independent protocols.
文摘Digital Chinese medicine(DCM)is an emerging interdisciplinary field developed from traditional Chinese medicine(TCM)and information science.In this article,we consider the significance and propose an architecture for DCM research,and highlight the key tasks that need to be performed to provide references for the integration of information science into Chinese medicine research.
文摘The paper first gives a brief overview of the use of statistical methods in sociology in order to show the continuity and importance of these methods in the development of sociology as a science. Therefore, education of sociologists requires, among other things, training in statistical methods applicable in data processing and analysis in sociological research. Then the research continues with a comparative analysis of the curricula of undergraduate academic studies of sociology, and especially the presence of statistics teaching in them, in the Republic of Serbia and the neighbouring countries. Different programs of the Department of Sociology of the Faculty of Philosophy in Novi Sad are analyzed together with the results of the students＇ evaluations for the academic years 2007/2008 and 2009/2010.
