With the developing of the computer, the network is more and more liked by the users. It has become an indispensable part of the living and production. However, with the expanding of network scale, there have been som...With the developing of the computer, the network is more and more liked by the users. It has become an indispensable part of the living and production. However, with the expanding of network scale, there have been some problems in the operation of the network system. Most of people lack of understanding on these issues, so they couldn＇ t handle them well. Some people use the theory of phase transitions to explain the power law phenomena in computer network. But it only start from the theory, but ignores the correlation of network nodes. The lack of holistic thinking mode, make the development of computer network get into a stray area. This paper started from the phase transition theory, elaborated the connotations of phase transformation and the overall correlation, and described the problems about them.展开更多
As one of the fundamental social rights, the right to education not only con- ,cerns the fact that the educated can equally enjoy educa- tional opportunities, but also lays the foundation for exercising their rights i...As one of the fundamental social rights, the right to education not only con- ,cerns the fact that the educated can equally enjoy educa- tional opportunities, but also lays the foundation for exercising their rights in other aspects, such as employ- ment, politics, culture and society, therefore creating the conditions for realizing the all-round development of human beings. During the process of social construction in China, we have attached great significance to protecting citizens＇ rights to receive education, thus ensuring the prior- ity of developing education in our nation. Meanwhile,展开更多
Human survival and develop-ment are closely linked with the lifesciences. Agriculture, population,medicine, the environment andecology, all of them are inseparablefrom the development of life sci-ences and technologie...Human survival and develop-ment are closely linked with the lifesciences. Agriculture, population,medicine, the environment andecology, all of them are inseparablefrom the development of life sci-ences and technologies, and it is onlife sciences that the human racedepends for sustainable economicdevelopment in the future.展开更多
We propose an approach for tuning the three-dimensional polarization of a focusing subwavelength spot by a high numerical aperture objective. The incident beams are composed of a radially polarized beam, an azimuthall...We propose an approach for tuning the three-dimensional polarization of a focusing subwavelength spot by a high numerical aperture objective. The incident beams are composed of a radially polarized beam, an azimuthally polarized beam, and a linearly polarized beam with three different weighting factors, respectively. A specially designed adjustable amplitude angular selector is also inserted at the back aperture of the objective for tuning the polarization azimuthally. It is shown that any desired overall polarization orientation can be obtained. We calculated the overall polarization orientation in the focal volume. It is found that the polar angle of the overall polarization orientation can be arbitrarily tuned by the combination of a radially polarized beam and a linearly polarized beam with different weighting factors, and the azimuthal angle can be tuned by rotating the orientation of the linearly polarized beam azimuthally.展开更多
Looking back at the developments in the past five years(2007-2012),the first is fermentation of the U.S.subprime mortgage crisis in 2007,which fused the outbreak of the international financial crisis in the following ...Looking back at the developments in the past five years(2007-2012),the first is fermentation of the U.S.subprime mortgage crisis in 2007,which fused the outbreak of the international financial crisis in the following year.The year 2008 is the year of real"turning point",on September 15th,the century-old Lehman Brothers on Wall Street closed down surprisingly and detonated the on-going financial crisis,the world then entered a展开更多
The Chinese foreign policy with principled,theoretical and innovative presentation by the documents of the CPC Eighteenth National Congress reflects the continuity and innovation of China’s diplomacy,on the one hand,...The Chinese foreign policy with principled,theoretical and innovative presentation by the documents of the CPC Eighteenth National Congress reflects the continuity and innovation of China’s diplomacy,on the one hand,is a farsighted summary of China’s diplomacy in the past 10 years,and is also the response to challenges posed by profound changes in the world situation on the other.展开更多
文摘With the developing of the computer, the network is more and more liked by the users. It has become an indispensable part of the living and production. However, with the expanding of network scale, there have been some problems in the operation of the network system. Most of people lack of understanding on these issues, so they couldn＇ t handle them well. Some people use the theory of phase transitions to explain the power law phenomena in computer network. But it only start from the theory, but ignores the correlation of network nodes. The lack of holistic thinking mode, make the development of computer network get into a stray area. This paper started from the phase transition theory, elaborated the connotations of phase transformation and the overall correlation, and described the problems about them.
文摘As one of the fundamental social rights, the right to education not only con- ,cerns the fact that the educated can equally enjoy educa- tional opportunities, but also lays the foundation for exercising their rights in other aspects, such as employ- ment, politics, culture and society, therefore creating the conditions for realizing the all-round development of human beings. During the process of social construction in China, we have attached great significance to protecting citizens＇ rights to receive education, thus ensuring the prior- ity of developing education in our nation. Meanwhile,
文摘Human survival and develop-ment are closely linked with the lifesciences. Agriculture, population,medicine, the environment andecology, all of them are inseparablefrom the development of life sci-ences and technologies, and it is onlife sciences that the human racedepends for sustainable economicdevelopment in the future.
基金supported by the National Natural Science Foundation of China(Nos.61675093 and 61775140)the Shandong Natural Science Foundation(No.ZR2017MA035)
文摘We propose an approach for tuning the three-dimensional polarization of a focusing subwavelength spot by a high numerical aperture objective. The incident beams are composed of a radially polarized beam, an azimuthally polarized beam, and a linearly polarized beam with three different weighting factors, respectively. A specially designed adjustable amplitude angular selector is also inserted at the back aperture of the objective for tuning the polarization azimuthally. It is shown that any desired overall polarization orientation can be obtained. We calculated the overall polarization orientation in the focal volume. It is found that the polar angle of the overall polarization orientation can be arbitrarily tuned by the combination of a radially polarized beam and a linearly polarized beam with different weighting factors, and the azimuthal angle can be tuned by rotating the orientation of the linearly polarized beam azimuthally.
文摘Looking back at the developments in the past five years(2007-2012),the first is fermentation of the U.S.subprime mortgage crisis in 2007,which fused the outbreak of the international financial crisis in the following year.The year 2008 is the year of real"turning point",on September 15th,the century-old Lehman Brothers on Wall Street closed down surprisingly and detonated the on-going financial crisis,the world then entered a
文摘The Chinese foreign policy with principled,theoretical and innovative presentation by the documents of the CPC Eighteenth National Congress reflects the continuity and innovation of China’s diplomacy,on the one hand,is a farsighted summary of China’s diplomacy in the past 10 years,and is also the response to challenges posed by profound changes in the world situation on the other.
