To analyze the stability of nearly zero flattened dispersion, the dispersion deviations for three kinds of PCFs are calculated when the hole diameters deviate from their designed values. Numerical results show that ar...To analyze the stability of nearly zero flattened dispersion, the dispersion deviations for three kinds of PCFs are calculated when the hole diameters deviate from their designed values. Numerical results show that around the wavelength of 1.55 μm, the dispersion deviations of both the PCF with three-fold symmetry core and the PCF with hexagonal lattice are much less than that of the PCF with different hole diameters in different rings. Therefore, the stabilities of nearly zero flattened dispersion of the first two kinds of PCFs are much better than that of the last one. Considering the confinement loss, the PCF with three-fold symmetry core is preferable to practical use.展开更多
As the outcome of the encounter of Chinese and Western cultures and modes of thinking, Mao Zedong＇s dialectics contains considerable elements of traditional Chinese dialectics. Mao advocated differentiation between p...As the outcome of the encounter of Chinese and Western cultures and modes of thinking, Mao Zedong＇s dialectics contains considerable elements of traditional Chinese dialectics. Mao advocated differentiation between principal and secondary contradictions and between the principal and secondary aspects of a contradiction; but more importantly, he also emphasized that each can transform into its opposite under certain conditions and attached considerable importance to the ＂quintessence＂ of a contradiction, ideas which are alien to traditional Western dialectics. This makes Mao＇s dialectics distinctive, so that it constitutes a model of the integration （not without tension） of Chinese and Western patterns of thinking. A deeper understanding of this model will be of great benefit to the revival and development of contemporary Chinese philosophy.展开更多
文摘To analyze the stability of nearly zero flattened dispersion, the dispersion deviations for three kinds of PCFs are calculated when the hole diameters deviate from their designed values. Numerical results show that around the wavelength of 1.55 μm, the dispersion deviations of both the PCF with three-fold symmetry core and the PCF with hexagonal lattice are much less than that of the PCF with different hole diameters in different rings. Therefore, the stabilities of nearly zero flattened dispersion of the first two kinds of PCFs are much better than that of the last one. Considering the confinement loss, the PCF with three-fold symmetry core is preferable to practical use.
文摘As the outcome of the encounter of Chinese and Western cultures and modes of thinking, Mao Zedong＇s dialectics contains considerable elements of traditional Chinese dialectics. Mao advocated differentiation between principal and secondary contradictions and between the principal and secondary aspects of a contradiction; but more importantly, he also emphasized that each can transform into its opposite under certain conditions and attached considerable importance to the ＂quintessence＂ of a contradiction, ideas which are alien to traditional Western dialectics. This makes Mao＇s dialectics distinctive, so that it constitutes a model of the integration （not without tension） of Chinese and Western patterns of thinking. A deeper understanding of this model will be of great benefit to the revival and development of contemporary Chinese philosophy.
