The infrared absorption spectra of different superconducting phase of high Tc super conductor Bi-Sb-Sr-Ca-Cu-O have been measured . The results show that only in the range of 400cm-1 -700cm-1,there is a group of peaks...The infrared absorption spectra of different superconducting phase of high Tc super conductor Bi-Sb-Sr-Ca-Cu-O have been measured . The results show that only in the range of 400cm-1 -700cm-1,there is a group of peaks which changes with different superconducting phases.According to group theory and infrared spectra of CuO, this group of peaks could be assigned to be the [CuO6]octahedron, the [CuO5] pyramid and the [CuO4]plane quadrilateral,but not CU-O plane or CU-O chain. Furthermore, the quasi-three dimensional Cu-O layers consisting of [CuO5] pyramids and proper coupling between them are essential factor for high Tc. It seems that the weaker compling of layers, the higher Tc展开更多
It is generally believed in academia that there are two theoretical explanations of tunneling and financing advantage for the creation of pyramidal structure. However, there is no definitive conclusion on which explan...It is generally believed in academia that there are two theoretical explanations of tunneling and financing advantage for the creation of pyramidal structure. However, there is no definitive conclusion on which explanation holds sway. Based on non-equilibrium panel data of seven years between 2004 and 2010, this empirical study uses the product market competition variables of ＂inter-sector competition＂ and ＂intra-sector competition＂ and the hierarchy and complexity of pyramidal structure, examines the correlation between pyramidal structure of Chinese private manufacturing listed firms and product market competition and patterns of change, and reveals the major causes of pyramidal structure. Empirical result indicates that, for Chinese private manufacturing listed companies, there is a significant negative correlation between product market competition and the hierarchy and complexity of pyramidal structure, which indicates that the creation of pyramidal structure has a preference on tunneling by controlling shareholders. On the basis of further considerations on corporate tunneling and financing restraint categorization, high-tunneling firms and firms with low financing restraint demonstrate significant tunneling motivations; low-tunneling firms and firms with high financing restraint demonstrate significant effect of financing advantage, which further testifies both theoretical explanations for the creation of pyramidal structure. Conclusions of these studies have not only enriched and supplemented relevant studies on the root causes for the creation of pyramidal structure by Chinese private business groups, but provide practical support for firms to make correct and effective use of pyramidal structure as well.展开更多
Detecting the moving vehicles in jittering traffic scenes is a very difficult problem because of the complex environment.Only by the color features of the pixel or only by the texture features of image cannot establis...Detecting the moving vehicles in jittering traffic scenes is a very difficult problem because of the complex environment.Only by the color features of the pixel or only by the texture features of image cannot establish a suitable background model for the moving vehicles. In order to solve this problem, the Gaussian pyramid layered algorithm is proposed, combining with the advantages of the Codebook algorithm and the Local binary patterns(LBP) algorithm. Firstly, the image pyramid is established to eliminate the noises generated by the camera shake. Then, codebook model and LBP model are constructed on the low-resolution level and the high-resolution level of Gaussian pyramid, respectively. At last, the final test results are obtained through a set of operations according to the spatial relations of pixels. The experimental results show that this algorithm can not only eliminate the noises effectively, but also save the calculating time with high detection sensitivity and high detection accuracy.展开更多
文摘The infrared absorption spectra of different superconducting phase of high Tc super conductor Bi-Sb-Sr-Ca-Cu-O have been measured . The results show that only in the range of 400cm-1 -700cm-1,there is a group of peaks which changes with different superconducting phases.According to group theory and infrared spectra of CuO, this group of peaks could be assigned to be the [CuO6]octahedron, the [CuO5] pyramid and the [CuO4]plane quadrilateral,but not CU-O plane or CU-O chain. Furthermore, the quasi-three dimensional Cu-O layers consisting of [CuO5] pyramids and proper coupling between them are essential factor for high Tc. It seems that the weaker compling of layers, the higher Tc
文摘It is generally believed in academia that there are two theoretical explanations of tunneling and financing advantage for the creation of pyramidal structure. However, there is no definitive conclusion on which explanation holds sway. Based on non-equilibrium panel data of seven years between 2004 and 2010, this empirical study uses the product market competition variables of ＂inter-sector competition＂ and ＂intra-sector competition＂ and the hierarchy and complexity of pyramidal structure, examines the correlation between pyramidal structure of Chinese private manufacturing listed firms and product market competition and patterns of change, and reveals the major causes of pyramidal structure. Empirical result indicates that, for Chinese private manufacturing listed companies, there is a significant negative correlation between product market competition and the hierarchy and complexity of pyramidal structure, which indicates that the creation of pyramidal structure has a preference on tunneling by controlling shareholders. On the basis of further considerations on corporate tunneling and financing restraint categorization, high-tunneling firms and firms with low financing restraint demonstrate significant tunneling motivations; low-tunneling firms and firms with high financing restraint demonstrate significant effect of financing advantage, which further testifies both theoretical explanations for the creation of pyramidal structure. Conclusions of these studies have not only enriched and supplemented relevant studies on the root causes for the creation of pyramidal structure by Chinese private business groups, but provide practical support for firms to make correct and effective use of pyramidal structure as well.
基金Project(61172047)supported by the National Natural Science Foundation of China
文摘Detecting the moving vehicles in jittering traffic scenes is a very difficult problem because of the complex environment.Only by the color features of the pixel or only by the texture features of image cannot establish a suitable background model for the moving vehicles. In order to solve this problem, the Gaussian pyramid layered algorithm is proposed, combining with the advantages of the Codebook algorithm and the Local binary patterns(LBP) algorithm. Firstly, the image pyramid is established to eliminate the noises generated by the camera shake. Then, codebook model and LBP model are constructed on the low-resolution level and the high-resolution level of Gaussian pyramid, respectively. At last, the final test results are obtained through a set of operations according to the spatial relations of pixels. The experimental results show that this algorithm can not only eliminate the noises effectively, but also save the calculating time with high detection sensitivity and high detection accuracy.
