There exists a Ghost region in the detection result of the traditional visual background extraction(ViBe)algorithm,and the foreground extraction is prone to false detection or missed detection due to environmental cha...There exists a Ghost region in the detection result of the traditional visual background extraction(ViBe)algorithm,and the foreground extraction is prone to false detection or missed detection due to environmental changes.Therefore,an improved ViBe algorithm based on adaptive detection of moving targets was proposed.Firstly,in the background model initialization process,the real background could be obtained by setting adjusting parameters in mean background modeling,and the ViBe background model was initialized by using the background.Secondly,in the foreground detection process,an adaptive radius threshold was introduced according to the scene change to adaptively detect the foreground.Finally,mathematical morphological close operation was used to fill the holes in the detection results.The experimental results show that the improved method can effectively suppress the Ghost region and detect the foreground target more completely under the condition of environmental changes.Compared with the traditional ViBe algorithm,the detection accuracy is improved by more than 10%,the false detection rate and the missed detection rate are reduced by 20% and 7% respectively.In addition,the improved method satisfies the real-time requirements.展开更多
Since Korea-Japan annexation in 1910, Japan has promoted the migration and/or tourism into colonial Chosun （old Korea） as an efficient cultural strategy for extending imperialism into Korean peninsula. In many tour ...Since Korea-Japan annexation in 1910, Japan has promoted the migration and/or tourism into colonial Chosun （old Korea） as an efficient cultural strategy for extending imperialism into Korean peninsula. In many tour guide books, the gisaeng （Korean female entertainers） was not only a symbol of Chosun tradition, but a main icon of Chosun tourism. The high class Korean-styled restaurants （yorijoem） were established as tourist attraction for Japanese inlanders, with singing and dancing gisaengs, ondol （Korean heating floor） house and Korean authentic cuisine, etc. The aim of this paper is firstly to explore the existential change of gisaengs in the yorijoem through its spatial significance in the 1930s, and secondly to explore the identity of Seoul local food culture and its metamorphosis under the colonial modernity.展开更多
Two model polygons in the Central Mongolia are considered for investigation of vegetation dynamics. They are located in rainless climatic zones -- arid and semiarid. For the emphasized polygons plots of the NDVI tempo...Two model polygons in the Central Mongolia are considered for investigation of vegetation dynamics. They are located in rainless climatic zones -- arid and semiarid. For the emphasized polygons plots of the NDVI temporal variation and NDVI maps of its multi-temporal values on the base of Landsat TM imagery are constructed. The full-scale landscape indication of the selected NDVI areas with different values with the step through 0.1 is conducted. This indication is supported by the analysis of vegetation to environmental groups for drought resistance. Almost the entire territory of the emphasized polygons vegetation digression during this period was traced. The analysis of the time variation of NDVI shows a decrease of its values. This indicates a trend xerophytization already sparse vegetation of Gobi. In the semiarid climatic zone a digression vegetation trend is directly related to heavy load on the pastures.展开更多
By phenomenologically describing the high-redshift star formation history, i.e., ,ρ.（z） oc [（1 ＋z）/4.5]-% and semi-analytically calculating the fractions of high-redshift Pop I/II and Pop II! stars, we investiga...By phenomenologically describing the high-redshift star formation history, i.e., ,ρ.（z） oc [（1 ＋z）/4.5]-% and semi-analytically calculating the fractions of high-redshift Pop I/II and Pop II! stars, we investigate the contributions from both high-redshfit Pop I/II and Pop II/stars to the observed near-infrared （3 μm 〈// 〈 5 μm） excess in the cosmic infrared background emission. In order to account for the observational level of the near-infrared excess, the power-law index or of the assumed star formation history is constrained to within the range of 0 ≤a≤1. Such a constraint is obtained under the condition that the viral temperature of dark matter halos belongs to the range of 500 K ≤ Tvir≤ 104 K.展开更多
基金National Natural Science Foundation of China(No.61761027)Postgraduate Education Reform Project of Lanzhou Jiaotong University(No.1600120101)。
文摘There exists a Ghost region in the detection result of the traditional visual background extraction(ViBe)algorithm,and the foreground extraction is prone to false detection or missed detection due to environmental changes.Therefore,an improved ViBe algorithm based on adaptive detection of moving targets was proposed.Firstly,in the background model initialization process,the real background could be obtained by setting adjusting parameters in mean background modeling,and the ViBe background model was initialized by using the background.Secondly,in the foreground detection process,an adaptive radius threshold was introduced according to the scene change to adaptively detect the foreground.Finally,mathematical morphological close operation was used to fill the holes in the detection results.The experimental results show that the improved method can effectively suppress the Ghost region and detect the foreground target more completely under the condition of environmental changes.Compared with the traditional ViBe algorithm,the detection accuracy is improved by more than 10%,the false detection rate and the missed detection rate are reduced by 20% and 7% respectively.In addition,the improved method satisfies the real-time requirements.
文摘Since Korea-Japan annexation in 1910, Japan has promoted the migration and/or tourism into colonial Chosun （old Korea） as an efficient cultural strategy for extending imperialism into Korean peninsula. In many tour guide books, the gisaeng （Korean female entertainers） was not only a symbol of Chosun tradition, but a main icon of Chosun tourism. The high class Korean-styled restaurants （yorijoem） were established as tourist attraction for Japanese inlanders, with singing and dancing gisaengs, ondol （Korean heating floor） house and Korean authentic cuisine, etc. The aim of this paper is firstly to explore the existential change of gisaengs in the yorijoem through its spatial significance in the 1930s, and secondly to explore the identity of Seoul local food culture and its metamorphosis under the colonial modernity.
基金Russian Foundation for Basic Research(120598066r_sibir_a)
文摘Two model polygons in the Central Mongolia are considered for investigation of vegetation dynamics. They are located in rainless climatic zones -- arid and semiarid. For the emphasized polygons plots of the NDVI temporal variation and NDVI maps of its multi-temporal values on the base of Landsat TM imagery are constructed. The full-scale landscape indication of the selected NDVI areas with different values with the step through 0.1 is conducted. This indication is supported by the analysis of vegetation to environmental groups for drought resistance. Almost the entire territory of the emphasized polygons vegetation digression during this period was traced. The analysis of the time variation of NDVI shows a decrease of its values. This indicates a trend xerophytization already sparse vegetation of Gobi. In the semiarid climatic zone a digression vegetation trend is directly related to heavy load on the pastures.
基金supported by the National Natural Science Foundation of China (Grant No.11103004)the Foundation for the Authors of National Excellent Doctoral Dissertations of China (Grant No.201225)
文摘By phenomenologically describing the high-redshift star formation history, i.e., ,ρ.（z） oc [（1 ＋z）/4.5]-% and semi-analytically calculating the fractions of high-redshift Pop I/II and Pop II! stars, we investigate the contributions from both high-redshfit Pop I/II and Pop II/stars to the observed near-infrared （3 μm 〈// 〈 5 μm） excess in the cosmic infrared background emission. In order to account for the observational level of the near-infrared excess, the power-law index or of the assumed star formation history is constrained to within the range of 0 ≤a≤1. Such a constraint is obtained under the condition that the viral temperature of dark matter halos belongs to the range of 500 K ≤ Tvir≤ 104 K.
