This paper presents a supervised classification method of sonar image, which takes advantages of both multi-fractal theory and wavelet analysis. In the process of feature extraction, image transformation and wavelet d...This paper presents a supervised classification method of sonar image, which takes advantages of both multi-fractal theory and wavelet analysis. In the process of feature extraction, image transformation and wavelet decomposition are combined and a feature set based on multi-fractal dimension is obtained. In the part of classifier construction, the Learning Vector Quantization (LVQ) network is adopted as a classifier. Experiments of sonar image classification were carried out with satisfactory results, which verify the effectiveness of this method.展开更多
AIM： To describe a quantitative analysis method for liver biopsy sections with a machine that we have named ＂Dioguardi Histological Metriser＂ which automatically measures the residual hepatocyte mass （including he...AIM： To describe a quantitative analysis method for liver biopsy sections with a machine that we have named ＂Dioguardi Histological Metriser＂ which automatically measures the residual hepatocyte mass （including hepatocytes vacuolization）, inflammation, fibrosis and the loss of liver tissue tectonics.METHODS： We analysed digitised images of liver biopsy sections taken from 398 patients, The analysis with Dioguardi Histological Metriser was validated by comparison with semi-quantitative scoring system.RESULTS： The method provides： （1） the metrical extension in two-dimensions （the plane） of the residual hepatocellular set, including the area of vacuoles pertinent to abnormal lipid accumulation; （2） the geo- metric measure of the inflammation basin, which distinguishes intra-basin space and extra-basin dispersed parenchymal leukoo/tes; （3） the magnitude of collagen islets, （which were considered truncated fractals and classified into three degrees of magnitude）; and （4） the tectonic index that quantifies alterations （disorders） in the organization of liver tissue. Dioguardi Histological Metriser machine allows to work at a speed of 0.1 mm^2/s, scanning a whole section in 6-8 min.CONCLUSION： The results are the first standardized metrical evaluation of the geometric properties of the parenchyma, inflammation, fibrosis, and alterations in liver tissue tectonics of the biopsy sections. The present study confirms that biopsies are still valuable, not only for diagnosing chronic hepatitis, but also for quantifying changes in the organization and order of liver tissue structure.展开更多
The detailed structures of the volcanic edifice and plumbing system of the early Permian Tarim flood basalt were investigated by three-dimensional seismic imaging. The images show that the Tarim flood basalt erupted f...The detailed structures of the volcanic edifice and plumbing system of the early Permian Tarim flood basalt were investigated by three-dimensional seismic imaging. The images show that the Tarim flood basalt erupted from central volcanoes distributed along major faults. The uppermost magma formed a single lava lobe with a volume of *0.74 km3 and an aspect ratio of 50,implying a sheet flow eruption with a high effusion rate. At the subsurface level, all central volcanoes, irrespective of size, had a separate pipe-like feeder vent. Only thirteen dikes were identified at shallow depths of \100 m below the lava surface; deeper dikes were even rarer. The pipelike plumbing system and the paucity of dilational dikes were different from the typical plumbing system of flood basalt provinces on Earth, which are normally buoyancycontrolled dike–sill networks. A gas-driven vigorous eruption can be inferred from the imaged structure, which means that the Tarim flood basalt may have carried and released a large proportion of volcanic gas, similar to some mafic volcaniclastic deposit-bearing continental flood basalt provinces.展开更多
文摘This paper presents a supervised classification method of sonar image, which takes advantages of both multi-fractal theory and wavelet analysis. In the process of feature extraction, image transformation and wavelet decomposition are combined and a feature set based on multi-fractal dimension is obtained. In the part of classifier construction, the Learning Vector Quantization (LVQ) network is adopted as a classifier. Experiments of sonar image classification were carried out with satisfactory results, which verify the effectiveness of this method.
基金Supported by Istituto Clinico Humanitas IRCCS, Rozzano, MI, the "Michele Rodriguez" Foundation-Institute for Quantitative Measures in Medicine, Milan, Italy
文摘AIM： To describe a quantitative analysis method for liver biopsy sections with a machine that we have named ＂Dioguardi Histological Metriser＂ which automatically measures the residual hepatocyte mass （including hepatocytes vacuolization）, inflammation, fibrosis and the loss of liver tissue tectonics.METHODS： We analysed digitised images of liver biopsy sections taken from 398 patients, The analysis with Dioguardi Histological Metriser was validated by comparison with semi-quantitative scoring system.RESULTS： The method provides： （1） the metrical extension in two-dimensions （the plane） of the residual hepatocellular set, including the area of vacuoles pertinent to abnormal lipid accumulation; （2） the geo- metric measure of the inflammation basin, which distinguishes intra-basin space and extra-basin dispersed parenchymal leukoo/tes; （3） the magnitude of collagen islets, （which were considered truncated fractals and classified into three degrees of magnitude）; and （4） the tectonic index that quantifies alterations （disorders） in the organization of liver tissue. Dioguardi Histological Metriser machine allows to work at a speed of 0.1 mm^2/s, scanning a whole section in 6-8 min.CONCLUSION： The results are the first standardized metrical evaluation of the geometric properties of the parenchyma, inflammation, fibrosis, and alterations in liver tissue tectonics of the biopsy sections. The present study confirms that biopsies are still valuable, not only for diagnosing chronic hepatitis, but also for quantifying changes in the organization and order of liver tissue structure.
基金supported by the National Basic Research Program of China(2010CB808906)the National Natural Science Foundation of China(41272368)to WT
文摘The detailed structures of the volcanic edifice and plumbing system of the early Permian Tarim flood basalt were investigated by three-dimensional seismic imaging. The images show that the Tarim flood basalt erupted from central volcanoes distributed along major faults. The uppermost magma formed a single lava lobe with a volume of *0.74 km3 and an aspect ratio of 50,implying a sheet flow eruption with a high effusion rate. At the subsurface level, all central volcanoes, irrespective of size, had a separate pipe-like feeder vent. Only thirteen dikes were identified at shallow depths of \100 m below the lava surface; deeper dikes were even rarer. The pipelike plumbing system and the paucity of dilational dikes were different from the typical plumbing system of flood basalt provinces on Earth, which are normally buoyancycontrolled dike–sill networks. A gas-driven vigorous eruption can be inferred from the imaged structure, which means that the Tarim flood basalt may have carried and released a large proportion of volcanic gas, similar to some mafic volcaniclastic deposit-bearing continental flood basalt provinces.
