Aba Prefecture Company Name:Sichuan Xintong New Materials Co.Ltd. Address:Shuimo,Wenchuan Nature of Business:Private Project Name:Processing and Sale of Tourism Products Details:Producing and processing of Natural cry...Aba Prefecture Company Name:Sichuan Xintong New Materials Co.Ltd. Address:Shuimo,Wenchuan Nature of Business:Private Project Name:Processing and Sale of Tourism Products Details:Producing and processing of Natural crystal products,man-made gem and other展开更多
This paper presents a practical iterative algorithm for two-view metric reconstruction without any prior knowledge about the scene and motion in a nonsingular geometry configuration. The principal point is assumed to ...This paper presents a practical iterative algorithm for two-view metric reconstruction without any prior knowledge about the scene and motion in a nonsingular geometry configuration. The principal point is assumed to locate at the image center with zero skew and the same aspect ratio, and the interior parameters are fixed, so the self-calibration becomes focal-length cali- bration. Existing focal length calibration methods are direct solutions of a quadric composed of fundamental matrix, which are sensitive to noise. A quaternion-based linear iterative Least-Square Method is proposed in this paper, and one-dimensional searching for optimal focal length in a constrained region instead of solving optimization problems with inequality constraints is applied to simplify the computation complexity, then unique rotational matrix and translate vector are recovered. Experiments with simulation data and real images are given to verify the algorithm.展开更多
This paper investigates China's government-business relations in an international context. In general, it argues that since China was incorporated into the European international system in the mid-19 th century, t...This paper investigates China's government-business relations in an international context. In general, it argues that since China was incorporated into the European international system in the mid-19 th century, the motive of survival and competition has gradually come to dominate the political practices of the Chinese elites, and this is especially the case since 1949 when an autonomous state was finally created. Furthermore, a particular international context often induces a corresponding state reaction. The Cold War structure and conditions of late development pressed the Chinese state to centralize its power and engage in forceful industrialization through a central planning system. This then created an extreme form of governmentbusiness relations, with overwhelming power residing with the former. Later on, after China moved closer to the United States in terms of world politics, and when the Cold War structure was replaced by a multi-polar structure characterized by American hegemony, coinciding with the rapid expansion of the world market and the change of development conditions to compressed development, the Chinese state engaged in economic liberalization and decentralization. This resulted in a substantial modification of the power balance between the state and business, and gave rise to various forms of government-business relations.展开更多
The concepts of logically constrained overall systems and subsystems of recon-structability analysis are introduced. Then the paper gave an important basis for furtherresearches of the author-the sufficient conditions...The concepts of logically constrained overall systems and subsystems of recon-structability analysis are introduced. Then the paper gave an important basis for furtherresearches of the author-the sufficient conditions for their structural representation graphsto become Boolean lattices, and proved it.展开更多
This study explores the implementation of computed tomography(CT)reconstruction and simulation techniques for patient-specific valves,aiming to dissect the mechanical attributes of calcified valves within transcathete...This study explores the implementation of computed tomography(CT)reconstruction and simulation techniques for patient-specific valves,aiming to dissect the mechanical attributes of calcified valves within transcatheter heart valve replacement(TAVR)procedures.In order to facilitate this exploration,it derives pertinent formulas for 3D multi-material isogeometric hyperelastic analysis based on Hounsfield unit(HU)values,thereby unlocking foundational capabilities for isogeometric analysis in calcified aortic valves.A series of uniaxial and biaxial tensile tests is executed to obtain an accurate constitutive model for calcified active valves.To mitigate discretization errors,methodologies for reconstructing volumetric parametric models,integrating both geometric and material attributes,are introduced.Applying these analytical formulas,constitutive models,and precise analytical models to isogeometric analyses of calcified valves,the research ascertains their close alignment with experimental results through the close fit in displacement-stress curves,compellingly validating the accuracy and reliability of the method.This study presents a step-by-step approach to analyzing themechanical characteristics of patient-specific valves obtained fromCT images,holding significant clinical implications and assisting in the selection of treatment strategies and surgical intervention approaches in TAVR procedures.展开更多
After a brief review of the basic notions the paper defines the G^L-structuresand their partial ordering. On this basis, the paper proves the necessary and sufficientconditions for G^L-structures to form bounded latti...After a brief review of the basic notions the paper defines the G^L-structuresand their partial ordering. On this basis, the paper proves the necessary and sufficientconditions for G^L-structures to form bounded lattices.展开更多
文摘Aba Prefecture Company Name:Sichuan Xintong New Materials Co.Ltd. Address:Shuimo,Wenchuan Nature of Business:Private Project Name:Processing and Sale of Tourism Products Details:Producing and processing of Natural crystal products,man-made gem and other
文摘This paper presents a practical iterative algorithm for two-view metric reconstruction without any prior knowledge about the scene and motion in a nonsingular geometry configuration. The principal point is assumed to locate at the image center with zero skew and the same aspect ratio, and the interior parameters are fixed, so the self-calibration becomes focal-length cali- bration. Existing focal length calibration methods are direct solutions of a quadric composed of fundamental matrix, which are sensitive to noise. A quaternion-based linear iterative Least-Square Method is proposed in this paper, and one-dimensional searching for optimal focal length in a constrained region instead of solving optimization problems with inequality constraints is applied to simplify the computation complexity, then unique rotational matrix and translate vector are recovered. Experiments with simulation data and real images are given to verify the algorithm.
文摘This paper investigates China's government-business relations in an international context. In general, it argues that since China was incorporated into the European international system in the mid-19 th century, the motive of survival and competition has gradually come to dominate the political practices of the Chinese elites, and this is especially the case since 1949 when an autonomous state was finally created. Furthermore, a particular international context often induces a corresponding state reaction. The Cold War structure and conditions of late development pressed the Chinese state to centralize its power and engage in forceful industrialization through a central planning system. This then created an extreme form of governmentbusiness relations, with overwhelming power residing with the former. Later on, after China moved closer to the United States in terms of world politics, and when the Cold War structure was replaced by a multi-polar structure characterized by American hegemony, coinciding with the rapid expansion of the world market and the change of development conditions to compressed development, the Chinese state engaged in economic liberalization and decentralization. This resulted in a substantial modification of the power balance between the state and business, and gave rise to various forms of government-business relations.
文摘The concepts of logically constrained overall systems and subsystems of recon-structability analysis are introduced. Then the paper gave an important basis for furtherresearches of the author-the sufficient conditions for their structural representation graphsto become Boolean lattices, and proved it.
基金supported by the Natural Science Foundation of China(Project Nos.52075340 and 61972011)the Shanghai Special Research Project on Aging Population and Maternal and Child Health(Project No.2020YJZX0106).
文摘This study explores the implementation of computed tomography(CT)reconstruction and simulation techniques for patient-specific valves,aiming to dissect the mechanical attributes of calcified valves within transcatheter heart valve replacement(TAVR)procedures.In order to facilitate this exploration,it derives pertinent formulas for 3D multi-material isogeometric hyperelastic analysis based on Hounsfield unit(HU)values,thereby unlocking foundational capabilities for isogeometric analysis in calcified aortic valves.A series of uniaxial and biaxial tensile tests is executed to obtain an accurate constitutive model for calcified active valves.To mitigate discretization errors,methodologies for reconstructing volumetric parametric models,integrating both geometric and material attributes,are introduced.Applying these analytical formulas,constitutive models,and precise analytical models to isogeometric analyses of calcified valves,the research ascertains their close alignment with experimental results through the close fit in displacement-stress curves,compellingly validating the accuracy and reliability of the method.This study presents a step-by-step approach to analyzing themechanical characteristics of patient-specific valves obtained fromCT images,holding significant clinical implications and assisting in the selection of treatment strategies and surgical intervention approaches in TAVR procedures.
文摘After a brief review of the basic notions the paper defines the G^L-structuresand their partial ordering. On this basis, the paper proves the necessary and sufficientconditions for G^L-structures to form bounded lattices.
