This paper reviews the recent advances of practical techniques within different method frameworks for improved uncertainty propagation in orbital dynamics.The uncertainty propagation problem has been explored in many ...This paper reviews the recent advances of practical techniques within different method frameworks for improved uncertainty propagation in orbital dynamics.The uncertainty propagation problem has been explored in many applications in orbital dynamics,such as orbit determination,relative motion,space debris removal,and small body exploration.In recent years,to further improve the accuracy and efficiency of uncertainty propagation,many practical techniques have been presented within different method frameworks.Among these,most techniques are within the frameworks of the continuity equation,the Gaussian mixture model,and the surrogate model.To facilitate the research work for nonlinear uncertainty propagation in orbital dynamics,a classification of the present method frameworks and the practical techniques for improved uncertainty propagation within different method frameworks is given and discussed in this paper.展开更多
Dear Editor： Chronic total occlusions （CTOs） of the coronary artery are commonly encountered complex lesionst11. Percutaneous coronary intervention （PCI） for CTO is technically challenging due to low procedural ...Dear Editor： Chronic total occlusions （CTOs） of the coronary artery are commonly encountered complex lesionst11. Percutaneous coronary intervention （PCI） for CTO is technically challenging due to low procedural success ratesTM. Microcatheter is one of the important devices for treatment of CTOTM. It has been widely used attributed to the excellent crossability whenever angula- tion and tortuousity of the coronary artery is encoun- tered. In the process, the microcatheter has to be withdrawn from the guide wire after the wire is proved to locate in the true lumen.展开更多
基金supported by the Scientific Research Foundation of Changzhou College of Information Technology(Grant No.SGA070300020395)the Natural Science Research Projects in Colleges and Universities of Jiangsu Province(Grant No.25KJD590001)the National Natural Science Foundation of China(Grant No.11672126)。
文摘This paper reviews the recent advances of practical techniques within different method frameworks for improved uncertainty propagation in orbital dynamics.The uncertainty propagation problem has been explored in many applications in orbital dynamics,such as orbit determination,relative motion,space debris removal,and small body exploration.In recent years,to further improve the accuracy and efficiency of uncertainty propagation,many practical techniques have been presented within different method frameworks.Among these,most techniques are within the frameworks of the continuity equation,the Gaussian mixture model,and the surrogate model.To facilitate the research work for nonlinear uncertainty propagation in orbital dynamics,a classification of the present method frameworks and the practical techniques for improved uncertainty propagation within different method frameworks is given and discussed in this paper.
文摘Dear Editor： Chronic total occlusions （CTOs） of the coronary artery are commonly encountered complex lesionst11. Percutaneous coronary intervention （PCI） for CTO is technically challenging due to low procedural success ratesTM. Microcatheter is one of the important devices for treatment of CTOTM. It has been widely used attributed to the excellent crossability whenever angula- tion and tortuousity of the coronary artery is encoun- tered. In the process, the microcatheter has to be withdrawn from the guide wire after the wire is proved to locate in the true lumen.
