The inversions of complex geophysical data always solve multi-parameter, nonlinear, and multimodal optimization problems. Searching for the optimal inversion solutions is similar to the social behavior observed in swa...The inversions of complex geophysical data always solve multi-parameter, nonlinear, and multimodal optimization problems. Searching for the optimal inversion solutions is similar to the social behavior observed in swarms such as birds and ants when searching for food. In this article, first the particle swarm optimization algorithm was described in detail, and ant colony algorithm improved. Then the methods were applied to three different kinds of geophysical inversion problems： （1） a linear problem which is sensitive to noise, （2） a synchronous inversion of linear and nonlinear problems, and （3） a nonlinear problem. The results validate their feasibility and efficiency. Compared with the conventional genetic algorithm and simulated annealing, they have the advantages of higher convergence speed and accuracy. Compared with the quasi-Newton method and Levenberg-Marquardt method, they work better with the ability to overcome the locally optimal solutions.展开更多
地球观测组织GEO(Group on Earth Observations)是地球观测领域规模最大和最具影响力的政府间国际组织,中国是地球观测组织创始国之一,自2005年地球观测组织成立起一直担任代表发展中国家和亚洲大洋洲区域的联合主席国。本文对地球观测...地球观测组织GEO(Group on Earth Observations)是地球观测领域规模最大和最具影响力的政府间国际组织,中国是地球观测组织创始国之一,自2005年地球观测组织成立起一直担任代表发展中国家和亚洲大洋洲区域的联合主席国。本文对地球观测组织过去18年的发展实践历程进行了回顾与总结,论述了中国在国内、亚洲大洋洲和国际3个层面的相关工作成果,从治理机制、项目合作、公共产品、人才队伍4个方面设计了中国未来参与地球观测组织全球治理,加速融入全球创新网络,携手构建全球科技共同体的工作内容体系。展开更多
基金supported by the 973 Program(Grant No 2007CB209600)Open Fund(No.GDL0706) of the Key Laboratory of Geo-detection(China University of Geosciences,Beijing),Ministry of Education
文摘The inversions of complex geophysical data always solve multi-parameter, nonlinear, and multimodal optimization problems. Searching for the optimal inversion solutions is similar to the social behavior observed in swarms such as birds and ants when searching for food. In this article, first the particle swarm optimization algorithm was described in detail, and ant colony algorithm improved. Then the methods were applied to three different kinds of geophysical inversion problems： （1） a linear problem which is sensitive to noise, （2） a synchronous inversion of linear and nonlinear problems, and （3） a nonlinear problem. The results validate their feasibility and efficiency. Compared with the conventional genetic algorithm and simulated annealing, they have the advantages of higher convergence speed and accuracy. Compared with the quasi-Newton method and Levenberg-Marquardt method, they work better with the ability to overcome the locally optimal solutions.
文摘地球观测组织GEO(Group on Earth Observations)是地球观测领域规模最大和最具影响力的政府间国际组织,中国是地球观测组织创始国之一,自2005年地球观测组织成立起一直担任代表发展中国家和亚洲大洋洲区域的联合主席国。本文对地球观测组织过去18年的发展实践历程进行了回顾与总结,论述了中国在国内、亚洲大洋洲和国际3个层面的相关工作成果,从治理机制、项目合作、公共产品、人才队伍4个方面设计了中国未来参与地球观测组织全球治理,加速融入全球创新网络,携手构建全球科技共同体的工作内容体系。
