In Rayleigh wave exploration,the inversion of dispersion curves is a crucial step for obtaining subsurface stratigraphic information,characterized by its multi-parameter and multi-extremum nature.Local optimization al...In Rayleigh wave exploration,the inversion of dispersion curves is a crucial step for obtaining subsurface stratigraphic information,characterized by its multi-parameter and multi-extremum nature.Local optimization algorithms used in dispersion curve inversion are highly dependent on the initial model and are prone to being trapped in local optima,while classical global optimization algorithms often suffer from slow convergence and low solution accuracy.To address these issues,this study introduces the Osprey Optimization Algorithm(OOA),known for its strong global search and local exploitation capabilities,into the inversion of dispersion curves to enhance inversion performance.In noiseless theoretical models,the OOA demonstrates excellent inversion accuracy and stability,accurately recovering model parameters.Even in noisy models,OOA maintains robust performance,achieving high inversion precision under high-noise conditions.In multimode dispersion curve tests,OOA effectively handles higher modes due to its efficient global and local search capabilities,and the inversion results show high consistency with theoretical values.Field data from the Wyoming region in the United States and a landfill site in Italy further verify the practical applicability of the OOA.Comprehensive test results indicate that the OOA outperforms the Particle Swarm Optimization(PSO)algorithm,providing a highly accurate and reliable inversion strategy for dispersion curve inversion.展开更多
<em></em><em></em>Osprey is a type of bird of prey that lives almost all over the world. In Japan, it is designated as a near-threatened species because it has less than 1000 individuals. In re...<em></em><em></em>Osprey is a type of bird of prey that lives almost all over the world. In Japan, it is designated as a near-threatened species because it has less than 1000 individuals. In recent years, it inhabits more inland than in coastal areas. In this study, we conducted a population genetic analysis focusing on what kind of genetic structure Japanese Osprey retains and whether there are differences between coastal and inland populations. We also performed genetic diversity assessments. We sequenced<span style="font-family:;" "=""> </span><span style="font-family:;" "="">about 2.3 kb of mtDNA for 27 individuals in Japan, and phylogenetic analysis, network analysis, neutrality test and mismatch distribution analysis were performed. Eighteen haplotypes were detected in 27 individuals, indicating that genetic diversity was sufficiently high. Both unique and common haplotypes were detected between inland and coastal populations, suggesting gene flow between the two populations. Phylogenetic analysis results show no genetic differentiation in the Japanese Osprey population. From the results of network analysis, neutrality test and mismatch distribution analysis, it was inferred that the Japanese Osprey had a population expansion in the past. This study indicated that the dispersion of Japanese Osprey was random and there were no restrictions on the breeding area. The information presented here can be used towards implementing future conservation actions.</span>展开更多
基金sponsored by China Geological Survey Project(DD20243193 and DD20230206508).
文摘In Rayleigh wave exploration,the inversion of dispersion curves is a crucial step for obtaining subsurface stratigraphic information,characterized by its multi-parameter and multi-extremum nature.Local optimization algorithms used in dispersion curve inversion are highly dependent on the initial model and are prone to being trapped in local optima,while classical global optimization algorithms often suffer from slow convergence and low solution accuracy.To address these issues,this study introduces the Osprey Optimization Algorithm(OOA),known for its strong global search and local exploitation capabilities,into the inversion of dispersion curves to enhance inversion performance.In noiseless theoretical models,the OOA demonstrates excellent inversion accuracy and stability,accurately recovering model parameters.Even in noisy models,OOA maintains robust performance,achieving high inversion precision under high-noise conditions.In multimode dispersion curve tests,OOA effectively handles higher modes due to its efficient global and local search capabilities,and the inversion results show high consistency with theoretical values.Field data from the Wyoming region in the United States and a landfill site in Italy further verify the practical applicability of the OOA.Comprehensive test results indicate that the OOA outperforms the Particle Swarm Optimization(PSO)algorithm,providing a highly accurate and reliable inversion strategy for dispersion curve inversion.
文摘<em></em><em></em>Osprey is a type of bird of prey that lives almost all over the world. In Japan, it is designated as a near-threatened species because it has less than 1000 individuals. In recent years, it inhabits more inland than in coastal areas. In this study, we conducted a population genetic analysis focusing on what kind of genetic structure Japanese Osprey retains and whether there are differences between coastal and inland populations. We also performed genetic diversity assessments. We sequenced<span style="font-family:;" "=""> </span><span style="font-family:;" "="">about 2.3 kb of mtDNA for 27 individuals in Japan, and phylogenetic analysis, network analysis, neutrality test and mismatch distribution analysis were performed. Eighteen haplotypes were detected in 27 individuals, indicating that genetic diversity was sufficiently high. Both unique and common haplotypes were detected between inland and coastal populations, suggesting gene flow between the two populations. Phylogenetic analysis results show no genetic differentiation in the Japanese Osprey population. From the results of network analysis, neutrality test and mismatch distribution analysis, it was inferred that the Japanese Osprey had a population expansion in the past. This study indicated that the dispersion of Japanese Osprey was random and there were no restrictions on the breeding area. The information presented here can be used towards implementing future conservation actions.</span>
