Full
ZHANG Yuntao, assistant engineer, majors in seismic tomography, E-mail: 714630079@qq.com
Outline
We use the joint tomography of first-arrival and reflected waves based on the adjoint techniques and conventional optimization methods to compare the combination methods of three commonly used optimization methods (CG, CGDESCENT, L-BFGS) and line search methods (LNS and CWI), and test the six combination algorithms using anomaly body model and chessboard model. The results show that: 1) For high-speed mutation models, CGDESCENT+LNS has slightly higher accuracy than L-BFGS+CWI, but CGDESCENT did not converge in low-speed models, while both L-BFGS+LNS and L-BFGS+CWI perform well. CGDESCENT is more suitable for large-scale models. 2) Under the same conditions, the accuracy of CWI is slightly higher than that of LNS, but CWI is prone to local minimum and is very unstable.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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