Full
PANG Cong, engineer, majors in artificial intelligence seismology and software development, E-mail: ponspc@foxmail.com
Outline
Aiming at the problems of wireless node seismometer can not be accurately located and may be lost in the field under complex exploration environment, the study of UHF RFID high-precision ranging and positioning is of great significance. Firstly, we use the received signal strength indicator(RSSI) approximation calculation formula to sieve out the sampling values with large errors. Then, two optimization objective functions of the third-generation non-dominated sorting genetic algorithm(NSGA-Ⅲ) are designed, whose independent variables are one-dimensional convolutional neural network(1D-CNN) hyper-parameters, such as learning rate decreasing factor, initial learning rate, and batch size, and whose dependent variables are determination coefficient(R2) and mean bias error(MBE) of network prediction and theoretical values. Finally, the best hyperparameter values are used to form a new model of NSGAⅢ-1D-CNN, which is designed to improve the stability and accuracy of RFID ranging model. The prediction experiments show that the new model has a small prediction error of node seismometer RFID ranging under 100 rounds of cyclic experiments, and its performance is excellent in several indexes, such as R2, root mean square error(RMSE), mean absolute error(MAE), MBE, with the mean values of 0.977 9, 0.058 6 m, 0.047 2 m, -0.001 3 m, respectively, which has higher ranging and positioning accuracy compared with other models. The new model has certain application value in field physical exploration.
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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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