[3] [3] Liu K, Zhao D, Fang J Y, et al. Journal of the Indian Society of Remote Sensing, 2017, 45(5)：805.

[5] [5] Han L, Chen R, Zhu H, et al. Sustainability, 2020, 12(4), 1476.

[6] [6] Liu Z, Lu Y, Peng Y, et al. Remote Sensing, 2019, 11(12), 1464.

[8] [8] Tan K, Ma W, Chen L, et al. Journal of Hazardous Materials, 2021, 401: 123288.

[9] [9] Tian S Q, Wang S J, Bai X Y, et al. Chinese Journal of Geochemistry, 2020, 39(3): 423.

[14] [14] Yang C, Tan Y L, Bruzzone L, et al. Remote Sensing, 2017, 9：782.

[15] [15] Zhang X, Yang G, Yang Y, et al. Proc SPIE, 2016, 10156: 1015605.

[20] [20] Kennedy J, Eberhart R. A Discrete Binary Version of the Particle Swarm Algorithm. International Conference on Systems, Man, and Cybernetics. Computational Cybernetics and Simulation, 1997, 5：4104.

[23] [23] Wang L, Zhou X D, Zhu X K, et al. The Crop Journal, 2016, 4(3)：212.

[25] [25] Breiman L. Machine Learning, 2001, 45(1)：5.

[26] [26] Rodriguez-Galiano V, Mendes M P, Garcia-Soldado M J, et al. Science of the Total Environment, 2014, 476-477：189.

[30] [30] Cao Y, Ye Y T, Zhao H L, et al. Ecological Informatics, 2018, 44：21.