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刘强 讲师（高校）
  • 入职时间：2023-10-09
  • 学历：博士研究生毕业
  • 学位：工学博士学位
  • 性别：男
  • 在职信息：在岗
  • 主要任职：助理教授
  • 毕业院校：哈尔滨工业大学
  • 所在单位：城市轨道交通学院（智慧城市与交通学院）
  • 学科：防灾减灾工程及防护工程
    地质工程
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  • 发表刊物：Catena
  • 关键字：Landslide susceptibility; Fluctuation characteristics; Learning opportunity; Underestimation
  • 摘要：Identifying the uncertainty caused by the number of non-landslides is necessary to obtain a precise landslide susceptibility map. Hence, the objective of this study is to investigate the evolution of landslide susceptibility under different numbers of non-landslides, and thus to answer the question of how many non-landslides are required for susceptibility modeling. For this purpose, Heilongjiang province was selected as the study area to build the landslide inventory, and the number of non-landslides at different ratios to landslides was set. Later, 12 conditioning factors were constructed and applied to the susceptibility model. Finally, the susceptibility uncertainty was ascertained via fluctuations in sample prediction, variations in classifier performance, and changes in the susceptibility map. Results show that the fluctuation in landslide prediction grows, while that for nonlandslides decreases, as the number of non-landslides increases. Quantitatively, the sensitivity is 0.93 at 0.5/ 1, followed by 0.90 at 1/1, 0.87 at 2/1, 0.72 at 5/1, and 0.61 at 10/1; the specificity is 0.86 at 0.5/1, followed by 0.90 at 1/1, 0.92 at 2/1, 0.97 at 5/1, and 0.99 at 10/1; while the accuracy is 0.91 at 0.5/1, followed by 0.90 at 1/ 1, 0.89 at 2/1, 0.84 at 5/1, and 0.96 at 10/1, in the training phase. Also, the predictive ability of samples shows similar trends, in the test phase. Besides, the area with high susceptibility gradually shrinks with increasing nonlandslides, and the R-value reaches the top, 2.92, at the equilibrium state. This study provides an in-depth understanding to emphasize the balanced value for non-landslides when applying the idea of presence-absence.
  • 第一作者：Qiang Liu et al
  • 论文类型：SCI
  • 卷号：227
  • ISSN号：107109
  • 是否译文：否
  • 发表时间：2023-04-06
  • 收录刊物：SCI

  • 附件： Exploring the uncertainty of landslide susceptibility caused by the number of nonlandslides.pdf

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