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学者姓名：张化进
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Abstract ：
为对边坡稳定性进行广义高效地准确判断,引入了一种新型的CatBoost集成学习算法评价边坡稳定性.根据边坡基本几何与地质要素,无需数值建模与计算,直接客观地评判边坡稳定性状态,并从概率信息论角度给出边坡稳定性概率,实现速度快、精度高、稳健性好的广域尺度下边坡稳定性评价.以影响边坡稳定性的5个主要因素作为评价指标,创造了大型边坡稳定性评价数据集,据此构建了基于CatBoost集成学习的边坡稳定性预测模型.仿真结果表明,对比常见机器学习和代表性集成学习模型,CatBoost模型预测效果明显优于其他模型,且减少了超参数调优需求,更具有通用性、客观性和可靠性,可有效应用于边坡稳定性初步评价.通过举例仁化(湘粤界)至博罗高速公路仁化至新丰段某边坡工程,验证了基于CatBoost集成学习的边坡稳定性评价方法的可行性.
Keyword ：
CatBoost CatBoost 机器学习 机器学习 稳定性预测 稳定性预测 边坡 边坡 集成学习 集成学习
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| GB/T 7714 | 谭勇 , 陈记 , 杨忠民 et al. 基于CatBoost集成学习的边坡稳定性预测方法 [J]. | 科学技术与工程 , 2024 , 24 (30) : 13153-13160 . |
| MLA | 谭勇 et al. "基于CatBoost集成学习的边坡稳定性预测方法" . | 科学技术与工程 24 . 30 (2024) : 13153-13160 . |
| APA | 谭勇 , 陈记 , 杨忠民 , 张化进 . 基于CatBoost集成学习的边坡稳定性预测方法 . | 科学技术与工程 , 2024 , 24 (30) , 13153-13160 . |
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Abstract ：
针对边坡稳定性预测算法选择困难和单个模型误判风险大的问题,建立了基于改进D-S证据理论选择性集成的边坡稳定性评价方法,为边坡稳定性初步评价提供方法依据.基于边坡稳定性主要影响因素,通过极限平衡法构建了大型边坡稳定性评价数据集.引入基于边界距离最小化的基学习器选择技术,提升选择性集成模型的泛化能力.提出了改进D-S证据理论融合基学习器信息,降低了选择性集成模型决策过程中的不确定性和模糊性,解决了现有边坡稳定性评价模型易误判和结果非一致性问题.仿真试验结果表明:改进D-S证据理论选择性集成方法无需复杂的数值建模与计算迭代过程,可直接客观地评判边坡稳定性状态,并从信息论角度给出边坡失稳概率.对比传统机器学习方法,该方法有效提高了边坡稳定性的预测准确率,同时降低了预测结果的不确定性,实现了速度快、精度高、稳健性好的广域尺度边坡稳定性评价.
Keyword ：
D-S证据理论 D-S证据理论 失稳概率 失稳概率 边坡稳定性 边坡稳定性 选择性集成 选择性集成 集成学习 集成学习
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| GB/T 7714 | 张化进 , 吴顺川 , 李兵磊 . 基于改进D-S证据理论选择性集成的边坡稳定性评价 [J]. | 金属矿山 , 2024 , (9) : 229-236 . |
| MLA | 张化进 et al. "基于改进D-S证据理论选择性集成的边坡稳定性评价" . | 金属矿山 9 (2024) : 229-236 . |
| APA | 张化进 , 吴顺川 , 李兵磊 . 基于改进D-S证据理论选择性集成的边坡稳定性评价 . | 金属矿山 , 2024 , (9) , 229-236 . |
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Abstract ：
In this study, a group of experiments using true triaxial stress conditions with free face loading are performed on granite specimens with non-penetrating double flaws. The crack development and failure characteristics of these specimens are explored by integrating video of the free face and acoustic emission technology, with the combination of the four different intermediate principal stresses and three different grain sizes of the granite chosen as variables. First, surface flaws with a depth of 50 mm are found to have limited influence on the specimen's failure mode. The intermediate principal stress has a greater effect as it inhibits the development of surface cracks; however, surface cracks develop much more readily in coarse-grained specimens than in other specimens. Second, when the intermediate principal stress exceeds 10 MPa, the rock burst failure phenomenon occurs in the specimen. Third, irrespective of changes in the intermediate principal stress and granite specimen grain size, the specimens primarily fail by tensile-shear failure and shear failure. Extending inward from the free face in the sigma 3 direction, according to the failure types, the failure types can be classified into tensile failure, shear failure, and tensile-shear failure. Finally, using the stress state synthesis method, the specimen's stress state and crack distribution mechanism on the sigma 2 loading plane are analyzed.
Keyword ：
Acoustic emission Acoustic emission Crack damage Crack damage Granite grain size Granite grain size Intermediate principal stress effect Intermediate principal stress effect Non -penetrating flaw Non -penetrating flaw
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| GB/T 7714 | Li, Binglei , Shi, Wenhao , Zhang, Huajin et al. Failure behaviors and acoustic emission characteristics of flawed granite of different grain sizes: Insights from true triaxial experiments with a free face [J]. | THEORETICAL AND APPLIED FRACTURE MECHANICS , 2024 , 131 . |
| MLA | Li, Binglei et al. "Failure behaviors and acoustic emission characteristics of flawed granite of different grain sizes: Insights from true triaxial experiments with a free face" . | THEORETICAL AND APPLIED FRACTURE MECHANICS 131 (2024) . |
| APA | Li, Binglei , Shi, Wenhao , Zhang, Huajin , Long, Yi . Failure behaviors and acoustic emission characteristics of flawed granite of different grain sizes: Insights from true triaxial experiments with a free face . | THEORETICAL AND APPLIED FRACTURE MECHANICS , 2024 , 131 . |
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Abstract ：
To reasonably and effectively evaluate the stability of jointed rock slopes, this study proposes a reliability analysis method that considers the uncertainty of the joint spatial distribution. First, the discrete fracture network (DFN) model is used to characterize the variability of joint geometric parameters, and a random variable of joint location is assumed to be a random integer that follows a uniform distribution in the random number library. Then, Latin hypercube sampling is used to sample uncertain random variables to generate random numbers, and construct the corresponding DFN model. Finally, the safety factor (Fs) of each numerical model under sampling is calculated by strength reduction method, and the failure probability of jointed rock slope is obtained by statistical analysis of Fs. The comparative analysis results demonstrate that considering the uncer-tainty of joint spatial distribution is crucial for accurately analyzing the reliability of rock slopes. This method comprehensively considers the main internal factors that affect the reliability of jointed rock slopes, including the uncertainty of rock strength parameters and variability of geometrical parameter and the location randomness of joints, making the results of the evaluation of the reliability of rock slopes more precise and reasonable.
Keyword ：
Discontinuities Discontinuities Joint location randomness Joint location randomness Reliability analysis Reliability analysis Rock slope Rock slope Spatial uncertainty Spatial uncertainty
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| GB/T 7714 | Zhang, Huajin , Wu, Shunchuan , Zhang, Zhongxin et al. Reliability analysis of rock slopes considering the uncertainty of joint spatial distributions [J]. | COMPUTERS AND GEOTECHNICS , 2023 , 161 . |
| MLA | Zhang, Huajin et al. "Reliability analysis of rock slopes considering the uncertainty of joint spatial distributions" . | COMPUTERS AND GEOTECHNICS 161 (2023) . |
| APA | Zhang, Huajin , Wu, Shunchuan , Zhang, Zhongxin , Huang, Shigui . Reliability analysis of rock slopes considering the uncertainty of joint spatial distributions . | COMPUTERS AND GEOTECHNICS , 2023 , 161 . |
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