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学者姓名:王浩
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As a geological disaster widely distributed in the southern regions of China, rainfall-induced shallow landslides pose a significant threat to affected areas. Timely detection of landslides is crucial in the effective response to such disasters. However, landslide detection faces adverse impacts from various factors, such as insufficient sample data, complex model structures, and limitations in detection accuracy during the actual detection process. In this study, high-quality image samples were collected from multiple landslide disaster areas in southern China, and a rainfall-induced shallow landslide sample database was constructed in the region. Based on this, a lightweight attention-guided YOLO model (LA-YOLO) was proposed to improve the detection performance of YOLO model for rainfall-induced shallow landslides. First, CG block is introduced to enhance the C2f module, enriching the feature representation capability through multiscale feature fusion and reducing the model's parameters and computational complexity. Second, the SimAM attention module is used to focus on the target regions, improving feature extraction effectiveness. Experimental results show that the model parameters of LA-YOLO were reduced by approximately 30%, with precision, recall, and mean average precision (mAP) on the landslide sample dataset increasing by 2.6%, 0.7%, and 2.2%, respectively. While ensuring model detection performance, the model structure was significantly optimized, achieving both lightweight and accuracy goals, confirming the model's superiority in monitoring rainfall-induced shallow landslide disasters.
Keyword :
Accuracy Accuracy Attention mechanism Attention mechanism Biological system modeling Biological system modeling context guidance module context guidance module Data models Data models Disasters Disasters Feature extraction Feature extraction landslide detection landslide detection Neurons Neurons Rain Rain rainfall-induced shallow landslide rainfall-induced shallow landslide Terrain factors Terrain factors Training Training YOLO YOLO YOLO v8 YOLO v8
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GB/T 7714 | Wang, Lin , Lei, Henggang , Jian, Wenbin et al. Enhancing Landslide Detection: A Novel LA-YOLO Model for Rainfall-Induced Shallow Landslides [J]. | IEEE GEOSCIENCE AND REMOTE SENSING LETTERS , 2025 , 22 . |
MLA | Wang, Lin et al. "Enhancing Landslide Detection: A Novel LA-YOLO Model for Rainfall-Induced Shallow Landslides" . | IEEE GEOSCIENCE AND REMOTE SENSING LETTERS 22 (2025) . |
APA | Wang, Lin , Lei, Henggang , Jian, Wenbin , Wang, Wenjia , Wang, Hao , Wei, Nan . Enhancing Landslide Detection: A Novel LA-YOLO Model for Rainfall-Induced Shallow Landslides . | IEEE GEOSCIENCE AND REMOTE SENSING LETTERS , 2025 , 22 . |
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Rainfall-induced landslides are widely distributed in many countries. Rainfall impacts the hydraulic dynamics of groundwater and, therefore, slope stability. We derive an analytical solution of slope stability considering effective rainfall based on the Richards equation. We define effective rainfall as the total volume of rainfall stored within a given range of the unsaturated zone during rainfall events. The slope stability at the depth of interest is provided as a function of effective rainfall. The validity of analytical solutions of system states related to effective rainfall, for infinite slopes of a granite residual soil, is verified by comparing them with the corresponding numerical solutions. Additionally, three approaches to global sensitivity analysis are used to compute the sensitivity of the slope stability to a variety of factors of interest. These factors are the reciprocal of the air-entry value of the soil alpha, the thickness of the unsaturated zone L, the cohesion of soil c, the internal friction angle phi related to the effective normal stress, the slope angle beta, the unit weights of soil particles gamma(s), and the saturated hydraulic conductivity K-s. The results show the following: (1) The analytical solutions are accurate in terms of the relative differences between the analytical and the numerical solutions, which are within 5.00% when considering the latter as references. (2) The temporal evolutions of the shear strength of soil can be sequentially characterized as four periods: (i) strength improvement due to the increasing weight of soil caused by rainfall infiltration, (ii) strength reduction controlled by the increasing pore water pressure, (iii) strength reduction due to the effect of hydrostatic pressure in the transient saturation zone, and (iv) stable strength when all the soil is saturated. (3) The large alpha corresponds to high effective rainfall. (4) The factors ranked in descending order of sensitivity are as follows: alpha > L > c > beta > gamma(s) > K-s > phi.
Keyword :
analytic solution analytic solution effective rainfall effective rainfall global sensitivity analysis global sensitivity analysis shear strength shear strength slope stability slope stability
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GB/T 7714 | Xia, Chuan-An , Zhang, Jing-Quan , Wang, Hao et al. Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions [J]. | WATER , 2025 , 17 (2) . |
MLA | Xia, Chuan-An et al. "Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions" . | WATER 17 . 2 (2025) . |
APA | Xia, Chuan-An , Zhang, Jing-Quan , Wang, Hao , Jian, Wen-Bin . Global Sensitivity Analysis of Slope Stability Considering Effective Rainfall with Analytical Solutions . | WATER , 2025 , 17 (2) . |
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We develop a reduced-order modeling strategy aimed at providing numerical Monte Carlo simulations of groundwater flow in randomly heterogeneous transmissivity fields. We rely on moment equations for groundwater flow and conduct space reductions for both transmissivity, T , and hydraulic head, h . A truncated singular value decomposition (SVD) solver is employed to cope with the ill-conditioned stiffness matrix caused by (negative and thus) unphysical values of T that might arise due to possible low accuracy stemming from the order of model reduction. The performance of the approach is assessed through the analysis of various synthetic reference scenarios. These encompass diverse degrees of heterogeneity of the transmissivity field and various values of reduced-order dimensions, n and m , associated with h and T , respectively. Transmissivity is conceptualized as a composite (spatial) random field where there is uncertainty in the locations of regions associated with diverse geomaterials as well as in the heterogeneity of transmissivity therein. Our results are also compared against their counterparts that one could obtain upon performing a model reduction solely on the basis of hydraulic heads. Our findings show that: (i) resting on the truncated SVD solver is beneficial for coping with ill- conditioned stiffness matrices; (ii) the two model reduction strategies provide comparable solution accuracy for m >= 5n, while (iii) the computational cost associated with the reduced-order model based on space reduction for both T and h is always significantly smaller than that associated with space reduction based solely on h .
Keyword :
Groundwater Groundwater Moment equations Moment equations Monte Carlo simulation Monte Carlo simulation Reduced-order model Reduced-order model Truncated singular value decomposition Truncated singular value decomposition
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GB/T 7714 | Xia, Chuan-An , Wang, Hao , Jian, Wenbin et al. Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields [J]. | JOURNAL OF HYDROLOGY , 2025 , 651 . |
MLA | Xia, Chuan-An et al. "Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields" . | JOURNAL OF HYDROLOGY 651 (2025) . |
APA | Xia, Chuan-An , Wang, Hao , Jian, Wenbin , Riva, Monica , Guadagnini, Alberto . Reduced-order Monte Carlo simulation framework for groundwater flow in randomly heterogeneous composite transmissivity fields . | JOURNAL OF HYDROLOGY , 2025 , 651 . |
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风化土作为花岗岩二元结构边坡的主要物源,厘清其内部侵蚀特性是开展该类边坡破坏模式与促滑机理研究的基础.地下水渗流作用下花岗岩风化土的内部侵蚀包括细颗粒迁移、淤塞等过程,本文设计制作侧向渗透模型,开展不同动水头与坡度条件下花岗岩风化土的侧向渗流试验,并结合精细化数值模拟研究内部侵蚀发展特征与细颗粒的运移规律.结果表明:花岗岩风化土的内部侵蚀是渐进发展的过程,倾斜角度越陡、水头变化幅度越大,则土体内部侵蚀越强烈,细颗粒的流失量就越大;风化土流失的细颗粒与软弱带土层的矿物组分基本一致,表明差异风化界面的软弱带是渗流作用下花岗岩风化土中细颗粒迁移沉积形成;细颗粒迁移导致的土体颗粒粗化、细颗粒沉积导致的基覆界面软化是花岗岩二元结构边坡失稳的主要原因.厘清花岗岩风化土内部侵蚀的作用机制,研究结果可为花岗岩边坡失稳预测与防灾减灾提供理论依据.
Keyword :
内部侵蚀 内部侵蚀 动水头 动水头 模型试验 模型试验 花岗岩风化土 花岗岩风化土
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GB/T 7714 | 王浩 , 严耿明 , 李传东 et al. 动水头作用下花岗岩风化土内部侵蚀试验研究 [J]. | 工程科学与技术 , 2025 , 57 (1) : 132-144 . |
MLA | 王浩 et al. "动水头作用下花岗岩风化土内部侵蚀试验研究" . | 工程科学与技术 57 . 1 (2025) : 132-144 . |
APA | 王浩 , 严耿明 , 李传东 , 黄瑛瑛 , 张智超 . 动水头作用下花岗岩风化土内部侵蚀试验研究 . | 工程科学与技术 , 2025 , 57 (1) , 132-144 . |
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Polymer material (PM) is a novel vertical barrier material, demonstrated to be effective in impeding pollutants. However, the associated transport research is limited. This study aims to develop an analytical solution for twodimensional transport of organic contaminant in the PM-enhanced composite cutoff wall (CCW) system, where the variable substitution and Fourier transform methods are used. This analytical solution, available in various simplifications, is effectively validated via several comparisons. Following this, the analyses show that an increase in the non-uniformity of pollution source concentration distribution shortens the PM-enhanced CCW's breakthrough time (tb), while exhibits a marginal effect on the total flux at its exit. The increment of aquifer horizontal thickness prolongs the tb to some extent, whereas an increase in its hydraulic conductivity slightly reduces the tb. Additionally, the PM layer location is found to have a little effect on the PM-enhanced CCW's barrier performance. Furthermore, the equivalent performance assessment reveals that the improvement gained from increasing the PM layer thickness far surpasses that from increasing the single-layered cutoff wall thickness, and this difference may exceed 10. For a PM layer with low hydraulic conductivity, it is more suitable for engineering scenarios with the higher hydraulic head difference. Totally, the proposed analytical solution offers a valuable tool for designing the PM-enhanced CCW.
Keyword :
Analytical solution Analytical solution Composite cutoff wall Composite cutoff wall Performance assessment Performance assessment Polymer material Polymer material Transport analyses Transport analyses Two-dimensional transport Two-dimensional transport
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GB/T 7714 | Jiang, Wenhao , Wang, Hao , Cao, Linfeng . Analytical study for two-dimensional transport of organic contaminant in a polymer material-enhanced composite cutoff wall system [J]. | JOURNAL OF CONTAMINANT HYDROLOGY , 2025 , 269 . |
MLA | Jiang, Wenhao et al. "Analytical study for two-dimensional transport of organic contaminant in a polymer material-enhanced composite cutoff wall system" . | JOURNAL OF CONTAMINANT HYDROLOGY 269 (2025) . |
APA | Jiang, Wenhao , Wang, Hao , Cao, Linfeng . Analytical study for two-dimensional transport of organic contaminant in a polymer material-enhanced composite cutoff wall system . | JOURNAL OF CONTAMINANT HYDROLOGY , 2025 , 269 . |
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Large flume model tests were conducted to investigate the effects of vegetation on water infiltration and slope deformation under wetting-drying cycles. In total, two flume model tests were carried out, one was planted with Schefflera heptaphylla, and the other bare slope severed as a reference. Plant characteristics, volumetric water content, matric suction, and surface runoff were well documented. Simultaneously, slope deformation during rainfall was analyzed by Particle Image Velocimetry (PIV) technology. The experimental results showed that the growth rate of plant height increased as light intensity increased. At the initial stages, suctions in the shallow soil layers (i.e. 50 mm) of the vegetated slope were smaller than that of the bare slope. However, the suction in the vegetated slope increased as light intensity increased, particularly in the shallow layer (i.e. 150 mm), where it was about 10 kPa larger than that of the bare slope. In addition, vegetation improved the rainfall infiltration rate, which increased with the number of wetting-drying cycles. Under the same condition, the cumulative rainfall infiltration rate of the vegetated slope was approximately twice that of the bare slope. While, the horizontal and vertical deformation rates of the vegetated slope were lower than those of bare slope, respectively. This indicates that vegetation effectively mitigates slope deformation during extreme rainfall and enhances slope stability.
Keyword :
Deformation Deformation Infiltration rate Infiltration rate Vegetated slope Vegetated slope Wetting-drying cycles Wetting-drying cycles
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GB/T 7714 | Liu, Hong Wei , Wang, Yu Xin , Huang, Yun et al. Effects of vegetation on hydraulic responses and slope deformation under wetting-drying cycles [J]. | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2025 , 84 (6) . |
MLA | Liu, Hong Wei et al. "Effects of vegetation on hydraulic responses and slope deformation under wetting-drying cycles" . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 84 . 6 (2025) . |
APA | Liu, Hong Wei , Wang, Yu Xin , Huang, Yun , Fan, Xiu Feng , Wang, Hao . Effects of vegetation on hydraulic responses and slope deformation under wetting-drying cycles . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2025 , 84 (6) . |
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Although the root can enhance the soil's strength, vegetation cover landslide still occurs frequently under the rainfall. To elucidate the mechanism underlying the degradation of the shear strength of root-soil composites under the influence of moisture, we investigated trees from hilly slopes in southeastern China. The tensile mechanical properties of roots were tested under varying moisture conditions.The results of previous work on the friction characteristics of the root-soil interface under different soil water content were also considered. Furthermore, large-scale direct shear tests were performed to assess the strength characteristics of root-soil composites under different root cross-sectional area ratios (RAR) and moisture contents. Based on the widely used Wu model, and incorporating the failure modes of roots in root-soil composites and the mechanism of root-soil interface friction, a root-soil composite strength degradation model was established considering the effects of moisture. Moisture significantly affected the tensile strength of fine tree roots, with the tensile strength of fine roots being lower in the saturated state than in the fresh state. In contrast, coarse roots were almost unaffected by moisture. As the moisture content increased, the additional strength provided by the roots decreased, and the root efficiency (REp) decreased significantly. The model was validated against experimental data, and the calculated results were accurate. In root-soil composites, as moisture infiltrates, the tensile strength of the roots, soil shear strength, and root-soil interface shear strength decrease to different degrees. This results in reduced resistance to deformation in the root-soil composites, leading to a decrease in its strength.
Keyword :
Moisture content Moisture content Root reinforcement Root reinforcement Root-soil interface friction Root-soil interface friction Root tensile strength Root tensile strength Strength degradation model Strength degradation model
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GB/T 7714 | Lin, Yunzhao , Jian, Wenbin , Wu, Yilong et al. Degradation of the mechanical properties of root-soil composites under moisture influence [J]. | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2025 , 84 (3) . |
MLA | Lin, Yunzhao et al. "Degradation of the mechanical properties of root-soil composites under moisture influence" . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 84 . 3 (2025) . |
APA | Lin, Yunzhao , Jian, Wenbin , Wu, Yilong , Zhu, Zuteng , Wang, Hao , Dou, Hongqiang et al. Degradation of the mechanical properties of root-soil composites under moisture influence . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2025 , 84 (3) . |
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基于相关性的局域化集合数据同化方法适用于观测信息与反演参数之间不存在物理距离时的情形,但参数的反演精度受阻滞作用影响.为了厘清相关性阻滞作用对局域化迭代集合平滑估计渗透系数的影响,本文采用不同的集合大小N,相关系数(包括Pearson,Kendall和Spearman)、和阻滞函数(包括12种函数)构建局域化迭代平滑方法用于估计二维孔隙承压含水层的渗透系数场.研究结果显示:(1)使用Pearson相关系数得到的渗透系数反演精度最高,其次为Spearman;(2)当考虑椭圆方程分别与Gaspari-Cohn,双曲正切函数和指数函数组合的复合函数作为阻滞函数时,局域化效果总体优于其他组合的阻滞函数.本文提出的相关性局域化迭代集合平滑方法框架和研究结果可为水文地质参数估计的研究与应用提供重要的参考.
Keyword :
相关性局域化 相关性局域化 相关系数 相关系数 迭代集合平滑 迭代集合平滑 阻滞函数 阻滞函数
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GB/T 7714 | 夏传安 , 高欣宇 , 王浩 et al. 相关性阻滞作用对局域化迭代集合平滑估计渗透系数的影响 [J]. | 工程地质学报 , 2025 , 33 (2) : 733-743 . |
MLA | 夏传安 et al. "相关性阻滞作用对局域化迭代集合平滑估计渗透系数的影响" . | 工程地质学报 33 . 2 (2025) : 733-743 . |
APA | 夏传安 , 高欣宇 , 王浩 , 简文彬 . 相关性阻滞作用对局域化迭代集合平滑估计渗透系数的影响 . | 工程地质学报 , 2025 , 33 (2) , 733-743 . |
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Due to rainfall, the soil-rock differential weathering interface of spherical weathered granite soil slopes is prone to evolve into a dominant seepage channel and undergo seepage suffosion, which accelerates the deformation and instability of these slopes. However, little research has been carried out on the characteristics of seepage suffosion and the migration of fine particles. Based on the unsaturated seepage theory of porous media, a numerical calculation framework is established to accurately describe the seepage suffosion process at the soil-rock interface, considering the coupling relationship between the fine particle migration, suffosion initiation response and unsaturated seepage. The finite element method is used to construct a seepage suffosion model for unsaturated granite residual soil under the effect of dominant flow. Based on the seepage suffosion process of homogeneous soil columns, the suffosion characteristics of dominant flow under three typical soil-rock interface burial states are systematically investigated. The results show that the soil-rock interface and the matrix permeability of spherical weathered granite soil slopes are highly variable, with the wetting front forming a downward depression infiltration funnel, and the degree of depression of the wetting front becomes more pronounced as rainfall continues. The degree of fine particle loss is related to the burial state of the soil-rock interface, in which the dominant flow potential suffosion of the under-filled soil condition is the most significant, and even excess pore water pressure occurs at the interface, which is the most unfavorable to the stability of this type of slope. The research results can provide a scientific basis for accurately evaluating the stability of spherical weathered granite soil slopes under rainfall conditions. © 2024 Biodiversity Research Center Academia Sinica. All rights reserved.
Keyword :
Biodiversity Biodiversity Finite element method Finite element method Groundwater flow Groundwater flow Interface states Interface states Porous materials Porous materials Rain Rain Seepage Seepage Slope stability Slope stability Soils Soils Spheres Spheres Wetting Wetting
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GB/T 7714 | Hong-Qiang, Dou , Sen-Hua, Xie , Wen-Bin, Jian et al. Characteristics of preferential flow suffosion of soil-rock interface in spherical weathered granite slopes [J]. | Rock and Soil Mechanics , 2024 , 45 (4) : 950-960 . |
MLA | Hong-Qiang, Dou et al. "Characteristics of preferential flow suffosion of soil-rock interface in spherical weathered granite slopes" . | Rock and Soil Mechanics 45 . 4 (2024) : 950-960 . |
APA | Hong-Qiang, Dou , Sen-Hua, Xie , Wen-Bin, Jian , Hao, Wang , Chao-Xu, Guo . Characteristics of preferential flow suffosion of soil-rock interface in spherical weathered granite slopes . | Rock and Soil Mechanics , 2024 , 45 (4) , 950-960 . |
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变密度地下水流系统受水力梯度和密度梯度共同驱动,非线性强,数值模型计算量大,尤其在开展不确定性分析时需要的计算成本很高。常规的数据驱动机器学习方法只能对点监测信息进行模拟分析,不能模拟整个地下水流系统。本研究发展了变密度地下水流降阶模型,利用高斯过程模型对降阶模型的数值误差进行修正组成耦合模型。耦合模型既能克服高斯过程只能模拟有限监测点信息的缺陷,又能提高降阶模型对监测点信息的模拟精度。考虑二维剖面变密度地下水流案例,将渗透系数场设定为空间随机变量,采用基于全阶模型(FSMC)、降阶模型(ROMC)和耦合模型(GP-ROMC)3种蒙特卡罗模拟方法进行不确定分析。研究结果表明:(1)ROMC能替代FSMC开展不确定性分析;(2)水头和盐度的平均相对二范误差与降阶模型维度的关系可用指数函数描述(决定性系数R2≥0.99);(3)GP-ROMC对监测点信息的模拟精度比ROMC高,GP-ROMC可有效修正降阶模型误差提高蒙特卡罗模拟的精度。研究成果可为地下水建模、不确定性分析、风险评估及参数反演等工作提供重要技术支撑。
Keyword :
变密度地下水流 变密度地下水流 地下水 地下水 蒙特卡罗模拟 蒙特卡罗模拟 降阶模型 降阶模型 高斯过程 高斯过程
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GB/T 7714 | 夏传安 , 樊秀峰 , 王浩 et al. 耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟 [J]. | 水文地质工程地质 , 2024 , 51 (5) : 1-13 . |
MLA | 夏传安 et al. "耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟" . | 水文地质工程地质 51 . 5 (2024) : 1-13 . |
APA | 夏传安 , 樊秀峰 , 王浩 , 简文彬 . 耦合变密度地下水流降阶模型与高斯过程的蒙特卡罗模拟 . | 水文地质工程地质 , 2024 , 51 (5) , 1-13 . |
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