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Harnessing Distributed Deep Learning for Landslide Displacement Prediction: A Multi-Model Collaborative Approach Amidst Data Silos

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Journal of Earth Science 2024年第5期35卷 1770-1775页

作者： Bingchen li changdong li Yong liu Jie Tan Pengfei Feng Wenmin Yao Faculty of Engineering China University of Geosciences Badong National Observation and Research Station of Geohazards China University of Geosciences School of Mechanical Engineering and Electronic Information China University of Geosciences School of Civil Engineering Zhengzhou University

0 INTRODUCTION Timely and accurate prediction of landslide displacement is crucial for the early warning of landslide disasters(Tang et al., 2019; Zhao et al., 2019; Zhou et al., 2018). Among various landslide displacement prediction models, deep learning(DL) models have gained substantial popularity owing to their simplicity and accuracy(Feng et al., 2024; Dou et al., 2023; Huang et al., 2023, 2017; Wang et al., 2022).

关键词： landslide prediction Landslide

Upper-Bound limit Analysis of the Multi-Layer Slope Stability and Failure Mode Based on Generalized Horizontal Slice Method

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Journal of Earth Science 2024年第3期35卷 929-940页

作者： Huawei Zhang changdong li Wenqiang Chen Ni Xie Guihua Wang Wenmin Yao Xihui Jiang Jingjing Long Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources Changjiang River Scientific Research InstituteWuhan 430010China Faculty of Engineering China University of GeosciencesWuhan 430074China Badong National Observation and Research Station of Geohazards China University of GeosciencesWuhan 430074China School of Civil Engineering Zhengzhou UniversityZhengzhou 450001China

Multi-layer slopes are widely found in clay residue receiving fields.A generalized horizontal slice method(GHSM)for assessing the stability of multi-layer slopes that considers the energy dissipation between adjacent horizontal slices is *** view of the upper-bound limit analysis theory,the energy equation is derived and the ultimate failure mode is generated by comparing the sliding surface passing through the slope toe(mode A)with that below(mode B).In addition,the influence of the number of slices on the stability coefficients in the GHSM is studied and the stable value is *** to the original method(Chen’s method),the GHSM can acquire more precise results,which takes into account the energy dissipation in the inner sliding soil ***,the GHSM,limit equilibrium method(LEM)and numerical simulation method(NSM)are applied to analyze the stability of a multi-layer slope with different slope angles and the results of the safety factor and failure mode are very close in each *** ultimate failure modes are shown to be mode B when the slope angle is not more than 28°.It illustrates that the determination of the ultimate sliding surface requires comparison of multiple failure modes,not only mode A.

关键词： stability and failure mode slope stability generalized horizontal slice method upperbound limit analysis energy dissipation geotechnical engineering.

Estimation of Cation Exchangeable Capacity and External Specific Surface Area of Homoionic Montmorillonite from Water Adsorption Isotherms

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Journal of Earth Science 2024年

作者： Penglin Zheng Qingbing liu Jinge Wang changdong li Badong National Observation and Research Station of Geohazards (BNORSG)，China University of Geosciences (Wuhan)

This paper presents a method， based on Brunauer Emmett Teller (BET) theory， to estimate cation exchangeable capacity (CEC) and external specific surface area (SSAext) of homoionic montmorillonites using water adsorption isotherm. To this end， the dominant mechanism of water vapor adsorption by montmorillonite in different relative humidity (RH) range was firstly examined by analyzing the variation of basal spacing (d001) with RH， and the sequence of two hydration mechanisms， i.e.， cation hydration and surface hydration， were identified in terms of their relative contribution to interlayer expanding. On this basis， the BET model was applied to analyze water vapor adsorption isotherm and the variations of shapes of BET-plots for different homoionic montmorillonites was interpreted from the view of the dependency of hydration sequence on cation type. By linking BET curve with d001variation curve， an approach based on BET-plot to distinguish the boundary RH value between cation hydration and outer/interlayer surface hydration was proposed. With this approach， the definition of monolayer water content was reconsidered and a method to predict the CEC and SSAextwas developed. The validity of the proposed method was examined by comparing the predictions with experimental results. It is shown that， depending on interlayer cation type， the adsorption of water could initially occur either on cation or on external surfaces. This behavior， on one hand， allows for extending BET model to CEC prediction， and on the other hand， implies that the conventional way of calculating SSAextfrom straight-line BET plot， without considering the effect of cation types， may be inappropriate for montmorillonite-rich soil.

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Research Progress on Neuroprotective Effects of Salvianolic Acid B in an Animal Model of Parkinson's Disease

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Medicinal Plant 2024年第4期15卷 114-117页

作者： Jie ZHOU Tong ZHU changdong li Yaqiang NAN li CAO Department of Neurosurgery 940th Hospital of Joint Logistics Support ForceLanzhou 730050China

As an active ingredient extracted from Salvia miltiorrhiza,the neuroprotective effects of salvianolic acid B in Parkinson's disease include antioxidation,improvement of mitochondrial function,modulation of neuroinflammation,inhibition of apoptosis,promotion of neuronal differentiation and proliferation,and influence on intestinal *** an adjuvant drug,salbutamol B can be used in combination with conventional therapeutic drugs to enhance the efficacy and minimize the side effects,which provides a method and basis for the early diagnosis and treatment of Parkinson's disease in clinical practice.

关键词： Parkinson's disease Salvianolic acid B Neuroprotection Antioxidant Modulation of neuroinflammation Inhibition of apoptosis Improvement of mitochondrial function

Long-term in-situ monitoring of anchoring system and preliminary analysis of monitoring data

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Journal of Earth Science 2024年

作者： Luobin Zheng Huiming Tang liangqing Wang changdong li Chengren Xiong Zongxing Zou Chenlu Wang lingfeng Zhu Yifan Zhang Faculty of Engineering， China University of Geosciences Badong National Observation and Research Station of Geohazards，China University of Geosciences

The geological environment in which the reservoir slope is situated is intricate， influenced by factors such as precipitation and fluctuations in reservoir water levels. Furthermore， the anchoring structure embedded within the rock mass of the slope undergoes corrosion and deterioration due to these factors， resulting in a highly complex interaction process between the slope rock mass and the anchoring structure. The long-term safety of rock-anchored structure systems is closely tied to the construction and safe operation of reservoirs， as both internal and external factors play a role in ensuring their stability. The present study aims to investigate this intricate issue by designing and establishing an on-site comprehensive multi-field information monitoring platform. The multi-site information monitoring platform comprises three components， namely the landslide monitoring system， anchor structure monitoring system， and data management system. The landslide monitoring system encompasses the surveillance of surface deformation， subsurface deformation， and environmental factors. The monitoring system for anchor structures includes the monitoring of prestress， anchor cable strain， and corrosion status of steel bars. The establishment of a preliminary system for data transmission and management has been accomplished. The current monitoring results indicate that the health condition of the tested anchor cables is satisfactory， and the strain and corrosion status are influenced by the design of the anchor cable structure. The platform is currently undergoing enhancements with the incorporation of cutting-edge anchoring structure design and monitoring equipment.

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Effect of carboxymethyl cellulose on dissolution kinetics of carboxymethyl cellulose-sodium carbonate two-component tablet

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Chinese Journal of Chemical Engineering 2017年第10期25卷 1545-1550页

作者： changdong li Carlos Amador Yulong Ding Institute of Particle Science and Engineering University of Leeds Leeds UK School of Engineering University of Warwick. Coventry. CV4 7AL UK Procter & Gamble Newcastle-Upon-Tyne Innovation Centre Newcastle UK School of Chemical Engineering University of Birmingham Birmingham UK

Sodium carbonate and carboxymethyl cellulose powders are compressed into two-component tablets with three mass ratios,97%:3%,95%:5% and 93%:7%.The dissolution tests for two-component tablets and reference pure sodium carbonate tablets are carried out at various *** dissolution process of each tablet is measured by electrical conductivity tracking method and the concentration of dissolved sodium carbonate is quanti fied with calibrated conductivity-concentration converting equation of sodium *** quanti fied dissolution data is fitted with both surface reaction model and diffusion layer model and the results clearly show that surface reaction model is suggested as the appropriate dissolution model for all measured ***,it is determined that carboxymethyl cellulose is a stable element to remain the dissolution mechanism of tablet *** dissolution rate constant quanti fied with surface reaction model presents that carboxymethyl cellulose-sodium carbonate two-component tablets obtain signi ficant higher dissolution rate constant than pure sodium carbonate tablet and higher proportion of carboxymethyl cellulose leads to apparent higher dissolution rate *** results prove for the usage of carboxymethyl cellulose in most practical applications at a relative low-level,the effect of carboxymethyl cellulose is effective and positive for two-component tablet to enhance the dissolution process and improve dissolution rate constant and this effect is speculated coming from its dynamic physical transforming process in water including dilation and conglutination.

关键词： Carboxymethyl cellulose Sodium carbonate Electrical conductivity Temperature Surface reaction model Dissolution rate constant

An investigation on dissolution kinetics of single sodium carbonate particle with image analysis method

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Chinese Journal of Chemical Engineering 2016年第10期24卷 1487-1496页

作者： changdong li Carlos Amador Yulong Ding Institute of Particle Science and Engineering University of LeedsLeedsUK Procter&Gamble Newcastle-Upon-Tyne Innovation Centre NewcastleUK School of Chemical Engineering University of BirminghamBirminghamUK

Dissolution kinetics of sodium carbonate is investigated with the image analysis method at the approach of single *** dissolution experiments are carried out in an aqueous solution under a series of controlled temperature and p *** selected sodium carbonate particles are all spherical with the same mass and *** dissolution process is quantified with the measurement of particle diameter from dissolution *** concentration of dissolved sodium carbonate in solvent is calculated with the measured diameter of *** surface reaction model and mass transport model are implemented to determine the dissolution mechanism and quantify the dissolution rate constant at each experimental *** to the fitting results with both two models,it is clarified that the dissolution process at the increasing temperature is controlled by the mass transport of dissolved sodium carbonate travelling from particle surface into *** dissolution process at the increasing pH is controlled by the chemical reaction on particle ***,the dissolution rate constant for each single spherical sodium carbonate particle is quantified and the results show that the dissolution rate constant of single spherical sodium carbonate increases significantly with the rising of temperature,but decreases with the increasing of pH conversely.

关键词： Sodium carbonate Single particle Dissolution rate constant Image analysis

圆截面组合桩加固滑坡的作用机理与合理嵌固深度物理模型试验研究

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安全与环境工程 2024年第1期31卷 135-149页

作者：宋成彬李长冬王贵华姚文敏贺鑫方堃中国地质大学(武汉)工程学院湖北武汉430074 中国地质大学(武汉)湖北巴东地质灾害国家野外科学观测研究站湖北武汉430074 郑州大学土木工程学院河南郑州450001 中交第四航务工程勘察设计院有限公司广东广州510230

目前在滑坡治理中,大截面人工挖孔桩因存在施工安全隐患大和效率低下等问题已在部分行业领域被限制使用,开展可机械化施工的圆截面组合桩研究已成为新的趋势,但当前对圆截面组合桩变形受力机理与合理嵌固深度的研究尚不够深入。基于自... 详细信息

目前在滑坡治理中,大截面人工挖孔桩因存在施工安全隐患大和效率低下等问题已在部分行业领域被限制使用,开展可机械化施工的圆截面组合桩研究已成为新的趋势,但当前对圆截面组合桩变形受力机理与合理嵌固深度的研究尚不够深入。基于自主研发的圆截面组合桩加固滑坡物理模型试验系统,开展了不同工况下圆截面组合桩加固滑坡的物理模型试验,分析了滑体的变形演化过程,研究了圆截面组合桩加固下滑体与抗滑桩的变形受力特征,并对比分析了不同嵌固深度和桩顶连系梁对圆截面组合桩变形特征的影响,揭示了圆截面组合桩加固滑坡的作用机理。结果表明:①滑体的变形演化过程可分为压密、匀速变形、加速变形和变形破坏4个阶段;②前后桩均存在反弯点,反弯点会随着试验进程向桩顶移动,且后桩的反弯点更接近于滑动面;③当一排桩的嵌固深度保持不变、另一排桩的嵌固深度改变时,可将36%的桩长作为合理的嵌固深度;④连系梁使后桩的最大桩顶位移减小了15.6%,而对前桩的影响不大;⑤连系梁的存在降低了滑动面处的最大桩身弯矩,从而使得桩身弯矩分布更加合理。该研究成果有望为圆截面组合桩的设计提供借鉴和参考。

关键词：滑坡加固圆截面组合桩加固机理嵌固深度物理模型试验

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A Predictive,Two-Parameter Model for the Movement of Reservoir Landslides

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Journal of Earth Science 2020年第6期31卷 1051-1057页

作者： Robert E.Criss Wenmin Yao changdong li Huiming Tang Department of Earth and Planetary Sciences Washington UniversitySt.Louis MO 63130USA Faculty of Engineering China University of GeosciencesWuhan 430074China

Monitoring data show that many landslides in the Three Gorges region,China,undergo step-like displacements in response to the managed,quasi-sinusoidal annual variations in reservoir *** behavior is consistent with motion initiating when the reservoir water level falls below a critical level that is intrinsic to each landslide,with the subsequent displacement rate of the landslide being proportional to the water depth below that critical *** motion terminates when the water level rises back above the critical level,so the annual step size is the time integral of the instantaneous displacement *** responses are incorporated into a differential equation that is easily calibrated with monitoring data,allowing prediction of landslide movement from actual or anticipated reservoir level *** successes include(1)initiation and termination of the annual sliding steps at the critical reservoir level,producing a series of steps;(2)prediction of variable step size,year to year;and(3)approximate prediction of the shape and size of each annual *** rainfall correlates poorly with step size,probably because its effect on groundwater levels is dwarfed by the 30 m annual variations in the level of the Three Gorges *** landslide behavior is suggested.

关键词： reservoir landslide parsimonious model step-like displacement displacement prediction critical reservoir level