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Knowledge and practice of earthquake management among apartment dwellers: A case study of Jakarta City, Indonesia 公寓居民的地震管理知识与实践:以印尼雅加达市为例
IF 3.4 Q1 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2026-03-01 Epub Date: 2025-07-04 DOI: 10.1016/j.jnlssr.2025.100225
Fatmah , Irene Sondang Fitrinitia , Sumiaty Ambran
Urban city apartments and flat dwellers face increasing threats from earthquakes, and the current understanding and implementation of earthquake risk reduction techniques in high-rise housing communities remain lacking. Therefore, this study examined the relationships between earthquake management practices and demographic characteristics, vertical housing features, earthquake management knowledge, and emergency response plans. The research employed a cross-sectional study design and included 215 participants from 14 selected apartments. The findings indicated that (1) earthquake management practices vary among individuals aged 35–54, types of dwelling units, dwelling sizes, numbers of rooms, those who have resided in an apartment for 3–5 years, emergency response plans, and knowledge regarding earthquake management (before, during, and after); (2) earthquake management knowledge levels (including mitigation and self-rescue knowledge during an earthquake) are low; (3) emergency response and earthquake management practices are insufficient; and (4) apartment dwellers with moderate knowledge levels of earthquake self-rescue are 12.2 times more likely to have moderate earthquake management practices than those without (OR = 12.2, p = 0.000). The study recommends that the National Disaster Management Authority and the Jakarta City Disaster Risk Reduction Forum collaborate with building managers to develop an annual earthquake mitigation programme to enhance knowledge levels regarding earthquake risk reduction.
城市公寓和公寓居民面临着越来越多的地震威胁,目前高层住宅社区对地震风险降低技术的理解和实施仍然缺乏。因此,本研究考察了地震管理实践与人口特征、垂直房屋特征、地震管理知识和应急响应计划之间的关系。该研究采用了横断面研究设计,包括来自14个选定公寓的215名参与者。结果表明:(1)35 ~ 54岁、住宅单元类型、住宅面积、房间数、居住年限3 ~ 5年、应急预案、地震管理知识(地震前、地震中、地震后)等方面的地震管理实践存在差异;(2)地震管理知识水平(包括地震减灾和自救知识)较低;(3)应急响应和地震管理实践不足;(4)具有中等地震自救知识水平的公寓居民具有中等地震自救知识水平的可能性是无地震自救知识水平的公寓居民的12.2倍(OR = 12.2, p = 0.000)。该研究建议国家灾害管理局和雅加达市减少灾害风险论坛与建筑物管理人员合作,制定一个年度地震减灾方案,以提高有关减少地震风险的知识水平。
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引用次数: 0
Optimizing urban infrastructure resilience: Analyzing cascading failures and critical node dependencies through multilayer network models 优化城市基础设施弹性:通过多层网络模型分析级联故障和关键节点依赖关系
IF 3.4 Q1 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2026-03-01 Epub Date: 2025-08-07 DOI: 10.1016/j.jnlssr.2025.100245
Cong Lu , Jianjun She , Hezhi Pan , Zihao Guo , Xuanling Zhou , Zhijian Li
As urbanization and industrialization progress, urban infrastructure systems grow increasingly complex, heightening their vulnerability to cascading failures from natural disasters and human-induced disruptions. Strengthening the resilience of these systems is critical for sustainable urban development and sustaining residents’ quality of life. This study introduces a novel framework to analyze cascading failure propagation within infrastructure networks. Utilizing the implicit interdependency model, we construct a multilayer network that delineates interconnections and dependencies across infrastructure sectors. The PageRank algorithm is used to identify critical nodes by evaluating their network centrality, thereby highlighting key components within the system. Through simulations of random, PageRank-based, and betweenness-based attack scenarios, we explore failure dynamics and their propagation patterns. Additionally, we evaluate mitigation strategies, with the community periphery augmentation strategy proving most effective, enhancing resilience by linking peripheral nodes between communities. This research systematically connects the significance of key nodes to cascading effects, uncovering vulnerabilities and providing actionable insights for disaster response and recovery planning.
随着城市化和工业化进程的推进,城市基础设施系统变得越来越复杂,更容易受到自然灾害和人为破坏的连锁故障的影响。加强这些系统的复原力对于可持续城市发展和维持居民的生活质量至关重要。本研究引入了一个新的框架来分析基础设施网络中的级联故障传播。利用隐式相互依赖模型,我们构建了一个多层网络,描绘了基础设施部门之间的相互联系和依赖关系。PageRank算法通过评估其网络中心性来识别关键节点,从而突出显示系统中的关键组件。通过模拟随机的、基于pagerank的和基于之间的攻击场景,我们探索了故障动态及其传播模式。此外,我们还评估了缓解策略,其中社区外围增强策略被证明是最有效的,通过连接社区之间的外围节点来增强复原力。本研究系统地将关键节点的重要性与级联效应联系起来,揭示漏洞,并为灾难响应和恢复计划提供可操作的见解。
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引用次数: 0
Prediction of wheat stem biomass using a new unified model driven by phenological variable under remote-sensed canopy vegetation index constraints 遥感冠层植被指数约束下物候变量驱动的小麦茎生物量统一预测模型
IF 12.4 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-03-01 Epub Date: 2025-11-22 DOI: 10.1016/j.aiia.2025.11.007
Weinan Chen , Guijun Yang , Yang Meng , Haikuan Feng , Hongrui Wen , Aohua Tang , Jing Zhang , Hao Yang , Heli Li , Xingang Xu , Changchun Li , Zhenhong Li
Timely and accurate prediction of stem dry biomass (SDB) is crucial for monitoring crop growing status. However, conventional biomass estimation models are often limited by the influence of crop growth phase, which significantly restricts their temporal and spatial transferability. This study aimed to develop a semi-mechanistic stem biomass prediction model (PVWheat-SDB) using phenological variable (PV) to accurately predict winter wheat SDB across different growth stages. The core of the model is to predict SDB using PV under remote-sensed canopy vegetation indices (VIs) constraint. The results demonstrated that VIs can quantify the variations in stem growth equations under different planting conditions and varieties. The developed a PVWheat-SDB model using normalized difference red edge (NDRE) and accumulated growing degree days (AGDD) performed well for SDB predictions, with R2, RMSE, nRMSE and MAE values of 0.88, 75.48 g/m2, 8.04 % and 55.36 g/m2 for the validation datasets of field spectral reflectance, and 0.82, 81.76 g/m2, 11.22 % and 62.82 g/m2 when transferred to unmanned aerial vehicle (UAV) hyperspectral images. Furthermore, the model can not only estimate SDB at the current growth stage, but also predict SDB of subsequent phenological stages. The growth stage stacking strategy indicated that the model accuracy improves significantly as more growth stages are incorporated, especially during the reproductive stages. These results all highlight the robustness and transferability of the PVWheat-SDB model in accurately predicting SDB across different growing seasons and growth stages.
及时准确地预测茎干生物量对监测作物生长状况至关重要。然而,传统的生物量估算模型往往受到作物生长阶段的影响,这严重限制了其时空可移植性。本研究旨在利用物候变量(PV)建立半机械性的冬小麦茎生物量预测模型(PVWheat-SDB),以准确预测冬小麦不同生育期的茎生物量。该模型的核心是在遥感冠层植被指数(VIs)约束下利用PV预测深发展。结果表明,VIs可以量化不同种植条件和品种下茎秆生长方程的变化。利用归一化差分红边(NDRE)和累积生长度数(AGDD)建立pv小麦-SDB模型,对田间光谱反射率验证数据集的R2、RMSE、nRMSE和MAE值分别为0.88、75.48 g/m2、8.04%和55.36 g/m2,对无人机高光谱图像的预测值分别为0.82、81.76 g/m2、11.22%和62.82 g/m2。此外,该模型不仅可以预测当前生长阶段的深发展,还可以预测后续物候阶段的深发展。生长期叠加策略表明,随着生长期的增加,模型精度显著提高,尤其是在繁殖期。这些结果都突出了PVWheat-SDB模型在准确预测不同生长季节和生长阶段SDB方面的稳健性和可移植性。
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引用次数: 0
Hydrochar supported Mg–Fe layered double hydroxide hybrid for efficient and reusable removal of tetracyclines from water 氢炭负载的Mg-Fe层状双氢氧化物混合物用于高效和可重复使用的水中四环素的去除
IF 6.9 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-03-01 Epub Date: 2026-01-01 DOI: 10.1016/j.emcon.2025.100623
Jeffrey Saúl Cedeño-Muñoz , Bryan Jesus Zumarraga-Valencia , Jaime E. Cevallos-Mendoza , Bryan Fernando Rivadeneira-Mendoza , Iris B. Pérez-Almeida , Krishna Kumar Yadav , María Dolores Saquete , Nuria Boluda-Botella , Joan Manuel Rodríguez-Díaz
A hybrid photocatalyst, Mg–Fe-LDH@HC (layered double hydroxide supported on corn-stalk hydrochar), was synthesized via coprecipitation and evaluated for the removal and photodegradation of tetracyclines in water. X-ray diffraction (XRD) confirmed the formation of a hydrotalcite-like phase with partial amorphous carbon contribution, while SEM–EDS mapping evidenced a uniform dispersion of Mg–Fe-LDH over the hydrochar surface. The hybrid exhibited an apparent optical bandgap of 1.81 eV, favoring visible-light absorption. Under ultraviolet irradiation and optimized operational conditions (H2O2 = 5.4 μM, pH = 6.0, 25 °C), Mg–Fe-LDH@HC achieved 99.09 % total tetracycline degradation after 120 min. Kinetic fitting followed a pseudo-second-order model (R2 > 0.94), indicating a chemisorption-dominated mechanism coupled with reactive oxygen species (ROS) generation. Radical scavenging and EDTA inhibition tests demonstrated that photogenerated electrons and •OH radicals were the main oxidative agents, with additional contributions from a heterogeneous Fenton pathway with no evidence of a homogeneous Fenton mechanism. The catalyst retained 91.3 % of its initial efficiency after five reuse cycles, with partial recovery after mild regeneration. Acute toxicity assays using Artemia salina, Daphnia magna, and Raphidocelis subcapitata revealed a 65–80 % reduction in post-treatment toxicity compared to the untreated effluent. These results demonstrate that Mg–Fe-LDH@HC is an efficient, recyclable, and eco-compatible photocatalyst for the degradation of antibiotic contaminants in water systems.
采用共沉淀法合成了复合光催化剂Mg - Fe-LDH@HC(玉米秸秆炭负载层状双氢氧化物),并对其去除水中四环素的光降解效果进行了研究。x射线衍射(XRD)证实了类水滑石相的形成,其中有部分非晶态碳的贡献,而SEM-EDS映射证实了Mg-Fe-LDH在水合物表面的均匀分散。该杂化材料的光学带隙为1.81 eV,有利于可见光的吸收。在紫外光照射下,优化操作条件(H2O2 = 5.4 μM, pH = 6.0, 25℃)下,Mg - Fe-LDH@HC在120 min后总四环素的降解率达到99.09%。动力学拟合遵循伪二阶模型(R2 > 0.94),表明化学吸附为主的机制与活性氧(ROS)的产生相结合。自由基清除和EDTA抑制试验表明,光生电子和•OH自由基是主要的氧化剂,非均相芬顿途径也有额外的贡献,没有证据表明是均相芬顿机制。经过5次循环使用后,催化剂的效率仍保持在初始效率的91.3%,轻度再生后可部分恢复。急性毒性试验使用青蒿,大水蚤,和Raphidocelis subcapitata显示处理后毒性降低65 - 80%相比,未经处理的流出物。这些结果表明,Mg - Fe-LDH@HC是一种有效的、可回收的、生态相容的光催化剂,用于降解水系统中的抗生素污染物。
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引用次数: 0
Distribution, driving factors and prediction of antibiotics in Asia's largest River Basin: Comprehensive insights of Yangtze River Basin, China 亚洲最大流域抗生素分布、驱动因素及预测——以中国长江流域为例
IF 6.9 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-03-01 Epub Date: 2026-01-01 DOI: 10.1016/j.emcon.2026.100624
Jiamei Zhang , Yuyang Zhu , Yu Wang , Xing Chen , Guolian Li , Gege Cai , Fazhi Xie , Youqiang Sun
Antibiotics have been a global concern because of their widespread occurrence and adverse effects on aquatic environments, particularly in large-scale river basins. However, their environmental fate in the Yangtze River Basin remains underexplored. In the present study, we investigated 31 antibiotics in surface water throughout the Yangtze River Basin, the largest river system in China and Asia. The total antibiotic concentrations ranged from 142.05 to 345.57 ng/L, with fluoroquinolones (FQs) predominating and accounting for 75.68 % of the total concentration. Higher antibiotic concentrations were observed in the midstream and downstream regions, particularly in the three major economic zones of the Yangtze River Basin, likely driven by rapid economic development and urbanization. Agricultural and livestock farming intensity, along with nitrogen and phosphorus levels, has significant positive effects on antibiotic concentrations. Antibiotic concentrations showed negative correlations with microbial diversity and community composition, suggesting potential links to shifts in microbial community structure. Analysis using the Positive Matrix Factorization (PMF) model identified four major sources of antibiotic pollution: livestock waste (31.30 %), aquaculture runoff (24.89 %), hospital discharges (21.95 %), and sewage treatment effluents (21.86 %). We also employed four machine learning (ML) models to relate antibiotic concentrations to explanatory variables, enabling prediction of their distribution across the Yangtze River Basin. The Random Forest model demonstrated superior performance in predicting the concentrations of FQs and tetracyclines (TCs), with R2 values of 0.75 and 0.74, respectively. The results of this study provide new insights into the transport behavior and prediction of antibiotic concentrations in large river basins.
抗生素因其广泛存在和对水生环境的不利影响而受到全球关注,特别是在大型河流流域。然而,它们在长江流域的环境命运仍未得到充分探讨。本研究对中国乃至亚洲最大水系长江流域地表水中的31种抗生素进行了研究。抗生素总浓度为142.05 ~ 345.57 ng/L,以氟喹诺酮类药物(FQs)为主,占总浓度的75.68%。中下游地区抗生素浓度较高,特别是长江流域三大经济区,这可能是由经济快速发展和城市化驱动的。农业和畜牧业强度以及氮和磷水平对抗生素浓度有显著的积极影响。抗生素浓度与微生物多样性和群落组成呈负相关,表明可能与微生物群落结构的变化有关。利用正矩阵分解(PMF)模型进行分析,确定了抗生素污染的四个主要来源:畜禽废弃物(31.30%)、水产养殖径流(24.89%)、医院排放(21.95%)和污水处理出水(21.86%)。我们还使用了四个机器学习(ML)模型将抗生素浓度与解释变量联系起来,从而能够预测它们在长江流域的分布。随机森林模型在预测FQs和四环素(TCs)浓度方面表现出较好的性能,R2分别为0.75和0.74。本研究结果为大型河流流域抗生素浓度的迁移行为和预测提供了新的见解。
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引用次数: 0
Utilizing interpretable machine learning algorithms and multiple features from multi-temporal Sentinel-2 imagery for predicting wheat fusarium head blight 利用可解释机器学习算法和多时相Sentinel-2图像的多种特征预测小麦赤霉病
IF 12.4 Q1 AGRICULTURE, MULTIDISCIPLINARY Pub Date : 2026-03-01 Epub Date: 2025-10-27 DOI: 10.1016/j.aiia.2025.10.012
Hui Wang , Chao Ruan , Jinling Zhao , Yunran Wang , Ying Li , Yingying Dong , Linsheng Huang
Wheat Fusarium head blight (FHB) severely affects wheat yields, and predicting its occurrence and spatial distribution is essential for safeguarding crop production. This study presents an interpretable machine learning method designed to predict FHB by leveraging multi-temporal and multi-feature information obtained from Sentinel-2 imagery. During the regreening and grain-filling stages, we extracted vegetation indices (VIs), texture features (TFs), and color indices (CIs). Single-temporal features were derived from the grain-filling stage, while multi-temporal features combined data from grain-filling and regreening stages. The synthetic minority over-sampling technique (SMOTE) was employed to adjust the class imbalance, while the most significant characteristics were found using the sequential forward selection (SFS) approach. The extreme gradient boosting (XGBoost) model, optimized using simulated annealing (SA) algorithm and explained via SHapley Additive exPlanation (SHAP) method, integrated VIs, TFs, and CIs as input features. The presented model demonstrated exceptional results, achieving a prediction accuracy of 89.9 % across multi-temporal and a Kappa coefficient of 0.797. It outperformed random forests (RF), backpropagation neural networks (BPNN), and support vector machines (SVM) model. This study indicates that an interpretable machine learning approach, which utilizes both multi-temporal and multi-feature data, is effective in forecasting FHB, thereby providing a valuable tool for agricultural management and disease prevention strategies.
小麦赤霉病(FHB)严重影响小麦产量,预测其发生和空间分布对保障作物生产至关重要。本研究提出了一种可解释的机器学习方法,旨在利用从Sentinel-2图像中获得的多时相和多特征信息来预测FHB。在复绿和灌浆阶段,提取植被指数(VIs)、纹理特征(tf)和颜色指数(CIs)。单时间特征来源于籽粒灌浆阶段,多时间特征来源于籽粒灌浆和返青阶段。采用合成少数过采样技术(SMOTE)来调整类不平衡,而采用顺序正向选择(SFS)方法发现最显著的特征。极端梯度增强(XGBoost)模型采用模拟退火(SA)算法进行优化,并通过SHapley加性解释(SHAP)方法进行解释,将VIs、tf和CIs作为输入特征。该模型在多时段的预测精度为89.9%,Kappa系数为0.797。它优于随机森林(RF)、反向传播神经网络(BPNN)和支持向量机(SVM)模型。该研究表明,利用多时相和多特征数据的可解释机器学习方法可以有效地预测FHB,从而为农业管理和疾病预防策略提供有价值的工具。
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引用次数: 0
Nonlinear free vibrations of functionally graded graphene origami-enabled auxetic metamaterial skew-microplates with variable thickness using isogeometric analysis 利用等几何分析研究变厚度功能梯度石墨烯折纸辅助超材料斜微板的非线性自由振动
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2026-03-01 Epub Date: 2025-09-19 DOI: 10.1016/j.dt.2025.09.024
Vu Ngoc Anh , Tran Van Ke , Nguyen Thi Thu Huong , Nguyen Thi Hue , Pham Hoang Tu
The remarkable mechanical and physical characteristics of functionally graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) structures, including their high strength-to-weight ratio, tunable stiffness and strength, and negative Poisson's ratio (NPR), have demonstrated significant promise for a range of engineering applications. This paper aims to investigate the nonlinear free vibrations behaviors of FG-GOEAM non-uniform thickness skew-microplate with rectangular and elliptical planform and resting on Kerr-elastic foundation in thermal environment. Within the framework of the higher-order shear deformation theory (HSDT), von Kármán assumption, modified couple stress theory (MCST) and by employing Hamilton's principle the nonlinear governing equations of motion are established. By combining an iterative technique with a displacement control strategy, an isogeometric analysis (IGA) approach used to determine the nonlinearity in free vibration, as measured by the nonlinear frequency ratio associated with the center deflection amplitude. The effects of GOri distribution patterns, weight fraction, length-scale parameter, temperature difference, skew-angle, and micro-plate dimensions on the nonlinear free vibrations behaviors of the FG-GOEAM non-uniform thickness skew-microplate are revealed through a thorough parametric study. This result can be applied in studies on the design of micro-electro-mechanical devices operating in various complex environments and conditions.
功能梯度(FG)石墨烯折纸(GOri)辅助超材料(GOEAM)结构具有显著的机械和物理特性,包括其高强度重量比、可调刚度和强度以及负泊松比(NPR),在一系列工程应用中显示出巨大的前景。本文旨在研究基于克尔弹性地基的FG-GOEAM矩形和椭圆非均匀厚度斜微板在热环境下的非线性自由振动行为。在高阶剪切变形理论(HSDT)、von Kármán假设和修正耦合应力理论(MCST)的框架下,利用Hamilton原理建立了非线性运动控制方程。通过将迭代技术与位移控制策略相结合,采用等几何分析(IGA)方法来确定自由振动的非线性,通过与中心挠度幅值相关的非线性频率比来测量。通过深入的参数研究,揭示了GOri分布模式、重量分数、长度尺度参数、温差、倾斜角度和微板尺寸对FG-GOEAM非均匀厚度倾斜微板非线性自由振动行为的影响。该结果可应用于在各种复杂环境和条件下工作的微机电装置的设计研究。
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引用次数: 0
Effects of end caps of cylindrical casing on fragment velocity distribution 圆柱形机匣端盖对破片速度分布的影响
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2026-03-01 Epub Date: 2025-09-27 DOI: 10.1016/j.dt.2025.09.033
Yueguang Gao , Jianping Fu , Siyu Wu , Xuke Lan , Kai Ren , Rui Yang
Fragment velocity distribution is an important parameter affecting the terminal effects of warheads. The rarefaction wave, end cap, and its confinement state can significantly affect the fragmentation of the cylindrical charge casing. Most of the existing studies have performed experiments and simulations considering the rarefaction wave and unfixed end caps; research on fixed end caps and sufficient theoretical explanations are limited. In this work, the effects of rarefaction waves, end caps, and their fixed states, on the fragment velocity distribution, were studied via experimentation and simulation, and reasonable theoretical explanations were provided. The results show that the rarefaction wave and end caps affect the fragment velocity by changing the pressure states of the detonation products. At the initiation end, the fragment velocities of casings with unfixed initiation ends are 33.3% (300 m/s) greater than that of casings without end caps, because of the weakening of the attenuation effect of the rarefaction wave. The fragment velocities of the casings with fixed initiation ends are 8.3% (100 m/s) greater than that of casings with unfixed initiation ends. At the non-initiation end, the fragment velocities are 24.8% (297 m/s) greater than that of a casing without end caps, and the reflecting shock wave generated by the fixed non-initiation end increases the fragment velocity by 7.3% (113 m/s), compared to the theoretical velocity. This work provides a basis for the structural design and analysis of the terminal effects of warheads.
破片速度分布是影响弹头末效的重要参数。稀薄波、端帽及其约束状态对圆柱形装药机匣破片有显著影响。现有的研究大多是在考虑稀疏波和不固定端盖的情况下进行实验和模拟;对固定端盖的研究和充分的理论解释是有限的。本文通过实验和模拟研究了稀薄波、端帽及其固定状态对破片速度分布的影响,并给出了合理的理论解释。结果表明,稀薄波和端帽通过改变爆轰产物的压力状态来影响破片速度。在起爆端,未固定起爆端筒的破片速度比未固定起爆端筒的破片速度大33.3% (300 m/s),这是由于稀散波的衰减作用减弱所致。起爆端固定的破片速度比起爆端不固定的破片速度大8.3% (100 m/s)。在非起爆端破片速度比无端帽机匣高24.8% (297 m/s),固定非起爆端产生的反射激波使破片速度比理论速度提高了7.3% (113 m/s)。这项工作为战斗部末端效应的结构设计和分析提供了依据。
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引用次数: 0
Dynamic behavior and damage evaluation of prototype caisson wharf against underwater explosion 原型沉箱码头水下爆炸动力性能及损伤评估
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2026-03-01 Epub Date: 2025-09-12 DOI: 10.1016/j.dt.2025.09.017
Ziqi Chen , Yudi Zhou , Yuehua Cheng , Hao Wu
Gravity-caisson wharves have been widely constructed in coastal and island regions, which are threaten by potential underwater explosions. This work aims to study the dynamic behaviors and propose a damage evaluation approach of caisson wharf against underwater explosion. Firstly, based on both the underwater explosion loading test and underwater explosion test on the reduced-scale caisson specimen, a high-fidelity finite element analysis approach for numerically reproduce the dynamic behaviors of prototype caisson wharves against underwater explosions was proposed and verified. Secondly, the underwater explosion loadings and dynamic behaviors of prototype caisson wharf (14.9 m×8.1 m×10.95 m) against sequential blast wave and bubble pulsation of typical torpedo with a charge weight of 200 kg were studied. The influences of the seabed and cabin infill materials, as well as the explosion standoff distances of 3.4–10.2 m and depths of burst between 1/4 and 3/4 of water depth, on the blast resistance of caisson wharf were further examined through deflection distributions of exterior wall, damage evolution, and overall displacement of caisson wharf. Finally, a performance evaluation approach for prototype caisson wharves against underwater explosions was proposed by comprehensively considering the bearing, storage, and berthing capabilities. The corresponding protective measures and design recommendations were further provided. It indicates that: (i) under the explosion of a typical torpedo, the damage modes of prototype caisson wharf mainly involve the overall vibration, spalling and cracking of the exterior wall, collapse of the upper operating platform and cracking of the top plate; (ii) the blast wave and cavitation zone generated between the bubble and the exterior wall are the two primary causes of damage to caisson wharf; (iii) compared to the saturated calcareous sand seabed, the assumption of rigid seabed underestimates the spalling on the exterior wall, which is not recommended for scenarios where cavitation zones may generate; (iv) rock rubble is the most effective infill material in improving the blast resistance of caisson wharf among four types of infill configurations, i.e., fully filled and half-filled saturated calcareous sand, rock rubble and pure water; (v) the standoff distance of 10.2 m is regarded as a secure protective range in the scenarios discussed currently. As the standoff distance decreases and the depth of burst increases, the spalling of the exterior wall induced by the cavitation intensifies, posing a great threat to the functionality of caisson wharf.
重力沉箱码头广泛建设在沿海和海岛地区,这些地区存在潜在的水下爆炸威胁。本文旨在研究沉箱码头在水下爆炸作用下的动力特性,并提出一种损伤评估方法。首先,基于水下爆炸加载试验和缩小尺寸的沉箱试样水下爆炸试验,提出了一种高保真的数值再现原型沉箱码头水下爆炸动力特性的有限元分析方法,并进行了验证。其次,研究了原型沉箱码头(14.9 m×8.1 m×10.95 m)在典型装药200 kg鱼雷连续冲击波和气泡脉动作用下的水下爆炸载荷和动力特性。通过沉箱码头外墙挠度分布、损伤演化和整体位移,进一步考察了海底和舱室填方材料、爆炸距离3.4 ~ 10.2 m、爆炸深度1/4 ~ 3/4水深范围对沉箱码头抗震性的影响。最后,提出了综合考虑承载能力、储运能力和靠泊能力的原型沉箱码头抗水下爆炸性能评价方法。并提出了相应的防护措施和设计建议。结果表明:(1)在典型鱼雷爆炸作用下,原型沉箱码头的破坏形式主要为整体振动、外墙剥落开裂、上部作业平台倒塌、顶板开裂;(ii)爆破波和气泡与外墙之间产生的空化区是沉箱码头破坏的两个主要原因;(iii)与饱和钙质砂质海床相比,刚性海床的假设低估了外墙的剥落,不建议在可能产生空化区的情况下采用这种假设;(iv)在全填和半填饱和钙质砂、石料和纯水4种填筑形式中,石料是提高沉箱码头抗爆破能力最有效的填筑材料;(v)在目前讨论的方案中,10.2米的距离被视为安全防护范围。随着间隔距离的减小和爆破深度的增加,由空化引起的外墙剥落加剧,对沉箱码头的功能构成极大的威胁。
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引用次数: 0
Machine learning for occupational accident analysis: Applications, challenges, and future directions 机器学习用于职业事故分析:应用、挑战和未来方向
IF 3.4 Q1 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Pub Date : 2026-03-01 Epub Date: 2025-08-29 DOI: 10.1016/j.jnlssr.2025.100250
Izuchukwu Chukwuma Obasi, Pericles Cheng, Cleo Varianou-Mikellidou, Christos Dimopoulos, Georgios Boustras
Machine learning (ML) drives progress in occupational accident prevention across diverse sectors. However, significant challenges persist in aligning these tools with practical safety needs, including accurate risk assessment, incident prediction, and targeted prevention strategies. While prior reviews focused narrowly on specific industries or data types, this study presents a comprehensive analysis of ML models in accident analysis, categorizing them by accident type, industry application, and modeling methodology. This study addresses critical challenges in ML model development—such as data quality, hyperparameter tuning, and managing class imbalances—and examines less-discussed topics, including explanatory variable selection and strategies for mitigating overfitting. This review thoroughly assesses the current state of ML-based accident prediction, highlighting critical gaps, methodological limitations, and potential research directions. By analyzing 504 studies across three perspectives—Accident Type, Industry Application, and Modeling Methodology—this review identifies pressing challenges, including (1) limitations in data quality and availability, especially for real-time sources; (2) inadequate model interpretability across applications; (3) difficulties in handling imbalanced accident datasets; and (4) the lack of an integrated framework for incorporating proactive data and industry-specific risk factors. The findings outline a roadmap for advancing ML in occupational safety by enhancing model robustness, improving interpretability, and expanding data sources. This review aims to better align ML applications with safety objectives, promoting data-driven approaches for effective accident analysis and prevention across industries.
机器学习(ML)推动了各个部门在职业事故预防方面的进步。然而,在将这些工具与实际安全需求相结合方面仍然存在重大挑战,包括准确的风险评估、事件预测和有针对性的预防策略。虽然之前的评论只关注特定的行业或数据类型,但本研究对事故分析中的ML模型进行了全面分析,并根据事故类型、行业应用和建模方法对其进行了分类。本研究解决了机器学习模型开发中的关键挑战,如数据质量、超参数调优和管理类不平衡,并研究了较少讨论的主题,包括解释变量选择和减轻过拟合的策略。本文全面评估了基于机器学习的事故预测的现状,强调了关键差距、方法局限性和潜在的研究方向。通过从事故类型、行业应用和建模方法三个角度分析504项研究,本综述确定了紧迫的挑战,包括:(1)数据质量和可用性的限制,特别是对于实时来源;(2)不同应用的模型可解释性不足;(3)不平衡事故数据集处理困难;(4)缺乏整合前瞻性数据和行业特定风险因素的综合框架。研究结果概述了通过增强模型鲁棒性、提高可解释性和扩展数据源来推进ML在职业安全中的发展路线图。此次审查旨在更好地将机器学习应用与安全目标结合起来,促进数据驱动的方法,以便在各个行业进行有效的事故分析和预防。
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引用次数: 0
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