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Effects of biochar on rainwater redistribution, soil water evaporation and desiccation cracking: A case study of limestone soil in karst areas of southwest China

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Science of the Total Environment 2025年 965卷 178692页

作者： Si, Dantong Lin, Yuze Xu, Qinxue Zhang, Shuaipu Engineering Research Center of Watershed Protection and Green Development University of Guangxi Guilin University of Technology Guilin541006 China Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology Guilin University of Technology Guilin541006 China

Soil desiccation cracking, which leads to increased water loss and the destruction of soil integrity, can significantly exacerbate drought conditions and soil degradation. Biochar derived from organic waste can effectively reduce soil desiccation cracking as a sustainable soil amendment. However, the effects of biochar on the entire process of rainfall infiltration, soil water evaporation, and subsequent desiccation cracking remain unclear. In this study, simulated rainfall-evaporation experiments were conducted on limestone soil in karst areas with severe water leakage and susceptibility to cracking, using improved soil with corn straw biochar (CSB), rice husk biochar (RHB), and bagasse biochar (BB) at 0 %, 2 %, 4 %, and 6 % application rates, respectively. Surface runoff (SR) and underground percolation (UP) were collected during rainfall events, whereas soil water storage (SWS) was measured after the rainfall events. Each sample was weighed at intervals during evaporation (3–5 days) to monitor the soil water content, and the corresponding crack morphology was photographed. The results indicated that SWS increased by 6.23 %–35.14 % while UP decreased by 11.39 %–49.95 % for the different types of biochar compared to the control. Biochar application increased the evaporation rate, but reduced the evaporation loss rate of soil water, allowing the soil to maintain a high water content for a longer evaporation period. The application of biochar inhibited crack propagation and reduced the final cracking degree, particularly when BB was applied. The biochar-amended soil had a smaller had lower crack ratio (Rcr), mean crack width (wcr), box-counting fractal dimension (Db), and crack network connectivity (Cnet) compared to the control. Based on our results, we suggest the application of 6 % CSB or BB to limestone soils in karst areas. This study provides a scientific basis for the use of biochar to increase soil water content and minimise cracking. © 2025 Elsevier B.V.

关键词： Limestone

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Prediction of fracture and dilatancy in granite using acoustic emission signal cloud

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Journal of Rock Mechanics and Geotechnical engineering 2021年第5期13卷 1059-1077页

作者： Dongjie Xue Lan Lu Lie Gao Lele Lu Cheng Chen School of Mechanics and Civil Engineering China University of Mining and TechnologyBeijing100083China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing400030China Key Laboratory of Safety and High-efficiency Coal Mining Anhui University of Science and TechnologyHuainan232001China

The invisibility of fracture network evolution in the rock under triaxial compression seriously restricts the correlation modeling between dilatancy behavior and fracture *** key to solving such a challenge is strongly dependent on the accurate modeling of the spatial correlation in fracture network,which could be indirectly re-constructed by the acoustic emission(AE)signal *** the interaction of local fractures,a cube cluster approach is established to describe the spatial *** evolutional cube clusters effectively present the geometric characteristics induced by the increasing dilatancy of *** descriptors(***-axis length sum and pore fraction)are introduced to correlate cluster model with dilatancy *** fitting results support the linear correlation between two descriptors and volumetric strain,which verifies the sensitiveness of the cube cluster model to *** importantly,by the statistical analysis of cluster structure,the cluster model shows the potential of calculating fracture ***,a comparison between dilatancybased damage and porosity-based damage is made not to prove the best but provide an AE-based prediction of local damage ***,four classical models for calculating fracture angle are *** deviations prove the huge difficulty of describing the development of the fracture network uniquely dependent on a fracture *** proximity of measured angle and cluster-based angle supports the effectiveness of predication by the cube cluster approach.

关键词： Fracture network Acoustic emission(AE) Spatial correlation Dilatancy Damage Fracture angle

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Prescribed performance-based adaptive dynamic surface control for pump-controlled hydraulic systems with matched and mismatched disturbances

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Alexandria engineering Journal 2025年 128卷 544-555页

作者： Qian-Kun Liang Yan Cai Bing-Long Wang Jin-Chun Song Hubei Key Laboratory of Aerospace Intelligent Control Technology Hubei Sanjiang Aerospace Hongfeng Control Ltd China Space Sanjiang Group Ltd Xiaogan 432003 China State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110169 China Key Laboratory of Marine Robotics Shenyang Liaoning Province 110169 China School of Mechanical Engineering and Automation Northeastern University Shenyang 110819 China

Uncertainties, including parametric and unstructured uncertainty, are the main obstacles for hydraulic systems to achieve high precision control. This paper investigates the asymptotic tracking problem of a pump-controlled hydraulic system subject to parametric uncertainties and matched and mismatched time-varying disturbances. First, a predefined performance function is introduced into the controller design to guarantee transient and final tracking accuracy. Then, a continuous differentiable friction model is utilized for feedforward compensation, reducing the designed conservativeness and improving the tracking performance. Moreover, robust terms suppress mismatched and matched disturbances and guarantee asymptotic stability. Adaptive dynamic surface control (ADSC) with nonlinear filters is adopted to reduce the burden of online calculation and improve control accuracy. As a result, a prescribed performance-based adaptive dynamic surface controller is proposed to achieve asymptotic tracking of a pump-controlled hydraulic system. The proposed control strategy is numerically verified and experimentally validated.

关键词： Adaptive dynamic surface control Pump-controlled hydraulic systems Asymptotic tracking Prescribed performance control Disturbances

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An Image-to-image Target Reconstruction Network for Capacitively Coupled Electrical Resistance Tomography Based on Transfer Learning

An Image-to-image Target Reconstruction Network for Capaciti...

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Computer, Vision and Intelligent technology (ICCVIT), International Conference on

作者： Chunfen Luo Yandan Jiang Vivo Mobile Communication Co. Ltd Hangzhou China State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Zhejiang University Hangzhou China

ISBN: (数字)9798331540043

ISBN: (纸本)9798331540050

This work develops an image-to-image target reconstruction network for capacitively coupled electrical resistance tomography. The novel target reconstruction network is constructed by two Unets to extract and fuse the multi-frequency features of the coarse images reconstructed by traditional image reconstruction algorithms, and incorporated with transfer learning to improve the generalization ability of the network. Experimental results show that the developed target reconstruction network is effective. The Unet-based image-to-image framework improves the target reconstruction quality with quantitatively higher image score. The introduced transfer learning strategy fills the gap between simulation data and experimental data, and further improves the performance of the network.

关键词： Resistance Computer vision Fluids Fuses Transfer learning Reconstruction algorithms Feature extraction Image reconstruction Image fusion

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Modeling and Heuristic Solutions for Storage Scheduling of Steel Plates in Steel Logistics Park

Modeling and Heuristic Solutions for Storage Scheduling of S...

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2023 China Automation Congress, CAC 2023

作者： Yang, Hao Wang, Jinlong Xu, Zhezhuang Chen, Boyu Zhang, Qingdong College of Electrical Engineering and Automation Key Laboratory of Industrial Automation Control Technology and Information Processing Fuzhou University Education Department of Fujian Province Fuzhou350000 China Sansteel Minguang Co. Ltd. Sanming353000 China

ISBN: (纸本)9798350303759

Steel plates are highly customized according to different customer demands. In this case, the outbound date, the specifications of the steel plates and the distribution of stacks must be simultaneously considered when the steel plates are stored in the yard. Improper storage of steel plates significantly increases the number of shuffles during outbound operations. To overcome the challenge, we propose an efficient steel plate storage scheme based on the actual scenario of existing steel plate distribution in the yard. Firstly, a model for steel plate storage scheduling is established to minimize the number of extra blocking plates. Then, three heuristic algorithms are designed to solve the problem. Comparative experiments are carried out to verify the effectiveness of the proposed algorithm. The experimental results show that the proposed method can sufficiently improve the efficiency of steel plates scheduling. © 2023 IEEE.

关键词： Heuristic algorithms

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Elevated efficiency in tartrazine removal from wastewater through boron-doped biochar:enhanced adsorption and persulfate activation

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Biochar 2024年第1期6卷 1408-1429页

作者： Xiaojuan Chen Yu Zhou Juhua He Suresh CPillai Ning Li Song Xu Jiesen Li Xin Chen Hailong Wang School of Environmental and Chemical Engineering Foshan UniversityFoshan 528225China. School of Food Science and Engineering Foshan UniversityFoshan 528225China. Nanotechnology Research Group Department of Environmental ScienceFaculty of ScienceInstitute of Technology SligoAsh LaneSligo F91 YW50Ireland. Guangdong Provincial Key Laboratory of Integrated Agro-Environmental Pollution Control and Management Institute of Eco-Environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China.

Boron-doped biochar(B-BC)was synthesized by pyrolysis using solid waste of sorghum straw as raw *** specific surface area of B-BC increased significantly by 2.38 times compared to that of pure *** enhancement allowed B-BC(0.3 g L^(−1))to achieve complete adsorption of 10 mg L^(−1)tartrazine(TTZ)within 40 ***,acidic conditions were more favorable for TTZ adsorption,achieving complete removal of TTZ in only 15 min at a pH of ***,the adsorption rate of TTZ by B-BC in the presence of 0.05 M Cl^(-)was approximately 2.12 times higher than that in the absence of Cl^(-).When other background electrolytes were present,excluding PO_(4)^(3−),complete adsorption of TTZ could also be achieved within 60 *** analysis and DFT calculations described the parameters of B-BC for TTZ adsorption,includingG(<0 kJ mol^(−1)),H(−2.199 kJ mol^(−1)),S(−6.068 J mol^(−1)K^(−1)),and the adsorption energy(E_(ads)=−0.6919 eV),indicating a tendency towards a spontaneous adsorption ***,the strong electron transfer ability of B-BC and the oxygen-containing groups promoted the activation of PDS and generation of active substances such as^(1)O_(2),O_(2)^(•−),and SO_(4)^(•−),thereby degrading TTZ into products with lower biological *** the added PDS was only 0.1 mM,the degradation rate constant of TTZ could reach 0.1481 min−***,boron doping enhanced the stability of biochar,enabling the complete removal of 10 mg L^(−1)TTZ even after recycling and *** summary,this study offers a practical solution for the resource utilization of solid waste sorghum straw and the treatment of TTZ-polluted wastewater.

关键词： Sorghum straw Boron doping DFT Degradation Wastewater treatment Peroxydisulfate

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StyleLoco: Generative Adversarial Distillation for Natural Humanoid Robot Locomotion

arXiv

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arXiv 2025年

作者： Ma, Le Meng, Ziyu Liu, Tengyu Li, Yuhan Song, Ran Zhang, Wei Huang, Siyuan National Key Laboratory of General Artificial Intelligence BIGAI School of Control Science and Engineering Shandong University China Huazhong University of Science and Technology China

Humanoid robots are anticipated to acquire a wide range of locomotion capabilities while ensuring natural movement across varying speeds and terrains. Existing methods encounter a fundamental dilemma in learning humanoid locomotion: reinforcement learning with handcrafted rewards can achieve agile locomotion but produces unnatural gaits, while Generative Adversarial Imitation Learning (GAIL) with motion capture data yields natural movements but suffers from unstable training processes and restricted agility. Integrating these approaches proves challenging due to the inherent heterogeneity between expert policies and human motion datasets. To address this, we introduce StyleLoco, a novel two-stage framework that bridges this gap through a Generative Adversarial Distillation (GAD) process. Our framework begins by training a teacher policy using reinforcement learning to achieve agile and dynamic locomotion. It then employs a multi-discriminator architecture, where distinct discriminators concurrently extract skills from both the teacher policy and motion capture data. This approach effectively combines the agility of reinforcement learning with the natural fluidity of human-like movements while mitigating the instability issues commonly associated with adversarial training. Through extensive simulation and real-world experiments, we demonstrate that StyleLoco enables humanoid robots to perform diverse locomotion tasks with the precision of expertly trained policies and the natural aesthetics of human motion, successfully transferring styles across different movement types while maintaining stable locomotion across a broad spectrum of command inputs. Copyright © 2025, The Authors. All rights reserved.

关键词： Anthropomorphic robots

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Effect of partial recrystallization on microstructure and tensile properties of NiFeCoCrMn high-entropy alloy

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Transactions of Nonferrous Metals Society of China 2022年第3期32卷 947-956页

作者： Hui DU Jia-hong CAI Ya-song WANG Jun-qing YAO Qiang CHEN Yu CUI Xin-wang LIU Key Laboratory of Metallurgical Equipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan 430081China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan 430081China Precision Manufacturing Institute Wuhan University of Science and TechnologyWuhan 430081China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Southwest Technology and Engineering Research Institute Chongqing 400039China

To obtain a balance between strength and ductility in NiFeCoCrMn high-entropy alloy, the degree of dislocation strengthening was tuned via partial recrystallization during traditional thermomechanical processing(cold rolling and recrystallization). The tensile properties in each state were then examined. Significant improvements in uniform elongation and work hardening rate, with decrease in yield strength and ultimate tensile strength, are associated with increase in the recrystallized fraction, i.e., reductions in the degree of strain hardening. In particular, recrystallized fractions of 37% and 74% are obtained by annealing at 650 ℃ for 10 min and 15 min, respectively, which results in yield strengths of 1003 MPa and 742 MPa and uniform elongations of 4% and 24%, respectively. The strengthening is due to the unrecrystallized grains with a high density of dislocations, whereas the ductility benefits from the presence of recrystallized strain-free grains.

关键词： high-entropy alloy partial recrystallization microstructure tensile property strengthening mechanism

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基于氧化钒的动态超表面

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Science China Materials 2023年第1期66卷 284-290页

作者：李月谢建良邓龙江彭波 National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of ChinaChengdu 611731China Key Laboratory of Multi Spectral Absorbing Materials and Structures of Ministry of Education University of Electronic Science and Technology of ChinaChengdu 611731China

动态调控是现代光学器件中必不可少的特性,在激光雷达系统、显示器件以及数码相机等设备中具有重要意义.与传统的体光学器件相比,动态超表面为实现小型化和集成化智能光学系统提供了一个极具吸引力的解决方案.相变材料具有高的折射率对... 详细信息

动态调控是现代光学器件中必不可少的特性,在激光雷达系统、显示器件以及数码相机等设备中具有重要意义.与传统的体光学器件相比,动态超表面为实现小型化和集成化智能光学系统提供了一个极具吸引力的解决方案.相变材料具有高的折射率对比度和易于操控的特性,是设计动态超表面的理想材料.本文通过操控氧化钒的相变,在近红外区域设计实现了可调谐的超构透镜和可切换图像编码的超表面器件.通过控制氧化钒的相变,能够改变超透镜的聚焦强度,实现强度对比约为12倍的开关聚焦效果.此外,利用氧化钒的相变还设计实现了任意两个不同数字图案的可切换成像.本工作为实现动态成像和光学加密系统的可调谐超表面奠定了基础.

关键词：光学加密光学器件激光雷达系统氧化钒动态调控图像编码动态成像显示器件

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A Robust Camera-LiDAR Fusion Framework for 3D Object Detection in High-Dust Environments

A Robust Camera-LiDAR Fusion Framework for 3D Object Detecti...

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IEEE International Conference on Industrial Informatics (INDIN)

作者： Mingyuan Wang Wentao Liu Bin Zhou Zhangyu Wang Runsen Liu Hanyu Wang Sate Key Lab of Intelligent Transportation System The Key Laboratory of Autonomous Transportation Technology for Special Vehickes Ministry of Industry and Information Technology School of Transportation Science and Engineering Beihang University Beijing China Technology and Development Center of Hefei Metro Research Institute Co. Ltd. Hefei Metro Research Institute Co. Ltd. Hefei China

ISBN: (数字)9798331527471

ISBN: (纸本)9798331527488

The fusion of camera and LiDAR features in the Bird's Eye View (BEV) perspective has become a prevalent solution for 3D detection in autonomous driving due to its simplicity and efficiency. However, in challenging environments like mining areas with dusty roads, existing BEV -based fusion networks struggle due to dust occlusion and misidentification of dust as obstacles. To address this, we propose a robust fusion framework that integrates fine-grained depth supervision and channel-wise attention mechanisms. Combined with a temporal multi-frame mechanism, our framework effectively mitigates issues caused by dust occlusion and misidentification. We validated our method's detection accuracy on a self-constructed mining road dataset, achieving 89.6% mAP, surpassing BEVFusion's 88.3% mAP. Tests on sensor occlusion and failure further demonstrated its robustness in adverse conditions typical of unstructured road scenarios.

关键词： Three-dimensional displays Attention mechanisms Laser radar Roads Channel estimation Object detection Feature extraction Robustness Informatics Autonomous vehicles

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