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Review of Crashworthiness Studies on Cellular Structures

Automotive Innovation 2023年第3期6卷 379-403页

作者： Hongyu Liang Ying Zhao Shixian Chen Fangwu Ma Dengfeng Wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130022China College of Engineering and Technology Southwest UniversityChongqing 400715China Weichai Power Co. LtdWeifang 261061China

The application of lightweight structures with excellent energy absorption performance is crucial for enhancing vehicle safety and energy *** structures,inspired by the characteristics observed in natural organisms,have exhibited exceptional structural utilization in terms of energy absorption compared with traditional *** recent years,various innovative cellular structures have been proposed to meet different engineering needs,resulting in significant performance *** paper provides a comprehensive overview of novel cellular structures for energy absorption *** particular,it outlines the application forms and design concepts of cellular structures under typical loading conditions in vehicle collisions,including axial loading,oblique loading,bending loading,and blast *** structures have evolved to meet the demands of complex loading conditions and diverse research methods,focusing on achieving high-performance characteristics across multiple load ***,this review discusses manufacturing techniques and strate-gies for enhancing the manufacturing performance of cellular ***,current key challenges and future research directions for cellular structures are *** aim of this study is to provide valuable guidelines for researchers and engineers in the development of next-generation lightweight cellular structures.

关键词： Honeycomb Lattice structure Multi-cell tube Cellular structure filled tube Crashworthiness Multiple load cases

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Responses of microbial interactions to elevated salinity in activated sludge microbial community

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Frontiers of Environmental science & engineering 2023年第5期17卷 93-103页

作者： Tao Ya Zhimin Wang Junyu Liu Minglu Zhang Lili Zhang Xiaojing Liu Yuan Li Xiaohui Wang Beijing Engineering Research Center of Environmental Material for Water Purification College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China Puyang Vocational and Technical College Puyang 457000China

Biological treatment processes are critical for sewage purification,wherein microbial interactions are tightly associated with treatment *** studies have focused on assessing how environmental factors(such as salinity)affect the diversity and composition of the microbial community but ignore the connections among ***,we described the microbial interactions in response to elevated salinity in an activated sludge system by performing an association network *** was found that higher salinity resulted in low microbial diversity,and small,complex,more competitive overall networks,leading to poor performance of the treatment *** of major phyla(Proteobacteria,Bacteroidetes,and Chloroflexi)and functional bacteria(such as AOB,NOB and denitrifiers)differed substantially under elevated salinity *** with subnetworks of Nitrosomonadaceae,Nitrosomonas(AOB)made a greater contribution to nitrification under higher salinity(especially 3%)in the activated sludge *** established more proportion of cooperative relationships with other bacteria to resist 3%salinity ***,identified keystone species playing crucial roles in maintaining process stability were dynamics and less abundant under salinity *** gleaned from this study deepened our understanding of microbial interaction in response to elevated salinity in activated sludge systems.

关键词： Elevated salinity Activated sludge system Pollution removal Microbial interactions Competitive relationship

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Fabrication of La,Ce co-doped ZnO nanorods for improving photodegradation of methylene blue

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Journal of Rare Earths 2024年第1期42卷 76-83,I0003页

作者： Erfan Hakim Azmal Zaid Jin-Chung Sin Sze-Mun Lam Abdul Rahman Mohamed School of Chemical Engineering Universiti Sains Malaysia(USM)14300Nibong TebalPenangMalaysia College of Environmental Science and Engineering Guilin University of TechnologyGuilin541004China Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control Guilin University of TechnologyGuilin541004China Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area Guilin University of TechnologyGuilin541004China Faculty of Engineering and Green Technology Universiti Tunku Abdul RahmanJalan UniversitiBandar Barat31900KamparPerakMalaysia

La,Ce co-doped ZnO nanorods(ZnLC)were synthesized through a one-step solvothermal *** photocatalysts were characterized by X-ray diffraction,Raman spectroscopy,field-emission scanning electron microscopy,energy dispersive X-ray,transmission electron microscopy,UV-vis diffuse reflectance spectroscopy and photo luminescence *** La and Ce doping enhanced the visible light absorption ability of ZnLC and a red shift was detected for *** simulated solar light irradiation,the ZnO doped with 3 at%La and 1 at%Ce(ZnLC1)degrades methylene blue(MB)more effectively than those of pure ZnO,La-doped ZnO(ZnL)and commercially available *** improved photocatalytic performance of ZnLC1 can be attributed to the high charge separation efficiency as demonstrated by the photoluminescence ***,the photocatalytic experiments reveal that several parameters have their own impact on the MB *** a variety of radical scavengers,it is discovered that superoxide anion radical plays a crucial role in the degradation of *** ZnLC1 is also reused several times without noticeable decrease of photoactivity,indicating that it has a substantial potential for environmental remediation applications.

关键词： ZnO Lanthanum Cerium Co-doping Photodegradation Rare earths

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A comprehensive review of electro-tribological behavior in conductive lubricants

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Friction 2025年第4期13卷 17-45页

作者： Xiang Xi Zijie Zhao Hailong Li Wei Gu Wen Xie Wenyi Zhang Chih-An Lo Lin Xue Hongqiang Chu Linhua Jiang College of Civil and Transportation Engineering Hohai UniversityNanjing 210098 State Key Laboratory of High Performance Civil Engineering Materials Jiangsu Research Institute of Building Science Co.Ltd.Nanjing 210008China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China Department of Industrial and Systems Engineering University at BuffaloBuffaloNY 14260USA College of Materials Science and Engineering Hohai UniversityChangzhou 213000China

The electric machinery industry is currently facing a significant challenge in the application of electrical contact materials with appropriate electrical and tribological *** use of conductive lubricants,including liquid,solid,and semi-solid varieties,represents a key approach to meeting technical and sustainable *** strategy is closely linked to the development of multifunctional additives with excellent conduction properties in response to the growing concerns regarding the increased durability of electrical *** paper provides a comprehensive review of prior research in this area,specifically studies investigating conductive lubricants incorporating conductive additives and demonstrating exceptional electro-tribological *** conductive additives have been incorporated into these lubricants,each providing unique advantages,such as enhancing conductive connectivity,reducing friction and wear,and improving the dispersion of other functional *** review covers a range of conductive materials,including carbon-based materials(carbon nanotubes,graphene nanosheets,carbon black,etc.),ionic liquids(ILs),metals(soft metal-based composites,gallium-based liquid metals),MAX phases,semiconductors,and conductive polymers,and discusses their impact on the electrical conductivity and electro-tribological properties of conductive ***,the electro-tribological properties of insulating lubricants are *** conductive lubricants are identified based on comparisons of their electrical conductivity,coefficient of friction(COF),wear rate,and electrical contact resistance(ECR)under various current-carrying friction(CCF)*** conclusion,it is found that conductive lubricants effectively reduce friction and wear under current-carrying conditions,thus contributing to the advancement of the electrical machinery *** paper also outlines potential research directions in this field,pointin

关键词： conductive lubricants electro-tribological properties electric contact friction and wear conductivity

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Arbuscular mycorrhizal fungi regulate plant mineral nutrient uptake and partitioning in iron ore tailings undergoing eco-engineered pedogenesis

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Pedosphere 2024年第2期34卷 385-398页

作者： Zhen LI Songlin WU Yunjia LIU Qing YI Merinda HALL Narottam SAHA Junjian WANG Yuanfang HUANG Longbin HUANG College of Land Science and Technology China Agricultural UniversityBeijing 100193China Centre for Mined Land Rehabilitation Sustainable Minerals InstituteThe University of QueenslandBrisbaneQLD 4072Australia Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Excess available K and Fe in Fe ore tailings with organic matter amendment and water-deficiencies may restrain plant colonization and growth,which hinders the formation of eco-engineered soil from these tailings for sustainable and cost-effective mine site *** mycorrhizal(AM)fungi are widely demonstrated to assist plant growth under various unfavorable ***,it is still unclear whether AM symbiosis in tailings amended with different types of plant biomass and under different water conditions could overcome the surplus K and Fe stress for plants in Fe ore tailings,and if so,by what ***,host plants(Sorghum *** ***),either colonized or noncolonized by the AM fungi(Glomus spp.),were cultivated in lucerne hay(LH,C:N ratio of 18)-or sugarcane mulch(SM,C:N ratio of 78)-amended Fe ore tailings under well-watered(55%water-holding capacity(WHC)of tailings)or water-deficient(30%WHC of tailings)*** mycorrhizal colonization,plant growth,and mineral elemental uptake and partitioning were *** indicated that AM fungal colonization improved plant growth in tailings amended with plant biomass under water-deficient *** mycorrhizal fungal colonization enhanced plant mineral element uptake,especially P,both in the LH-and SM-amended tailings regardless of water ***,AM symbiosis development restrained the translocation of excess elements(i.e.,K and Fe)from plant roots to shoots,thereby relieving their *** AM fungal roles in P uptake and excess elemental partitioning were greater in LH-amended tailings than in SM-amended *** deficiency weakened AM fungal colonization and functions in terms of mineral element uptake and *** findings highlighted the vital role AM fungi played in regulating plant growth and nutrition status in Fe ore tailings technosol,providing an important basis for involvement of AM fungi in the eco-engineered pedo

关键词： Fe stress fungal symbiosis K stress mine site rehabilitation mycorrhizal colonization plant biomass amendment plant nutrition water deficiency

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Stacked Denoising Autoencoders Based Poisson Regression For Count Data Modeling 11

Stacked Denoising Autoencoders Based Poisson Regression For ...

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11th IEEE Data Driven control and Learning Systems Conference, DDCLS 2022

作者： Zhang, Xinmin Liu, Ying Song, Zhihuan Zhu, Zheren Wei, Chihang College of Control Science and Engineering Zhejiang University State Key Laboratory of Industrial Control Technology Hangzhou310027 China School of Information Science and Technology Hangzhou Normal University Hangzhou310027 China

ISBN: (数字)9781665496759

ISBN: (纸本)9781665496759

Data-driven virtual-sensors or soft-sensors are important tools for predicting quality variables or KPIs in many industrial processes. However, the existing virtual-sensors models are generally based on the assumption that the response variable or model error structure satisfies normality and homoscedasticity. But, in many practical applications, the response variable of interest is a nonnegative integer or count that we want to model or analyze based on a set of explanatory variables. The count data usually violate these assumptions and exhibit heteroscedasticity and skewed distribution. To model and analyze count data, this paper proposes a stacked denoising autoencoders-based Poisson regression (SDAE-PR) model. In SDAE-PR, the stacked denoising autoencoders are adopted to extract the high-level feature representation of the data, and Poisson regression is then performed on this representation. Unlike the conventional Poisson regression model which use hand-crafted features to build the model, SDAE-PR can extract high-level feature representations, which not only helps to improve the prediction accuracy of the Poisson regression model, but also is more robust to noise;In addition, SDAE-PR inherits the merits of Poisson regression that can ensure the non-negativity for the prediction of the response variable, which is a key for the count data modeling and analysis. The experimental results demonstrated that the proposed SDAE-PR model is more accurate than the other state-of-the-art methods in terms of prediction accuracy. © 2022 IEEE.

关键词： Forecasting

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FPGA-based Real-Time High-resolution Image Processing for rocket on-board processing 17

FPGA-based Real-Time High-resolution Image Processing for ro...

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17th IEEE International Conference on Computer Research and Development, ICCRD 2025

作者： Zhou, Hui Wang, Xiaofeng Xie, Yujia Cao, Yongxiang Tang, Yu Huo, Yongchun Wen, Huan Zhao, Xiongbo Li, Chaoran National Key Laboratory of Science and Technology on Aerospace Intelligent Control Beijing Aerospace Automatic Control Institute Beijing China Beihang University Computer Science and Engineering Beijing China Beihang University National Superior College for Engineers Beijing China

ISBN: (纸本)9798331531881

The structure of the rocket-borne model is inherently complex, with processed images exhibiting high resolution and generating substantial amounts of data and calculations. Achieving robust real-Time computing on an embedded platform poses significant challenges due to strictly limited resources, power consumption constraints, and size limitations. Our review of rocket-borne applications reveals considerable variability in the design resources of different devices, indicating a need for expanded design approaches. Upon evaluating existing methods, we identified two primary drawbacks. First, certain operators within the high-resolution target detection model are difficult to parallelize, resulting in significant inference delays that hinder the ability to meet task requirements. Although existing methods have been extended, there remains significant potential for performance enhancement in core scheduling for poor acceleration. This paper proposes an optimized architecture for the target detection algorithm accelerator designed for high-resolution images, along with a novel highly parallel data pre-processing and post-processing module implemented on FPGA to address these issues. Compared to the ARM implementation, this architecture demonstrates an improved performance of 24.64x. Furthermore, to ensure flexible application across various rocket launch scenarios, we introduce an optimization structure for convolution, pooling, and fusion operators and a multi-core expansion optimization method. This approach yields a 1.29x improvement in computing unit utilization compared to state-of-The-Art multi-core scaling efforts. Finally, we assessed the accelerator architecture across multiple FPGA platforms, achieving a peak processing element utilization rate of 99.71% for a single core and layer. The overall computing efficiency, excluding the first layer, exceeded 90%. The peak computing power for the four cores reached 1638.4 GOPS, and the end-To-end computation time for

关键词： Image enhancement

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SMA-MVS: Segmentation-Guided Multi-Scale Anchor Deformation Patch Multi-View Stereo

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IEEE Transactions on Circuits and Systems for Video technology 2025年第6期35卷 5724-5737页

作者： Yin, Yufeng Liu, Xiaoyan Zhang, Zichao Hunan University National Engineering Laboratory for Robot Visual Perception and Control Technology College of Electrical and Information Engineering Changsha410082 China Innovation Institute of Industrial Design and Machine Intelligence Quanzhou-Hunan University Quanzhou362006 China Zoomlion Heavy Industry Science and Technology Company Ltd. Changsha410082 China

Multi-view stereo aims to recover the 3D model of a scene from a set of images. However, low-textured areas in the scene have always been a challenge in 3D reconstruction. In this work, we propose a segmentation-guided multi-scale anchor deformation patch multi-view stereo. Specifically, we use the Segment Anything Model to distinguish different instances in the scene, and propose an anchor deformation strategy guided by segmentation to adaptively generate a multi-scale anchor patch, so that the depth can be refined from coarse to fine scales. To propagate a better hypothesis for low-textured areas where photometric consistency is unreliable, we propose a non-local adaptive propagation scheme by using the segmented mask as a propagation domain. In order to reduce the interference of illumination on reconstruction completeness, we propose an outlier depth cost refinement guided by reliable points that improves the performance of depth estimation in unevenly illuminated areas. As a result, our method achieves state-of-the-art performance among traditional methods and exhibits better generalization capabilities on the ETH3D, Tanks and Temples, and DTU datasets. © 1991-2012 IEEE.

关键词： Image segmentation

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Efficient hydrogenolysis of fructose to 1,2-propanediol over bifunctional Ru-WO_(x)-MgO_(y) catalysts under mild reaction conditions via enhancing the chemoselective cleavage of C-C bonds

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Journal of Energy Chemistry 2024年第5期92卷 311-321页

作者： Shuang Luo Tie Shu Min Mao Haijie Yu Yuxin Zheng Daqian Ding Lingmei Liu Kexin Yao Jianjian Wang School of Chemistry and Chemical Engineering State Key Laboratory of Coal Mine Disaster Dynamics and ControlInstitute of Advanced Interdisciplinary StudiesMulti-scale Porous Materials CenterChongqing UniversityChongqing 401331China Key Laboratory for Efficient Conversion and Circular Economy of Coal Chemical Engineering CollegeInner Mongolia University of TechnologyHohhot 010051Inner MongoliaChina

Selective conversion of fructose to 1,2-propanediol(1,2-PDO)is considered as a sustainable and cost-effective alternative to petroleum-based processes,however,this approach still faces challenges associated with low efficiency and harsh reaction ***,we have successfully synthesized a novel bifunctional Ru-WO_(x)-MgO_(y) catalyst through a facile'one-pot'solvothermal ***,this catalyst exhibits exceptional catalytic performances in the conversion of fructose to 1,2-PDO under mild reaction *** yield of 1,2-PDO is up to 56.2%at 140°C for 4 h under an ultra-low hydrogen pressure of only 0.2 MPa,surpassing the reported results in recent literature(below 51%).Comprehensive characterizations and density functional theory(DFT)calculations reveal that the presence of oxygen vacancies in the Ru-WO_(x)-MgO_(y) catalyst,serving as active acidic sites,facilitates the chemoselective cleavage of C-C bonds in fructose,which leads to the generation of active intermediates and ultimately resulted in the high yield of 1,2-PDO.

关键词： Biomass Fructose 1,2-Propanediol Retroaldol condensation Heterogenous catalysis

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Instability energy mechanism of super-large section crossing chambers in deep coal mines

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International Journal of Mining science and technology 2022年第5期32卷 1075-1086页

作者： Deyuan Fan Xuesheng Liu Yunliang Tan Xuebin Li Purev Lkhamsuren College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Mining Disaster Prevention and Control Shandong University of Science and TechnologyQingdao 266590China School of Geology and Mining Mongolian University of Science and TechnologyUlaanbaatar 120646Mongolia

The stress concentration and failure at chamber intersections in coal mine are intense,especially in deepburied,super-large section *** this paper,the plastic radius of super-large section chamber under unequal pressure was corrected on the basis of the size ***,stress and failure evolution of intersections under different crossing angles and equivalent angular bisectors were ***,2 trajectory curves of failure and stress were analytically expressed,which divided the intersection into 5 influencing zones in the light of stress superposition *** determining instability trigger point and instability path,instability energy criterion of intersection can be obtained as K>1,which means that the external energy is greater than the sum of energy consumed by surrounding rock instability and supporting structure *** coal-gangue separation system of Longgu Coal Mine as example,it was found that there was instability risk under original *** long-term stability,an optimization design method was proposed by considering safety factor,and optimal support scheme was *** monitoring showed intersections deformations were relatively small with the maximum of 125 mm,which verified the rationality of theoretical *** study provides guidance for the stability control of the intersections under the same or similar conditions.

关键词： Super-large section Intersection Instability energy mechanism Optimization design Field monitoring

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