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Deep learning-based semantic segmentation of human features in bath scrubbing robots

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Biomimetic Intelligence & Robotics 2024年第1期4卷 70-79页

作者： chao zhuang Tianyi Ma Bokai Xuan Cheng Chang Baichuan An Minghuan Yin Hao Sun School of Artificial Intelligence and Data Science Hebei University of TechnologyTianjin 300401China Engineering Research Center of Intelligent Rehabilitation Device and Detection Technology Ministry of EducationTianjin 300401China

With the rise in the aging population,an increase in the number of semidisabled elderly individuals has been noted,leading to notable challenges in medical and healthcare,exacerbated by a shortage of nursing *** study aims to enhance the human feature recognition capabilities of bath scrubbing robots operating in a water fog *** investigation focuses on semantic segmentation of human features using deep learning ***,3D point cloud data of human bodies with varying sizes are gathered through light detection and ranging to establish human ***,a hybrid filtering algorithm was employed to address the impact of the water fog environment on the modeling and extraction of human ***,the network is refined by integrating the spatial feature extraction module and the channel attention module based on *** results indicate that the algorithm adeptly identifies feature information for 3D human models of diverse body sizes,achieving an overall accuracy of 95.7%.This represents a 4.5%improvement compared with the PointNet network and a 2.5%enhancement over mean intersection over *** conclusion,this study substantially augments the human feature segmentation capabilities,facilitating effective collaboration with bath scrubbing robots for caregiving tasks,thereby possessing significant engineering application value.

关键词： 3D point cloud Human model LiDAR Semantic segmentation

Pumping-induced Well Hydraulics and Groundwater Budget in a Leaky Aquifer System with Vertical Heterogeneity in Aquitard Hydraulic Properties

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 477-490页

作者： zhuang chao LÜChenyang YAN Long LI Yabing ZHOU Zhifang WANG Jinguo DOU Zhi Walter A.ILLMAN School of Earth Sciences and Engineering Hohai UniversityNanjing 211100China School of Geography Earth and Environmental SciencesUniversity of BirminghamBirmingham B152TTU.K. Department of Modern Mechanics University of Science and Technology of ChinaHefei 230027China Department of Earth and Environmental Sciences University of WaterlooOntario N2L 3G1Canada

In groundwater hydrology,aquitard heterogeneity is often less considered compared to aquifers,despite its significant impact on groundwater hydraulics and groundwater resources evaluation.A semi-analytical solution is derived for pumping-induced well hydraulics and groundwater budget with consideration of vertical heterogeneity in aquitard hydraulic conductivity(K)and specific storage(S_(s)).The proposed new solution is innovative in its partitioning of the aquitard into multiple homogeneous sub-layers to enable consideration of various forms of vertically heterogeneous K or S_(s).Two scenarios of analytical investigations are explored:one is the presence of aquitard interlayers with distinct K or S_(s) values,a common field-scale occurrence;another is an exponentially depth-decaying aquitard S_(s),a regional-scale phenomenon supported by statistical *** investigations reveal that a low-K interlayer can significantly increase aquifer drawdown and enhance aquifer/aquitard depletion;a high-S_(s) interlayer can noticeably reduce aquifer drawdown and increase aquitard *** of low-K or high-S_(s) interlayers also significantly impact well hydraulics and groundwater *** the context of an exponentially depth-decaying aquitard S_(s),a larger decay exponent can enhance aquifer *** using current models with a vertically homogeneous aquitard,half the sum of the geometric and harmonic means of exponentially depth-decaying aquitard S_(s) should be used to calculate aquitard depletion and unconfined aquifer leakage.

关键词： hydrogeology aquitard vertical heterogeneity semi-analytical solution well hydraulics groundwater budget

Review on recent advances of inorganic electrode materials for potassium-ion batteries

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Tungsten 2024年第1期6卷 174-195页

作者： Jian-Zhen Xiong Ze-Cheng Yang Xin-Liang Guo Xi-Ying Wang chao Geng Zong-Fu Sun An-Yong Xiao Quan-chao zhuang Ya-Xin Chen Zhi-Cheng Ju School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China

Rechargeable potassium-ion batteries(PIBs)have great potential in the application of electrochemical energy storage devices due to the low cost,the abundant resources and the low standard reduction potential of *** electrode materials are the key factors to determine the electrochemical performance of devices,relevant research is being carried out to build high-performance *** recent years,significant progress has been made in the study of the design of inorganic electrode ***,we review the cathode materials(Prussian blue and its analogues,layered oxides and poly anionic compounds)and the anode materials(antimony-based,selenium-based and bismuth-based compounds).On the basis of previous work,the structural design principles for improving the performance of electrode materials are reasonably *** the same time,the problems that need to be solved in the preparation of electrode materials and the direction of future research and improvement are pointed out.

关键词： Inorganic electrode materials Potassium-ion batteries Cathode materials Anode materials

A lithium–tin fluoride anode enabled by ionic/electronic conductive paths for garnet-based solid-state lithium metal batteries

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Rare Metals 2024年第2期43卷 575-587页

作者： Lei Zhang Qian-Kun Meng Xiang-Ping Feng Ming Shen Yu-Qing Zhang Quan-chao zhuang Run-Guo Zheng Zhi-Yuan Wang Yan-Hua Cui Hong-Yu Sun Yan-Guo Liu School of Materials Science and Engineering Northeastern UniversityShenyang110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao066004China School of Materials and Physics China University of Mining&TechnologyXuzhou221116China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang621900China

The high energy density and stability of solid-state lithium metal batteries(SSLMBs)have garnered great ***-type oxides,especially Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO),with high ionic conductivity,wide electrochemical window,and stability to Li metal anode,are promising solid-state electrolyte(SSEs)materials for ***,Li/LLZTO interface issues including high interface resistance,inhomogeneous Li deposition,and Li dendrite growth have hindered the practical application of ***,a multi-functional Li–SnF_(2) composite anode with Li,LiF,and Li-Sn alloy was specifically designed and *** composite anode improves the wettability to LLZTO,constructing an intimate contact interface between it and ***,ionic/electronic conductive paths in situ formed at the interface can effectively uniform Li deposition and suppress Li *** solid-state symmetric cell exhibits low interface resistance(11Ω·cm^(2)) and high critical current density(1.3 mA·cm^(−2))at 25℃.The full SSLMB based on LiFePO_(4) or LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode also shows stable cycling performance and high rate *** work provides a new composite anode strategy for achieving high-energy density and high-safety SSLMBs.

关键词： Solid-state lithium metal batteries(SSLMBs) Lithium-tin fluoride anode Ionic/electronic conductive Interface resistance Lithium dendrite

基于最优尺度地理探测的长三角有机污染物时空分布驱动因素分析

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环境科学 2024年第6期45卷 3480-3492页

作者：何金珂周亚男陈跃红庄超李润羌河海大学水文水资源学院南京210010 河海大学地球科学与工程学院南京210010 中科星图慧安科技有限公司广州510070

场地污染对人体健康和生态环境造成了严重危害,理解其时空分布规律是污染评估和场地修复的基础.为此基于场地采样数据,利用最优尺度地理探测器分析长三角地区有机污染物时空分布规律及其驱动因素.结果表明:①长三角场地有机污染物空间... 详细信息

场地污染对人体健康和生态环境造成了严重危害,理解其时空分布规律是污染评估和场地修复的基础.为此基于场地采样数据,利用最优尺度地理探测器分析长三角地区有机污染物时空分布规律及其驱动因素.结果表明:①长三角场地有机污染物空间分布存在显著的尺度效应,其最佳地理探测尺度格网为8 000 m;②长三角污染物空间分布的主控因子最主要来源于生物场,其次来源于化学场;③在土壤0~20 cm深度,蔗糖酶含量、脲酶含量、微生物量氮、全氮含量和离子交换量等对有机污染物空间分布的解释力较大.在土壤20~40 cm深度,对有机污染物空间分布解释力较强的因子是土壤湿度、人口和全氮含量等.随着土壤深度的加深,水动力场的因子解释力增强.④春季里人口、全氮含量和多酚氧化酶含量等对有机污染物空间分布解释力较强.秋季里有机污染物的空间分布更复杂,因子之间表现出更强烈的非线性增强现象和双因子增强现象.

关键词：有机污染场地驱动因素地理探测器最优尺度长三角

“去欧美化”:新中国史学早期转向的另一种解读

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淮阴师范学院学报（哲学社会科学版） 2024年第2期46卷 155-161,216页

作者：刘永祥庄超中国海洋大学马克思主义学院山东青岛266003

“去欧美化”是新中国史学早期转向的主要路径和基本原则之一,对此后的史学变化具有原生意义。这一转向由中国共产党主导完成,既通过重建史学机制来完成史学主体力量的权力转换,又采取“大批判”加“大讨论”双管齐下的方式,清除以自由... 详细信息

“去欧美化”是新中国史学早期转向的主要路径和基本原则之一,对此后的史学变化具有原生意义。这一转向由中国共产党主导完成,既通过重建史学机制来完成史学主体力量的权力转换,又采取“大批判”加“大讨论”双管齐下的方式,清除以自由主义为根基的“学术独立”意识。在当时的史学话语体系中,“去欧美化”和“反帝”“批判资产阶级史学”之间存在语义上的一致性。贯穿其间的,则是更具普遍意义的阶级斗争话语。史学“去欧美化”又被赋予世界意义,表现为追随苏联史学界与欧美史学界展开话语权的争夺。这次史学转向服务于社会主义理想,其性质因超出学术范畴而产生简单化、过度化等弊端。作为一种政治策略,它的破坏效果极其明显,但破坏之后的建设也卓有成效,成功扭转了重考证轻理论、重微观轻宏观、重学术轻致用、重事实轻规律等学风,并把理论原则落脚到中国历史本身,从而把中国史学研究推进到新的阶段。

关键词：新中国史学 “去欧美化” 马克思主义史学本土化

弱透水层瞬态水力参数的地质统计反演识别研究

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地质学报 2024年第1期98卷 324-331页

作者：庄超余文平严龙张健翼窦智杨蕴周志芳王锦国河海大学地球科学与工程学院江苏南京211100 水利部交通运输部国家能源局南京水利科学研究院江苏南京210029

弱透水层释水变形伴随着水力参数(渗透系数K和贮水率Ss)的瞬态变化,传统的“移动窗口”式反演方法假定每个反演窗口的初始状态是静态的,这与弱透水层释水变形存在明显滞后效应的实际情况不符。本文提出了在高维参数反演优化情境下,时间... 详细信息

弱透水层释水变形伴随着水力参数(渗透系数K和贮水率Ss)的瞬态变化,传统的“移动窗口”式反演方法假定每个反演窗口的初始状态是静态的,这与弱透水层释水变形存在明显滞后效应的实际情况不符。本文提出了在高维参数反演优化情境下,时间域上模型参数的动态变化可与空间域上模型参数的一维非均质性等价,因而可用地质统计反演方法可用于识别弱透水层瞬态K和Ss的新思路,实现了该方法在水文地质领域的创新性应用。以上海越流含水层系统为例,运用似线性地质统计反演算法,高精度地拟合了F16分层标处的长观变形数据,获取了原位透镜体状弱透水层K和Ss的瞬态特征。反演结果显示,观测时段内K的变幅为1.02×10^(-5)~5.89×10^(-4)m/a,平均值为1.38×10^(-4)m/a,Ss的变幅为4.34×10^(-4)~6.02×10^(-3)m^(-1),平均值为2.65×10^(-3)m^(-1)。基于反演所得参数瞬态特征,分析原位弱透水层在1994年前后分别以弹性和塑性变形为主,弱透水层K呈现与含水层水位相反的季节性变化特征,该现象可能与渗流力作用下细粒物质在含水层与弱透水层透镜体交界面附近的对孔隙的阻塞和疏通作用有关。该方法可获取完整观测时段内水文地质参数的动态变化轨迹,在计算评价地表水-地下水交互领域的河床渗透性、原位修复领域的渗透反应墙渗透性等的动态演化特征方面具有潜在的应用价值,并可作为构建水文地质领域、岩土工程等领域有关本构模型的有效辅助手段。

关键词：弱透水层瞬态水力参数地质统计反演时空等价性

Non-Darcy flows in layered porous media(LPMs)with contrasting pore space structures

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Petroleum Science 2022年第5期19卷 2004-2013页

作者： Xue-Yi Zhang Zhi Dou Jin-Guo Wang Zhi-Fang Zhou chao zhuang School of Earth Sciences and Engineering Hohai UniversityNanjing 210098JiangsuChina

Compared to single layer porous media,fluid flow through layered porous media(LPMs)with contrasting pore space structures is more *** study constructed three-dimensional(3-D)pore-scale LPMs with different grain size ratios of 1.20,1.47,and *** flow behavior in the constructed LPMs and single layer porous media was numerically investigated.A total of 178 numerical experimental data were collected in LPMs and single layer porous *** all cases,two different flow regimes(i.e.,Darcy and Non-Darcy)were *** influence of the interface of layers on Non-Darcy flow behavior in LPMs was analyzed based pore-scale flow *** was found that the available correlations based on single layer porous media fail to predict the flow behavior in LPMs,especially for LPM with large grain size *** effective permeability,which incorporated the influence of the interface is more accurate than the Kozeny-Carman equation for estimating the Darcy permeability of *** inertial pressure loss in LPMs,which determines the onset of the Non-Darcy flow,was underestimated when using a power law expression of mean grain *** constant B,an empirical value in the classical Ergun equation,typically equals *** inertial pressure loss in LPMs can be significantly different from it in single lager porous *** Non-Darcy flow in LPMs,it is necessary to consider a modified larger constant B to improve the accuracy of the Ergun empirical equation.

关键词： Non-Darcy flow Layered porous media Heterogeneity Forchheimer equation Simulations

Significant effect of ordered micro-domain on cell boundary phase distribution and demagnetization curve squareness of Sm_(2)Co_(17)-type magnet

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Rare Metals 2024年第4期43卷 1724-1735页

作者： zhuang Liu Hai-Chen Wu chao-Yue Zhang chao-Qun Zhu Guo-Xin Chen Huan-Ming Lu Ren-Jie Chen Aru Yan CISRI&NIMTE Joint Innovation Center for Rare Earth Permanent Magnets Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China University of Chinese Academy of Sciences Beijing100049China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China

Cu-rich cell boundary phase is difficult to precipitate evenly,resulting in a generally poor demagnetization curve squareness for Fe-rich Sm_(2)Co_(17)-type magnet,which is a key factor limiting the further improvement of magnetic energy *** this study,we report that nanoscale strip-like ordered micro-domains distributed in1:7H disordered matrix phase of the solid solution precursor is a new factor significantly affecting the precipitation and distribution of the cell boundary *** strip-like and continuous micro-twin structure with twin boundaries neatly perpendicular to the C-axis is observed after sintering *** solution treatment,sequential and long strip-like micro-twins gradually transform into disordered state along the basal plane,forming narrow disordered 1:7H(TbCu_(7)-type structure)phase between the separated strip-like ordered *** disordering transformation takes place via broken down of the long strip-like ordered micro-domains,which is accomplished by narrowing along the width direction followed by reduction of the ***,a new model revealing the effect of the ordered micro-domains on the formation of the cell boundary phase is *** boundaries enriched in Cu have already existed in the precursor with long strip-like ordered ***,the Cu-rich cell boundary phase acting as strong pinning centers cannot be precipitated homogeneously and distributed continuously after aging,resulting in a poor demagnetization curve squareness of Sm_(2)Co_(17)-type *** results indicate that significant broken down of the nanoscale ordered micro-domains in solution precursor is the key factor improving the distribution of cell boundary phase in Sm_(2)Co_(17)-type magnets.

关键词： Sm_(2)Co_(17) magnets Solution precursor Ordered micro-domains Disordering transformation Cellular structure