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ZIF-67@Cellulose nanofiber hybrid membrane with controlled porosity for use as Li-ion battery separator

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Journal of Energy Chemistry 2021年第1期30卷 170-180,I0006页

作者： Xiuxuan Sun wangwang xu Xiuqiang Zhang Tingzhou Lei Sun-Young Lee Qinglin Wu School of Renewable Natural Resources Louisiana State University AgCenterBaton RougeLA 70803United States Key Biomass Energy Laboratory of Henan Province Zhengzhou 450008HenanChina Forest Products Department National Institute of Forest Science57 HoegiroDongdaemun-guSeoul 02455Republic of Korea

Zeolitic imidazolate framework-67(ZIF-67) was synthesized on the surface of cellulose nanofibers(CNFs)in methonal to address the problems of unhomogeneous pore size and pore distribution of pure CNF membrane.A combination of Energy Dispersive X-Ray Spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS) and X-ray powder diffraction(XRD) patterns were used to determine the successful synthesis of ZIF-67@*** size of the ZIF-67 particles and pore size of the ZIF-67@CNF membrane were50-200 nm and 150-350 nm, *** prepared ZIF-67@CNF membrane exhibited excellent thermal stability,lower thermal shrinkage and high surface *** discharge capacity retention of the Li-ion batteries(LIBs) made with ZIF-67@CNF,glass fiber(GF),CNF and commercial polymer membranes after 100 th cycle at 0.5 C rate were 88.41%,86.22%,83.27%,and 81.03%,*** with ZIF-67@CNF membrane exhibited a better rate capability than these with other *** damage of porous structure or peel-off of ZIF-67 was observed in the SEM images of ZIF-67@CNF membrane after100 th *** improved cycling performance,rate capability,and good electrochemical stability implied that ZIF-67@CNFs membrane can be considered as a good alternative LIB separator.

关键词： Cellulose nanofibers ZIF-67 Li-ion battery Membrane property Battery performance

Water Evaporation Triggered Self-Assembly of MXene on Non-Carbonized Wood with Well-Aligned Channels as Size-Customizable Free-Standing Electrode for Supercapacitors

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Energy & Environmental Materials 2023年第5期6卷 347-354页

作者： Weimin Chen Zhao Li Feng Jiang Min Luo Kai Yang Daotong Zhang wangwang xu Chaozheng Liu Xiaoyan Zhou Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry University International Innovation Center for Forest Chemicals and Materials Jiangsu Engineering Research Center of Fast-growing Trees and Agri-fiber Materials Nanjing 210037China Sustainable Functional Biomaterials Laboratory Department of Wood ScienceThe University of British ColumbiaVancouver BC V6T 1Z4Canada School of Renewable Natural Resources Louisiana State University Agricultural CenterBaton Rouge LA 70803USA

Herein,non-carbonized wood-based electrodes and separators with well-aligned channels and excellent mechanical properties are developed for *** enhance the conductivity and boost the capacitance,Ti_(3)C_(2)(MXene)nanosheets with high electrical conductivity and excellent electrochemical activity are loaded into the wood cells via self-assembly triggered by fast evaporating water in Ti_(3)C_(2)*** the assistance of positive charged polydopamine microspheres with large surface area,the self-restacking of Ti_(3)C_(2)nanosheets can be avoided and the high mass loading(50 wt%)can be achieved due to the extra driving force for Ti_(3)C_(2)*** from the conductive Ti_(3)C_(2)nanosheets with massive active sites and the multiple well-aligned channels in wood with efficient transportation pathways for charge carriers,the as-designed free-standing electrode shows a large areal capacitance of 1060 mF cm^(-2)at 0.5 mA cm^(-2)and high capacitance retention of 67%at 10 mA cm^(-2).Also,this electrode is highly size-customizable,showing a good ability to be industrially processed into various shapes and ***,an all-wood based supercapacitor with Ti_(3)C_(2)/wood composites as two layers of electrodes and a wood slice as the separator is fabricated,presenting a high energy density of 10.5μW h cm^(-2)at 389.9μW cm^(-2).

关键词： free-standing electrode MXene nanosheets polydopamine microspheres supercapacitor wood slice with well-aligned channels

基于FS-SIA的毁伤预测神经网络超参数优化方法

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郑州大学学报（理学版） 2025年第2期57卷 1-7页

作者：佘维吕钟毓邢召伟王世豪徐旺旺田钊郑州大学网络空间安全学院河南郑州450002 嵩山实验室河南郑州450046 郑州市区块链与数据智能重点实验室河南郑州450002 河南省科技创新促进中心河南郑州450007

针对毁伤预测中神经网络超参数设置及调试过程较为复杂的问题,提出一种基于特征选择结合群体智能(feature selection and swarm intelligence algorithm,FS-SIA)的超参数优化方法,用于在毁伤预测中对神经网络进行超参数的搜索和优化。首... 详细信息

针对毁伤预测中神经网络超参数设置及调试过程较为复杂的问题,提出一种基于特征选择结合群体智能(feature selection and swarm intelligence algorithm,FS-SIA)的超参数优化方法,用于在毁伤预测中对神经网络进行超参数的搜索和优化。首先,通过多种特征排序方法确定毁伤特征的重要性,选取公共的特征偏序子集用于模型训练。其次,针对具体的神经网络模型,分别采用多种群体智能算法进行超参数的搜索和优化。最后,得出特征集性能最优的超参数训练模型。实验结果表明,相较于未经特征排序而单纯采用群体智能算法的其他超参数优化模型,所提方法在毁伤预测中具有更快的收敛速度和更高的准确率。

关键词：神经网络超参数优化特征选择群体智能毁伤预测

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隔震支座在混凝土框架结构中的运用研究

陶瓷 2023年第11期 192-194页

作者：许旺旺山西二建集团有限公司太原030000

隔震支座技术因其较好的减震效果,在高层建筑中受到广泛关注。笔者旨在探讨隔震支座在混凝土框架结构中的设计与应用。通过文献研究和案例分析,考察隔震支座的工作原理、设计要点、施工流程及工程效果。研究发现,隔震支座可有效减小地... 详细信息

隔震支座技术因其较好的减震效果,在高层建筑中受到广泛关注。笔者旨在探讨隔震支座在混凝土框架结构中的设计与应用。通过文献研究和案例分析,考察隔震支座的工作原理、设计要点、施工流程及工程效果。研究发现,隔震支座可有效减小地震反力,保护上部结构,并已在多类工程中广泛应用。其核心在于控制水平位移、增加结构周期、改善结构延性。笔者对隔震支座的设计施工提出了深化设计、精细施工等对策,丰富了工程应用经验。研究表明,隔震支座技术行之有效,可减轻地震灾害,值得推广应用。今后可进一步扩大工程应用范围,优化参数设计。

关键词：隔震支座混凝土框架结构减震设计施工工程应用

TransAS-UNet:融合Swin Transformer和UNet的乳腺癌区域分割

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中国图象图形学报 2024年第3期29卷 741-754页

作者：徐旺旺许良凤李博凯周曦律娜詹曙合肥综合性国家科学中心人工智能研究院合肥230601 合肥工业大学计算机与信息学院合肥230601 安徽水利电力职业技术学院合肥231603 安徽医科大学第一附属医院合肥230022

目的乳腺癌在女性中是致病严重且发病率较高的疾病,早期乳腺癌症检测是全世界需要解决的重要难题。如今乳腺癌的诊断方法有临床检查、影像学检查和组织病理学检查。在影像学检查中常用的方式是X光、CT(computed tomography)、磁共振等,... 详细信息

目的乳腺癌在女性中是致病严重且发病率较高的疾病,早期乳腺癌症检测是全世界需要解决的重要难题。如今乳腺癌的诊断方法有临床检查、影像学检查和组织病理学检查。在影像学检查中常用的方式是X光、CT(computed tomography)、磁共振等,其中乳房X光片已用于检测早期癌症,然而从本地乳房X线照片中手动分割肿块是一项非常耗时且容易出错的任务。因此,需要一个集成的计算机辅助诊断(computer aided diagnosis,CAD)系统来帮助放射科医生进行自动和精确的乳房肿块识别。方法基于深度学习图像分割框架,对比了不同图像分割模型,同时在UNet结构上采用了Swin架构来代替分割任务中的下采样和上采样过程,实现局部和全局特征的交互。利用Transformer来获取更多的全局信息和不同层次特征来取代短连接,实现多尺度特征融合,从而精准分割。在分割模型阶段也采用了Multi-Attention ResNet分类网络对癌症区域的等级识别,更好地对乳腺癌进行诊断医疗。结果本文模型在乳腺癌X光数据集INbreast上实现肿块的准确分割,IoU(intersection over union)值达到95.58%,Dice系数为93.45%,与其他的分割模型相比提高了4%~6%,将得到的二值化分割图像进行四分类,Accuracy值达到95.24%。结论本文提出的TransAS-UNet图像分割方法具有良好的性能和临床意义,该方法优于对比的二维图像医学分割方法。

关键词：乳腺癌深度学习医学图像分割 TransAS-UNet 图像分类

干旱区耕地质量等级评价及土壤养分与盐渍化的分析研究——以民勤绿洲为例

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干旱区地理 2021年第2期44卷 514-524页

作者：马倩倩董博许旺旺蔡立群武均甘肃农业大学资源与环境学院甘肃兰州730070 甘肃农业大学甘肃省干旱生境作物学重点实验室甘肃兰州730070

为整体掌握民勤绿洲耕地质量、土壤养分以及盐渍化状况等,充分利用县域耕地资源,分析研究民勤绿洲耕地质量等级划分及其耕地土壤养分和盐渍化现状,为及时准确掌握绿洲耕地地力状况提供科学依据,同时为绿洲耕地土壤养分、盐渍化障碍提供... 详细信息

为整体掌握民勤绿洲耕地质量、土壤养分以及盐渍化状况等,充分利用县域耕地资源,分析研究民勤绿洲耕地质量等级划分及其耕地土壤养分和盐渍化现状,为及时准确掌握绿洲耕地地力状况提供科学依据,同时为绿洲耕地土壤养分、盐渍化障碍提供改良措施。基于农业农村部《耕地质量调查监测与评价办法》(农业部2016年第2号)和《耕地质量等级》国家标准(GB/T33469-2016)的相关要求,构建民勤绿洲县域评价体系,通过综合运用空间分析、模糊数学、层次分析和综合指数等方法,对民勤绿洲耕地质量等级进行综合评价。结果表明:(1)民勤绿洲耕地质量平均等级为3.26等;分布有一至七等级地,八、九、十等级地没有分布;以三、四等级地为民勤绿洲耕地的主要等级分布,面积占比分别为31.63%、28.27%。泉山区中部和坝区灌溉农业区多分布一、二等级地。湖区灌溉区多分布三、四等地。在绿洲边缘带较多分布五、六、七等地。(2)民勤绿洲耕地土壤有机质平均含量在10.00~15.00 g·kg^(-1)之间,全氮平均含量在0.50~1.00 g·kg^(-1)之间,总体处于较低水平。有效磷和速效钾总体处于中等水平。昌宁区、泉山区与坝区交界东北部以及湖区镇(昌宁镇、东湖镇、南湖镇、泉山镇、西渠镇)耕地土壤养分平均含量较均低。(3)民勤绿洲盐渍化耕地的面积为32240.36 hm^(2),占民勤绿洲耕地总面积的30.09%;主要以轻度盐渍化为主。轻度盐渍化多分布在湖区红沙岗镇、红沙梁镇、西渠镇等镇;中度盐渍化分布在昌宁镇以及环河区沿风沙线一带。其评价结果对民勤绿洲耕地资源的科学管理和可持续利用以及绿洲农业的发展具有重要意义。

关键词：耕地质量等级评价层次分析法县域耕地资源管理信息系统民勤绿洲

Enantio-divergent C–H borylation with two different ligands from a single chiral source

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Science China Chemistry 2025年第1期68卷 226-232页

作者： Rongrong Du Senmiao xu State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences College of Material Chemistry and Chemical Engineering Key Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of Education Hangzhou Normal University University of Chinese Academy of Sciences

Reported here is an iridium-catalyzed enantio-divergent C（sp3）–H borylation of α-gem-dimethyl groups of trifluoromethyl ketone-derived hydrazones to construct a series of acyclic all-carbon quaternary stereocenters with a high level of chiral induction. Two different chiral bidentate boryl ligands from a common chiral source not only can switch the enantioselectivity but also are complementary in terms of the substrate scope.

关键词： asymmetric catalysis C–H borylation all-carbon quaternary stereocenters synthetic methods

Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders:progress of experimental models based on disease pathogenesis

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Neural Regeneration Research 2025年第2期20卷 354-365页

作者： Li xu Huiming xu Changyong Tang Department of Neurology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor *** date,no effective treatment exists as the exact causative mechanism remains ***,experimental models of neuromyelitis optica spectrum disorders are essential for exploring its pathogenesis and in screening for therapeutic *** most patients with neuromyelitis optica spectrum disorders are seropositive for IgG autoantibodies against aquaporin-4,which is highly expressed on the membrane of astrocyte endfeet,most current experimental models are based on aquaporin-4-IgG that initially targets *** experimental models have successfully simulated many pathological features of neuromyelitis optica spectrum disorders,such as aquaporin-4 loss,astrocytopathy,granulocyte and macrophage infiltration,complement activation,demyelination,and neuronal loss;however,they do not fully capture the pathological process of human neuromyelitis optica spectrum *** this review,we summarize the currently known pathogenic mechanisms and the development of associated experimental models in vitro,ex vivo,and in vivo for neuromyelitis optica spectrum disorders,suggest potential pathogenic mechanisms for further investigation,and provide guidance on experimental model *** addition,this review summarizes the latest information on pathologies and therapies for neuromyelitis optica spectrum disorders based on experimental models of aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders,offering further therapeutic targets and a theoretical basis for clinical trials.

关键词： aquaporin-4 experimental model neuromyelitis optica spectrum disorder pathogenesis

Reducing the measurement errors in nonadiabatic holonomic quantum computers

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 64-70页

作者： Guo-Fu xu Department of Physics Shandong University

Nonadiabatic holonomic quantum computers serve as the physical platform for nonadiabatic holonomic quantum *** quantum computation has entered the noisy intermediate-scale era, building accurate intermediate-scale nonadiabatic holonomic quantum computers is clearly necessary. Given that measurements are the sole means of extracting information, they play an indispensable role in nonadiabatic holonomic quantum computers. Accordingly, developing methods to reduce measurement errors in nonadiabatic holonomic quantum computers is of great importance. However, while much attention has been given to the research on nonadiabatic holonomic gates, the research on reducing measurement errors in nonadiabatic holonomic quantum computers is severely lacking. In this study, we propose a measurement error reduction method tailored for intermediate-scale nonadiabatic holonomic quantum computers. The reason we say this is because our method can not only reduce the measurement errors in the computer but also be useful in mitigating errors originating from nonadiabatic holonomic gates. Given these features,our method significantly advances the construction of accurate intermediate-scale nonadiabatic holonomic quantum computers.

关键词： quantum holonomy quantum computation measurement errors