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Screen printing fabricating patterned and customized full paper-based energy storage devices with excellent photothermal,self-healing,high energy density and good electromagnetic shielding performances

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Journal of Materials Science & Technology 2022年第2期97卷 190-200页

作者： Chuanyin Xiong Mengrui Li qing Han Wei Zhao Lei Dai Yonghao ni College of Bioresources Chemistry&Materials Engineering Shaanxi University of Science and TechnologyShaanxi Prov Key Lab Papermaking Technol&SpeciaXi’an 710021China University of New Brunswick Limerick Pulp&Paper CtrFrederictonNB E3B 5A3Canada

Supercapacitors are favored by researchers because of their high power density,especially with the acceleration of people’s life ***,their energy density,especially from the point of view of the whole energy storage device,is far lower than that of commercial *** this work,a kind of customizable full paper-based supercapacitor device with excellent self-healing ability is fabricated by simple and low-cost screen printing,electropolymerization and dip coating *** resultant separatorfree supercapacitor device exhibits both ultrahigh gravimetric and areal specific energy(power)densities of 39 Wh kg^(-1)(69 k W kg^(-1))and 692μWh cm^(-2)(236 m W cm^(-2)),achieving excellent supercapacitor ***,the addition of vitrimers endows the whole device with outstanding self-healing properties,which is helpful for enhancing the adaptability of the device to the *** addition,this kind of paper-based device also displays good photothermal and electromagnetic shielding *** striking features make paper matrix composites attractive in the fields of supercapacitors,medical photothermal treatment and electromagnetic shielding.

关键词： Customizable full paper-based supercapacitors Energy density Self-healing Photothermal Electromagnetic shielding

Cryptic diversity and rampant hybridization in annual gentians on the qinghai-Tibet Plateau revealed by population genomic analysis

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Plant Diversity 2024年第2期46卷 194-205页

作者： Peng-Cheng Fu Qiao-Qiao Guo Di Chang qing-Bo Gao shan-shan Sun School of Life Science Luoyang Normal UniversityLuoyang 471934PR China Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXining 810001PR China

Understanding the evolutionary and ecological processes involved in population differentiation and speciation provides critical insights into biodiversity formation. In this study, we employed 29,865 single nucleotide polymorphisms(SNPs) and complete plastomes to examine genomic divergence and hybridization in Gentiana aristata, which is endemic to the qinghai-Tibet Plateau(QTP) region. Genetic clustering revealed that G. aristata is characterized by geographic genetic structures with five clusters(West, East, Central, South and North). The West cluster has a specific morphological character(i.e., blue corolla) and higher values of FSTcompared to the remaining clusters, likely the result of the geological barrier formed by the Yangtze River. The West cluster diverged from the other clusters in the Early Pliocene;these remaining clusters diverged from one another in the Early Quaternary. Phylogenetic reconstructions based on SNPs and plastid data revealed substantial cyto-nuclear conflicts. Genetic clustering and D-statistics demonstrated rampant hybridization between the Central and North clusters,along the Bayankala Mountains, which form the geological barrier between the Central and North clusters. Species distribution modeling demonstrated the range of G. aristata expanded since the Last Interglacial period. Our findings provide genetic and morphological evidence of cryptic diversity in G. aristata, and identified rampant hybridization between genetic clusters along a geological *** findings suggest that geological barriers and climatic fluctuations have an important role in triggering diversification as well as hybridization, indicating that cryptic diversity and hybridization are essential factors in biodiversity formation within the QTP region.

关键词： Gentiana aristata Hybrid zone qinghai-Tibet Plateau Plastome Nuclear SNPs

Dynamic Mechanical Behavior and Hypervelocity Impact Performance of an Al-Based Nanocrystalline Alloy

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Acta Metallurgica Sinica(English Letters) 2017年第12期30卷 1169-1176页

作者： shan-shan Deng Gang Wang Run-qing Chi Bao-Jun Pang Dong-Jun Wang Jun Shen School of Materials Science and Engineering Harbin Institute of Technology Harbin China Laboratory for Microstructures Institute of MaterialsShanghai University Shanghai China National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Harbin China Key Laboratory of Micro-Systems and Microstructures Manufacturing Ministry of Education Harbin China School of Materials Science and Engineering Tongji University Shanghai China

In a wide strain rate range from 10^-5 to 10^3s^-1, the deformation behavior of an Al-based nanocrystalline alloy was investigated. After fracture, the debris collected was used for statistical analysis, which is expected to reflect the profile of the fracture behavior of the alloy. The energy absorption of alloy at different strain rates was elucidated on account of mass distribution of debris. Based on the parameters obtained by the compression experiment at different strain rates, the numerical simulation experiment was carried out to evaluate the performance of Al-based nanocrystalline alloy as spacecraft shielding. The results suggest that Al-based nanocrystalline alloys have better shield performance than alu- minum alloy under the identical areal density at velocity of 1-7 km/s. The better shield performance is attributed to high fracture strength, high hardness and low toughness of Al-based nanocrystalline alloy as compared with those of aluminum alloy.

关键词： Nanostructure material Sintering Mechanical properties Computer simulation Spacecraft shielding

Combustion Characteristics and Kinetics of Anthracite Blending with Pine Sawdust

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Journal of Iron and Steel Research International 2015年第9期22卷 812-817页

作者： Guo-qing LIU qing-cai LIU Xiao-qing WANG Fei MENG shan REN Zhen-peng JI College of Materials Science and Engineering Chongqing University

The combustion characteristics and kinetics of anthracite,pine sawdust and their blends were investigated under combustion condition by thermogravimetric analysis,*** fractions of pine sawdust in the blended samples were set to be 30%,50%,and 80%.The results showed that the ignition and burnout temperatures of pine sawdust were lower and the maximum combustion rate was higher than those of *** the increase of pine sawdust content,the ignition temperature and burnout temperature of the blends decreased,while the maximum mass loss rate and the combustible index of the blends increased;that is,the comprehensive combustion property became *** kinetic parameters for the blends combustion under air condition were calculated based on experimental results using Coats-Redfern *** the pine sawdust content varied in the range of 30%-80%,the combustion processes of these blends could be divided into two stages and the combustion reactions belong to the first-order *** values of apparent activation energy at two individual stages decreased from 68.78to47.28kJ·mol-1 and from 113.53 to 46.43kJ·mol-1,respectively.

关键词： pine sawdust anthracite thermogravimetric analysis combustion characteristics apparent activation energy

Robust Text Detection in Natural Scenes Using Text Geometry and Visual Appearance

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International Journal of Automation and computing 2014年第5期11卷 480-488页

作者： Sheng-Ye Yan Xin-Xing Xu qing-shan Liu School of Information and Control Nanjing University of Information Science and Technology School of Computer Engineering Nanyang Technological University

This paper proposes a new two-phase approach to robust text detection by integrating the visual appearance and the geometric reasoning rules. In the first phase, geometric rules are used to achieve a higher recall rate. Specifically, a robust stroke width transform(RSWT) feature is proposed to better recover the stroke width by additionally considering the cross of two strokes and the continuousness of the letter border. In the second phase, a classification scheme based on visual appearance features is used to reject the false alarms while keeping the recall rate. To learn a better classifier from multiple visual appearance features, a novel classification method called double soft multiple kernel learning(DS-MKL) is proposed. DS-MKL is motivated by a novel kernel margin perspective for multiple kernel learning and can effectively suppress the influence of noisy base kernels. Comprehensive experiments on the benchmark ICDAR2005 competition dataset demonstrate the effectiveness of the proposed two-phase text detection approach over the state-of-the-art approaches by a performance gain up to 4.4% in terms of F-measure.

关键词： Text detection geometric rule stroke width transform (SWT) support vector machine (SVM) multiple kernel learning (MKL)

Effects of Phosphorus Application in Different Soil Layers on Root Growth, Yield, and Water-Use Efficiency of Winter Wheat Grown Under Semi-Arid Conditions

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Journal of Integrative Agriculture 2014年第9期13卷 2028-2039页

作者： KANG Li-yun YUE shan-chao LI Shi-qing Sate Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau Northwest Agriculture and Forestry University College of Forestry Northwest Agriculture and Forestry University

Deep phosphorus application can be a usefull measure to improve crops＇ performance in semi-arid regions, but more knowledge of both its general effects and effects on specific crops is required to optimize treatments. Thus, the aims of this study were to evaluate the effects of phosphorus（P） application at different soil layers on root growth, grain yield, and water-use efficiency（WUE） of winter wheat grown on the semi-arid Loess Plateau of China and to explore the relationship between root distribution and grain yield. The experiment consisted of four P treatments in a randomized complete block design with three replicates and two cultivars： one drought-sensitive（Xiaoyan 22, XY22） and one drought-tolerant（Changhan 58, CH58）. The four P treatments were no P（control, CK）, surface P（SP）, deep P（DP）, and deep-band P application（DBP）. CH58 produced larger and deeper root systems, and had higher grain yields and WUE, under the deep P treatments（DP and DBP） than under SP, clearly showing that deep P placement had beneficial effects on the drought-tolerant cultivar. In contrast, the grain yield and root growth of XY22 did not differ between DP or DBP and SP treatments. Further, root dry weight（RW） and root length（RL） in deep soil layer（30-100 cm） were closely positively correlated with grain yield and WUE of CH58（but not XY22）, highlighting the connections between a well-developed subsoil root system and both high grain yield and WUE for the drought-tolerant cultivar. WUE correlated strongly with grain yield for both cultivars（r=0.94, P〈0.001）. In conclusion, deep application of P fertilizer is a practical and feasible means of increasing grain yield and WUE of rainfed winter wheat in semi-arid regions, by promoting deep root development of drought-tolerant cultivars.

关键词： water stress phosphorus application soil layers grain yield root growth water-use efficiency

A microarray analysis of early activated pathways in concanavalin A-induced hepatitis

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第5期11卷 366-377页

作者： qing-yi CAO Feng CHEN Jie LI shan-shan WU Jing WANG Zhi CHEN State Key Laboratory for Diagnosis and Treatment of Infectious Diseases the First Affiliated Hospital School ofl Medicine Zhejiang University Hangzhou 310003 China

Objective:To explore the mechanisms of fulminant hepatitis(FH) in the early stages,and to determine the critical pathways in its initiation and ***:Twelve BALB/c mice were divided into four groups:one group left as negative control and sacrificed immediately after injection of phosphate-buffered saline(PBS),and another three groups with concanavalin A(Con A) administration sacrificed at 1,3,and 6 h after *** GeneChip Mouse 430 2.0 Array was employed to evaluate the expression profile of each of the 12 *** analysis was done on the microarray data to extract the genes that were differentially *** analysis was carried out to determine relevant pathways within which regulated genes were significantly ***:A total of 393,8354 and 11 344 differentially expressed genes were found,respectively,at three time *** 0-1 h and 1-3 h,most of the pathways enriched with regulated genes were related to immune response and inflammation,among which Toll-like receptor(TLR) signaling and mitogen-activated protein kinase(MAPK) signaling appeared during both phases,while cytokine-cytokine receptor interaction,apoptosis,T cell receptor signaling,and natural killer(NK) cell-mediated cytotoxicity pathways emerged during the second *** found to be significant during 3-6 h were mostly related to metabolic ***:The TLR signaling pathway dominates the early responses of Con A-induced FH in *** stimulates the production of type I cytokines,therefore recruiting and activating T/NK *** T/NK cells exert their cytotoxicity on hepatocytes through inducing death receptorintermediated apoptosis,resulting in liver injury.

关键词： Concanavalin A Fulminant hepatitis Microarray Expression profile Pathway analysis

Simultaneous anti-windup synthesis for linear systems subject to actuator saturation

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Journal of Systems Engineering and Electronics 2015年第1期26卷 119-126页

作者： Maopeng Ran qing Wang Chaoyang Dong Maolin ni School of Automation Science and Electrical Engineering Beihang University School of Aeronautic Science and Engineering Beihang University Chinese Society of Astronautics

A synthesis method for global stability and performance of input constrained linear systems, which uses a linear outputfeedback controller and a static anti-windup compensator is investigated. Different from the traditional two-step anti-windup design procedure, the proposed method synthesizes all controller parameters simultaneously. Sufficient conditions for global stability and minimizing the induced L2 gain are formulated and solved as a linear matrix inequalities（LMIs） optimization problem, which also provides an opportunity to search for a better performance tradeoff between the linear controller and the anti-windup *** well-posedness of the close-loop system is also *** results show the effectiveness of the proposed method.

关键词： actuator saturation anti-windup simultaneous synthesis L2 synthesis linear matrix inequalities(LMIs)

Sharp Estimates of p-Adic Hardy and Hardy-Littlewood-Pólya Operators

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Acta Mathematica Sinica,English Series 2013年第1期29卷 137-150页

作者： Zun Wei FU qing Yan WU shan Zhen LU Department of Mathematics Linyi University School of Mathematical Sciences Beijing Normal University

In this paper we get the sharp estimates of the p-adic Hardy and Hard^Littlewood-Pdlya operators on L^q （｜x｜apdx）. Also, we prove that the commutators generated by the p-adic Hardy operators （Hardy-Littlewood-Pdl... 详细信息

关键词： p-Adic Hardy operator p-Adic Hardy-Littlewood-P61ya operator central BMO function,Herz space