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Non-conjugated polymers as thickness-insensitive electron transport materials in high-performance inverted organic solar cells

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Journal of Energy Chemistry 2020年第8期29卷 196-202,I0007页

作者： Zhiquan Zhang Zheling Zhang yufu Yu Bin Zhao Sheng Li Jian Zhang Songting Tan Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105HunanChina College of Material Science&Engineering Guangxi Key Laboratory of Information MaterialsGuilin University of Electrical TechnologyGuilin 541004GuangxiChina Hunan Research Institute of Light Industry Changsha 410015HunanChina

Two non-conjugated polymers PEIE-DBO and PEIE-DCO, prepared by quaternization of polyethyleneimine ethoxylate by 1,8-dibromooctane and 1,8-dichlorooctane respectively, are developed as electron transport layer(ETL) in high-performance inverted organic solar cells(OSCs), and the effects of halide ions on polymeric photoelectric performance are fully investigated. PEIE-DBO possesses higher electron mobility(3.68×10-4 cm2 V-1s-1), higher conductivity and more efficient exciton dissociation and electron extraction, attributed to its lower work function(3.94 eV) than that of PEIE-DCO, which results in better photovoltaic performance in OSCs. The inverted OSCs with PTB7-Th: PC71BM as photoactive layer and PEIE-DBO as ETL exhibit higher PCE of 10.52%, 9.45% and 9.09% at the thickness of 9, 35 and 50 nm,respectively. To our knowledge, PEIE-DBO possesses the best thickness-insensitive performance in polymeric ETLs of inverted fullerene-based OSCs. Furthermore, PEIE-DBO was used to fabricate the inverted non-fullerene OSCs(PM6:Y6) and obtained a high PCE of 15.74%, which indicates that PEIE-DBO is effective both in fullerene-based OSCs and fullerene-free OSCs.

关键词： Organic solar cells Electron transport materials Thickness-insensitive Non-conjugated polymer

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Expansion Formulas for Orthogonal Projectors onto Ranges of Row Block Matrices

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Journal of Mathematical Research with Applications 2014年第2期34卷 147-154页

作者： Yongge TIAN yufu WANG China Economics and Management Academy Central University of Finance and Economics Zhengzhou Technical School for Surveying and Mapping

We give in this note some expansion formulas for the orthogonal projectors onto the range of the row block matrix [ A, B ], and use the expansion formulas to examine relations among the orthogonal projectors onto the ranges of A, B and [ A, B ]. In particular, we present some identifying conditions for a pair of orthogonal projectors of the same size to commute.

关键词： Moore-Penrose inverse orthogonal projector equality inequality rank formula.

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H∞ State Estimation for Discrete-Time Nonlinear Complex Networks with Sensor Saturation and Fading Channels: The Partial-Nodes-Based Case

H∞ State Estimation for Discrete-Time Nonlinear Complex Net...

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第40届中国控制会议

作者： Qingqing xu yufu Zhi Qi Li School of Information Science and Engineering Hangzhou Normal University

In this article, the issue of partial-nodes-based(PNB) H state estimation is studied for a class of discrete-time nonlinear complex networks(CNs) with sensor saturation and fading channels. Considering that the output signals of certain network nodes may be unavailable in harsh environments, only part of the measurement outputs are used to estimate the state information of the CNs. Moreover, owing to the safety and physical constraints, the measurement outputs are subject to the sensor saturations. A multiple fading channel model with correlation channel coefficient is considered to describe the characteristics of measurement outputs transmitted through diverse fading channels. By utilizing the Lyapunov stability approach, a sufficient condition is proposed to ensure that the estimation error system is exponentially stable and meets the specified H ***, the gain matrices of the estimators are obtained by solving a certain matrix inequality. At last, an illustrated example is shown to testify the effectiveness of the proposed method.

关键词： Sensor saturations complex networks partial-nodes-based fading channels H∞ state estimation

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Neolithic rice paddy from the Zhaojiazhuang site, Shandong, China

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Chinese Science Bulletin 2007年第24期52卷 3376-3384页

作者： JIN GuiYun YAN ShengDong Tetsuro UDATSU LAN yufu WANG ChunYan TONG PeiHua Center for East Asia Archaeology Studies Shandong University Jinan 250100 China School of Archaeology and Museology Peking University Beijing 100871 China Faculty of Agriculture Miyazaki University Miyazaki 889-2192 Japan Provincial Archaeology Institute of Shandong Jinan 250012 China

To identify and study the Neolithic rice paddy in Shandong, eastern China, is not only an important issue in the development of Chinese rice agriculture, but also a key part of the study on rice spread in East Asia. Due to the limitation of archaeological materials and the research methods, there have been no discoveries about the Neolithic rice paddy in Shandong Province for a long time. Based on the identification of possible rice paddy by archaeological excavation, phytolith analysis of soil samples from this "paddy" has been systematically carried out and the results have shown a 4600—4300 years old rice paddy preserved at the Zhaojiazhuang site. This is the first examination and study of the rice paddy in North China by systematic phytolith analysis, which is very important for the Neolithic archaeological research and the study of the eastward spread of rice agricultural techniques in East Asia.

关键词：赵家庄遗址龙山文化稻米植物化石分析农业文化

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A traceability analysis system for model evaluation on land carbon dynamics: design and applications

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Ecological Processes 2021年第1期10卷 170-183页

作者： Jian Zhou Jianyang Xia Ning Wei yufu Liu Chenyu Bian Yuqi Bai Yiqi Luo Zhejiang Tiantong Forest Ecosystem National Observation and Research Station Shanghai Key Lab for Urban Ecological Processes and Eco-RestorationSchool of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China. Research Center for Global Change and Ecological Forecasting East China Normal UniversityShanghai 200241China. Ministry of Education Key Laboratory for Earth System Modelling Department of Earth System ScienceTsinghua UniversityBeijing 100084China. Joint Center for Global Change Studies(JCGCS) Beijing 100084China. Center for Ecosystem Science and Society Department of Biological SciencesNorthern Arizona UniversityFlagstaffArizonaUSA.

Background:An increasing number of ecological processes have been incorporated into Earth system ***,model evaluations usually lag behind the fast development of models,leading to a pervasive simulation uncertainty in key ecological processes,especially the terrestrial carbon(C)*** analysis provides a theoretical basis for tracking and quantifying the structural uncertainty of simulated C storage in ***,a new tool of model evaluation based on the traceability analysis is urgently needed to efficiently diagnose the sources of inter-model variations on the terrestrial C cycle in Earth system ***:A new cloud-based model evaluation platform,i.e.,the online traceability analysis system for model evaluation(TraceME v1.0),was *** TraceME was applied to analyze the uncertainties of seven models from the Coupled Model Intercomparison Project(CMIP6).Results:The TraceME can effectively diagnose the key sources of different land C dynamics among CMIIP6 *** example,the analyses based on TraceME showed that the estimation of global land C storage varied about 2.4 folds across the seven CMIP6 *** all models,IPSL-CM6A-LR simulated the lowest land C storage,which mainly resulted from its shortest baseline C residence *** the historical period of 1850–2014,gross primary productivity and baseline C residence time were the major uncertainty contributors to the inter-model variation in ecosystem C storage in most land grid ***:TraceME can facilitate model evaluation by identifying sources of model uncertainty and provides a new tool for the next generation of model evaluation.

关键词： CMIP6 land carbon cycle model evaluation traceability analysis uncertainty

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An Efficient Algorithm for Query Transformation in Semantic Query Optimization

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High Technology Letters 2002年第1期8卷 32-36页

作者：何增有 Deng Shengchun xu Xiaofei Song yufu Department of Computer Science and Engineering Harbin Institute of Technology Harbin 150001 P.R.China

Semantic query optimization (SQO) is comparatively a recent approach for the transformation of given query into equivalent alternative query using matching rules in order to select an optimal query based on the costs of executing alternative queries. The key aspect of the algorithm proposed here is that previous proposed SQO techniques can be considered equally in the uniform cost model, with which optimization opportunities will not be missed. At the same time, the authors used the implication closure to guarantee that any matched rule will not be lost. The authors implemented their algorithm for the optimization of decomposed sub-query in local database in Multi-Database Integrator (MDBI), which is a multidatabase project. The experimental results verify that this algorithm is effective in the process of SQO.

关键词： Semantic query optimization Implication closure Multidatabase system Predict introduction Predict elimination

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Microinterface intensification in hydrogenation and air oxidation processes

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Chinese Journal of Chemical Engineering 2022年第10期50卷 292-300页

作者： Hongliang Qian Hongzhou Tian Guoqiang Yang Gaodong Yang Lei Li Feng Zhang Zheng Zhou Weihua Huang yufu Chen Zhibing Zhang School of Chemistry&Chemical Engineering Nanjing UniversityNanjing 210046China Department of Pharmaceutical Engineering China Pharmaceutical UniversityNanjing 211198China Nanjing Institute of Microinterfacial Reaction Engineering Nanjing 210008China

Hydrogenations and air oxidations usually have low apparent reaction rate,generally controlled by mass transfer rate,and widely exist in the modern chemical manufacturing *** key to increase the mass transfer rate is the reduction of the liquid film resistance 1/*** this work,the original concept of microinterface intensification for mass transfer and then for these reactions has been *** derived the regulation model and set up the mathematical calculation method of micron-scale gas-liquid interface structure on mass transfer and reaction,designed the mechanical energy exchange device that can produce gas-liquid microinterface system on a large scale,and established the OMIS system which is able on line to measure the diameter and distribution of millions of microbubbles,interface area a and mass transfer film thicknessδM,as well as developed a series of microinterface intensified reactor systems(MIRs)for the applications of hydrogenation and air oxidation *** is believed that this research will provide an up-to-date development for the intensification of hydrogenation and air oxidation reactions.

关键词： Hydrogenation andoxidation Microinterface intensification Mass transfercoefficient Structure-effect regulation Online measurement

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Toughening and Responsive Contractile Shape Memory Fibrous Membrane via Water for Mechanically Active Wound Dressing

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Advanced Fiber Materials 2024年第6期6卷 1942-1954页

作者： Wen Liu Wei Zhao Kunrong Xie xue Feng Li yufu Wang Deyan Kong Yanju Liu Jinsong Leng National Key Laboratory of Science and Technology On Advanced Composites in Special Environment Harbin Institute of TechnologyHarbin 150080People’s Republic of China Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)No.92 West Dazhi StreetP.O.Box 301Harbin 150001People’s Republic of China Department of Orthopedic Surgery Second Affiliated Hospital of Harbin Medical UniversityNo.246Baojian RoadHarbin 150086People’s Republic of China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyNo.92West Dazhi StreetHarbin 150001People’s Republic of China

Conventional wound dressings only protect passively against bacterial *** mechanically active adhesive dressings(AADs)are inspired by the active closure of embryonic *** can promote wound healing by actively con-tracting the wound *** meet the requirements of high toughness,stimulus-response,and dynamic adhesion proper-ties,which are ***,we construct a water-responsive shape memory polyurea fibrous membrane(PU-fm)featuring favorable toughness,wet-adhesion,breathability,absorbency of four times its weight,and ***,the water-toughened electrospun PU-fm is fabricated using a homemade polyurea(PU)elastomer with multistage hydrogen bond networks as a spinning ***,a Janus-structured polyurea-polydopamine-silver fibrous membrane(PU@PDA@Ag-fm)is engineered,integrating antibacterial properties without compromising mechanical *** demonstrates strong adhesion to the skin,actively promotes wound contraction,and enables adaptive wrapping of tissues of varying sizes by the water-driven shape memory *** tests and wound healing experiments indicate that the PU@PDA@Ag-fm has favorable antibacterial properties against Escherichia coli(***)and accelerates the wound healing rate by 20%.For the first time,water-responsive shape memory PU-fm as the AADs is constructed,providing a new strategy for wound *** can be extended to applications in other smart devices for biomedicine such as tendon repair,and bioelectronic interfaces.

关键词： Mechanically active dressing Electrospun fibrous membrane Janus structure Water-responsive shape memory

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Design Methods of Ecological Urban Park

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Journal of Landscape Research 2013年第Z3期5卷 1-3,7页

作者： CHEN yufu Architectural and Planning College Jilin Jianzhu University

On the basis of summarizing design methods of ecological urban park,it was proposed that preparatory control work should be enhanced,reasonable zoning of use functions and spatial structures established,overall consideration given to traffi c system and vertical design,and landscaping system created based on ecological view. In addition,it was also signifi cant for designers and management departments taking proper planning and designs to create new urban open spaces,improve supporting facilities,enhance public participation mechanism,and keep pace with the sustainable development of the city.

关键词： Ecological Urban park Design method

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Cultivating Political Integrity Is a Major Task of the CPC

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Qiu Shi 2013年第3期5卷 19-23页

作者： Li yufu

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