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Preparation and Characterization of Anthracenecarboxylic Acid Doped Polyaniline Thin Films

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Chinese Journal of Polymer Science 2014年第8期32卷 1060-1067页

作者： Ya-fang tian 谭付瑞 Zhengzhou Railway Vocational & Technical College Key Laboratory of Photovoltaic Materials Department of Physics & ElectronicsHenan University

Doped polyaniline films were prepared with electrochemistry method. A small conjugated molecule; anthracenecarboxylic acid （2-ACA）, was used as the dopant, considering its electrical activeness due to the conjugated π-π structure. Film morphology of doped and undoped polyaniline samples was investigated. The corresponding changes in optical and electrical properties after ACA doping were discussed. By measuring and calculating their energy level distribution, a promising application of polyaniline thin films as buffer layer in optic-electric devices is expectable.

关键词： Electrochemistry Polyaniline (PANI) Doping Solar cells.

An efficient method of addressing ectopic beats:new insight into data preprocessing of heart rate variability analysis

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第12期12卷 976-982页

作者： Feng WEN fang-tian HE College of Life Science Zhejiang University Hangzhou 310027 China ECG Department Sir Run Run Shaw Hospital School of Medicine Zhejiang University Hangzhou 310016 China

Heart rate variability(HRV) analysis is affected by ectopic *** efficient method was proposed to deal with the ectopic *** method was based on trend correlation of the heart timing *** of R-R interval(RRI) value at ectopic beat time was constructed by the weight calculation and the slope estimation of preceding normal *** type of ectopic beat was detected and replaced by the predictor of *** performance of the simulated signal after ectopic correction was tested by the standard value using power spectrum density(PSD) estimation,whereas the results of clinical data with ectopic beats were compared with the adjacent ectopic-free *** result showed the frequency indexes after ectopy corrected had less error than other methods with the test of simulated signal and clinical *** indicated our method could improve the PSD estimation in HRV *** method had advantages of high accuracy and real time properties to recover the sinus node modulation.

关键词： Frequency domain Ectopic beat Heart rate variability(HRV) Power spectrum density

Formation of hierarchical Fe7Se8 nanorod bundles with enhanced sodium storage properties

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Journal of Energy Chemistry 2020年第5期29卷 97-105页

作者： Wenzhi tian Wenzhe Ma Zhenyu Feng fang tian Haibo Li Jing Liu Key Laboratory of Colloid and interface Chemistry Ministry of EducationSchool of Chemistry and Chemical Engineeringand State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100ShandongChina Department of Science and Technology of Shandong Province Jinan 250100ShandongChina School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059ShandongChina College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina

Ordered hierarchical architectures are attractive candidates for electrochemical energy storage ***,a facile self-template strategy is applied to prepare Fe7Se8 architectures with a monolithic structure via a self-synthesized single precursor and subsequent calcination at high *** the support of oleylamine,the precursor is structurally targeted to engineer the Fe7Se8 microstructure,featuring nanorod bundles arranged along the longitudinal *** of their ordered hierarchical structure,the Fe7Se8 nanorod bundles deliver a high reversible capacity of 300 m Ah g^-1 at 0.5 A g^-1,along with exceptional rate capability up to 20 A g^-1 and long-term cycle life over 8000 cycles,which represents the highest stability of Fe7Se8 anodes for sodium-ion batteries reported to *** feasibility of the present strategy to prepare metal selenide structures highlights its promising potential for the rational and effective engineering of electrode materials responsible for the electrochemical performance of energy storage systems.

关键词： Fe7Se8 Hierarchical structure Nanorod bundles Sodium-ion batteries Oleylamine

Integrated pest management and plant health

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Journal of Integrative Agriculture 2022年第12期21卷 3417-3419页

作者： ZHOU Xue-ping tian fang Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100193P.R.China

Crop production and livelihoods of smallholder farmers are often threatened by crop insect pests and diseases worsening the insecurity of *** has rapidly increased the introduction and threats of invasive *** change results in a changed suitability of landscapes to pests,further increasing the threat and uncertainty of their *** innovative technologies for sustainable pest management to smallholder farmers is urgently needed for food security and eliminating poverty.

关键词： landscape threat suitability

Multi-view based neural network for semantic segmentation on 3D scenes

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Science China(Information Sciences) 2019年第12期62卷 248-250页

作者： Yonghua LU Mingmin ZHEN tian fang School of Resource and Environmental Sciences Wuhan University Department of Computer Science and Engineering The Hong Kong University of Science and Technology

Dear editor,For semantic segmentation tasks, convolutional neural network (CNN) based methods have been prevalent for both 2D image semantic segmentation and 3D semantic segmentation. Though traditional methods often ... 详细信息

关键词： Multi-view based neural network for semantic segmentation on 3D scenes CRF

Improving the quality of pollen-climate calibration-sets is the primary step for ensuring reliable climate reconstructions

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Science Bulletin 2018年第20期63卷 1317-1318页

作者： Xianyong Cao fang tian Wei Ding Key Laboratory of Alpine Ecology and Biogeography Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing Key Laboratory of Resource Environment and GIS College of Resource Environment and Tourism Capital Normal University Institute of Geological Sciences Palaeontology Free University of Berlin

Pollen-based climate reconstructions have been widely applied in China [1,2]as an essential way to investigate quantitatively past climate change,which is necessary to improve the reliability of future climate predictions [3].However,their usefulness is often doubted,particularly for those regions with a long history of civilization (*** China),where both the modern and past vegetation are heavily disturbed by human activities [4-6].Which factors influence the integrity of pollen-based climate reconstructions and how to improve their reliability are rigorous challenges for *** work focusing on these two questions has used modern pollen data from China or eastern continental Asia and mainly concludes that past climate reconstruction is quite sensitive to the clualitv of the calibration-set [2,7].

关键词： pollen-climate

Detection of weak non-covalent cation-π interactions in NGAL by single-molecule force spectroscopy

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Nano Research 2022年第5期15卷 4251-4257页

作者： Jingyuan Nie Yibing Deng fang tian Shengchao Shi Peng Zheng State Key Laboratory of Coordination Chemistry Chemistry and Biomedicine Innovation Center(ChemBIC)School of Chemistry and Chemical EngineeringNanjing University163 Xianlin RoadNanjing 210023China

Cation-π interaction is an electrostatic interaction between a cation and an electron-rich *** plays an essential role in many biological systems as a vital driving force for protein folding,stability,and receptor-ligand interaction/*** date,the discovery of most cation-π interactions in proteins relies on the statistical analyses of available three-dimensional(3D)protein structures and corresponding computational ***,their experimental verification and quantification remain sparse at the molecular level,mainly due to the limited methods to dynamically measure such a weak non-covalent interaction in ***,we use atomic force microscopy-based single-molecule force spectroscopy(AFM-SMFS)to measure the stability of protein neutrophil gelatinase-associated lipocalin(also known as NGAL,siderocalin,lipocalin 2)that can bind iron through the cation-π interactions between its three cationic residues and the iron-binding *** on a site-specific cysteine engineering and anchoring method,we first characterized the stability and unfolding pathways of ***,the same NGAL but bound with the iron-catechol complexes through the cation-π interactions as a holo-form was *** measurements demonstrated stronger stabilities and kinetics of the holo-NGAL from two pulling sites,F122 and ***,NGAL is stretched from the designed cysteine close to the cationic residues for a maximum unfolding ***,our work demonstrates high-precision detection of the weak cation-π interaction in NGAL.

关键词： cation-Tr interaction neutrophil gelatinase-associated lipocalin(NGAL) single-molecule force spectroscopy atomic force microscopy(AFM)

Au-Ag Alloy Nanoporous Nanotubes

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Nano Research 2009年第5期2卷 386-393页

作者： Xiaohu Gu Liqiang Xu fang tian Yi Ding School of Chemistry and Chemical Engineering Key Laboratory of Liquid Structure and Heredity of MaterialsMinistry of EducationShandong UniversityJinan 250100China

Metallic nanostructures with hollow interiors or tailored porosity represent a special class of attractive materials with intriguing chemicophysical *** paper presents the fabrication of a new type of metallic nanoporous nanotube structure based on a facile and effective combination of nanocrystal growth and surface *** controlling the individual steps involved in this process,such as nanowire growth,surface modification,thermal diffusion,and dealloying,one-dimensional(1-D)metallic nanostructures can be prepared with tailored structural features and pre-designed *** tubular and porous nanostructures show distinct optical properties,such as tunable absorption in the near-infrared region,and enhanced capability for electrochemiluminescence signal amplification,which make them particularly desirable as novel 1-D nano-carriers for biomedical,drug delivery and sensing applications.

关键词： Nanoporous nanotube gold optical properties electrochemiluminescence

A Cool-Arid Climate with Large Temperature Seasonality Implied by Arboreal Pollen in the Early Holocene,North-Central China

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Journal of Earth Science 2023年第5期34卷 1629-1631页

作者： fang tian Meijiao Chen Qinghai Xu Xianyong Cao College of Resource Environment and Tourism Capital Normal UniversityBeijing 100048China College of Geography Sciences Hebei Normal UniversityShijiazhuang 050024China Group of Alpine Paleoecology and Human Adaptation(ALPHA) State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

The climate of the North-Central China during the Early Holocene is still debated,particularly with regard to precipitation,despite various paleoclimate records based on multi proxies and models(Chen et al.,2015;Liu J B et al.,2015;Liu Z Y et al.,2014).The temperature pattern is also uncertain because of a lack of temperature records for north-central *** sequences are still the most abundant paleo-environmental record particularly for north-central China and have the potential to explore the past precipitation and temperature changes,because both precipitation and temperature are essential for plant growth,and the sensitivity to climatic variables varies among different plants(Liang et al.,2020).Quantitative climate reconstructions based on the modern pollen-climate relationship have been widely generated for east Asia,and the results used to explore the spatial-temporal patterns and mechanisms of past climate changes(Chen et al.,2020,2015;Herzschuh et al.,2019).

关键词： China Holocene climate