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Cyclodextrin derivatives functionalized highly sensitive chiral sensor based on organic field-effect transistor

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Chinese Chemical Letters 2020年第1期31卷 99-102页

作者： Yifan Wu Xuepeng Wang Xiaoxuan Li Yin Xiao Yong wang School of Chemical Engineering and Technology Tianjin Engineering Research Center of Functional Fine ChemicalsTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China

Novel highly sensitive chiral organic field-effect transistors(COFET)were developed by directly assembling imidazolium3,5-dimethylphenylcabamoylated-β-cyclodextrin(lm^+-Ph-β-CD)and 3,5-dimethylphenylcarbamoylated-β-CD(Ph-β-CD)respectively onto the semiconductor layer as sensing units.The Im+-Ph-β-CD/COFET afforded better enantioselectivity and a lowest detection concentration of10^-18 L/mol as well as the potentiality in quantitative analysis of commercial medicines.

关键词： Chiral discrimination OFET Sensor β-Cyclodextrin derivatives Real-time detection Quantitative detection

Electroextraction of neodymium from LiCl-KCl melt using binary liquid Ga-Al cathode

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Journal of Rare Earths 2023年第8期41卷 1250-1257,I0005页

作者： Li Ding Xuepeng Wang Yongde Yan Valeri Smolenski Wenda Xu Alena Novoselova Yun Xue Fuqiu Ma Xingmei Zhang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Yantai Research Institute of Harbin Engineering University Yantai 264006China Institute of High-Temperature Electrochemistry UB RAS Ekaterinburg 620990Russia Department of Rare Metals and Nanomaterials Institute of Physics and TechnologyUral Federal UniversityEkaterinburg 620990Russia Yantai Standard Metrology Inspection&Test Center National Steam Flowrate Measurement StationYantai 264000China

The electrochemical behaviour of Nd(Ⅲ)ion was investigated on inert W,active Ga and Ga-AI cathodes.It is established that the reduction of Nd(Ⅲ)ion on the inert electrode is a consecutive two-step process while that on the active electrodes is a one-step process.The apparent standard potential of the Nd(Ⅲ)/Nd redox couple at different temperatures was determined by open-circuit chronopotentiometry and semi-differential method,and the relationship between temperature and apparent standard potential was further discussed.The thermodynamic properties of Nd in Ga and Ga-Al electrodes such as activity coefficient and activity were evaluated via intermittent coulomb titration and temperature dependence test,and the effect of temperature on activity coefficient was verified.Finally,Nd was successfully extracted in form of alloy from molten salt by galvanostatic electrolysis,in which the current efficiency of91.7%for the electroextraction indicates that the binary liquid Ga-Al electrode has favorable performance.

关键词： Rareearths Electroextraction Spent nuclear fuel Pyrochemical processing Lanthanides Binary liquid cathode

Analysis and prediction of global vegetation dynamics:past variations and future perspectives

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Journal of Forestry Research 2023年第2期34卷 317-332页

作者： Guangchao Li Wei Chen Liqiang Mu xuepeng Zhang Pengshuai Bi Zhe wang Zhen Yang College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083People’s Republic of China School of Forestry Northeast Forestry UniversityHarbin 150040People’s Republic of China College of Information Science and Engineering Henan University of TechnologyZhengzhou 450001People’s Republic of China

Spatiotemporal dynamic vegetation changes affect global climate change,energy balances and the hydrological cycle.Predicting these dynamics over a long time series is important for the study and analysis of global environmental change.Based on leaf area index(LAI),climate,and radiation flux data of past and future scenarios,this study looked at historical dynamic changes in global vegetation LAI,and proposed a coupled multiple linear regression and improved gray model(CMLRIGM)to predict future global LAI.The results show that CMLRIGM predictions are more accurate than results predicted by the multiple linear regression(MLR)model or the improved gray model(IGM)alone.This coupled model can effectively resolve the problem posed by the underestimation of annual average of global vegetation LAI predicted by MLR and the overestimate predicted by IGM.From 1981 to 2018,the annual average of LAI in most areas covered by global vegetation(71.4%)showed an increase with a growth rate of 0.0028 a-1;of this area,significant increases occurred in 34.42%of the total area.From 2016 to 2060,the CMLRIGM model has predicted that the annual average global vegetation LAI will increase,accounting for approximately 68.5%of the global vegetation coverage,with a growth rate of 0.004 a-1.The growth rate will increase in the future scenario,and it may be related to the driving factors of the high emission scenario used in this study.This research may provide a basis for simulating spatiotemporal dynamic changes in global vegetation conditions over a long time series.

关键词： Vegetation dynamics LAI CMLRIGM Prediction Climate Radiation

Degradation properties of fulvic acid and its microbially driven mechanism from a partial nitritation bioreactor through multi-spectral and bioinformatic analysis

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Journal of Environmental Sciences 2024年第1期135卷 318-331页

作者： Quanhao Dou Li Zhang Tingjun Dong Zixuan Song xuepeng Fan Yongzhen Peng Xiayan wang Jiachun Yang National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery EngineeringBeijing University of TechnologyBeijing 100124China Department of Chemistry and Biology Center of Excellence for Environmental Safety and Biological EffectsBeijing Key Laboratory for Green Catalysis and SeparationBeijing University of TechnologyBeijing 100124China Environmental Protection Development Group Co. Ltd.Shandong 250101China

This study employed multispectral techniques to evaluate fulvic acid(FA)compositional characteristic and elucidate its biodegradation mechanisms during partial nitritation(PN)process.Results showed that FA removal efficiency(FRE)decreased from 90.22 to 23.11%when FA concentrations in the reactor were increased from 0 to 162.30 mg/L,and that molecular size,degree of aromatization and humification of the effluent FA macromolecules all increased after treatment.Microbial population analysis indicated that the proliferation of the Comamonas,OLB12 and Thauera exhibit high FA utilization capacity in lower concentrations(<50.59 mg/L),promoting the degradation and removal of macromolecular FA.In addition,the sustained increase in external FA may decrease the abundance of above functional microorganisms,resulting in a rapid drop in FRE.Furthermore,from the genetic perspective,the elevated FA levels restricted carbohydrate(ko00620,ko00010 and ko00020)and nitrogen(HAO,AMO,NIR and NOR)metabolism-related pathways,thereby impeding FA removal and total nitrogen loss associated with N_(2)O emissions.

关键词： Partial nitritation Fulvic acid 3DEEM-PARAFAC UV/Vis Microbially driven mechanism

How polar hydroxyl groups affect surface hydrophobicity on model talc surfaces

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Communications in Theoretical Physics 2021年第11期73卷 142-149页

作者： Zhuangzhuang Chen Chonghai Qi xuepeng Teng Bo Zhou Chunlei wang Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China School of Physics Shandong UniversityJinan 250100China Shandong Cancer Hospital and Institute Shandong First Medical University and Shandong Academy of Medical SciencesJinan 250117China School of Electronic Engineering Chengdu Technological UniversityChengdu 611730China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

Based on molecular dynamics simulations,we have studied the wetting behaviors of water on the talc-like surface with different surface polarity by modifying the charge distribution of surface hydroxyl(–OH)groups.With the change of the charge of the hydrogen atom(denoted asδq)in–OH group,the contact angle decreases from 91°to 50°and then remains constant.On the surfaces with the larger charge of hydrogen atoms(δ_(q)≥0.2 e),a water droplet is formed above a water monolayer,which is exactly contacted on the surface.Each water molecule in the monolayer forms one hydrogen bond(H bond)with surface–OH groups,without participating in any H bond with the water molecules within the monolayer or with the water molecules above the monolayer.The polarity of the–OH group also has a great influence on the dynamic behaviors of the interface water,such as residence time,hydrogen bond lifetime and selfdiffusion coefficient.The diffusion of water molecules in the water monolayer near the highly polar surface is greatly suppressed,and the residence time of water molecules in the water monolayer even exceeds 12 ns.

关键词： talc wetting properties trapping effect molecular dynamics simulation

Research on Visualization Technology of 3D Cable Harness Wiring of Complex Electromechanical Products

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Research on Visualization Technology of 3D Cable Harness Wir...

A gate-tunable artificial synapse based on vertically assembled van der Waals ferroelectric heterojunction

第32届中国控制与决策会议

作者： wang Falin Guo xuepeng Guo Yaowen School of Aeronautical Manufacturing Engineering Nanchang Hangkong University

ISBN: (数字)9781728158556

ISBN: (纸本)9781728158563

Rigid structural parts not only shield the position and pose of the cable harness,but also the position of electrical components interface when wiring due to the narrow interior space and the large number of parts in complex electromechanical products.More than that,it will also affect the normal operation of the device due to inaccurate cable harness installation and poor contact.Based on the above difficulties,the wiring process visualization technology of 3 D cable harness was researched.And developed a corresponding prototype system of wiring process visualization for 3 D cable harness based on the axis-aligned bounding box technology,and elaborated the functions of how to create,activate,and delete the simplified view of the 3 D cable harness wiring.Finally,the method has been verified in the cable harness wiring of a phased array radar model,which proved that the 3 D cable harness wiring simplified view created by the system can clearly display the position and pose information of cable harness and electrical connectors,and improved the wiring efficiency.

关键词： Cable harness wiring Visualization Axis-Aligned Bounding Box Simplified view

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Journal of Materials Science & Technology 2022年第33期128卷 239-244页

作者： Yaning wang Wanying Li Yimeng Guo Xin Huang Zhaoping Luo Shuhao Wu Hai wang Jiezhi Chen Xiuyan Li xuepeng Zhan Hanwen wang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Material Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Applied Physics Aalto UniversityAaltoFinland School of Information Science and Engineering(ISE) Shandong UniversityQingdao 266237China

Memtransistor,a multi-terminal device that combines both the characteristics of a memristor and a transistor,has been intensively studied in two-dimensional layered materials(2 DLM),which show potential for applications in such as neuromorphic computation.However,while often based on the migration of ions or atomic defects in the conduction channels,performances of memtransistors suffer from the poor reliability and tunability.Furthermore,those known 2 DLM-based memtransistors are mostly constructed in a lateral manner,which hinders the further increasing of the transistor densities per area.Until now,fabricating non-atomic-diffusion based memtransistors with vertical structure remains challenging.Here,we demonstrate a vertically-integrated ferroelectric memristor by hetero-integrating the 2 D ferroelectric materials CuInP_(2)S_(6)(CIPS)into a graphite/CuInP_(2)S_(6)/MoS_(2)vertical heterostructure.Memristive behaviour and multi-level resistance states were realized.Essential synaptic behaviours including excitatory postsynaptic current,paired-pulse-facilitation,and spike-amplitude-dependent plasticity are successfully mimicked.Moreover,by applying a gate potential,the memristive behaviour and synaptic features can be effectively gate tuned.Our findings pave the way for the realization of novel gate-tunable ferroelectric synaptic devices with the capability to perform complex neural functions.

关键词： van der Waals heterostructures Ferroelectrics Memristor Artificial synapse Neuromorphic computing

Effects of Pendular Waist on Gecko＇s Climbing： Dynamic Gait, Analytical Model and Bio-inspired Robot

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Journal of Bionic Engineering 2017年第2期14卷 191-201页

作者： Wei wang xuepeng Li Shilin Wu Peihua Zhu Fei Zhao Robotics Institute Beihang University Beijing 100191 China CRRC Qingdao Sifang Co. Ltd. Qingdao 266111 China

Most quadruped reptiles, such as lizards, salamanders and crocodiles, swing their waists while climbing on horizontal or vertical surfaces. Accompanied by body movement, the centroid trajectory also becomes more of a zigzag path rather than a straight line. Inspired by gecko＇s gait and posture on a vertical surface, a gecko inspired model with one pendular waist and four active axil legs, which is called GPL model, is proposed. Relationship between the waist position, dynamic gait, and driving forces on supporting feet is analyzed. As for waist trajectory planning, a singular line between the supporting feet is found and its effects on driving forces are discussed. Based on the GPL model, it is found that a sinusoidal waist trajectory, rather than a straight line, makes the driving forces on the supporting legs smaller. Also, a waist close to the pygal can reduce the driving forces compared to the one near middle vertebration, which is in accord with gecko＇s body bending in the process of climbing. The principles of configuration design and gait planning are proposed based on theoretical analyses. Finally, a bio-inspired robot DracoBot is developed and both of the driving force measurements and climbing experiments reinforce theoretical analysis and the rationality of gecko＇s dynamic gait.

关键词： multi-legged robot wall-climbing robot dynamic gait pendular waist GPL model

Flash memory based computing-in-memory system to solve partial differential equations

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Science China(Information Sciences) 2021年第6期64卷 257-258页

作者： Yang FENG Fei wang xuepeng ZHAN Yuan LI Jiezhi CHEN School of Information Science and Engineering Shandong University

Dear editor,Many emerging non-volatile memories(NVM), such as resistive random access memory(RRAM) [1], phase-change memory(PCM) [2], and ferroelectric RAM(FeR AM) [3],together with the conventional flash memory [4, 5... 详细信息

关键词： Flash memory based computing-in-memory system to solve partial differential equations