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Chinese Chemical Letters 2023年第8期34卷 337-342页

作者： Chuanxin Wei jianfeng Wang Yanni Zhang Xuehua Ding Yanze Jiang Qiang zhao Jinyi Lin jianfeng zhao Linghai Xie Wei Huang Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)Nanjing 211816China Key Laboratory for Organic Electronics and Information Displays Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China Institute of Flexible Electronics(IFE) Northwestern Polytechnical University(NPU)Xi’an 710072China

To understand the deformation mechanism of molecular crystals under mechanical forces will accelerate the molecular design and preparation of deformable ***,the relationship between structural halogenation and molecular-level stacking,micro/nanoscale surface morphology,and macroscopic mechanical properties are *** crystals of halo-pyrimidinyl carbazoles(CzM-Cl,CzM-Br and CzM-I)with lamellar structure and brittle crystal(CzM-F)were quantitatively analyzed by crystal energy framework(CEF)providing the inter/intralayer interaction energy(Inter/Intra-IE).It is revealed that the elastic crystals bend under external force as a result from stronger Intra-IE to prevent cleavage and weaker Inter-IE for the short-range movement of molecules on the slip *** research will provide an insight for the molecular design of flexible crystals and facilitate the development of next-generation smart crystal materials.

关键词： Halogen Lamellar crystal Elasticity Crystal energy framework(CEF) Inter/intralayer interaction energy (Inter/Intra-IE)

Implementing an Optimal Energy Management System for a Set of Microgrids Using the Harmony Search Algorithm

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Energy Engineering 2022年第5期119卷 1843-1860页

作者： Xiangjian Shi Teng Liu WeiMu jianfeng zhao School of Electrical Engineering Southeast UniversityNanjing210096China NR Electric Co. Ltd.Nanjing211106China

A microgrid(MG)refers to a set of loads,generation resources and energy storage systems acting as a controllable load or a generator to supply power and heating to a local *** MG-generated power management is a central topic for MG design and *** existence of dispersed generation(DG)resources has faced MG management with new *** on the level of exchanges between an MG and the main grid,the MG operation states can be divided into independent or grid-connected *** management in MGs aims to supply power at the lowest cost for optimal load *** study examines MG energy management in two operational modes of islanded and grid-connected,and proposes a structure with two control layers(primary and secondary)for energy *** the principal level of control,the energy management system is determined individually for all MG by taking into consideration the probability constraints and RES uncertainty by the Weibull the probability density function(PDF),generation resources’power as well as the generation surplus and deficit of each ***,the information of the power surplus and deficit of each MG must be sent to the central energy management *** confirm the proposed structure,a case system with two MGs and a condensive load is simulated by using a multi-time harmony search *** scenarios are applied to evaluate the performance of this *** findings clearly show the effectiveness of the proposed system in the energy management of several MGs,leading to the optimal performance of the resources per ***,the proposed control scheme properly controls the MG and grid’s performance in their interactions and offers a high level of robustness,stable behavior under different conditions and high quality of power supply.

关键词： Harmony search algorithm multi-MG system multi-owner systems central and non-central control optimal energy management uncertainty

Electric Vehicle Charging Simulation Framework Considering Traffic,User,and Power Grid

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Journal of Modern Power Systems and Clean Energy 2021年第3期9卷 602-611页

作者： Weicheng Liu Xujiang Shi jianfeng zhao Xiao-Ping Zhang Ying Xue the School of Electrical Engineering Southeast UniversityNanjing 210096China the Department of Electronic Electrical and System EngineeringSchool of EngineeringUniversity of BirminghamBirminghamUK

The traffic and user have significant impacts on the electric vehicle(EV)charging load but are not considered in the existing *** propose a novel integrated simulation framework considering the traffic,the user,and power grid as well as the EV traveling,parking and charging based on cellular automaton(CA).The traffic is modeled by the traffic module of the proposed framework based on CA,while the power grid and user are modeled in the EV charging *** traffic flow,user’s charging preference,user’s charging satisfaction,and the total supply capability(TSC)in the surveyed region are considered in the proposed *** cases are carried out to show the interactions between the user and power *** is shown that the proposed framework can accurately simulate the interactions among traffic situation,user's behavior and TSC,which are significantly lacking in the existing *** proposed framework is scalable in considering additional interrelated elements.

关键词： Electric vehicle(EV) integrated simulation framework cellular automaton traffic user power grid

Grain oriented growth and properties of ultra-high temperature CaBi_2Nb_2O_9 piezoelectric ceramics

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Science China Chemistry 2011年第10期54卷 1552-1557页

作者： TIAN XiaoXia QU ShaoBo WANG BinKe ZHANG WuSen zhao jianfeng College of Science Air Force Engineering University Xi'an 710051 China

CaBi2Nb2O9 (CBNO) ceramics was prepared at 1050℃ using regular flake-like CBNO powders as the precursor, and synthe-sized by the molten salts synthesis method. The tropism degree and microstructure of the ceramics were analyzed, and the die-lectric, ferroelectric and piezoelectric properties were characterized. Compared with conventional methods, the properties of CBNO ceramics by the new preparation method were found to be better. As the sinter temperature decreases, the grain growth becomes regular with textured features. The polarization process becomes easy to be realized at room temperature. Moreover, the dielectric loss decreases and the piezoelectric constant increases significantly.

关键词： CaBi2Nb2O9 ultra-high temperature grain oriented growth performance

Photosensitive damage of lysozyme caused by pazufloxacin and the protective effect of ferulic acid

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Science China Chemistry 2015年第3期58卷 508-513页

作者： Yulie Xu Yancheng Liu Haixia Li Peng Zhang jianfeng zhao Wenfeng Wang Shanghai Institute of Applied Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

Laser flash photolysis and sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE) experiments were carried out to study the photosensitive damage induced by pazufloxacin(PAX) and the protection of lysozyme(Lyso) by ferulic acid(FCA), an active antioxidant. Transient absorption spectra revealed electron transfer from Lyso and FCA to 3PAX*, with respective bimolecular reaction rate constants of 6.3×107 and 1.4×1010 dm3/(mol s). A pulse radiolysis study was also performed to investigate the formation of Lyso radical cations. Results showed that FCA effectively inhibited the cross-linking of protein induced by fluoroquinolones. Finally, a mechanism of the protective effect of FCA on Lyso was proposed.

关键词： lysozyme pazufloxacin ferulic acid laser flash photolysis pulse radiolysis SDS-PAGE

Seismic damage of highway bridges during the 2008 Wenchuan earthquake

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Earthquake Engineering and Engineering Vibration 2009年第2期8卷 263-273页

作者： Han Qiang Du Xiuli Liu Jingbo Li Zhongxian Li Liyun zhao jianfeng Lab. of Urban Security ＆ Dixaster Engineering of MOE Beijing University of Technology Beijing 100124 China Key Department of Civil Engineering Tsinghua University Belling 100084 China College of Civil Engineering Tianjin University Tianjin 200072 China College of Civil Engineering Qingdao Technological University Qingdao 266033 China

Many highway bridges were severely damaged or completely collapsed during the 2008 Wenchuan earthquake. A field investigation was carried out in the strongly affected areas and over 320 bridges were examined. Damage to some representative highway bridges is briefly described and a preliminary analysis of the probable causes of the damage is presented in this paper. The most common damage included shear-flexural failure of the pier columns, expansion joint failure, shear key failure, and girder sliding in the transversal or longitudinal directions due to weak connections between girder and bearings. Lessons learned from this earthquake are described and recommendations related to the design of curved and skewed bridges, design of bearings and devices to prevent girder collapse, and ductility of bridge piers are presented. Suggestions for future seismic design and retrofitting techniques for bridges in moderate to severe earthquake areas are also proposed.

关键词： Wenchuan earthquake seismic damage seismic design highway bridge field investigation

Switchable shape memory polymer bio-inspired adhesive and its application for unmanned aerial vehicle landing

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Chinese Journal of Aeronautics 2024年第3期37卷 380-390页

作者： Qingsong HE Zefang zhao Qiyun ZHONG Siyuan LIU Kai DENG Yongqi LIU Ning ZHANG Zijie zhao Fengjiang ZHAN jianfeng zhao Jiangsu Provincial Key Laboratory of Bionic Functional Materials College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Advanced Technology for Small and Medium-Sized UAV Ministry of Industry and Information TechnologyUnmanned Aerial Vehicles Research InstituteNanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Mechanics and Control of Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Functional Morphology and Biomechanics Institute of ZoologyKiel UniversityKiel 24098Germany

Controlled and switchable adhesion is commonly observed in biological *** recent years,many scholars have focused on making switchable bio-inspired ***,making a bio-inspired adhesive with high adhesion performance and excellent dynamic switching properties is still a challenge.A Shape Memory Polymer Bio-inspired Adhesive(SMPBA)was successfully developed,well realizing high adhesion(about 337 kPa),relatively low preload(about90 kPa),high adhesion-to-preload ratio(about 3.74),high switching ratio(about 6.74),and easy detachment,which are attributed to the controlled modulus and contact area by regulating temperature and the Shape Memory Effect(SME).Furthermore,SMPBA exhibits adhesion strength of80–337 kPa on various surfaces(silicon,iron,and aluminum)with different roughness(Ra=0.021–10.280)because of the conformal contact,reflecting outstanding surface *** finite element analysis verifies the bending ability under different temperatures,while the adhesion model analyzes the influence of preload on contact area and ***,an Unmanned Aerial Vehicle(UAV)landing device with SMPBA was designed and manufactured to achieve UAV landing on and detaching from various *** study provides a novel switchable bio-inspired adhesive and UAV landing method.

关键词： Bio-inspired adhesive Shape memory polymers Switchable adhesive Unmanned aerial vehicle Landing

Synthesis and characterization of amphiphilic graphene

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Science China(Technological Sciences) 2014年第2期57卷 244-248页

作者： DU ZhuZhu AI Wei zhao jianfeng XIE LingHai HUANG Wei Centre of Molecular System and Organic Devices (CMSOD) Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM) Nanjing University of Posts and Telecommunications Jiangsu-Singapore Joint Research Center for Organic/Bio- Electronics & Information Displays and Institute of Advanced Materials Nanjing University of Technology

A simple and effective method for the preparation of amphiphilic graphene(AG)is presented under an organic solvent-free synthetic *** synthetic route first involves a cyclization reaction between carboxylic groups on graphene oxide and the amino groups on 5,6-diaminopyrazine-2,3-dicarbonitrile,and subsequent reduction by *** of UV-vis spectroscopy,Fourier transformed infrared spectroscopy(FT-IR),X-ray photoelectron spectroscopy(XPS),thermogravimetric analysis(TGA)and Raman spectroscopy have confirmed that the covalent functionalization of graphene can be achieved through the formation of imidazo[4,5-b]pyrazine on the graphene *** a result,AG can be successfully dispersed in water and common organic *** work successfully provides a facile and efficient way to fabricate AG and may extend the potential applications of graphene-based materials in nanoelectronic devices,polymer fillers and biological field.

关键词： amphiphilic graphene 5,6-diaminopyrazine-2,3-dicarbonitrile cyclization reaction

Simulation and Analysis of Electromagnetic Force in Laser Melting Deposition by Electromagnetic Impact

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第4期35卷 702-709页

作者： Xie Na zhao jianfeng Xie Deqiao Sun Jie Tian Zongjun Shen Lida College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics

Magnetic field was introduced in laser melting deposition to reduce the pores in *** 3-D model of the coil-deposition layer-substrate was *** results show that the electromagnetic force in deposition layer mainly concentrates in the projection area of the *** electromagnetic force shows repulsion in one *** experimental results indicate that the magnetic field is beneficial for grain refinement,microhardness increasement and decline of quantities and average sizes of pores.

关键词： laser melting deposition (LMD) finite element method electromagnetic force coil microstructure

Characterization of a FeMo cofactor-deficient MoFe protein from a nifE-deleted strain(DJ35)of Azotobacter vinelandii

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Chinese Science Bulletin 2005年第20期50卷 2305-2310页

作者： zhao Ying BIAN Shaomin ZHANG Chunxi ZHOU Huina WANG Huangping zhao jianfeng HUANG Jufu Key Laboratory of Photosynthesis and Environmental MolecuIar Physiology Institute of Botany Chinese Academy of Sciences Beijing 100093 China Graduate School Chinese Academy of Sciences Beijing 100039 China Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Bioengineering College Fujian Normal University Fuzhou 360007 China

A MoFe protein (ΔnifE Av1) with a purity of ～80% was purified from a nifE-deleted mutant of Azotobacter vinelandii DJ35. Compared with MoFe protein purified from wild-type strain OP (OP Av1), ΔnifE Av1 had the same subunits composition, and had immune reaction with antibody to OP Av1, but its relative mobility in anaerobic native polyacrylamide gel electrophoresis (PAGE) was a little larger than that of OP Av1. Metal analysis showed that Mo and Fe contents of ΔnifE Av1 both apparently decreased. When complemented with OP Fe protein, ΔnifE Av1 had no C2H2-reduction activity, but it could be in vitro activated by FeMoco extracted from OP Av1. The circular dichroism (CD) spectrum of ΔnifE Av1 at ~450 nm was similar to that of OP Av1, while the EPR signal at g≈3.7 was absolutely silent, and the signal intensities at g≈4.3 and 2.0 decreased by 75% and 50%, respectively. The results indicated that ΔnifE Av1 purified from DJ35 was a FeMoco-deficient but P-cluster-con- taining MoFe protein.

关键词： MoFe蛋白质固氮细菌纯净度 ERP 厌氧性