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Transport of Propylene Carbonate-LiTFSI Electrolytes in P(VDF-HFP)Using time-resolved ATR-FtiR Spectroscopy:Diffusion Coefficients and Molecular Interactions

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Chinese Journal of Polymer Science 2021年第8期39卷 975-983,I0005页

作者： hui-Xian Li Lei Hou Pei-Yi wu National Engineering Research Center for Dyeing and Finishing of Textiles College of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China

The time-resolved attenuated total reflectance-Fourier transform infrared(ATR-FtiR)spectroscopy is employed to investigate the transport mechanism of gel electrolytes by monitoring the diffusion behavior of propylene carbonate-lithium bis(trifluoromethylsulfonyl)imide(PC-LiTFSI)solution through poly(vinylidene fluoride-co-hexafluoropropylene)(P(VDF-HFP))*** behavior has been observed for both TFSr and *** temperature leads to faster diffusion of TFSI'and PC,which could be related to the increased free volume in P(VDF-HFP)matrix and rapid molecular movements upon *** molecular interactions among LiTFSI,PC and P(VDF-HFP)have been *** the diffusion process,PC molecules,in the form of small clusters,can firstly diffuse through the P(VDF-HFP)film and interact with P(VDF-HFP)by dipole-dipole interaction,acting as the ***,Li+diffuses into P(VDF-HFP)with the help of ion-dipole interactions between Li+and C=0 of ***,TFSI-diffuses through the polymer matrix in solvation *** addition,slight ion-dipole interactions between Li+and P(VDF-HFP)have been observed as *** in this work contribute to a better understanding of transport process in gel polymer electrolytes for lithium-ion batteries and support the development of improved gel polymer electrolytes by rationally regulating molecular interactions.

关键词： ATR-FtiR spectroscopy Gel polymer electrolyte Transport mechanism Molecular interaction Diffusion coefficient

Designing a New Lattice Model to Simulate Low-molecular-weight Block Copolymers for Nanolithographic Applications

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Chinese Journal of Polymer Science 2022年第4期40卷 413-420页

作者： Jia-Ping wu Bao-hui Li Qiang Wang School of Physics Nankai UniversityTianjin 300071China Department of Chemical and Biological Engineering Colorado State UniversityFort Collins CO 80523-1370USA

A new lattice model is designed to be suitable for simulating low-molecular-weight block copolymer(BCP)melts currently used in experiments to achieve sub-10 nm domain sizes(i.e.,having an invariant degree of polymerization between 10^(2) and 10^(3)).It gives an isothermal compressibility comparable to real polymers such as polystyrene and poly(methyl methacrylate),high Monte Carlo simulation efficiency,and the fluctuation effects important for the low-molecular-weight *** its high lattice coordination number,the model can also be readily used for branched chains such as star BCPs.

关键词： Lattice model Block copolymers Fluctuations

Effects of Different Calcining Temperatures on the Properties of Ceramsite Prepared by High-carbon Gasification Slag

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Journal of wuhan University of Technology(Materials Science) 2023年第2期38卷 292-298页

作者： wu Feng LI hui LI Taizhi MA Xudong College of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an710055China State Key Laboratory of Green Building in Western China Xi’an University of Architecture and TechnologyXi’an710055China Shaanxi Ecological Cement&Concrete Engineering Technology Research Center Xi’an710055China

The structure and characteristics of high-performance lightweight aggregates produced by high-carbon gasification slag were investigated by X-ray diffraction,scanning electron microscopy,thermogravimetry/differential thermogravimetr,differential scanning calorimetry-Fourier transform infrared,and mercury intrusion porosimetry,*** experimental results show that the ceramsite undergoes two weightless stages in the calcining *** the increase in the calcining temperature,a large number of pores are formed inside the ceramsite,its structure becomes denser,but the calcining temperature band of the ceramsite becomes *** crystalline phase of the ceramsite changes at different calcining temperatures and the mineral phase changes from the earlieralbite,quartz,oligoclase,hematite,etc,to a silica-aluminum-rich glass *** 1130℃ is a more suitable calcining temperature,and the cylinder compressive strength of ceramics is 11.59 MPa,the packing density,apparent density,porosity,and water absorption are 939.11 kg/m^(3),1643.75 kg/m^(3),28.11%,and 10.35%,respectively,which can meet the standards for high-strength lightweight aggregates.

关键词： high-carbon gasification slag ceramsite concrete physical property

Improved uncertainty propagation method of dynamic model for Mars entry spacecraft

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航空动力学报 2014年第5期29卷 1223-1233页

作者： FU hui-min XIAO Qiang wu Yun-zhang Research Center of Small Sample Technology Beijing University of Aeronautics and Astronautics

In order to research the uncertainty propagation laws of Mars entry dynamic equations for the Mars entry phase,an improved method was presented for analyzing the effect of the initial state uncertainties and uncertainty factor on the system state in the state *** applying the method to the entry phase of one of the NASA Mars exploration missions,the simulation results agreed well with the Monte Carlo method,especially the flight path angle simulation at least reaching 92%.It is found that the improved method can not only predict the uncertainty propagation laws with high accuracy of at least 92%in flight path angle simulation and large application scope from-0.1degree to 0.1degree,compared with local linearization method,but also save several hours relative to Monte Carlo method.

关键词：不确定性传播规律动态方程月出入高精度的改进方法

The Stability of Imitation Dynamics with Continuously Distributed Delays

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Journal of Systems Science & Complexity 2023年第5期36卷 2067-2081页

作者： FANG Caiya YANG hui PI Jinxiu wu Wenjun School of Mathematics and Statistics Guizhou UniversityGuizhou 550025China Guizhou Provincial Key Laboratory for Games Decision Making and Control SystemsGuiyang 550025China

This paper investigates imitation dynamics with continuously distributed *** realistic technological,economic,and social environments,individuals are involved in strategic interactions simultaneously while the influences of their decision-making may not be observable *** shows that there exists a time delay *** distributions of delay are further considered to efficiently lucubrate the stability of interior equilibrium in the imitation dynamics with continuous distributions of delay in the two-strategy game ***,when the delay follows the uniform distributions and Gamma distributions,the authors present that interior equilibrium can be asymptotically ***,when the probability density of the delay is general density,the authors also determine a sufficient condition for stability derived from the expected *** but not least,the interested but uncomplicated Snowdrift game is utilized to demonstrate our theoretical results.

关键词： Continuous distributed delay evolutionary games imitation dynamics stability

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Numerical investigation on the drag characteristics of supercritical water flow past a sphere

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Science China(Technological Sciences) 2020年第8期63卷 1509-1519页

作者： wu ZhenQun OU GuoBiao REN YiFei JIN hui State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi'an 710049China

Numerical simulation has become a useful approach to explore the complex physical and chemical process inside the supercritical water(SCW)fluidized bed *** to the drastic and non-linear variation of water properties near pseudocritical point,the flow field and drag coefficient of SCW flow past a cold particle are considerably different from that of conventional ***,in this work,particle-resolved numerical investigation is conducted to study the flow field and drag characteristics under the influence of the special water properties *** varying the enthalpy corresponding to the particle surface temperature,which will be called the particle surface enthalpy for short,in a wide range,it realizes the study under different properties variation *** simulated results demonstrate that the variations of drag coefficient versus Reynolds number(Re)and particle surface enthalpy are in good regularity when taking the freestream temperature as reference *** drag coefficient is enhanced greatly at high enthalpy difference between particle surface and inflow,and the enhancement is mainly contributed by that of the frictional drag ***,the drag coefficient variations under different pressures are in good agreement when cases are set with the same inflow and particle surface enthalpies,*** fitting the simulated results,a new drag coefficient correlation is developed for Re range of 10–200 with consideration of the influence of the special properties *** fitting quality is good that the maximum deviation between the new correlation and simulated data is 13.92%,and the mean deviation is 3.67%.

关键词： supercritical water numerical simulation sphere drag coefficient

Effects of chromium on the microstructure and hot ductility of Nb-microalloyed steel

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International Journal of Minerals,Metallurgy and Materials 2021年第6期28卷 1011-1021页

作者： Yang Liu Yan-hui Sun Hao-tian wu Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China

It is well-known that the surface quality of the niobium microalloy profiled billet directly affects the comprehensive mechanical properties of the *** effects of chromium on theγ/αphase transformation and high-temperature mechanical properties of Nb-microalloyed steel were studied by Gleeble tensile and high-temperature in-situ observation *** indicated that the starting temperature of the γ→αphase transformation decreases with increasing Cr *** hot ductility of Nb-microalloyed steel is improved by adding 0.12wt% *** atoms inhibit the diffusion of carbon atoms,which reduces the thickness of grain boundary *** number fractions of high-angle grain boundaries increase with increasing chromium *** particular,the proportion is up to 48.7% when the Cr content is 0.12wt%.The high-angle grain boundaries hinder the crack propagation and improve the ductility of Nb-microalloyed steel.

关键词： phase transformation hot ductility chromium high-angle grain boundaries grain boundary ferrite

Identification and Control of Typical Industrial Process

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Journal of Central South University 2000年第3期12卷 165-169页

作者： PENG hui wu Shao-cheng College of Information Science and Engineering Central South UniversityChangsha 410083China

Many industrial processes such as heating furnaces have over damping dynamic characteristics. Based on an innovative impulse response model, a method of identification and control for the over damping plant is introduced in the paper. The number of parameters of the model is much less than conventional impulse response model. The model based on tuning procedure of numerical optimum PID controller parameters is presented. For an actual instance, a large scale airflow circulatory resistance furnace control system with cascades of time delays is developed. In the system, the optimum PID control is used in the inner loop. A nonlinear PI compensation control is applied in the outer loop. The coordinating control among each output is realized by a fuzzy control strategy. A process surveillance organization monitors running situation of system and tunes controller parameters.

关键词： over damping dynamics time delay cascade plant impulse response sequence identification optimal PID parameters numerical PID controller coordinating control

Genome-Wide Identification of the GST Gene Family in Loquat (Eriobotrya japonica Lindl.) and Their Expression under Cold Stress with ALA Pretreatment

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Phyton-International Journal of Experimental Botany 2024年第11期93卷 2715-2735页

作者： Guanpeng Huang ti wu Yinjie Zheng Qiyun Gu Qiaobin Chen Shoukai Lin Jincheng wu College of Life Sciences Fujian Agriculture and Forestry UniversityFuzhou350002China College of Environmental and Biological Engineering Putian UniversityPutian351100China College of JunCao Science and Ecology(College of Carbon Neutrality) Fujian Agriculture and Forestry UniversityFuzhou350002China

Loquat(Eriobotrya japonica Lindl.),a rare fruit native to China,has a long history of cultivation in *** temperature is the key factor restricting loquat growth and severely affects *** temperature induces the regeneration and metabolism of reduced glutathione(GSH)to alleviate stress damage via the participation of glu-tathione S-transferases(GSTs)in *** this study,16 GSTs were identiﬁed from the loquat genome according to their protein sequence similarity with Arabidopsis *** the basis of domain characteristics and phyloge-netic analysis of AtGSTs,these EjGSTs can be divided into 4 subclasses:Phi,Theta,Tau and *** basic prop-erties,subcellular localization,structures,motifs,chromosomal distribution and collinearity of the EjGST proteins or genes were further *** and segmental gene duplications play pivotal roles in EjGST ***-elements that respond to various hormones and stresses,especially those associated with low-temperature responsiveness,were predicted to be present in the promoters of ***,analysis of gene expression proﬁles revealed that 9 of 16 EjGSTs may be involved in the low-temperature responsiveness of loquat *** agriculture,5-aminolevulinic acid(ALA),a potential multifunctional plant growth regulator,can improve the stress response of *** the 9 low-temperature-responsive EjGSTs,the expression of EjGSTU1 and EjGSTF1 signiﬁcantly differed under cold stress in response to exogenous 5-aminolevulinic acid(ALA)*** remarkable increase in GST activity and GSH/GSSG ratio reﬂected the increase in the cold response ability of loquat plants caused by exogenous ALA,thereby alleviating H2O2 accumulation and membrane lipid ***,this study provides an initial exploration of the cold tolerance function of GSTs in loquat,offering a theoretical foundation for the development of cold-resistant loquat cultivars and new antifreeze agents.

关键词： Loquat GST gene family identiﬁcation gene expression cold stress ALA