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Nuclear Science and Techniques 2020年第11期31卷 36-49页

作者： Muhammad Waqas Fu-Hu Liu Li-Li Li Haidar Mas’ud Alfanda Institute of Theoretical Physics and State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan 430079China

The transverse momentum spectra of different types of particles produced in central and peripheral gold–gold(Au–Au)and inelastic proton–proton(pp)collisions at the Relativistic Heavy Ion Collider,as well as in central and peripheral lead-lead(Pb–Pb)and pp collisions at the Large Hadron Collider,are analyzed by the multi-component standard(Boltzmann–Gibbs,Fermi–Dirac,and Bose–Einstein)*** obtained results from the standard distribution give an approximate agreement with the measured experimental data by the STAR,PHENIX,and ALICE *** behavior of the effective(kinetic freeze-out)temperature,transverse flow velocity,and kinetic freeze-out volume for particles with different masses is obtained,which observes the early kinetic freezeout of heavier particles as compared to the lighter *** parameters of emissions of different particles are observed to be different,which reveals a direct signature of the mass-dependent differential kinetic *** is also observed that the peripheral nucleus–nucleus(AA)and pp collisions at the same center-of-mass energy per nucleon pair are in good agreement in terms of the extracted parameters.

关键词： Transverse momentum spectra Effective temperature Kinetic freeze-out temperature Transverse flow velocity Kinetic freeze-out volume

NMR studies of stock process water and reaction pathways in hydrothermal carbonization of furfural residue

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Green Energy & Environment 2018年第2期3卷 163-171页

作者： Fen Yue Christian Marcus Pedersen Xiuyin Yan Yequn Liu Danlei Xiang Caifang Ning Yingxiong Wang Yan Qiao Institute of Coal Chemistry Chinese Academy of Sciences Institute of Process Engineering Chinese Academy of Sciences Department of Chemistry University of Copenhagen Taiyuan Supervision and Testing Station for Quality of Grain Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University

Hydrothermal carbonization(HTC) is a valuable approach to convert furfural residue(FR) into carbon material. The prepared biochars are usually characterized comprehensively, while the stock process water still remains to be studied in detail. Herein, a NMR study of the main components in stock process water generated at different HTC reaction conditions was reported. Various qualitative and quantitative NMR techniques(~1H and ^(13)C NMR,~1H-~1H COSY and ~1H-^(13)C HSQC etc.) especially 1D selective gradient total correlation spectroscopy(TOCSY NMR) were strategically applied in the analysis of HTC stock process water. Without separation and purification, it was demonstrated that the main detectable compounds are 5-hydroxymethylfurfural, formic acid, methanol, acetic acid, levulinic acid, glycerol, hydroxyacetone and acetaldehyde in this complicate mixture. Furthermore, the relationship between the concentration of major products and the reaction conditions(180-240 ℃ at 8 h, and 1-24 h at 240 ℃) was established. Finally, reasonable reaction pathways for hydrothermal conversion of FR were proposed based on this result and our previously obtained characteristics of biochars. The routine and challenging NMR methods utilized here would be an alternative other than HPLC or GC for biomass conversion research and can be extended to more studies.

关键词： NMR Hydrothermal carbonization Furfural residue Stock process water

Thermoelectric transport properties and structure of Mg_2Si_(0.8)Sn_(0.2)prepared by ECAS under different current intensities

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Rare Metals 2014年第2期33卷 215-218页

作者： Wen-Hao Fan Yuan-Yuan Jiao Rui-Xue Chen Di-Yang Wu Qing-Sen Meng Shao-Ping Chen Department of Material Science and Engineering Taiyuan University of Technology

Thermoelectric materials Mg2Si0.8Sn0.2 were sintered under three different conditions including no electricity sintering（NCS）, low electricity sintering（LCS）,and high electricity sintering（HCS）. Thermoelectric performance and microstructure of three group samples were measured and compared. The results indicate that the application of electric current during the sintering process changes the microstructure and significantly increases the density of samples, and increases the electric conductivity and the power factor. The electric current activated/assisted sintering is an effective way to obtain thermoelectric materials with excellent performance.

关键词： Thermoelectric materials Mg2Si0.8Sn0.2 ECAS Electric current

Rapid stabilization of stochastic quantum systems in a unified framework

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Chinese Physics B 2023年第7期32卷 216-225页

作者：温杰王芳敏史元浩贾建芳曾建潮 School of Electrical and Control Engineering North University of ChinaTaiyuan 030051China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China School of Computer Science and Technology North University of ChinaTaiyuan 030051China

Rapid stabilization of general stochastic quantum systems is investigated based on the rapid stability of stochastic differential *** introduce a Lyapunov-LaSalle-like theorem for a class of nonlinear stochastic systems first,based on which a unified framework of rapidly stabilizing stochastic quantum systems is *** to the proposed unified framework,we design the switching state feedback controls to achieve the rapid stabilization of singlequbit systems,two-qubit systems,and N-qubit *** the unified framework,the state space is divided into two state subspaces,and the target state is located in one state subspace,while the other system equilibria are located in the other state *** the designed state feedback controls,the system state can only transit through the boundary between the two state subspaces no more than two times,and the target state is globally asymptotically stable in *** particular,the system state can converge exponentially in(all or part of)the state subspace where the target state is ***,the effectiveness and rapidity of the designed state feedback controls are shown in numerical simulations by stabilizing GHZ states for a three-qubit system.

关键词： rapid stabilization state feedback stochastic quantum systems switching control

Experimental Investigation on Micro Deep Drawing of Stainless Steel Foils with Different Microstructural Characteristics

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Chinese Journal of Mechanical Engineering 2021年第2期34卷 179-189页

作者： Jingwei Zhao Tao Wang Fanghui Jia Zhou Li Cunlong Zhou Qingxue Huang Zhengyi Jiang College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan 030024China TYUT-UOW Joint Research Center Taiyuan University of TechnologyTaiyuan 030024China TYUT-UOW Joint Research Center University of WollongongWollongongNSW 2522Australia School of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia shanxi Provincial Key Laboratory on Metallurgical Device Design and Theory Taiyuan University of Science and TechnologyTaiyuan 030024China

In the present work,austenitic stainless steel(ASS)304 foils with a thickness of 50μm were first annealed at temperatures ranging from 700 to 1100℃for 1 h to obtain different microstructural *** the effects of microstructural characteristics on the formability of ASS 304 foils and the quality of drawn cups using micro deep drawing(MDD)were studied,and the mechanism involved was *** results show that the as-received ASS 304 foil has a poor formability and cannot be used to form a cup using *** wrinkling problem occurs on the drawn cup,and the height profile distribution on the mouth and the symmetry of the drawn cup is quite non-uniform when the annealing temperature is 700℃.At annealing temperatures of 900 and 950℃,the drawn cups are both characterized with very few wrinkles,and the distribution of height profile,symmetry and mouth thickness are uniform on the mouths of the drawn *** wrinkling becomes increasingly significant with a further increase of annealing temperature from 950 to 1100℃.The optimal annealing temperatures obtained in this study are 900 and 950℃for reducing the generation of wrinkling,and therefore improving the quality of drawn *** non-optimized microstructure,the distribution of the compressive stress in the circumferential direction of the drawn foils becomes inhomogeneous,which is thought to be the cause of the occurrence of localized deformation till wrinkling during MDD.

关键词： Microforming Micro deep drawing Stainless steel foils Wrinkling Annealing Microstructure

DYNAMICS OF A NONLOCAL DISPERSAL FOOT-AND-MOUTH DISEASE MODEL IN A SPATIALLY HETEROGENEOUS ENVIRONMENT

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Acta Mathematica Scientia 2021年第2期41卷 552-572页

作者： Xiaoyan WANG Junyuan YANG School of Information Shanxi University of Finance and EconomicsTaiyuan 030006China Complex Systems Research Center Shanxi UniversityTaiyuan 030006China

Foot-and-mouth disease is one of the major contagious zoonotic diseases in the *** is caused by various species of the genus Aphthovirus of the family Picornavirus,and it always brings a large number of infections and heavy financial *** disease has become a major public health *** this paper,we propose a nonlocal foot-and-mouth disease model in a spatially heterogeneous environment,which couples virus-to-animals and animals-to-animals transmission pathways,and investigate the dynamics of the *** basic reproduction number R_(0)is defined as the spectral radius of the next generation operator R(x)by a renewal *** relationship between R_(0)and a principal eigenvalue of an operator L_(0)is ***,the proposed system exhibits threshold dynamics in terms of R_(0),in the sense that R_(0)determines whether or not foot-and-mouth disease invades the *** numerical simulations,we have found that increasing animals'movements is an effective control measure for preventing prevalence of the disease.

关键词： Nonlocal diffusion nonlocal infection the basic reproduction number compactness

Flexible design of gradient multilayer nanofilms coated on carbon nanofibers by atomic layer deposition for enhanced microwave absorption performance

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Nano Research 2018年第1期11卷 530-541页

作者： Shichao Zhao Lili Yan Xiaodong Tian Yequn Liu Chaoqiu Chen Yunqin Li Jiankang Zhang Yan Song Yong Qin State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 03000 I China University of ChineseAcademy of Sciences Beijing 100039 China Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 China Analytical Instrumentation Center Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 China

Impedance matching is important for achieving high-efficiency microwave absorbers. The high conductivity of dielectric loss materials such as pure metals and carbon nanomaterials generally results in poor absorption owing to the low impedance matching between the absorbers and air. Carbon nanostructures are very promising candidates for high-efficiency absorption because of their attractive features including low density, high surface area, and good stability. Herein, a new strategy is proposed to improve the impedance matching of dielectric loss materials using electrospun carbon nanofibers as an example. The carbon nanofibers are coated with specifically designed gradient multilayer nanofilms with gradually increasing electroconductibility synthesized by doping ZnO with different A1203 content （AZO） by atomic layer deposition. The gradient nanofilms are composed of five layers of dielectric films, namely, pure A1203, AZO （5：1, the pulse cycle ratio of ZnO to A1203）, pure ZnO, AZO （10：1）, and AZO （20：1）. The versatile gradient films serve as intermediate layers to tune the impedance matching between air and the carbon nanofiber surfaces. Therefore, the carbon nanofibers coated with gradient films of rationally selected thicknesses exhibit remarkably enhanced microwave absorption performance, and the optimal reflection loss reaches -58.5 dB at 16.2 GHz with a thickness of only 1.8 mm. This work can help further understand the contribution of impedance matching to microwave absorption. Our strategy is general and can be applied to improve the absorption properties of other dielectric loss materials and even for applications in other fields.

关键词： atomic layer deposition conductive gradientmultilayer nanofilms electrospun carbonnanofiber microwave absorption dielectric material

Interaction of Ethylene-N,N'-dianthranilate to Ni(Ⅱ):Binding Properties and Coordination Mode Studies

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Chinese Journal of Structural Chemistry 2013年第12期32卷 1787-1792页

作者： FENG Jiao WANG Jing-Lin LIU Bin YANG Bin-Sheng Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Institute of Molecular ScienceShanxi University

The binding properties of ethylene-N,N＇-dianthranilate （EDA） and Ni（II） were studied by difference UV-Vis in 0.05 M Tris-HCl buffer （pH 7.4）. The stoichiometric ratio of EDA to nickel （1：1） was confirmed and the conditional binding constant （IogKNi-EDA = 12.33 ± 0.06） was obtained. In addition, an interesting tetranuclear complex [Nin（EDA）4]·2CH3CH2OH-9H2O was obtained unexpectedly in alcohol-water solution and characterized by X-ray crystallography and electrospray ionization mass spectra （ESI-MS）. It is found that EDA acts as a pentadentate ligand and performs a chelating-bridging coordination mode.

关键词： ethylene-N,N'-dianthranilate Ni(Ⅱ) spectrum crystal structure

Multi-scale spatial relationships between soil total nitrogen and influencing factors in a basin landscape based on multivariate empirical mode decomposition

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Journal of Arid Land 2019年第3期11卷 385-399页

作者： ZHU Hongfen CAO Yi JING Yaodong LIU Geng BI Rutian YANG Wude College of Resource and Environment Shanxi Agricultural UniversityTaigu 030801China National Experimental Teaching Demonstration Center for Agricultural Resources and Environment Shanxi Agricultural UniversityTaigu 030801China College of Agriculture Shanxi Agricultural UniversityTaigu 030801China Research Center for Scientific Development in Fenhe River Valley Taiyuan Normal UniversityJinzhong 030619China

The relationships between soil total nitrogen(STN)and influencing factors are *** objective of this study was to identify the multi-scale spatial relationships of STN with selected environmental factors(elevation,slope and topographic wetness index),intrinsic soil factors(soil bulk density,sand content,silt content,and clay content)and combined environmental factors(including the first two principal components(PC1 and PC2)of the Vis-NIR soil spectra)along three sampling transects located at the upstream,midstream and downstream of Taiyuan Basin on the Chinese Loess *** separated the multivariate data series of STN and influencing factors at each transect into six intrinsic mode functions(IMFs)and one residue by multivariate empirical mode decomposition(MEMD).Meanwhile,we obtained the predicted equations of STN based on MEMD by stepwise multiple linear regression(SMLR).The results indicated that the dominant scales of explained variance in STN were at scale 995 m for transect 1,at scales 956 and 8852 m for transect 2,and at scales 972,5716 and 12,317 m for transect ***-scale correlation coefficients between STN and influencing factors were less significant in transect 3 than in transects 1 and *** goodness of fit root mean square error(RMSE),normalized root mean square error(NRMSE),and coefficient of determination(R2)indicated that the prediction of STN at the sampling scale by summing all of the predicted IMFs and residue was more accurate than that by SMLR ***,the multi-scale method of MEMD has a good potential in characterizing the multi-scale spatial relationships between STN and influencing factors at the basin landscape scale.

关键词： intrinsic mode function multivariate empirical mode decomposition multi-scale spatial relationship sampling transect soil total nitrogen Chinese Loess Plateau

Identifying candidate genes involved in trichome formation on carrot stems by transcriptome profiling and resequencing

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Journal of Integrative Agriculture 2022年第12期21卷 3589-3599页

作者： WU Zhe YANG Xuan ZHAO Yu-xuan JIA Li College of Horticulture Shanxi Agricultural UniversityTaigu 030801P.R.China Key Laboratory of Genetic Improvement and Ecophysiology of Horticultural Crop of Anhui Province Institute of HorticultureAnhui Academy of Agricultural SciencesHefei 230001P.R.China

Trichomes are specialized structures developed from epidermal cells and can protect plants against biotic and abiotic *** cover carrots during the generative ***,the morphology of the carrot trichomes and candidate genes controlling the formation of trichomes are still *** study found that carrot trichomes were nonglandular and unbranched hairs distributed on the stem,leaf,petiole,pedicel,and seed of *** analysis of a trichome mutant with sparse and short trichomes(sst)and a wild type(wt)with long and dense trichomes on carrot stems was conducted.A total of 15396 genes containing nonsynonymous mutations in sst were obtained,including 42 trichomerelated *** also analyzed the transcriptome of the trichomes on secondary branches when these secondary branches were 10 cm long between wt and sst and obtained 6576 differentially expressed genes(DEGs),including 24 trichome-related ***-PCR validation exhibited three significantly up-regulated DEGs,20 significantly downregulated,and one with no *** considered both the resequencing and transcriptome sequencing analyses and found that 12 trichome-related genes that were grouped into five transcription factor families containing nonsynonymous mutations and significantly down-regulated in ***,these genes are potentially promising candidate genes whose nonsynonymous mutations and down-regulation may result in scarce and short trichomes mutation on carrot stems in sst.

关键词： carrot trichome resequencing transcriptome candidate genes