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Applied Mathematics and Mechanics(English Edition) 2024年第9期45卷 1655-1664页

作者： Yurun WU lu li lianhe li School of Mathematics and Science Inner Mongolia Normal UniversityHohhot 010022China Inner Mongolia Applied mathematics Center Hohhot 010022China Key Laboratory of Infinite Dimensional Hamiltonian System and Its Algorithm Application Ministry of EducationHohhot 010022China

On account of the Mori-Tanaka approach,the effective elastic performance of composites containing decagonal symmetric two-dimensional(2D)quasicrystal(QC)coatings is *** expressions for the effective elastic constants of rare-earth QC reinforced magnesium-based composites are *** discussion is presented on the effects of the volume fraction of the inclusions,the aspect ratio of the inclusions,the coating thickness,and the coating material parameters on the effective elastic constants of the *** results indicate that considering the coating increases the effective elastic constants of the composites to some extent.

关键词： Mori-Tanaka approach coated inclusion decagonal symmetric twodimensional(2D)quasicrystal(QC)

A novel feature extraction method for ship-radiated noise

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Defence Technology（防务技术） 2022年第4期18卷 604-617页

作者： Hong Yang lu-lu li Guo-hui li Qian-ru Guan School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’anShaanxi710121China

To improve the feature extraction of ship-radiated noise in a complex ocean environment,a novel feature extraction method for ship-radiated noise based on complete ensemble empirical mode decomposition with adaptive selective noise(CEEMDASN) and refined composite multiscale fluctuation-based dispersion entropy(RCMFDE) is *** is proposed in this paper which takes into account the high frequency intermittent components when decomposing the *** addition,RCMFDE is also proposed in this paper which refines the preprocessing process of the original signal based on composite multi-scale ***,the original signal is decomposed into several intrinsic mode functions(IMFs)by *** distribution ratio(EDR) and average energy distribution ratio(AEDR) of all IMF components are ***,the IMF with the minimum difference between EDR and AEDR(MEDR)is selected as characteristic *** RCMFDE of characteristic IMF is estimated as the feature vectors of ship-radiated ***,these feature vectors are sent to self-organizing map(SOM) for classifying and *** proposed method is applied to the feature extraction of ship-radiated *** result shows its effectiveness and universality.

关键词： Complete ensemble empirical mode decomposition with adaptive noise Ship-radiated noise Feature extraction Classification and recognition

Kinetics of non-catalyzed hydrolysis of tannin in high temperature liquid water

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第5期9卷 401-406页

作者： li-li lu Xiu-yang lu Nan MA Institute of Pharmaceutical Engineering Department of Chemical and Biochemical Engineering Zhejiang University Hangzhou 310027 China

High temperature liquid water(HTLW) has drawn increasing attention as an environmentally benign medium for organic chemical reactions,especially acid-/base-catalyzed reactions. Non-catalyzed hydrolyses of gallotannin and tara tannin in HTLW for the simultaneous preparation of gallic acid(GA) and pyrogallol(PY) are under investigation in our laboratory. In this study,the hydrolysis kinetics of gallotannin and tara tannin were determined. The reaction is indicated to be a typical consecutive first-order one in which GA has formed as a main intermediate and PY as the final product. Selective decomposition of tannin in HTLW was proved to be possible by adjusting reaction temperature and time. The present results provide an important basic data and reference for the green preparation of GA and PY.

关键词： High temperature liquid water Gallotannin Tara tannin Non-catalyzed hydrolysis Kinetics

A Feasible and Novel Multi-Generation System Taking Advantage of Two-Stage Compressor for luxury Hotels

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Journal of Thermal Science 2021年第3期30卷 817-827页

作者： li Hongqiang ZHOU Saiqun HE Changjie DENG lu li lu li Shuisheng ZHANG Guoqiang College of Civil Engineering Hunan UniversityChangsha 410082China National Center for International Research Collaboration in Building Safety and Environment(NCIRCBSE) Hunan UniversityChangsha 410082China Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan UniversityChangsha 410082China 3rd Construction Co. Ltd of China Construction Fifth EngineeringChangsha 410004China Key Laboratory for Damage Diagnosis of Engineering Structures of Hunan Province Hunan UniversityChangsha 410082China Ltd of China Construction Fifth Engineering Changsha 410004China

In order to satisfy heating,cooling and domestic hot water demand and energy conversion in luxury hotels,a feasible and novel multi-generation system taking advantage of the two-stage compressor was proposed and *** feature of this novel system is that the compressing power can be reduced and domestic water can be generated at the same time by adopting two-stage compressors instead of conventional one-stage compressor with a high compressing *** energy-saving mechanism and two operating modes were introduced in *** a further way,the thermodynamic performance was calculated by Aspen Plus so as to make a better understanding of this novel *** the calculation results showed that,in summer and transition seasons operating mode,the system can obtain COP(Coefficient of Performance)7.3,and 60℃ domestic hot water,when evaporating temperature is 4℃;while,in winter season operating mode,the system can obtain COP 3.1,and 58℃ domestic hot water,when evaporating temperature is-24℃.Compared with the conventional independent systems,this system can achieve higher energy-efficient,higher waste heat recovery,reduce energy consumption,and meet multiple energy demands simultaneously.

关键词： two-stage compression building energy conversion heat recovery district energy systems energy saving multi-energy output

The Exceptional Set for Sums of Unlike Powers of Primes

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Acta Mathematica Sinica,English Series 2014年第11期30卷 1897-1904页

作者： li lu ZHAO School of Mathematics Hefei University of Technology

It is established that all even positive integers up to N but at most O（N15/16＋ε） exceptions can be expressed in the form p1^2＋ p2^3＋ p3^4＋ p4^5,where p1,p2,p3 and p4 are prime numbers.

关键词： Circle method Waring–Goldbach problem exceptional set

Molecular dynamics simulations of membrane deformation induced by amphiphilic helices of Epsin,Sar1p,and Arf1

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Chinese Physics B 2018年第3期27卷 544-550页

作者： Zhen-lu li Department of Physiology and Biophysics Case Western Reserve UniversityCleveland 44106USA Department of Physics Nanjing UniversityNanjing 210093China

The N-terminal amphiphilic helices of proteins Epsin,Sarlp,and Arfl play a critical role in initiating membrane *** interactions of these amphiphilic helices with the lipid membranes are investigated in this study by combining the all-atom and coarse-grained *** the all-atom simulations,the amphiphilic helices of Epsin and Sarlp are found to have a shallower insertion depth into the membrane than the amphiphilic helix of Arfl,but remarkably,the amphiphilic helices of Epsin and Sat lp induce higher asymmetry in the lipid packing between the two monolayers of the *** insertion depth of amphiphilic helix into the membrane is determined not only by the overall hydrophobicity but also by the specific distributions of polar and non-polar residues along the *** directly compare their ability to deform the membrane,the coarse-grained simulations are performed to investigate the membrane deformation under the insertion of multiple helices.

关键词： cell membrane amphiphilic helix membrane deformation molecular simulation

Tailoring the Texture and Mechanical Properties of Textured-AZ31 Mg Alloy Sheets by Twinning and Recrystallization

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Acta Metallurgica Sinica(English Letters) 2022年第12期35卷 1983-1995页

作者： Hui-Hu lu You li li lu Wang-Gang Zhang Wei liang School of Mechanical Engineering North University of ChinaTaiyuan 030051China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

In this study,a method of corrugated width limit alignment processes(CWLA)was applied to pre-twin in hot-rolled Mg alloy *** microstructure evolution and mechanical properties of the CWLA sheets were *** results demonstrated that the grain orientation was transformed from strong basal texture to RD-rotated texture after CWLA treatment and up to 22.2%of{10-12}tensile twin boundaries were produced in the *** 60±5°twin variant pairs were dominant in the twinned *** kinds of dynamic recrystallization(DRX)mechanism,i.e.,continuous DRX(CDRX)at low-temperature CWLA and the discontinuous DRX(DDRX)at high-temperature condition were *** post-annealing,the twin-induced static recrystallization(SRX)and abnormal grain growth were observed in the CWLA samples,and most twin boundaries were *** CAWL for 60 min at 300℃ and post annealing,an improvement on plasticity and strength were achieved with 55%increment for uniform elongation(UE)and 10%increment for ultimate tensile strength(UTS).

关键词： Magnesium alloy Corrugated width limit alignment processes Tension twinning Dynamic recrystallization Mechanical properties

Dynamic coding in the hippocampus during navigation

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Zoological Research 2022年第6期43卷 1023-1025页

作者： Jia-li Long li lu Key Laboratory of Animal Models and Human Disease Mechanisms of Yunnan Province Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650201China National Research Facility for Phenotypic&Genetic Analysis of Model Animals(Primate Facility) Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650107China Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghai 200031China

Spatial navigation, which enables animals to move in an oriented way, is a complex, dynamic behavior fundamental for everyday survival. Animals navigate their environments using cognitive maps, which are internal representations of external space acquired by the brain through integration of multisensory cues. Deficits in spatial navigation skills are often preclinical signs of Alzheimer’s disease in seniors and neurodevelopmental disorders in children and adolescents(Coughlan et al., 2018;Faedda et al., 2022).

关键词： Alzheimer everyday

L^p-estimates on a ratio involving a Bessel process

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第1期8卷 158-163页

作者： lu li-gang YAN li-tan XIANG li-chi Basic College Zhejiang Wanli University Ningbo 315101 China Department of Mathematics College of Science Donghua University Shanghai 200051 China

Let Z=（ Zt）t≥0 be a Bessel process of dimension δ（ δ〉0） starting at zero and let K（t） be a differentiable function on [0,∞） with K（t）〉0 （A↓t≥0）. Then we establish the relationship between L^p-norm of log^1/2（1 ＋δJτ） and L^p-norm of sup Zt[t＋k（t）]^-1/2 （0≤t≤τ） for all stopping times τ and all 0〈p〈＋∞.As an interesting example, we show that ｜｜log^1/2（1＋δLm＋1（τ）｜｜p and ｜｜supZtП[1＋Lj（t]^1/2｜｜p （0≤j≤m,j∈Z;0≤t≤τ） are equivalent with 0〈p〈＋∞ for all stopping times rand all integer numbers m, where the function Lm（t）（t≥0） is inductively defined by Lm＋1（t）=log[ 1 ＋Lm（t）] with L0（t）= 1.

关键词： Bessel processes Diffusion process Ito's formula Domination relation

Meteorological satellite stakeholder relationship network based on social network analysis

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Journal of Systems Engineering and Electronics 2021年第4期32卷 907-926页

作者： li lu liU Yupeng HE Kongxin School of Economics and Management Harbin Institute of TechnologyWeihai 264209China

The meteorological satellite service range is extensive,and science and technology and related industries have become beneficiaries of *** complex meteorological satellite stakeholder relationship warrants quantitative *** study investigates the meteorological satellite stakeholder relationship network to provide a new research perspective for meteorological satellites in the field of *** literature analysis,16 meteorological satellite stakeholders are identified through keyword screening,classified,and coded.A meteorological satellite stakeholder relationship network model is then constructed through social network analysis(SNA).Ego,local,and overall networks are analyzed from three perspectives to measure the network principle and to form a relationship network coordination degree evaluation *** improved analytic hierarchy process(AHP)-fuzzy comprehensive evaluation method is then used to determine index weights and evaluate the relationship network coordination process design *** empirical analysis,data for the meteorological satellite Fengyun-4 are obtained through questionnaire survey and literature ***6 is used to generate relationship networks and analyze various stakeholder roles and status,stakeholder relationship network coordination degree,and evaluation *** results demonstrate that the competent meteorological satellite department,the meteorological administration,the National Meteorological Centre,and the government are in the center of the Fengyun-4 stakeholder relationship network,with coordination degree in an“average”***,establishing a stakeholder coordination mechanism may strengthen connection and promote the development of meteorological undertakings.

关键词： meteorological satellite stakeholder relationship network coordination degree