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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第11期14卷 767-777页

作者： Qi-yin ZHU yin-fu jin Zhen-yu yin Pierre-Yves HICHER Department of Civil Engineering Shanghai Jiao Tong University LUNAM University Ecole Centrale de NantesGeM UMR CNRS 6183 Nantes France

The parameters obtained from oedometric consolidation tests are commonly used in the development of constitutive modeling and for engineering practice. This paper focuses on the influence of the natural deposition plane orientation on oedometric consolidation behavior of three natural clays from the southeast coast of China. Oedometer tests were conducted on intact specimens prepared by sampling at a series of angles relative to the natural deposition plane. For each specimen, yield stress,compressibility indexes, secondary compression, and permeability coefficients were determined. The influence of the sampling angle on these properties was investigated, revealing that yield stress, compression index, swelling index, creep index, ratio of secondary compression coefficient to compression index(Cae/Cc) and permeability coefficient were all dependent to some extent on the sampling angle. These findings indicate the role of the anisotropy due to the natural deposition on the oedometric consolidation behavior.

关键词： Clay Compressibility Consolidation Creep Permeability Natural deposition

List 2-distance Coloring of Planar Graphs with Girth Five

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Acta Mathematicae Applicatae Sinica 2022年第3期38卷 540-548页

作者： yin-dong jin Lian-ying MIAO School of Mathematics China University of Mining and TechnologyXuzhou 221116China

A 2-distance coloring of a graph is a coloring of the vertices such that two vertices at distance at most two receive distinct colors.A list assignment of a graph G is a mapping L which assigns to each vertex v a set L(v)of positive *** list 2-distance chromatic number of G denoted byχ_(2)^(l)(G)is the least integer k for which G is list 2-distance *** this paper,we prove that every planar graph with g(G)≥5 and△(G)≥40 is list 2-distance(△(G)+4)-colorable.

关键词： 2-distance coloring list 2-distance coloring girth maximum degree

Flocking of a Cucker–Smale Type Model with Compactly Supported Interaction Functions

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Acta Mathematica Sinica,English Series 2024年第9期40卷 2285-2296页

作者： Chun yin jin Shuang Zhi LI College of Science China Agricultural UniversityBeijing 100083P.R.China

How to analyze flocking behaviors of a multi-agent system with local interaction functions is a challenging problem in *** and Tadmor in 2011 also stressed the significance to assume that the interaction function is rapidly decaying or cut-off at a finite distance(*** and Tadmor in ***.2011).In this paper,we study the flocking behavior of a Cucker–Smale type model with compactly supported interaction *** properties of a connected stochastic matrix,together with an elaborate analysis on perturbations of a linearized system,we obtain a sufficient condition imposed only on model parameters and initial data to guarantee ***,it is shown that the system achieves flocking at an exponential rate.

关键词： Cucker-Smale model local interaction flocking stochastic matrix neighbor graph

Physical simulation of mixing on a C-H2 smelting reduction reactor with different tracer feeding positions

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Journal of Iron and Steel Research International 2020年第9期27卷 1018-1034页

作者： jin-yin Xie Bo Wang Jie-yu Zhang State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and EngineeringShanghai UniversityShanghai 200072China

With the growing demand for energy saving,emission reduction,and green metallurgy,we had designed a new C-H2 smelting reduction *** order to solve the key problem that the heat transfer efficiency from high temperature oxidation zone in upper region to low temperature reduction zone in lower region is low in traditional metallurgical reduction reactor,a water simulation was adopted to optimize the mean residence time and to improve the transmission efficiency within the *** to the modified Froude similarity,a water model experimental reactor with a ratio of 1:1 to the prototype was *** the prototype,the feed port was used to feed preheated ore and *** order to simulate the effect of different feeding positions of the tracer on the mixing behavior in the molten pool,four points of tracer feeding position were arranged for a systematic *** the same time,based on double-row side nozzle with thick slag layer in a C-H2 smelting reduction reactor,nine influencing factors,including relative angle between upper and lower side nozzles,were *** experimental results showed that the tracer feeding position had a great influence on the mean residence time,and the relative angle also had a great influence on tracer feeding ***,through comprehensive analysis,the optimal condition parameters were obtained under different tracer feeding *** results provide valuable help for the design and optimization of the C-H2 smelting reduction reactor.

关键词： Smelting reduction reactor Tracer feeding position Double-row side blowing Mean residence time Relative angle Horizontal angle Vertical angle

Study of Nonpolaritons in a Kerr Nonlinear Optical Resonator

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Communications in Theoretical Physics 2006年第6期45卷 1107-1111页

作者： WAN jin-yin CHENG Ze Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

We find that in a Kerr nonlinear optical resonator, the photon system possesses a new kind of quasiparticle, the nonpolariton. The existence of nonpolaritons should be testified by observing the energy density dependence of the velocity and squeezing of nonpolaritons. As we have investigated, the transition energy density of a Kerr nonlinear optical resonator is larger than that of a normal state.

关键词： Kerr nonlinear resonator nonpolariton average energy density

Three-dimensional numerical analysis of the interaction of two crossing tunnels in soft clay

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Underground Space 2019年第4期4卷 310-327页

作者： jin yin-Fu Zhu Bing-Qing yin Zhen-Yu Zhang Dong-Mei Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina China Development Bank Sichuan Branch No.120Tiantai RoadGaoxin DistrictChengduSichuan ProvinceChina Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji UniversityShanghai 200092China Department of Geotechnical Engineering Tongji UniversityShanghai 200092China

Recently,with the development of underground construction,multi-tunnel engineering has become a matter of concern since the interaction between tunnels at close ranges could cause additional deformation in strata as well as surrounding structures and even serious damage to surface *** tunnel displacement and soil deformation problems can be effectively predicted using numerical methods considering the influence of various factors,such as the anisotropic nature of soft *** this end,the anisotropic elastoplastic constitutive S-CLAY1 is implemented in finite element code to investigate deformation problems in the strata and nearby structures caused by the excavation of *** paper focuses in particular on configurations of two crossing *** 3D numerical simulations using ABAQUS enable successive analyses conducted for tunnels at different spacings(1.5D,2.5D,3.5D and 4.5D,where D is the tunnel diameter)of configurations aligned *** results,including the ground settlement,lining force and moment,and tunnel convergence,are *** each aspect,the most unfavorable case is determined by comparing the results of different *** investigation can provide a reference for multi-tunnels design and construction.

关键词： Multi-tunnels Anisotropy Clay Ground loss Finite element Constitutive relation

Bifurcations of Limit Circles and Center Conditions for a Class of Non-analytic Cubic Z_2 Polynomial Differential Systems

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Acta Mathematica Sinica,English Series 2012年第11期28卷 2275-2288页

作者： Feng LI Yi Rong LIU yin Lai jin School of Science Linyi University School of Mathematical Science and Computing Technology Central South University

In this paper, bifurcations of limit cycles at three fine focuses for a class of Z2-equivariant non-analytic cubic planar differential systems axe studied. By a transformation, we first transform non- analytic systems into analytic systems. Then sufficient and necessary conditions for critical points of the systems being centers are obtained. The fact that there exist 12 small amplitude limit cycles created from the critical points is also proved. Henceforth we give a lower bound of cyclicity of Z2-equivaxiant non-analytic cubic differential systems.

关键词： Non-analytic center-focus problem Lyapunov constant limit cycles bifurcation

Intelligent modelling of clay compressibility using hybrid meta-heuristic and machine learning algorithms

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Geoscience Frontiers 2021年第1期12卷 441-452页

作者： Pin Zhang Zhen-Yu yin yin-Fu jin Tommy HTChan Fu-Ping Gao Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina School of Civil Engineering&Built Environment Science and Engineering FacultyQueensland University of Technology(QUT)BrisbaneQld4001Australia Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing100190China China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China

Compression index Ccis an essential parameter in geotechnical design for which the effectiveness of correlation is still a *** paper suggests a novel modelling approach using machine learning(ML)*** performance of five commonly used machine learning(ML)algorithms,***-propagation neural network(BPNN),extreme learning machine(ELM),support vector machine(SVM),random forest(RF)and evolutionary polynomial regression(EPR)in predicting Cc is comprehensively investigated.A database with a total number of 311 datasets including three input variables,*** void ratio e0,liquid limit water content wL,plasticity index Ip,and one output variable Cc is first *** algorithm(GA)is used to optimize the hyper-parameters in five ML algorithms,and the average prediction error for the 10-fold cross-validation(CV)sets is set as thefitness function in the GA for enhancing the robustness of ML *** results indicate that ML models outperform empirical prediction formulations with lower prediction *** yields the lowest error followed by BPNN,ELM,EPR and *** the ranges of input variables in the database are large enough,BPNN and RF models are recommended to predict ***,if the distribution of input variables is continuous,RF model is the best ***,EPR model is recommended if the ranges of input variables are *** predicted correlations between input and output variables using five ML models show great agreement with the physical explanation.

关键词： Compressibility Clays Machine learning Optimization Random forest Genetic algorithm

Arsenic and chromate removal from water by iron chips-Effects of anions

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Frontiers of Environmental Science & Engineering 2008年第2期2卷 203-208页

作者： Ruihua ZHANG Hongwen SUN jin yin College of Environmental Science and Engineering Nankai UniversityTianjin 300071China College of Science Tianjin University of Science and TechnologyTianjin 300222China

The purpose of this study is to estimate the removal efficiency of As and Cr(VI)by one kind of industrial waste–iron chips,as well as to estimate the effects of typical inorganic anions(sulfate,phosphate,and nitrate),and typical organic anions(citrate,oxalate,and humate)on As or Cr(VI)*** results showed that 98%of As(V)and 92%of As(III)could be removed from aqueous phase by the iron chips within 60 *** with As species,Cr(VI)was removed much more rapidly and efficiently with 97%of Cr(VI)being removed within 25 *** removal efficiency for arsenic was in the order:As(III)(sulfate),As(III)(nitrate)or As(III),As(III)(humate),As(III)(oxalate),As(III)(citrate),As(III)(phosphate),and for chromate was in the order:Cr(VI)(sulfate),Cr(VI)(phosphate)or Cr(VI)(nitrate)or Cr(VI)(oxalate),Cr(VI),Cr(VI)(citrate),Cr(VI)(humate).In all the treatments,pH level increased with time except for As(III),the removal of which was either without anions or in the presence of humate or nitrate.

关键词： arsenic chromate iron chips permeable reactive barrier remediation groundwater

List Injective Coloring of Planar Graphs

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Acta Mathematicae Applicatae Sinica 2022年第3期38卷 614-626页

作者： yin-dong jin Lian-ying MIAO School of Mathematics China University of Mining and TechnologyXuzhou 221116China

A k-coloring of a graph G is a mapping c:V(G)→{1,2,···,k}.The coloring c is called injective if any two vertices have a common neighbor get distinct colors.A graph G is injectively k-choosable if for any color list L of admissible colors on V(G)of size k allows an injective coloringφsuch thatφ(v)∈L(v)for each v∈V(G).Letχ;(G),χ;(G)denote the injective chromatic number and injective choosability number of G,*** this paper,we show thatχ;(G)≤△+4 if△≥22 andχ;(G)≤△+5 if△≥15,where G is a triangle-free planar graph and without intersecting 4-cycles.

关键词： planar graph injective coloring list coloring