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A multi-source data fusion modeling method for debris flow prevention engineering

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Journal of Mountain Science 2021年第4期18卷 1049-1061页

作者： XU qing-yang YE jian LYU Yi-jie Faculty of Geoscience and Environmental Engineering Southwest Jiao tong UniversityChengdu 611756China

The Digital Elevation Model(DEM)data of debris flow prevention engineering are the boundary of a debris flow prevention simulation,which provides accurate and reliable DEM data and is a key consideration in debris flow prevention ***,this paper proposes a multi-source data fusion ***,we constructed 3D models of debris flow prevention using virtual reality technology according to the relevant *** 3D spatial data generated by 3D modeling were converted into DEM data for debris flow prevention ***,the accuracy and applicability of the DEM data were verified by the error analysis testing and fusion testing of the debris flow prevention ***,we propose the Levels of Detail algorithm based on the quadtree structure to realize the visualization of a large-scale disaster prevention *** test results reveal that the data fusion method controlled the error rate of the DEM data of the debris flow prevention engineering within an allowable range and generated 3D volume data(obj format)to compensate for the deficiency of the DEM data whereby the 3D internal entity space is not ***,the levels of detailed method can dispatch the data of a large-scale debris flow hazard scene in real time to ensure a realistic 3D *** summary,the proposed methods can be applied to the planning of debris flow prevention engineering and to the simulation of the debris flow prevention process.

关键词： Debris flow prevention Level of detail Debris flow simulation Multi platform fusion Multi source data fusion

Synthesis, Crystal Structure, and Magnetic Properties of a Co Metal-organic Framework with Mixed Dicarboxylate and Tricarboxylate Ligands

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Chinese Journal of Structural Chemistry 2016年第2期35卷 257-263页

作者： LI Wen-Bin GAO Zhu-qing gu Jin-Zhong School of Chemical and Biological Engineering Taiyuan University of Science and Technology College of Chemistry and Chemical Engineering Lanzhou University

One new mixed-ligand coordination polymer,namely[Co2（btc）（bpdc）（0.5）（py）3]n（1）,was hydrothermally synthesized using biphenyl-2,4,4＇-tricarboxylic acid（H3btc） as a main building block,along with two auxiliary ligands（H2bpdc = 2,2＇-bipyridine-5,5＇-dicarboxylic acid and py =pyridine）.The product 1 was characterized by IR spectroscopy,elemental,thermogravimetric,and single-crystal X-ray diffraction ***-crystal X-ray diffraction studies show that compound 1 possesses an intricate 3D metal-organic framework based on tetracobalt（Ⅱ） *** susceptibility measurement indicates that compound 1 shows an antiferromagnetic coupling between the Co（Ⅱ） ions.

关键词： metal-organic framework carboxylate ligand magnetic properties

Biodegradation kinetic of organic compounds of acrylic fiber wastewater in biofilm

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Journal of Environmental Sciences 2003年第6期15卷 757-761页

作者： ZHANG Ya-lei ZHAO jian-fu gu guo-wei State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China.

A group function relation curve between flux(J) and bulk phase concentration of substrate(S) was set up. The biodegradation kinetic of organic compounds of acrylic fiber wastewater in biofilm is studied(the treatment technology is coagulation/sedimentation-anoxic/aerobic biofilm process), and the results showed that the concentration of non-degradation pollutants in effluent is 77 mg/L. In aerobic zone, the half-rate constant is 72.84 mg/L, the maximum removal rate of organic compounds at unit area filler is very low, 0.089 g/(m 2·d), which corresponds to the fact that there are some biorefractory compounds in the wastewater.

关键词： acrylic fiber wastewater biodegradation kinetic organic compounds biofilm

Dietary fishmeal replacement by Clostridium autoethanogenum protein meal influences the nutritional and sensory quality of turbot(Scophthalmus maximus)via the TOR/AAR/AMPK pathways

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Animal Nutrition 2024年第3期18卷 84-95页

作者： Zezheng Qi Nan Bai qing Li Shihui Pan Min gu Marine College Shandong UniversityWeihaiShandongChina Key Laboratory of Modern Marine Ranching Technology of Weihai WeihaiShandongChina

Clostridium autoethanogenum protein(CAP)is a promising protein source for aquaculture;however,how CAP influences fish quality is worth extensive *** randomly allocated 630 turbot with initial body weights of about 180 g into 6 groups,with fishmeal-based control diet or diet with CAP replacing 15%(CAP15),30%(CAP30),45%(CAP45),60%(CAP60),or 75%(CAP75)of fishmeal *** a 70-d feeding trial,the fillet yield(P=0.015)and content of protein(P=0.017),collagen(P 0.05).By contrast,the muscle hardness increased linearly with increasing CAP(P=0.004),accompanied by linear reduction of muscle fiber area(P=0.003)and expression of myogenesis-related genes,including cathepsin D(ctsdP<0.001)and muscle ring finger protein 1(murf 1,P<0.001).Phosphorylation of protein kinase B(Akt,P<0.001),target of rapamycin(TOR,P=0.001),eukaryotic initiation factor 4E-binding protein 1(4E-BP1,P<0.001),and ribosomal protein S6(S6,P<0.001)decreased linearly;however,phosphorylation of AMP-activated protein kinase(AMPK,P<0.001),eukaryotic initiation factor 2α(eIF2α,P<0.001),and the abundance of activating transcription factor 4(ATF4,P<0.001)increased with increasing CAP,suggesting that the TOR signaling pathway was inhibited,and the amino acid response(AAR)and AMPK pathways were ***,expression of genes related to protein degradation,including myogenic factor 5(myf 5,P<0.001),myogenic differentiation(myod,P<0.001),paired box 7(pax 7,P<0.001),and ctsd(P<0.001),decreased linearly with increasing *** conclusion,CAP could be used to replace up to 15%of fishmeal without negatively impacting turbot ***,higher levels of CAP decreased fillet yield,muscle protein content,and muscle fiber diameter while increasing muscle hardness,which could be attributed to the inhibition of the TOR pathway and activation of the AAR and AMPK pathways.

关键词： Bacterial meal Clostridium autoethanogenum Turbot Fish quality Muscle growth

Flow Separation and Vortex Dynamics in Waves Propagating over A Submerged Quartercircular Breakwater

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China Ocean Engineering 2018年第5期32卷 514-523页

作者： jianG Xue-lian YANG Tian ZOU qing-ping gu Han-bin Tianjin Key Laboratory of Soft Soil Characteristics & Engineering Environment Tianjin Chengjian University State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University The Lyell Centre for Earth and Marine Science and Technology Institute for Infrastructure and EnvironmentHeriot-Watt University School of Naval Architecture &Mechanical-Electrical Engineering Zhejiang Ocean University

The interactions of cnoidal waves with a submerged quartercircular breakwater are investigated by a ReynoldsAveraged Navier–Stokes(RANS) flow solver with a Volume of Fluid(VOF) surface capturing scheme(RANSVOF) model. The vertical variation of the instantaneous velocity indicates that flow separation occurs at the boundary layer near the breakwater. The temporal evolution of the velocity and vorticity fields demonstrates vortex generation and shedding around the submerged quartercircular breakwater due to the flow separation. An empirical relationship between the vortex intensity and a few hydrodynamic parameters is proposed based on parametric analysis. In addition, the instantaneous and time-averaged vorticity fields reveal a pair of vortices of opposite signs at the breakwater which are expected to have significant effect on sediment entrainment, suspension, and transportation,therefore, scour on the leeside of the breakwater.

关键词： submerged quartercircular breakwater cnoidal wave flow separation vortex dynamics scour

Asymmetric Synthesis and Crystal Structure of a Bioactive Morpholine Derivative

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Chinese Journal of Structural Chemistry 2007年第5期26卷 515-518页

作者： WANG jian-Ping FU Yong-Ju WANG jian-Ge QIN jian-Hua CHEN qing-Hua Department of Chemistry Luoyang Normal University Luoyang 471022China Chemical Engineering ＆ Pharmaceutics College Henan Universityof Science and Technology Luoyang 471003 China

A novel morpholine derivative was synthesized by Michael addition/internal nucleophilic substitution of 4-（L）-menthyloxy（1R,2S,5R）-butenolide with phenyl-glyalcohol under mild condition, and its structure was determined by X-ray diffraction. The target compound belongs to orthorhombic, space group P212121 with a = 5.7729（7）, b = 11.5032（14）, c = 25.161（3）A, Mr = 319.35, Z = 4, V = 1670.8（4）A^3, Dc = 1.270 g/cm3, μ（MoKα） = 0.094 mm^-1, F（000） = 680, Flack = 0.01（2）, R = 0.0398 and wR = 0.0914.

关键词： morpholine derivative α-phenyl-glyalcohol,4-(L)-menthyloxy-butenolide asymmetric synthesis

Grain boundary characteristics and tensile properties of Ti14 alloy after semi-solid deformation

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International Journal of Minerals,Metallurgy and Materials 2011年第5期18卷 576-581页

作者： Yong-nan Chen jian-feng Wei Yong-qing Zhao School of Materials Science and Engineering Chang＇an University Xi＇an 710064 China State Key Laboratory for Mechanical Behavior of Materials Xi＇an Jiaotong University Xi＇an 710049 China Northwest Institute for Nonferrous Metal Research Xi＇an 710016 China

The microstructure and room-temperature tensile properties of Ti14,a new α＋Ti2Cu alloy,were investigated after conventional forging at 950°C and semi-solid forging at 1000 and 1050°C,*** show that coarse grains and grain boundaries are obtained in the semi-solid *** coarse grain boundaries are attributed to Ti2Cu phase precipitations occurred on the grain boundaries during the *** is found that more Ti2Cu phase precipitates on the grain boundaries at a higher semi-solid forging temperature,which forms precipitated zones and coarsens the grain *** tests exhibit high strength and low ductility for the semi-solid forged alloys,especially after forging at 1000°*** analysis reveals the evidence of ductile failure mechanisms for the conventional forged alloy and cleavage fracture mechanisms for the alloy after semi-solid forging at 1050°C.

关键词： titanium alloys semi-solid forging grain boundaries tensile properties fracture

Effects of SiO_(2) on the preparation and metallurgical properties of acid oxidized pellets

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International Journal of Minerals,Metallurgy and Materials 2021年第4期28卷 629-636页

作者： jian-guang Lu Chen-chen Lan qing Lyu Shu-hui Zhang jian-ning Sun School of Metallurgy Northeastern UniversityShenyang 110819China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063009China HBIS Group Hansteel Company Handan 05600China

The effects of SiO_(2) content on the preparation process and metallurgical properties of acid oxidized pellets, including compressive strength, reduction, and softening–melting behaviors, were systematically *** structures, elemental distribution, and pore size distribution were varied to analyze the mechanism of the *** results show that with an increase in SiO_(2) content from 3.51 wt%to 7.18 wt%, compressive strength decreases from 3150 N/pellet to 2100 N/pellet and reducibility decreases from 76.5% to 71.4%.The microstructure showed that pellets with high SiO_(2) content contained more magnetite in the mineralogical ***, some liquid phases appeared, which hindered the continuous crystallization of ***, the softening–melting properties of the pellets clearly deteriorated as the SiO_(2) content *** increasing SiO_(2) content, the temperature range of the softening–melting zone decreased, and the maximum differential pressure and the comprehensive permeability index increased *** acid oxidized pellets are used as the raw materials for blast furnace smelting, it should be combined with high basicity sinters to improve the softening–melting behaviors of the comprehensive charge.

关键词： acid oxidized pellets SiO_(2)content metallurgical property mineralogical structure

Hemin-histamine-montmorillonite clay conjugate as a model biocatalyst to mimic natural peroxidase

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Science China Chemistry 2015年第4期58卷 731-737页

作者： Lihui Zhang Cheng gu jian Xiong Mei Yang Yong guo State Key Laboratory of Pollution Control & Resource Reuse School of the Environment Nanjing University

We successfully synthesized the first hemin-montmorillonite bio-conjugate with an amino acid residue to mimic natural peroxidase enzyme. Histamine was intercalated in montmorillonite by cation exchange, then a heroin molecule was loaded onto the histamine-montmorillonite with an adsorption capacity of 7.0 mg· g^-1. The hemin-histamine-montmorillonite conjugate shows high peroxidase activity as indicated by the oxidation of guaiacol, which is attributed to the activation of hemin by Fe-N complex formation between the imidazole group in histamine and the iron ion in the hemin molecule. Temperaturedependent peroxidase activity for this synthesized biomimetic material indicates that raising the reaction temperature could significantly enhance the activity of the conjugate. The biomimetic catalyst has good reusability; nearly 100% activity can be retained after three cycles. Because montmorillonite clay is widely distributed in the environment, this material offers great potential for in situ and ex situ remediation of many organic contaminants in surface/subsurface soils.

关键词： hemin-histamine-montmorillonite conjugates imidazole biomimetic catalyst peroxidase activity recycle