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Performance Comparison of Two Meta-Model for the Application to Finite Element Model Updating of Structures

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Journal of Harbin Institute of Technology(New Series) 2014年第3期21卷 68-78页

作者： Yang Liu de-jun wang jun Ma Yang Li School of Transportation Science and Engineering Harbin Institute of Technology

To investigate the application of meta-model for finite element( FE) model updating of structures,the performance of two popular meta-model,i. e.,Kriging model and response surface model( RSM),were compared in detail. Firstly,above two kinds of meta-model were introduced briefly. Secondly,some key issues of the application of meta-model to FE model updating of structures were proposed and discussed,and then some advices were presented in order to select a reasonable meta-model for the purpose of updating the FE model of structures. Finally,the procedure of FE model updating based on meta-model was implemented by updating the FE model of a truss bridge model with the measured modal parameters. The results showed that the Kriging model was more proper for FE model updating of complex structures.

关键词： finite element model updating of structures meta-model kriging model response surface model

Fine structure characterization of an explosively-welded GH3535/316H bimetallic plate interface

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International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1811-1820页

作者： Jia Xiao Ming Li Jian-ping Liang Li Jiang de-jun wang Xiang-xi Ye Ze-zhong Chen Na-xiu wang Zhi-jun Li School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Dalian National Laboratory for Clean Energy Dalian 116023China Ministry of Ecology and Environment Beijing 100135China Institute of Zhejiang University-Quzhou Quzhou 324004China

An explosion-welded technology was induced to manufacture the GH3535/316H bimetallic plates to provide a more cost-effective structural material for ultrahigh temperature,molten salt thermal storage *** microstructure of the bonding interfaces were extensively investigated by scanning electron microscopy,energy dispersive spectrometry,and an electron probe *** bonding interface possessed a periodic,wavy morphology and was adorned by peninsula-or island-like transition *** higher magnification,a matrix recrystallization region,fine grain region,columnar grain region,equiaxed grain region,and shrinkage porosity were observed in the transition zones and surrounding *** backscattered diffraction demonstrated that the strain in the recrystallization region of the GH3535 matrix and transition zone was less than the *** concentration occurred at the interface and the solidification defects in the transition *** dislocation substructure in 316H near the interface was characterized by electron channeling contrast imaging.A dislocation network was formed in the grains of *** microhardness decreased as the distance from the welding interface increased and the lowest hardness was inside the transition zone.

关键词： GH3535/316H bimetallic plate ultrahigh temperature molten salt explosive welding interface structure dislocation substructure

Effect of Atmospheric Interfering Absorption on Measurement of BTX by DOAS

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Chinese Journal of Chemical Physics 2008年第3期21卷 202-210页

作者： Fu-min Peng Pin-hua Xie Hai-yang Li Ying-hua Zhang jun-de wang Wen-qing Liu Key Laboratory of Environmental Optical and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 China College of Chemistry and Chemical Engineering Anhui University Hefei 230039 China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

It was reported on the elimination of interfering absorption of BTX. the absorption of O2 includes different absorption bands, which change differently when the partial pressure of oxygen is varied. These cause the nonlinear absorption of O2 and the observed band shape to vary with the column density of O2. The absorption ratios of molecular absorption in each of the Herzberg bands and dimer absorptions, as well as the contribution to the correction error of molecular absorption, are studied based on the characteristic of these absorption bands. The optimized way to eliminate the interfering absorption is obtained in the end and the effectiveness of using interpolation proposed by Volkamer et al. to remove O2 absorption is proved again. As to O2 and SO2, the effect of the thermal effect of characteristic spectra on the elimination error of their absorption is studied. Solutions to these problems are discussed and demonstrated together with methods to optimize the interpolation of spectra. As a sample application, differential optical absorption spectroscopy （DOAS） measurements of BTX are carried out. Results show a low detection limit and the good correlation with point instruments are achieved. All these prove the feasibility of using spectral interpolation to improve the accuracy of DOAS measurements of aromatic hydrocarbons for practical purposes.

关键词： Differential optical absorption spectroscopy BTX Herzberg band O2 dimer

Passivation of carbon dimer defects in amorphous SiO_2/4H–SiC(0001) interface:A first-principles study

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Chinese Physics B 2018年第4期27卷 376-383页

作者： Yi-Jie Zhang Zhi-Peng Yin Yan Su de-jun wang Liaoning Integrated Circuit Technology Key Laboratory School of Control Science and Engineering Faculty of Electronic Information and Electrical Engineering Dalian University of Technology Dalian 116024 China School of Physics Dalian University of Technology Dalian 116024 China

An amorphous SiO2/4 H–Si C（0001） interface model with carbon dimer defects is established based on density functional theory of the first-principle plane wave pseudopotential *** structures of carbon dimer defects after passivation by H2 and NO molecules are established,and the interface states before and after passivation are calculated by the Heyd–Scuseria–Ernzerhof（HSE06） hybrid functional *** results indicate that H2 can be adsorbed on the O2–C = C–O2 defect and the carbon–carbon double bond is converted into a single ***,H2 cannot be adsorbed on the O2–（C = C）′ –O2 *** NO molecules can be bonded by N and C atoms to transform the carbon–carbon double bonds,thereby passivating the two *** study shows that the mechanism for the passivation of Si O2/4 H–SiC（0001） interface carbon dimer defects is to convert the carbon–carbon double bonds into carbon ***,some intermediate structures that can be introduced into the interface state in the band gap should be avoided.

关键词： 4H-SiC interface defect density of states firstprinciple

Wheat Grain Yield and Yield Stability in a Long-Term Fertilization Experiment on the Loess Plateau

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Pedosphere 2007年第2期17卷 257-264页

作者： HAO Ming-de FAN jun wang Quan-Jiu DANG Ting-Hui GUO Sheng-Li wang Ji-jun Institute of Soil and Water Conservation Chinese Academy of Sciences Yangling 712100 （China）. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation Chinese Academy of Sciences Yangling 712100 （China） Northwest A ＆ F University Yangling 712100 （China）

To provide a scientific basis for sustainable land management, a 20-year fertility experiment was conducted in Changwu County, Shaanxi Province, China to investigate the effects of long-term application of chemical fertilizers on wheat grain yield and yield stability on the Loess Plateau using regression and stability analysis. The experiment consisted of 17 fertilizer treatments, containing the combinations of different N and P levels, with three replications arranged in a randomized complete block design. Nitrogen fertilizer was applied as urea, and P was applied as calcium superphosphate. Fertilizer rates had a large effect on the response of wheat yield to fertilization. Phosphorus, combined with N, increased yield significantly （P 〈 0.01）. In the unfertilized control and the N or P sole application treatments, wheat yield had a declining trend although it was not statistically significant. Stability analysis combined with the trend analysis indicated that integrated use of fertilizer N and P was better than their sole application in increasing and sustaining the productivity of rainfed winter wheat.

关键词： dryland wheat yield long-term fertilization nitrogen phosphorus yield stability

Modification of Nylon Membrane Used for Affinity Adsorption

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Chinese Chemical Letters 2000年第2期11卷 165-166页

作者： Hong Yu GAN Zhen Hua SHANG jun de wang (Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116012) Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116012 China

Nylon membrane was modified by binding with polyhydroxyl-containing materials to increase its hydrophilicity and reduce its nonspecific interaction with proteins. The effect of binding hydrophilic materials on amount of ligand bound-Cibacron Blue F3GA (CBF) was investigated. Experimental data showed that the amount of CBF bound can be increased significantly after binding of hydrophilic materials.

关键词： nylon membrane modification hydrophilic materials affinity adsorption

Nitric Oxide Emission Following Wetting of Dry Soils in Subtropical Humid Forests

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Pedosphere 2009年第6期19卷 692-699页

作者： LI de-jun and wang Xin-Ming 2 State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 (China) State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 (China)

Information about soil nitric oxide （NO） emissions from subtropical forests is quite limited, and even less is known about the pulse emission of NO when wetting soils after a long period of dryness. In this study, we measured NO fluxes following wetting of dry soft in a broadleaf forest and a pine forest in subtropical China. Large pulses of NO fluxes were observed after soil wetting in both forests. NO fluxes increased significantly within 0.5 h following wetting in both forests and reached peak 1 and 4 h after soil wetting in the pine forest and the broadleaf forest, respectively. In the broadleaf forest, averaged peak flux of NO pulses was 157 ng N m^-2 s^-1, which was 8 times the flux value before wetting, and in the pine forest, the averaged peak flux was 135 ng N m-2 s 1, which was 15.5 times the flux value before wetting. The total pulses-induced NO emissions during the dry season were roughly estimated to be 29.4 mg N m^-2 in the broadleaf forest and 22.2 mg N m^-2 in the pine forest or made up a proportion of 4.6% of the annual NO emission in the broadleaf forest and 5.3% in the pine forest.

关键词： dry season flux. NO. pulse subtropical China

Preparation of Cibacron Blue F3GA Bonded Poly (styrenedivinylbenzene) (PSDVB) Microbeads Used for High Performance Affinity Chromatography

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Chinese Chemical Letters 1999年第7期10卷 583-586页

作者： Li SHEN Bo Hui XIONG Run Zhi CONG jun de wang(Dalian Institute of Chemical Physics. The Chinese Academy of Sciences. Dalian 116012) Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116012 China

Rigid PSDVB microbeads have been modified with poly(vinyl alcohol) (PVA) adsorbed on their surface to produce an affinity medium. Then Cibacron Blue F3GA was covalently attached to the supports. The initial concentration of PVA has effect on the adsorption of PVA. The non-specific interaction of bovine serum albumin (BSA) on the microbeads decreases with the PVA adsorbed. The pH stability test shows that the affinity medium is stable up to pH 11.0. And it has specific interaction with lysozyme, but not with pepsin.

关键词： PSDVB microbeads PVA affinity medium Cibacron Blue F3GA

A　COMPARATIVE　STUDY　ON　THE　PHOTOVOLTAIC　PROPERTIES　OF　BUCKMINSTERFULLERENE　（C60）　AND　ITS　ANION　SALT

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Chinese Chemical Letters 1996年第4期7卷 351-352页

作者： Zhan jun YU Peng ZHANG Lin Song LI de jun wang Wen Sheng GUO Tie Jin LI(deprtment of Chemistry,Jilin University,Changchun 130023)(department of Chemistry,Liaoning Normal University, Dalian 116029) department of Chemistry Jilin University Changchun 130023 department of Chemistry Liaoning Normal University Dalian 116029

Measurements of Surface Photovoltage Spectroscopy(SPS)Were carried out for C60(A)and its anion salt(B)for the first *** a reference of UV-vis spectra,the results for SPS are discussed in terms of Molecular Orbit(MO) and Surface Photovoltage(SPV)theory. By a comperison between(A)and(B)'s characteristic responses is SPS,a deeper insisht into the nature of their photovoltaic properties is obtained.

关键词： ITS C60 SALT AND ANION