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Corrosion science general-purpose data model and interface (I): Meanings and issues of design and implementation

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Science china(Technological Sciences) 2008年第9期51卷 1394-1401页

作者： TANG ZiLong School of Materials Science and Engineering, tianjin University, tianjin 3.0072, china 1. School of Materials Science and Engineering Tianjin University Tianjin 300072 China

A brand new design of integrated corrosion information system is introduced to meet the constantly increasing demands of material corrosion information. Two concepts, "general-purpose corrosion data model" and "public corrosion data ex-changing interface", are suggested to integrate a wide variety of corrosion data sources based on detailed analysis on characteristics of each source in order to promote the information sharing and data mining. The architecture of integrated corrosion information environment is blueprinted. The insight analysis is focused on 1) architecture of the system; 2) data flow and information sharing; 3. roles of system players and their interactions; 4) approaches to data integration. Several key issues are addressed in detail including coverage of data model, data source integration and mitigation, and data granularity from system performance and model acceptance points of view. At the end, the design and implementation ap-proach of general corrosion data model is presented based on cutting edge IT techniques.

关键词： corrosion multi-source data modeling integrated information system

DISCOVERY OF NEW FOSSIL SPIDERS IN AMBER OF FUSHUN COALFIELD

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Science in china,Ser.B 1982年第4期25卷 431-437页

作者：洪友崇 tianjin Institute of Geology and mineral resources Ministry of Geology

A new genus, Sinodictyna （Archanda）, has been obtained from amber on the main coalbeds of the Gucheggzi Formation (E2g1), Fush?n Coalfield In Liaoning Province. It suggeststhat Sinodictyna belongs to a regional form in china and that it differs from European Balticamber Eolathys in the chelate teeth, pedipal, walking legs and its appendages. New genusdiscovered first in china fills in tlie gaps in the field of paleontology of china.

关键词： length

Surface configurations during annealing of sputter-deposited NiTi thin films

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Chinese Science Bulletin 1997年第23期42卷 2019-2020页

作者： GONG Fengfei, JIANG Enyong, SHEN Huimin and WANG Yening1. Department of Applied Physics, tianjin University, tianjin 3.0072 The National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008 Center for Advanced Studies in Science and Technology of Microstructures, Nanjing 210093. china 2. Department of Physics, tianjin University, tianjin 3.0072, china 3. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008, Center for Advanced Studies in Science and Technology of Microstructures, Nanjing 210093. china. Department of Applied Physics Tianjin University Tianjin The National Laboratory of Solid State Microstructures Nanjing University Nanjing Center for Advanced Studies in Science and Technology of Microstructures Nanjing China Department of Physics Tianjin University Tianjin China National Laboratory of Solid State Microstructures Nanjing University Nanjing

SPUTTER-DEPOSITED NiTi thin films are becoming more and more important because of their po-tential applications to the intelligent thin-film systems. The as-deposited NiTi thin films pre-pared by magnetron sputtering are generally amorphous. Because the amorphous NiTi thinfilms cannot show shape memory effect, they should be crystallized under appropriate anneal-

关键词： NiTi Surface configurations during annealing of sputter-deposited NiTi thin films

Synthesis and Crystal Structure of Rctt-1-(2-benzoxazolyl)-2-(4-chlorophenyl)-4-phenyl-3.(4-pyridinyl)cyclobutane

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Chinese Journal of Structural Chemistry 2003年第1期22卷 65-69页

作者： ZHUANG Jun-Peng ZHANG Wen-Qin② (Department of Chemistry, tianjin University, tianjin 3.0072, china) tianjin Univ Dept Chem Tianjin 300072 Peoples R China

The title compound (C28H21ClN2O, Mr = 43..92) was synthesized by the cross- photodimerization of (E)-2-(2-phenylethenyl)benzoxazole and (E)-4-[2-(4-chlorophenyl)ethenyl]- pyridine in sulfuric acid solution. Its molecular structure has been unequivocally determined by X-ray crystallography. The title compound belongs to triclinic system, space group P?with cell parameters: a = 9.648(3., b = 10.458(4), c = 12.106(4) , a = 89.089(7), b = 75.644(6), g = 68.441(7)? V = 1096.7(7) 3. Z = 2, Dc = 1.3.3.g/cm3. F(000) = 456 and m(MoKa) = 0.198 mm-1. The final R and wR are 0.0627 and 0.12.5, respectively for 173. observed reflections with I > 2s(I). S = 0.921 and (/s)max = 0.001. The cyclobutane ring has a puckered conformation with four different aryl groups substituted on each carbon atom. The dihedral angles of the cyclobutane ring are 20.2 and 20.6? The bond distances of the cyclobutane ring are 1.541, 1.555, 1.560 and 1.563.? respectively, which are slightly longer than that of the normal CC single bond. The title compound is the only cross-dimer and its two heteroaryl groups are situated at the trans-1,3.position of the cyclobutane ring, revealing that the cross-photodimerization proceeds in a head-to-tail pattern with high stereo-selectivity.

关键词： cyclobutane photodimerization crystal structure

Diffraction of plane SV waves by a cavity in poroelastic half-space

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Earthquake Engineering and Engineering Vibration 2009年第1期8卷 29-46页

作者： Liang Jianwen and Liu Zhongxian Department of Civil Engineering, tianjin University, tianjin 3.0072, china Professor PhD Candidate Department of Civil Engineering Tianjin University Tianjin 300072 China

This paper presents an indirect boundary integration equation method for diffraction of plane SV waves by a 2-D cavity in a poroelastic *** Green＇s functions of compressive and shear wave sources are derived based on Biot＇s theory. The scattered waves are constructed using fictitious wave sources close to the boundary of the cavity, and their magnitudes are determined by the boundary conditions. Verification of the accuracy is performed by：（1） checking the satisfaction extent of the boundary conditions, （2） comparing the degenerated solutions of a single-phased case with well- known solutions, and （3. examining the numerical stability of the solutions. The nature of diffraction of plane SV waves around a cavity in a poroelastic half-space is investigated by numerical examples.

关键词： poroelastic half-space cavity diffraction plane SV waves compressive wave source shear wave source Green's function pore pressure

A QUASI-NEWTON METHOD IN INFINITE-DIMENSIONAL SPACES AND ITS APPLICATION FOR SOLVING A PARABOLIC INVERSE PROBLEM

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Journal of Computational Mathematics 1998年第4期16卷 305-318页

作者： Wen-huan Yu(Department of Mathematics, tianjin University, tianjin 3.0072, P.R. china.) tianjin Univ Dept Math Tianjin 300072 Peoples R China

A Quasi-Newton method in Infinite-dimensional Spaces (QNIS) for solving operator equations is presellted and the convergence of a sequence generated by QNIS is also proved in the paper. Next, we suggest a finite-dimensional implementation of QNIS and prove that the sequence defined by the finite-dimensional algorithm converges to the root of the original operator equation providing that the later exists and that the Frechet derivative of the governing operator is invertible. Finally, we apply QNIS to an inverse problem for a parabolic differential equation to illustrate the efficiency of the finite-dimensional algorithm.

关键词： Quasi-Newton method parabolic differential equation inverse problems in partial differential equations linear and Q-superlinear rates of convergence

Estimates of Central Moments for One Kind of Exponential-Type Operators

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Transactions of tianjin University 2011年第2期17卷 85-88页

作者：宋占杰杨振东叶培新 School of Sciences Tianjin University Institute of TV and Image Information Tianjin University School of Mathematics and LPMC Nankai University

In this paper,the explicit estimates of central moments for one kind of exponential-type operators are *** estimates play an essential role in studying the explicit approximation properties of this family of *** the proposed method,the results of Ditzian and Totik in 1987,Guo and Qi in 2007,and Mahmudov in 2010 can be improved respectively.

关键词： exponential-type operator central moment approximation property Stirling series

β→α Transformation of γ-Phase in Sintered WC-Co Cemented Carbides

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Journal of Materials Science & Technology 1996年第5期12卷 398-400页

作者： Shourong LIU (tianjin Institute of Hard Alloy tianjin 3.0222, china)Yi LIU (Shandong University Jinan 250100, china) SHANDONG UNIV JINAN 250100PEOPLES R CHINA

Varying the morphology and the structure of γ-phase (Co-base Co-W-C solid solution) by means of altering the cooling rate and the preparing method of liquid sintered WC-Co cemented carbides samples, the mechanism of fcc→hcp transformation of γ-phase in WC-Co alloy has been explored. The results show that, the cooling rate is an important affecting factor on fcc→hcp transformation of γ-phase and the fcc→hcp transformation is mainly a diffusive type when cooling WC-Co samples above room temperature

关键词： WC Co Phase in Sintered WC-Co Cemented Carbides Transformation of

Two-photon spectroscopic behaviors and photodynamic effect on the BEL-7402 cancer cells of the new chlorophyll photosensitizer

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Science china Chemistry 2008年第6期51卷 529-538页

作者： ZHAO PeiDe1,2,CHEN Ping1,TANG GuoQing1,LIU JinWei2,LIN Lie1,GUO Peng1,YU Qing2, YAO JianZhong3.MA DongMing4,ZHANG GuiLan1 & CHEN WenJu1 1 Key Laboratory of Optoelectronic Information Science and Technology,Ministry of Education,Institute of Modern Optics,Nankai University,tianjin 3.0071,china 2 Department of Physics,Hebei University of Technology,tianjin 3.013.,china 3.College of Pharmacy,Second Military Medical University,Shanghai 20043.,china 4 tianjin College of the Traditional Chinese Medicine,tianjin 3.0193.china 1. Key Laboratory of Optoelectronic Information Science and Technology Ministry of Education Institute of Modern Optics Nankai University Tianjin 300071 China 2. Department of Physics Hebei University of Technology Tianjin 300130 China 3. College of Pharmacy Second Military Medical University Shanghai 200433 China 4. tianjin College of the Traditional Chinese Medicine Tianjin 300193 China

The spectroscopic properties of a new chlorophyll derivate photosensitizer (CDP) are studied under the excitation wavelengths at 800 and 400 nm using femtosecond pulses from a Ti: sapphire laser. The damaging effect of CDP on the BEL-7402 cancer cells is also investigated upon two-photon illumination at 800 nm. The normalized fluorescence spectra of CDP in tetrahydrofuran (THF) show that two-photon and one-photon spectra have the same distributions and the same emission bands (675 nm). The lifetimes of two- and one-photon induced fluorescence of this molecule are of the order of 5.0 ns. By comparing the data it is shown that there is some difference between the two lifetimes, but the difference is less than one nanosecond. The two-photon absorption cross section of the molecule is also measured at 800 nm and estimated as about σ'_2 ≈ 3..5x10^(-50)cm^4·s·photon^(-1). The results of two-photon photodynamic therapy (TPPDT) tests show that CDP can kill all of the tested cancer cells according to the usual Eosine assessment. Our results indicate that the two-photon-induced photophysical, photochemical and photosensitizing processes of CDP may be basically similar to those of one-photon excitation. These behaviors of the sample suggest that one may find other possible methods to estimate some photosensitizers' effects in details such as their distribution in cells and the reactive targets of the sub-cellular parts of some tumor cells via two-photon excitation techniques.

关键词： photosensitizer chlorophyll derivate two-photon fluorescence two-photon absorption cross-section TPPDT BEL-7402 cell