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Uniqueness and stability of solution for Cauchy problem of degenerate quasilinear parabolic equations

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science china Mathematics 2005年第5期48卷 583-593页

作者： ZHAO Junning & ZHAN Huashui Department of Mathematics, Xiamen university, Xiamen 361005, china {2. of science, Jimei university, Xiamen 361000, china 1. Department of Mathematics Xiamen University 361005 Xiamen China 2. school of science Jimei University 361000 Xiamen China

The uniqueness and existence of BV-solutions for Cauchy problem of the form are proved.

关键词： Cauchy problem degenerate parabolic equation uniqueness of solution.

Research and Implementation of DICOM Format Conversion on Medical Images

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Chinese Journal of Biomedical Engineering(English Edition) 2003年第4期12卷 144-150页

作者： LIU Xu-xun 1, LI Kai-yang 1, YANG Xuan-dong 1, ZOU Yong 1ZHENG Xiao-hua 2.LI Mao-jin 2. YUAN Jia-ji 2. HU Hong-yue 2. College of Physics and Technology, wuhan university, wuhan, 430072. china2.The People’s Hospital of wuhan university, wuhan, 430060, china

Based on an object-oriented technique and by means of middle-ware, format conversion between DICOM data on medical images and conventional image/video files has been accomplished. As a result, the current large number of imaging facilities that do not accord with DICOM standard in Chinese hospitals can be linked to PACS easily. Inversely, the DICOM data acquired by digital imaging facilities can be easily converted to conventional images/ media files.

关键词： DICOM PACS Format conversion

Immunoenhancing activity of protopanaxatriol-type ginsenoside-F3 in murine spleen cells

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Acta Pharmacologica Sinica 2004年第12期25卷 105-110页

作者： Jun-li YU, De-qiang DOU2. Xiao-hong CHEN, Hong-zhen YANG, Na GUO2.Gui-fang CHENG3 Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medicalsciences, Peking Union MedicalCollege, Beijing 100050 Departmentof Natural ProductsChemistry, Shenyang Pharmaceutical university, Shenyang 110001, {2. 2 Department of Pharmacology Institute of Materia Medica Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100050 China

AIM: To investigate the immunoenhancing activity of ginsenoside-F3 inmurine spleen cells andexplore itsmechanism. METHODS: The enhancing effect of ginsenoside-F3 on murine spleen cell proliferation was studied using [3H] thymidine incorporation assay. Effects of ginsenoside-F3 on the production of type 1 cytokines IL-2. IFN-γ, and type 2.cytokines IL-4 and IL-10 from murine spleen cells were detected by ELISA method. Effects of ginsenoside- F3 on mRNA level of cytokines IL-4, IFN-γ, and transcription factors T-bet and GATA-3 were evaluated by RT- PCR analysis. Effect of ginsenoside-F3 on NF-κB DNA binding activity in murine spleen cells was investigated by electrophoretic mobility shift assays (EMSA). RESULTS: Ginsenoside-F3 at 0.1-100 μmol/L not only promoted the murine spleen cell proliferation, but also increased the production of IL-2.and IFN-γ, while decreased the production of IL-4 and IL-10 from murine spleen cells with the maximal effect at 10 μmol/L. RT-PCR analysis displayed that ginsenoside-F3 enhanced the IFN-γ and T-bet gene expression and decreased IL-4 and GATA-3 gene expression. EMSA experiment showed that ginsenoside-F3 10 μmol/L enhanced the NF-κB DNA binding activity induced by ConA in murine spleen cells. CONCLUSION: Ginsenoside-F3 has immunoenhancing activity by regu- lating production and gene expression of type 1 cytokines and type 2.cytokines in murine spleen cells.

关键词： ginsenoside F3 immunity cytokines transcription factors

The radio structure of BL Lac object S5 2.07+777

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science china(Physics,Mechanics & Astronomy) 2010年第S1期53卷 187-190页

作者： WU ZhongZu1,3,GU MinFeng2.& CHEN YongJun2.1 College of science,Guizhou university,Guiyang 55002.,{2. 2.Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of sciences,Shanghai 2.0030,{2. 3 NAOC-GZU Sponsored Center for Astronomy,Guizhou university,Guiyang 55002.,{2. Guizhou Univ Coll Sci Guiyang 550025 Peoples R China Chinese Acad Sci Shanghai Astron Observ Key Lab Res Galaxies & Cosmol Shanghai 200030 Peoples R China Guizhou Univ NAOC GZU Sponsored Ctr Astron Guiyang 550025 Peoples R China

BL Lac object S5 2.07+777 has been classified as a HYMOR(Hybrid Morphology radio source) for its hybrid FR I and FR II radio *** is one of four BL Lac objects with a kpc scale extended X-ray *** this paper,we searched the unpublished European VLBI Network(EVN) archived high resolution data for this source,and present the high resolution radio *** EVN images all show a core-jet structure in 1.6,5 and 8 *** combination with the VLA data in the literature,we found position angle differences(△PA) of about 10°-2.° between pc and kpc scale jet *** brightness temperature estimated from multi-band EVN images are around 1011.2.1011.8 K,from which the Doppler factor ranges from 3.2.to *** found significant flux variations of the radio core in 1.6 and 5 GHz,from which we derived the variability in brightness temperature Tvar to be 1013.6 K and 1014.0 K,corresponding to the Doppler factors of 9.3 and 12.4,respectively.

关键词： active galactic nuclei VLBI BL Lac objects

A numerical study of the wintertime double-warm-tongue structure in the Huanghai(Yellow) Sea

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Acta Oceanologica Sinica 2009年第4期28卷 8-15页

作者： SHAN Feng QIAO Fangli LU Xingang XIA Changshui College of Physical and Environmental Oceanography Ocean University of China Qingdao 266003 China First Institute of Oceanography State Oceanic Administration Qingdao 266061 China

Satellite remote sensing observations show that during winter, sea surface temperature （SST） presents the structure of double warm tongues in the Huanghai Sea trough： the western and the eastern warm tongues. Numerical experiments based on POM are carried out to study the forming mechanism of this thermal structure and its relation to the Huanghai Sea Warm Current （HSWC）. The control experiment reproduces this phenomenon quite well, and comparing experiments investigate the effect of wind and tide. It is found that the western warm tongue is mainly caused by the HSWC, which can be strengthened by wintertime southward wind. The eastern warm tongue develops under the influence of an anti-clockwise circulation which is induced by the temperature front of the Huanghai Sea Cold Water Mass （HSCWM） in summer and autumn. In the eastern portion of this circulation, the northward current carries warm water to the north, forming the eastern warm tongue, which remains till winter.

关键词： two-warm-tongue structure Huanghai Sea Warm Current Huanghai Sea Cold Water Mass POM

Fair Electronic Payment Scheme Based on DSA

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wuhan university Journal of Natural {2.s 2005年第1期10卷 203-206页

作者： WANGShao-bin HONGFan ZHUXian CollegeofComputerscienceandTechnology HuazhongUniversityofScienceandTechnologyWuhan430074HubeiChina

We present a multi-signature scheme based on DSA and describes a faireleetronic payment scheme based on improved DSA signatures. The scheme, makes both sides in e-qualpositions during the course of electronic transaction A Trusted Third Party (TTP)is involved in thescheme to guarantee the fairness of the scheme for both sides. However, only during the course ofregistration and dispute resolution will TTP be needed TTP is not needed during the normal paymentstage.

关键词： fair electronic payment multi-signatures DSA signatures E-commerce

AN EFFICIENT GENETIC ALGORITHM FOR LARGE SCALE BUILT-UP STRUCTURAL OPTIMIZATION

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Acta Mechanica Solida Sinica 1994年第1期7卷 29-38页

作者： Wang Shigang Yao Jianchu Huang Yuying Zhong Weifang Lin Jinming(Huazhong university of science and Technology {2.,Hubei,430074 P.R.china) Huazhong university of science and Technology {2. Hubei 430074 China

In this paper,a new zigzag method for plate structures and a genetic algorithm (GA) of dynamic source seed spaces are developed and a combination of them is used to deal with large scale built-up structural *** new GA combined with the zigzag method can work efficiently when coping with large scale structural optimization included displacement and stress *** show that this GA is robust and can be used for many complex structural optimization problems.

关键词： optimization zigzag method GAs

Preparation of Magnetic Chitosan Nanoparticles and Immobilization of Laccase

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Journal of wuhan university of Technology(Materials {2.) 2009年第1期24卷 42-47页

作者：方华黄俊 Key Laboratory of Fiber Optic Sensing Technology and Information Processing (Ministry of Education) Wuhan University of Technology

The magnetic chitosan nanoparticles were prepared by reversed-phase suspension method using Span-80 as an emulsifier, glutaraldehyde as cross-linking reagent. And the nanoparticles were characterized by TEM, FT-IR and hysteresis loop. The results show that the nanoparticles are spherical and almost superparamagnetic. The laccase was immobilized on nanoparticles by adsorption and subsequently by cross-linking with glutaraldehyde. The immobilization conditions and charac-terizations of the immobilized laccase were investigated. The optimal immobilization conditions were as follows： 10 mL of phosphate buffer （0.1 M, pH 7.0） containing 50 mg of magnetic chitosan nanoparticles, 1.0 mg·mL-1 of laccase and 1% （v/v） glutaraldehyde, immobilization temperature of 4 ℃ and immobilization time of 4 h. The immobilized laccase exhibited an appreciable catalytic capability （480 units·g-1 support） and had good storage stability and operation stability. The Km of immobilized and free laccase for ABTS were 140.6 and 31.1 μM in phosphate buffer （0.1 M, pH 3.0） at 37 ℃, respectively. The immobilized laccase is a good candidate for the research and development of biosensors based on laccase catalysis.

关键词： laccase magnetic chitosan nanoparticles immobilization enzyme activity stability

Simulated Annealing for Earliness/Tardiness Production Planning Model

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Systems science and Systems Engineering 2000年第1期10卷 93-98页

作者： LI Ying\|juan\+1,\ WANG Ding\|wei\+2.1. Department of Industry and Business Administration, Shenyang university Shenyang 110013,china 2. Department of Systems Engineering, College of Information {2. and Engineering,Northeastern university,Shenyan

To describe the earliness/tardiness production planning problems in the JIT environment, a nonlinear semi\|infinite programming model was proposed in \. Due to a nonconvex objective function and many infinite constraints, the model is difficult to be solved by traditional methods. In this paper, simulated annealing method combined with a heuristic is developed. Numerical results shows that the present approach is very efficient. Theoretically, the developed method is an attempt to solve a continuous domain problem by using simulated annealing.

关键词： earliness/tardiness schedule semi\|infinite programming heuristic simulated annealing