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ICDAR 2003 robust reading competitions: Entries, results, and future directions

International Journal on Document Analysis and Recognition 2005年第2-3期7卷 105-122页

作者： Lucas, Simon M. Panaretos, Alex Sosa, Luis Tang, Anthony Wong, Shirley Young, Robert Ashida, Kazuki Nagai, Hiroki Okamoto, Masayuki Yamamoto, Hiroaki Miyao, Hidetoshi Zhu, JunMin Ou, wuwen Wolf, Christian Jolion, Jean-Michel Todoran, Leon Worring, Marcel Lin, Xiaofan Department of Computer Science University of Essex Colchester CO4 3SQ United Kingdom Department of Information Engineering Faculty of Engineering Shinshu University Nagano 380-8553 4-17-1 Wakasato Japan Institute of Automation Chinese Academy of Science Beijing 100080 PO Box 2738 China Lyon Research Center for Images and Intelligent Information Systems INSA de Lyon 69621 Villeurbanne Cedex Bt. J. Verne 20 rue Albert Einstein France Informatics Institute University of Amsterdam 1098 SJ Amsterdam Kruislaan 403 Netherlands Hewlett-Packard Laboratories Palo Alto CA 94304 1501 Page Mill Road United States

This paper describes the robust reading competitions for ICDAR 2003. With the rapid growth in research over the last few years on recognizing text in natural scenes, there is an urgent need to establish some common benchmark datasets and gain a clear understanding of the current state of the art. We use the term 'robust reading' to refer to text images that are beyond the capabilities of current commercial OCR packages. We chose to break down the robust reading problem into three subproblems and run competitions for each stage, and also a competition for the best overall system. The subproblems we chose were text locating, character recognition and word recognition. By breaking down the problem in this way, we hoped to gain a better understanding of the state of the art in each of the subproblems. Furthermore, our methodology involved storing detailed results of applying each algorithm to each image in the datasets, allowing researchers to study in depth the strengths and weaknesses of each algorithm. The text-locating contest was the only one to have any entries. We give a brief description of each entry and present the results of this contest, showing cases where the leading entries succeed and fail. We also describe an algorithm for combining the outputs of the individual text locators and show how the combination scheme improves on any of the individual systems. © Springer-Verlag 2005.

关键词： Camera captured Reading competition Text locating

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两个30年气候平均值的差异及其对气候业务的影响

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气象科技 2005年第2期33卷 124-127页

作者：雷向杰黄祖英田武文胡春娟南京信息工程大学南京210044 陕西省气象局气象台西安710015

对陕西短期气候预测业务使用的39个气象站气候要素1971～2000年平均值与1961～1990年平均值进行比较,发现大部分地区年平均气温升高,晴天日数增加;年降水量、阴天日数、降水日数、年日照时数减少;年大风日数、沙尘暴日数、冰雹日数、雷... 详细信息

对陕西短期气候预测业务使用的39个气象站气候要素1971～2000年平均值与1961～1990年平均值进行比较,发现大部分地区年平均气温升高,晴天日数增加;年降水量、阴天日数、降水日数、年日照时数减少;年大风日数、沙尘暴日数、冰雹日数、雷暴日数减少等。把两个平均值放在长序列中分析,发现某些气象要素最近的气候平均值的差值在20世纪80～90年代期间的5～6个气候平均值每两个相邻平均值的差值中是最大的,说明陕西20世纪90年代气候较60年代干燥、温暖,且90年代气温高、降水少的特点十分突出。还对某些要素平均值改变对气候影响评价、气候预测业务产生的影响进行简要分析。

关键词：平均值气候业务 20世纪90年代短期气候预测气候影响评价 1990年 2000年气候要素气温升高部分地区年降水量降水日数日照时数大风日数雷暴日数气象要素 60年代气象站年平均沙尘暴陕西差值冰雹

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A Convenient and Practical Prepapation of Acetylphenyl Boronic Acids

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Chemical Research in Chinese Universities 2004年第6期20卷 734-737页

作者： CHAOJian-ping WANGWei wuwen-qun LUOXuan-de LINGYang-zhi SchoolofPharmaceuticalScience PekingUniversityBeijing100083P.R.China NationalInstitutesofPharmaceuticalResearchandDevelopment Beijing100226P.R.China

A practical and scalable synthesis route of acetylphenylboronic acids is described. Bromoacetophenones(compounds 3a, 3b) were ketalized with ethylene glycol and triethyl orthoformate to give bromo ketals(compounds 4a_4c) in 60_80% yields. Compounds 4a_4b were treated with a Grignard reagent and then exchanged with borate to give p- and m-acetylphenyl boronic acids(compounds 5a and 5b) in 80% and 56% yields, respectively. The o-form(compound 5c) was obtained in 61% yield via the BuLi method.

关键词： p- m- o-Acetylphenylboronic acid Grignard reaction Mg- and Li-halogen exchange

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Prolonged Small Bowel Allografts Survival by CTLA4Ig Gene Transfection in Rats

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Journal of Nanjing Medical University 2004年第4期18卷 187-191页

作者： WANGYi-fang LAIFu-sheng XUAi-gang wuwen-xi DepartmentofGastrointestinalSurgery theFirstAffiliatedHospitalofNanjingMedicalUniversityNanjing210029P.R.China

Objective: To evaluate the local expression of CTLA4Ig gene in small intestines and its effect on prolonging survival time of the small bowel allografts. Methods: The donor small bowels were perfused ex vivo with CTLA4Ig cDNA reconstructed plasmid packaged with lipofectin vector via intra-superior mesenteric artery before transplantation. The CTLA4Ig transgene expression in the small bowel allografts was assessed by immunohistology and RT-PCR after transplantation. Results: Immunohistology and RT-PCR demonstrated expression of CTLA4Ig transgene in the allografts at least for 28 d after transplantation. Eleven cases of the 18 small bowel allografts that received CTLA4Ig gene transfection survived more than 90 d in the recipients. Conclusion: A single ex vivo intra-superior mesenteric artery infusion of CTLA4Ig cDNA reconstructed plasmid packaged with lipofectin induced efficient transduction of the small intestine, and the transfected small bowel allografts could survivor longer in nonimmunosupression rats.

关键词： small bowel allograft CTLA4Ig gene therapy lipofectin

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Changes of Nitric Oxide Synthase Activity in Penumbral and Core Area during Focal Cerebral Ischemia and Reperfusion in Rats

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Journal of Nanjing Medical University 2004年第4期18卷 183-186页

作者： GUZhen ZHOUJian-ping wuwen-zhong ZHANGYong-jie HANQun-ying WANGHe-ming DepartmentofAnatomy NanjingMedicalUniversityNanjing210029 DepartmentofAcupuncture JiangsuTraditionalMedicalHospitalNanjing210029P.R.China

Objective:To study the changes of nitric oxide synthase(NOS)activity in penumbral and core area during focal cerebral ischemia and reperfusion,and to explore the therapeutic window of focal cerebral ischemia. Methods:The middle cerebral artery of rats was occluded for 15,30,60,90 and 120 min by an intraluminal filament respectively,and recirculation was instituted for 24 *** changes of NOS activity in ischemic core area(parietal cortex and caudoputamen)and penumbral area (frontal cortex)were examined after focal cerebral ischemia and reperfusion using NADPH-d histochemistry ***:The NOS activity of the ischemic penumbral area peaked at 60 min while the ischemic core area peaked at 30 min then declined at 90-120 min ***:NOS takes part in cerebral ischemic damage during focal cerebral ischemia and *** NOS activity of the ischemic penumbral area is different from the ischemic core *** peak time of the penumbral area is delayed comparing with the core *** data suggest that the best time to apply NOS inhibitor is within 30 min in ischemic core area, and 60 min in penumbral area.

关键词： focal cerebral ischemia reperfusion brain penumbral area core area nitric oxide synthase

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Study on the Macro-residual Stress of 304 Stainless Steel Coated with TiO2-SiO2 Thin Films by Sol-gel Process

Study on the Macro-residual Stress of 304 Stainless Steel Co...

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The 3～〔rd〕International Conference on High-Performance Ceramics(CICC-3)（1）

作者： Yu Xingang, Zuo Yanbin, Ma Hongwen, Zhao Huifeng, Luo wuwen, Bi Wenrue and Wang Li Key Laboratory of Nonferrous Materials and New Processing Technology (Guangxi Uniwersity, Guilin Institute of Technology) Ministry of Education, Guilin, China Department of Material Science, China University of Geosciences Beijing, China Research Institute of Glass and Glass Fiber, China Building Material Academy Beijing,China

X-ray diffraction (XRD) method to measure the residual stress in the metal substrate surface layer and the medial oxide layer between thin film and metal substrate was introduced and the sol-gel TiO2-SiO2 thin film was successfully prepared on SUS304 stainless steel substrate by dip-coating process. The macro residual stress existing in metal substrate was analyzed by XRD. It turns out that the com-pressive stress existing in the metal substrate surface layer decreases with the raising of heat-treated temperature and that the compressive stress of metal substrate surface layer and the tensile stress of the medial oxide layer increase with the increase of the withdrawal speeds of the sol-gel dip-coating. Based on the above study, colored stainless steels of high quality were prepared by sol-gel process for the first time.

关键词： TiO2-SiO2 thin film, Macro residual stress, Coloured stainless steel, Sol-gel

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Identification of Taxus cuspidata Sieb. et Zucc. endophytic fungi-new species, species known and their metabolite

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Journal of Forestry Research 2003年第4期14卷 290-294页

作者： XlANGYong LUAn-guo wuwen-fang ShenyangPharmaceuticalUniversity Shenyang110016P.R.China InstituteofAppliedEcology ChineseAcademyofSciencesShenyang110016P.R.China

A total of 94 isolates of endophytic fungi were isolated from the bark of 200-yr.-old Taxus cuspidata Sieb. et *** the primeval forest of the Changbai Mountain Natural Reserve, and 19 species of endophytic fungi were identified, including 10 new recorded-genus-species, 2 new species (Phomopsis Iongiscoleosporu Y. Xiang et Lu An Guo Wu Wen Fang, Coniothyrium macrospoum Y. Xiang J.X. et Lu An Guo Wu Wen Fang), 1 new varied species (Alternaria alternata (Fr.) Keissler var. taxi *** et Lu An Guo) and 6 known species of China (Eurotium amstelodomi Mgngin, Eurotium repens de Bary, Botrytis sp.,Penicillium citrinum Thom, Epicoccum nigrium LinK, Fusarium sp.). Through thin layer chromatography (TLC), liquid fermentation metabolite of the strains was determined, and four strains (Alternaria alternata (Fr.) Keissler var. taxi Y. Xiang et Lu An Guo Wu Wen Fang, Botrytis sp., Eurotium amsteloodomi Mgngin, Eurotium repens de Bary) were screened out, whose metabolites reacted positively with the vanillic aldehyde that was one special taxoid developer. Among the four strains, Alternaria alternata (Fr.) Keissler var. taxi Y. Xiang et Lu An Guo, produced one compound largely, which positively reacted with one alkaloids developer-Bismuth potassium iodide. The compound is identified as taxoids type through spectrum analysis. This demonstrates that Alternaria alternata (Fr.) Keissler var. taxiY. Xiang et Lu An Guo can highly produce taxoids largely.

关键词：真菌树皮紫杉长白山自然保护区原始森林种分离鉴定变异发酵代谢物菌株

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Molecular Cloning and Expression of Porcine IFNγ cDNA

Molecular Cloning and Expression of Porcine IFNγ cDNA

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2003北京国际养猪研讨会暨展览会

作者： wuwen-Xue XiaChun WangMing JiangJin-Shu Collegeof Veterinary Medicine China Agricultural University Beijing 100094

Introduction and Objectives Porcine interferon gamma(PoIFNγ) is an important cytokine with antiviral activity andimmunomodu-latory effects such as enhancing cytotoxiciry mediated by T lymphocytes, promotingdifferentiat-ion of B lymphocytes and expression of MHC·and MHC·,and activatingmacrophage. We report here the cloning and expression of PoIFNγin *** and Pichia pastoris.

关键词： Molecular Cloning and Expression of Porcine IFN

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Domain decomposition methods for the solutions of partial differential equations

Domain decomposition methods for the solutions of partial di...

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作者： Guo, wuwen York University (Canada)

学位级别：Ph.D.

Lions' non-overlapping domain decomposition method is analyzed and explained using an optimization approach for the typical linear model −Δ u = f· in Ω with the boundary condition u = on ∂Ω. An optimization-based domain decomposition method for the solution of partial differential equations is proposed as a variant of Lions' domain decomposition method. The crux of the method is to solve a minimization problem for which the objective functional measures the interface bias. Lions' domain decomposition method and the proposed domain decomposition iterative procedure are generalized to solve a controlled linear partial differential equation and to solve a class of nonlinear partial differential equations. Convergence of iterations and finite approximations are studied for various settings. Numerical results are presented and show that the proposed domain decomposition iterative procedure generally converges faster than Lions' domain decomposition method.

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Microstructure manipulations to attain densification without distortion during liquid phase sintering

Microstructure manipulations to attain densification without...

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作者： Yi, wuwen The Pennsylvania State University

学位级别：Ph.D.

Liquid phase sintering provides a means for net-shape manufacturing, but there is a common concern about shape distortion during densification. In the present work, a theory is created to achieve densification without distortion by manipulating microstructure and its evolution during sintering. The microstructure parameters considered in this study are solid volume fraction, dihedral angle, green porosity, and green pore size. These parameters were varied to measure densification and distortion behavior during liquid phase sintering using W-Ni-Cu alloys. Green compacts were formed using ethylene-bis-stearamide as a pore-forming agent with the amount of polymer controlling the initial porosity. Different initial pore sizes were generated by varying the polymer particle size. Dihedral angle was varied by changing the Ni:Cu ratio in the alloys. Finally, the solid volume fraction was adjusted via the tungsten content. Dilatometry was employed to measure shrinkage and shrinkage rate during heating. Distortion was quantified using final compact profiles determined with a coordinate measuring machine to calculate a distortion parameter. Sintering results showed that solid volume fraction and dihedral angle are dominant factors on densification and distortion during liquid phase sintering. Distortion decreased with increasing solid volume fraction and dihedral angle, both contributing to a higher solid contiguity. Densification decreased with increasing green porosity and pore size, while initial pore structure did not show observable effects on distortion in situations of fast densification where full density is achieved. Real time video imaging and quenching results verified that densification and distortion are sequential events in liquid phase sintering with densification occurring first. In gravity, distortion is inhibited until pores are closed and the compact is nearly fully densified. Based on the experimental results, some processing strategies emerge that achieve

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