检索结果-南通市图书馆

Restoration method of characters on Jiagu rubbings based on Poisson distribution and fractal geometry

Science c.ina(Information sciences) 2010年第7期53卷 1296-1304页

作者： GU ShaoTong1,2,3, FENG GeFei1,2,3, MA XiaoHu1,2,4 & YANG YiMing1,2,3 1Institute of linguistics, xuzhou normal university, xuzhou 221009, c.ina 2jiangsu college key lab of linguistic sciences and neuro-cognition engineering, xuzhou normal university, xuzhou 221009, c.ina 3linguistic Science college, xuzhou normal university, xuzhou 221009, c.ina 4School of computer Science and Technology, Soochow university, Suzhou 215006, c.ina 1. Institute of linguistics Xuzhou Normal University Xuzhou 221009 China2. Jiangsu College Key Lab of Linguistic Sciences and Neuro-cognition Engineering Xuzhou Normal University Xuzhou 221009 China3. Linguistic Science College Xuzhou Normal University Xuzhou 221009 China4. School of Computer Science and Technology Soochow University Suzhou 215006 China

A scheme for character restoration of Jiagu rubbings based on Poisson distribution and fractal geometry is proposed in this paper. The distribution characteristics of the connected regions on Jiagu rubbings is analyzed, and all the connected regions are recognized according to differences between these and their mathematical expectations. Regions are recognized as noise regions and filled if the differences are negative, while stroke regions are reserved. The attributes of the character image edges on Jiagu rubbings are also analyzed. The fractal dimensions of the character edge of Jiagu rubbings are calculated by means of statistics. The feature points are obtained using the cosine of the angle between the two vectors of the point and the consecutive two points. Different compression transformations with weighted coordinates are performed on different strokes and segments of the characters so as to smoothen the character edge of Jiagu rubbings images. Experimental results show that our scheme could successfully clear noise regions and polish the character edge of Jiagu rubbings.

关键词： Jiagu rubbings Poisson distribution fractal geometry fractal dimension compression transformation character restoration

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

PRGL:A cell wall proline-rich protein containning GASA domain in Gerbera hybrida

引用

Science c.ina(Life sciences) 2008年第6期51卷 520-525页

作者： PENG JianZong, LAI LiuJing & WANG XiaoJing college of Life sciences, South c.ina normal university, Guangdong Provincial key lab of Biotechnology for Plant Development, Guangzhou 510631, c.ina 1. college of Life sciences South China Normal University Guangdong Provincial Key Lab of Biotechnology for Plant Development Guangzhou 510631 China

PRPs (proline-rich proteins) are a group of cell wall proteins characterized by their proline and hy- droproline-rich repetitive peptides. The expression of PRPs in plants is stimulated by wounding and environmental stress. GASA (gibberellic acid stimulated in Arabidopsis) proteins are small peptides sharing a 60 amino acid conserved c-terminal domain containing twelve invariant cysteine residues. Most of GASAs reported are localized to apoplasm or cell wall and their expression was regulated by gibberellins (GAs). It has been reported that, in French bean, these two proteins encoding by two distinct genes formed a two-component chitin-receptor involved in plant-pathogen interactions when plant was infected. We cloned a full-length cDNA of PRGL (proline-rich GASA-like) gene which encodes a protein containing both PRP and GASA-like domains. It is demonstrated that PRGL is a new protein with characteristics of PRP and GASA by analyzing its protein structure and gene expression.

关键词： cell wall protein proline-rich proteins (PRPs) gibberellic acid stimulated in Arabidopsis (GASA) proline-rich GASA-like (PRGL) Gerbera hybrida

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Purification and characterization of a novel cholesterol-lowering protein from the seeds of Senna obtusifolia

引用

Science c.ina(Life sciences) 2008年第11期51卷 1020-1024页

作者： LI chuHua1, LI Mei2, cHANG WenRui2 & GUO BaoJiang1 1 college of Life sciences, South c.ina normal university, Guangdong Provincial key lab of Biotechnology of Plant Development, Guang-zhou 510631, c.ina 2 Institute of Biophysics, chinese Academy of sciences, Beijing 100101, c.ina 1. college of Life sciences South China Normal University Guangdong Provincial Key Lab of Biotechnology of Plant Development Guangzhou 510631 China 2. Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China

"Juemingzi", a source of traditional chinese herbal medicine, has been demonstrated to play a role in decreasing serum cholesterol concentration. In this study, a novel protein, which has shown an in-hibitory effect on cholesterol biosynthesis, was isolated from Senna obtusifolia L. seed by gel filtration and ion exchange chromatography. The novel protein’s molecular mass was 19.7 kD and its pI was 4.80. Both SDS-PAGE and isoelectric-focusing (IEF) revealed a single coomassie brilliant blue stained band, indicating that the novel protein was a single peptide. The N-terminal amino acid sequence of the pro-tein was IPYISASFPLNIEFLPSE, which had no similarity with any other protein sequences in the NcBI protein database. circular dichroism (cD) signals indicated that S. obtusifolia seed protein contained 12.5% α-helix, 55.6% β-sheet, and 31.9% random coil.

关键词： Senna obtusifolia L. seed novel protein purification biochemical properties cholesterol biosynthesis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preparation and electrochemical properties of urchin-like α-Fe_2O_3 nanomaterials

引用

Science c.ina(Technological sciences) 2010年第7期53卷 1897-1903页

作者： TONG GuoXiu1,2, GUAN JianGuo2, WU WenHua1, LI Liangchao1, GUAN Yao2 & HUA Qiao1 1 college of chemistry and Life sciences, Zhejiang normal university, Jinhua 321004, c.ina 2 State key laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan university of Technology, Wuhan 430070, c.ina 1. college of chemistry and Life sciences Zhejiang Normal University Jinhua 321004 China2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Based on a facile glucose-guided hydrolyzing-heat-treating approach, urchin-like α-Fe2O3 nanomaterials with controllable morphology and crystallinity were prepared via adjusting the heat-treating temperature, and their electrochemical performances were investigated. The results showed that changing the heat-treating temperature can effectively control the structure and electrochemical property of the as-made products. The urchin-like α-Fe2O3 nanomaterials obtained by heat-treating at 300°c, composed of a mass of the shuttle fibrous brunches, had higher initial discharge capacity(1475 mAhg-1) than those consisting of nanorods formed at 700°c. The above difference is ascribed to the urchin-like samples obtained at the relatively low heat-treating temperature, which, with low crystallinity, large SBET, and well-regulated porous, is helpful to the adsorption of electrolyte and the transport of lithium ion, resulting in the high activity and discharge-charge capacity.

关键词： urchin-like nanomaterials hematite electrochemical performance glucose-guided hydrolyzing-heat-treating approach

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research on the damage of the Great Wall of Ming Dynasty in Beijing by remote sensing

引用

Science c.ina(Technological sciences) 2008年第S1期51卷 195-202页

作者： LI XiaoJuan,GONG HuiLi,ZHANG Ou,ZHANG WeiGuang & SUN YongHua The key lab of 3D Information Acquisition and Application,MOE,the key lab of Beijing Resource Envi-ronment and GIS,and college of Resource Environment & Tourism,capital normal university,Beijing 100037,c.ina capital normal Univ Key Lab Informat Acquisit & Applicat MOE Key Lab Beijing Resource Environm Beijing 100037 Peoples R China

Using aerial photos and high resolution satellite images of the year of 2004,this paper establishes remote sensing interpretation marks of the Great Wall of Ming Dynasty's damaged levels. Based on field survey and remote sensing survey in 1984,we analyzed present situation and changing characteristics being of the Great Wall of Ming Dynasty in Beijing. The results show that about 7.02% of the wall is well-preserved (about 25861 m); 31.5% of the wall is slightly or moderately dam-aged (about 115989 m); 61.5% of the wall is badly damaged (about 226379 m). This paper analyzes the dynamic change of the Great Wall of Ming Dynasty. It shows that the damaged situation of the Great Wall of Ming Dynasty in Beijing is serious. From 1984 to 2004,the well-preserved wall is decreased by 33206 m (decreased by 56%); badly damaged wall increased by 51207 m (increased by 67%). Finally,this paper analyzes the influence factors of damaging Great Wall. The conclusion is as follows: The damaged Great Wall is generally near the roads and villages,small slope,and easily arriving land.

关键词： the Great Wall of Ming Dynasty remote sensing interpreting damage dynamic change spatial analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Phytoremediation of Rocky Slope Surfaces: Selection and Growth of Pioneer climbing Plants

引用

Pedosphere 2009年第4期19卷 541-544页

作者： WANG Zhong-Qiang WU Liang-Huan S. ANIMESH ZHU Yuan-Hong Ministry of Education key lab of Environmental Remediation and Ecosystem Health College of Environmental and Resource Sciences Zhejiang University Hangzhou 310029 （China） college of Urban and Environmental sciences Northeast Normal University Changchun 130024 （China） Zhejiang Provincial key laboratory of Subtropical Soil and Plant Nutrition College of Environmental and Resource Sciences Zhejiang University Hangzhou 310029 （China） Department of crop and Soil sciences The Pennsylvania State University University Park PA 16802 （USA）

INTRODUcTION As a result of the massive construction following rapid economic growth in c.ina, extraction of building materials from mountain resources has left behind many quarries. Those quarries usually have rocky surfaces and steep slopes. The existence of rocky slopes is not only a safety hazard but also increases soil erosion and affects landscape aesthetics. Natural restoration of vegetation on rocky slope surfaces is a very slow process, which might require hundreds of years, and is not considered an acceptable restoration strategy （cullen et al., 1998）. Phytoremediation methods have been widely considered as a better option for vegetation establishment on rocky slope surfaces （Muzzi et al., 1997）.

关键词： relative growth rate survival rate vegetation restoration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Wg signaling in Drosophila heart development as a pioneering model

引用

Journal of Genetics and Genomics 2010年第9期37卷 593-603页

作者： Xiushan Wu The center for Heart Development, key lab of MOE for Developmental Biology and Protein chemistry, college of Life sciences, Hunan normal university, changsha, 410081, c.ina [a] The center for Heart Development Key Lab of MOE for Developmental Biology and Protein Chemistry College of Life Sciences Hunan Normal University Changsha 410081 China

The heart is one of the first functional embryonic organs occurring during development. The fundamental developmental processes and genes involved in cardiogenesis are conserved between the invertebrates and vertebrates. In the past fifteen years, one of signaling pathways that has been best characterized in heart development in both invertebrates and vertebrates is the Wg/Wnt signaling pathways. Since our discovery of the Wg signaling required for the early heart development in Drosophila, the past fifteen years have witnessed tremendous progress in the understanding of specific Wnt signaling pathways in vertebrate cardiogenesis. This review will summarize the current state of knowledge of Wg signaling transduction in Drosophila heart development, which will benefit our understanding of vertebrate cardiogenesis and human congenital malformations.

关键词： heart development Wg/Wnt signaling pioneering model congenital malformations

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A New Process and Framework for Direct Anonymous Attestation Based on Symmetric Bilinear Maps

引用

Wuhan university Journal of Natural sciences 2011年第5期16卷 369-375页

作者： TAN Liang1,2, ZHOU Mingtian3 1. college of computer/key lab of Visualization in Scientific computing and Virtual Reality of Sichuan, Sichuan normal university, chengdu 610066, Sichuan, c.ina 2. Institute of computing Technology, chinese Academy of sciences, Beijing 100190, c.ina 3. School of computer Science and engineering, university of Electronic Science and Technology of c.ina, chengdu 610054, Sichuan, c.ina college of computer/key lab of Visualization in Scientific computing and Virtual Reality of Sichuan Sichuan Normal University Chengdu Sichuan China Institute of computing Technology Chinese Academy of Sciences Beijing China School of computer Science and engineering University of Electronic Science and Technology of China Chengdu Sichuan China

For the problem of the original direct anonymous attestation （DAA） scheme＇s complexity and great time consumption, a new DAA scheme based on symmetric bilinear pairings is presented, which gives a practical solution to Ecc-based TPM in protecting the privacy of the TPM. The scheme still includes five procedures or algorithms： Setup, Join, Sign, Verify and Rogue tagging, but gets rid of zero-knowledge proof and takes on a new process and framework, of which the main operations are addition, scalar multiplication and bilinear maps on supersingular elliptic curve systems. Moreover, the scheme adequately utilizes the properties of bilinear maps as well as the signature and verification of the ecliptic curve system itself. compared with other schemes, the new DAA scheme not only satis- fies the same properties, and shows better simplicity and high effi- ciency. This paper gives not only a detailed security proof of the proposed scheme, but also a careful performance analysis by comparing with the existing DAA schemes.

关键词： direct anonymous attestation bilinear map privacy authentication trusted computing platform trusted platform module

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Using remote sensing to research Beijing wetlands dynamics

引用

Science c.ina(Technological sciences) 2006年第z2期49卷 97-107页

作者： ZHAO Wenji, GONG Zhaoning, GONG Huili, LI Xiaojuan, ZHANG Songmei & LI Jing key lab of Resource Environment and GIS of Beijing, capital normal university, Beijing 100037, c.ina Northeast Institute of Geography and Agroecology, chinese Academy of sciences, changchun 130012, c.ina college of Resources Science and Technology, Beijing normal university, Beijing 100875, c.ina capital normal Univ Key Lab Resource Environm Beijing 100037 Peoples R China capital normal Univ GIS Beijing Beijing 100037 Peoples R China chinese Acad Sci NE Inst Geog & Agroecol Changchun 130012 Peoples R China Beijing normal Univ Coll Resources Sci & Technol Beijing 100875 Peoples R China

In Beijing, where wetlands are important to municipal freshwater conservation and biodiversity retention, three different types of wetlands were identified: riverside wetlands, wetlands surrounding lakes and reservoirs, and wetlands in municipal *** sensing technology was applied in combination with field investigations to monitor and analyze the changes in these wetlands, and a combination of fusion technologies,Landsat TM/ETM+ and IKONOS imaging, was used to investigate and map them. This study indicates that not only have wetland areas been reduced by half, but also their ecological environments have been degraded because of rapid economic development and population increase. Suggestions based on this research are made to reconstruct the ecological environment of the wetlands and return them to their previous state.

关键词： Beijing, wetland resource, remote sensing technology, ecological environment, dynamics.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

First report of Protokeelia spinifera and Rhopalodia iriomotensis from c.ina,with comments on their systematic positions

引用

Journal of Systematics and Evolution 2009年第2期47卷 173-178页

作者： 1,2Yang LI 2Ya-Hui GAO 1,3Song-Hui LU 1(college of Life sciences,South c.ina normal university,Guangdong Provincial key lab of Biotechnology for Plant Development,Guangzhou 510631,c.ina) 2(key laboratory for Subtropical Wetland Ecosystem Research,Ministry of Education,School of Life sciences,Xiamen university,Xiamen 361005,c.ina) 3(Institute of Harmful Algae and Aquatic Environment,Jinan university,Guangzhou 510632,c.ina) ( Institute of Harmful Algae and Aquatic Environment Jinan University Guangzhou 510632 China )

Protokeelia is described as a new and rare pennate diatom genus in *** valve includes two parts:ventral valve and dorsal *** ventral valve is more or less convex or *** raphe runs in a distinct elevated and thickened siliceous *** the internal valve,beneath the raphe are fibulae or fibulae clusters which connect the ventral and dorsal *** species,*** Round & Basson,is observed in the water samples from a mangrove forest in Sai Kung,Hong Kong,*** main morphological features are described in this paper along with electron microscope(EM) *** comparisons are also made among several allied *** addition,a newly recorded species for c.ina,Rhopalodia iriomotensis Kobayasi,Nagumo & Tanaka,is discussed *** several key features observed in this species resemble those of some Pro-tokeelia species,we suggest that it may actually represent a Protokeelia species.

关键词： c.ina new genus record Protokeelia Rhopalodia iriomotensis

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：