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New selenoproteins identified in silico from the genome of Anopheles gambiae

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science china(Life sciences) 2007年第2期50卷 251-257页

作者： JIANG Liang1,2,LIU Qiong1,CHEN Ping3,GAO ZhongHong3 & XU HuiBi3 1 college of Life science,Shenzhen University,Shenzhen 518060,china 2 Changchun Institute of Applied Chemistry,Chinese Academy of sciences,Changchun 130022,china 3 Department of Chemistry,Huazhong University of science and technology,Wuhan 430074,china college of Life science Shenzhen University Shenzhen 518060 China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China college of Life science Shenzhen University Shenzhen 518060 China Department of Chemistry Huazhong University of Science and Technology Wuhan 430074 China

Selenoprotein is biosynthesized by the incorporation of selenocysteine into proteins,where the TGA codon in the open reading frame does not act as a stop signal but is translated into *** dual functions of TGA result in mis-annotation or lack of selenoproteins in the sequenced genomes of many *** computational tools fail to correctly predict ***,we devel-oped a new method to identify selenoproteins from the genome of Anopheles gambiae *** on released genomic information,several programs were edited with PERL language to identify selenocysteine insertion sequence(SECIS)element,the coding potential of TGA codons,and cys-teine-containing homologs of selenoprotein *** results showed that 11365 genes were termi-nated with TGA codons,918 of which contained SECIS *** search revealed that 58 genes contained Sec/Cys pairs and similar flanking regions around in-frame TGA ***,7 genes were found to fully meet requirements for selenoproteins,although they have not been anno-tated as selenoproteins in NCBI *** from their basic properties,the newly found se-lenoproteins in the genome of Anopheles gambiae are possibly related to in vivo oxidation tolerance and protein regulation in order to interfere with anopheles' vectorial capacity of *** study may also provide theoretical bases for the prevention of malaria from anopheles transmission.

关键词： selenoprotein selenocysteine Anopheles gambiae genome bioinformatics

Isotope Method for confined Groundwater Recharge of the Lower Reaches of the Heihe River,Inner Mongolia,china

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Acta Geologica Sinica(English Edition) 2007年第4期81卷 668-673页

作者： CHEN Jiansheng ZHAO Xia FAN Zhechao and WANG Jiyang 1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,china 2 Institute of Isotope Hydrology Research,Hohai University,Nanjing 210098,china 3 Institute of Geology and Geophysics,Chinese Academy of science,Beijing 100018,china Hohai Univ Stae Key Lab Hydrol Water Resources & Hydraul E Nanjing 210098 Peoples R China Hohai Univ Inst Isotope Hydrol Res Nanjing 210098 Peoples R China Chinese Acad Sci Inst Geol & Geophys Beijing 100018 Peoples R China

Environmental isotopes have been appfied to analyze confined groundwater recharge in the lower reaches of the Heihe River, Inner Mongolia. CFC is regarded as a tracer that determines the date of groundwater, the date being less than 45 a. The confined groundwater within the Gurinai area and Ejin Basin other than the surface water of Heihe River might have originated from precipitation from Qilian Mountain or/and the Tibetan Plateau. The deep confined groundwater overflows into an upper aquifer and emerges into the ground, forming springs and lakes within the low-lying area. The recharge volume is estimated to be around 400 million-cubic meters.

关键词： isotope CFC Ejin Basin Gurinai groundwater recharge precipitation Qilian Mountain

Electronic Structure and Thermoelectric Properties of Ca_3co_4O_9

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Journal of Wuhan University of technology(Materials science) 2006年第1期21卷 13-15页

作者：闵新民 Department of Applied Chemistry Wuhan University of TechnologyWuhan 430070China

The relation among electronic structure, chemical bond and thermoelectric property of Ca3 co4 O9 was studied using density function and discrete variation method （DFT-DVM）. The gap between the highest valence band （HVB） and the lowest conduction band （LCB） shows a semiconducting property. Ca3 co4 O9 consists of coO2 and Ca2 coO3 two layers. The HVB and LCB near Fermi level are only mainly from O（ 2 ） 2p and co （2） 3d in Ca2 coO3 layer. Therefore, the semiconducting or thermoelectric property of Ca3 co4 O9 should be mainly from Ca2 coO3 layer, but it seems to have no direct relation to the coO2 layer, which is consistent with that binary oxides hardly have a thermoelectric property, but trinary oxide compounds have quite a good thermoelectric property. The covalent and ionic bonds of Ca2 coO3 layer are both weaker than those of coO2 layer. Ca plays the role of connections between coO2 and Ca2 coO3 layers in Ca3 co4 O9, decrease the ionic and covalent bond strength, and improve the thermoelectric property.

关键词： cobaltite electronic structure chemical bond thermoelectric property

A Regression Analysis Model Based on Wavelet Networks

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Systems science and Systems Engineering 2002年第1期11卷 123-128页

作者： XIONG Zheng-feng Department of Mathematics, Zhejiang University, hangzhou 310027, china Department of Mathematics Zhejiang University Hangzhou 310027 China

In this paper, an approach is proposed to combine wavelet networks and techniques of regression analysis. The resulting wavelet regression estimator is well suited for regression estimation of moderately large dimensi... 详细信息

关键词： frame wavelet networks regression estimator

Rotation-invariant Target Detection Using a Hybrid Optical Circular Harmonic Joint Transform correlator with DC Bias

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Chinese Journal of Lasers 1999年第1期8卷 50-55页

作者： HUANG Xiaojing (Department of Basic science, Fisheries college, Jimei University, Xiamen 361021, china)HUANG Xianlie (Department of Physics, Xiamen University, Xiamen 361005, china) 集美大学渔业学院福建厦门 361021 厦门大学物理系福建厦门

１ＩｎｔｒｏｄｕｃｔｉｏｎＦｏｒｒｏｔａｔｉｏｎｉｎｖａｒｉａｎｔｐａｔｅｒｎｒｅｃｏｇｎｉｔｉｏｎ，ｔｈｅｓｐａｔｉａｌｍａｔｃｈｅｄｃｏｒｅｌａｔｏｒｉｓｏｆｔｅｎｕｓｅｄｂｙｔａｋｉｎｇａｃｉｒｃｕｌａｒｈａｒ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＦｏｒｒｏｔａｔｉｏｎｉｎｖａｒｉａｎｔｐａｔｅｒｎｒｅｃｏｇｎｉｔｉｏｎ，ｔｈｅｓｐａｔｉａｌｍａｔｃｈｅｄｃｏｒｅｌａｔｏｒｉｓｏｆｔｅｎｕｓｅｄｂｙｔａｋｉｎｇａｃｉｒｃｕｌａｒｈａｒｍｏｎｉｃｃｏｍｐｏｎｅｎｔ（ＣＨ...

关键词： optical pattern recognition circular harmonic function joint transform correlator

SAR STEREO IMAGING ALGORITHM BASED ON CAPON SPECTRUM ESTIMATION

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Journal of Electronics(china) 2008年第6期25卷 817-821页

作者： Yang Xin Huang Shunii School of Electronic Engineering University of Electronic Science and Technology of China Chengdu 610054 China

This letter presents a novel approach for the Synthetic Aperture Radar (SAR) stereo imaging based on the Capon spectrum estimation technique. In order to deal with nonuniform sampling space and lead to super resolution in the elevation direction, Capon approach is used to focus the SAR data on a certain height. Results obtained on simulated data demonstrate the feasibility of the Capon based algorithm. compared with the classical Fast Fourier Transform (FFT), the Capon based algo-rithm shows better resolution quality.

关键词： Synthetic Aperture Radar (SAR) Stereo imaging Spectrum estimation Capon algorithm

Squeezing enhancement in the Jaynes-Cummings model via selective atomic measurements

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原子与分子物理学报 2000年第3期17卷 390-394页

作者： YE Liu (Department of Physics, Anhui University, Hefei 230039 Open Research Laboratory for Quantum communication and Quantum computation, University of science and technology of china, Hefei 230026) 安徽大学量子通信与量子计算开放实验室安徽合肥 230039

We study the model in which one of two entangled atoms interacts with a single mode cavity field based on the Jaynes Cummings model. Through measurement on the atom, the entanglement swapping can occur. It is proved... 详细信息

关键词： entangled state Jaynes Cummings model squeezing

Geophysical survey on the tectonic and sediment distribution of Qinghai Lake basin

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science china Earth sciences 2006年第8期49卷 851-861页

作者： AN Zhisheng1, WANG Ping2, SHEN Ji3, ZHANG Yixiang2, ZHANG Peizhen4, WANG Sumin3, LI Xiaoqiang1, SUN Qianli1, SONG Yougui1, AI Li1, ZHANG Yechun2, JIANG Shaoren2, LIU Xingqi3 & WANG Yong31. Institute of Earth Environment, Chinese Academy of sciences (CAS), Xi’an 710075, china 2. South china Sea Institute of Oceanology, CAS, Guangzhou 510301, china 3. Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, china 4. Institute of Geology, china Earthquake Administration, Beijing 100029, china Institute of Earth Environment Chinese Academy of Sciences (CAS) Xi’an China South china Sea Institute of Oceanology CAS Guangzhou China Nanjing Institute of Geography and Limnology CAS Nanjing China Institute of Geology China Earthquake Administration Beijing China

The intensive geophysical survey of Qinghai Lake reveals the buried depth of lake sediments and their distribution features. The result indicates that there are three important inter- phases of Qinghai Lake sediments: T1 is the rife interphase of the lake, above which sediments are spread all over the lake basin with roughly the same thickness; T5 is the interphase from which the neotectonic sedimentary cycle begins, and its above sedimentary environment is relatively stable; Tg is the base of the lake basin. Five west-northwest (WNW) fault belts defined the tectonic structure of Qinghai Lake basin: the central hunch around Haixin Shan with two subbasins both in its north and south. The thickness of the lake sediments varies at different places, the thickest sediments are found within the two subbasins. According to the depth that the Sparker System can reach, sediment in the northern subbasin is deeper than 560 m, while sediment in the southern subbasin is deeper than 700 m. The correlation between the seismic sequence stratigraph and the lithology of onshore core shows that Qinghai Lake sediments consist of muddy silt, clay silt, silty clay, gravel silty clay, etc.

关键词： sediment, geophysical survey, Qinghai Lake.

MATHEMATICAL MODEL FOR THE FLOW WITH SUBMERGED AND EMERGED RIGID VEGETATION

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Journal of Hydrodynamics 2009年第5期21卷 722-729页

作者： HUAI Wen-xin CHEN Zheng-bing HAN Jie ZHANG Li-xiang ZENG Yu-hong State Key Laboratory of Water Resources and Hydropower Engineering science Wuhan University Wuhan430072 China Department of Engineering Mechanics Kunming University of Science and Technology Kunming 650051 China

The article summarizes previous studies on the flow in open channels with rigid vegetation, and constructs a mathematical model for submerged and emerged rigid vegetation. The model involves the forces balance in the control volume in one-dimensional steady uniform flow. For submerged vegetation, the whole flow is divided into four regions： external region, upper vegetated region, transition region and viscous region. According to the Karrnan similarity theory, the article improves the mixing length expression, and then gives an analytical solution to predict the vertical distribution of stream-wise velocity in the external region. For emerged vegetation, the flow is divided into two region： outer region and viscous region. In the two circumstances, the thicknesses of each region are determined respectively. The comparison between the calculated results and our experimental data and other researchers＇ data proves that the proposed model is effective.

关键词： Karman similarity theory mixing length submerged and emerged rigid vegetation velocity distribution