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Multistage evolution of continental collision orogen:A case study for western Dabie orogen

Chinese Science Bulletin 2009年第15期54卷 2568-2579页

作者： WU YuanBao State key laboratory of Geological Processes and Mineral Resources, Faculty of Earth Sciences, china University of Geosciences, Wuhan 430074, china State key laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, china State key laboratory of Geological Processes and Mineral Resources Faculty of Earth Sciences China University of Geosciences Wuhan 430074 China State key laboratory of Continental Dynamics Department of Geology Northwest University Xi’an 710069 China

The foramtion and evolution of collisional orogen is a prominent feature along convergent plate margins, and is generally a complex process. This article presents an integrated study of zircon genesis, U-Pb age and Lu-Hf isotope composition as well as geological characteristics for the western Dabie orogen to constrain its multi-stage evolution history. The results suggest that the formation of oceanic crust in the Huwan area was constrained at ca. 400―430 Ma, which was slightly later than the collision of the northern Qinling with the North china Block. It formed in a marginal basin in the northern margin of the Yangtze Block. The peak metamorphism of eclogite in the Huwan area occurred at ca. 310 Ma, and the timing of the initial exhumation of oceanic eclogite was about 270 Ma. The high to ultrahigh pressure (HP-UHP) metamorphic rocks in the Xinxian and the Hong'an metamorphic zones have the same ages and natures as those of the HP-UHP metamorphic rocks in the other Dabie-Sulu terrains, and also have experienced multi-stage exhumation, and thus can be taken as a coherent part of the Dabie-Sulu orogen. Therefore, the Qinling-Dabie-Sulu orogen is a typical multi-stage continental collision orogen, with an amalgamation process extending more than 200 Ma.

关键词：大别造山带大陆碰撞西部演变超高压变质岩碰撞造山带苏鲁造山带变质岩区

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On the number of rotation symmetric Boolean functions

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Science china(Information Sciences) 2010年第3期53卷 537-545页

作者： FU ShaoJing1, LI Chao1,2 & QU LongJiang1,3 1Science College of National University of Defense Technology, Changsha 410073, china 2State key laboratory of Information Security, Beijing 100039, china 3National Mobile Communications Research laboratory, Southeast University, Nanjing 210096, china 1. Science College of National University of Defense Technology Changsha 410073 China2. State Key Laboratory of Information Security Beijing 100039 China3. National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China

Rotation symmetric Boolean functions (RSBFs) have been used as components of different cryptosystems. This class of functions are invariant under circular translation of indices. In this paper, we investigated balanced RSBFs and 1st order correlation immune RSBFs. Based on constructive techniques, we give an accurate enumeration formula for n-variable balanced RSBFs when n is a power of a prime. Furthermore, an original and efficient method to enumerate all n-variable (n prime) 1st order correlationimmune functions is presented. The exact number of 1st order correlation immune RSBFs with 11 variables is 6925047156550478825225250374129764511077684773805520800 and the number of 13 variables has 189 digits. Then for more variables, we also provide a significant lower bound on the number of 1st order correlation immune RSBFs.

关键词： cryptography rotation symmetry correlation immunity balancedness

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Generation of fad2 transgenic mice that produce omega-6 fatty acids

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Science china(Life Sciences) 2009年第11期52卷 1048-1054页

作者： CHEN Qing1, LIU Qing2, WU ZhiFang1, WANG ZongYi3 & GOU KeMian1 1 State key laboratory for Agrobiotechnology, china Agricultural University, Beijing 100193, china 2 Blackmountain laboratory, CSIRO Plant Industry, Canberra, Australia 3 College of Animal Science and Technology, china Agricultural University, Beijing 100193, china 1. State key laboratory for Agrobiotechnology China Agricultural University Beijing 100193 China 2. Blackmountain laboratory CSIRO Plant Industry Canberra Australia 3. College of Animal Science and Technology China Agricultural University Beijing 100193 China

Fatty acid desaturase-2 (FAD2) introduces a double bond in position 12 in oleic acid (18:1) to form linoleic acid (18:2 n-6) in higher plants and microbes. A new transgenic expression cassette, containing CMV promoter/fad2 cDNA/SV40 polyA, was constructedto produce transgenic mice. Among 63 healthy offspring, 10 founders (15.9%) integrated the cotton fad2 transgene into their genomes, as demonstrated by PCR and Southern blotting analysis. All founder mice were fertile and heterozygous fad2 female and nontransgenic littermates were used for fatty acid analysis using gas chromatography. One fad2 transgenic line showed substantial differences in the fatty acid profiles and the level of linoleic acid was increased 19% (P<0.05) in transgenic muscles compared to their nontransgenic littermates. Moreover, it exhibited an 87% and a 9% increase (P<0.05) in arachidonic acid (20:4 n-6) in muscles and liver, compared to their nontransgenic littermates. The results indicate that the plant fad2 gene can be functionally expressed in transgenic mice and may playan active role in conversion of oleic acid into linoleic acid.

关键词： fatty acid desaturase FAD2 transgenic mouse oleic acid linoleic acid arachidonic acid

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Isomerization of B_6,B_6^- and B_6^+ clusters

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Science china Chemistry 2010年第1期53卷 202-209页

作者： WEI GongMin1,PU ZhiFeng2,ZOU Rong3,LI GuoLiang2,3 & LUO Qiong2,3 1Department of Physics,Capital Normal University,Beijing 100048,china 2State key laboratory of Explosion Science and Technology Beijing Institute of Technology,Beijing 100081,china 3Center for Computational Quantum Chemistry,South china Normal University,Guangzhou 510631,china 1. Department of Physics Capital Normal University Beijing 100048 China2. State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China3. Center for Computational Quantum Chemistry South China Normal University Guangzhou 510631 China

The interconversions between isomers with the same spin multiplicity of neutral B6 and charged B6-and B6+ clusters have been investigated at the B3LYP/6-311+G level of theory,including determination of the minimum energy pathways with transition states connecting the corresponding reactants and *** dynamic calculations,26 isomers were optimized,including 11 novel *** order to further refine the energies,single-point B3LYP/6-311+G(3df) calculations were carried out on the corresponding B3LYP/6-311+G geometries of all isomers of B6,B6-and B6+ and the corresponding isomerization transition *** stability of each isomer of B6(singlet and triplet states),B6-(doublet state) and B6+(doublet state) was analyzed from both thermodynamic and dynamic viewpoints.

关键词： B6 transition state intrinsic reaction coordinate barrier height

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Synthesis of N^(11)-anchoring biotinylated artemisinin derivatives and their preliminary biological assessment

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Science china Chemistry 2010年第1期53卷 119-124页

作者： PAN QiYu1,2,WANG ShaoZhong1,LU JinJian3,MENG LingHua3 & YAO ZhuJun1,2 1Nanjing National laboratory of Microstructures(NNLM),School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210093,china 2Joint laboratory of Green Chemistry,Department of Chemistry,University of Science and Technology of china,Hefei 230026,china 3State key laboratory of Drug Research,Shanghai Institute of Materia Medica,Shanghai Institutes for Biological Sciences,Chinese Academy of Sciences,Shanghai 201203,china. 1. Nanjing National laboratory of Microstructures (NNLM) School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China2. Joint Laboratory of Green Chemistry Department of Chemistry University of Science and Technology of China Hefei 230026 China3. State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 201203 China

Unique endoperoxide moiety of artemisinin and its derivatives has been considered the functionality exhibiting highly potent antimalarial and anticancer *** investigate the mechanisms of their biological actions,development of suitable molecular probes including biotinylated derivatives is of extreme *** synthesis and preliminary biological assessment of four new biotinylated artemisinin derivatives have been reported in this work.

关键词： artemisinin endoperoxide biotinylated derivative synthesis anticancer activity

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Method of Green’s function of nonlinear vibration of corrugated shallow shells

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Science china(Physics,Mechanics & Astronomy) 2008年第6期51卷 678-686页

作者： YUAN Hong key laboratory of Disaster Forecast and Control in Engineering, Ministry of Education of china, Institute of Applied Mechanics, Jinan University, Guangzhou 510632, china 1. key laboratory of Disaster Forecast and Control in Engineering Ministry of Education of China Institute of Applied Mechanics Jinan University Guangzhou 510632 China

Based on the dynamic equations of nonlinear large deflection of axisymmetric shallow shells of revolution, the nonlinear free vibration and forced vibration of a corrugated shallow shell under concentrated load acting at the center have been investigated. The nonlinear partial differential equations of shallow shell were re-duced to the nonlinear integral-differential equations by using the method of Green’s function. To solve the integral-differential equations, the expansion method was used to obtain Green’s function. Then the integral-differential equations were reduced to the form with a degenerate core by expanding Green’s function as a series of characteristic function. Therefore, the integral-differential equations be-came nonlinear ordinary differential equations with regard to time. The ampli-tude-frequency relation, with respect to the natural frequency of the lowest order and the amplitude-frequency response under harmonic force, were obtained by considering single mode vibration. As a numerical example, nonlinear free and forced vibration phenomena of shallow spherical shells with sinusoidal corrugation were studied. The obtained solutions are available for reference to the design of corrugated shells.

关键词： corrugated shells spherical shells Green’s function integral equation nonlinear vibration

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Accurate determination of the plate model based on CCD images with different orientations

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Chinese Science Bulletin 2010年第9期55卷 791-796页

作者： PENG QingYu1,2,3,4 & FAN LiangYan1,2,3,4 1 Joint laboratory for Astrometry, Dynamics and Space Science, Jinan University, Guangzhou 510632, china 2 Department of Computer Science, Jinan University, Guangzhou 510632, china 3 key laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Educational Institutes, Jinan University, Guangzhou 510632, china 4 Joint laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming 650011, china Joint laboratory for Astrometry Dynamics and Space Science Jinan University Guangzhou China Department of Computer Science Jinan University Guangzhou China key laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Educational Institutes Jinan University Guangzhou China Joint laboratory for Optical Astronomy Chinese Academy of Sciences Kunming China

The images of the open cluster NGC2168 are taken using the newly-fitted 2k×2k CCD attached to the 1-m telescope at the Yun-nan Observatory with two different orientations. After the catalogue position of a star from UCAC2 is compared with its corresponding measured position, a surprising result shows that a small field of view (about 7′×7′) exhibits an obvious distortion. Spe-cifically, the polynomial between the standard coordinate (ξ,η) and its corresponding measured one (x,y) for a star in each field of view has significant terms as high as 4th order. Accordingly, the positional measurement accuracy of a bright UCAC2 star can be derived as well as ~7 mas in each direction (60 s of exposure time and near the zenith). This new finding would be important for a CCD image to deliver a highly accurate position in its whole field of view.

关键词： CCD imaging field distortion positional measurement image analysis

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Anatomical reinvestigation of Archaeopteris macilenta from the Upper Devonian(Frasnian) of South china

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Journal of Systematics and Evolution 2011年第6期49卷 590-597页

作者： Yun GUO De-Ming WANG(key laboratory of Orogenic Belts and Crustal Evolution,Department of Geology,Peking University,Beijing 100871,china) (key laboratory of Orogenic Belts and Crustal Evolution Department of Geology Peking University Beijing 100871 China) *Correspondence: De-Ming WANG *Correspondence: E-mail: dmwang@*** Tel.: 86-10-62761095 Fax: 86-10-62751187.

Archaeopteris macilenta is one of the most widespread plants in the Late *** on fossils from the Frasnian Huangjiadeng Formation,Yichang District of Hubei Province,for the first time we study in detail the anatomy of this progymnosperm plant in South *** axes are protostelic with three xylem sympodia and lack secondary *** axes are eustelic,bearing eight sympodia and a thin band of secondary *** symmetrical sympodia of mesarch primary xylem produce traces of appendages in a spiral *** macilenta and ***(***)are dominant in the Frasnian and Famennian,*** with these two species from other tectonic plates indicate consistent stelar *** spread,continuous occurrence,and identical anatomy during the Late Devonian indicate that Archaeopteris survived the Frasnian-Famennian extinction *** this time,endemic genera and cosmopolitan taxa,including Archaeopteris,suggest the palaeogeographic isolation of South china and certain associations with other plates.

关键词： anatomy Archaeopteris Late Devonian palaeogeography progymnosperms South china.

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Level Set interface treatment and its application in Euler method

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Science china(Physics,Mechanics & Astronomy) 2010年第2期53卷 227-236页

作者： WU KaiTeng1,2,HAO Li3,WANG Cheng4 & ZHANG Li1,2 1 Numerical Simulation Sichuan Higher School key laboratory,Neijiang Normal University,Neijiang 641112,china 2 College of Mathematics and Information Science,Neijiang Normal University,Neijiang 641112,china 3 College of Science,Beijing University of Civil Engineering and Architecture,Beijing 100044,china 4 State key laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,china 1. Numerical Simulation Sichuan Higher School key laboratory Neijiang Normal University Neijiang 641112 China2. College of Mathematics and Information Science Neijiang Normal University Neijiang 641112 China3. College of Science Beijing University of Civil Engineering and Architecture Beijing 100044 China4. State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

Level Set interface treatment method is introduced into Euler method,which is employed for interface treatment method for multi-materials. Combined with the ghost fluid method,the moving interface is tracked. Fifth-order WENO spatial discretization and third-order TVD Runge-Kutta time discretization methods are used. Shock-wave action on bubble,implosion and velocity field Shock effect bubbles; implosion and velocity field are simulated by means of LS-MMIC3D programmed by C++. Nu-merical results show that the Level Set interface treatment method is effective and feasible for multi-material interface treatment in comparison with the WENO method.

关键词： Euler method Level Set method shock-wave action on bubble implosion numerical simulation

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Investigation on Vibrational Spectra and Structures of 4-Mercaptopyridine Monomer and Its Dihydrate

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Chemical Research in Chinese Universities 2006年第1期22卷 90-93页

作者： CHENG Jian-bo 1,2 , XUE Wei-qing 1 , ZHAO Bing 1** , ZHANG Gang 3 and GONG Bao-an 2 1. key laboratory for Supramolecular Structure and Material of Ministry of Education, Jilin University, Changchun 130012, P. R. china 2. Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, P. R. china 3. State key laboratory of Theoretical and Computational Chemistry, Jilin University, Changchun 130023, P. R. china [a]key laboratory for Supramolecular Structure and Material of Ministry of Education Jiln University Changchun 130012 P. R. China[b]Science and Engineering College of Chemistry and Biology Yantai University Yantai 264005 P. R. China[c]State Key Laboratory of Theoretical and Computational Chemistry Jiln University Changchun 130023 P. R. China

The optimized molecular structures and vibrational frequencies of 4-mercaptopyridine(4MPY) monomer and its dihydrate were studied by means of the density functional theory(DFT), viz. B3LYP method with the 6-311++G(d,p) basis set. On the basis of the calculations, the assignments of the vibrational spectra of the monomer and the dihydrate were performed, and so were investigated the changes in the structure and the vibrational spectrum of the dihydrate as well as the intermolecular force resulting in the formation of the dihydrate. The calculated results show that each of the water molecule planes is vertical to the pyridine ring plane in the dihydrate that is formed via the H-bonds between 4MPY and water molecules. Furthermore, the structure and the vibrational spectrum of 4MPY can be consi- derably affected by the water molecules.

关键词： 4MPY Dihydrate Vibrational spectra DFT Molecular structure

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