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Focal plane wave-front sensing algorithm for high-contrast imaging

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science china(Physics,Mechanics & Astronomy) 2009年第8期52卷 1284-1288页

作者： DOU JiangPei1,2,3.REN DeQing1,2,4,ZHU YongTian1,2 & ZHANG Xi1,2,3.1 National Astronomical Observatories/nanjing institute of Astronomical Optics & technology,Chinese Academy of sciences,nanjing 210042,china 2 Key Laboratory of Astronomical Optics & technology,nanjing institute of Astronomical Optics & technology,Chinese Academy of sciences,nanjing 210042,china 3.Graduate university of Chinese Academy of sciences,Beijing 100049,china 4 Physics & Astronomy Department,California state university Northridge,18111 Nordhoff street,Northridge,California 913.0-8268,UsA National Astronomical Observatories/nanjing institute of Astronomical Optics & technology Chinese Academy of Sciences Nanjing 210042 China Key Laboratory of Astronomical Optics & technology Nanjing Institute of Astronomical Optics & Technology Chinese Academy of Sciences Nanjing 210042 China Graduate university of Chinese Academy of sciences Beijing 100049 China Physics & Astronomy Department California State University Northridge 18111 Nordhoff Street Northridge California 91330-8268 USA

High-contrast imaging provided by a coronagraph is critical for the direction imaging of the Earth-like planet orbiting its bright parent star.A major limitation for such direct imaging is the speckle noise that is induced from the wave-front error of an optical *** derive an algorithm for the wave-front measurement directly from 3.focal plane *** 3.images are achieved through a deformable mirror to provide specific phases for the optics *** introduce an extra amplitude modulation on one deformable mirror configuration to create an uncorrelated wave-front,which is a critical procedure for wave-front *** simulation shows that the reconstructed wave-front is consistent with the original wave-front theoretically,which indicates that such an algorithm is a promising technique for the wave-front measurement for the high-contrast imaging.

关键词： high-contrast imaging multi-image algorithm speckle nulling technique wave-front sensing

Effects of binders on the performance of electric double-layer capacitors of carbon nanotube electrodes

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Progress in Natural science:Materials International 2005年第5期15卷 453-457页

作者： LI Chensha1*, WANG Dazhi1, ZHANG Baoyou2, WANG Xiaofeng1, CAO Maosheng3. and LIANG Ji1(1. Department of Mechanical Engineering, Tsinghua university, Beijing 100084, china 2. Center for Analysis and Measurement, Harbin institute of {3., Harbin 150001, china 3. school of Material science and Engineering, Tsinghua university, Beijing 100084, china) Department of Mechanical Engineering Tsinghua University Beijing 100084 China Center for Analysis and Measurement Harbin Institute of Technology Harbin 150001 China school of Material science and Engineering Tsinghua University Beijing 100084 China

Polarizable electrodes of electric double layer capacitor (EDLCs) were made from carbon nanotubes. Effects of different binders, which are phenolic resin (PF) and polytetrafluoroethylene (PTFE), on the properties of polarizable electrodes are studied. Results indicate that the microstructure, pore size distribution and specific capacitance of the electrodes with PTFE binder are superior to those electrodes with PF binder after carbonization. The suitable binder (PTFE) for carbon nanotubes electrodes is proposed.

关键词： carbon nanotubes electric double-layer capacitors phenolic resin polytetrafluoroethylene.

Parameter identification theory of a complex model based on global optimization method

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science china(Physics,Mechanics & Astronomy) 2008年第11期51卷 1722-1732页

作者： QU Jie1, JIN QuanLin2 & XU BingYe3.1 College of Automotive Engineering, south china university of technology, Guangzhou 510640, china 2 Beijing Research institute of Mechanical and Electrical technology, Beijing 100083. china 3.Department of Engineering Mechanics, Tsinghua university, Beijing 100084, china 1. College of Automotive Engineering South China University of Technology Guangzhou 510640 China 2. Beijing Research institute of Mechanical and Electrical technology Beijing 100083 China 3. Department of Engineering Mechanics Tsinghua University Beijing 100084 China

With the development of computer technology and numerical simulation technology, computer aided engineering (CAE) technology has been widely applied to many fields. One of the main obstacles, which hinder the further application of CAE technology, is how to successfully identify the parameters of the selected model. An elementary framework for parameter identification of a complex model is provided in this paper. The framework includes the construction of objective function, the design of the optimization method and the evaluation of the identified results, etc. The parameter identification process is described in this framework, taking the parameter identification of the superplastic constitutive model considering grain growth for Ti-6Al-4V at 927°C as an example. The objective function is the weighted quadratic sums of the difference between the experimental and computational data for the stress-strain relationship and the grain growth relationship; the designed optimization method is a hybrid global optimization method, which is based on the feature of the objective function and incorporates the strengths of genetic algorithm (GA), the Levenberg-Marquardt algorithm and the augmented Gauss-Newton algorithm. The reliability evaluation of parameter identification result is made through the comparison between the calculated and experimental results and between the theoretical values of the parameters and the identified ones.

关键词： constitutive model parameter identification theory inverse analysis global optimization

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 {3. of technology,Beijing 100081,china 3.enter for Computational Quantum Chemistry,south china Normal university,Guangzhou 51063.,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 B3.YP/6-3.1+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 B3.YP/6-3.1+G(3.f) calculations were carried out on the corresponding B3.YP/6-3.1+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

solidification of Municipal solid Waste Incineration FlyAsh with Cement and Its Leaching Behaviors of Heavy Metals

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Journal of Wuhan university of technology(Materials science) 2003年第1期18卷 55-60,68页

作者：余其俊 southchinauniversityoftechnology

The solidifying effect of cement addition on municipal solid waste incineration fly ash (MsWFA for short,collected from the gas exhaust system of MsW incinerator),the interaction of MsWFA with cement and water and the leaching of heavy metals from cement solidified MsWFA are *** main results show that:(1) when MsWFA is mixed with cement and water,H 2 evolution,the formation and volume expansion of AFt will take place,the volume expansion can be reduced by ground rice husk ash addition;(2) heavy metals do leach from cement solidified MsWFA and at lower pH more leaching will occur;(3. compared with cement-solidified fly ash,the leachate of solidified MsWFA is with higher heavy metal contents;(4) with the increment of cement addition leached heavy metals are decreased;and (5) concentrations of Zn,Mn,Cu and Cd in all the leachates can meet the relevant standards of Japan,but as the regulations for soil and groundwater protection of Japan are concerned,precautions against the leaching of Pb,Cl - and Cr 6+ and so on are needed.

关键词： municipal solid waste fly ash leaching heavy metals environmental impact

s-ordering operator expansions of quantum-mechanical fundamental representations and their applications

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science china(Physics,Mechanics & Astronomy) 2011年第12期54卷 2150-2154页

作者： FAN HongYi 1,3., XU YeJun 2 & YUAN HongChun 3.4 1 Department of Materials science and Engineering, university of science and technology of china, Hefei 23.026, china 2 Department of Physics Electronic and Engineering, Chizhou university, Chizhou 247000, china 3.Department of Physics, shanghai Jiao Tong university, shanghai 20003., china 4 College of Optoelectronic Engineering, Changzhou institute of technology, Changzhou 213.02, china 1. Department of Materials science and Engineering University of Science and Technology of China Hefei 230026 China3. Department of Physics Shanghai Jiao Tong University Shanghai 200030 China2. Department of Physics Electronic and Engineering Chizhou University Chizhou 247000 China4. College of Optoelectronic Engineering Changzhou Institute of Technology Changzhou 213002 China

We show that the quantum-mechanical fundamental representations, say, the coordinate representation, the coherent state representation, the Fan-Klauder entangled state representation can be recast into s-ordering operator expansion, which is elegant in form and has many applications in deriving new operator identities. This demonstrates that Dirac's symbolic method can be merged into Newton-Leibniz integration theory in a broad way.

关键词： s-ordering operator expansion operator identities quantum mechanical representation

Characteristics and origins of primary fluids and noble gases in mantle-derived minerals from the Yishu area,shandong Province,china

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science china Earth sciences 2006年第1期49卷 77-87页

作者： MA Jinlong1,2, TAO Mingxin2,3.& YE Xianren2 1. Resources and Environmental school, Lanzhou university, Lanzhou 73.000, china 2. Key Laboratory of Gas Geochemistry, institute of Geology and Geophysics, Chinese Academy of sciences, Lanzhou 73.000, china 3. College of Resources science & technology, Beijing Normal university, Beijing 100875, china 1. Resources and Environmental school Lanzhou University Lanzhou 730000 China 2. Key Laboratory of Gas Geochemistry Institute of Geology and Geophysics Chinese Academy of Sciences Lanzhou 730000 China 3. College of Resources science & technology Beijing Normal University Beijing 100875 China

Fluids and noble gases of mantle-derived materials are important tracers forthe mantle information. Compositions of primary fluids and noble gases in mantle-derived mineralsfrom the Yishu area, shandong Province, china, were tested by the methods of heat-bursting andheat-melting respectively. The fluids are mainly composed of CO_2, CO and H_2, which account forabout 90% of the total, and are similar to the mantle-derived rocks from other areas of easternchina; ratios of ~3.e/~4He in almost all samples range from 0.82 Ra to 2.74 Ra, whereas^(40)Ar/^(3.)Ar from 299.5 to 758.8. Both ranges are much lower than those of the typical oceanmantle-derived samples (such as MORB) and primarily reflect the influences of the atmosphericcomponents and the radiogenic isotopes. Ratios of C/~3.e range from 27.6 x 10~9 to 1050 x 10~9,N_2/Ar from 927 to 56612, and N_2/~3.e from 2.5 x 10~9 to 27 x 10~9, similar to those in westernUnited states and New Zealand which belong to the tectonic plate collision regions. The ratios fallin the intersect of mantle-crust-atmosphere in the comprehensive tracer-charts, reflecting theinfluences of the atmosphere and the crusts with organic components. Our results suggest that thecomposition of the primary fluids and the isotopic ratios of the noble gases may either reflect theevolution process of mantle-derived rocks connected with the rise and eruption of magma, or theinfluence of the ancient subduction-plate on the continental mantle of this region.

关键词： noble gases, primary fluids, mantle-derived minerals, Yishu area.

The precipitation and effect of nano nitrides in HsLC steel

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science china(Technological sciences) 2008年第7期51卷 989-998页

作者： FU Jie1, LIU YangChun1,2 & WU HuaJie1,3.1 school of Metallurgical and Ecological Engineering, university of science and technology Beijing, Beijing 100083. china 2 shougang technology Research institute, shougang (Group) Corporation, Beijing 100041, china 3.Metallurgical Engineering Research institute, university of science and technology Beijing, Beijing 100083. china 1. school of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China 2. shougang technology Research institute Shougang (Group) Corporation Beijing 100041 China 3. Metallurgical Engineering Research institute University of Science and Technology Beijing Beijing 100083 China

The existing forms of N and Al in HsLC (high strength low carbon) steel produced by TsCR (thin slab casting and rolling process), the precipitation thermodynamics and kinetics of AlN, and its effects on structure and mechanical property are studied. The experimental results show that only a small quantity of nitrogen is com- bined into AlN in HsLC steel produced by TsCR and most of the nitrogen in steel is still free nitrogen. Aluminum-nitride is mainly precipitated during the period of slow air cooling after coiling, but not during rolling and water cooling. The acid-soluble aluminum has no obvious effect on the grain size and mechanical property of HsLC steel produced by TsCR whose acid-soluble aluminum content is 0.005%―0.043.. The precipitation of AlN is not the main cause of grain refinement of HsLC steel produced by TsCR, nor is AlN the dominating precipitate that has precipitation strengthening effect. The nano nitrides are not pure AlN, but have complex compositions.

关键词： thin slab casting and rolling high strength low carbon steel AlN nano nitride precipitation strengthening

srGa_2s_4∶Ce blue TFEL in new structure

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Chinese science Bulletin 1998年第7期43卷 603-605页

作者： XU Chunxiang+1, LOU Zhidong+2, XU Zheng+3.and XU Xurong+3.. National Laboratory of Molecular and Biomolecular Electronics, southeast university, nanjing 210096, china 2. Department of Applied Physics, Tianjin university, Tianjin 3.003., china 3. Institu National Laboratory of Molecular and Biomolecular Electronics Southeast University Nanjina China Department of Applied Physics Tianjin University Tianjin China institute of Photoelectronic technology Northern Jiaotong University Beijing China

srGa-2s-4∶Ce blue TFEL device with a novel structure was prepared by electron beam evaporation. The dielectric constant of insulator layer in this structure is far less than that in the conventional structure, so the hot-electrons can be accelerated in siO-2 layers. The stable TFEL with good chromaticity was achieved and the basic characteristics were investigated.

关键词： srGa-2s-4∶Ce bule TFEL low dielectric constant insulator layer.