检索结果-南通市图书馆

The global image of the Moon obtained by the Chang'E-1:Data processing and lunar cartography

Science china Earth sciences 2010年第8期53卷 1091-1102页

作者： LI ChunLai1, LIU JianJun1, REN xin1, MOU LingLi1, ZOU YongLiao1, ZHANG HongBo1, Lü Chang1, LIU JianZhong1, ZUO Wei1, SU Yan1, WEN WeiBin1, BIAN Wei1, ZHAO BaoChang2, YANG JianFeng2, ZOU xiaoDuan1, WANG Min1, XU Chun1, KONG DeQing1, WANG xiaoQian1, WANG Fang1, GENG Liang1, ZHANG ZhouBin1, ZHENG Lei1, ZHU xinYing1, LI JunDuo1 & OUYANG ZiYuan11 National Astronomical Observatories, chinese academy of sciences, Beijing 100012, china 2 xi’an institute of optics and precision mechanics, chinese academy of sciences, xi’an 710119, china 1. National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China2. Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xi’an 710119 China

The global lunar image of the first phase of chinese Lunar Exploration Program is the first image that covered all over the surface of the Moon. It will serve as a critical foundation for succeeding exploration and scientific research. In this paper, the acquisition, characteristics, and data quality of Chang'E-1 CCD image data are described in detail. Also described are the methodology and procedure of data processing. According to rule of planetary cartography, the image data have been processed, geometrically corrected, and then mosaicked and merged in a scale of 1:2.5 million. The results of data processing and charting show that the image data of Chang'E-1 CCD and their geometric precision meet the demand of charting a map in the scale of 1:2.5 million. The relative geometric positioning precision of the global image is better than 240 m, and the absolute geometric positioning precision is slightly better than that of the ULCN2005 and Clementine lunar basemap (V2.0). The plane positioning precision is approximately 100-1500 m. This global image proves to be the best global image of the Moon so far in terms of space coverage, image quality, and positioning precision.

关键词： Chang’E-1 lunar CCD data processing lunar image position lunar global image

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 compact interferometer insensitive to scanning speed variations

引用

chinese optics Letters 2013年第2期11卷 51-54页

作者：杨庆华赵葆常曾晓东 School of Technical Physics Xidian University xi'an institute of optics and precision mechanics Chinese Academy of Sciences

A compact moving optical-wedge interferometer （CMOWI） is presented. This device consists of a moving optical wedge （MOW）, a fixed optical wedge （FOW）, a fixed compensating plate, and a beam-splitting cube. The optical path difference （OPD） is calculated and analyzed. The factor between the OPD and the displacement of the MOW is less than 1 if the refractive index and wedge angle of the MOW and FOW are chosen properly. Therefore, the CMOWI is insensitive to scanning speed variations compared with the traditional Michelson interferometer. The CMOWI is compact, small-sized, and suitable for low-resolution Fourier transform spectroscopy.

关键词： Michelson interferometers

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

Dispersion imaging spectrometer for detecting and locating energetic targets in real time

引用

chinese optics Letters 2013年第6期11卷 30-33页

作者：杨庆华曾晓东赵葆常 School of Technical Physics Xidian University xi'an institute of optics and precision mechanics Chinese Academy of Sciences

A conceptual dispersion imaging spectrometer （DIS） is proposed. It consists of a telescope, four prisms, an imaging lens, and a detector. The first prism allows only the first set of wavelengths along the first direction to pass and disperse. The second prism allows only the second set of wavelengths along the second direction, which is perpendicular to the first. The third and fourth prisms are used to compensate for the angular deviations from the optical axes of the first and second prisms, respectively. The proposed DIS disperses the spectra of a target to form an L-shaped dispersion pattern （LDP）. The theoretical calculation and numerical simulation of the LDP are presented. The DIS can locate multiple targets based only on data obtained from a single frame. It is suitable for detecting and locating energetic targets in real time.

关键词： Dispersions Prisms Spectrometers

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

Simultaneous Strain and Temperature Measurement with Optical Fiber Gratings: Error Analysis

引用

chinese Journal of Lasers 2000年第3期9卷 52-57页

作者： JIA Hongzhi LI Yulin (xi’an institute of optics & precision mechanics, The chinese academy of sciences, xi’an 710068, china) 中科院西安光学精密机械所陕西西安

Many schemes designed to simultaneously measure strain and t emperature with optical fiber grating sensors have been reported in recent years. In this paper, the influence of systematic errors associated with the measurement process is analyzed and the error formulas are derived. The results are applied to a range of techniques that are of current interest in the literature. The performance of these schemes is contrasted with respect to the influence of wavelength measurement error and sensitivity matrix error.

关键词： fiber grating sensors strain measurement temperature measurement error analysis

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

Energy Transfer among Chlorophylls in Trimeric Light-harvesting Complex Ⅱ of Bryopsis corticulans

引用

Acta Biochimica et Biophysica Sinica 2006年第5期38卷 310-317页

作者： Su-Juan ZHANG~(1,2*)Shui-Cai WANG~2 Jun-Fang HE~2 Hui CHEN~3 1 institute of Photonics and Photo-Technology,Northwest University,xi'an 710069,china 2 State Key Laboratory of Transient optics and Photonics,xi 'an institute of optics and precision mechanics,chinese academy of sciences,xi'an 710068.china 3 Laboratoty of Photosynthesis Basic Research,institute of Botany,chinese academy of sciences,Beijing 100093,china institute of Photonics and Photo-Technology Northwest UniversityXi'an 710069 China State Key Laboratory of Transient optics and Photonics Xi'an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi'an 710068 China Laboratory of Photosynthesis Basic Research Institute of Botany Chinese Academy of SciencesBeijing 100093 China

A study on energy transfer among chlorophylls（Chls）in the trimeric unit of the major light-harvesting complex Ⅱ（LHC Ⅱ）from Bryopsis corriculan,was carried out using time-correlated singlephoton *** the chlorophyll Q region of LHC Ⅱ,six molecules characterized as Chlb628,Chlb646,Chlb652654,657,Chla664666,Chla674677.680and Chla682683were discriminated according to their absorption spectrumand fluorescence emission ***,excited by pulsed light of 628 nm,fluorescence kinetics spectrain the chlorophyll Q region were *** accordance with the principles of fluorescence kinetics,thesekinetics data were analyzed with a multi-exponential *** constants on energy transfer were *** overwhelming percentage of energy transfer among chlorophylls undergoes a process longer than 97picoseconds（ps）,which shows that,before transferring energy to another Chl,the excited Chl might convertenergy to vibrations of a lower state with different multiplicity（intersystem crossing）.Energy transfer at thelevel of approximately 10 ps was also obtained,which was interpreted as the excited Chls may go throughinternal conversion before transferring energy to another *** with a higher standard deviation,timeconstants at the femtosecond level can not be entirely excluded,which can be attributed to the ultrafastprocess of direct energy *** to the arrangement and direction of the dipole moment of Chls inLHC Ⅱ,the probability of these processes is *** fluorescence lifetimes of Chlb652654,657,Chla664666,Chla674677.680and Chla682683were determined to be 1.44ns,1.43 ns,636 ps and 713 ps,*** of energy dissipation in the pathway of fluorescence emission were no more than 40% in thetrimeric unit of LHC Ⅱ.These results are important for a better understanding of the relationship between thestructure and function of LHC Ⅱ.

关键词： energy transfer LHC Ⅱ transient spectrum fluorescence kinetics

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

Experimental study on high power all-fiber laser

引用

chinese optics Letters 2010年第4期8卷 404-406页

作者：赵保银段开椋赵卫李成王屹山 State Key Laboratory of Transient optics and Photonics xi'an institute of optics and precision mechanics Chinese Academy of Sciences Graduate University of chinese academy of sciences

A high power all-fiber laser is experimentally studied.A monolithic fiber laser system with only one stage of resonator cavity is constructed and 404-W continuous wave（CW） output power is *** opticalto -optical conversion efficiency is up to 64%.The laser central wavelength is at 1081 nm with the spectral full-width at half-maximum（FWHM） of 2 *** laser setup can work with excellent stability;in the long time of high power operation,no thermal distortions or damages are observed.

关键词： Conversion efficiency

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

Fabrication of sub-micro size PZT array and their ferroelectric properties

引用

Science china(Technological sciences) 2006年第6期49卷 693-700页

作者： ZHAO Gaoyang1, ZHANG Weihua1, XU Guomin1, DENG xiaocui1, JIANG Bailing1 & ZHAO Wei2 1. School of Materials Science and Engineering, xi’an University of Technology, xi’an 710048, china 2. xi’an institute of optics and precision mechanics of CAS, xi’an 710048, china 1. School of Materials Science and Engineering Xi’an University of Technology Xi’an 710048 China 2. xi’an institute of optics and precision mechanics of CAS Xi’an 710048 China

The photosensitive PZT sols and their gel films were prepared by sol-gel process. Based on the photosensitivity of the PZT gel films, two-dimensional (2D) array of the PZT gel film was fabricated using twice-exposure of double-beam interference on the gel film. PZT gel films coated on ITO/quartz substrate were exposed to an interference fringe of 325 He-Cd laser beams, the substrate was rotated by 90° between the first and second irradiation steps. Island type periodic 2D array structures with a pitch of 1 μm and cell size of about 480 nm × 480 nm × 40 nm were formed after the irradiation, and followed by leaching with organic solvent, and then by heat treatment at 600°C for 15 min. The hysteresis loops of the cell in PZT array were in-situ measured by the online-operation of TF analyzer and atomic force microscope (AFM). The probe can be located on the locked cell of PZT array in the AFM image. The alternating voltage applied to the locked cell is supplied by the TF analyzer through the conductive coating probe, and then the test signal is fed back to the TF analyzer to obtain the hysteresis loop of the locked cell of array in the absence of top electrode. The results show that the sub-micro size PZT arrays prepared in this way are of polarization reversal characteristics with the alternating electric fields, thereby exhibiting obvious ferroelectricity.

关键词： PZT, ferroelectric films, photosensitivity, hysteresis loop.

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

Preparations on Several GRIN Lenses

引用

光学学报 2003年第S1期23卷 23-24页

作者： Li Yulin, Wang Weiping, Zhang xiangdong, Huo Junmin (xi’an institute of optics & precision mechanics, The chinese academy of sciences xi抋n institute of optics & precision mechanics The Chinese Academy of Sciences

Gradient index materials have been developed from glass melting process to GRIN lenses. Two kinds of GRIN lenses have been fabricated by ion-exchange and glass fusion/diffusion. The main applications to GRIN lenses ar... 详细信息

关键词： have GR of in been Preparations on Several GRIN Lenses on

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

Studies　on　Passive　Mode－Locking　Characteristics　of　Nd：YAG　Laser　With　a　Nonlinear　Coupled－Cavity

引用

chinese Journal of Lasers 1995年第1期B4卷 19-24页

作者： CHENG Zhao XU Dalun(State Key Laboratory of Transient optics and Technology,xi an institute of optics and precision mechanics,Academia Sinica,xi,an 710068, china) xi'an Inst of optics and precision Mechanics Xi'an China

ＳｔｕｄｉｅｓｏｎＰａｓｓｉｖｅＭｏｄｅ－ＬｏｃｋｉｎｇＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＮｄ：ＹＡＧＬａｓｅｒＷｉｔｈａＮｏｎｌｉｎｅａｒＣｏｕｐｌｅｄ－ＣａｖｉｔｙＳｔｕｄｉｅｓｏｎＰａｓｓｉｖｅＭｏｄｅ－Ｌｏｃ... 详细信息

ＳｔｕｄｉｅｓｏｎＰａｓｓｉｖｅＭｏｄｅ－ＬｏｃｋｉｎｇＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＮｄ：ＹＡＧＬａｓｅｒＷｉｔｈａＮｏｎｌｉｎｅａｒＣｏｕｐｌｅｄ－ＣａｖｉｔｙＳｔｕｄｉｅｓｏｎＰａｓｓｉｖｅＭｏｄｅ－ＬｏｃｋｉｎｇＣｈａｒａｃｔｅｒｉｓｔｉ...

关键词： Coupled-cavity mode locking resonant passive mode-locking high-repetition-rate laser

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

Electronic structure and magnetism of Fe-doped SiC nanotubes

引用

Science china(Physics,mechanics & Astronomy) 2010年第9期53卷 1582-1589页

作者： ZHANG WeiHu1,2,3,ZHANG FuChun3,ZHANG ZhiYong4,LU ShuYuan5 & YANG YanNing3 1 xi’an institute of optics and precision mechanics,chinese academy of sciences,xi’an 710068,china 2 Graduate University of chinese academy of sciences,Beijing 100049,china 3 College of Physics and Electronic Information,Yan’an University,Yan’an 716000,china 4 Information Science and Technology Institution,Northwest University,xi’an 710127,china 5 Department of Telecommunications,xi’an institute of Posts and Telecommunications,xi’an 710121,china 1. xi’an institute of optics and precision mechanics Chinese Academy of Sciences Xi’an 710068 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. College of Physics and Electronic Information Yan’an University Yan’an 716000 China4. Information Science and Technology Institution Northwest University Xi’an 710127 China5. Department of Telecommunications Xi’an Institute of Posts and Telecommunications Xi’an 710121 China

The electronic structure and magnetic properties of Fe-doped SiC nanotubes are investigated by using the first-principles method based on density functional theory(DFT) in the local spin density approximation(LSDA).The calculation results indicate that the SiC nanotube of Fe substitution for C exhibits antiferromagnetism while ferromagnetism features prominently when Fe substitutes *** is a kind of half-metal magnetic *** formation energy calculation results show that the formation energy of ferromagnetic structure is 3.2 eV lower than that of antiferromagnetic *** atoms are more likely to replace Si ***-orbit coupling induces electron spin polarization in the ground ***,the doping Fe atoms make relaxation towards the outside of the tube to some extent and larger geometric distortion occurs when Fe substitutes C,but the whole geometric structure of SiC nanotubes is not damaged due to the *** is revealed in the calculation of energy band structure and density of states that more dispersed distribution of energy levels is produced near the Fermi *** Fe substitution for Si,obviously there are spin-split and intense p-d hybrid effects by Si 3p electron spins and Fe 3d electron spins localized at the exchanging interactions between magnetic transitional metal(TM) *** electronic density results indicate that system magnetic moments are mainly generated by the unpaired 3d electrons of Fe *** these results show that the transition metal doping SiC nanotube could be a potential route to fabricating the promising magnetic materials.

关键词： SiC nanotube the first-principles doped magnetic properties

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

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：