中国科学院机构知识库网格系统: 检索

Monitoring the Performance of HY-2B and Jason-2/3 Sea Surface Height via the China Altimetry Calibration Cooperation Plan 期刊论文 OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2022, 卷号: 60, 页码: 13
作者: Yang, Lei; Xu, Yongsheng; Lin, Mingsen; Ma, Chaofei; Mertikas, Stelios P.

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收藏 | 浏览/下载：51/0 | 提交时间：2022/07/18

Calibration Satellites Altimetry Tides Global navigation satellite system Monitoring Meteorology Calibration and validation (Cal Val) Global Navigation Satellite System (GNSS) HY-2B Jason satellite radar altimeter sea level tide gauge

Exploring the anisotropic Kondo model in and out of equilibrium with alkaline-earth atoms 期刊论文 OAI收割
PHYSICAL REVIEW B, 2018, 卷号: 97, 期号: 15, 页码: 155156
作者:

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收藏 | 浏览/下载：133/0 | 提交时间：2018/12/27

CONFORMAL-FIELD-THEORY NUMERICAL RENORMALIZATION-GROUP CONSISTENT PERTURBATION-THEORY DISSIPATIVE 2-STATE SYSTEM QUANTUM PHASE-TRANSITIONS DILUTE MAGNETIC-ALLOYS OPTICAL LATTICE CLOCK GAPLESS FERMI SYSTEMS 2-LEVEL SYSTEM LOW-TEMPERATURES

Ultrastrong Coupling Few-Photon Scattering Theory 期刊论文 OAI收割
PHYSICAL REVIEW LETTERS, 2018, 卷号: 120, 期号: 15, 页码: 153602
作者: Garcia-Ripoll, JJ; Shi, T; Chang, Y

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收藏 | 浏览/下载：23/0 | 提交时间：2018/12/27

ENTANGLED PAIR STATES MATRIX PRODUCT STATES VARIATIONAL CALCULATION 2-LEVEL SYSTEM DYNAMICS BATH ATOM

Study of horizontal shafting with spherical four-way structure (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Yang L.; Yang L.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

Altazimuth photoelectric theodolite level shaft U-type and T-type structure but with the expanding field of applications of photoelectric theodolite the horizontal shaft structure occur great changes. For example in the marine environment shipboard conditions the instrument has a waterproof corrosion-resistant easy maintenance and other functions while carrier-based optoelectronic devices from a single visible television configure the development of integrated infrared system and ranging system as one of the single-station measurement system due to the spherical structure has sufficient internal space exactly adapted to this need. In this paper the horizontal axis of a spherical four-way structure. From aspects of the spherical four-way split in the form and shafting design and finite element analysis of the detailed design. A spherical four-way horizontal axis system diameter 550mm weight 19kg sphere in the 40kg load the maximum deformation of 3.3m fully meet the requirements. The shaft of the structure of the shaking is less than 2 arc seconds the vibration test the re-examination instrument accuracy change is less than 1 arc seconds. Verify that the structure is stable and reliable. 2012 IEEE.

The application of diagnostic equipment in the Tokamak fusion reaction (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, November 6, 2011 - November 9, 2011, Beijing, China
Zhang B.-S.; Chang J.; Gong X.-Z.; Gan J.-F.; Feng S.-L.

收藏 | 浏览/下载：16/0 | 提交时间：2013/03/25

This paper introduces the infrared optical system in the Tokamak fusion reaction device. In this optical system 3.the relay group lenses. This paper describes the decrease of the modulation transfer function (MTF) when the temperature changes and how to compensate the decrease of the MTF in order to maintain the image quality in a high level. As a result the traditional optical structure can't meet the requirements 2.the Cassegrain system the image quality of this optical system can reach the requirements when the temperature changes. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE). because the length of the infrared optical system in the Tokamak is very long. The design of optical system in the detection facility includes three parts:1.the combination of the concave aspheric mirror and flat mirror

Timing generator of scientific grade CCD camera and its implementation based on FPGA technology (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
作者: Li Y.; Li Y.; Li Y.; Li Y.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

The Timing Generator's functions of Scientific Grade CCD Camera is briefly presented: it generates various kinds of impulse sequence for the TDI-CCD video processor and imaging data output acting as the synchronous coordinator for time in the CCD imaging unit. The IL-E2TDI-CCD sensor produced by DALSA Co.Ltd. use in the Scientific Grade CCD Camera. Driving schedules of IL-E2 TDI-CCD sensor has been examined in detail the timing generator has been designed for Scientific Grade CCD Camera. FPGA is chosen as the hardware design platform schedule generator is described with VHDL. The designed generator has been successfully fulfilled function simulation with EDA software and fitted into XC2VP20-FF1152 (a kind of FPGA products made by XILINX). The experiments indicate that the new method improves the integrated level of the system. The Scientific Grade CCD camera system's high reliability stability and low power supply are achieved. At the same time the period of design and experiment is sharply shorted. 2010 Copyright SPIE - The International Society for Optical Engineering.

Application of multi-sensors parallel fusion system in photoelectric tracing (EI CONFERENCE) 会议论文 OAI收割
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Cheng G.-Y.; Cai S.; Gao H.-B.; Zhang S.-M.; Qiao Y.-F.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

To solve the real-time and reliability problem of tracking servo-control system in optoelectronic theodolite a multisensors parallel processing system was proposed. Misdistances of three different wavebands were imported into system and then prediction was done in DSP1 to get the actual position information. Data fusion was accomplished in PPGA imported by multi channel buffer serial port. The compound position information was used to control the theodolite. The results were compared with external guide data in DSP2 to implement correction of above calculation and then were imported to epistemic machine through PXI interface. The simulation experiment of each calculation unit showed that this system could solve the real-time problem of feature level data fusion. The simulation result showed that the system can satisfy the real-time requirement with 1.25ms in theodolite with three imaging systems while sampling frequency of photoelectric encoder was 800 Hz. 2009 SPIE.

Photon higher-order squeezing effects of the q analogue of a single-mode field interacting with a Xi-type three-level atom 外文期刊 OAI收割
2009
作者: Liu, XY; Zhang, HH; Shen, HJ; Zhou, JT

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收藏 | 浏览/下载：20/0 | 提交时间：2010/11/26

Jaynes-cummings Model Coherent States 2-level Atom Quantum Oscillator Generation Evolution Entropy System

Regional crop yield, water consumption and water use efficiency and their responses to climate change in the North China Plain SCI/SSCI论文 OAI收割
2009
Mo X. G.; Liu S. X.; Lin Z. H.; Guo R. P.

收藏 | 浏览/下载：16/0 | 提交时间：2012/06/08

VIP model Winter wheat-summer maize double cropping system Evapotranspiration Yield level Photosynthesis winter-wheat yields elevated co2 weighing lysimeter biochemical-model change scenarios carbon-dioxide change impacts united-states photosynthesis productivity

The effect on tolerance distributing of an off-axis three mirror anastigmatic optical system with wavefront coding technology (EI CONFERENCE) 会议论文 OAI收割
Optical System Alignment and Tolerancing II, August 10, 2008 - August 11, 2008, San Diego, CA, United states
作者: Yan F.; Zhang X.-J.; Yan F.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

The wavefront coding technology is known as a system-level technology which can extend the depth of focus of optical system by innovative optical design and image restoration. This technology can control misfocus related aberrations including misfocus astigmatism and Petzval curvature temperature-related misfocus in digital imaging systems. It can also help optical system tolerate more residual error in optical manufacturing and alignment besides misfocus. The brief introduction of wavefront coding technology and the wavefront coded TMA system under research is presented respectively in part 1 and part 2. The "MTF similarity" is defined to describe the relationship among MTF at different position or different fields in the third part. It is also shown in this part that the MTF similarity of wavefront coded system is much higher than the normal system within a large range. In part 4 comparison between the origin system and the new system with wavefront coding technology is provided after multiple errors are introduced from which it can be observed that the system with wavefront coding technology can tolerate much bigger error than origin system. The error tolerance is re-distributed according to a new criterion based on MTF similarity. If the MTF similarity is less than a certain value it can be regarded that the system can tolerate the residual error. The new error tolerance is displayed and it is shown that the wavefront coding technology can also loosen the error distributing besides extended the depth of focus.