中国科学院机构知识库网格系统: 检索

Why do spiral galaxy know the matter distribution at 10 times of its scale? 期刊论文 OAI收割
2017, 期号: 0, 页码: 1
作者: Wang P(王鹏)

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收藏 | 浏览/下载：26/0 | 提交时间：2017/11/24

Galaxy Galaxies Align Preferentially Simply Observational Assume Outer Sdss Focusing

Image coding using wavelet-based compressive sampling (EI CONFERENCE) 会议论文 OAI收割
2012 5th International Symposium on Computational Intelligence and Design, ISCID 2012, October 28, 2012 - October 29, 2012, Hangzhou, China
作者: Li J.; Li J.; Li J.

收藏 | 浏览/下载：45/0 | 提交时间：2013/03/25

In this paper we proposed a novel coding scheme is proposed using wavelet-based CS framework for nature image. First two-dimension discrete wavelet transform (DWT) is applied to a nature image for sparse representation. After multi-scale DWT the low-frequency sub-band and high-frequency sub-bands are re-sampled separately. According to the statistical dependences among DWT coefficients we allocate different measurements to low- and high-frequency component. Then the measurements samples can be quantized. The quantize samples are entropy coded and forward correct coding (FEC). Finally the compressed streams are transmitted. At the decoder one can simply reconstruct the image via l1 minimization. Experimental results show that the proposed wavelet-based CS scheme achieves better compression performance against the relevant existing solutions.

The remote terminal design and implementation of 1553B based on DSP (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
Hui C. X.; Xue L.; Ming L. W.; Na Z. L.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

This paper proposes a remote terminal design of 1553B based on DSP (TMS320F2812) which is specially applicable to aviation airborne equipment. The bus of 1553B chip structures of DSP and BU-61580 are simply introduced also the hardware interface and software design between the DSP and agreement interface are illuminated. 2011 IEEE.

The influences of residual surface stress on the thermo-elastic bending of simply supported nanoplates 会议论文 OAI收割
3rd International Conference on Heterogeneous Materials Mechanics, ICHMM 2011, Shanghai, China, MAY 22-26, 2011
作者: Wang ZQ(王志乔); Zhao YP(赵亚溥); Wang ZQ; Wang ZQ

收藏 | 浏览/下载：32/0 | 提交时间：2013/02/26

Elasticity Interfacial energy Surface properties Classical plate theory Mechanical behavior Nano scale Nanoplates Simply supported Surface elasticities Surface residual stress Surface stress Thermal bending

The performance test and the application of CCD (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, June 17, 2009 - June 19, 2009, Beijing, China
作者: Wang S.-R.; Qu Y.; Zhang Z.-D.; Yang X.-H.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

The e2v technologies' CCD sensor CCD57-10 which will be used as a detector in the Limb UV Imaging Spectrometer is tested at first. Then the spectral responsivity calibration of the whole Imaging Spectrometer simply is described. The error analysis and the correction of the test of CCD's parameters under good repeatability and stability indicate that the properties of the CCD are suitable to the Limb UV Imaging Spectrometer. The spectral responsivity calibration and the theoretical calculation of the whole Imaging Spectrometer are within an acceptable error level. 2009 SPIE.

Super-resolved imaging system with oversampling technology (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者: Zhang X.; Wang L.-J.; Wang L.-J.; Zhang J.-P.; Liu Y.

收藏 | 浏览/下载：64/0 | 提交时间：2013/03/25

It has been a significant issue in the imaging filed to provide the highest possible resolution of an electro-optical imaging system(E-O imaging system). CCD arrays are inherently undersampled and spatial frequency above Nyquist frequency is distorted so as to create ambiguity and Moire patterns for targets imaged by E-O system.. As to this drawback a system-design project is introduced and discussed in the paper. It's well known that many image quality metrics are linked to MTF. However CCDs don't satisfy MTF condition namely the shift-invariant property so MTF synthesis can't appraise the whole system simply by the MTF product of the few sub-system ones in E-O imaging system. Then it is depicted how to solve this problem in the following. Finally the analyses and comparisons of the imaging performance parameters with and without super-resolved technologies are shown.

Research on the support structure of the primary mirror of large-aperture telescope (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China
Yang W.; Jingxu Z.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

Large-aperture telescope can be used in surveying battlefield researching landform searching object real-time monitoring imaging detecting and identifying spatial targets and so on. A large-aperture telescope for achieving high resolution power is designed to monitor spatial target and image in real time. Real-time monitoring plays an important role in military conflicts. The orbit parameter of object quantity geometrical shape parameter and so on can be obtained by detect spatial target. With the development of optical technology people require larger aperture in optics-electronic (OE) system. By increasing optical aperture the ability of collecting light and resolution power in the system can be enhanced. But the support structure of the primary mirror of large-aperture telescope will be a very difficult problem. With the increase of primary mirror aperture the weight of the primary mirror will become larger than before. The root mean square (rms) of the primary mirror is affected by many factors such as deadweight deformation of heat environment and so on. Due to the primary mirror of telescope is an important component of telescope system. By reducing the weight of primary mirror precision of the system is ensured. During the designing phase one can consider the supporting project of the primary mirror synthetically and analyze it roundly according to technical requirement of optical system and the effect factors. The final structural design can be reasonable. In an astronomical telescope the surface of reflector is an important part for collecting dark radiation of celestial bodies. Its surface shape will have an effect on collecting efficiency of telescope radiant energy directly. So the rms must be very high. Optical system of large aperture small wavelength and small focus can receive maximal light intensity. For ground-based optical astronomical telescope the design proposed in the paper can satisfy the requirement of the possible minimum atmosphere seeing at astronomical observatory site and exert the use efficiency of the telescope adequately. So the accuracy of the traditional surface of reflector can assure that 90% of all the light energy can be focused on within the angle diameter range of the minimum atmosphere seeing then 100% of light energy should be focused on the angle diameter range of minimum atmosphere seeing. Because the rms of mirror is very high precise surface machining and accurate the support of mirror are very important tasks during designing and manufacturing the telescope. In the paper various support techniques of a large-aperture telescope primary mirror are discussed and a 3.5 meter telescope system at the Starfire Optical Range (SOR) overviewed simply which was operated by the Directed Energy Directorate of the Air Force Research Laboratory Kirtland AFB NM USA from the ground-based O-E system for the observations of spatial target. We also analyze Theoretical elastic deformation of the Steward Observatory 2.3 meter mirror is analyzed.

Photonic micro and sub-micro structures in LiNbO3 crystals (EI CONFERENCE) 会议论文 OAI收割
ICO20: Materials and Nanostructures, August 21, 2005 - August 26, 2005, Changchun, China
作者: Wang P.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

High energy lasers processing of materials is knowing an increasing interest since it not only can make manufacturing faster cleaner and more accurate but also because it opens up entirely new technologies and manufacturing methods that are simply not available by using standard techniques. In this paper an experimental set-up based on pulsed KrF excimer Laser assembled for surface patterning of mono and two-dimensional (1D-2D) micro and submicro structures on LiNbO3(LN) crystal will be described in detail. The apparatus has been used to produce photonic structures in LN both by patterning of PMMA photoresist and by direct surface patterning through laser ablation or direct laser writing. The structures and properties of the photonic crystals fabricated by using this apparatus have been investigated and the preliminary results will be presented.

Ground condition sensing of a snake-like robot 会议论文 OAI收割
IEEE International Conference on Robotics, Intelligent Systems and Signal Processing, Changsha, China, October 8-13, 2003
作者: Lv Y(吕洋); Ma SG(马书根); Li B(李斌); Chen L(陈丽)

收藏 | 浏览/下载：30/0 | 提交时间：2012/06/06

Snake-like robot has its unique locomotion mode and can change its locomotion form while the ground condition changed to achieve the best velocity and efficiency. We first analyze the snake-like robot locomotion on different terrains simply then point out the significance to sense the ground status that is the base of choosing different locomotion form on different ground. Last we use force sensors to distinguish the different ground status.

非相似双电荷交换数值模型和结果(英文) 期刊论文 OAI收割
水电能源科学, 1986, 期号: 6, 页码: 28-33
作者: 杨真荣; 闫榕龄; 马维兴; 陈崇光; 王思问

收藏 | 浏览/下载：28/0 | 提交时间：2015/12/10

电荷交换多重积分分解方法数值模型分析模型计算程序 analog distortion simply transitions