中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共7条，第1-7条

帮助

条数/页：排序方式：
	Beam optics study for energy selection system of SC200 superconducting proton cyclotron 期刊论文 OAI收割 NUCLEAR SCIENCE AND TECHNIQUES, 2018, 卷号: 29, 期号: 9, 页码: 8 作者: Zeng, Xian-Hu; Zheng, Jin-Xing; Song, Yun-Tao; Jiang, Feng; Li, Ming \| 收藏 \| 浏览/下载：22/0 \| 提交时间：2019/11/11 Proton therapy Beam optics ESS Transmission efficiency Orbit distortion correction
	Spontaneous Structural Distortion and Quasi-One-Dimensional Quantum Confinement in a Single-Phase Compound 期刊论文 OAI收割 ADVANCED MATERIALS, 2013, 卷号: 25, 期号: 2, 页码: 218 Wang, ZC; Gu, L; Saito, M; Tsukimoto, S; Tsukada, M; Lichtenberg, F; Ikuhara, Y; Bednorz, JG 收藏 \| 浏览/下载：19/0 \| 提交时间：2014/01/17 oxide heterostructures structural distortion quantum confinement scanning transmission electron microscopy first-principles calculations
	Efficient rate control technique for CCSDS image encoding (EI CONFERENCE) 会议论文 OAI收割 IEEE 2nd International Conference on Computing, Control and Industrial Engineering, CCIE 2011, August 20, 2011 - August 21, 2011, Wuhan, China Jin L. 收藏 \| 浏览/下载：93/0 \| 提交时间：2013/03/25 For the limitation of data transmission bandwidth and real time transmission demand generally image compression is required to implement the precise and flexible rate control algorithm. Rate control is an important issue in the image compression field. This paper considers the problem of rate allocation to each encoded segment for CCSDS image compression. One straightforward method is to allocate an equal amount of rate to each segment based on the average of the total number of compressed bytes. The obvious drawback of this method is that different segment will be reconstructed to different quality so the overall quality of the reconstructed image will not be optimized. For the shortage of the original rate control method as to improve the overall quality of the reconstructed image an improved rate control algorithm is proposed for CCSDS image encoding. The key component of the proposed rate control method is the appropriate rate allocation. Experiments on the test images show that the PSNR can be increased at about 0.3dB on average compared to the original algorithm. Therefore experimental results confirm the effectiveness of the proposed algorithm in terms of objective evaluation and the rate-distortion performance of the reconstructed image is improved. 2011 IEEE.
	Design of transmission of high-speed CCD driving signals (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 作者: Zhang S. 收藏 \| 浏览/下载：68/0 \| 提交时间：2013/03/25 In order to overcome the distortion problem of CCD driving signals caused by signal transmission the detail implementation of transmission of high-speed CCD driving signals based on transmission line theory is discussed. The CCD driving signals are critical to the CCD to produce high quality images. In high speed application these drivers will occupy more circuit board areas and can not be put very close to the CCD. So the driving signals must be transmitted. Because the CCD exhibits capacitive load the driving signals distortion problem is much severe. Transmission line theory is used to analyze the problem. The method of source termination is adopted to avoid signal reflections. Meanwhile the characteristic impedance of the circuit board and the resistance of terminal resistor are designed small enough to decrease the rising and falling time of the driving signals. Experimental results show that there is no distortion of the high speed driving signals after transmission. 2011 IEEE.
	Constructing an initial map of transmission distortion based on high density hapmap snps across the human autosomes 期刊论文 iSwitch采集 Journal of genetics and genomics, 2009, 卷号: 36, 期号: 12, 页码: 703-709 作者: Deng, Libin; Zhang, Dake; Richards, Elliott; Tang, Xiaoli; Fang, Jin 收藏 \| 浏览/下载：50/0 \| 提交时间：2019/05/10 Transmission distortion Hapmap project Gene ontology
	Design of optical lens for space tridimensional mapping camera (EI CONFERENCE) 会议论文 OAI收割 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China 作者: Wang Z.; Wang Z.; Zhang L.-P. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 Three-linear array tridimensional mapping camera consists of three independent linear CCD cameras. Unique position must be kept among the three linear CCD cameras. Optical lens is one of pivotal parts MTF the ground resolution power is 5m resolving power the distortion is 3/10000. They meet the need of user. 2009 SPIE. distortion are its important techno-items. The optical lens of space tridimensional mapping camera is the key to accomplish the tridimensional mapping mission. In order to meet the need of user a design on optical lens of transmission semi-telecentric beam path in image space is expounded and assembly method based on DFT(Design For Test) of single lens suit and whole optical lens are expounded. The test results indicates that the MTF of optical lens referred in the paper is 0.45(@77lp/mm)
	Effects of fabricated error on transmission performance of double screens cross loop slot FSS configuration (EI CONFERENCE) 会议论文 OAI收割 2006 7th International Symposium on Antennas, Propagation and EM Theory, ISAPE 2006, October 26, 2006 - October 29, 2006, Guilin, China 作者: He B. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 This paper proposes that the inter-layer separation distance (ISD) and the unit cell aligning error (UAE) are used as main variables to study the transmission performance attenuation of the double layer FSS configuration. The numerical analysis model for ISD and UAE was established and also was used to simulate the cross loop slot cell FSS transmission performance by the finite element and periodic moment method program. The double layer cross loop aperture FSS configuration designed was used as the numerical model. As a result of the numerical analysis it is shown that both ISD and UAE produce insertion transmission loss (ITL) and insertion phase distortion (IPD) directly. Furthermore ISD results in much loss of the amplitude of the transmitted signal for the FSS than UAE. It is significant for the designer for the multiplayer FSS to assign the fabricated error of the FSS dielectric layers. The UAE introduces the insertion phase variation badly.