中国科学院机构知识库网格系统: 检索

Design of Underwater Wireless Power Transmission System Based on Inductive Coupling 期刊论文 OAI收割
JOURNAL OF MARINE SCIENCE AND ENGINEERING, 2023, 卷号: 11, 期号: 9, 页码: 20
作者: Luo, Tianchu; Zhang, Shaowei

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收藏 | 浏览/下载：16/0 | 提交时间：2023/11/02

underwater wireless power transfer ocean observation inductive coupling eddy current loss magnetic coupler design

Increasingly important role of numerical modeling in oceanic observation design strategy: A review CNKI期刊论文 OAI收割
2020
作者: Kun ZHANG; Mu MU; Qiang WANG

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收藏 | 浏览/下载：1/0 | 提交时间：2024/12/18

Observation design Numerical modeling Targeted observation CNOP

Effects of site conditions on earthquake ground motion and their applications in seismic design in loess region 期刊论文 OAI收割
Journal of Mountain Science, 2017, 卷号: 14, 期号: 6, 页码: 1185-1193
作者: WANG Lan-min; WU Zhi-jian; XIA Kun

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收藏 | 浏览/下载：18/0 | 提交时间：2017/06/21

Loessial Site Field Investigation Ground Motion Observation Micro Tremor Observation Loess Topography Loess Thickness Site Effects Seismic Design

Advanced astigmatism-corrected tandem Wadsworth mounting for small-scale spectral broadband imaging spectrometer (EI CONFERENCE) 会议论文 OAI收割
作者:

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

Tandem gratings of double-dispersion mount make it possible to design an imaging spectrometer for the weak light observation with high spatial resolution high spectral resolution and high optical transmission efficiency. The traditional tandem Wadsworth mounting is originally designed to match the coaxial telescope and large-scale imaging spectrometer. When it is used to connect the off-axis telescope such as off-axis parabolic mirror it presents lower imaging quality than to connect the coaxial telescope. It may also introduce interference among the detector and the optical elements as it is applied to the short focal length and small-scale spectrometer in a close volume by satellite. An advanced tandem Wadsworth mounting has been investigated to deal with the situation. The Wadsworth astigmatism-corrected mounting condition for which is expressed as the distance between the second concave grating and the imaging plane is calculated. Then the optimum arrangement for the first plane grating and the second concave grating which make the anterior Wadsworth condition fulfilling each wavelength is analyzed by the geometric and first order differential calculation. These two arrangements comprise the advanced Wadsworth mounting condition. The spectral resolution has also been calculated by these conditions. An example designed by the optimum theory proves that the advanced tandem Wadsworth mounting performs excellently in spectral broadband. 2012 Optical Society of America.

High-resolution Fourier lens design (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
Gu S.; Liu C.; Jin G.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

This Fourier lens system is often used in optical signal processing system. Based on the design principles of Fourier lens system and the requirements of some particles observation experiment a Fourier optical system whose working wavelength was 532nm was designed using ZEMAX. The testing experiment using the visual microscope showed that the system's resolution was 250lp/mm. And the system was successfully used in the particles observation experiment. 2011 IEEE.

Understanding the enhancement of coating's thermal cracking resistance by multiple segmentation 会议论文 OAI收割
2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, Guangzhou, China, SEP 16-18, 2011
作者: Chen XJ(陈学军); Chen GN(陈光南); Chen XJ(陈学军)

收藏 | 浏览/下载：33/0 | 提交时间：2013/02/26

Coatings Crack initiation Cracking (chemical) Cracks Design Finite element method Stress intensity factors Thermal shock Thermal stress Cracking behavior Driving forces Experimental observation Hollow cylinders Multiple segmentation Outer surface Principle of superposition Segmentation crack Segmentation cracks Segmented coatings Steady state Thermal cracking Thermal shock resistance Thermal transients

Study of three-mode parametric instability (EI CONFERENCE) 会议论文 OAI收割
8th Edoardo Amaldi Conference on Gravitational Waves, June 21, 2009 - June 26, 2009, New York, NY, United states
Liang F.; Zhao C.; Gras S.; Ju L.; Blair G.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

The effect of parametric instability in advanced interferometric gravitational wave detectors is a potential problem for their proper operation. Great efforts have been made to study the onset of parametric instabilities and to find ways to control them. Here we present an experimental design for studying parametric instability in a 72 m cavity with suspended high quality fused silica mirrors. With 5 W input power and 20 kW circulation power inside the cavity it is predicted that parametric instability will occur. The resonant condition of parametric instability can be met by thermally tuning the radius of curvature of a test mass. We will present simulation results of parametric gains for different radii of curvature of a test mass. The simulation results will provide the basis for designing the thermal tuning and observation parametric instability experiments. This will provide a test bed for studying parametric instability and its control for next generation detectors. 2010 IOP Publishing Ltd.

Identification input design for consistent parameter estimation of linear systems with binary-valued output observations 期刊论文 OAI收割
IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 2008, 卷号: 53, 期号: 4, 页码: 867-880
作者: Wang, Le Yi; Yin, G. George; Zhao, Yanlong; Zhang, Ji-Feng

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收藏 | 浏览/下载：25/0 | 提交时间：2018/07/30

binary-valued observation distribution function identification input design parameter estimation sensor threshold sufficient excitation

Design of high-resolution fourier transform lens (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 L.; Zhang L.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

With the development of optical information processing high-resolution Fourier transform lens has often been used in holographic data storage system spatial filtering and observation of particles. This paper studies the optical design method of high-resolution Fourier transform optical lenses system which could be used in particles observation and holographic data storage system. According to Fourier transform relation between object and its frequency plane and the theory of geometrical optics the system with working wavelength 532nm and resolution 3 m was designed based on ZEMAX. A multi-configuration method was adopted to optimize the system's lenses. In the optical system a diaphragm was placed at the system's spectrum plane and the system demanded a low vacuum to cut down the influences of atmosphere and other particles. The result of finite element analysis indicated that the influences of vacuum pumping to optics spacing and mirror surface shape very minor and the imaging quality not being affected. This system has many advantages such as simple structure good image quality and a high resolution of 3 m. So it has a wide application prospect and can be used both in holographic data storage system and particles observation.

Application of CMOS APS star tracker with large FOV in attitude and angular velocity determination (EI CONFERENCE) 会议论文 OAI收割
Advanced Sensor Systems and Applications III, November 12, 2007 - November 14, 2007, Beijing, China
Lu D.; Guang J.; Shaoju W.; Tao C.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

The paper deals with the spacecraft attitude determination problem using a new kind of star tracker with large FOV based on CMOS APS. Star tracker has been developed since 1970s and proved to be the most accurate sensor ever used in the spacecraft attitude determination systems. But the traditional CCD star tracker also has some disadvantages such as small FOV high power consumption low sample rate and low working angular rate limit which prevent the use of CCD star tracker in attitude large angle maneuvering process. The new kind of star tracker based on CMOS APS has no such disadvantages and is more applicable on modern low-cost agile small satellites. Its higher sample rate and working angular rate limit over traditional CCD star tracker make it more adapt for spacecraft angular velocity determination. Because of the large FOV of the star tracker the mathematical model of traditional CCD star tracker with a small FOV is not appropriate. So a new mathematical model was quoted to fit the star tracker with a large FOV. An alternative adaptive algorithm was also introduced in the paper. It can help the EKF algorithm work lacking of accurate covariance of the observation noise. An optimal estimation algorithm was used to estimate the angular velocity directly from the star tracker measurements. Mathematic simulation results indicate the CMOS APS star tracker can give accurate attitude information and estimated angular rate. The method can be used as the chief attitude determination system design of low-cost satellite without gyros or be used as a backup strategy in the event of gyro failures to enhance the reliability of the attitude determination system.