中国科学院机构知识库网格系统: 检索

A Multiwavelength Study of PSR J1119-6127 after 2016 Outburst 期刊论文 OAI收割
ASTROPHYSICAL JOURNAL, 2020, 卷号: 902, 期号: 2, 页码: 11
作者: Wang, H-H; Lin, L. C-C; Dai, S.; Takata, J.; Li, K. L.

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收藏 | 浏览/下载：48/0 | 提交时间：2020/11/30

Penumbra Periodic variable stars Photographic astrometry Polar caps Proton-proton reaction X-ray bright point X-ray point sources Plasma astrophysics Phase error Phase effect Model selection Neutron stars

Structure design and wavelength accuracy analysis of ultraviolet double grating spectrometer 期刊论文 OAI收割
Chinese Optics, 2018, 卷号: 11, 期号: 2, 页码: 219-230
作者: Cao, Dian-Sheng; Lin, Guan-Yu; Yang, Xiao-Hu; Zhang, Zi-Hui; Wen, Bao-Peng

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收藏 | 浏览/下载：16/0 | 提交时间：2019/09/17

Spectrometers Error analysis Lead screws Light sources Mechanisms Scanning Screws

Methods and Error Analysis of Helium Pipe Temperature measurement in the EAST Superconducting Magnet System 期刊论文 OAI收割
低温物理学报, 2014
作者: Qian J(钱静); Sun Y(孙越); Wu H(吴浩)

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收藏 | 浏览/下载：18/0 | 提交时间：2020/11/19

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The error analysis of automated biochemical analyzer (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Computing, Information and Control, ICCIC 2011, September 17, 2011 - September 18, 2011, Wuhan, China
Qinghai C.; Yihui W.; Haiwen L.; Peng H.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

In order to find out the relationships between the four error sources namely locating error optics system fluctuations sampling error and temperature fluctuations and the accuracy of the instrument we analyzed each relationship of them and found that the effect of locating error is so tiny that it can be ignored finally established the total error model and the model of the allowed noise of the optics system of the instrument. Analysis and the models may supply a reliable theory evidence for the improvement of the instrument and the designing of similar instruments. 2011 Springer-Verlag.

Control strategies and error compensation methods of high precision gyro stabilized platform (EI CONFERENCE) 会议论文 OAI收割
30th Chinese Control Conference, CCC 2011, July 22, 2011 - July 24, 2011, Yantai, China
Deng K.; Cong S.; Shen H.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

Based on the principle of gyroscope and the structure of gyro stabilized platform this paper gives the analysis and comparison of control strategies for stable platform included classical PID control and three kinds of advanced strategies: Fuzzy Control Sliding Mode Variable Structure Control and Active Disturbance Rejection Control. The compensation methods for stable platform's error are also discussed and evaluated based on the sources of error especially for the non-linear friction and gyro drift. The paper provides the reliable methods for recognizing and improving the accuracy of gyro stabilized platform from the control strategies and error compensations. 2011 Chinese Assoc of Automation.

The calibration of faint simulation star magnitude based on single photon count technique (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: Xu S.-Y.; Guo J.; Guo J.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

A calibration method of faint star magnitude of the star scene simulation device is proposed in this paper. In the research of simulation star magnitude luminometers and CCD devices are the general calibration devices which are used to measure the illumination intensity and calibrate its magnitude. But if the simulation magnitude is only sixth magnitude its illumination intensity is only 1.010-8 Lux. This illumination intensity level is the lowest illumination intensity that the commercial luminometer can detect. Hence the simulation star magnitude lower than six magnitude cannot be calibrated by luminoters. Likewise CCD devices also need an additive cooler in this case. When the single photon characteristic is presented due to the low luminosity of simulating light sources the simulation star magnitude can be calibrated by detecting its photon flux of radiation with the method of single photon count. In this paper the detection principle of single photon based on a compact designed PMT detecting of the radiation level of simulation star magnitude is advanced. Especially a spectrum match method is proved theoretically to be an effective means for selecting PMT photosensitive type. In the case of the detection object of the simulation star in visible wavelength a analysis indicates that the material of tri-alkali cathode materials its best choice after being compared the Signal-to-Noise of photon detector of several PMT photosensitive materials based on the different spectrum match ratio of different object light sources and different cathode materials. An experiment is employed to show the relationship of control voltage of PMT and its dark counter the relationship of the environment temperature of PMT and its dark counter which proves its only decades of CPS at room temperature. The so low dark counter avoids a bulky cooler and is convenient for installing it on the star scene simulation equipment. Finally in the experiment of calibrating the simulation star magnitudes the ability of its calibration is confirmed to reaches up to 12m meanwhile its calibration error is within 0.2m. 2009 SPIE.

Three-dimensional angle measurement based on auto-collimation and moire fringe (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
Cai S.; Liang S.; Qiao Y.-F.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

A method for small three-dimensional (3D) angle measurement based on auto-collimation and moire fringe is proposed and analyzed. A right-angle prism is used as the indicator of angle change. The inclined plane indicates the pitch and yaw angles and roll angle in indicated by the rib which is the intersection of two right-angle sides. Pitch and yaw angles measurement are implemented by auto-collimation based on reticule and roll angle measurement is measured based on moire fringe. Roll angle measurement is separated from pitch and yaw by using two light sources with different frequencies. Any small change of pitch and roll angles will induce the shift of the reticule image after reflecting by inclined plane. And any small roll angle will induce a change in moire fringe width that is generated by scale grating image which is reflected by the prism and index grating. The math model of this method is built up and error analysis is presented. The theoretical calculation results show that the proposed method is feasible and can achieve high accuracy. 2009 SPIE.

Design of a scene simulator in land-based aerospace lab with the man-made light source system based on quantum theory (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Devices and Integration II, November 12, 2007 - November 15, 2007, Beijing, China
作者: Fang W.; Yi W.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

The paper presents a method with the technique of combination filtering of spectrum and the technique of DSP control for the simulation and recognition of the spontaneously lightening object and stellar map in the universe. The magnitude and the spectrum of a star can be simulated in a wide dynamic range. We established the mathematical models of the Vega's visible light spectrum and luminous flux density. Tungsten-halogen lamp as a light source is used to fit the linear light of the spontaneously lightening object in the universe. Through the experiment it shows that the more sub-channels there are while filtering spectrum in the visible spectrum and the more degrees the variable neutral density filters and the narrow-band attenuators have more close to the actual spectrum the simulated spectrum is. It is proved that using the PID technique is beneficial to the output of the accurate and steady radiation from the light sources. The experiment shows that the using of this method can get perfect result in fitting and simulating the spectrum magnitude and the stellar map of the spontaneously lightening object . The analysis of the consistent result and the experimental error is also discussed in detail in this paper.

Analysis of a precise instrument for measuring reference level involute (EI CONFERENCE) 会议论文 OAI收割
Third International Symposium on Precision Mechanical Measurements, August 2, 2006 - August 6, 2006, Xinjiang, China
作者: Zhang Y.; Wang X.; Wang X.; Wang X.; Wang L.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

Reference level involute is used for evaluating other involutes but it is very difficult to measure reference level involute exactly. Nowadays the available methods for measuring precise involute include single base disc mode electronic generation mode and CNC three-coordinate mode. But measurement accuracy of the modes above is not suitable for reference level involute. A precise instrument for measuring reference level involute double base discs instrument is introduced. It is consistent with generation principle of the involute entirely. Besides having the advantages of single basic disc instrument the instrument can remove Abbe error caused by the stylus and has no pressure deforming. The instrument's structure is described. The main sources of measurement errors are analyzed and methods for compensation are presented. Finally uncertainty of the instrument is given which meets reference level involute test specification.

Effect of compliant interface on the curvature and stress of micron-size film-substrate composite structure 会议论文 OAI收割
2006 IEEE International Conference on Robotics and Biomimetics, ROBIO 2006, Kunming, China, December 17, 2006 - December 20, 2006
作者: Liu Y; Zhang Y(张吟)

收藏 | 浏览/下载：17/0 | 提交时间：2017/06/01

(abiotic and biotic) stress Curvature (sori) Error sources General (CO) interface layers Interfacial slips international conferences Micron sizes Stoney's formula stress states stress transfer