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First-principles study of ferromagnetism in Pd-doped and Pd- Cu-codoped BN 会议论文
Hangzhou, China, May 20, 2016 - May 23, 2016
作者:  Wang, Q.;  Wang, S.;  Dai, J.F.;  Li, W.X.
收藏  |  浏览/下载：8/0  |  提交时间：2020/11/15
Study of PIN electrical modulation structure based on SiGe-OI material 会议论文
International Conference on Photonics and Optical Engineering (icPOE), Xian, PEOPLES R CHINA, 2014-10-13
作者:  Feng, Song;  Jiang, Ren-Ke;  Gao, Yong
收藏  |  浏览/下载：5/0  |  提交时间：2019/12/20
LED display panel grayscale modulation based on computer calculation (EI CONFERENCE) 会议论文
2012 International Applied Mechanics, Mechatronics Automation Symposium, IAMMAS 2012, September 7, 2012 - September 9, 2012, Shenyang, Liaoning, China
Wang R.-g.; Chang F.
收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25
In order to improve the method of the LED display panel grayscale modulation a method based on computer calculation is proposed. First the development history and trends of the LED display panel are introduced. Second present the structure of the LED display panel and the existed modulation method. Simultaneously point out the ground for shortcomings of the existed method. Third describe the principle modulation method based on computer calculation detail from two steps which are the data signal transformation and the grayscale modulation. Forth describe the realization steps of this method in accordance with the third step. Finally this method is supplied in a LED display panel whose resolution is 320240. Experimental results show that this method is able to increase the grayscale from 14-bit to 16-bit and can enhance the display result of the LED display panel significantly. (2012) Trans Tech Publications Switzerland.  
The application of diagnostic equipment in the Tokamak fusion reaction (EI CONFERENCE) 会议论文
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：12/0  |  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  
Applications of phase masks in volume holographic data storage system and correlators 会议论文
Proceedings of the SPIE - The International Society for Optical Engineering, Quantum Optics, Optical Data Storage, and Advanced Microlithography, Beijing, China, INSPEC
Wei Ren; Qiang Ma; Liangcai Cao; Qingsheng He; Guofan Jin
收藏  |  浏览/下载：2/0
A method of CAE for calculating the temperature tolerance of telescope (EI CONFERENCE) 会议论文
2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China
Xie S.; Zhu X.; Li Q.; Chen C.
收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25
In order to obtain high quality pictures  the thermal design is necessary for the space telescope. The designed temperature scope should meet to the permissible temperature tolerance of the telescope. A method for calculating the permissible temperature tolerance of the telescope is studied. The calculating temperature tolerance will be targeted for space thermal environment adaptive structure design and thermal design. A method for describing the temperature fields of the telescope is introduced. The descriptive temperature fields are able to include every temperature states that the telescope endured on orbit. When the MTF (Modulation Transfer Function) just meet to the optical indicator  the ultimate temperature tolerance of the space telescope is obtained  that is  the aim temperature scope for the thermal design is obtained. 2009 IEEE.  
Optical system of large relative aperture and wide field using aspheric corrector for detecting (EI CONFERENCE) 会议论文
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
Ming M.; Wang J.; Zhang J.
收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25
The magnitude requirement of space target detecting determines that the image of detecting telescope should have several performances: small spots  the wider field of view  small 80% encircled energy diameter and good MTF(Modulation transfer function). So the aperture and field of view of optical system have some demands accordingly. The larger aperture  the more extensive range which the telescope searches. Now most of ground telescopes whose apertures are from 500mm to 1000mm is on-axis optical system  the more energy that telescope collects and higher magnitude the telescope detects  so wide field of view becomes the most importance problem. To obtain large relative aperture and wide field of view  the paper introduces a catadioptric telescope with small aperture aspheric refractive corrector  whose conic surface will be used to remove the aberrations due to large relative aperture and wide field of view. As to the optical system  there is only one aspheric refractive corrector  and it is relatively easy for manufacturing because of its concave figure and normal material. The paper gives the example  and optimizes this optical system with ZEMAX program. And then the paper provides a specific analysis program for testing the aspheric refractive corrector. The aperture of this optical system is 750mm  and its relative aperture is 0.82  and the field of view is 3.6 diameter(diagonal). Its structure is simple and the image quality is also very good. 2009 SPIE.  
Study and design of three-phase voltage-source PWM rectifier in movable power station 会议论文
Guangzhou, China, August 4, 2008 - August 5, 2008
作者:  Wang, Xinggui;  Li, Xiaoying
收藏  |  浏览/下载：17/0  |  提交时间：2020/11/15
Low drive-voltage and high-bandwidth electro-optic modulators based on BaTiO3 thin-film waveguides (EI CONFERENCE) 会议论文
Science and Technology of Dielectrics for Active and Passive Photonic Devices - 210th Electrochemical Society Meeting, October 29, 2006 - November 3, 2006, Cancun, Mexico
Sun D. G.; Fu X. H.; Liu Z. F.; Ho S. T.; Wessels B. W.
收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25
We investigated electro-optic modulator structures to target low drive voltage  high-speed modulation  and small device size with c-axis grown BaTiO3/MgO ferro-electric thin films. In this study  the calculations are focused on the ideal thin film with a quadratic relation between the half-wave drive voltage V and the interaction length L in the electro-optic modulation case we obtained in previous work. With the quadratic electro-optic modulating relation and the optimal rib waveguide structure of BaTiO3/MgO thin films  the frequency-voltage-size performances for 2.5GHz  10GHz  40GHz  and 100GHz modulation bandwidths have been obtained under half-wave drive voltages of 0.8V  1.6V  3.0V and 4.8V  respectively  for the ideal film with r51=730 pm/V at 1550nm wavelength  where both the phase velocity matching condition and the conductor induced microwave attenuation are considered. The required device lengths to achieve these four typical values of modulation bandwidth are 3.3 mm  0.8 mm  0.4 mm and 0.2 mm  respectively. With the c-axis grown BaTiO3/MgO crystal thin films and the quadratic electro-optic modulating relation  an electro-optic coefficient of reff=180 pm/V for the c-axis grown BaTiO3/MgO ferro-electric thin films was measured  which is relatively far from the ideal value of r51=560 pm/V. copyright The Electrochemical Society.  
A direct power control scheme for three-phase PWM rectifiers based on sliding-mode variable structure control theory (EI收录) 会议论文
Proceedings of the International Conference on Power Electronics and Drive Systems, Taipei, Taiwan, January 2, 2009 - January 5, 2009
作者:  Wang, Wanwei[1];  Yin, Huajie[1];  Guan, Lin[1]
收藏  |  浏览/下载：3/0  |  提交时间：2019/04/17

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