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An efficient blue phosphor Ba2Lu5B5O17 Ce3+ stabilized by La2O3 Photoluminescence properties and potential use in white LEDs 期刊论文
Dyes and Pigments, 2018, 卷号: 154, 页码: 121-127
作者:  Xiao, Y.;  Hao, Z. D.;  Zhang, L. L.;  Wu, H.;  Pan, G. H.
收藏  |  浏览/下载：7/0  |  提交时间：2019/09/17
Charge Transfer Effects on Resonance-Enhanced Raman Scattering for Molecules Adsorbed on Single-Crystalline Perovskite 期刊论文
Acs Photonics, 2018, 卷号: 5, 期号: 4, 页码: 1619-1627
作者:  Yu, Z.;  Yu, W. L.;  Xing, J.;  Ganeev, R. A.;  Xin, W.
收藏  |  浏览/下载：5/0  |  提交时间：2019/09/17
Observation of Gap Opening in 1T ' Phase MoS2 Nanocrystals 期刊论文
Nano Letters, 2018, 卷号: 18, 期号: 8, 页码: 5085-5090
作者:  Xu, H.;  Han, D.;  Bao, Y.;  Cheng, F.;  Ding, Z. J.
收藏  |  浏览/下载：1/0  |  提交时间：2019/09/17
Novel single-transverse-mode control of VCSELs with dielectric mode filter 期刊论文
Chinese Physics B, 2018, 卷号: 27, 期号: 7, 页码: 4
作者:  Xiang, L.;  Zhang, X.;  Zhang, J. W.;  Huang, Y. W.;  Ning, Y. Q.
收藏  |  浏览/下载：3/0  |  提交时间：2019/09/17
Observation of Gap Opening in 1T ' Phase MoS2 Nanocrystals 期刊论文
Nano Letters, 2018, 卷号: 18, 期号: 8, 页码: 5085-5090
作者:  Xu, H.;  Han, D.;  Bao, Y.;  Cheng, F.;  Ding, Z. J.
收藏  |  浏览/下载：5/0  |  提交时间：2019/09/17
Multi-resonance peaks fiber Bragg gratings based on largely-chirped structure 期刊论文
Optics Communications, 2018, 卷号: 412, 页码: 150-154
作者:  Chen, C.;  Zhang, X. Y.;  Wei, W. H.;  Chen, Y. Y.;  Qin, L.
收藏  |  浏览/下载：5/0  |  提交时间：2019/09/17
The aircraft autopilot design of parameters changing in a wide range (EI CONFERENCE) 会议论文
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Zhen D.; Yue Z.
收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25
Autopilot is an important part of aircraft  Under the action of the disturbance torque  for the flight parameters of aircraft Changing in a wide range  the range was about 16km  on the basic of analyzing the typical trajectory  the max height was about 5100m  the trajectory of feature points were selected  the deviation of lateral was about 12m  taking pitch control loop for example  the maximum angle of attack was about 3.6  a sub- PID autopilot was designed using classical control theory  the maximum elevator deflection was less than 5  using single-mode Transient suppression method  the maximum aileron deflection was less than 2  the overload due to control surface transition deflection was avoided when control parameters changing  the maximum roll was less than 5  the verification was done by non-linear simulation. The result showed that: the phase margin of autopilot was greater than 30  the response of overload can accurately track the given overload instruction. An autopilot design method of aircraft of parameter changes in a wide range was provided. 2011 IEEE.  the bandwidth was more than 14rad / s  the settling time was less than 0.7s  the maximum overshoot was 23.3%  
Design and image restoration research of a cubic-phase-plate system (EI CONFERENCE) 会议论文
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China
Zhang X.; Zhang X.; Shi G.; Zhang J.; He F.
收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25
Wave-front coding technology is a novel jointly optical and digital imaging technology which can greatly extend the depth of focus of optical systems. The image restoration process is an important part of wave-front coding technology. Using wave-front coding makes the modulation transfer function(MTF) values of the optical systems change little over a range of several times the depth of focus  which means the system MTF is quite insensitive to defocus  and there is no zero in the passband. So we can design a single filter for the restoration of images in different defocus positions. However  it's hard to avoid noise during image acquisition and transmission processes. These noises will be amplified in the image restoration  especially in the high frequency part when the MTF drop is relatively low. The restoration process significantly reduces the system signal to noise ratio this way. Aimed at the problem of noise amplification  a new algorithm was proposed which incorporated wavelet denoising into the iterative steps of Lucy-Richardson algorithm. Better restoration results were obtained through the new algorithm  effectively solving the noise amplification problem of original LR algorithm. Two sets of identical triplet imaging systems were designed  in one of which the cubic-phase-plate was added. Imaging experiments of the manufactured systems were carried  and the images of a traditional system and a wave-front coded system before and after decoding were compared. The results show that the designed wave-front coded system can extend the depth of focus by 40 times compared with the traditional system while maintaining the light flux and the image plane resolution. 2010 Copyright SPIE - The International Society for Optical Engineering.  
Graph fitting test method for the interpolation error of Moire fringe (EI CONFERENCE) 会议论文
9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China
Wan Q.; Sun Y.; She R.; Liang L.; Lu X.; Du Y.
收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25
In order to realize the fast test for the interpolation error  the graph fitting test method for the interpolation error of Moire fringe is put forward in this paper. Firstly  the triangular wave Moire fringe photoelectric signal of the encoder whose phase difference is 90 are sampled to get the Lissajous graph of the two signals. Secondly  the single wave represented by the founded subsection function is used to fit the practical Moire fringe Lissajous graph. Then  the fitting result is tested to verify whether it satisfies the accuracy requirement. Lastly  the founded subsection function instead of the practical wave function is used to calculate the interpolation error. Using the graph fitting method to sample the Moire fringe single of 15-bits photoelectric encoder to get the interpolation error curve  the tested maximum interpolation error is 70" and the minimum error is - 69". Comparing with the interpolation error which is received from traditional test method  the change trend of the interpolation error curve is similar  and peak-peak value is almost equality. The results of experiment indicate that: the equipment is convenient and the examination method is efficient and feasible. The measure speed is fast and the manifestation result is intuitionistic. The system can be used in the working field. The method can avoid the speed influence and realize the dynamic interpolation error measure  which is significant for the research of encoder's dynamic accuracy characteristics. 2009 IEEE.  
The analysis and design of low velocity estimation based on observer (EI CONFERENCE) 会议论文
2009 IEEE International Conference on Automation and Logistics, ICAL 2009, August 5, 2009 - August 7, 2009, Shenyang, China
Song Y.; Gao H.; Zhang S.; Tian Y.; Wang D.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
Low velocity servo system needs precision velocity estimation. An observer for low velocity estimation was proposed in this paper. First  the source of low velocity estimation errors and the shortcomings of the single period difference were analyzed. The relationship between the estimation accuracy and estimator's frequency characteristics was concluded. Then  the structure of the observer was proposed. Frequency characteristics were used to design the compensator which can stabilize the observer. The stability of the observer was also discussed. At last  the observer's estimation accuracy was evaluated through a quantitative comparison. The results of simulation and experiment have shown that the quantized error in velocity estimation decreases dramatically when a velocity observer is used. Compared with some commonly-used estimators  the phase lag accompanying the observer is much less. 2009 IEEE.  

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