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浏览/检索结果: 共7条，第1-7条 帮助 限定条件 内容类型：会议论文    专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Design and manufacture of micro interference system in spatial modulation fourier transform spectrometer 会议论文 14th Annual Conference and the 3rd International Conference of the Chinese Society of Micro-Nano Technology, CSMNT 2012, November 4, 2012 - November 7, 2012, Hangzhou, China Lv J.; Liang J.; Liang Z.; Qin Y.; Tian C.; Wang W. 收藏  |  浏览/下载：18/0  |  提交时间：2014/05/15 Mechanism Design of Continuous infrared Lens 会议论文 Conference Location, 2013 Su Y. Q.; Zhang J. X.; Lv T. Y.; Yang F.; Wang F. G. 收藏  |  浏览/下载：17/0  |  提交时间：2014/05/22 Simulation and experiment of the static FTIR based on micro multi-step mirrors (EI CONFERENCE) 会议论文 International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China Liang J.; Liang Z.-Z.; Lv J.-G.; Fu J.-G.; Zheng Y.; Feng C.; Wang W.-B.; Zhu W.-B.; Yao J.-S.; Zhang J. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 In recent years  Fourier transform spectrometer (FTS) with small size and low mass is required in many applications with growing need for real-time and small platform spectral detection. In this paper  a micro Fourier transform infrared spectrometer (FTIR) based on spatial modulation mode was designed. This spectrometer has the advantages of high stability and simplified configuration. It also promises optical path differences (OPD) with high precision  as MOEMS technology is used in manufacturing the key components. The simulation and the experiments with regard to this FTIR configuration have been done. Firstly  the diffraction effect of the micro multi-step mirrors (MMSMs) is studied. We discuss the influence to the reversed spectrum by different mirror widths and different diffraction distances. Secondly  we simulate and analyze the influence of the source solid angle to the spectral resolution. Thirdly  we set up the theoretical model of the collimation error which is mainly from the defocus of the optical system and analyze the result caused by the collimation error. Fourthly  a new discrete Fourier transform arithmetic using least-squares cosines progression (LSCP) is proposed which can reconstruct the spectrum with nonuniform sampled signals. Finally  the MMSMs are fabricated used the MOEMS technology and the structural parameters are tested. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).   Research on the identification for a nonlinear system (EI CONFERENCE) 会议论文 International Conference on Optical, Electronic Materials and Applications 2011, OEMA 2011, March 4, 2011 - March 6, 2011, Chongqing, China Lv S.; Liu J.; Jia P. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 The characteristic of the drift error of inertial platform is a high-order nonlinear dynamic system  using the neural networks' abilities of universal approximation of differentiable trajectory and capturing system dynamic information  this paper presents the drift error identifying project of inertial platform based on Elman networks structure. First  the drift error model of inertial platform is established  after selecting the input and output for network  momentum and alterable speed algorithm is used to speed up the network convergence. On the basis of the algorithm  the extended nonlinear node function in the hidden network does not only improve the learning speed of network  but also satisfies the need of accuracy on system identification. Through the drift error data measured on inertial platform  the training result shows that the scheme achieves satisfied identification results. (2011) Trans Tech Publications.   Research on the Identification for a Nonlinear System 会议论文 2011 Lv S. L.; Liu J. G.; Jia P. 收藏  |  浏览/下载：4/0  |  提交时间：2013/03/28 Study on medical X-ray coherent scatter imaging and processing based digital flat detector (EI CONFERENCE) 会议论文 3rd International Conference on BioMedical Engineering and Informatics, BMEI 2010, October 16, 2010 - October 18, 2010, Yantai, China Liu J.; Lv Y.; Li B.; Liu T.; Hu B.; Zhao J. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 It is introduced a novel imaging technique for medical diagnostic X-ray coherent scatter in this paper. A set of experimental equipment for X-ray coherent scatter imaging was set up with X-ray digital flat detector and medical diagnostic X-ray source. According to this equipment  the scatter images obtained are made of some circles with the same center. It is vital to calculate the energy template to classify the different samples. It is difficult to separate them using the traditional threshold method due to noise and overlapped shadow. In this paper  the image was transformed a binary image by using K-Means algorithm and Mathematical Morphology Methods. The effective region was extracted from the binary image inside the orthogonal energy projection space  then to calculate the centroid of rings. Consequently the curve of the energy distribution was built. The experiment results show that our method is reasonable and feasible. The technique will have wide foreground of application .Besides the imaging of human bone content  it can be used for various imaging of tissue and organs in biology. 2010 IEEE.   Research on Automatic Multispectral Images Synthesis of Space Camera 会议论文 2010 Wu X. X.; Liu J. G.; Zhou H. D.; Kong D. Z.; Lv S. L. 收藏  |  浏览/下载：7/0  |  提交时间：2013/03/28