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A New Vegetation Index Infusing Visible-Infrared Spectral Absorption Feature for Natural Grassland FAPAR Retrieval 期刊论文
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 卷号: Vol.37 No.3, 页码: 859-864
作者:  Li, Z;  Guo, XD;  Gu, C;  Zhao, J
收藏  |  浏览/下载：2/0  |  提交时间：2019/02/25
Research on electrical characteristics of a new-style balancetransformer with three-phase three windings in electrified railway 会议论文
36th Chinese Control Conference, CCC 2017, Dalian, China, July 26, 2017 - July 28, 2017
作者:  Yifa, Sheng
收藏  |  浏览/下载：10/0  |  提交时间：2019/12/27
Theories and Practices of Remembering Nostalgia in New Urbanization 期刊论文
Journal of Landscape Research, 2015, 期号: 06, 页码: 53-56+58
作者:  LIU Peilin
收藏  |  浏览/下载：4/0  |  提交时间：2019/12/24
文天祥判词特点探析 期刊论文
http://epub.edu.cnki.net/grid2008/brief/detailj.aspx?filename=xsjl201109043&dbcode=CJFQ&dbname=CJFQ2011, 2012, 2012
郑英明
收藏  |  浏览/下载：3/0  |  提交时间：2017/06/19
网络英语学习的特征及其面临的问题 期刊论文
http://epub.edu.cnki.net/grid2008/brief/detailj.aspx?filename=jmdx200701018&dbcode=CJFQ&dbname=CJFQ2007, 2012, 2012
喻建平; 岑如意
收藏  |  浏览/下载：1/0  |  提交时间：2017/06/19
A new species of Chlorophorus Chevrolat (Coleoptera: Cerambycidae: Cerambycinae) from China with description of biology 期刊论文
ZOOTAXA, 2012, 期号: 3157, 页码: 54-60
作者:  Zong, Shi-Xiang[1];  Xie, Guang-Lin[2];  Wang, Wen-Kai[3];  Luo, Youqing[4];  Cao, Chuan-Jian[5]
收藏  |  浏览/下载：2/0  |  提交时间：2019/12/21
The new approach for infrared target tracking based on the particle filter algorithm (EI CONFERENCE) 会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
Sun H.; Han H.-X.
收藏  |  浏览/下载：50/0  |  提交时间：2013/03/25
Target tracking on the complex background in the infrared image sequence is hot research field. It provides the important basis in some fields such as video monitoring  precision  and video compression human-computer interaction. As a typical algorithms in the target tracking framework based on filtering and data connection  the particle filter with non-parameter estimation characteristic have ability to deal with nonlinear and non-Gaussian problems so it were widely used. There are various forms of density in the particle filter algorithm to make it valid when target occlusion occurred or recover tracking back from failure in track procedure  but in order to capture the change of the state space  it need a certain amount of particles to ensure samples is enough  and this number will increase in accompany with dimension and increase exponentially  this led to the increased amount of calculation is presented. In this paper particle filter algorithm and the Mean shift will be combined. Aiming at deficiencies of the classic mean shift Tracking algorithm easily trapped into local minima and Unable to get global optimal under the complex background. From these two perspectives that "adaptive multiple information fusion" and "with particle filter framework combining"  we expand the classic Mean Shift tracking framework.Based on the previous perspective  we proposed an improved Mean Shift infrared target tracking algorithm based on multiple information fusion. In the analysis of the infrared characteristics of target basis  Algorithm firstly extracted target gray and edge character and Proposed to guide the above two characteristics by the moving of the target information thus we can get new sports guide grayscale characteristics and motion guide border feature. Then proposes a new adaptive fusion mechanism  used these two new information adaptive to integrate into the Mean Shift tracking framework. Finally we designed a kind of automatic target model updating strategy to further improve tracking performance. Experimental results show that this algorithm can compensate shortcoming of the particle filter has too much computation  and can effectively overcome the fault that mean shift is easy to fall into local extreme value instead of global maximum value.Last because of the gray and fusion target motion information  this approach also inhibit interference from the background  ultimately improve the stability and the real-time of the target track. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE) 会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
Zhang B.; Zhang Z.-D.; Zhang S.-M.
收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25
Ground-based infrared imaging tracking system (GIITS) is of great importance for aerial target warning and guard. The operating range is one of the key performance specifications  on the other  which should be calculated  calculate the radiation power received on the detector in order to analysis whether the output signal meets the detection requirements or not  analyzed and studied during the whole GIITS design process. The operating range is mostly influenced by a few factors  without considering the effect of the background radiation. By improving of the traditional method  including atmospheric attenuation  a new operating range calculation model of the GIITS was established based on two requirements. One is that the image size of observed target should meet the requirement of the processor signal extraction. The number of the pixel occupied by target image should be more than 9. The other is that the signal noise ratio (SNR) of the GIITS should not be less than 5 to meet the requirements of the target detection probability and spatial frequency. The SNR calculation equation in form of energy is deduced and the radiation characteristic of the observed target and background are analyzed. When evaluate the operating range of the GIITS using the new method  the performance of GIITS and feature of target and background. This paper firstly makes analysis and summarization on the definite localizations of the traditional operating range equation of the GIITS. The localizations are mainly in two aspects. On one hand  we should successively calculate two operating range values according to two requirements mentioned above and choose the minimum value as the analytic result. In the end  the dispersion of the image and the effect of image dispersion are not considered in the traditional method  an evaluation of operating range for fighter aircraft is accomplished as an example. The influence factors in every aspect on operating range were explored by the calculated result. The new operating range calculation model provides the theoretical basis for the design and applications as well as the comprehensive evaluation of a GIITS. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
Three-sample rotation vector algorithm with angular rate input (EI CONFERENCE) 会议论文
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
Chu H.; Zhang Y.; Jia H.
收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25
In order to research the attitude algorithm with angular rate input under the conical motion  a optimal threesample rotation vector algorithm based on single-step Newton backward interpolation is proposed. Using the principle of limited rigid body rotation and the characteristic of angular rate input  three-sample rotation vector algorithm is derivated. To minimum attitude errors  three-sample rotation vector algorithm is optimized. Three angular rate extraction methods of singlestep entire sample recursion  multi-step entire sample and singlestep Newton backward interpolation are proposed. Under the condition of conical motion with semi-cone angle 3 and angular frequency 2rad/s  simulation is done. The simulation results show that single-step Newton backward interpolation is superior to the other two methods  and its maximum error peak is 0.01  error drift rate is 0.036/h. Experiments in three-axis flying turntable with the same parameters are carried out  and the results show that error drift rates of three-channels are less than those of traditional quaternion  which are 13.53%  12.08% and 23.68% lower respectively. It also verified that the new algorithm can perform a high accuracy under the conical motion. 2011 IEEE.  
Mathematical model and equivalent circuit for three-phase three-limb transformer based on magnetic circuit characteristics 期刊论文
Dianli Xitong Zidonghua/Automation of Electric Power Systems, 2011, 卷号: 35, 期号: [db:dc_citation_issue], 页码: 52-57
作者:  Suonan, Jiale;  Xu, Liqiang;  Jiao, Zaibin;  Du, Bin
收藏  |  浏览/下载：2/0  |  提交时间：2019/12/10

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