中国科学院机构知识库网格系统: 检索

A tracking method with structural local mean and local standard deviation appearance model 会议论文 OAI收割
全国模式识别学术会议(6th Chinese Conference on Pattern Recognition), 湖南长沙, 2014年11月17-19
作者: Yang DW(杨大为); Cong Y(丛杨); Tang YD(唐延东); Li, Yulian

收藏 | 浏览/下载：17/0 | 提交时间：2014/12/29

object tracking local mean local standard deviation structural appearance model the Native Bayesian

A new model and improvement on test methods of the readout noise in the CCD camera 会议论文 OAI收割
7th international symposium on precision engineering measurements and instrumentation, lijiang, china, august 7, 2011 - august 11, 2011
YangZuoting; RuanPing; GeWei; WangHong

收藏 | 浏览/下载：20/0 | 提交时间：2012/07/10

CCD readout noise standard section model image processing

Modular aircraft simulation platform based on simulink (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Mechatronics and Automation, ICMA 2010, August 4, 2010 - August 7, 2010, Xi'an, China
Chen C.-Q.; Ji Y.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

Aircraft simulation platform is the most important supporting technology in the aircraft development process. This simulation platform can be used for validating the design of subsystem and also it provides the necessary data for the Aircraft design. Wind has great impact on the flight parameter. In order to accurately simulate the wind model and calculate the flight parameters a simulation modeling method for flight parameter simulation platform under wind field environment is established. Firstly the various sub-systems which affecting flight parameters are analyzed some mathematical models of the flight parameter simulation platform is established. Secondly the atmospheric wind field is studied to analyze the impact on its trajectory. Then the model is built in the Simulink toolbox in the Matlab which is based on the principles of hierarchy and modularity using C MEX S-function for the complex kinetic equations. Finally when the models have been established encapsulating models for several subsystem and assembling them for the Aircraft simulation platform based on the unified interface. The simulation tests (including the performance test of a certain gliding Aircraft the wind influence test of a certain uncontrolled aircraft) prove the simulation capability of the platform and its calculating step can reach 1 ms. Comparing simulation with field test data of a certain uncontrolled aircraft it shows that the relative deviation of range is 0.47% the relative deviation of maximal altitude is 2.1%. Taking relevant standards as a reference standard it is demonstrated the platform is reliable meets the engineering accuracy requirements. 2010 IEEE.

Application of adaptive UKF in initial alignment of MINS/GPS integrated navigation system (EI CONFERENCE) 会议论文 OAI收割
2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China
作者: Gao Q.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

In order to overcome the shortcomings of standard unscented Kalman filter (UKF) which are obviously influenced by the error of initial value and the model error of system adaptive UKF which is based on the adaptive principle is applied in initial alignment of the MINS/GPS integrated navigation system. Coarse alignment cannot be done by micro inertial measurement unit (MIMU) itself because of its low precision the method of using magnetometer to assist it with coarse alignment is presented. Simulation results show that the adaptive UKF can overcome the influences of initial values error and inaccurate system model and improve the convergence speed and alignment accuracy effectively. 2010 IEEE.

Dynamic variation of economic difference in Tarim Basin, Xinjiang, China 会议论文 OAI收割
2010 International Conference on Challenges in Environmental Science and Computer Engineering, Wuhan, China, 2010
Sun; Changlong1; 2; Du; Hongru1; Xu; Xiaoliang1; Ma; Wenwen1; Chen; Zhongsheng1

收藏 | 浏览/下载：21/0 | 提交时间：2011/08/23

Environmental engineering - Regional planning - Regression analysis - Statistics - Characteristics of dynamics - Development rate - Dynamic variations - Economical difference - Per capita - Regression model - Spatial structure - Standard deviation - Tarim Basin - Xinjiang

Configurable integrated maintenance system based on digital production model 会议论文 OAI收割
22nd Chinese Control and Decision Conference, Xuzhou, China, May 26-28, 2010
作者: Li P(里鹏); Sun YG(孙永刚); Shi HB(史海波); Shang WL(尚文利)

收藏 | 浏览/下载：16/0 | 提交时间：2012/06/06

SP95 standard plant model preventive maintenance condition monitoring

Chinese Human Genetic Resources Sharing Infrastructure-Services and Technical Architecture 会议论文 OAI收割
作者: Ma X.

收藏 | 浏览/下载：34/0 | 提交时间：2012/06/30

human genetic resources sharing infrastructure reference model data standard data mining database

System identification of tracking error and evaluation of tracking performance using BP neural network (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, June 17, 2009 - June 19, 2009, Beijing, China
Zhang N.; Shen X.-H.

收藏 | 浏览/下载：12/0 | 提交时间：2013/03/25

A novel approach for evaluating the tracking performance of optoelectronic theodolite is proposed. First an equivalent mathematic model of tracking error is established. Then the equivalent sine signal is inputted to the equivalent model and the outputs are sampled. The results of evaluating the tracking performance are obtained based on the statistical calculation of output produced by equivalent model. Equivalent model using the BP (Backprogration) neural network structure is identified. The training method of BP neural network adopts the LM (Levenberg-Marquardt) algorithm for the sake of speeding up training process. The BP neural network is trained and tested by using the training and testing samples gotten from the simulation model of optoelectronic theodolite tracking system under MATLAB/SIMULINK. The estimate errors of equivalent model including average error maximum error and standard error are 2.5872e-0060 2.8 and 1.9. The results show that the equivalent model identified based on BP neural network meets the needs of evaluating the tracking performance of optoelectronic theodolite. The accurate evaluation of tracking performance is achieved. 2009 SPIE.

Orientation error analysis of alt-alt photoelectric telescope (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Wu X.-X.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

In order to ascertain the effects of main errors of alt-alt photoelectric telescope on measurement accuracy orientation error is analyzed.For analyzing optical mechanical and electrical errors from measured target to telescope picture we construct 7 coordinates such as:the earth's core coordinate alt-alt coordinate etc. carry through 21 times coordinate transformation form measuring equation with 26 variables. and we utilize Monte Carlo method to calculate the orientation error analyze the effects of errors upon pointing. The result indicates that the measuring error standard deviation of alt-alt telescope is minimum value about 10? at the zenith zone. and the deviation increases with the rotation angles of longitude and latitude axes. The model and the method not only can analyze and synthesize the main errors but also provide a reference to the whole design. 2009 SPIE.

Modeling diffractive optical elements in hybrid systems with the effect of the material dispersion (EI CONFERENCE) 会议论文 OAI收割
Current Developments in Lens Design and Optical Engineering IX, August 11, 2008 - August 12, 2008, San Diego, CA, United states
作者: Zhang H.; Liu H.; Liu H.; Liu H.; Zhang H.

收藏 | 浏览/下载：7/0 | 提交时间：2013/03/25

The diffractive optical element (DOE) is always modeled as an ideal pure diffractive element which neglects the refractive dispersion of the element's material. In this paper a new model of the diffractive optical element is proposed in which the effect of the refractive dispersion of the DOE's material is considered. The new model is explained and compared with standard diffraction-order expansion with the help of a hybrid system example. The analytical results show that the new model has an important meaning for the exact analysis of the hybrid refractive-diffractive optical system. 2008 Copyright SPIE - The International Society for Optical Engineering.