中国科学院机构知识库网格系统: 检索

Computational Experiments for Complex Social System Part II: The Evaluation of Computational Models 期刊论文 OAI收割
IEEE TRANSACTIONS ON COMPUTATIONAL SOCIAL SYSTEMS, 2021, 页码: 13
作者: Lu, Min; Chen, Shizhan; Xue, Xiao; Wang, Xiao; Zhang, Yufang

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收藏 | 浏览/下载：34/0 | 提交时间：2022/01/27

Capability maturity model Computational modeling Biological system modeling Epidemics Analytical models Complex systems COVID-19 Agent-based modeling computational experiments computational models COVID-19 model evaluation

BER Analysis of Coherent Free-Space Optical Communication Systems with a Focal-Plane-Based Wavefront Sensor 期刊论文 OAI收割
Journal of the Korean Physical Society, 2018, 卷号: 72, 期号: 5, 页码: 555-560
作者: Cao, J. T.; Zhao, X. H.; Liu, W.; Gu, H. J.

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收藏 | 浏览/下载：14/0 | 提交时间：2019/09/17

FSOC system Atmospheric turbulence Focal-plane-based wavefront sensor BER adaptive optics atmospheric compensation performance evaluation efficiency analysis model algorithm lidar Physics

Tracking error modeling of the theodolite based on GRNN method (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2011, December 11, 2011 - December 13, 2011, Taichung, Taiwan
作者: Li M.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

To meet the requirement of high tracking accuracy as well as develop more reasonable evaluation method in this paper the General Regression Neural Network (GRNN) has been applied to build the tracking error model of the theodolite. First we analyze the nonlinear factors in the theodolite. Second we discuss the principle of GRNN including its structure the function as well as its priors. Third we build the tracking error model based on GRNN and verify the model through the different parameters. The result indicated that the network model based on GRNN has high accuracy and good generalization ability. It could instead the real system to a certain extent. The research in this paper has important value to the engineering practice.

Three-Dimensional Deformable-Model-Based Localization and Recognition of Road Vehicles 期刊论文 OAI收割
IEEE TRANSACTIONS ON IMAGE PROCESSING, 2012, 卷号: 21, 期号: 1, 页码: 1-13
作者: Zhang, Zhaoxiang; Tan, Tieniu; Huang, Kaiqi; Wang, Yunhong; Kaiqi Huang

收藏 | 浏览/下载：28/0 | 提交时间：2015/08/12

Evolutionary computing fitness evaluation model-based vision vehicle localization vehicle recognition visual surveillance

Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者: Zhang Z.-D.

收藏 | 浏览/下载：48/0 | 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).

Evaluation system of photovoltaic disturbance effect based on simulations (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
作者: Li Y.; Lu M.; Guo L.-H.; Li Y.; Li Y.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

The evaluation system is investigated for the disturbing effect of optical countermeasure device to photoelectrical guided weapon in this paper. The general optical countermeasure simulation model is established by using photoelectrical countermeasure simulation test to conduct the estimation of countermeasure effect. The target-missing quantity of guided weapon and guided precision is designated as evaluating index. Whether the disturbing is valid or not is based on Whether the target-missing quantity is more than 3 times of normal guided precision without disturbance or not. 2011 IEEE.

A combat effectiveness evaluation model based on interval number and grey decision making (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
Li H.; Guo L.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

During the combat effectiveness evaluation the evaluation values exist the precise number interval number and the language fuzzy number at the same time. For this question this paper introduces the interval number and grey decision making principle and bring forward a combat effectiveness evaluation model based on the interval number and grey decision making. Combined with the case to analyze this paper verifies the reasonableness of the model. The results show that this model can truly reflect the comprehensive evaluation value of the weapon equipment combat effectiveness. 2011 IEEE.

3D Model Based Vehicle Tracking Using Gradient Based Fitness Evaluation under Particle Filter Framework 会议论文 OAI收割
Istanbul, Turkey, 23-26 August 2010
作者: Zhaoxiang Zhang; Kaiqi Huang; Tieniu Tan; Yunhong Wang

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收藏 | 浏览/下载：12/0 | 提交时间：2017/02/09

Particle Filter Model Based Tracking Fitness Evaluation

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：20/0 | 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.

Assessment of surface roughness by use of soft x-ray scattering (EI CONFERENCE) 会议论文 OAI收割
Soft X-Ray Lasers and Applications VIII, August 4, 2009 - August 6, 2009, San Diego, CA, United states
Yan-li M.; Yong-gang W.; Shu-yan C.; Bo C.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

A soft x-ray reflectometer with laser produced plasma source has been designed which can work from wavelength 8nm to 30 nm and has high performance. Using the soft x-ray reflectometer above the scattering light distribution of silicon and zerodur mirrors which have super-smooth surfaces could be measured at different incidence angle and different wavelength. The measurement when the incidence angle is 2 degree and the wavelength is 1 lnm has been given in this paper. A surface scattering theory of soft x-ray grazing incidence optics based on linear system theory and an inverse scattering mathematical model is introduced. The vector scattering theory of soft x-ray scattering also is stated in detail. The scattering data are analyzed by both the methods above respectively to give information about the surface profiles. On the other hand both the two samples are measured by WYKO surface profiler and the surface roughness of the silicon and zerodur mirror is 1.3 nm and 1.5nm respectively. The calculated results are in quantitative agreement with those measured by WYKO surface profiler which indicates that soft x-ray scattering is a very useful tool for the evaluation of highly polished surfaces. But there still some difference among the results of different theory and WYKO and the possible reasons of such difference have been discussed in detail. 2009 SPIE.