中国科学院机构知识库网格系统: 检索

Extracting and evaluating typical characteristics of rural revitalization using web text mining 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE, 2023, 页码: 25
作者: Fan, Kunkun; Li, Daichao; Wu, Haidong; Wang, Yingjie; Yu, Hu

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收藏 | 浏览/下载：32/0 | 提交时间：2023/12/22

Rural revitalization typical village characteristics web text mining characteristic extraction regional sustainable development

Coastal Zone Extraction Algorithm Based on Multilayer Depth Features for Hyperspectral Images 期刊论文 OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2023, 卷号: 61, 页码: 15
作者: Qiu, Shi; Ye, Huping; Liao, Xiaohan

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收藏 | 浏览/下载：37/0 | 提交时间：2023/11/29

Feature extraction Hyperspectral imaging Sea measurements Convolutional neural networks Three-dimensional displays Remote sensing Water quality 3-D convolutional neural network (CNN) depth characteristic hyperspectrum multilevel remote sensing squeeze and excitation network (SENet)

Ion Mobility Spectrometry Spectrum Reconstruction and Characteristic Peaks Extraction Algorithm Research 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 卷号: 40, 期号: 9, 页码: 2681-2685
作者: Zhang Gen-wei; Peng Si-long; Guo Teng-xiao; Yang Jie; Yang Jun-chao

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收藏 | 浏览/下载：63/0 | 提交时间：2021/01/07

Ion mobility spectrometry Spectrum reconstruction Characteristic peaks extraction Sparse representation Surrogate function algorithm

Geochemical characteristics of hydrocarbons in different states during oil-filling process of the Upper Triassic Chang 8 formation, Ordos basin, China 期刊论文 OAI收割
PETROLEUM SCIENCE AND TECHNOLOGY, 2018, 卷号: 36, 期号: 24, 页码: 2070-2076
作者: Guo, Ruiliang; Ma, Xiaofeng; Deng, Xiuqin; Song, Peng; Hao, Lewei

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收藏 | 浏览/下载：61/0 | 提交时间：2019/03/21

geochemical characteristic oil-filling process ordos basin reservoir rock sequential extraction

典型烟煤中游离态母体及烷基多环芳烃的含量和组成特征 期刊论文 OAI收割
地球化学, 2017, 卷号: 46, 期号: 4, 页码: 358-366
作者: 孙溶; 陈颖军; 韩勇; 田崇囯; 李军

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收藏 | 浏览/下载：34/0 | 提交时间：2020/07/07

PAHs extraction yield parent PAHs alkylated PAHs composition characteristic volatile matter content PAHs可抽提率母体多环芳烃烷基多环芳烃组成特征挥发分含量

Experimental analysis and improvement on camera calibration pattern 期刊论文 OAI收割
OPTICAL ENGINEERING, 2014, 卷号: 53, 期号: 1
作者: Li, Lulu; Zhao, Wenchuan; Wu, Fan; Liu, Yong; Gu, Wei

收藏 | 浏览/下载：43/0 | 提交时间：2015/07/10

calibration pattern characteristic point extraction fringe analysis Fourier transform phase shifting

adaptive scale smoothing for road redundancy region elimination 期刊论文 OAI收割
OPTICAL ENGINEERING, 2012, 卷号: 51, 期号: 6, 页码: -
Huang Zhijian; Zhang Jinfang; Wu Jiaze; Xu Fanjiang

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收藏 | 浏览/下载：32/0 | 提交时间：2013/09/17

road extraction skeleton analysis shape characteristic spectrum characteristic adaptive scale smoothing remote sensing image

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：56/0 | 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 OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
作者: Zhang Y.

收藏 | 浏览/下载：31/0 | 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.

The research on the automatic measurement of frequency characteristics of opto-electronic platform (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Liu H.; Liu H.; Chen J.; Liu H.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

A new frequency characteristic test method is proposed based on the digitization characteristics of optoelectronic platform servo system. First a digital processing controller is used to automatically test the entire process and tested data are uploaded to a PC through CAN-bus and then the tested data are transferred into accurate transfer function with the Levy method. Here we discuss the testing steps the data processing the extraction the Bode diagram plotting and the model identification in detail. The corresponding experiments are carried out and the results show that the method is simple with the features of high efficiency high precision and engineering feasibility. 2010 IEEE.