检索结果-南通市图书馆

维普期刊数据库

A Novel Algorithm of Water Region Detection in SAR Image Based on Bag of Visual Words and Local Pattern Histogram

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2016年第5期25卷 974-979页

作者： FENG Jing CHEN Liang WEI Hang bi fukun CHEN He School of Information and Electronics Beijing Institute of Technology College of Information Engineering North China University of Technology

Water region detection based on SAR images is a difficult problem for its computing *** paper proposes a novel water region detection method in SAR image of complex scenery. The algorithm takes advantages of Bag of visual words(BOV) to precisely describe the homogeneous region in complex scenery. Local pattern histogram(LPH) and single-class Support vector machine(SVM) are adopted to determine the edge information of water region precisely. The feature extraction is calculated block by block, which reduces computing workload and interference from noise. The experiments based on SAR images of real complex scenery show that the proposed method achieves higher accuracy and robustness.

关键词： Synthetic aperture radar(SAR) Water region detection Bag of visual words(BOV) Local pattern histogram(LPH) Single-class support vector machine(SVM)

Harmful Intrusion Detection Algorithm of Optical Fiber Pre-Warning System Based on Correlation of Orthogonal Polarization Signals

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Photonic Sensors 2017年第3期7卷 226-233页

作者： fukun bi Chong FENG Hongquan QU Tong ZHENG Chonglei WANG School of Electrical and Information Engineering North China University of Technology Beijing 100144 China Beijing Institute of Technology Department of Information and Electronic Beijing 100081 China

At present, advanced researches of optical fiber intrusion measurement are based on the constant false alarm rate （CFAR） algorithm. Although these conventional methods overcome the interference of non-stationary random signals, there are still a large number of false alarms in practical applications. This is because there is no specific study on orthogonal polarization signals of false alarm and intrusion. In order to further reduce false alarms, we analyze the correlation of optical fiber signals using birefringence of single-mode fiber. This paper proposes the harmful intrusion detection algorithm based on the correlation of two orthogonal polarization signals. The proposed method uses correlation coefficient to distinguish false alarms and intrusions, which can decrease false alarms. Experiments on real data, which are collected from the practical environment, demonstrate that the difference in correlation is a robust feature. Furthermore, the results show that the proposed algorithm can reduce the false alarms and ensure the detection performance when it is used in optical fiber pre-warning system （OFPS）.

关键词： Optical fiber birefringence orthogonal polarization signals correlation

A coarse-to-fine image registration method based on visual attention model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2014年第12期57卷 122-131页

作者： FENG Jing MA Long bi fukun ZHANG XueJing CHEN He School of Information and Electronics Beijing Institute of Technology College of Information Engineering North China University of Technology College of Information Technology Beijing Union University

Image registration is fundamental and crucial to remote *** getting highly accurate registration performance automatically and fast for large-field images consistently is a *** a work around to this problem,we propose a new image registration concept based on visual attention in this *** concept employs the advantages of feature-based or area-based methods to improve the precision and efficiency of image *** key concept of proposed integrated scheme is to make optimum use of the highly prominent details in the full scene by means of visual attention computational *** testify the validation,comparisons with other classical methods are carried out on real-world *** experimental results show that the proposed method can effectively perform on multi-view/multi-temporal remote sensing images with outstanding precision and time saving performance.

关键词： remote sensing image registration visual attention similarity measure partial correlation coarseto-fine process

Capturing and tracking of building area based on structure saliency in airborne remote sensing video

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2015年第4期58卷 176-178页

作者： FENG Jing bi fukun CHEN Liang ZHANG FeiFei CHEN He School of Information and Electronics Beijing Institute of Technology College of Information Engineering North China University of Technology

Dear editor,Object capturing and tracking in airborne remote sensing video is one of the hottest research topics,which is widely used in disaster monitoring and rescue and vehicle *** of the high realtime requirement ... 详细信息

关键词： Capturing and tracking of building area based on structure saliency in airborne remote sensing video SIFT area

Detection of oil spills in a complex scene of SAR imagery

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2014年第11期57卷 2204-2209页

作者： FENG Jing CHEN He bi fukun LI JunXia WEI Hang School of Information and Electronics Beijing Institute of Technology College of Information Engineering North China University of Technology

We present a method for detecting oil spills in a complex scene of SAR imagery,including segmenting oil spills,and avoiding false *** is carried out using a multi-time and multi-hierarchical method by dividing the complex sea surface into bright sea and dark ***-based and edge-based segmentations are done to extract oil spills from bright and dark sea,*** proposed method can extract complete oil spills,obtain better visual results,and increase detection probability more accurately than the traditional *** on the surrounding features and the oil spills’features,dark land spots and low contrast dark spots are removed efficiently,thus reducing false *** experimental results demonstrate that the proposed algorithm has fast computation speed,high detection accuracy,and is very useful and effective for detecting oil spills in SAR imagery.

关键词： SAR image oil spills detection dark spot extraction recognition and classification false alarm rejection

维普期刊数据库

PVP-modified spindle-shaped MIL-88B(Fe) to enhance the degradation of tetracycline by activated peroxodisulfate: A comparative study and mechanistic investigation

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2023年第6期33卷 872-880页

作者： Jiafeng Wei Yaofei Zhang Zhuoxuan Zhou fukun bi Rong Qiao Shuntong Jiang Jinfeng Wang Xiaodong Zhang School of Environment and Architecture University of Shanghai for Science and Technology College of Food Science and Technology Shanghai Ocean University

Various morphologies of MIL-88B(Fe) catalysts were successfully synthesized by adjusting the precursor solution volume and adding NaOH or polyvinylpyrrolidone(PVP) as a *** them,M88B-S grown with PVP as a structure-directing agent exhibited the best performance in activating peroxodisulfate(PDS) for tetracycline(TC) *** results showed that PVP not only increased the abundance of the(101) facet of M88B-S but also facilitated the rapid transfer of surface photo-generated *** experiments demonstrated that the synergistic of ·OH and ·O2-promoted the degradation of TC.

关键词： MIL-88B(Fe) Peroxodisulfate Tetracycline Polyvinylpyrrolidone

A novel sea-land segmentation based on integral image reconstruction in MWIR images

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2017年第6期60卷 269-271页

作者： Yin ZHUANG Dechun GUO He CHEN fukun bi Long MA Nouman Q.SOOMRO School of Information and Electronics Beijing Institute of Technology School of Electronic Information Engineering North China University of Technology Department of Software Engineering Mehran University of Engineering and Technology

Dear editor,Middle wave infrared remote(MWIR)technology is the main approach in remote sensing applications,because thermal infrared can work *** MWIR technology can provide valid object information in remote sensing ... 详细信息

关键词： In GFM A novel sea-land segmentation based on integral image reconstruction in MWIR images

Recent advancement and future challenges of photothermal catalysis for VOCs elimination:From catalyst design to applications

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2023年第3期8卷 654-672页

作者： Yang Yang Shenghao Zhao Lifeng Cui fukun bi Yining Zhang Ning Liu Yuxin Wang Fudong Liu Chi He Xiaodong Zhang Environment and Low-Carbon Research Center School of Environment and ArchitectureUniversity of Shanghai for Science and TechnologyShanghai 200093China College of Smart Energy Shanghai Jiao Tong UniversityShanghai 200240China Institute of Applied biotechnology Taizhou Vocation&Technical CollegeTaizhou Zhejiang 318000China Department of Civil Environmentaland Construction EngineeringCatalysis Cluster for Renewable Energy and Chemical Transformations(REACT)NanoScience Technology Center(NSTC)University of Central FloridaOrlandoFL 32816United States State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'anShaanxi 710049China

Photothermal catalysis realizes the synergistic effect of solar energy and thermochemistry,which also has the potential to improve the reaction rate and optimize the *** this review,the research progress of photothermal catalytic removal of volatile organic compounds(VOCs)by nano-catalysts in recent years is systematically ***,the fundamentals of photothermal catalysis and the fabrication of catalysts are described,and the design strategy of optimizing photothermal catalysis performance is ***,the performance for VOC degradation with photothermal catalysis is evaluated and compared for the batch and continuous ***,the catalytic mechanism of VOC oxidation is systematically introduced based on experimental and theoretical ***,the future limitations and challenges have been discussed,and potential research directions and priorities are highlighted.A broad view of recent photothermal catalyst fabrication,applications,challenges,and prospects can be systemically provided by this review.

关键词： Photothermal catalysis VOCs Catalyst design Light-driven thermal catalysis Photothermal synergistic effect

维普期刊数据库

A Harmful-Intrusion Detection Method Based on Background Reconstruction and Two-Dimensional K-S Test in an Optical Fiber Pre-Warning System

在线全文

学校读者我要写书评

暂无评论

Photonic Sensors 2016年第2期6卷 143-152页

作者： fukun bi Tong ZHENG Hongquan QU Liping PANG College of Information Engineering North China University of Technology Beijing 100144 China School of Aeronautic Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100191China

The key technology and main difficulty for optical fiber intrusion pre-warning systems （OFIPS） is the extraction of harmful-intrusion signals. After being processed by a phase-sensitive optical time-domain reflectometer （O-0TDR）, vibration signals can be preliminarily extracted. Generally, these include noises and intrusions. Here, intrusions can be divided into harmful and harmless intrusions. With respect to the close study of signal characteristics, an effective extraction method of harmful intrusion is proposed in the paper. Firstly, in the part of the background reconstruction, all intrusion signals are first detected by a constant false alarm rate （CFAR）. We then reconstruct the backgrounds by extracting two-part information of alarm points, time and amplitude. This ensures that the detection background consists of intrusion signals. Secondly, in the part of the two-dimensional Kolmogorov-Smirnov （K-S） test, in order to extract harmful ones from all extracted intrusions, we design a separation method. It is based on the signal characteristics of harmful intrusion, which are shorter time interval and higher amplitude. In the actual OFIPS, the detection method is used in some typical scenes, which includes a lot of harmless intrusions, for example construction sites and busy roads. Results show that we can effectively extract harmful intrusions.

关键词： Optical fiber intrusion pre-warning extraction of harmful-intrusion signals two-dimensional K-S test