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Emergency Event Matching using Hierarchical Blocking Method

Journal of Physics: Conference Series 2019年第5期1187卷

作者： Chang Wen Yu Liu College of Computer Science and Technology Wuhan University of Science and Technology Wuhan 430065 China Key Laboratory of Intelligent Information Processing and Real-time Industrial System in Hubei Province Wuhan 430065 China Institute of Big Data Science and Engineering Wuhan University of Science and Technology Wuhan 430065 China Key Laboratory of Rich-media Knowledge Organization and Service of Digital Publishing Content National Press and Publication Administration Beijing 100038 China

With the extensive application of the knowledge base (KB), how to complete it is a hot topic on Semantic Web. However, many problems go with the big data, and the event matching is one of these problems, which is finding out the entities referring to the same things in the real world and also the key point in the extending process. To enrich the emergency knowledge base (E-SKB) we constructed before, we need to filter out the news from several web pages and find the same news to avoid data redundancy. In this paper, we proposed a hierarchy blocking method to reduce the times of comparisons and narrow down the scope by extracting the news properties as the blocking keys. The method transforms the event matching problem into a clustering problem. Experimental results show that the proposed method is superior to the existing text clustering algorithm with high precision and less comparison times.

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SAR geometric correction algorithm improvement on multi-core C6678 DSPs

SAR geometric correction algorithm improvement on multi-core...

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2016 IEEE International Conference on Signal processing, Communications and Computing, ICSPCC 2016

作者： Mengyu, Lu Jinghua, Wang Ye, Jin Key Laboratory of Embedded Real-time Information Processing Technology Beijing China China Academy of Space Technology Department of Overall Design Beijing China

ISBN: (纸本)9781509027088

This paper achieves the SAR geometric correction algorithm and makes improvements based on multi-core C6678 DSPs. To solve the insufficient real-time problem, this paper improves the geometric correction, and designs process software that can meet the real-time requirements, from the process flow, process algorithm and storage process aspects. This paper describes the multiple DPSs parallel process scheme and multi-core mapping tasks, and makes a comparison of the time-consuming before optimization and after. And after the optimization, the geometric correction's efficiency is two times of the original. After verification, the parallel process software designed in this paper can meet the real-time requirements of the project, and also has good stability. © 2016 IEEE.

关键词： Verification

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Smooth Transition Process of Sleep Mechanism Based on SDN Framework

Smooth Transition Process of Sleep Mechanism Based on SDN Fr...

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2017 5th International Conference on Advanced Computer Science Applications and Technologies(ACSAT 2017)

作者： Xu Lei Gu Jinguan He Heng School of Computer Science and Technology Wuhan University of Science and Technology Hubei Province Key Laboratory of Intelligent Information Processing and Real-Time Industrial System Wuhan University of Science and Technology

Green network uses sleep mechanism for energy-saving design, achieving sleep mechanism needs to consider that the mechanism may cause data loss, network performance degradation and other situations. In the traditional network, sleep mechanism requires protocol and equipment support, it is complex and low economic benefit. Due to the use of hierarchical and centralized control, software-defined network（SDN） can easily achieve a variety of network applications. The paper realizes the smooth transition process of sleep mechanism of link based on SDN framework. The results show that the design ensures the performance and normal operation of the network while realizing dormancy.

关键词： Sleep mechanism SDN Smooth transition

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Research on Ship Automatic Modeling and Identification System

Research on Ship Automatic Modeling and Identification Syste...

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2017 2nd International Conference on Mechatronics and information technology(ICMIT 2017)

作者： Yao-jie Chen Xin Yuan Shu-lin Du Can Song School of Computer Science and Technology Wuhan University of Science and Technology School of Navigation Wuhan University of Technology Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System

When the ship sails in different water situation, it is necessary to forecast the movement state of the ship according to the real-time ship motion state parameters. The traditional method uses the classical MMG(mathematical model group) three-degree-of-freedom motion mathematical model to predict the modeling. For the existence of less detection parameters, the error is relatively large, the accuracy is not enough and so on. In this paper, a six-degree-of-freedom ship motion model based on sway, surge, heave, roll, pitch and yawing is proposed, combined with the least square method to achieve the automatic identification modeling method. Using this method, according to the GPS inertial navigation and positioning module to collect the data to simulate, and contrast with the traditional modeling method. The experimental results show that the improved automatic identification modeling method has better effect than the traditional modeling method, which greatly improves the accuracy of ship motion prediction.

关键词： automatic identification six degrees of freedom least square method

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Design of Distributed Multi-Parameter Measurement Control System Based On CAN Bus

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IOP Conference Series: Materials Science and Engineering 2018年第4期452卷

作者： Hong Guo Wei Hu College of Computer Science and Technology Wuhan University of Science and Technology Wuhan 430065 China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System Wuhan 430065 China

This paper introduces a multi-parameter distributed measurement control system based on CAN bus network and uses C8051F040 MCU as measurement control node, and corresponding hardware and software design to realize simultaneous detection of multiple measurement nodes. This paper described the overall structure of the system, introduced the hardware design and system software design of the data acquisition and control processing module based on C8051F040 microcontroller, and verified the correctness and feasibility of the system design by experimental tests.

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A Novel Integrated Testing Platform Based on Open VPX

A Novel Integrated Testing Platform Based on Open VPX

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2nd information technology and Mechatronics Engineering Conference(ITOEC 2016)

作者： Fei Wang Shanqing Hu Xingming Li Jie Wang Beijing Key Laboratory of Embedded Real-time Information Processing Technology Beijing Institute of Technology

With the development of high-speed and real-time signal processing systems toward modularization, generalization and reconstruction, a method of modular design has been proposed and accepted widely. However, the increasing module types and extending production scale make the module-test challenged and the test results of modules are dispersed, which make it difficult for collection and post-maintenance. Moreover, it's difficult to perform traversal test with so many module-combinations, and this consumes excess equipments and human resources. In this paper, we proposed a concept of integrated testing, and designed a integrated testing platform(ITP) based on the Open VPX architecture. The ITP can achieve intelligent identification and resources detection of the under-test single/multiple modules after startup, and with the users' manual configurations, the ITP can then perform the traversal test automatically. Besides, the ITP provides functions such as real-time fault alarm and the test report printing. The ITP has been applied in mass testing for an Open VPX-based high-performance processing module, with multiple VLSI(Very Large Scale Integrated) circuits integrated, such as TI TMS320C6678, Xilinx Virtex-6,etc, and greatly increases its efficiency and accuracy.

关键词： automatic test traversal test integration testing platform(ITP) signal processing system

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A New Algorithm of Plots Centroid for Radar Target

A New Algorithm of Plots Centroid for Radar Target

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International Congress on Image and Signal processing, BioMedical Engineering and Informatics

作者： HaiBo Liu Jinbing Li Peiyao Zhang Beijing Key Laboratory of Embedded Real-time Information Processing Technology Beijing Institute of Technology

ISBN: (纸本)9781509037117

For the 2D radar system, in order to improve the performance of target plots, a new algorithm based on geometric center and amplitudes of measurements was proposed, aimed at that the traditional plots centroid algorithm does not use the amplitude information or over-uses it. The proposed algorithm can reduce the weights of the measurements which are far away from the geometric centre, so as to obtain mere accurate range and azimuth estimations even under the circumstances of strong false measurements. Simulations show that the proposed method works better than the traditional methods.

关键词： geometric center radar targets plots centroid

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Medical Entity and Attributes Extraction System Based on Relation Annotation

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Wuhan University Journal of Natural Sciences 2016年第2期21卷 145-150页

作者： ZOU Yuwei GU Jinguang FU Haidong College of Computer Science and Technology Wuhan University of Science and TechnologyWuhan 430065HubeiChina Hubei Province Key Laboratory of Intelligent Information Processing and Real-Time Industrial System Wuhan 430065HubeiChina

The abundant entities and entity-attribute relations in medical websites are important data resources for medical ***,the medical websites are usually characterized of storing entity and attribute values in different *** extract those data records efficiently,we propose an automatic extraction system which is related to entity and attribute relations（attributes and values）of separate *** system includes following modules：（1）rich-information interactive annotation page rendering;（2）separate storage attribute relations annotating;（3）annotated relations for pattern generating and data records *** paper presents the relations about the attributes which are stored in many pages by effective annotation,then generates rules for data records *** experiments show that the system can not only complete attribute relations of separate storage extraction,but also be compatible with regular relation extraction,while maintaining high accuracy.

关键词： relation annotation information extraction medical data relation extraction

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A novel subsidence monitoring technique based on space-surface bistatic differential interferometry using GNSS as transmitters

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Science China(information Sciences) 2015年第6期58卷 68-83页

作者： ZENG Tao ZHANG Tian TIAN WeiMing HU Cheng Beijing Key Laboratory of Embedded Real-time Information Processing Technology Radar Research Laboratory School of Information and ElectronicsBeijing Institute of Technology

Synthetic Aperture Radar Differential Interferometry(DIn SAR) technique is an effective tool with large coverage and high spatial accuracy for subsidence monitoring. Nevertheless, the temporal resolution is usually poor so that rapid deformation cannot be measured due to the long revisit time of radar *** SAR Differential Interferometry technique using Global Navigation Satellite System(GNSS) as illuminator has a shorter revisit time, whereas the measurement accuracy is constrained by low signal power, narrow bandwidth and atmospheric delay error. To cope with these problems, in this paper, we propose a novel subsidence monitoring technique based on Space-Surface bistatic Differential Interferometry(SS-DI) with GNSS transmitters, where two stations consist of a reference one and a measurement one that are deployed on the ground. First, we applied a space differential processing between two stations to cancel identical errors such as tropospheric and ionospheric errors etc. Then we used a long time coherent integration to improve the signal noise ratio. Subsequently, we also utilized a time differential processing to construct double differential equations with respect to unknown deformation variables. Finally, we solved the equations to obtain a highly accurate estimation of three dimension deformation. Furthermore, an SS-DI experiment using Beidou-2 as transmitters was carried out to validate the proposed method, where a high accuracy(0.01 mm) device was utilized to simulate subsidence deformation. The experimental results reveal that the proposed method has better performance of spatial measurement accuracy of 0.53 mm compared with differential GPS method.

关键词： differential interferometry subsidence monitoring Beidou-2/Compass-2 space-surface bistatic radar differential GPS

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Impacts of ionospheric scintillation on geosynchronous SAR focusing: preliminary experiments and analysis

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Science China(information Sciences) 2015年第10期58卷 191-193页

作者： LI YuanHao HU Cheng DONG XiChao TIAN WeiMing LONG Teng Beijing Key Laboratory of Embedded Real-time Information Processing Technology Beijing Institute of Technology

Dear editor,Geosynchronous Synthetic Aperture Radar(GEO SAR)has significant potential when applied to hazard and disaster monitoring because of its short revisit time of approximately 24 h and its wide coverage of app... 详细信息

关键词： SAR Impacts of ionospheric scintillation on geosynchronous SAR focusing GEO PSLR Figure preliminary experiments and analysis than

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