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16th Pacific-Asia Conference on Advances in Knowledge Discovery and Data Mining, PAKDD 2012

作者： Yang, Dong-Mei Zheng, Hui Yan, Ji-Kun Jin, Ye Science and Technology on Blind Signal Processing Laboratory China Southwest Electronics and Telecommunication Technology Research Institute China

ISBN: (纸本)9783642302169

We present the Document-Entity-Topic (DET) model for semantic social network analysis which tries to find out the interested entities through the topics we aim at, detect groups according to the entities which concern the similar topics, and rank the plentiful entities in a document to figure out the most valuable ones. DET model learns the topic distributions by the literal descriptions of entities. The model is similar to Author-Topic (AT) model, adding the key attribute that the distribution of entities in a document is not uniform but Dirichlet allocation. We experiment on the "Libya Event" data set which is collected from the Internet. DET model increases the precision on tasks of social network analysis and gives much lower perplexity than AT model. © 2012 Springer-Verlag.

关键词： Semantic Web

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Wireless sensor networks in application to patients health monitoring

Wireless sensor networks in application to patients health m...

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IEEE Symposium on Computational Intelligence in Healthcare and e-health

作者： Stanislaw Rajba Pawel Raif Teresa Rajba Mufti Mahmud Department of Electrical Engineering and Automation University of Bielsko-Biała Bielsko-Biala Poland Department of Mathematics and Computer Science University of Bielsko-Biała Bielsko-Biala Poland Department of Biosensors and Biomedical Signals Processing Silesian University of Technology Gliwice Poland NeuroChip Laboratory University of Padova Padova Italy

This work presents an application of Wireless Sensor Network (WSN) of random access with one-way transmission to the monitoring of hospital patients. In the paper, we consider WSN single-hop network using one single radio frequency, such that all nodes are divided into several groups depending on the average time between the transmission due to the different state of health of patients. We apply the Poisson Arrivals See Time Averages (PASTA) to modeling of WSN. We present formula for the probability of collisions which has been verified by simulation studies of network.

关键词： Wireless sensor networks Protocols Monitoring Hospitals Wireless networks Mathematical model Ad hoc networks

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The Feasibility Analysis of Aerial Moving Target Location Based on TDOA/FDOA/DSF Measurements

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Procedia Engineering 2012年 29卷 785-790页

作者： Bing Deng Jinyu Xiong Changxiong Xia Science and Technology On Blind Signal Processing Laboratory Chengdu China

In this paper, Doppler-shift frequency measurements are introduced into the Dual-Satellite Geolocation System to implement location for aerial moving target. The location model is established first, and then the rank of the observation matrix is proposed as standards of location observability, and two typical motion models, the uniform linear motion and the maneuvering turn motion are analysed and their observation matrix are given. Finally, simulation results presente a conclusion that Dual-satellite geolocation system can implement location effectively for aerial moving target by adding the Doppler-shift frequency measurements of single satellite under some restrictions.

关键词： Dual-satellite geolocation TDOA FDOA Doppler-shift frequency moving target observability

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Time Delay Estimation Using Windowed Differential agnitude of Cross Correlation and Its Hilbert Transform

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Procedia Engineering 2012年 29卷 2033-2038页

作者： Xinxin Ouyang Laiyuan Luo Jinyu Xiong Science and Technology On Blind Signal Processing Laboratory Chengdu China

A method is proposed for estimating time delay between MFSK signals received at two spatially separated sensors. onsidering the periodical characteristic of the peaks of cross correlation, the proposed method combines window echnology and differential magnitude between cross correlation and its Hilbert transform. The time argument at hich the differential magnitude achieves the peak in the range of window is the delay estimate. The method is ompared with several other methods. Simulation results show that the proposed method can get better performance. nder certain conditions the performance of proposed method can be better than CRLB by using priori information bout the transmitter and receivers.

关键词： MFSK time delay periodical peak window Hilbert transform

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A Predict Deterministic Finite Automaton for Practical Deep Packet Inspection

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Procedia Engineering 2012年 29卷 2156-2161页

作者： Qiang Wei Yunzhao Li Yanjie Chu Science and Technology On Blind Signal Processing Laboratory Chengdu China

Deep packet inspection has become extremely important due to network security. In deep packet inspection, the packet payload is compared against a set of patterns specified as regular expressions. Regular expressions are often implemented as deterministic finite automaton (DFA) for matching in linear time at high network link rates. We proposed a predict DFA which can accelerate the processing speed of DFA. A predict DFA uses additional information to predict several next transitions. We tested our proposal on Layer7 rule-set and validated it on real traffic traces, experiments show that our approach offers a significant performance improvement by accelerate rate factors from 1.6 to 2.8 over original DFA.

关键词： Deep packet inspection Regular expression DFA

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Research on Tracking Method of Space Target Based on Interacting Multiple Models

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Procedia Engineering 2012年 29卷 2726-2731页

作者： Kuo Hu Huafeng Peng Wuqin Tong Science and Technology On Blind Signal Processing Laboratory Chengdu China

The existing methods of space target tracking cant track the maneuver space target accurately and steady. In order to solve this problem, a method for maneuver space target tracking based on IMM is proposed in this paper. After introducing the flow of Kalman Filtering, which is the basic of target tracking algorithm, and analysing Dynamic and Kinematic models relatively, the two models are combined by IMM algorithm. Simulation result demonstrate that This two algorithms combination not only improves tracking precision in tracking, but also solves the maneuver problem efficiently for space target.

关键词： Space target maneuver State model Interacting Multiple Model

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A Novel Cramer-Rao Lower Bound of Time Difference of Arrival for Frequence Hopping signals

A Novel Cramer-Rao Lower Bound of Time Difference of Arrival...

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International Congress on Image and Signal processing

作者： Jinyu Xiong Xinxin Ouyang Laiyuan Luo Science and Technology on Blind Signal Processing Laboratory

ISBN: (纸本)9781467309653

Frequency hopping signals have been widely used in military and civilian applications during the last few decades. It's of great value to locate emitters of frequency hopping signals, especially in military operations. Localization by time difference of arrival (TDOA) is a passive location method of good accuracy which utilizes the differences between the arrival times of signals received by multiple receivers at different sites. Many researchers have been published on TDOA estimation algorithms for signals in passive location systems, but there have been few results in the literature about the TDOA estimation accuracy of frequency hopping signals. In this paper, a novel Cramer-Rao lower bound (CRLB) of TDOA estimation for frequency hopping signals is proposed and derived based on the given frequency hopping signal model. Theoretical analysis has revealed how frequency hopping signals' parameters, such as signal band, channel interval, hop duration and signal-to-noise ratio (SNR), affect the estimation performance. Simulation results have justified the theoretical derivation.

关键词： Time difference of arrival Frequency hopping signal Cramer-Rao lower bound Time difference of arrival Frequency hopping signals frequency hopping signal TimeDif signal to noise ratios Cramer-Rao bounds arrivals Multiple Receiver passive location

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A brain-computer interface test-bench based on EEG signals for research and student training

A brain-computer interface test-bench based on EEG signals f...

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IEEE Symposium on Computational Intelligence in Healthcare and e-health

作者： Pawel Raif Mufti Mahmud Amir Hussain Aleksandra Klos-Witkowska Renata Suchanek Dept. of Biosensors and Biomedical Signals Processing Silesian University of Technology Gliwice Poland Department of Electrical Engineering and Automation University of Bielsko-Biala Bielsko-Biala Poland Institute of Information Technology Jahangirnagar University Savar Bangladesh NeuroChip Laboratory University of Padova Padova Italy Department of Medical Genetics Medical University of Silesia Sosnowiec Poland Division of Computing Science & Maths University of Stirling Scotland UK

The paper describes a test-bench model for braincomputer interface research based on EEG signals. The test-bench is going to be used for students training and education. The goal is to prepare modern Brain-Computer In... 详细信息

关键词： Electrodes Electroencephalography Brain-computer interfaces Open source software Educational institutions Brain modeling

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Direction finding error analysis of over-water troposcatter propagation signals

Direction finding error analysis of over-water troposcatter ...

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Congress on Image and Signal processing, CISP

作者： Shangpeng Li Hui Zheng Science and Technology on Blind Signal Processing Laboratory Chengdu China

ISBN: (纸本)9781467309653

Troposcatter propagation is one of major way that ultrashort wave and microwave propagate over horizon. It often forms irregular or stable air layer above sea, so wave propagate by means of incoherent reflecting of the irregular layer or coherent reflecting of the stable layer. The accuracy direction finding of over-water troposcatter propagation signals make sense of situation awareness of targets beyond the horizon. The troposcatter propagation model is built up. The effect of troposcatter propagation mechanism acts on direction finding error is analyzed. This paper has guiding value for amendment of direction finding error.

关键词： Electric fields Receivers Transmitters Antennas and propagation Signal processing Accuracy Reflection

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Persona analysis with text topic modelling

Persona analysis with text topic modelling

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International Conference on Automatic Control and Artificial Intelligence, ACAI 2012

作者： Yang, Dong-Mei Zheng, Hui Yan, Ji-Kun Jin, Ye Science and Technology on Blind Signal Processing Laboratory Mail Box No.666 Chengdu 610041 China Southwest Electronics and Telecommunication Technology Research Institute Mail Box No.666 Chengdu 610041 China

ISBN: (纸本)9781849195379

We present a new way called Persona Analysis with Text Topic Modelling (PATTM), which tries to learn the role of personae according to the literal descriptions. It is similar to Latent Dirichlet Allocation (LDA) and Author Topic (AT) model, with the attribute of allowing all text to join in the topic modelling process, even when there is no persona in the text. We experiment on the Libya Event data set which contains more than 4,000 texts collected from the Internet. The PATTM gives lower perplexity than LDA and AT model on the data set.

关键词： Statistics

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