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 pa...
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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.
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 ...
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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.
Traditional side-looking synthetic aperture radar (SAR) and Doppler beam-sharpening (DBS) technologies cannot generate images of the areas in flight direction with high azimuth resolution. To alleviate this problem, a...
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Traditional side-looking synthetic aperture radar (SAR) and Doppler beam-sharpening (DBS) technologies cannot generate images of the areas in flight direction with high azimuth resolution. To alleviate this problem, an innovative approach based on real-beam scanning is presented. Moreover, both the feasibility and the applicable conditions of azimuth super-resolution are discussed. According to the model of echoes in which receiver power is modulated by beam gain, a modified Capon algorithm is employed to calculate the spatial spectrum. Numerical simulation indicates that it can achieve forward-looking imaging for an airborne single-channel radar, and its performance is better than that of Capon when strong signals and weak signals are in co-existence.
In an anonymous secret sharing scheme, the secret can be reconstructed without knowledge of which participant hold which share. That is, in such scheme the secret can be recovered from the shares without the identitie...
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This paper deals with the description, mathematical modeling and recursive output feedback control of a pilot anaerobic plant. Based on experimental results obtained during the start-up and operating of a pilot biorea...
This paper deals with the description, mathematical modeling and recursive output feedback control of a pilot anaerobic plant. Based on experimental results obtained during the start-up and operating of a pilot bioreactor, a five-order continuous-time anaerobic digestion model is obtained. The output trajectory tracking and disturbance compensation for the bioprocess model are realized using a new composed recursive controller comprising a recursive model free stabilization term and a recursive time delay compensation term. The performances of the new bioprocess controller are compared by numerical simulation with the performances of an existing nonlinear proportional-integral controller.
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 operat...
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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.
作者：
Zhang, YanpingWang, YuehuaZhao, ShuAnhui University
Computer Science and Technology Institute Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Hefei Anhui Province 230039 China
In this paper, we propose a novel distributed machine learning method: Parallel Covering Algorithm, which is inspired by the module feature of CA (Covering Algorithm). Classic method of CA is presented, and we analyze...
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In this paper, a multi-rate signalprocessing technique is proposed for obtaining higher-order derivatives of digital signals with an improved signal-to-quantization noise ratio (SQNR). The technique consists of a cla...
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ISBN:
(纸本)9781467346214
In this paper, a multi-rate signalprocessing technique is proposed for obtaining higher-order derivatives of digital signals with an improved signal-to-quantization noise ratio (SQNR). The technique consists of a classical oversampling analog-to-digital conversion (ADC) unit with a dithering process and multi-stage down sampling processing followed by a high performance digital differentiator cascaded using a decimator with a factor of two. In the cascaded multi-stage processing, each stage contains a simple half-band low-pass filter followed with decimation by two. The proposed technique uses an extremely small FIR filter size, hence requires much less memory and computational complexity in comparison with single-stage processing. Computer simulations and experimental data processing demonstrate the effectiveness of the proposed method.
A new method of medical image fusion is proposed in this paper, which is based on human visual models and IHS color space. Retina-inspired difference of Gaussian model is adopted to enhance the spatial information of ...
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DNA sequence design has a crucial role in successful DNA computation,which has been proved to be an NP-hard(non-deterministic polynomial-time hard) *** this paper,a membrane evolutionary algorithm is proposed for the ...
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DNA sequence design has a crucial role in successful DNA computation,which has been proved to be an NP-hard(non-deterministic polynomial-time hard) *** this paper,a membrane evolutionary algorithm is proposed for the DNA sequence design *** results of computer experiments are reported,in which the new algorithm is validated and out-performs certain known evolutionary algorithms for the DNA sequence design problem.
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