This paper proposes a robust detection and tracking method that can detect track ship targets in cluttered forward looking infrared image sequences. The proposed includes two major steps, target tracking. Because the target's imaging size will be scaled-up gradually along with distance being reduced, process is analyzed detail estimated real-time. Based on estimation of size, different sizes treated as small by scaling operation detected successfully using improved multilevel filter...

This paper presents an effective Polar Format Algorithm (PFA) for spotlight bistatic synthetic aperture radar (SAR) with arbitrary geometry configuration.Nonuniform interpolation and resampling are adopted when converting raw data from polar coordinates to Cartesian according the characteristics of samples in spatial frequency space.Thus, proposed algorithm avoids both rotation transformation calculation azimuth compensation factor thereby corresponding approximate error appeared...

Gas detection based on photoacoustic (PA) spectroscopy has attracted extensive attention due to high sensitivity and portability. Herein, achieve the simultaneously of transformer oil carbide gases, C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> H CO, a gas-detection system one cantilever beam sensor single-pass PA cell was proposed. The infrared light beams were coupled by coarse wavelength division multiplexer (CWDM) fiber coupler,...

Abstract The surface charge accumulation on the basin insulator is a particular problem in high‐voltage direct current (HVDC) gas insulated switchgears (GIS) and transmission lines (GIL), which restricts development application of extra/ultra (EHV/UHV) technology. distribution anti‐flashover performance are closely related to shape. To obtain optimal insulator, shape optimisation model based artificial bee colony algorithm was established, minimisation objective functions capacitive...

This paper presents an Extended Exact Transfer Function (EETF) algorithm for Bistatic Synthetic Aperture Radar (BiSAR) imaging of a Translational Invariant (TI) case.This adopts directly the 2D transfer function monostatic SAR (MoSAR), instead deriving new one, by converting BiSAR into equivalent MoSAR.A azimuth phase compensation is constructed through exploiting this equivalency.Geometry distortion correction result considered in proposed algorithm.In addition, applying condition also...

Abstract Charge accumulation at the insulator surface significantly alters electric field distribution under DC voltage and can lead to unpredictable flashover. It is realized that flashover reliant on charge approaching occurrence (CDAFO). A method of how judge moment was proposed in this study clarify charges induced flashover, whereby dynamic distributions charges, including CDAFO, were obtained from instant application The resulting analyzed with regards insulators coated SiC/epoxy, an...

The nonuniform-interpolation polar format algorithm is developed for processing spotlight SAR data with nonideal platform motions. Instead of two uniform interpolations the conventional (PFA), this employs a one-dimensional interpolation in range direction and nonuniform azimuth to remove effects motion. For azimuth-nonuniform interpolation, output sample spacing depends on pulse number, motion data, can be easily computed. also precomputed stored RAM. computational load almost same as...

This article presents a novel river detection algorithm in synthetic aperture radar (SAR) images. It is based on edge extraction the wavelet domain followed by ridge tracing to merge water region. The approached direct spatial correlation of transform data at several adjacent scales. For algorithm, concept used fingerprint identification introduced complete riverbank linking and connecting greyscale image. improvement avoids disadvantages widely snake model coastline connection. As indicated...

Surface flashover on an insulator caused by the charge accumulation at gas-solid interface is one of main reasons limiting development gas insulated equipment in HVDC condition. Therefore, it helpful to clarify mechanism surface and behavior measuring distribution with high accuracy. In this paper, a inversion algorithm based constrained least square filter (CLSF) proposed for measurement shift-invariant system. By taking image restoration technology as analogy, transfers matrix equation...

In order to clarify the mechanism of how surface coatings affect withstand ability insulator at DC voltage, study flashover on SiC/Epoxy coated was conducted and a method that determine approaching moment (AFM) proposed. Based plate-insulator finger shaped electrode arrangement, characters, as well dynamic charge distribution during applied voltage rising, were studied under two kinds charging methods, i.e. compact uncompact contact condition electrode-insulator interface. It found increased...

A new improved complex-valued iterative adaptive approach is proposed to effectively resolve Doppler ambiguity in multiple pulse repetition frequency (PRF) radar. Exact termination criterion for the method adopted based on sparsity of spectrum. Numerical studies demonstrated effectiveness method.

Three-dimensional (3D) imaging of space targets can provide crucial information about the target shape and size, which are significant supports for application automatic classification recognition. In this paper, a new 3D spinning via factorization method is proposed. Firstly, after translational compensation, scattering centers two-dimensional (2D) range range-rate sequence induced by extracted using high resolution spectral estimation technique. Secondly, measurement data association...

Multisensor data fusion seeks to combine from multiple sensors perform inferences that may not be possible a single sensor alone. The two main processes in multisensor system are the tracking and algorithms. A new hierarchical algorithm for is proposed paper. realization architecture track equations also presented. simulation results included paper indicate method effective multitarget problem.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Complete kernel fisher discriminant analysis (CKFDA) is essentially a practical nonlinear feature extraction criterion based on trick. The process divided into two phases, i.e., principal component (KPCA) and linear (LDA). This work uses different kinds of CKFDA methods to extract the features MSTAR SAR images: one only obtains regular information in "single space", other gains irregular "double subspaces". inspiring recognition results verify that not overcome aspect sensitivity existent...

The accumulation characteristics of cellulose particles in flowing oil were carried out under a slightly non-uniform DC electric field and the effect flow velocities voltages presented this paper. results showed that, with increase velocity, bridge became thinner, time required to form first decreased then increased, indicating that presence accelerated formation range low velocity. As voltage thickened decreased.

When the classical constant false-alarm rate (CFAR) combined with fuzzy C-means (FCM) algorithm is applied to target detection in synthetic aperture radar (SAR) images complex background, CFAR requires block-by-block estimation of clutter models and FCM clustering converges local optimum. To address these problems, this paper pro-poses a new algorithm: knowledge-based improved genetic algorithm-fuzzy (GA-FCM) algorithm. Firstly, takes region's maximum average intensity, area, length long...

We present a multi-sensor decision level image fusion algorithm based on fuzzy theory. The main interest of this method is its high speed classification and efficient complementary information. FCM classifiers are used for each sensor image, the results fused by our rule. originality work to define rule classification. Applications SAR, infrared multi-spectral produce interesting results.