This paper proposes a new Simultaneous Localization and Mapping (SLAM) method on the basis of graph-based optimization through combination Light Detection Ranging (LiDAR), RGB-D camera, encoder Inertial Measurement Unit (IMU). It can conduct joint positioning four sensors by taking advantaging unscented Kalman filter (UKF) to design related strategy 2D LiDAR point cloud camera cloud. 3D information generated under has been added into SLAM in sequential registration stage, it match using...

In this paper, a novel approach based on the support vector machine (SVM) for dielectric target detection in through-wall scenario is proposed. Through-wall converted to establishment and use of mapping between backscattered data parameter target. Then propagation efiects caused by walls, such as refraction speed change, are included that can be regressed after SVM training process. The testing obtained flnite-difierence time-domain (FDTD) simulation. Numerical experiments show once phase...

Real time performance is in rigorous demand substation. IEC 61850, the only international standard substation automation system, makes clear requirements on it. However, doesn't give any instructive suggestions security. Therefore, this paper puts forward an idea of encryption mixed by Data Encryption Standard (DES) and RSA public-key algorithms to further ensure message's security while maintaining real performance. This combines advantages avoids defects either algorithm. The effectiveness...

In order to solve electromagnetic inverse scattering problem, a real-time method is proposed. This technique converts the problem into regressed one using support vector machine (SVM). Electromagnetic based on SVM deals with nonlinearity and ill-posedness inherent in successfully. The feasibility validity are tested by making use of simulating through-wall results demonstrate that this approach can detect position targets behind wall, no matter whether there exists noise or not. scenario,...

In through-wall radar imaging (TWRI), ambiguities in wall characteristics including the thickness and relative permittivity will distort image shift imaged target position. To quickly accurately estimate parameters, an approach based on a support vector machine (SVM) is proposed. TWRI problem, nonlinearity embodied relationship between backscatter data which can be obtained through SVM training process. Measurement results reveal that once phase completed, technique only needs no more than...

High-frequency electromagnetic inverse scattering of conductors has many practical applications. Its goal is to reconstruct the shape from their scattered fields at some distances. When viewed pixelated imaging viewpoint, any pixel in domain either a conductor or background (air); thus such an problem binary solutions for all pixels. Under high-frequency physical optics (PO) approximation, field formulated as linear terms local function. A inversion method proposed detection and...

The range of the power transmission region can be effectively enlarged by a multiple-transmitter (TXs) and single-receiver (RX) magnetic wireless transfer (WPT) system. However, efficiency (PTE) WPT system with two TXs single RX has been intensively studied in past few years. Therefore, deep analysis multiple-TX systems needs to implemented urgently achieve highest PTE wider transmission. This paper analyzes general single-RX detail based on circuit model. Two optimal conditions, which...

To safely and rationally participate in dense heterogeneous traffic, autonomous vehicles require to sufficiently analyze the motion patterns of surrounding traffic-agents accurately predict their future trajectories. This is challenging because trajectories are not only influenced by themselves but also spatial interaction with each other. Previous methods usually rely on sequential step-by-step processing Long Short-Term Memory networks (LSTMs) merely extract interactions between neighbors...

On the basis of measurements and theoretical analysis, linear nonlinear optical properties on Ag:Bi2O3 composite films with different Ag concentrations were investigated. The relationship between surface plasmon resonance (SPR) characterized by UV-VIS-NIR spectroscopy, dependence third-order susceptibility was investigated picosecond Z-scan technique excitation wavelength (532nm 1064nm). analysis these carried out using theories localized field enhancement respectively. From experimental...

Electromagnetic imaging of inhomogeneous objects is a nonlinear inverse scattering problem which can be effectively handled by means linear inversion methods or optimization methods. In addition to being nonlinear, problems are also ill-posed overcome through regularization scheme taking into account some kind priori information. However, it not straightforward incorporate such inhomogeneity prior information conventional this work, we propose an innovative method solve the with piecewise...

An energy-balanced multicast routing algorithm EBMR in wireless sensor networks (WSNs) is proposed. The objective of EMBR to improve the energy efficiency and extend network lifetime multicast. To achieve this goal, consumption model WSNs analyzed an energy-constrained metric for forwarder selecting studied. Then framework discussed. Simulation results show that able reduce whole evenly. Compared with shortest path tree (SPT) algorithm, will lifetime.

Wireless power transfer (WPT) system with multiple transmitters (TXs) and one receiver (RX) can effectively enlarge the range of transmission region. The delivered to load (PDL) efficiency (PTE) two-TX WPT has been intensively studied in past few years. To achieve a wider transmission, multiple-TX should be investigated urgently. Using Kirchhoff's voltage law (KVL) RX-side reflected theory (RLT), this study analyses general single-RX systems detail. explicit closed-form equations for highest...

On the basis of measurement and theoretical analysis，optical nonlinear optical properties Au：TiO2 Au：Al2O3 composite films with different Au nanoparticle size substrates were investigated. The relationship between surface plasmon resonance (SPR) characterized by UV-VIS-NIR spectroscopy，and dependence third-order susceptibility on was investigated picosecond Z-scan technique exciting wavelengths (532nm 1064nm). analysis these carried out using theories localized field...

A novel method based on the relevance vector machine (RVM) for inverse scattering problem is presented in this paper. The nonlinearity and ill-posedness inherent are simultaneously considered. embodied relation between scattered field target property, which can be obtained through RVM training process. Besides, rather than utilizing regularization, ill-posed nature of inversion naturally accounted because produce a probabilistic output. Simulation results reveal that proposed RVM-based...

A new approach is proposed for the planar array failure diagnosis from a set of far-field measurements. Under framework Bayesian learning, Bernoulli–Gaussian (BG) model constructed to exploit binary prior information unknown elements. Subsequently, variational expectation maximization (EM) strategy used perform inference. Moreover, damped generalized approximate message passing (GAMP) further adopted circumvent matrix inversion in EM procedure, thus making overall process computationally...

To solve the real-time through-the-wall imaging problem in presence of wall ambiguities, an approach based on least-squares support vector machines (LS-SVMs) is proposed. This technique converts into establishment and use a mapping between backscattered data target properties. The parameters propagation effects caused by walls are both included can be regressed after LS-SVM training process. properties estimated using LS-SVM. Noiseless noisy measurements performed to demonstrate that provide...

In the practical application of Ultra Wideband (UWB) through-wall radar imaging, walls that are generally encountered consist multiple layers, and there may be targets, which presents challenges for imaging algorithm. this study, both backprojection (BP) algorithm, is a time-domain phase-shift migration (PSM) frequency-domain used to locate two targets behind two-layer wall. The image quality, azimuth range resolutions, entropy processing time algorithms compared. simulation results...

In microwave tomography (MWT), electric-parameter distributions of the breast can be reconstructed to detect early-breast-cancer, which has a specific physical explanation and medical diagnostic value. time-domain, finite-difference time-domain (FDTD) method is usually applied these problems. However, due constraint Courant-Friedrich-Levy (CFL) stability condition, time step should small enough well match fine cells, begets an increasing computational cost, such as central processing unit...

On the basis of measurement and theoretical analysis, linear nonlinear optical properties CdSe quantumn dots with different nanoparticle sizes were investigated. The relation between size absorption peak was characterized by UV-VIS-NIR spectroscopy, dependence third-order susceptibility on investigated picosecond Z-scan technique excitation wavelengths (532nm 1064nm,resp.). analysis films carried out using theory localized field enhancement. experimental results showed susceptibilities χ(3)...