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To resolve the formation flight control problem for multiple UAVs (unmanned aerial vehicles), a method based on following of the guidance points is proposed in the paper. The method is realized with the leader-follower strategy. In the method, the guidance points for the leader vehicle are computed from the expected trajectory, while the points for the followers are obtained from the expected formation,...
Monitoring the presence of occupants in a room in a timely manner is a fundamental step for effective building management. Environmental sensor networks have the advantages of high cost-efficiency and non-intrusiveness on privacy and are very suitable for room occupancy detection. Nonlinear discriminative models, e.g., support vector machine and neural networks, have shown good detection performance...
This paper focuses on the problem of built-up areas detection in single high-resolution SAR images. In consideration of the rich structure information of built-up areas in high-resolution SAR images, we put forward a multiscale CNN model to extract multiscale trained features directly from image patches to detect built-up areas. By processing features extraction and classification as a whole, we overcome...
This paper proposes a framework for analyzing video of physical processes as a paradigm of dynamic data-driven application systems (DDDAS). The algorithms were tested on a combustion system under fuel lean and ultra-lean conditions. The main challenge here is to develop feature extraction and information compression algorithms with low computational complexity such that they can be applied to real-time...
This paper addresses the sensor selection problem in a passive sensor network under dynamically varying environment. It is assumed that sensors in the same local area share similar dynamic environmental characteristics but only a few may have events within their respective sensing radii. The main challenge is to select sensors for separation in two categories: (i) those sensors whose outputs contain...
This paper presents a symbolic dynamic method for real-time estimation of battery state-of-charge (SOC). In the proposed method, symbol strings are generated by partitioning (finite-length) time windows of synchronized input-output (e.g., current-voltage) pairs in the respective two-dimensional space. Then, a special class of probabilistic finite state automata (PFSA), called D-Markov machine, is...
Under the cyber-society environment, the information resource shows an explosive growth trend, so how to more effectively achieve the integration and sharing of these resources and create greater benefits has become the most important issue faced by the virtual industry cluster. The enterprises within the virtual industry cluster establish complex connection between each other through the social behavior...
In this paper, a horizontally polarized antenna is proposed for the omnidirectional coverage in the 2.4-GHz WLAN band. The azimuthal omnidirectional pattern is provided by an open-ended cavity with a probe feed. The proposed structure exhibits good imitation of the ideal magnetic current with similar isotropic radiation pattern, even though with asymmetrical structure. A series of numerical simulations...
In this paper, triangular cavity, as a new type of radiating cavity, is proposed and utilized for antenna design. The most important advantage of triangular cavity is to have larger radiating aperture, compared with conventional cavities, e.g., rectangular cavity. By properly periodical arrangement of the shorting strips based on the microstrip transmission line, cascaded triangular cavities are engineered...
A dual-resonant quad-layer transmitarray element is proposed in this paper. The element can be used to construct a circularly polarized transmitarray which converts linearly polarized incident wave into circularly polarized outgoing wave. The element operates at 30GHz and is designed through the principle of multilayer frequency selective approach [1]. By varying the element's dimensions, a full transmission...
An experimental system for communication using orbital angular momentum (OAM) is described in this paper. Both the transmitter and the receiver of the system have 9 independent ports, one of which is to provide a reference phase. By dynamically configuring the feeding signals of the uniform circular array (UCA) through these independent ports, the system is able to generate different OAM states in...
This paper studies the finite-time stabilization problem for a class of nonlinear systems described by Takagi-Sugeno (T-S) fuzzy dynamic models with parametric uncertainties. A novel non-Lipschitz continuous state feedback control scheme with augmented dynamics is developed. It is shown that finite-time convergence of the closed loop system can be achieved, and the potential controller singularity...
A compact hybrid dipole antenna is presented with enhanced bandwidth. The antenna consists of a half-wavelength driven dipole and a one-wavelength parasitic folded dipole. By properly engineering the resonant frequencies of the driven dipole and the parasitic folded dipole, wide bandwidth with S11 ≤ −10 is achieved from 1.82 GHz to 2.27 GHz (450 MHz, 22.7%). The measured results of the proposed antenna...
Ontogenetic hardware mainly involves hardware implementing self-replicating and development based on cellular division and cellular differentiation. Inspired by the transmission mechanism of hormone, this paper presented a four-layer structure model of ontogenetic hardware which based on Network on Chip (NoC). On account of the hierarchical thinking, drawing on the development of multicellular organisms,...
In this paper, we have proposed a 60-GHz air cavity antenna array with checkerboard structure based on the MEMS silicon bulk micromachining technology. A one-to-four power divider with a Si-to-air transition is designed to excite an air-filled cavity antenna array. By properly arranging the four sub arrays, the proposed array is with a checkerboard structure. An in-phase radiating aperture which is...
While numerous flaws have been recognized in using passwords as a method of authentication, passwords still remain the de-facto authentication standard in use today. Though password managers can ameliorate password fatigue, the vast majority of password managers require the user to choose and maintain a strong master password while offering little to no recourse in the event that the master password...
InGaAs channel metal-oxide-semiconductor field-effect transistors (MOSFETs) with thin channels and wide-bandgap InP vertical field spacers in the S/D have been simulated and investigated. I-V characteristics and leakage current are carefully studied. Good performance can be achieved by controlling indium concentration of InGaAs channel, delta doping concentration and InP caplayer thickness. Simulation...
In this paper, an optimization method using Particle Swarm Optimization (PSO) is proposed for the power/ground (P/G) pin assignment of large-scale high-pin-count ball grid array (BGA) packages. A general PSO working flow is introduced, and two examples of P/G pin assignment using the proposed method are presented. For validation, a comparison between Xilinx product and the result from PSO is presented...
In this paper, a package P/G pins assignment optimization method based on simulated annealing (SA) is proposed. Two objective functions describing power integrity (PI) and signal integrity (SI) are introduced. The basic flow of SA is presented, with the redefinition of the neighborhood of solution in SA, which ensures the feasibility in iteration. A 49×49 pinout example generated by the proposed SA...
Considering the defects of background in traffic video that it is easily influenced by illumination, noise and so on, and it is difficult to extract the complete moving target, a new method of moving target extraction based on three frame difference and Log operator is put forward in this paper. Firstly, the original images in video sequences are computed by using three frame difference and Log operator...
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