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We show that the optical cross section of a single two-level system embedded in photonic crystals can be enhanced by 4 orders of magnitude near the vicinity of Dirac and Weyl points.
In the field of video-based fire detection, traditional fire color models have poor adaptability and susceptibleness to environmental interference. As fire can be divided into fire core, inner fire and outer fire layers depending on its temperature and color, a new fire detection model based on dispersion of fire color components has been proposed by the author. In order to further reduce false alarm,...
This paper addresses the containment control problem for discrete-time high-order multi-agent systems with time-varying delays. Based on the distributed containment control protocol only depends on the agent's own information and its neighbors' partial information, the properties of the product of infinite nonnegative matrices and the composite of binary relation are utilized to derive a necessary...
This article presents the application of novel S-shaped structure in peach-like UWB antenna with dual band notched characteristics. The S-shaped structure is composed by a square patch and two L-shaped slots with center symmetry. It has the advantage of small size, relatively long current path, and dual band-notched characteristics. The proposed antenna is simulated by using CST Microwave Studio to...
This paper designed a control system for robotic wheelchair for the aged and the disabled, which consisted of two main parts: gesture interaction and intelligent wheelchair. This design used the Kinect camera to develop the problem of hand gesture segmentation and gesture tracking. The segmentation algorithm based on skin color and depth information method. Then the system gets the information of...
Petrochemical hydrogenation unit has often been operated under high-temperature, high-pressure or critical hydrogen condition, probably resulting in severe accident such as leaking, fire and explosion. The reasonable emergency response program is an important guarantee for controlling the spread of risk and reducing the consequence of accident. There are a lot of database files in petrochemical units,...
Recently, with the rapid development of earth observation (EO) techniques, the similar object information has been acquired in different regions, by the use of various sensors. It brings up a new challenge, that is, how to identify cross-domain objects. To cope with this difficulty, we first revisit the linear discriminative Laplacian eigenmaps (LDLE) in this paper, and further add a Bregman divergence...
This paper proposes a scattering model based segmentation technique for polarimetric synthetic aperture radar (PolSAR) images. The method is composed of two main parts: merging predicate and merging order. The merging predicate is based on the idea of the fractal network evolution algorithm (FNEA). The heterogeneity of the scattering characteristics between adjacent regions is calculated to judge...
A lodged wheat detection algorithm by applying a false alarm rate to the circular-pol correlation coefficient (CCC) and the total scattered power (Span) is proposed. The CCC is first used to identify non-lodged wheat, which is reflection symmetry. The Span feature is introduced to distinguish lodged wheat from canola in the study area, according to their large difference in scattering intensity. The...
The containment control problem for general discrete-time second-order multi-agent systems is investigated in this paper. Based on a distributed containment control algorithm with the state gain parameters in a given range, we transform the system to an equivalent error system, and then analyze the convergence of the error system by the eigenvalues of the corresponding coefficient matrix. Finally,...
Device-free localization (DFL) is an emerging wireless network target localization technique that does not need to attach any electronic device with the target. It is remaining as a challenging research problem due to the weak wireless signals and the uncertain wireless communication environment. In this paper, a novel Gaussian Process (GP) based wireless propagation model is proposed to describe...
Acquiring the accurate 3-D position of a target person around a robot provides fundamental and valuable information that is applicable to a wide range of robotic tasks, including home service, navigation and entertainment. This paper presents a real-time robotic 3-D human tracking system which combines a monocular camera with an ultrasonic sensor by the extended Kalman filter (EKF). The proposed system...
The myriad of sensor information that can be collected using smartphones, wearables and other IoT devices greatly benefits context-aware applications. These applications rely heavily on mobile devices, present in locations of interest, to offload raw or processed sensor data in order to accurately capture, recognize and classify the surrounding real-time context. However, continuous sensing and offloading...
In order to meet the development goals of distribution networks while maintaining the environment to continue to provide the natural resources and ecosystem services upon which the economy and society depends, distributed energy resources have been continuously integrated on the grid. Assessing the impacts of integrating those distributed energy resources and evaluating the sustainability of the distribution...
To leverage the potential of bilateral contracts in the smart grid, we address the conflict-of-interest problem of designing energy portfolios. From the viewpoint of competing Utility companies, we present a game theoretical formulation for contract offering with integration of wind energy. We propose a heuristic algorithm, the Recursive Genetic Annealing algorithm (RGAn), to find the Nash-Equilibrium...
Frequent pattern mining is playing an increasingly important role in a growing number of real-time data flow scenarios, such as large-scale order stream data, network traffic monitoring, web accessing record stream, and so on. The continuous, unbounded and high speed characteristics of massive data stream are a huge challenge for the current frequent pattern mining approach. The main challenge is...
New ADCP(Acoustic Doppler current profiler) can estimate surface wave based on current measurement. Now existing tilt correction algorithm only considers attitude angle pitch and roll, for example, TRDI wave processing software WAVESMON suggest if attitude angle pitch, roll is greater than 10 degrees, wave estimation should be tilt corrected. The author's previous research shows that both attitude...
Asynchronous containment control problem of discrete-time multi-agent system is investigated in this paper. It is assumed that each agent can detect the state information of neighbors to update its state by its own clock, which is independent of the other agents. Based on nonnegative matrix theory and graph theory, we derive a necessary and sufficient condition to guarantee that all the follower agents...
The life of many wireless sensor networks is limited by their battery-based energy source. Recharging batteries from a distance by the wireless energy transferring technique could lift this restriction. However, how to deploy the mobile charging device requires further research. In this paper, we take the energy constraint of mobile wireless charger (MWC) into consideration and aim at minimizing the...
Three degrees of freedom (3-DOF) robotic manipulator is a kind of cost-effective industrial robot which is widely used in production lines. A method to analyze the structural design and kinematic equations for a 3-DOF robotic manipulator is presented in this paper. Firstly, a new type of 3-DOF robotic manipulator was introduced. Its kinematic equations and inverse solution were established based on...
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