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Based on the analysis of the polarization index of the Sentine-1 radar image before and after the lodging, the lodging classification model at the regional scale is established. The polarimetric index of Sentinel-1 radar image was extracted and analyzed according to the correlation analysis between the lodging index before and after the lodging. The degree of lodging was divided by the difference...
Precision agriculture relies on real-time data gathering and analysis to maximize yield, minimize environmental impact and reduce cost, which has been envisioned as a new paradigm to revolutionize modern agriculture. However, the collection of farming data, especially geospatial data, raises concerns about potential privacy leakage. In this paper, we propose a novel scalable and private continual...
This paper studies the fault tolerant safe control of nonlinear systems. The proposed theory ensures that the state of the system is away from the unsafe set, and asymptotically stable as well in the presence of faults. The theoretical results are applied to an attitude dynamics of a hypersonic vehicle with actuator faults.
In this study, the threshold voltage and breakdown voltage of a double-channel AlGaN/GaN HEMT is improved. Firstly, depletion mode (D-mode) is changed to enhancement mode (E-mode) by optimizing the depth of the recessed gate, the Al ratio in the AlGaN layer, and the doping concentration of the p-doped region. Secondly, the E-mode device with highest breakdown voltage is selected, and then implemented...
This paper deals with model reduction by balanced truncation of fault tolerant switched systems. The conditions, which guarantee the stability of fault tolerant switched system and the error between the states of switched system and reduced order switched system is in a certain range, are proposed. It shows that fault tolerant switched system can be reduced by the same truncated of original switched...
A 300 GHz waveguide filter, designed to block the unwanted upper sideband from reaching a heterodyne mixer, is presented. This WR-3 filter is based on three cross-coupled TE101 resonators. It is designed to have a Chebyshev response, and cross-coupling between first and third resonators provides transmission zeros in the stopband. The filter is fabricated using a multilayered SU-8 micromachining process...
Human motion detection based on CSI (Channel State Information) is a hot research topic. Many researchers started to focus on it. In this paper, we employ the CSI to detect fall behavior. Firstly, a data weighting operation to smooth the noise will be implemented. Secondly, we extract behaviors data by effect size. Thirdly, several features will be extracted to represent the original data. Finally,...
The popularity of smartphones provides a new data collection paradigm, participatory sensing, which extends existing web-based crowdsourcing applications to pervasively collect sensing data around the physical world. It is important to design an effective incentive strategy to attract enough users' participation to guarantee the success of participatory sensing applications. Most of existing incentive...
This paper proposes a fault tolerant cooperative control strategy for a class of complex network systems with the time varying interconnection topology. The general neighboring rule-based linear cooperative protocol is developed and a sufficient synchronization condition is derived. Moreover, it is shown that the target point is still reached with the proposed fault tolerant cooperative control method...
Multi-instance multi-label (MIML) learning has many interesting applications in computer visions, including multi-object recognition and automatic image tagging. In these applications, additional information such as bounding-boxes, image captions and descriptions is often available during training phrase, which is referred as privileged information (PI). However, as existing works on learning using...
In this paper, the robustness of a class of homo-geneous systems is investigated, in which a relation among the high-order term, the converging rate and the stability region of the system is explicitly established. Such a new observation facilitates to establish several robust stabilization conditions for switched homogeneous systems with high-order terms. Several stability regions related to exponential,...
This paper presents a novel de-centralized cycle-free traffic signal controller that adapts to changes in traffic demand. Traffic signal timing optimization is achieved using a Nash Bargaining game-theoretic framework, where each phase is modeled as a player in a game in which the players cooperate to reach a mutual agreement. The Nash bargaining solution is applied to obtain the optimal control strategy,...
The purpose of this study was to investigate the effectiveness of blended learning and traditional learning on students' learning achievements and academic press. A quasi-experiment study was conducted using a sample of 104 sophomores in a university in central China for three months. While students in the experimental group employed the blended learning approach, students in the control group employed...
Network-wide fuel consumption along arterial roadways increases as the number of vehicle stops caused by traffic signals increase. Eco-Cooperative Adaptive Cruise Control for Multiple Signals (Eco-CACC-MS) systems are being introduced to increase vehicle fuel consumption savings in the vicinity of signalized intersections. These Eco-CACC-MS systems utilize traffic Signal Phasing and Timing (SPaT)...
The purpose of this study was to analyze and compare the digital citizenship behavior of college students from differing socioeconomic regions of origin. Data was collected with the Digital Citizenship Scale from 712 college students in central China. The results showed students from higher socioeconomic regions of origin displayed more appropriate digital citizenship behaviors than students from...
To realize the vision of Internet-of-Things (IoT), numerous IoT devices have been developed for improving daily lives, in which smart home devices are among the most popular ones. Smart locks rely on smartphones to ease the burden of physical key management and keep tracking the door opening/close status, the security of which have aroused great interests from the security community. As security is...
The induction motor system is dynamically formulated by both the mechanical and electrical equations. In system identification of an induction motor, main objective is to compare parameters between identified by using rotating speed and that by both rotating speed and robust observer. The real-coded genetic algorithm (RGA) is adopted to identify all parameters, and the reduced-order robust observer...
Online underground economy is an important channel that connects the merchants of illegal products and their buyers, which is also constantly monitored by legal authorities. As one common way for evasion, the merchants and buyers together create a vocabulary of jargons (called "black keywords" in this paper) to disguise the transaction (e.g., "smack" is one street name for "heroin"...
Compressive Sampling(CS) has been currently utilized to save transmission consumption of sensors. In spite of the remarkable efforts the community put to a variety of designs, a vital question still remains unclear that whether the execution costs of sensors employing CS is not worth being considered, motivating us to explore the answer from a point of real deployment platform view. Presenting observations...
We report third-harmonic generation in multilayer graphene on fused silica with layer numbers of up to <50. Calibration of the thickness is carried out using atomic-force microscopy. High-contrast microscopy demonstrates its layer-dependence and coherent nature.
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