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In this paper, a single-inductor triple-input-triple-output (SITITO) buck-boost converter with cycle-by-cycle source tracking (CCST) is developed for multi-source energy harvesting. The proposed CCST is capable of harvesting power from the PV and TEG simultaneously, and automatically selects the appropriate source according to the maximum power point (MPP) of the transducers in each switching cycle...
We demonstrate an Er-fiber laser based source that produces 100–200 fs pulses widely tunable from 1300 to 1700 nm, constituting an ideal driving source for three-photon excitation nonlinear optical microscopy.
The under-determined direction of arrival (DOA) estimation problem for a mixture of circular and non-circular signals is studied in the context of sparse arrays and a novel compressive sensing based DOA estimation algorithm is proposed. Compared to a direct application of existing compressive sensing based DOA estimation algorithm, the new one can make a more effective use of the degree of freedoms...
It has been found that stochastic resonance can filter out the image noise and enhance the image. However, since the stochastic resonance has a characteristic that the high frequency energy is shifted to the low frequency, the denoised image will lose detail and become blurred. Because the noise and detail of the image are mainly distributed in the high frequency band, image denoising and detail retention...
Solving the global method of Weighted Least Squares (WLS) model in image filtering is both time- and memory-consuming. In this paper, we present an alternative approximation in a time- and memory- efficient manner which is denoted as Semi-Global Weighed Least Squares (SG-WLS). Instead of solving a large linear system, we propose to iteratively solve a sequence of subsystems which are one-dimensional...
This paper presents the focusing characteristics of near fields radiated from multi-panel phased array antennas, where each panel of the antenna array is designed to focus its radiation in the antenna near-field region, for UHF-RFID applications. The cylindrical arrangement of panels creates a relatively symmetrical focusing region beneficial to the tag detection within a confined region of bio-medical...
The multi-tracking problem of second-order multi-agent system with communication delay is investigated in this paper. An intermittent control protocol is proposed on the basis of only relative position measurement, where the information of agent is quantized before transmission using stochastic quantization scheme. On the basis of algebraic graph theory, stochastic quantization and stability theory,...
In this paper, an optimal retail market pricing design for demand response in day-ahead scheduling of smart distribution networks is investigated. Through the well-designed retail market electricity price, the profit of each user is maximized; while the profit of the Distribution Network Operator (DNO) is guaranteed and the risk management model based on the Information Gap Decision Theory (IGDT)...
This paper studies the fully-distributed consensus problem for multi-agent systems with unknown dynamics and bounded external disturbances. The interaction topology of the multi-agent system is assumed to contain a directed spanning tree. Based on adaptive gains, we present the fully-distributed consensus protocol which can obtain consensus without using any global information. The simulation examples...
For small scale off-grid wind-solar-diesel hybrid generations with energy storage (WHGES), it is necessary to coordinate the operation of generation units and energy storage unit to maintain the voltage constant and supply the loads. This paper proposes a low cost charging scheme for off-grid WHEGES with 48V DC bus voltage. It is possible to realize the dynamic charging control of the storage unit...
This paper presents the experimental results on electromagnetic behavior of galinstan in liquid metal current limiter in case of rated and short circuit current respectively. For the former, the liquid keeps unstable in the channel like ‘boiling’ when DC current of 1kA passes it and pinches to ignite the arc finally within the channel in several minutes, which is observed by a specially designed test...
For face recognition systems, impostors can obtain legal identity authentication by presenting the printed images, the downloaded images or candid videos to the sensor. In this paper, an enhanced face local binary feature (ELBP) of a face map is extracted as a classification feature to identify whether the face map is a real face or a fake face. Compared with the dynamic or static methods proposed...
A configuration method for inverter feedback device has been proposed based on multi-train operation and traction power supply simulation. In order to ensure the safety of traction power supply, the train network voltage and rail potential are considered. And the regeneration failure ratio is sharply reduced. Based on the maximum effective power in the continuous time interval, considering the factors...
The forging handling robot is one of the key pieces of equipment in the integrated forging operation unit. The robot is characterized by heavy loading ability, high velocity and high positioning accuracy. According to these characteristics, this work proposes a new scheme for the hybrid structure. The scheme can complete 5-DOF motion, which contains body rotation, clamp expansion, clamp lifting, clamp...
An energy saving control strategy that utilizing regenerative braking energy with on-board super capacitor (SC) is researched in the paper. The equivalent circuit model of the electrical train and the simplified model of the on-board SC are built. After modeling, the charge and discharge process of the SC is analyzed. Relating to the state of charge (SoC) of the SC, the energy consumption function...
Multiple-choice (MC) question is an important form of test to assess the students' academic achievement, especially in the e-learning applications. However, the classical evaluation metrics on MC questions (such as the correctness ratio) only consider the correctness of the final selection but ignore the solving progress of the testee. In the existing literature, the eye-tracking based visual attention...
Classroom observations have been widely used in education over the past couple of decades to measure effective teaching practice. The traditional observation methods rely on human observers, which are short of scalability and objectivity. In this paper, we implement a kind of automatic behavior measurement system, which utilizes the Microsoft Kinect devices to record the students' performance in classroom...
Deep Convolutional Neural Networks (CNNs) achieve substantial improvements in face detection in the wild. Classical CNN-based face detection methods simply stack successive layers of filters where an input sample should pass through all layers before reaching a face/non-face decision. Inspired by the fact that for face detection, filters in deeper layers can discriminate between difficult face/non-face...
This paper is concerned with sampled-data based reliable control for switched stochastic delay systems with actuator failures and nonlinear perturbations under asynchronous switching. By the multiple Lyapunov functional approach and the average dwell time technique, sufficient conditions are given to guarantee the mean-square exponential stability of switched stochastic delay systems with actuator...
The characteristics of four mainstream protocols including Ethernet/IP, Profinet, EtherCAT and Ethernet Powerlink in industrial field network are analyzed respectively in the paper. According to the different requirements of the on-site production line level control system and the internal network of the automation equipment, it is significant to adopt the appropriate network protocol. In the on-site...
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