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Microgrids rely on energy management levels to optimally schedule their components. Conventionally, the research in this field has been focused on the optimal formulation of the generation or the demand side management separately without considering real case scenarios and validated only by simulation. This paper presents the power scheduling of a real site microgrid under a price-based demand response...
A novel control strategy which enables proportional linear and nonlinear loads sharing among paralleled inverters and voltage harmonic suppression is proposed in this paper. The proposed method is based on the autonomous currents sharing controller (ACSC) instead of conventional power droop control to provide fast transient response, decoupling control and large stability margin. The current components...
In this paper, a virtual synchronous generator with photovoltaic energy storage hybrid system (VSG-PV) is adopted. VSG-PV can not only output the maximum power of photovoltaic, but also can maintain a stable voltage and frequency of the point of common coupling when system worked in the island model comparing to the conventional photovoltaic generation system. The small signal model of the hybrid...
Nonlinear loads connected to the microgrid distort the voltage of the Point of Common Coupling (PCC) and the grid current. Therefore, A droop control based harmonic voltage compensation strategy of voltage controlled inverter in islanded/grid-connected mode is proposed in this paper. To compensate the PCC voltage distortion, fundamental and harmonic voltage components are controlled separately in...
In this paper, an iterative receiver involving decoding, channel estimation and MIMO detection is proposed for underwater acoustic MIMO-OFDM communication systems. First, the bit-error rate (BER) performance of the iterative receiver for underwater acoustic 2IMO-OFDM and 4IMO-OFDM communication systems using the Kauai Acomms MURI 2011 (KAM11) experiment data sets under different system parameters...
How to effectively learn temporal variation of target appearance, to exclude the interference of cluttered background, while maintaining real-time response, is an essential problem of visual object tracking. Recently, Siamese networks have shown great potentials of matching based trackers in achieving balanced accuracy and beyond realtime speed. However, they still have a big gap to classification...
For solving the problems of modern intelligence algorithms such as slow convergence and low precision, a new algorithm based on bionics principle has been proposed which is inspired by the foraging behavior of seven-spot ladybirds in the nature. By analyzing the bionic principle of Seven-spot ladybird Optimization(SLO), we simulate the region search pattern of predation of seven-spot ladybirds, combining...
This research introduces a low-power, light-weight wearable powered waist exoskeleton with mechanical clutch. By processing the signals from multiple sensors, the human movement intention can be precisely identified and estimated. The exoskeleton can help reduce the work done by human muscle and has a loading capacity up to 20kg. Through the mechanical clutches applied, the exoskeleton can lock the...
The SGII-Up laser facility is one of the most important high power laser system in china. The maximum output of one beam is studied, and it is improved to 17600J from initial 5000J.
Speckle phenomenon in projected images is effectively reduced in a holographic projection display using the method of integration of negatively correlated images implemented by a phase-only spatial light modulator (SLM) with window partition.
This paper is devoted to the semiglobal finite-time stabilization via output-feedback for a class of high-order uncertain nonlinear systems. This problem can hardly be solved by the existing schemes, mainly since the systems under investigation contain unknown control coefficients which are dominated by the known functions of system states, and possess more serious nonlinearities which allow arbitrary-high-order...
In this paper, we propose an effective approach to estimating a near-surface lighting function from a limited number of images captured under different illuminations. Unlike classical methods relying on simplified parallel lighting model or near-point lighting model, our approach directly focuses on the much more realistic near-surface light source and formulates it as a regular grid of near-point...
Blur classification is an important and widely-studied problem in computer vision. State-of-the-art blur classification methods are designed and verified using man-made blur images of known blur types and blur kernels. In reality, natural blur occurs under wild-conditions, and thus cannot be simply simulated by several hand-crafted blur kernels. Hence, conventional blur classification methods cannot...
For MIMO nonlinear differential-algebraic equations (DAE) subsystem, the Backstepping stabilization control method is studied and the results are applied to the decentralized control of power system. The concept of vector relative order for MIMO nonlinear DAE subsystem is put forward. If the vector relative order exists, then the subsystem can be transformed equivalently by a diffeomorphism and a...
In utility computing models, users consume services based on their Quality of Service (QoS) requirements. QoS provides a basis for task scheduling, but it also makes task scheduling problems more complex. In this paper, we present a heuristic scheduling algorithm, named Budget-Deadline Constrained Workflow Scheduling (BDCWS). The algorithm calculates the task priority by a new method to balance the...
The performance of a frequency division duplexing (FDD) massive multiple input multiple output (MIMO) system is traditionally limited by the large amount of overhead for downlink channel training and uplink channel state information (CSI) feedback. In this paper, we propose an environment-aware scheme to exploit massive MIMO gains in the FDD mode. Under a quasi-static scattering geometry and slow...
Non-orthogonal multiple access (NOMA) is a promising technology for handling massive connectivity in future 5G wireless networks. Even though the spectral efficiency can be promoted, the transmission reliability is sometimes poor, due to the introduced multiple access interference (MAI), and the computational complexity for multiuser detection is usually high in NOMA. To solve this problem, we investigate...
Direct current (DC) power distribution has recently gained traction in buildings research due to the proliferation of on-site electricity generation and battery storage and an increasing prevalence of end uses operating internally on DC. The research discussed in this paper uses Modelica-based simulation to compare the efficiency of DC building power distribution with an equivalent alternating current...
Recommender system (RS) plays an important role in helping users find the information they are interested in and providing accurate personality recommendation. It has been found that among all the users, there are some user groups called “core users” or “information core” whose historical behavior data are more reliable, objective and positive for making recommendations. Finding the information core...
This paper aims at modeling and nonlinear control of two-wheeled self-balancing robots based on gyroscope effect. An MIMO nonlinear dynamic mode is presented by using Euler-Lagrange method and Maple software to describe the self-balancing robot. Then a dual input-output sliding mode controller is designed to analyze the nonlinear system, and a simulation experiment is achieved with MATLAB/SIMULINK...
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