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To handle the mismatch problem between local demand and local generation in microgrids (MGs), the paradigm of peer-to-peer (P2P) energy sharing among neighboring MGs has been considered as a promising solution for improving the utilization of local distributed energy resources and saving the energy bills for all MGs. Existing works on cooperative MGs usually consider the high-level energy sharing...
Non-orthogonal multiple access (NOMA) is a promising candidate for 5G networks. NOMA achieves superior spectral efficiency than conventional orthogonal multiple access (OMA), as in NOMA multiple users can use the same time and frequency resources. Multiple-Input-multiple-output is a promising technique that can enhance system performance. In this paper we present a multiple antenna based NOMA, known...
Material characteristics, environmental conditions and loading characteristics under the time domain features shall be taken into consideration so as to effectively evaluate the reliability of ship grillage structure. Moreover, the method of time-variant reliability serves as an effective approach to solve the problem. In the paper, based on the loading environmental features of ships during the enlistment,...
This paper implements a visual tool for the quick customization of virtual characters in 3D virtual worlds with a three-layer structure based on the Open Sim and Second Life platforms and "Knowledge" theory. "Knowledge" refers to specific controlling conditions and the corresponding behaviors of virtual characters. The three-layer structure is divided into the data layer, entity...
Enhancement of optical efficiency in red/green light in white OLED display were studied with quantum dot (QD) based color-converting layer and long-pass reflectors (LPR) to recycle unnecessary light and down-convert to necessary light. From experimental results, the optical power after passing through the QD film and LPR was enhanced by 51.8% and 20.2% in red/green, respectively. In addition, the...
In the intra coding of HEVC/H.265, the computational complexity of intra mode decision is very high because up to 35 intra prediction modes are supported. Though a fast intra mode decision based on rough mode decision (RMD) is adopted in reference software HM12.0, only a fixed number of intra modes are selected for rate distortion optimization (RDO). In this paper, an adaptive fast intra mode decision...
Plug-in electrical vehicles will play a critical role in future smart grid and sudden connection of electrical vehicles chargers may cause huge power-peaks with high slew-rates on grid. In order to cope with this issue, this paper applies a distributed cooperative control for fast charging station with dedicated paralleled flywheel-based energy storage system. The distributed DC-bus signaling method...
The identification of Web servers has great significance for assessing security of Web system, researching market share and forecasting the scope of influence on a network security incident. This paper introduces the principle of the Web server detection technology based on HTTP, and analyzes how to identify Web servers from aspects of the Banner information, HTTP response characteristics and special...
Social networks is a virtual communities and networking platform, where people can create and share views, ideas and experiences freely. Social networks like the real world, filled with colorful crowd. How to use user behavior attributes, basic information, and interactive content in social media to classify users has become a hot topic in the field of social network analysis. In this paper, we present...
Application layer Distributed Denial of Service (DDoS) attacks, which are legitimate in packets and protocols, gradually become a pressing problem to the current network. How to effectively resist this type of attack is becoming even more challenging with the vast resources and techniques increasingly available to attackers. This paper studies the existing application layer DDoS attacks and provides...
Gradient domain optimization is widely used in regularized image super-resolution, in which the gradient of high resolution (HR) is estimated for calculating the regularization energy. In this paper, a progressive gradient estimation (PGE) is proposed. In PGE, the gradient of the reconstructed HR image in the previous round of optimization is taken as the estimated gradient in the current round. Then,...
We reported a new low-frequency active vibration isolation system called by compound pendulum which is mainly composed of a pair of two-dimensional elastic reeds and two pendulums. The response to the ground horizontal and tilt vibration of the compound pendulum is investigated. The simulations show that the compound pendulum is not only sensitive to low-frequency tilt vibration but also restrains...
Taking the 300 tons of supersized hydraulic excavators as the object of study, time-varying large inertia slewing system with pressure closed-loop control is designed and its working principle is illustrated. A mechanical electrical and hydraulic joint simulation model is established using AMESIM and ADAMS. This paper studies the influence of the position change of working device on the moment of...
Collaborative filtering recommendation algorithm has become a common way to deal with the problem of information overload, which hinders consumers to make appropriate decisions and firms to provide the items that consumers really interest in. Traditional collaborative method is basing on consumers' rating on the items, hence, their performance suffers from data sparsity and cold-start. In this paper,...
Electrical vehicle (EV) chargers are going to occupy a considerable portion of total energy consumption in the future smart grid. Fast charging stations (FCS), as the most demanding representatives of charging infrastructure, will be requested to provide some ancillary services to the power system in order to support basic electrical operation. This paper proposes a local implementation of a hysteresis-based...
Visual tracking is one of the most important applications in computer vision. Since the tracking process can be formed as a dynamic optimization problem. PSO, an effective algorithm to solve optimization problem, has been used in tracking widely. However, it has been proved that the traditional PSO is easy to converge to local optimum. In this paper, we adopt quantum-behaved particle swarm optimization...
Modern web users are exposed to a browser security threat called drive-by-download attacks that occur by simply visiting a malicious Uniform Resource Locator (URL) that embeds code to exploit web browser vulnerabilities. Many web users tend to click such URLs without considering the underlying threats. URL blacklists are an effective countermeasure to such browser-targeted attacks. URLs are frequently...
This paper presents an improved deadbeat current control strategy based on repetitive predictor applied to D-STATCOM for reactive power compensation. The deadbeat algorithm is used to design the current loop in α-β stationary frame. A repetitive controller is added in the compensating current prediction to reduce prediction error and enhance the accuracy of control. Since the grid frequency variation...
With the rapid penetration of photovoltaic (PV) grid-connected system in industrial and commercial application, it is critical to improve the efficiency and enhance the utilization of PV power generation system. This paper proposes a flexible five-level topology based on cascaded multi-level inverter for PV grid-connected system. By adding a bidirectional switch to conventional multi-level inverter,...
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