Radar cross section (RCS) of ground planes can be reduced along the principal by utilizing electromagnetic bandgap (EBG) structures. Checkerboard surfaces, combining two different EBG structures each on a quadrant same plane, realize wide frequency bandwidth for 10-dB RCS reduction, because scattered fields from checkerboard surfaces are redirected toward four quadrants. This communication proposes dual-frequency band with reduction bandwidths 61% and 24% dual-band structures, while maintain...

This paper proposes a novel clustering and dynamic recognition–based auto-reservoir neural network (CDbARNN) for short-term load forecasting (STLF) of industrial park microgrids. In CDbARNN, the available sets are first decomposed into several clusters via K-means clustering. Then, by extracting characteristic information series input to CDbARNN curves belonging each cluster center, recognition technology is developed identify which belongs to. After that, it constitute high-dimensional...

The suppression of lift oscillation flow past a stationary circular cylinder is studied to delay structural fatigue at low Reynolds numbers in incompressible Newtonian fluid. Grad-based shape optimization employed achieve the goal. objective integral absolute value coefficient over vortex shedding period T. class-shape function transformation technique chosen as parameterization method. Moreover, unsteady adjoint method calculate gradients with respect parameters. Results show that through...

The cam tappet friction pair is one of the three major pairs in an internal combustion engine, and surface undergoes severe wear during operation. To improve resistance operation, this study, crescent-shaped micro-textures were prepared on material GCr15 steel by laser machining technique, effects orientation depth texture properties studied. processed test samples tested characterized tests, scanning electron microscopy (SEM), 3D morphometry, EDS. flow field simulation model micro-texture...

With the increasing penetration rate of renewable energy generation, uncertainty output in microgrid cluster (MGC) leads to significant fluctuations transaction volume, which may lead risk default. This paper proposes a day-ahead two layer trading model for based on price mechanism and Conditional value-at-risk (CVaR) theory. Firstly, upper-layer establishes an objective minimize overall power fluctuation using Demand response (DR) with penalty mechanism. The adopts internal pricing adjusts...

The properties of Electromagnetic Band-Gap (EBG) structures are used to alter the scattering fields by combining Perfect Electric Conductor (PEC) and EBG on same ground plane. Due anti-phase property, reflected energy can be re-directed toward four quadrants a null appear normal direction. To increase bandwidth, checkerboard surfaces different plane proposed. Two configurations designed realize 180° phase difference, in order achieve wider band Radar Cross Section (RCS) reduction. RCS...

It is the vital significance for strong and smart grid that big data analytics technologies apply in power system. The multi-source heterogeneous integration technology based on platform one of indispensable content. As there are problems heterogeneity islands dispatching control system, a model proposed analytics. This exists layer can improve Extract-Transform-Load (ETL) process according to extracting rules transform rules, which made by uniform panoramic Research shows integrating...

Solar photovoltaic power generation has the characteristics of intermittence and randomness, which makes it a challenge to accurately predict solar power, is difficult achieve desired effect. Therefore, by fully considering relationship between data climate factors, new prediction method proposed based on sliced bidirectional long short term memory attention mechanism. The results show that presented model higher accuracy than common models multi-layer perceptron, convolution neural network,...

A feature-based image mosaic method is introduced in this paper. Fast has been realized by using the Harris arithmetic operators to withdraw vertex features, Local Area Correlation Coefficient (LACC) match characteristic, and overlap area linear transition fuse images eliminate obvious edge seam. The experiment proved that stitching effect perfect.

Under a two-part tariff, the user-side installation of photovoltaic and energy storage systems can simultaneously lower electricity charge demand charge. How to plan capacity location against backdrop fully installed system is critical element in determining economic benefits users. In view this, we propose an optimal configuration for multi-transformer-integrated industrial park microgrid. First, objective function planning built with income cost whole life cycle as core elements. This...

Aiming at high accuracy of dissolved gas content prediction in transformer oil, a novel method based on gated recurrent unit and adaptive graph convolution network (GRU-AGCN) is proposed. For (GRU) can selectively choose the feature time series, it used to extract series information content. Correlation among gases are extracted improve accuracy. The original adjacency matrix model constructed according grey relational analysis (GRA), dynamic relation between by (AGCN). experimental result...

The computational cost of unsteady adjoint equations remains high in adjoint-based aerodynamic optimization. In this letter, the solution is accelerated by dynamic mode decomposition (DMD). pseudo-time marching every real-time step approximated as an infinite-dimensional linear dynamical system. Thereafter, DMD utilized to analyze vectors sampled from these marching. First-order zero frequency selected accelerate step. Through flow past a stationary circular cylinder and shape optimization...

Photon correlator is kernel component of Correlation Spectroscopy particle sizing instrumentation, which must calculate autocorrelation function in real time. The correlation processing can be carried out by hardware or software. Hardware implemented with photon has good real-time ability, but the cost for resource pretty high. Software comparably cheap not competent processing. and software architecture analyzed, a novel least taking advantage fast speed FPGA devices vast memory space...

The recently published joint demosaicking and zooming algorithms for single-sensor digital cameras all overfit the popular Kodak test images, which have been found to higher spectral correlation than typical color images. Their performance perhaps significantly degrades on other datasets, such as McMaster weak correlation. A new algorithm is proposed Bayer filter array (CFA) pattern, in edge direction information (edge map) extracted from raw CFA data consistently used zooming. It also...

The reflection variation property of Electromagnetic Band-Gap (EBG) structures can be utilized to reduce the Radar Cross Section (RCS) ground planes. Combining PEC and EBG on same plane forms checkerboard surfaces which achieve a RCS reduction in narrow frequency band. However, wider band realized by combining two different structures. It realize 60% bandwidth for 10-dB reduction. scattered fields square are re-directed toward four quadrants, while scattering hexagonal six directions. maxima...