Wind power generation accounts for an increasing proportion of the grid, so efficient and accurate real-time wind prediction is particularly important grid. In view strong randomness fluctuation difficulty predicting power, a Salp Swarm Algorithms-Extremely Learning Machine (SSA-ELM) based ultra-short-term model proposed. this case, multi-input sample set composed historical speed, temperature, direction, atmospheric pressure other climatic factors that are highly correlated with network...

Lemon essential oil was used as plasticizers to prepare iron yam/maize starch edible films. Changes of physical, microcosmic and antimicrobial properties films were studied. Results showed that the addition lemon led decrease moisture content, transparency, whiteness index, water vapor permeability, solubility tensile strength increase b*, elongation haze values. With antibacterial activity increased, surface internal microstructure film became more heterogeneous. Compared with control...

In this work, we propose a high-efficiency terahertz (THz) wave-generation approach by cascaded difference frequency generation (CDFG) with an aperiodically poled lithium niobate (APPLN) crystal at cryogenic temperature. The APPLN desirable poling periods along the length determines phase mismatches of each-order CDFG, resulting in decrement Stokes processes and increment anti-Stokes simultaneously. This is contrast previous works on where THz wave was generated irreversible processes....

In this paper, microwave scan inspection was employed to detect the lack of fusion defect existing in thermal welds high-density polyethylene (HDPE) piping. The without defects were firstly inspected by technique. obtained interference pattern and image produced taken as evaluation standard. Then containing under different welding conditions inspected, corresponding images recorded. problems occurring processes that lead can be distinguished analyzing images. Mechanical tests performed...

A microwave hybrid heating method was used for the synthesis of Cr2AlC powder using two carbon sources graphite and Cr3C2, tribological behaviour powders investigated. The purity is sensitive to temperature starting materials used. For a Cr/Al/C system, with small amount Cr7C3 synthesised at 1100°C 3 min. Cr/Al/Cr3C2 high synthesized 1050°C Ultrafine grain diameter less than 500 nm (denoted by u-Cr2AlC) could be prepared ball-milling ultrasonic treatment. properties as-synthesised ultrafine...

A novel hyperspectral classification algorithm based on spectral-spatial feature extraction is proposed. First, features are extracted by Gabor transform in PCA-projected space. Following that, Gabor-feature bands partitioned into multiple subsets. Afterwards, the adjacent each subset fused. Finally, fused processed recursive filtering before feeding support vector machine (SVM) classifier. Experimental results demonstrate that proposed substantially outperforms traditional and...

The optical control ability of photonic crystal fiber (PCF) is a distinctive property suitable for improving sensing and plasma performance. This article proposes dual-core D-channel PCF sensor that can detect two samples simultaneously, which effectively solves the problems coating difficulty low wavelength sensitivity. has four layers air holes, dramatically reduces loss more conducive to application sensors in actual production. In addition, by introducing dual cores on upper lower sides...

In the present study an innovative tissue engineering scaffold was developed which can be used on wound dressing with a controllable drug-releasing capability. By coaxial electrospinning nanofibrous mats were obtained made from Poly(L-lactid-co-ε-caprolactone) (PLLACL) and Tetracycline Hydrochloride (TCH), P(LLA-CL) as shell TCH core. The release behavior of measured by ultraviolet-visible (UV-vis) spectroscopy in vitro environment 37°C for maximum 180 hours. To compare method mix...

Traditional methods for hyperspectral image classification typically use raw spectral signatures without considering spatial characteristics. In this work, a algorithm based on Gabor features and decision fusion is proposed. First, the adjacent high correlated bands are intelligently grouped by coefficient correlation matrix. Following that, in each group extracted PCA-projected subspaces to quantify local orientation scale Afterwards, locality-preserving non-negative matrix factorization...

This paper gives an introduction to the synthetic methods of gold nanoparticles, such as reduction method, template method and seed growth method. The technique includes green reduction, organic small molecules In addition, applications nanoparticles in nanoprobes, drug delivery systems, photonic crystals, etc. are discussed, outlook for is also made.

A novel photonic crystal fiber (PCF) sensor with three D-shaped holes based on surface plasmon resonance (SPR) is analyzed in this paper. Three are filled the analyte, and gold film deposited side of planes. The design outward expansion can effectively solve uniformity problem metallized nano-coating, it beneficial to filling analyte convenient for real-time measurement analyte. Compared hexagonal lattice structure, triangular arrangement clad air significantly reduce transmission loss light...

Accurate identification of individual cow identity is a prerequisite for the construction digital farms and serves as basis optimized feeding, disease prevention control, breed improvement, product quality traceability. Currently, faces challenges such poor recognition accuracy, large data volumes, weak model generalization ability, low speed. Therefore, this paper proposes method based on YOLOX-S-TKECB. (1) Based characteristics Holstein cows their breeding practices, we constructed...

In the present paper, an effective method for detecting cold weld defects in thermal fusion of high-density polyethylene (HDPE) pipelines based on microwave technique is proposed. Using a testing system, HDPE piping welds containing caused by insufficient heating time were examined frequency sweep within range 9.2-9.9 GHz. At frequencies that most sensitive to defects, measured reflection coefficient S 11 showed greatly different values between good and those defects. The readily detectable...

We present a theoretical investigation on simultaneous generation of two pairs Stokes and terahertz (THz) waves from coupled optical parametric oscillations (OPOs) with quasi-phase-matching (QPM) scheme. The THz are generated by stimulated polariton scattering (SPS) periodically-inverted GaP. By analyzing the QPM conditions OPOs we find that any frequency below transverse (TO) mode GaP can be simultaneously suitable pump wavelength. calculate photon flux densities solving wave equations....

Abstract A novel method is presented for the synthesis of Ti 2 SC powder by heating FeS /Ti/TiC mixtures. The phase evolution was explored in detail with X-ray diffraction, thermo-gravimetry/differential scanning calorimetry, and electron microscopy analysis. It found that began to decompose into activated released molecular state sulphur at around 500 °C. Subsequently, underwent a reaction formed Fe TiS 700 Finally, both TiC form could be triggered 900 confirmed obtained only trace impurity...

A new scheme which generates multi-frequency terahertz (THz) waves from planar waveguide by the optimized cascaded difference frequency generation (OCDFG) is proposed. THz wave with ω T1 generated OCDFG two infrared pump waves, and simultaneously a series of optical interval generated. The M -times mixing m -th-order ( + )-th-order wave. phase mismatch distributions (CDFG) are modulated changing thickness step step, thereby satisfying phase-matching condition first-order to high-order Stokes...

The characteristics of a photonic crystal fiber sensor with reuleaux triangle are studied by using the finite element method. wavelength sensitivity designed optical is related to arc radius triangle. Whether core area solid or liquid as well refractive index contributes sensitivity. simulation results show that larger leads higher can be improved introducing core, and achieved lower core. In addition, specific channel plated gold film polished then analyte deposited on surface, in which...

A novel scheme for high-efficiency terahertz (THz) wave generation based on optimized cascaded difference frequency (OCDFG) with planar waveguide is presented. The phase mismatches of each-order (CDFG) are modulated by changing the thickness waveguide, resulting in a decrement Stokes processes and an increment anti-Stokes simultaneously. enhance suppress simultaneously, yielding energy conversion efficiencies over 25% from optical to THz at 100 K.

In this paper, an effective method for detecting the cold weld defects in thermal fusion of high-density polyethylene (HDPE) pipeline based on microwave technique is proposed. Using a testing system, HDPE piping welds were examined proper position by frequency sweep within range 9.3-9.9 GHz. At that was most sensitive to defects, measured reflection coefficient S 11 exhibited significantly different values between good and those containing defects. The readily detectable differences value...