The energy crisis and increasing concerns about the environment in modern society have fostered development of integrated system (IES) smart grid. hub (EH) is a minimum construction IES. chief purpose this paper to propose Lyapunov optimization-based management strategy for with an router. First, describes configuration EH router sets basic operating principles Second, method proposed analyze balance equations EH. Furthermore, problem formulated considering constraints equations, storage,...

Distributed photovoltaic (PV) generation systems are crucial for the utilization of renewable energy sources. Grid guidelines require that grid-connected convertors must have low-voltage ride-through (LVRT) capability. For two-stage PV convertors, input and output power imbalance during LVRT can result DC bus voltage fluctuations, which seriously lead to failure. To solve this problem, crowbar circuit or storage devices commonly used, but both solutions disadvantages, such as high losses low...

Accurate and efficient tree species classification mapping is crucial for forest management conservation, especially on the Loess Plateau, where quality urgently needs improvement. This study selected three research sites—Yongshou (YS), Zhengning (ZN), Yanchang (YC)—on Plateau classified main using RGB images acquired by an unmanned aerial vehicle (UAV). The were normalized, vegetation indices (VIs) extracted. Feature selection was performed Boruta algorithm. Two classifiers, Support Vector...

In a wireless power transfer (WPT) system, not only the mutual inductance variation but also self-inductance can occur under misalignment condition. light of unmanned aerial vehicles (UAVs), secondary and are significant order to stabilize output voltage current achieve near-zero phase angle (near-ZPA) input impedance, variable inductor control is presented in this article, which regulates side by adjusting dc bias large <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Fasting is a simple metabolic strategy that used to estimate the maintenance energy requirement where supply for basic physiological functions provided by mobilization of body reserves. However, underlying components expenditure are not clear. This study investigated differences in heat production (HP), respiratory quotient (RQ) and plasma metabolites pigs fed fasted state, using techniques indirect calorimetry metabolomics. Nine barrows (45.2 ± 1.7 kg BW) were corn-soybean based meal diets...

This study aims to establish a deep learning-based classification framework efficiently and rapidly distinguish between coniferous broadleaf forests across the Loess Plateau. By integrating residual neural network (ResNet) architecture with transfer learning techniques multispectral data from unmanned aerial vehicles (UAVs) Landsat remote sensing data, effectiveness of was validated through well-designed experiments. The began by selecting optimal spectral band combinations, using random...

pH-sensitive copolymers have been widely introduced to achieve rapid dewatering and consolidation of solids in mining oil sands processing wastes. But no more attention has given the flocculation efficiency solid suspensions as a function pH using copolymer. In this study, copolymer was synthesized employed investigate behaviors kaolin by focused beam reflectance measurement (FBRM). A titration test characterize conformation transition. The results demonstrated that at ranging from 3 6, with...

In Asia, the pine sawyer beetle Monochamus alternatus Hope (Coleoptera: Cerambycidae) is most important vector of pinewood nematode Bursaphelenchus xylophilus Steiner and Buhrer (Aphelenchida: Parasitaphelenchidae), causal agent wilt disease, ectoparasitoid Scleroderma guani Xiao et Wu (Hymenoptera: Bethylidae) natural enemy this pest. Efficient host location critical to parasitoid fitness, chemical cues are key factors guiding searching process. This study was conducted elucidate odor in S....

Energy router based on power electronics technology is the key equipment to build Internet and realize flexible transformation of operation control DGs. In this paper, a cascade structure household energy circuit applied, which former converter can achieve bi-directional flow, DC link realizes access DGs, storage plug play, latter supply for AC loads as well connect grid. The mathematical model established respectively, coordinated strategy are proposed, distribution characteristics...

Loop closing operation of distribution network is necessary to realize load transfer without power supply, but it may generate large loop current and lead failure. In order minimize the impact on transfer, a control strategy proposed solve problem voltage overrun by adjusting current, taking into account change electrical quantity in after accessing distributed generator (DG), which will success closing. By analyzing generation mechanism influencing factors process, quantities affecting...

Fruit information perception and nondestructive picking method are the key technologies for harvesting robot. In this paper, kiwifruit automatic identification end-effector were studied. Firstly, a of obtaining image from bottom fruit was proposed based on clustering characteristics elliptic Hough transform used to make target be recognized separately in procession determine order fruit. Secondly, an designed manufactured, which could approach bottom, enveloping grabbing two sides, rotated...

The monocular vision-based system can obtain the leaf wall area characterizing canopy parameter for online detection and real-time variable spraying, aiming to improve accuracy of orchard spraying equipment utilization efficiency pesticide. This study established a system, in which parameters were collected by vision, spray volume decision coefficient was constructed L* value International Commission on Illumination Lab color space control duty cycle each solenoid valve achieve spraying....

When rotor and supercapacitor cooperate to solve the low voltage ride-through, difficultly real time responds wind fluctuation with inertia increasing. The speed change lags behind mismatches, resulting in DC fluctuation. To this problem, a model predictive control using frequency division droop is proposed. power of controlled by MPC maintain stability. Through virtual impedance control, unloading resistor absorbs high power, effectively eliminating voltage. reduced cost function speed....

Norse mythology is an ancient and profound mythological system with high artistic value cultural significance. Digital illustration design carries on the stories images of culture through expression images, allowing people to better understand know culture, morals mythology. Through diverse styles techniques, digital innovatively represents making them more vivid, interesting appealing. Using monsters as main vehicle, this set designs combines some simplicity style. four one ‘Twilight Gods’,...