Abstract Numerical optimization, Unmanned Aerial Vehicle (UAV) path planning, and engineering design problems are fundamental to the development of artificial intelligence. Traditional methods show limitations in dealing with these complex nonlinear models. To address challenges, swarm intelligence algorithm is introduced as a metaheuristic method effectively implemented. However, existing technology exhibits drawbacks such slow convergence speed, low precision, poor robustness. In this...

Simultaneous electrocatalytic reduction and oxidation of 5-hydroxymethylfurfural (HMF) is crucial for biomass refineries. Herein, we report the unprecedentedly high efficiency nearly complete conversion biomass-derived HMF to value-added products, achieving >95% selectivity at −0.4 V vs RHE by pairing (PERO) reactions in a single electrochemical cell. At cathode, achieved 99% 2,5-dihydroxymethylfuran (DHMF) ∼99% yield under mild conditions using PtRu alloy. anode, observed HMF, perfect...

A distribution state estimator (DSE) based on the weighted-least-square approach and three-phase modeling techniques is presented in this paper. The model required to formulate developed. Customer load estimates real-time measurements are modeled as expected values with errors. Particularly, paper introduces concept of stochastic results DSE has a detailed analysis. Test examples used for demonstrating capabilities DSE. influence measurement placement accuracy estimated discussed. Other...

Safety problem is always a big obstacle for lithium battery marching to large scale application. However, the knowledge on combustion behavior limited. To investigate of battery, three 50 Ah Li(NixCoyMnz)O2/Li4Ti5O12 batteries under different state charge (SOC) were heated fire. The flame size variation depicted analyze directly. mass loss rate, temperature and heat release rate are used in reaction way deeply. Based phenomenon, process divided into basic stages, even more complicated at...

Color centers in silicon carbide have increasingly attracted attention recent years owing to their excellent properties such as single photon emission, good photostability, and long spin coherence time even at room temperature. As compared diamond which is widely used for holding Nitrogen-vacancy centers, SiC has the advantage terms of large-scale, high-quality low cost growth, well advanced fabrication technique optoelectronics, leading prospects large scale quantum engineering. In this...

Lithium-ion (Li-ion) batteries endure substantial energy loss and power recession under cold environments, requiring to be heated before starting normal operations in electric vehicles (EVs). Currently, many internal ac heating approaches powered by have been proposed achieve a fast speed, high efficiency, good uniformity. However, due the bulky size, cost, low frequency, existing devices are generally improper for EV applications. In light of this, compact high-frequency heater is this...

Gallium nitride high-electron-mobility transistors (GaN-HEMTs) suffer from trapping effects that increases device on-state resistance (RDS(on)) above its theoretical value. This increase is a function of the applied dc bias when in off state, and time which biased for. Thus, dynamic RDS(on) different commercial GaN-HEMTs are characterised at voltages paper by proposed new measurement circuit. The time-constants associated with detrapping extracted using circuit it shown variations can be...

In recent years, researchers have been attracted to the application of wide-bandgap (WBG) power semiconductor devices such as silicon carbide (SiC) and gallium nitride (GaN) in electric vehicle (EV) applications. Their advantages over Si semiconductors are lower losses, higher switching frequencies, junction temperatures. Thus, using WBG for EV electronic systems improves efficiency, reliability, mileage; however, these adoptions still under challenges terms packaging converters design. this...

The remaining useful life (RUL) prediction is critical for the safe and reliable operation of lithium-ion battery (LIB) systems, which characterizes aging status provides early warning replacement. Most existing RUL methods rely on empirical models, role mechanism not considered in subsequent algorithm settings. accuracy stability data-driven algorithms are severely limited by data. A new electrochemical-model-based particle filter (PF) framework LIB proposed this paper. Parameters a...

This paper focuses on no-insulation (NI) HTS pancake coils with iron core for superconducting dc induction heaters. A coil without turn-to-turn insulation and its conventional counterpart are wound YBCO-coated tapes. An is built a laboratory-scale heater. The electromagnetic characteristics of the two studied focusing charging sudden-discharging processes at 77 K. Three variables measured, i.e., current, terminal voltage, magnetic field induced. results show that NI incurs significant delay...

Quantum sensors with solid state electron spins have attracted considerable interest due to their nanoscale spatial resolution.A critical requirement is suppress the environment noise of spin sensor.Here we demonstrate a thermometer based on silicon carbide (SiC) spins.We experimentally that performance sensor robust against dephasing self protected machenism. The SiC thermometry may provide promising platform for sensing in noisy ,e.g. biological system sensing.

Open AccessCCS ChemistryCOMMUNICATION1 Apr 2022Abundant Production of Reactive Water Radical Cations under Ambient Conditions Meng Wang†, Xiao-Fei Gao†, Rui Su, Peng He, Yuan-Yuan Cheng, Ke Li, Dongbo Mi, Xiaoping Zhang, Xinglei Huanwen Chen and R. Graham Cooks Wang† Jiangxi Key Laboratory for Mass Spectrometry Instrumentation, East China University Technology, Nanchang 330013 , Gao† Su State Inorganic Synthesis Preparative Chemistry, College Jilin University, Changchun 130012 He Cheng Li Mi...

All-solid-state lithium metal batteries hold promise for meeting the industrial demands high energy density and safety. However, voids are formed at anode/solid-state electrolyte interface during stripping, deteriorating contact reducing cycle stability. Stack pressure operating temperature effective methods to activate creep deformation in metal, promoting interfacial alleviating void-induced issues. Nevertheless, we lack a clear understanding of how stack affect void evolution via effect,...

As software systems become more complex and configurable, performance problems tend to arise from the configuration designs. This has caused some options unexpectedly degrade which deviates their original expectations designed by developers. Such discrepancies, namely bugs (CPBugs), are devastating can be deeply hidden in source code. Yet, efficiently testing CPBugs is difficult, not only due test oracle hard set, but also because measurement expensive there simply too many possible...

In this letter, a broadband low-profile dual circularly polarized reflectarray (dual-CP RA) for Ku-band satellite communications is proposed. A novel single-layer metasurface unit cell consisting of functional layer, an air layer and metal plate investigated first. The structure printed on the F4B substrate. can effectively extend bandwidth, overall profile only 0.12λ0, where λ0 represents wavelength at 11.725 GHz. To independently control phase left-handed (LHCP) right-handed (RHCP) waves,...

This research proposes a novel adaptive virtual synchronous generator (VSG) control strategy for photovoltaic-energy storage (PV-storage) hybrid system. In comparison to the traditional VSG approach, presented in this markedly diminishes fluctuations output power. improvement is accomplished through dynamic adjustment of inertia (J) and damping coefficient (D), which enables real-time responsiveness variations light intensity, converter power, load power factors that controls are unable...

The free piston engine (FPE), as an alternative of the conventional internal combustion engine, could significantly impact energy consumption and emissions both on-highway off-highway vehicles. In FPE, motion is dependent on chamber gas dynamics loading in real time. One technical barriers that prevents wide spread this technology lack precise control. paper, we present modeling control a hydraulic FPE with opposed-piston opposed-cylinder design. Specifically, comprehensive system model...

Integration of decoupling capacitors into silicon carbide (SiC) metal oxide semiconductor field effect transistor ( <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mosfet</small> ) modules is an advanced solution to mitigate the parasitic inductance induced by module assembly interconnects. In this paper, switching transient behavior reported for a 1.2-kV SiC with embedded dc-link capacitors. It shows faster transition and less overshoot voltage...

The conventional photoacoustic microscopy (PAM) system allows trade-offs between lateral resolution and imaging depth, limiting its applications in biological vivo. Here we present an integrated optical-resolution (OR) acoustic-resolution (AR) multiscale PAM based on free-space light transmission fast microelectromechanical systems (MEMS) scanning. for OR is 4.9 µm, the AR 114.5 µm. maximum depth 0.7 mm, 4.1 mm. speed can reach 50 k Alines per second. high signal-to-noise ratios wavelength...