Abstract Sensors and algorithms are two fundamental elements to construct intelligent systems. The recent progress in machine learning (ML) has produced great advancements systems, owing the powerful data analysis capability of ML algorithms. However, performance most systems is still hindered by sensing techniques that typically rely on rigid bulky sensor devices, which cannot conform irregularly curved dynamic surfaces for high‐quality acquisition. Skin‐like stretchable technology with...

As is known from visible-light experiments, silicon under femtosecond pulse irradiation can undergo so-called ``nonthermal melting'' if the density of electrons excited valence to conduction band overcomes a certain critical value. Such ultrafast transition induced by strong changes in atomic potential energy surface, which trigger relocation. However, heating material due electron-phonon coupling also lead phase transition, called ``thermal melting.'' This thermal melting occur even...

Quantum manipulation of mechanical resonators has been widely applied in fundamental physics and quantum information processing. Among them, cooling the system to its ground state is regarded as a key step. In this work, we propose scheme which one can realize ground-state resonator cavity magnomechanical system. The consists microwave small ferromagnetic sphere, phonon-magnon coupling photon-magnon be achieved via magnetostrictive interaction magnetic dipole interaction, respectively. After...

We reported a high-power pure Kerr-lens mode-locked Yb:CALYO laser based on the dual-confocal cavity delivering sub-100-fs pulses. The output pulses at 81 MHz have an average power of 10.4 W and pulse duration 98 fs, corresponding to peak 1.14 MW. This is, best our knowledge, highest ever for Yb-bulk oscillator. Analysis was also conducted, which indicates way achieve higher power. believe result described in this Letter may pave develop bulk lasers with much

Abstract Ti:sapphire laser has an important position in ultrashort pulse generation and wavelength tuning. The use of expensive frequency‐doubled diode‐pumped solid‐state as the pump source limits promotion its application to a certain extent. With maturity high‐power blue‐green diodes (LDs), low‐cost LD directly pumped becomes possible. After more than 10 years development, output parameters lasers have been greatly improved. Moreover, applied optical frequency combs, multiphoton microscopy...

Photoinduced diffraction grating is theoretically investigated in a three-level ladder-type hybrid artificial molecule comprised of semiconductor quantum dot (SQD) and metal nanoparticle (MNP). The SQD the MNP are coupled via Coulomb interaction. probe absorption vanishes under action strong coupling field, indicating an effect electromagnetically induced transparency (EIT). Based on this EIT effect, achievable when standing-wave field applied. It turns out that efficiency greatly improved...

We design and numerically investigate the high Q-factor, modulation depth, multiple Fano resonances based on a periodical all-dielectric asymmetric nanorod dimer in near-infrared regime. It is demonstrated that, due to excitation of subradiant hybrid modes, five sharp can be achieved by breaking symmetry flexibly tuned varying geometrical parameters. All have narrow line width, maximal Q-factor exceeds 9700, even minimal also reaches about 1090 magnitude. Particularly, depth reach nearly...

Abstract Using phonons to simulate an optical two-level laser action has been the focus of research. We theoretically study phonon in a cavity magnomechanical system, which consist microwave cavity, sphere magnetic material and uniform external bias field. This system can realize phonon-magnon coupling photon-magnon via magnetostrictive interaction dipole respectively, magnons are driven directly by strong field simultaneously. Frist, intensity driving reach threshold condition is given....

We investigate the generation of entanglement in a cavity magnomechanical system, which consists three modes: magnon mode, microwave mode and mechanical vibration couplings magnon-photon magnon-phonon are achieved by magnetic dipole interaction magnetostrictive interaction, respectively. By introducing squeezing entanglements significantly enhanced compared with case without inserting squeezing. find that an optimal parameter exists, yields maximum entanglement. This study provides new idea...

Pipeline risk assessment is crucial for pipeline safety management and operation. The aim of this study to develop a comprehensive model that accurately evaluates risks ensures the safe reliable operation system. based on multisource spatial data primarily applicable long-distance oil gas pipelines traverse complex geological conditions in mountainous areas. research conducted using example Jinliwen natural Zhejiang Province, China. By analyzing area potential may encounter, indicator system...

Buildings are important entity objects of cities, and the classification building shapes plays an indispensable role in cognition planning urban structure. In recent years, some deep learning methods have been proposed for recognizing footprints modern electronic maps. Furthermore, their performance depends on enough labeled samples each class footprints. However, it is impractical to label type footprint shapes. Therefore, using few more preferable recognize classify this paper, we propose...

The wind energy conversion system is a complex dynamic which contains multi‐coupling and multi‐time‐scales. commonly used simplified models are unable to uncover all the detailed dynamics. real‐time co‐simulation platform based on digital simulator GH Bladed built with controller hardware‐in‐loop, in kinematics equation of generator rotor as interface decouple different time scales, specific programmable logic build two‐way communication. effect signal delay between two simulation platforms...

Most accidents in a chemical process are caused by abnormal or deviations of the parameters, and existing research is focused on short-term prediction. When early warning time advanced, many false missing alarms will occur system, which cause certain problems for on-site personnel; how to ensure accuracy as much possible while technical problem requiring an urgent solution. In present work, bidirectional long memory network (BiLSTM) model was established according temporal variation...

We report on a 2-GHz high-power Kerr-lens mode-locked Yb:KGW laser pumped by single-mode fiber laser. The output performance for two different coupling rates was investigated. Stable bidirectional mode-locking operation at the repetition rate of 2.157 GHz obtained with 0.6% coupler. average powers are 741 mW and 746 mW, 123-fs 126-fs pulse durations, respectively. By using 1.6% coupler, unidirectional is achieved 145-fs duration 1.7-W power, which, to best our knowledge, highest power from...