A5103178710- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Microwave Engineering and Waveguides
- Antenna Design and Analysis
- Agriculture, Soil, Plant Science
- Remote Sensing and Land Use
- Korean Urban and Social Studies
- Electromagnetic Compatibility and Noise Suppression
- Millimeter-Wave Propagation and Modeling
- Advanced optical system design
- Statistical and Computational Modeling
- Robotics and Automated Systems
- Calcium Carbonate Crystallization and Inhibition
- Magnetic and Electromagnetic Effects
- Composite Material Mechanics
- 3D IC and TSV technologies
- Microwave Dielectric Ceramics Synthesis
- Advanced Optical Imaging Technologies
- Advancements in Photolithography Techniques
- Wind Turbine Control Systems
- Software Engineering Research
- Hydraulic Fracturing and Reservoir Analysis
- Image and Object Detection Techniques
Changzhou University
2025
Nantong University
2018-2024
Yuanpei University
2024
Yunnan University
2023
Chinese Academy of Sciences
2019-2022
University of Chinese Academy of Sciences
2019-2022
Institute of High Energy Physics
2019-2022
Southwest Jiaotong University
2022
China Electronics Technology Group Corporation
2017-2020
We introduce our first-generation reasoning models, DeepSeek-R1-Zero and DeepSeek-R1. DeepSeek-R1-Zero, a model trained via large-scale reinforcement learning (RL) without supervised fine-tuning (SFT) as preliminary step, demonstrates remarkable capabilities. Through RL, naturally emerges with numerous powerful intriguing behaviors. However, it encounters challenges such poor readability, language mixing. To address these issues further enhance performance, we DeepSeek-R1, which incorporates...
We present DeepSeek-V3, a strong Mixture-of-Experts (MoE) language model with 671B total parameters 37B activated for each token. To achieve efficient inference and cost-effective training, DeepSeek-V3 adopts Multi-head Latent Attention (MLA) DeepSeekMoE architectures, which were thoroughly validated in DeepSeek-V2. Furthermore, pioneers an auxiliary-loss-free strategy load balancing sets multi-token prediction training objective stronger performance. pre-train on 14.8 trillion diverse...
Abstract Fast radio bursts (FRBs) are short pulses observed in band from cosmological distances, some of which emit repeating bursts. The physical origins these mysterious events have been subject to wide speculations and heated debates. One class models invoke soft gamma-ray repeaters (SGRs), or magnetars, as the sources FRBs. Magnetars rotating neutron stars with extremely strong magnetic field can sporadically X-ray (keV) (sub-MeV) duration 102 s 102 s. However, even though bright no...
We study the evolution of temporal properties MAXI 1820+070 during 2018 outburst in its hard state from MJD 58190 to 58289 with Insight-HXMT a broad energy band 1-150 keV. find different behaviors hardness ratio, fractional rms and time lag before after 58257, suggesting transition occurred at around this point. The observed lags between soft photons 1-5 keV higher bands, up 150 keV, are frequency-dependent: low-frequency range, 2-10 mHz, both timescale dozens seconds but without clear trend...
No robust detection of prompt electromagnetic counterparts to fast radio bursts (FRBs) has yet been obtained, in spite several multi-wavelength searches carried out so far. Specifically, X/gamma-ray are predicted by some models. We planned on searching for gamma-ray the Insight-Hard X-ray Modulation Telescope (Insight-HXMT) data, taking advantage unique combination large effective area keV-MeV energy range and sub-ms time resolution. selected 39 FRBs that were promptly visible from...
This study aims to develop an analytical framework for selecting form design, configuration, and optical properties, focusing primarily on chromatic aberration in additional glass lens. Optimization employs the L9 orthogonal array from Taguchi methodology, combined with IBM SPSS Statistics, compute principal component characteristic values determine vector coefficient matrix of PCA. method ensures high-precision experimental outcomes minimal design iterations, facilitating identification...
In recent years, the problem of Cd (cadmium) contamination in cultivated soils has grown worse, endangering food security and human health impeding agricultural sustainability. The application foliar fertilizer can effectively prevent control accumulation crops, but related effects on wheat risk to are not clear. On Cd-polluted farmland, five fertilizers (multi-element compound (Me), manganese-zinc micro-fertilizer (MZ), sodium dihydrogen phosphate (P), water-soluble organic (WO) silicon...
We report the energy-resolved broadband timing analysis of black hole X-ray transient MAXI J1631-479 during its 2019 outburst from February 11 to April 9, using data Insight-Hard Modulation Telescope (Insight-HXMT), which caught source hard intermediate state soft state. Thanks large effective area Insight-HXMT at high energies, we are able present energy dependence fast variability up ~100 keV. Type-C quasi-periodic oscillations (QPOs) with frequency varying between 4.9 Hz and 6.5 observed...
Here we present a detailed study of the broadband noise in power density spectra black hole X-ray binary MAXI J1820+070 during hard state its 2018 outburst, using Hard Modulation Telescope (Insight-HXMT) observations. The shows two main humps, which might separately correspond to variability from variable disk and Comptonization regions. We fitted humps with multiple Lorentzian functions studied energy-dependent properties each component up 100--150 keV their evolution spectral changes....
The fast transitions between different types of quasi-periodic oscillations (QPOs) are generally observed in black hole transient sources (BHTs). We present a detailed study on the timing and spectral properties type-B QPOs MAXI~J1348--630, by \emph{Insight}-HXMT. fractional rms variability--energy relationship energy spectra reveal that probably originate from jet precession. Compared to weak power-law dominated power spectrum, when QPO is present, corresponding spectrum shows an increase...
Abstract We performed the broadband (1–100 keV) spectral analysis of first Galactic Be ultraluminous X-ray pulsar (BeULX) Swift J0243.6+6124 observed by Insight-HXMT during 2017−2018 outburst. The results show transitions at two typical luminosities, roughly consistently with those reported previously via pure timing analysis. find that spectrum evolves and becomes softer has higher cutoff energies until luminosity reaches L 1 (∼1.5 × 10 38 erg s −1 ). Afterwards harder lower increases to 2...
A millimeter-wave (mm-wave) end-fire substrate integrated dielectric resonator antenna (EFSIDRA) is proposed to provide dual-beam radiation. The radiation caused by the multilayer rectangular (DR) with metallic walls on both sides and air vias at center, which are used generate modified TE13δ mode adjust distribution of E-fields, respectively. walls, vias, DR feeding line can all be implemented printed circuit board (PCB) process, enhances integration level antenna. theoretical analysis...
We present the analysis of brightest flare that was recorded in \emph{Insight}-HMXT data set, a broad energy range (2$-$200 keV) from microquasar GRS~1915+105 during an unusual low-luminosity state. This detected by \emph{Insight}-HXMT among series flares 2 June 2019 UTC 16:37:06 to 20:11:36, with 2-200 keV luminosity 3.4$-$7.27$\times10^{38}$ erg s$^{-1}$. Basing on broad-band spectral analysis, we find spectrum shows different behaviors bright and faint epochs. The can be fitted model...
A link between magnetars and fast radio burst (FRB) sources has finally been established. In this context, one of the open issues is whether/which extra galactic FRBs exhibit X/gamma-ray outbursts whether it correlated with activity. We aim to constrain possible activity from nearest extragalactic FRB currently known over a broad energy range, by looking for bursts range timescales energies that are compatible being powerful flares magnetars. followed up as-yet source at mere 149 Mpc...
In this letter, a wideband substrate integrated dielectric resonator (SIDR) antenna with filtering response for millimeter-wave (mm wave) applications is proposed. The contains dual-mode SIDR, which fed by slot-coupled double-T-shaped microstrip feeding structure. stacked substrates the peripheral air vias and metallic via cavity are main body of ensure operation TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">111</sub> mode...
Abstract Presbyopia entails the gradual deterioration of eye’s ability to focus, and bifocal lenses have become a common remedy alleviate blurred near vision counteract eye strain induced by prolonged usage. The refractive index Abbe number these play crucial role in precisely correcting focal points within range. Nevertheless, when light rays approach lens at off-axis angles or with tilts, aberrations occur, often uneven distribution across real glass materials. amalgamation further...
A wideband dual-beam dielectric resonator antenna (DRA) with substrate integration capability was proposed for millimeter-wave (mm-wave) applications. The four rows of air vias along the x-direction and two extended rectangular patches could shift undesirable radiation mode upward move conical-beam downward, respectively. Thus, TE211 TE411 patch-loaded perforated integrated (SIDR) supporting can be retained in operating band, their improved by y-direction. T-shaped line coupled dual-slot...
This paper designs a vertical-interconnect transmission structure which could be applied in PoP(Package on Package) package structure. In this model, Through Mold Via(TMV) is utilized to realize inter-side and stacked-model interconnection. A quasi-coaxial via cluster connected the strip line designed for vertical RF transmission. It was found that center distance between core shielding vias diameter of those have great influence performance structure, requires optimization specifically. The...
Abstract Aiming at the problems of low efficiency and poor accuracy in manually identifying flattened weld seam. The method combining machine vision technology with multi-thread multi-process is proposed, detection recognition system seam designed. OTSU adaptive threshold algorithm combined Canny operator edge used for image segmentation. probabilistic Hough transform to extract straight lines identify OpenCV function library Python are implement processing algorithm, PyQt5 design...