A5100326762- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Laser-induced spectroscopy and plasma
- Advanced Memory and Neural Computing
- X-ray Spectroscopy and Fluorescence Analysis
- Laser-Matter Interactions and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Spectroscopy and Laser Applications
- Ferroelectric and Negative Capacitance Devices
- Nuclear physics research studies
- Semiconductor materials and devices
- Electron and X-Ray Spectroscopy Techniques
- CCD and CMOS Imaging Sensors
- Laser-Plasma Interactions and Diagnostics
- Mass Spectrometry Techniques and Applications
- Advanced Materials Characterization Techniques
- Carbon Nanotubes in Composites
- Molecular Junctions and Nanostructures
- Graphene research and applications
- High-pressure geophysics and materials
- Fullerene Chemistry and Applications
- Transition Metal Oxide Nanomaterials
- Surface and Thin Film Phenomena
- Optical Wireless Communication Technologies
- Advanced Frequency and Time Standards
Tsinghua University
2012-2024
Hubei University of Technology
2024
Missouri University of Science and Technology
2023
Verisk Analytics (United States)
2023
Southeast University
2022
University of Science and Technology of China
2020
Guilin University of Electronic Technology
2019
Shanghai Jiao Tong University
2007-2017
Collaborative Innovation Center of Quantum Matter
2014-2017
Beijing Computational Science Research Center
2016
Learning is highly important for edge intelligence devices to adapt different application scenes and owners. Current technologies training neural networks require moving massive amounts of data between computing memory units, which hinders the implementation learning on devices. We developed a fully integrated memristor chip with improvement ability low energy cost. The schemes in STELLAR architecture, including its algorithm, hardware realization, parallel conductance tuning scheme, are...
Medical imaging is an important tool for accurate medical diagnosis, while state-of-the-art image reconstruction algorithms raise critical challenges in massive data processing high-speed and high-quality imaging. Here, we present a memristive reconstructor (MIR) to greatly accelerate with discrete Fourier transformation (DFT) by computing-in-memory (CIM) memristor arrays. A high-accuracy quasi-analogue mapping (QAM) method generic complex matrix transfer (CMT) scheme was proposed improve...
In this work, we report the monolithic three-dimensional integration (M3D) of hybrid memory architecture based on resistive random-access (RRAM), named M3D-LIME. The chip featured three key functional layers: first was Si complementary metal-oxide-semiconductor (CMOS) for control logic; second computing-in-memory (CIM) layer with HfAlOx-based analog RRAM array to implement neural networks feature extractions; third on-chip buffer and ternary content-addressable (TCAM) template storing...
In the era of Internet Things, vast amounts data generated at sensory nodes impose critical challenges on data-transfer bandwidth and energy efficiency computing hardware. A near-sensor (NSC) architecture places processing units closer to sensors such that can be processed almost in situ with high efficiency. This study demonstrates monolithic three-dimensional (M3D) integration a photosensor array, analog computing-in-memory (CIM), Si complementary metal-oxide-semiconductor (CMOS) logic...
Due to the low cross section of $p$-wave threshold photodetachment and complicated electronic structures, uncertainty electron affinities for many transition elements still remains around 10 meV, which has not been improved three decades. In this study, affinity Nb is measured as 917.40(6) meV or $7399.35(50)\phantom{\rule{0.28em}{0ex}}\mathrm{c}{\mathrm{m}}^{\ensuremath{-}1}$ using slow velocity imaging method. The accuracy was by a factor more than 400 with respect previous measurement....
Background Hypocalcemia is a documented electrolyte disturbance in people and animals with sepsis, but its mechanism poorly understood. Objective To investigate mechanisms of hypocalcemia dogs experimentally induced endotoxemia. Animals Six healthy mixed breed were included this nonrandomized, placebo‐controlled, crossover study. Methods Dogs initially injected placebo (0.9% NaCl ; 1 mL, IV ) then lipopolysaccharide ( LPS 2 μg/kg, after 5‐day washout period. Blood urine samples collected for...
Abstract Ionization potential (IP) is defined as the amount of energy required to remove most loosely bound electron an atom, while affinity (EA) released when attached a neutral atom. Both IP and EA are critical for understanding chemical properties element. In contrast accurate IPs structures atoms, EAs negative ions relatively unexplored, especially transition metal anions. Here, we report value Fe fine − using slow velocity imaging method. These measurements yield very Fe, 1235.93(28) cm...
Here we present a hybrid computing-in-memory (CIM) architecture, named M3D-CCP, by monolithically 3D integration of Si CMOS logic layer, RRAM-based CIM layer and processing-near-memory (PNM) with CNT/IGZO-based complementary field-effect transistor (CFET). The Si-CMOS was fabricated using standard 130 nm process served as control logic. consisted ITIR arrays analog resistive random-access memory (RRAM) for matrix-vector multiplication (MVM) operations in neural networks. CFET-based PNM...
The high-energy electron impact excitation cross sections are directly proportional to the generalized oscillator strengths (GOSs) of target (an atom or molecule). In present work, GOSs helium from ground state $n\phantom{\rule{0.2em}{0ex}}^{1}S$, $n\phantom{\rule{0.2em}{0ex}}^{1}P$, $n\phantom{\rule{0.2em}{0ex}}^{1}D$ $(n\ensuremath{\rightarrow}\ensuremath{\infty})$ and adjacent continuum excited states calculated by a modified $R$-matrix code within first Born approximation. order treat...
The $E2$ and $M1$ transition rates among the lowest five states (${{[}^{4}{S}_{3/2}^{o}]}^{\ensuremath{'}},{{[}^{2}{D}_{5/2}^{o}]}^{\ensuremath{'}},{{[}^{2}{D}_{3/2}^{o}]}^{\ensuremath{'}},{{[}^{2}{P}_{3/2}^{o}]}^{\ensuremath{'}},{{[}^{2}{P}_{1/2}^{o}]}^{\ensuremath{'}}$), i.e., ${{[}^{2}{D}_{5/2,3/2}^{o}]}^{\ensuremath{'}}\ensuremath{\rightarrow}{{[}^{4}{S}_{3/2}^{o}]}^{\ensuremath{'}}$...
We present a low-power gas sensor design based on capacitive micromachined ultrasonic transducer (CMUT), for use self-powered wearable platforms. Earlier CMUT-based sensor, with 70-mW power consumption operating at 50 MHz, achieved ppt-level detection limit chemical warfare agents. In this work we 4.33 MHz and consuming 0.77 mW environmental monitoring. The comprises polymer-functionalized CMUT resonator in the feedback loop of Colpitts oscillator. fabricated resonators using novel process...
Computing-in-memory (CIM) based on analog resistive random access memory (RRAM) emerges as an energy-efficient technology for edge artificial intelligence (AI), where a large amount of ON-chip data buffer is needed to implement complex neural networks. In this work, we report novel InGaZnOx (IGZO)/carbon nanotube (CNT) hybrid-polarity 2T0C DRAM backend-of-the-line (BEOL) compatible buffer, which monolithic 3-D (M3D) integrated with HfO2-based RRAM array and Si CMOS logic demonstrate M3D-BRIC...
Near-Sensor Computing In article number 2302658, Jianshi Tang and co-workers demonstrate a prototype M3D-SAIL chip for energy-efficient near-sensor computing by monolithic three-dimensional integration of an IGZO-FET based photosensor array, analog RRAM-based computing-in-memory Si CMOS logic circuits. A video keyframe-extraction task is implemented, achieving high classification accuracy 96.7% 31.5× lower energy consumption 1.91× faster speed compared to its 2D counterpart.
The momentum transfer dependence of fundamental double excitation processes helium is studied by absolute measurements using an angular resolved fast-electron energy loss spectrometer with high resolution. It elucidates the dynamical correlations, in terms internal correlation quantum numbers, K, T, and A. Fano profile parameters q, f(a), rho2, f, S doubly excited states (2)(1,0)+2 (1)S(e), (1)D(e), (2)(0,1)+2 (1)P(o) are reported as functions K2. Qualitative analysis given for (2)(-1,0)+2...
Thin films of VOx (1.3 ≤ x 2) were deposited by reactive pulsed-dc magnetron sputtering a vanadium metal target while RF-biasing the substrate. Rutherford back scattering, glancing angle x-ray, and cross-sectional transmission electron microscopy measurements revealed formation nanocolumns with nanotwins within samples. The resistivity nanotwinned ranged from 4 mΩ·cm to 0.6 Ω·cm corresponding temperature coefficient resistance between −0.1% −2.6% per K, respectively. 1/f electrical noise was...
We report the high-resolution photoelectron spectra of negative vanadium ions obtained via slow-electron velocity-map imaging method. The electron affinity V was determined to be 4255.9(18) cm-1 or 0.527 66(20) eV. accuracy improved by a factor 60 with regard previous measurement. fine structure V- well resolved: 35.9(11) (5D1), 103.8(12) (5D2), 204.17(74) (5D3), and 330.58(40) (5D4) above ground state 5D0, respectively.
Based on the $R$-matrix method, photoionization cross sections of He below $N=2$ threshold ${\mathrm{He}}^{+}$ are calculated, and a definite assignment doubly excited resonance states is determined by eigenchannel treatment. Our results in good agreement with experimental data other theoretical works. The polarization effects studied detail. We elucidate dynamic within reaction zone (i.e., box) long-range static potentials outside zone, which influence energies profiles states.
Based on a set of ``quasicomplete bases,'' using the large-scale multiconfiguration Dirac-Fock (MCDF) method, we calculate forbidden electric quadrupole ($E2$) and magnetic dipole ($M1$) transition rates transitions ${}^{2}\phantom{\rule{-0.16em}{0ex}}{D}_{5/2,3/2}^{o}\ensuremath{\rightarrow}{}^{4}\phantom{\rule{-0.16em}{0ex}}{S}_{3/2}^{o}$ O ii ground state considering quantum electrodynamics (QED) corrections. Our calculations demonstrate that Breit interactions are most important among...
We apply a numerical-basis-state method to study dynamical processes in the interaction of atoms with strong laser pulses. The is based on numerical representation finite-space energy eigenstates field-free atomic Hamiltonian box grid and expansion solution full time-dependent Schr\"odinger equation, including field, this basis. hydrogen atom present results for excitation ionization probabilities as well photoelectron momentum distributions. Convergence respect size basis parallel...
Scientific research fields for future source of energy such as inertial confinement fusion and astrophysics studies, especially with satellite observatories, advance into stages precision physics. The relevant atomic data are not only enormous but also accuracy according to requirements, both levels the collision data. We propose a scenario provide abundant enough based on analytical continuation properties scattering matrices, which is combination indispensable theoretical computations...
An extended atomic data base with sufficiently high precision in energy levels and transition/collision rates is required for satellite observation astrophysics studies development research inertial confinement fusion magnetic fusion. We summarize this paper a scenario performing calculations leading to such large-scale based on the analytical continuation properties of scattering matrices, connecting spectroscopy collisions. Based scenario, we calculate directly matrices spectroscopic...
Ship trajectory prediction is a complex time series forecasting problem that necessitates models capable of accurately capturing both long-term trends and short-term fluctuations in vessel movements. While existing deep learning excel predictions, they struggle with long-sequence (LSTF) due to difficulties dependencies, resulting significant errors. This paper proposes the Informer-TP method, leveraging Automatic Identification System (AIS) data based on Informer model, enhance ability...
Based on the multiple-scattering $X\ensuremath{\alpha}$ method, photoabsorption spectra near $1s$ threshold of ${\mathrm{CH}}_{4},$ ${\mathrm{NH}}_{3},$ ${\mathrm{H}}_{2}\mathrm{O}$, and HF with ten electrons, same as Ne atom, are calculated. The calculated near-threshold in good agreement experimental spectra. With results we can provide clear theoretical assignments for recent highly resolved In order to elucidate attractive effect localized inner-shell core hole, have adopted ground state...