Publications (64)
Development of an ADC Radiation Tolerance Characterization System for the Upgrade of the ATLAS LAr Calorimeter
Hongbin Liu, Hucheng Chen, Kai Chen +4
ATLAS LAr calorimeter will perform its Phase-I upgrade during the long shut down (LS2) in 2018, a new LAr Trigger Digitizer Board (LTDB) will be designed and installed. Several com…
A real-time design based on FPGA for Expeditious Error Reconciliation in QKD system
Ke Cui, Jian Wang, Hong-fei Zhang +3
For high-speed quantum key distribution systems, error reconciliation is often the bottleneck affecting system performance. By exchanging common information through a public channe…
A low power DAQ system with high-speed storage for submersible buoy
Zhilei Zhang, Peng Miao, Houbing Liu +3
Submersible Buoy (SB) is an important apparatus capable of long-term, fixed-point, continuous and multi-directional measurement of acoustic signals and hydrological environment mon…
The K giant stars from the LAMOST survey data I: identification, metallicity, and distance
Chao Liu, Li-Cai Deng, Jeffrey L. Carlin +10
We present a support vector machine classifier to identify the K giant stars from the LAMOST survey directly using their spectral line features. The completeness of the identificat…
X-rays breaking out of pre-explosion ejecta mark a supernova's first light
Weimin Yuan, Qiu-Ju Huang, Jin-Ping Zhu +130
Massive stars die as core-collapse supernovae, whose optical light emerges days after the implosion. Theory predicts that the initial collapse-driven shock, upon breaking through t…
White dwarf-main sequence binaries from LAMOST: the DR1 catalogue
Juanjuan Ren, Alberto Rebassa-Mansergas, Ali Luo +6
Context. White dwarf-main sequence (WDMS) binaries are used to study several different important open problems in modern astrophysics. Aims. The Sloan Digital Sky Survey (SDSS) ide…
The velocity distribution in the solar neighbourhood from the LAMOST pilot survey
Qiran Xia, Chao Liu, Yan Xu +5
We use about 15,000 F/G nearby dwarf stars selected from the LAMOST pilot survey to map the U-V velocity distribution in the solar neighbourhood. An extreme deconvolution algorithm…
Musical Score Understanding Benchmark: Evaluating Large Language Models' Comprehension of Complete Musical Scores
Congren Dai, Yue Yang, Krinos Li +12
Understanding complete musical scores entails integrated reasoning over pitch, rhythm, harmony, and large-scale structure, yet the ability of Large Language Models and Vision--Lang…
In-orbit Operation and Performance of the CubeSat Soft X-ray Polarimeter PolarLight
Hong Li, Xiangyun Long, Hua Feng +21
PolarLight is a compact soft X-ray polarimeter onboard a CubeSat, which was launched into a low-Earth orbit on October 29, 2018. In March 2019, PolarLight started full operation, a…
Development of FEB Configuration Test Board for ATLAS NSW Upgrade
Houbing Lu, Feng Li, Peng Miao +5
The FEB(front end board) configuration test board is developed aiming at meeting the requirement of testing the new generation ASIC(application-specific integrated circuit) chips a…
An Ultra-high-Speed Waveform Digitizer Prototype Based on Gigabit Ethernet for Plasma Diagnostics
Weigang Yin, Lian Chen, Feng Li +1
An ultra-high-speed waveform digitizer prototype based on gigabit Ethernet has been developed. The prototype is designed to read out signals of detectors to realize the accurate me…
An sTGC Prototype Readout System for ATLAS New-Small-Wheel Upgrade
Peng Miao, Feng Li, ShengQuan Liu +5
This paper presents a readout system designed for testing the prototype of Small-Strip Thin Gap Chamber (sTGC), which is one of the main detector technologies used for ATLAS New-Sm…
A Search for Double-peaked narrow emission line Galaxies and AGNs in the LAMOST DR1
Zhi-Xin Shi, A-Li Luo, Georges Comte +15
LAMOST has released more than two million spectra, which provide the opportunity to search for double-peaked narrow emission line (NEL) galaxies and AGNs. The double-peaked narrow-…
PolarLight: a CubeSat X-ray Polarimeter based on the Gas Pixel Detector
Hua Feng, Weichun Jiang, Massimo Minuti +20
The gas pixel detector (GPD) is designed and developed for high-sensitivity astronomical X-ray polarimetry, which is a new window about to open in a few years. Due to the small mas…
Simulation Studies for the First Pathfinder of the CATCH Space Mission
Yiming Huang, Juan Zhang, Lian Tao +42
The Chasing All Transients Constellation Hunters (CATCH) space mission is an intelligent constellation consisting of 126 micro-satellites in three types (A, B, and C), designed for…
Ground calibration and network of the first CATCH pathfinder
Yiming Huang, Jingyu Xiao, Lian Tao +53
The Chasing All Transients Constellation Hunters (CATCH) space mission is focused on exploring the dynamic universe via X-ray follow-up observations of various transients. The firs…
DA white dwarfs observed in LAMOST pilot survey
Yue-Yang Zhang, Li-Cai Deng, Chao Liu +14
A total of objects from LAMOST pilot survey have been publicly released. In this work, we present a catalog of DA white dwarfs from the entire pilot survey. We outlin…
Re-detection and a Possible Time Variation of Soft X-ray Polarisation from the Crab
Hua Feng, Hong Li, Xiangyun Long +24
The Crab nebula is so far the only celestial object with a statistically significant detection in soft x-ray polarimetry, a window that has not been explored in astronomy since the…
FANDA: A Novel Approach to Perform Follow-up Query Analysis
Qian Liu, Bei Chen, Jian-Guang Lou +2
Recent work on Natural Language Interfaces to Databases (NLIDB) has attracted considerable attention. NLIDB allow users to search databases using natural language instead of SQL-li…
X-ray Polarimetry of the accreting pulsar 1A~0535+262 in the supercritical state with PolarLight
Xiangyun Long, Hua Feng, Hong Li +25
The X-ray pulsar 1A 0535+262 exhibited a giant outburst in 2020, offering us a unique opportunity for X-ray polarimetry of an accreting pulsar in the supercritical state. Measureme…
Highly Efficient 8-bit Low Precision Inference of Convolutional Neural Networks with IntelCaffe
Jiong Gong, Haihao Shen, Guoming Zhang +6
High throughput and low latency inference of deep neural networks are critical for the deployment of deep learning applications. This paper presents the efficient inference techniq…
The Nearest High-Velocity Stars Revealed by LAMOST Data Release 1
Jing Zhong, Li Chen, Chao Liu +14
We report the discovery of 28 candidate high-velocity stars (HVSs) at heliocentric distances of less than 3 kpc, based on the Large Sky Area Multi-Object Fiber Spectroscopic Telesc…
On the Metallicities of Kepler Stars
Subo Dong, Zheng Zheng, Zhaohuan Zhu +6
We use 12000 stars from Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) spectroscopic data to show that the metallicities of Kepler field stars as given in the K…
Design considerations of high-performance InGaAs/InP single-photon avalanche diodes for quantum key distribution
Jian Ma, Bing Bai, Liu-Jun Wang +4
InGaAs/InP single-photon avalanche diodes (SPADs) are widely used in practical applications requiring near-infrared photon counting such as quantum key distribution (QKD). Photon d…
Noise is All You Need: rethinking the value of noise on seismic denoising via diffusion models
Donglin Zhu, Peiyao Li, Ge Jin
We introduce SeisDiff-denoNIA, a diffusion-based seismic denoising framework that trains directly on noise extracted from field data, eliminating the dependence on synthetic datase…
Topological GCN for Improving Detection of Hip Landmarks from B-Mode Ultrasound Images
Tianxiang Huang, Jing Shi, Ge Jin +4
The B-mode ultrasound based computer-aided diagnosis (CAD) has demonstrated its effectiveness for diagnosis of Developmental Dysplasia of the Hip (DDH) in infants. However, due to…
Substructure in bulk velocities of Milky Way disk stars
Jeffrey L. Carlin, James DeLaunay, Heidi Jo Newberg +11
We find that Galactic disk stars near the anticenter exhibit velocity asymmetries in both the Galactocentric radial and vertical components across the mid-plane as well as azimutha…
SeisDiff-intp: a unified prompt-guided flow matching framework for multi-tasks seismic interpretation
Donglin Zhu, Peiyao Li, Ge Jin
The increasing demand for deep learning in seismic interpretation has highlighted significant challenges, particularly the reliance on massive, labeled datasets and the inefficienc…
Single Photon Source Driver Designed in ASIC
Bo Feng, Futian Liang, Xinzhe Wang +3
The single photon source is an important part of the quantum key distribution (QKD) system. At present, the single photon source is large in size and complex in structure for a lot…
3D Plant Root Skeleton Detection and Extraction
Jiakai Lin, Jinchang Zhang, Ge Jin +3
Plant roots typically exhibit a highly complex and dense architecture, incorporating numerous slender lateral roots and branches, which significantly hinders the precise capture an…
In-flight calibration of the Lobster Eye Imager for Astronomy
Huaqing Cheng, Hai-Wu Pan, Yuan Liu +12
The Lobster Eye Imager for Astronomy (LEIA), as a pathfinder of the Wide-field X-ray Telescope (WXT) onboard the Einstein Probe (EP) satellite, is the first lobster-eye focusing X-…
Optical Data Transmission ASICs for the High-Luminosity LHC (HL-LHC) Experiments
Xiaoting Li, Gang Liu, Jinghong Chen +17
We present the design and test results of two optical data transmission ASICs for the High-Luminosity LHC (HL-LHC) experiments. These ASICs include a two-channel serializer (LOCs2)…
X-ray polarimetry of the Crab nebula with PolarLight: polarization recovery after the glitch and a secular position angle variation
Xiangyun Long, Hua Feng, Hong Li +24
We report follow-up observations of the Crab nebula with the PolarLight X-ray polarimeter, which revealed a possible variation in polarization associated with a pulsar glitch in 20…
Modeling the in-orbit background of PolarLight
Jiahui Huang, Hua Feng, Hong Li +23
PolarLight is a gas pixel X-ray polarimeter mounted on a CubeSat, which was launched into a Sun-synchronous orbit in October 2018. We build a mass model of the whole CubeSat with t…
Fully integrated InGaAs/InP single-photon detector module with gigahertz sine wave gating
Xiao-Lei Liang, Jian-Hong Liu, Quan Wang +6
InGaAs/InP single-photon avalanche diodes (SPADs) working in the regime of GHz clock rates are crucial components for the high-speed quantum key distribution (QKD). We have develop…
The 120Gbps VCSEL Array Based Optical Transmitter (ATx) Development for the High-Luminosity LHC (HL-LHC) Experiments
Di Guo, Chonghan Liu, Jinghong Chen +18
The integration of a Verticle Cavity Surface-Emitting Laser (VCSEL) array and a driving Application-Specific Integrated Circuit (ASIC) in a custom optical array transmitter module…
Ground Calibration Result of the Wide-field X-ray Telescope (WXT) onboard the Einstein Probe
Huaqing Cheng, Chen Zhang, Zhixing Ling +24
We report on results of the on-ground X-ray calibration of the Wide-field X-ray Telescope (WXT) built from novel lobster-eye micro-pore optics, onboard the Einstein Probe (EP) sate…
A significant detection of X-ray Polarization in Sco X-1 with PolarLight and constraints on the corona geometry
Xiangyun Long, Hua Feng, Hong Li +23
We report the detection of X-ray polarization in the neutron star low mass X-ray binary Scorpius (Sco) X-1 with PolarLight. The result is energy dependent, with a non-detection in…
High-efficiency and low-jitter Silicon single-photon avalanche diodes based on nanophotonic absorption enhancement
Jian Ma, Ming Zhou, Zongfu Yu +8
Silicon single-photon avalanche diode (SPAD) is a core device for single-photon detection in the visible and the near-infrared range, and widely used in many applications. However,…
1.25 GHz sine wave gating InGaAs/InP single-photon detector with monolithically integrated readout circuit
Wen-Hao Jiang, Jian-Hong Liu, Yin Liu +3
InGaAs/InP single-photon detectors (SPDs) are the key devices for applications requiring near-infrared single-photon detection. Gating mode is an effective approach to synchronous…
Fast FPGA algorithm for neutron-gamma discrimination
Haoqi Ye, Ge Jin, Lian Chen
Various pulse shape discrimination methods have been used to solve the neutron-gamma discrimination problem. But most of them are limited to off-line calculation due to the computa…
The First Hypervelocity Star from the LAMOST Survey
Zheng Zheng, Jeffrey L. Carlin, Timothy C. Beers +10
We report the first hypervelocity star (HVS) discovered from the LAMOST spectroscopic survey. It is a B-type star with a heliocentric radial velocity about 620 km/s, which projects…
Einstein Probe discovery of EP240408a: a peculiar X-ray transient with an intermediate timescale
Wenda Zhang, Weimin Yuan, Zhixing Ling +136
We report the discovery of a peculiar X-ray transient, EP240408a, by Einstein Probe (EP) and follow-up studies made with EP, Swift, NICER, GROND, ATCA and other ground-based multi-…
CATCH: Chasing All Transients Constellation Hunters Space Mission
Panping Li, Qian-Qing Yin, Zhengwei Li +34
In time-domain astronomy, a substantial number of transients will be discovered by multi-wavelength and multi-messenger observatories, posing a great challenge for follow-up capabi…
Design and testing of an sTGC ASIC interface board for the ATLAS New Small Wheel upgrade
Xu Wang, Liang Guan, Siyuan Sun +3
The ATLAS experiment will replace the present Small Wheel (SW) detector with a New Small Wheel detector (NSW) aiming to improve the performance of muon triggering and precision tra…
Distillation Improves Visual Place Recognition for Low Quality Images
Anbang Yang, Ge Jin, Junjie Huang +3
Real-time visual localization often utilizes online computing, for which query images or videos are transmitted to remote servers for visual place recognition (VPR). However, limit…
A fast powerful X-ray transient from possible tidal disruption of a white dwarf
Dongyue Li, Wenda Zhang, Jun Yang +97
Stars captured by black holes (BHs) can be torn apart by strong tidal forces, producing electromagnetic flares. To date, more than 100 tidal disruption events (TDEs) have been obse…
Active inductor shunt peaking in high-speed VCSEL driver design
Futian Liang, Datao Gong, Suen Hou +7
An all transistor active inductor shunt peaking structure has been used in a prototype of 8-Gbps high-speed VCSEL driver which is designed for the optical link in ATLAS liquid Argo…
The Study of Multi-Layer sTGC Test System for ATLAS Phase-I upgrade
Feng Li, Xinxin Wang, Peng Miao +5
A completely New Small Wheel (NSW) will be constructed for ATLAS Phase-1 upgrade. Small-Strip Thin-Gap-Chamber (sTGC) will devote to the trigger function of NSW. A full-size sTGC q…
Scanning Test System Prototype of p/sFEB for the ATLAS Phase-I sTGC Trigger Upgrade
Xinxin Wang, Feng Li, Shengquan Liu +5
The Pad Front End Board (pFEB) and the Strip Front End Board (sFEB) are developed for the ATLAS Phase-I sTGC Trigger Upgrade. The pFEB is used to to gather and analyze pads trigger…
Flexible and Efficient Spatio-Temporal Transformer for Sequential Visual Place Recognition
Yu Kiu, Lau, Chao Chen +2
Sequential Visual Place Recognition (Seq-VPR) leverages transformers to capture spatio-temporal features effectively. In practice, a transformer-based Seq-VPR model should be flexi…
Ultra-precision DC source for Superconducting Quantum Computer
Futian Liang, Peng Miao, Jin Lin +6
The Superconducting Quantum Computing (SQC) is one of the most promising quantum computing techniques. The SQC requires precise control and acquisition to operate the superconducti…
A DAQ Prototype for Front-end Waveform Digitization in Intensive Electromagnetic Field Circumstance
Zhou He, Lian Chen, Feng Li +2
A front-end waveform digitization data acquisition system prototype for pulsed magnetic field generator in inertial confinement fusion is described. The pulse magnetic field is cre…
The Detector System Design for the Grating-based Phase Contrast Imaging CT Prototype
Lian Chen, Rongqi Sun, Ge Jin
In the hard X rays domain, the phase shift of the wave passing through the soft materials like tissues is typically three orders of magnitude larger than the absorption. Therefore…
A data transmission system for the phase contrast Xray human computed tomography prototype
Rongqi Sun, Lian Chen, Houbing Lu +2
The cross section of X-ray phase contrast caused by these low-Z elements is greatly bigger than the absorption. Therefore, in the field of X-ray imaging, the phase shift informatio…
Triaxial Alignment Magnetometer Utilizing Free-Spin Precession in the Geomagnetic Range
Ge Jin, Tao Shi, Sheng Zou
In this paper, we present a triaxial alignment magnetometer based on free-spin precession deployed in the geomagnetic range. Existing vector measurement methods often require compl…
Discrimination of background events in the PolarLight X-ray polarimeter
Jiahuan Zhu, Hong Li, Hua Feng +22
PolarLight is a space-borne X-ray polarimeter that measures the X-ray polarization via electron tracking in an ionization chamber. It is a collimated instrument and thus suffers fr…
In-flight calibration of the Wide-field X-ray Telescope on board the Einstein Probe
Huaqing Cheng, Hai-Wu Pan, Yuan Liu +14
By utilizing novel lobster-eye optics, the Wide-field X-ray Telescope (WXT) onboard the Einstein Probe (EP) satellite achieves an unprecedented combination of a large instantaneous…
The VCSEL-based Array Optical Transmitter (ATx) Development Towards 120-Gbps Link for Collider Detector: Development Update
Di Guo, Chonghan Liu, Jinghong Chen +14
A compact radiation-tolerant array optical transmitter module (ATx) is developed to provide data transmission up to 10Gbps per channel with 12 parallel channels for collider detect…
How Much of Your Data Can Suck? Thresholds for Domain Performance and Emergent Misalignment in LLMs
Jian Ouyang, Arman T, Ge Jin
This paper investigates the impact of incorrect data on the performance and safety of large language models (LLMs), specifically gpt-4o, during supervised fine-tuning (SFT). Althou…
SeisDiff-deno: A Diffusion-Based Denoising Framework for Tube Wave Attenuation in VSP Data
Donglin Zhu, Peiyao Li, Ge Jin
Tube waves present a significant challenge in vertical seismic profiling data, often obscuring critical seismic signals from seismic acquisition. In this study, we introduce the Se…
Miniaturized high-frequency sine wave gating InGaAs/InP single-photon detector
Wen-Hao Jiang, Xin-Jiang Gao, Yu-Qiang Fang +7
High-frequency gating InGaAs/InP single-photon detectors (SPDs) are widely used for applications requiring single-photon detection in the near-infrared region such as quantum key d…
MixSeq: Connecting Macroscopic Time Series Forecasting with Microscopic Time Series Data
Zhibo Zhu, Ziqi Liu, Ge Jin +4
Time series forecasting is widely used in business intelligence, e.g., forecast stock market price, sales, and help the analysis of data trend. Most time series of interest are mac…
pTSE: A Multi-model Ensemble Method for Probabilistic Time Series Forecasting
Yunyi Zhou, Zhixuan Chu, Yijia Ruan +3
Various probabilistic time series forecasting models have sprung up and shown remarkably good performance. However, the choice of model highly relies on the characteristics of the…