A5101523006- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- 3D Surveying and Cultural Heritage
- Remote Sensing and LiDAR Applications
- High-Energy Particle Collisions Research
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Robotics and Sensor-Based Localization
- Error Correcting Code Techniques
- Cooperative Communication and Network Coding
- Particle Accelerators and Free-Electron Lasers
- Advanced Wireless Communication Techniques
- Physics of Superconductivity and Magnetism
- Nuclear physics research studies
- Remote Sensing and Land Use
- Quantum, superfluid, helium dynamics
- Spectroscopy and Chemometric Analyses
- IPv6, Mobility, Handover, Networks, Security
- Nuclear reactor physics and engineering
- 3D Modeling in Geospatial Applications
- Automated Road and Building Extraction
- Superconducting Materials and Applications
- Colorectal Cancer Screening and Detection
- Advanced Authentication Protocols Security
- Mobile Agent-Based Network Management
State Key Laboratory of Remote Sensing Science
2022-2024
PLA Information Engineering University
2021-2023
Massachusetts Institute of Technology
2000-2022
Nanchang University
2022
Third Affiliated Hospital of Nanchang University
2022
Anhui Fuhuang Architectural Design Research (China)
2021
Shanghai University
2021
Sun Yat-sen University
2015-2017
Fiberhome Technology Group (China)
2017
William & Mary
2007
We present measurements of the ratio proton elastic electromagnetic form factors, μpGEp/GMp. The Jefferson Lab Hall A Focal Plane Polarimeter was used to determine longitudinal and transverse components recoil polarization in ep scattering; these is proportional two factors. These data reproduce observation Jones et al. [Phys. Rev. Lett. 84, 1398 (2000)], that factor decreases significantly from unity above Q2=1GeV2.Received 29 May 2001DOI:https://doi.org/10.1103/PhysRevC.64.038202©2001...
We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The were made 28 distinct kinematic settings covering a range momentum transfer $0.4<{Q}^{2}<5.5\phantom{\rule{0.3em}{0ex}}{(\mathrm{GeV}∕c)}^{2}$. These represent significant contribution to world's data set ${Q}^{2}$ range, where large discrepancy currently exists between ratio electric magnetic proton form factors extracted from previous and that recently...
We have measured the transverse asymmetry ${A}_{{T}^{\ensuremath{'}}}$ in ${}^{3}\stackrel{\ensuremath{\rightarrow}}{\mathrm{He}}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}})$ quasielastic scattering Hall A at Jefferson Laboratory with high precision for ${Q}^{2}$ values from 0.1 to $0.6(\mathrm{GeV}/c{)}^{2}$. The neutron magnetic form factor ${G}_{M}^{n}$ was extracted based on Faddeev calculations ${Q}^{2}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.1$ and...
We have measured the transverse asymmetry AT' in quasielastic 3He→(e→,e') process with high precision at Q2 values from 0.1 to 0.6(GeV/c)2. The neutron magnetic form factor GMn was extracted of and 0.2(GeV/c)2 using a nonrelativistic Faddeev calculation which includes both final-state interactions (FSI) meson-exchange currents (MEC). Theoretical uncertainties due FSI MEC effects were constrained measurement spin-dependent threshold region 3He→(e→,e'). also 0.3 0.6(GeV/c)2 based on plane wave...
We present measurements of the recoil proton polarization for d(γ→,p→)n reaction at θc.m.=90° photon energies up to 2.4 GeV. These are first data in this transfer with circularly polarized photons. The induced py vanishes above 1 GeV, contrary meson-baryon model expectations, which resonances lead large polarizations. However, Cx does not vanish inconsistent hadron helicity conservation. Thus, we show that scaling behavior observed d(γ,p)n cross sections is a result perturbative QCD. should...
The first measurements of the d(gamma,p)n differential cross section at forward angles and photon energies above 4 GeV were performed Thomas Jefferson National Accelerator Facility (JLab). results indicate evidence an angular dependent scaling threshold. Results straight theta(cm) = 37 degrees are consistent with constituent counting rules for E(gamma) greater, similar GeV, while those 70 1.5 GeV.
We present measurements of the recoil proton polarization for 1H(→γ,→p)π0 reaction θπc.m.=60°–135° and photon energies up to 4.1 GeV. These are first data in this transfer with circularly polarized photons. Various theoretical models compared results. No evidence hadron helicity conservation is observed. Models that employ factorization not favored. It appears from strong angular dependence induced at 2.5 3.1 GeV a relatively high spin resonance or background amplitude might exist energy...
We report on a detailed study of longitudinal strength in the nucleon resonance region, presenting new results from inclusive electron-proton cross sections measured at Jefferson Lab Hall C four-momentum transfer range $0.2<{Q}^{2}<5.5\phantom{\rule{4pt}{0ex}}{\mathrm{GeV}}^{2}$. The data have been used to accurately perform 167 Rosenbluth-type longitudinal/transverse separations. precision $R={\ensuremath{\sigma}}_{L}/{\ensuremath{\sigma}}_{T}$ are presented here, along with first separate...
The first complete measurements of the angular distributions two-body deuteron photodisintegration differential cross section at photon energies above 1.6 GeV were performed Thomas Jefferson National Accelerator Facility. results show a persistent forward-backward asymmetry up to Eγ=2.4GeV, highest-energy measured in this experiment. Hard Rescattering and Quark-Gluon string models are fair agreement with results.Received 19 July 2002DOI:https://doi.org/10.1103/PhysRevC.66.042201©2002...
Many studies were carried out for the construction of low density parity-check (LDPC) codes. They usually focused on introducing methods good LDPC codes instead a general method code optimization. This paper proposes with high versatility, called parallel vector message passing-based edge exchange (PMPE), optimizing type graph-based codes, without changing parameters mother such as length, rate, and degree distribution. With approximately nearest codewords searching approach, we find...
The road grid pattern (RGP) is a common spatial structure in urban networks, and important for revealing development, population distribution, functional area delineation. However, recognizing RGPs vector data complex intelligent task that requires comprehensive consideration of geometry, semantic features, their contextual relationships. Previous studies have overlooked the hierarchical nature cognitive process, resulting limited accuracy patterns. For this reason, study proposes...
To overcome the drawbacks of pairwise registration for mobile laser scanner (MLS) point clouds, such as difficulty in searching corresponding points and inaccuracy matrix, a robust coarse-to-fine method is proposed to align different frames MLS clouds into common coordinate system. The identifies correct pairs from source target then calculates transform matrix. First, performance multiscale eigenvalue statistic-based descriptor with combinations parameters evaluated identify optimal...
In this paper, we focus on the construction of a type quasi-cyclic low-density-parity-check (QC LDPC) codes called cycle codes. Based our previous work, maximum entropy (MCE) algorithm for constructing nonbinary LDPC can be extended to its QC form (QC-MCE), which maintains structure parity-check matrix. With method employed, an elegant distribution nonzero entries over Galois field GF(q) obtained among cycles whose length is related girth. Thus, independence probabilistic information...
Automatic pairwise registration for unordered terrestrial laser scanner (TLS) point clouds is the pre-requisite many applications, including 3D model reconstruction, cultural heritage management and landslide monitoring. However, most of existing methods are still suffering from several limitations: (1) difficult to find correct corresponding pairs source target cloud, (2) low accuracy (3) iterative process time-consuming. To overcome these challenges, based on covariance matrix, this paper...
To obtain the complete coverage when scanning a large-scale scene using laser scanner, registration of pairwise point clouds by corresponding geometric features is usually necessary under condition insufficient direct geographic reference information GNSS sensors. In this paper, we propose target-less coarse method for voxel-based planes, which are identified pair conjugate 2-plane bases. The planes firstly extracted from entire cloud with 3D cubic grids decomposed octree-based voxelization;...
We report on a detailed study of longitudinal strength in the nucleon resonance region, presenting new results from inclusive electron-proton cross sections measured at Jefferson Lab Hall C four-momentum transfer range 0.2 < Q^2 5.5 GeV^2. The data have been used to accurately perform 167 Rosenbluth-type / transverse separations. precision R = sigma_L sigma_T are presented here, along with first separate values inelastic structure functions F_1 and F_L this regime. component is found be...
Low-density parity-check (LDPC) codes which were proposed in 1962 had been proved to approach the Shannon limit performance. Due superior performance, LDPC have got wide applications information transmission and magnetic recording. Meanwhile, good usually bear such as irregular quasi-cyclic LDPC, so it is valuable study deeply construction of codes. In this digest, we focus on a type codes, called cycle whose matrix has exactly weight-2 columns. Based our previous work, Maximum Cycle...
Abstract Accurate land information using was the foundation of modern agriculture. The Sential-2 images were used as data sources in this paper. Firstly, spectral curve analysis features study area performed and non-vegetated areas excluded by decision tree method. Since same texture feature each band had a certain autocorrelation, principal component method to reduce dimension. In end, 49 including original band, vegetated could be achieved, then 3 models with different input which...
After using a terrestrial laser scanner to acquire building facade point clouds, the extraction of feature lines can simplify expression objects, thereby contributing accurate construction geometric models. To address problems missing and low accuracy in existing methods, this study proposes line method for clouds by exploring different spatial topological relationship between non-feature points. The comprises three steps: extraction, generation, merging optimization. First, points are...
The fully automatic registration of 3D terrestrial laser scanning (TLS) point clouds, which is the first step in usage a highly challenging task Light Detection and Ranging (LiDAR) remote sensing applications. Here, an algorithm for pairwise coarse TLS clouds using line features proposed. First, sets were extracted from original pair respectively, two arbitrary lines cloud used to construct 2-line base; Then, conjugate bases identified source target at time, based on rotation matrix together...
Objective: To investigate the value of stool-based methylated SDC2 test in physical examination population for screening colorectal neoplasms. Methods: Using prospective cohort study method, from December 2020 to November 2021, 2 107 participants First People's Hospital Xiushui County, Jiangxi Province were enrolled, consisted 1 012 males and 094 females, aged 20-90 years with median age 49 old. Fresh stool samples collected DNA methylation tests carried out as primary method. The positive...
The Internet Engineering Task Force (IETF) proposed the Session Initiation Protocol (SIP) as IP-based telephony protocol. With widespread application of Voice over IP (VoIP) on Internet, Security problems SIP have received a lot attention researchers and authentication mechanism in is becoming increasingly important. Many studies reveal that initial version specification suffers malicious attacks. To improve security SIP, amendments supplements are expressed years. Researches previous been...