A5103174982- Advanced X-ray Imaging Techniques
- Mineral Processing and Grinding
- Ferroelectric and Piezoelectric Materials
- X-ray Spectroscopy and Fluorescence Analysis
- High-pressure geophysics and materials
- Graphite, nuclear technology, radiation studies
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Microwave Dielectric Ceramics Synthesis
- Fusion materials and technologies
- Coal and Coke Industries Research
- Advanced X-ray and CT Imaging
- Granular flow and fluidized beds
- Nuclear materials and radiation effects
- Metallurgy and Material Forming
- Mining Techniques and Economics
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Non-Destructive Testing Techniques
- Advanced Radiotherapy Techniques
- Calcium Carbonate Crystallization and Inhibition
- Particle Accelerators and Free-Electron Lasers
- Metal Forming Simulation Techniques
- Boron and Carbon Nanomaterials Research
- Crystallography and Radiation Phenomena
Digital China Health (China)
2025
Guiyang University
2025
Shenyang Jianzhu University
2024
China Information Technology Security Evaluation Center
2024
Nanjing Forestry University
2021-2022
Brookhaven National Laboratory
2012-2021
Northwestern Polytechnical University
2020-2021
State University of New York
2021
University of Edinburgh
2001-2013
National Synchrotron Light Source II
1997-2013
The origin of ultrahigh piezoelectricity in the relaxor ferroelectric PbZn1/3Nb2/3O3-PbTiO3 was studied with an electric field applied along [001] direction. zero-field rhombohedral R phase starts to follow direct polarization path tetragonal symmetry via intermediate monoclinic M phase, but then jumps irreversibly alternate involving a different type distortion. Details structure and domain configuration this novel are described. This result suggests that there is nearby R-M boundary as...
High-energy x-ray-diffraction experiments performed on rhombohedral $\mathrm{Pb}({\mathrm{Zn}}_{1/3}{\mathrm{Nb}}_{2/3}{)}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}{\mathrm{O}}_{3}$ $(\mathrm{PZN}\ensuremath{-}x%\mathrm{PT})$ crystals with $x=4.5%$ and 8% show that an electric field applied along the [001] direction induces tetragonal phase, as proposed by Park Shrout. Our reveal in PZN-4.5%PT such a phase change occurs via third monoclinic symmetry ${M}_{A},$ which is observed at intermediate...
Abstract Large-area X-ray imaging is one of the most widely used modalities that spans several scientific and technological fields. Currently, direct conversion materials are being commercially for large-area (> 8 cm × 4 without tiling) flat panel applications, such as amorphous selenium (a-Se), have usable sensitivities up to only 30 keV. Although there been many promising candidates (such polycrystalline HgI 2 CdTe), none semiconductors were able assuage requirement high energy 40 keV)...
High energy $(67\phantom{\rule{0.3em}{0ex}}\mathrm{keV})$ x-ray diffuse scattering measurements were performed on single crystals of $\mathrm{Pb}({\mathrm{Zn}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}\text{\ensuremath{-}}x\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ $(\mathrm{PZN}\text{\ensuremath{-}}x\mathrm{PT})$, to map out the distribution in all three dimensions around a large number Bragg peaks simultaneously. For $x=0,4.5%$, and 8%, results are very similar, indicating same type...
Objective Our study aims to evaluate the spatial and temporal changes of breast-conserving surgery (BCS) rates influential factors BCS in Guangdong Province, China. Design, setting participants This registry-based cohort analysed data patients all age groups, from medical record cover page, which was mandatorily collected for inpatients by Health Administrative Department Patients with non-metastatic breast cancer, who underwent between 2013 2019, were included. Main outcomes measures We...
This study combined gas chromatography–ion mobility spectrometry (GC-IMS) and multivariate statistical analysis to explore the differences in characteristic aroma of Idesia polycarpa Maxim (I. polycarpa) fruit oil under different drying methods: natural (ND), hot air (HAD), microwave (MD), vacuum (MVD). The results revealed that 91 volatile compounds were identified fruit, 82 found I. polycarpa. HAD MD resulted most significant loss both oil. In contrast, MVD demonstrated best retention...
High energy x-ray diffraction measurements on $\mathrm{Pb}({\mathrm{Zn}}_{1/3}{\mathrm{Nb}}_{2/3}){\mathrm{O}}_{3}$ (PZN) single crystals show that the system does not have a rhombohedral symmetry at room temperature as previously believed. The phase (X) in bulk of crystal gives Bragg peaks similar to nearly cubic lattice with slight tetragonal distortion. profile remains sharp no evidence size broadening due polar microcrystals. However, our preliminary studies skin, we found expected (R)...
Using neutron elastic and inelastic scattering high-energy x-ray diffraction, we present a comparison of 40% Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_{3}$-60% PbTiO$_{3}$ (PMN-60PT) with pure Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_{3}$ (PMN) (PT). We measure the structural properties PMN-60PT to be identical PT, however, lattice dynamics are exactly that previously found in relaxors PMN PZN. displays well-defined macroscopic transition from cubic tetragonal unit cell at 550 K. The diffuse is shown weak indicating...
Inverse Compton scattering of laser photons by ultrarelativistic electron beam provides polarized x- to $\ensuremath{\gamma}$-ray pulses due the Doppler blueshifting. Nonlinear electrodynamics in relativistically intense linearly field changes radiation kinetics established during interaction. These are induced figure-8 motion, which introduces an overall redshift spectrum, with concomitant emission higher order harmonics. To experimentally analyze strong physics associated nonlinear...
Nonisothermal densification in 8% yttria doped zirconia (8YSZ) particulate matter of 250 nm median particle size was studied under 215 V/cm dc electric field and 9 °C/min heating rate, using time-resolved in-situ high temperature energy dispersive x-ray diffractometry with a polychromatic 200 keV synchrotron probe. Densification occurred the 876–905 °C range, which resulted 97% theoretical density. No local melting at particle-particle contacts observed scanning electron micrographs,...
X-ray diffraction studies on a $\mathrm{Pb}({\mathrm{Zn}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}$ (PZN) single-crystal sample show the presence of two different structures. An outer layer exists in most $\ensuremath{\sim}10$ to $50\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}\mathrm{m}$ crystal, and undergoes structural phase transition at Curie temperature ${T}_{C}\ensuremath{\approx}410\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The inside is, however, very different. lattice crystal...
Two powerful synchrotron x-ray scattering techniques for residual strain depth-profiling and tomography-like scatter-intensity profiling of materials are presented. The utilize energy dispersive scattering, from a fixed microvolume, with microscanning the specimen being used to profile its interior. profiles exploit scattering-cross-section variations, can be contrast enhanced by separately monitoring different crystal structures. technique is shown finely chronicle internal variation over...
An analyzer for detection of fluorescence radiation was developed XAFS dilute samples at energies above 13 keV.The is a bent Laue crystal logarithmic spiral shape.The K lines can be collected with large solid angle and moderate reflectivity using the asymmetric [ 111 ] reflection silicon crystals 200 micron thick.Tuning diffraction different made one adjustment.Experiment performed APS BioCAT ID bealrdine to an average radius mm diffract silver fuorescence x-rays.The (35 by 120 active area)...
This paper describes an experimental investigation on the pressure dip phenomenon in a conical pile of granular solids. The roles different deposition processes such as pouring rate, height and jet size formation were studied. Test results confirmed that is robust formed by top deposition. When radius significantly smaller than final (i.e. concentrated deposition), developed centre shown previous studies. However, when comparable to diffuse location moves towards edge jet, with local maximum...
In search of a low-Z pion production target for the Long Baseline Neutrino Facility (LBNF) Deep Underground Experiment (DUNE) four graphite grades were irradiated with protons in energy range 140--180 MeV, to peak fluence $\ensuremath{\sim}6.1\ifmmode\times\else\texttimes\fi{}{10}^{20}\text{ }\text{ }\mathrm{p}/{\mathrm{cm}}^{2}$ and irradiation temperatures between $120--200\text{ }\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. The test array included POCO ZXF-5Q, Toyo-Tanso IG 430,...