A5070817599- Nuclear physics research studies
- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Chaos-based Image/Signal Encryption
- Rare-earth and actinide compounds
- Advanced Steganography and Watermarking Techniques
- Atmospheric aerosols and clouds
- Quantum Chromodynamics and Particle Interactions
- Air Quality Monitoring and Forecasting
- Atomic and Molecular Physics
- Biometric Identification and Security
- Atmospheric Ozone and Climate
- Molecular Spectroscopy and Structure
- Image and Video Stabilization
- Vehicle emissions and performance
- Pesticide Exposure and Toxicity
- Pesticide and Herbicide Environmental Studies
- Stellar, planetary, and galactic studies
- Advanced Chemical Physics Studies
- Toxic Organic Pollutants Impact
- Quantum chaos and dynamical systems
- Superconductivity in MgB2 and Alloys
- Quantum Information and Cryptography
- Orbital Angular Momentum in Optics
- Heavy metals in environment
Hebei University of Engineering
2024
Chinese Academy of Sciences
2002-2020
Aerosol Dynamics (United States)
2020
Institute of Earth Environment
2005-2020
China XD Group (China)
2020
Peking University
2000-2006
Institute of Theoretical Physics
2002
Abstract. Continuous measurements of atmospheric organic and elemental carbon (OC EC) were taken during the high-pollution fall winter seasons at Xi'an, Shaanxi Province, China from September 2003 through February 2004. Battery-powered mini-volume samplers collected PM2.5 samples daily PM10 every third day. Samples also obtained plumes residential coal combustion, motor-vehicle exhaust, biomass burning sources. These analyzed for OC/EC by thermal/optical reflectance (TOR) following...
In spring 2005, daily particulate matter (PM 2.5 ) aerosol samples were collected at Tongliao, a site in the Horqin sand land of northeastern China. The concentrations 20 elements, 9 water‐soluble ions, and elemental organic carbon (EC OC, respectively) determined filter samples. Crustal material was major contributor to PM mass, but rural biomass burning local urban pollution also influenced composition aerosol. mean mass concentration 126 ± 71 μ g m −3 (arithmetic standard deviation), with...
Six residences were selected (two roadside, two urban, and rural) to evaluate the indoor-outdoor characteristics of PM(2.5) (aerodynamic diameter <2.5 microm) carbonaceous species in Hong Kong during March April 2004. Twenty-minute-averaged indoor outdoor concentrations recorded by DustTrak samplers simultaneously at each site for 3 days examine diurnal variability mass their indoor-to-outdoor (I/O) ratios. Daily (24-h average) indoor/outdoor samples collected on pre-fired quartz-fiber...
Abstract. A total suspended particulate (TSP) sample was collected hourly in Xi'an, an inland megacity of China near the Loess Plateau, during a dust storm event 2013 (9 March 18:00−12 10:00 LT), along with size-resolved aerosol sampling and online measurement PM2.5. The TSP samples were determined for elemental carbon (EC), organic (OC), water-soluble (WSOC) nitrogen (WSON), inorganic ions elements to investigate chemistry evolution particles. Hourly concentrations Cl−, NO3−, SO42−, Na+...
Abstract. PM10 and size-resolved particles (9-stage) were simultaneously collected at Mt. Hua Tai in central east China during the spring of 2009 including a massive dust storm occurring on 24 April (named as DS II), determined for organic compounds to investigate impact aerosols. High molecular weight (HMW) n-alkanes, fatty acids, alcohols trehalose sharply increased almost entirely stayed coarse when was present, suggesting that high level aerosols mountain atmospheres event largely...
The microscopic mechanism of identical superdeformed bands in ${}^{192,193,194}\mathrm{Hg}$ is investigated using the particle-number conserving treatment for cranked shell model with monopole and quadrupole pairing interactions. In combination analysis normally deformed rare-earth nuclei, it shown that observed nuclei $A\ensuremath{\sim}190$ region result from competition among effect, interaction, blocking effect on pairing, Coriolis antipairing where a strict consistent plays crucial role.
Abstract A method is proposed to enhance the security of three-dimensional (3D) objects through computer-generated hologram (CGH) encryption and hiding. The process begins by encoding 3D object using an iterative angular-spectrum layer-oriented create optimized phase-only CGH. Next, encrypted image produced modulating CGH with a chaotic random phase mask (CRPM) generated Henon mapping. Subsequently, combination discrete wavelet transform (DWT) singular value decomposition (SVD) utilized...
Abstract To improve the security and invisibility of image encryption concealment, an encrypted computer generated hologram (CGH) watermarking technology based on discrete wavelet transform (DWT) singular value decomposition (SVD) is proposed. Firstly, to be encoded converted into a binary real-valued CGH. The CGH then embedded host as watermark, implementing concealment. During decryption, watermark first extracted using inverse DWT-SVD correct keys. Subsequently, decrypted obtained by...
The microscopic mechanism of identical normally deformed bands at low spin in the rare-earth nuclei is investigated using a particle-number conserving (PNC) treatment cranked shell model Hamiltonian. observed seniority-zero, -one, and -two are reproduced quite well by PNC calculation, which no free parameter involved. influence blocking effects on moments inertia depends sensitively location Coriolis response blocked levels. crucial point that effect must be taken into account strictly...
Abstract A hybrid digital watermarking and encryption technique based on the Computer Generated Holography (CGH) fractional Fourier transform (FRFT) combined with singular value decomposition (SVD) algorithm is proposed for securing three-dimensional (3D) information. Initially, hierarchical 3D information encrypted using angular spectrum diffraction method a random phase key. This process yields binary real valued CGH, where incorporating key broadens space adds complexity, effectively...
The $\ensuremath{\omega}$ variation of moments inertia superdeformed bands is investigated by a particle-number conserving (PNC) method the cranked shell model Hamiltonian with monopole and quadrupole pairings. observed dependence for ${}^{192,194}\mathrm{Hg}(1),$ particularly shift in ${J}^{(2)}$ downturn ${}^{194}\mathrm{Hg}(1)$ to higher frequency, are well reproduced PNC calculation. microscopic mechanism (contribution from each Nilsson orbital) clearly exhibited mainly attributed...
The experimentally observed obvious nonadditivity in the nuclear moment of inertia and angular momentum alignment multiquasiparticle rotational bands, both normally deformed superdeformed nuclei, presents a serious challenge to traditional BCS treatment for pairing. It is shown that systematically mainly comes from destructive interference between blocking effects, can be satisfactorily accounted by particle-number conserving method, which effects are treated consistently exactly.
Heavy metal pollution in fine particulate matter (PM<sub>2.5</sub>) is a serious environmental and health concern China, particularly during winter.
The series of high-$K$ multiquasiparticle bands in ${}^{172,173,174,175}\mathrm{Hf}$ are investigated using the particle-number-conserving (PNC) method for treating cranked shell model with monopole and quadrupole pairing interactions. experimental results, including moments inertia angular momentum alignments relative to ground state band ${}^{172}\mathrm{Hf}(\mathrm{g}.\mathrm{s}.\mathrm{b}.)$ reproduced quite well by PNC calculation, which no free parameter is involved. difference...
Probabilities of angular momentum I projected states from six particles Cranking Shell Model (CSM) as a function cranking frequency ω are calculated and its validity is studied carefully. The generalized eigenvalue equations solved. All the results show that CSM eigenfunctions have totally different properties rigid rotor approximated by phenomenological model.