A5067621055- Soil Moisture and Remote Sensing
- Precipitation Measurement and Analysis
- Climate variability and models
- Meteorological Phenomena and Simulations
- Climate change and permafrost
- Hydrology and Watershed Management Studies
- Cryospheric studies and observations
- Advanced Fiber Laser Technologies
- Probabilistic and Robust Engineering Design
- Ocean Waves and Remote Sensing
- Quantum Information and Cryptography
- Soil and Unsaturated Flow
- Quantum optics and atomic interactions
- Tropical and Extratropical Cyclones Research
- Photonic and Optical Devices
- Landslides and related hazards
- Plasma Diagnostics and Applications
- Wind and Air Flow Studies
- Flood Risk Assessment and Management
- Mechanical and Optical Resonators
- Nonlinear Waves and Solitons
- Computational Fluid Dynamics and Aerodynamics
- Diamond and Carbon-based Materials Research
- Nonlinear Photonic Systems
- Ionosphere and magnetosphere dynamics
University of Science and Technology of China
2025
Bureau of Meteorology
2018-2024
The University of Melbourne
2010-2022
Federation University
2022
CSIRO Oceans and Atmosphere
2022
Industrial Technology Research Institute
2013
National Synchrotron Radiation Research Center
2013
Centre for Quantum Computation and Communication Technology
2009-2011
Quantum (Australia)
2008-2009
Brown University
1979-2008
The exploitation of emerging quantum technologies requires efficient fabrication key building blocks. Sources single photons are extremely important across many applications as they can serve vectors for information—thereby allowing long-range (perhaps even global-scale) states to be made and manipulated tasks such communication or distributed computation. At the single-emitter level, sources also afford new possibilities in terms nanoscopy bio-marking. Color centers diamond prominent...
We consider a head-on collision between two solitary waves on the surface of an inviscid homogeneous fluid. A perturbation method which in principle can generate asymptotic series all orders, is used to calculate effects collision. find that emerging from (i.e. long after) preserve their original identities third order accuracy we have calculated. However does leave imprints colliding with phase shifts and shedding secondary waves. Each wave group trails behind its primary, wave. The...
A continuum theory for spherical electrostatic probes in a slightly ionized plasma is developed. The density of the taken to be sufficiently high such that both ions and electrons suffer numerous collisions with neutrals before being collected by an absorbing probe. general discussion at arbitrary potential given. It found very negative probe potentials sheath thickness can comparable radius. Two explicit forms current-voltage characteristics are given; one probes, other nearly potential....
A multi-scenario, multi-model ensemble of simulations from regional climate models is outlined to provide the core data source for a set projections and change service. subset realisations CMIP6 Global Climate Models (GCMs) are selected downscaling by Regional (RCMs) under 'sparse matrix' framework using CORDEX guidelines Shared Socio-economic Pathways that feature low emissions (SSP1-2.6) high (SSP3-7.0). The excludes poor performing models, with performance assessed climatology over large...
We present a generalized polynomial chaos algorithm to model the input uncertainty and its propagation in flow-structure interactions. The stochastic is represented spectrally by employing orthogonal functionals from Askey scheme as trial basis random space. A standard Galerkin projection applied dimension obtain equations weak form. resulting system of deterministic then solved with methods solution for each mode. This approach generalization original expansion, which was first introduced...
Abstract Global soil moisture records are essential for studying the role of hydrologic processes within larger earth system. Various studies have shown benefit assimilating satellite‐based data into water balance models or merging multisource retrievals a unified set. However, this requires an appropriate parameterization error structures underlying sets. While triple collocation (TC) analysis has been widely recognized as powerful tool estimating random variances coarse‐resolution sets,...
Abstract Triple collocation (TC) is routinely used to resolve approximated linear relationships between different measurements (or representations) of a geophysical variable that are subject errors. It has been utilized in the context calibration, validation, bias correction, and error characterization allow comparisons diverse data records from various direct indirect measurement techniques including situ remote sensing model‐based approaches. However, successful applications TC require...
Abstract. The Bureau of Meteorology Atmospheric high-resolution Regional Reanalysis for Australia (BARRA) is the first atmospheric regional reanalysis over a large region covering Australia, New Zealand, and Southeast Asia. production with approximately 12 km horizontal resolution – BARRA-R well underway completion expected in 2019. This paper describes numerical weather forecast model, data assimilation methods, forcing observational used to produce BARRA-R, analyses results from 2003–2016...
Abstract. Assimilation of remotely sensed soil moisture data (SM-DA) to correct water stores rainfall-runoff models has shown skill in improving streamflow prediction. In the case large and sparsely monitored catchments, SM-DA is a particularly attractive tool. Within this context, we assimilate satellite (SM) retrievals from Advanced Microwave Scanning Radiometer (AMSR-E), Scatterometer (ASCAT) Soil Moisture Ocean Salinity (SMOS) instrument, using an Ensemble Kalman filter improve...
The European Space Agency’s Climate Change Initiative (ESA CCI) Soil Moisture (SM) COMBINED product is a more than 40-year-long data record on global SM for climate studies and applications. It merges observations derived from multiple active passive satellite remote sensing instruments in the microwave domain. Differences sensor characteristics (such as frequency or polarization) can cause structural breaks product, which are not completely removed during merging process. These artificially...
Abstract We present a new approach to obtain solutions for general random oscillators using broad class of polynomial chaos expansions, which are more efficient than the classical Wiener–Hermite expansions. The is but here we results linear only with forcing or coefficients. In this context, able relatively sharp error estimates in representation stochastic input as well solution. have also performed computational comparisons Monte Carlo simulations show that can be orders magnitude faster,...
Collisions between two solitary waves are investigated using a numerical scheme. The phase shifts and maximum amplitude of collision checked with corresponding perturbation calculation compared the available experiments. We found wave train trailing behind each emerging from head-on collision. properties in agreement those solution. After collision, recover almost all their original for length time our calculation. However, difference (less than 2 % value) persists accounts energy residing train.
It is shown that the collisional damping on free streaming motion of plasma can be very important in certain circumstances even though frequency small compared with frequency. Both spatial and temporal echoes are treated this note. In latter case, for example, we found goes as $\mathrm{exp}[\ensuremath{-}\ensuremath{\beta}{{\ensuremath{\omega}}_{p}}^{2}{t}^{3}]$ (where $\ensuremath{\beta}$ frequency).
A spherical electrostatic (Langmuir) probe in a slightly ionized plasma is studied from kinetic theory point of view. The two-sided distribution function method Lees, which embodies the Mott-Smith approach, used. velocity space divided into two regions along straight cone tangent to probe, and different functions are defined regions. On satisfying relevant moments (continuity number density flux) three simultaneous ordinary nonlinear differential equations, appropriate all values Debye...
Abstract Remote sensing of soil moisture has reached a level maturity and accuracy for which the retrieved products can be used to improve hydrological meteorological applications. In this study, product from Soil Moisture Ocean Salinity (SMOS) satellite is improving rainfall estimates obtained Tropical Rainfall Measuring Mission multisatellite precipitation analysis (TMPA) using three different “bottom up” techniques: SM2RAIN, Analysis Tool, Antecedent Precipitation Index Modification. The...
We analyze a nitrogen-vacancy (NV^-) colour centre based single photon source on cavity Purcell enhancement of the zero phonon line and suppression other transitions. Optimal performance conditions cavity-centre system are analyzed using Master equation quantum trajectory methods. By coupling strongly to high-finesse optical [Q ~ O(10^4-10^5), V lambda^3] sub-picosecond excitation has striking performance, including effective lifetime 70 ps, linewidth 0.01 nm, near unit emission probability...
Electrostatic probes of general ellipsoidal configurations are analyzed from a continuum viewpoint for the conditions quiescent slightly ionized plasma. Approximate analytic current—voltage characteristics obtained arbitrary shapes. The cylindrical probe and circular disk discussed in detail as two special cases.
Abstract This paper explores the use of active and passive microwave satellite soil moisture products for improving streamflow prediction within four large (>5000km 2 ) semiarid catchments in Australia. We probability distributed model (PDM) under a data‐scarce scenario aim at correcting two key controlling factors generation: rainfall forcing data catchment wetness condition. The analysis tool (SMART) is used to correct near real‐time product (forcing correction scheme) an ensemble...
Due to the limited availability of discharge data in many catchments globally, it is important develop a calibration method that does not rely solely on data. Motivated by this limitation, two approaches using water level directly hydrological calibrations are proposed study. The first Spearman Rank correlation (SRC) based scheme, which calibrates modelled streamflow against observed correlation. second an Inverse Rating Curve (IRC) function introduces three more parameters simulate from...
Based on a simple fluid approach, the theory of instability due to nonlinear coupling an electron plasma oscillation and ion acoustic driving transverse field is worked out extended case in which longitudinal field. It shown that effects fields are same limit long wavelength as one would expect physically. In addition, effect drift velocity nonlinearity-induced mentioned above also examined. found can be greatly enhanced when approaches wave velocity. Derivation results by Vlasov equation...