A5020065136- Catalytic Processes in Materials Science
- Geophysical Methods and Applications
- Seismic Imaging and Inversion Techniques
- Seismic Waves and Analysis
- Tunneling and Rock Mechanics
- Ultrasonics and Acoustic Wave Propagation
- Drilling and Well Engineering
- Landslides and related hazards
- Catalysts for Methane Reforming
- Electrocatalysts for Energy Conversion
- Rock Mechanics and Modeling
- nanoparticles nucleation surface interactions
- Non-Destructive Testing Techniques
- Advanced Chemical Physics Studies
- Radioactive element chemistry and processing
- Catalysis and Oxidation Reactions
- Structural Health Monitoring Techniques
- Chemical Synthesis and Characterization
- Target Tracking and Data Fusion in Sensor Networks
- Machine Learning in Materials Science
- Geotechnical Engineering and Analysis
- Ga2O3 and related materials
- Flow Measurement and Analysis
- Catalysis for Biomass Conversion
- Infrastructure Maintenance and Monitoring
University of Kansas
2018-2024
Laboratoire d'Informatique, Signaux et Systèmes de Sophia Antipolis
2022
Koenig & Bauer (Germany)
2020-2022
University of Portland
2022
Bochum University of Applied Sciences
2017-2018
Ruhr University Bochum
2013-2016
University of Notre Dame
2013
The supported mixed oxide (Rh2–yCryO3)/(Ga1–xZnx)(N1–xOx) photocatalyst, highly active for splitting of H2O, was extensively characterized its bulk and surface properties with the objective developing fundamental structure–photoactivity relationships. Raman UV–vis spectroscopy revealed that molecular electronic structures, respectively, oxynitride (Ga1–xZnx)(N1–xOx) support are not perturbed by deposition (Rh2–yCryO3) NPs. Photoluminescence (PL) spectroscopy, however, showed is source...
Methanol partial oxidation is an extremely promising route of realizing the hydrogen production for onboard such as in automobiles. Here, we report design a catalyst comprising isolated singly dispersed Ir1Znn sites and their support ZnO (Ir1Znn/ZnO), which exhibits high catalytic activity terms turnover frequency producing 13.0 H2 molecules from each site per second. The selectivities CO2 productions on Ir1Znn/ZnO are 99% at 310 °C, respectively. Compared to catalysts bimetallic...
We present and compare two flexible effective methodologies to predict disturbance zones ahead of underground tunnels by using elastic full-waveform inversion. One methodology uses a linearized, iterative approach based on misfit gradients computed with the adjoint method while other iterative, gradient-free unscented Kalman filtering in conjunction level-set representation. Whereas former does not involve priori assumptions distribution properties tunnel, latter introduces massive reduction...
Here, we report that a cationic bimetallic site consisting of one Pd and three Zn atoms (Pd1Zn3) supported on ZnO (Pd1Zn3/ZnO) exhibits an extraordinarily high catalytic activity for the generation H2 through methanol partial oxidation (MPO) is 2-3 orders magnitude higher than metallic Pd-Zn nanoalloy (Pd-Zn/ZnO). Computational studies uncovered positively charged atom subnanometer Pd1Zn3 largely decreases activation barrier dehydrogenation as compared to alloy, thus switching...
This work shows that nonlinear Kalman filters can be applied very effectively for the calibration of geomaterial parameters geomechanical modeling in mechanized tunneling, using tunneling-induced settlements and horizontal displacements. The data curves measured along tunnel excavation steps, which exhibit a relationship with respect to soil are prone measurement inaccuracies, utilized combination finite element estimate underlying parameters, sequential inference framework: filtering. paper...
TAM-5 is a hydrous crystalline sodium silicotitanate inorganic ion exchanger with high selectivity for Cs+. The kinetics of Cs+−Na+ exchange using in multicomponent electrolyte solutions were determined batch experiments. For the powder, which composed crystals, single-phase, homogeneous model fit data best. granules, prepared from two-phase, heterogeneous resulted an excellent data. Macropore and crystal diffusivities by fitting to experimental collected on powder granules. Intracrystalline...
On-purpose atomic scale design of catalytic sites, specifically active and selective at low temperature for a target reaction, is key challenge. Here, we report teamed Pd
Ground improvement adopting stone columns or rigid inclusions has become popular in engineering practice as it can be more economical under certain design criteria. In typical designs of either inclusions, the column diameter, length, and grid spacing are three main parameters that affect costs performance improved ground. This work is concerned with achieving an optimal for these two ground methods. The subject to optimization using a multiobjective algorithm respect minimizing construction...
Abstract We present in this work an ultrasonic imaging technique based on wavefield cross-correlation that has potential for high-resolution inspecting of plates and plate-like structures. A curved transmit/receive array setup is used acquiring wide-aperture waveform data beneficial applying the presented condition. An additional dispersion analysis using received by a linear allows one to reveal excited guided wave modes possibly determine shear velocity as input parameter 3D simulation....
Direct measurement of relevant system parameters often represents a problem due to different limitations. In geomechanics, geotechnical material constants which constitute model is usually very diffcult task even with modern test equipment. Back-analysis has proved be more effcient and economic method for identifying because it needs data such as settlements, pore pressures, etc., are directly measurable, inputs. Among many parameter identification methods, the Kalman filter been applied...
Summary This work presents a synthetic study of misfit topography towards identification geological structure ahead the underground tunnel by waveform inversion. Simulation viscoelastic waves is performed spectral element method implemented in SPECFEM2D package. By modeling simple 2-dimensional model with dip interface face, we construct error landscapes respect to geometric parameters defining layer interface. As result it found that very multimodal and therefore finding true inversion...
Abstract We present in this work the use of extended Kalman filter (EKF) and unscented (UKF) for identification constitutive material parameters with application mechanized tunneling. Although both filters are based on principle recursive least squares estimation, one differs from another terms where approximation is made. Whereas EKF first‐order Taylor series expansion used to approximate nonlinear modeling equation, UKF probability density state made using a small number well defined...