The Experts below are selected from a list of 180003 Experts worldwide ranked by ideXlab platform
Jian Zhang - One of the best experts on this subject based on the ideXlab platform.
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3D Finite Element Simulation of Shot Peening Using a Sequential Model with Multiple-Shot Impacts
International Journal of Computational Methods, 2020Co-Authors: Qin Wei, Jianguo Zhu, Jian ZhangAbstract:A Sequential Model of multiple-shot impacts has been established to investigate the shot peening process. Shot groups are proposed and designed with different patterns to obtain full surface covera...
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3D Finite Element Simulation of Shot Peening Using a Sequential Model with Multiple-Shot Impacts
International Journal of Computational Methods, 2019Co-Authors: Qin Wei, Jianguo Zhu, Jian ZhangAbstract:A Sequential Model of multiple-shot impacts has been established to investigate the shot peening process. Shot groups are proposed and designed with different patterns to obtain full surface coverage in the impacted region and a satisfactory computational efficiency. The Sequential Model was applied for the prediction of residual stress on a GH4169 alloy specimen. The results showed that uniform and saturated states of residual stress along the surface and depth profile were obtained in the impacted region when the numerical order of shot patterns reached 4. Furthermore, the numerical results of compressive residual stress in the subsurface were compared with the experimental results obtained using the X-ray diffraction (XRD) analysis and the incremental hole drilling method. The maximum relative error between the numerical results and XRD measurement was 11.6%. Furthermore, the stress profile measured using the incremental hole drilling method was consistent with the numerical results. The established finite element Model demonstrated its robustness and effectiveness for the evaluation of residual stress in the shot-peened GH4169 alloy, and it may be applied to other metallic materials with simple modifications.
Peter Van Endert - One of the best experts on this subject based on the ideXlab platform.
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a Sequential Model for peptide binding and transport by the transporters associated with antigen processing
Immunity, 1994Co-Authors: Peter Van Endert, Robert Tampe, Thomas H Meyer, Roland Tisch, Jean Francois Bach, H O McdevittAbstract:The TAP proteins translocate antigenic peptides into the endoplasmic reticulum. Investigation of the specificity of this process has been complicated by TAP-independent factors that influence the amount of peptide that accumulates in the ER in transport assays. We have developed an overexpression system in which binding of peptides to the TAP substrate-binding site and peptide transport by TAP can be quantified separately. Efficiency of peptide accumulation in the ER parallels affinity for the TAP substrate-binding site, but can be modified by interaction with the glycosylation system within the ER and, probably, peptide efflux. Random peptide mixtures of 9-16 aa display significantly higher affinity for the binding site than mixtures of shorter or longer peptides. Peptide binds to TAP heteromers in the absence of ATP and is released by the binding of ATP, suggesting a Model for TAP function.
Y.h. Kerr - One of the best experts on this subject based on the ideXlab platform.
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A Sequential Model for disaggregating near-surface soil moisture observations using multi-resolution thermal sensors
Remote Sensing of Environment, 2009Co-Authors: O. Merlin, A. Al Bitar, J P. Walker, Y.h. KerrAbstract:A Sequential Model is developed to disaggregate microwave-derived soil moisture from 40 km to 4 km resolution using MODIS (Moderate Imaging Spectroradiometer) data and subsequently from 4 km to 500 m resolution using ASTER (Advanced Scanning Thermal Emission and Reflection Radiometer) data. The 1 km resolution airborne data collected during the three-week National Airborne Field Experiment 2006 (NAFE'06) are used to simulate the 40 km pixels, and a thermal-based disaggregation algorithm is applied using 1 km resolution MODIS and 100 m resolution ASTER data. The downscaled soil moisture data are subsequently evaluated using a combination of airborne and in situ soil moisture measurements. A key step in the procedure is to identify an optimal downscaling resolution in terms of disaggregation accuracy and sub-pixel soil moisture variability. Very consistent optimal downscaling resolutions are obtained for MODIS aboard Terra, MODIS aboard Aqua and ASTER, which are 4 to 5 times the thermal sensor resolution. The root mean square error between the 500 m resolution Sequentially disaggregated and ground-measured soil moisture is 0.^062 vol./vol. with a bias of −0.045^ vol./vol. and values ranging from 0.08 to 0.40^ vol./vol.
Qin Wei - One of the best experts on this subject based on the ideXlab platform.
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3D Finite Element Simulation of Shot Peening Using a Sequential Model with Multiple-Shot Impacts
International Journal of Computational Methods, 2020Co-Authors: Qin Wei, Jianguo Zhu, Jian ZhangAbstract:A Sequential Model of multiple-shot impacts has been established to investigate the shot peening process. Shot groups are proposed and designed with different patterns to obtain full surface covera...
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3D Finite Element Simulation of Shot Peening Using a Sequential Model with Multiple-Shot Impacts
International Journal of Computational Methods, 2019Co-Authors: Qin Wei, Jianguo Zhu, Jian ZhangAbstract:A Sequential Model of multiple-shot impacts has been established to investigate the shot peening process. Shot groups are proposed and designed with different patterns to obtain full surface coverage in the impacted region and a satisfactory computational efficiency. The Sequential Model was applied for the prediction of residual stress on a GH4169 alloy specimen. The results showed that uniform and saturated states of residual stress along the surface and depth profile were obtained in the impacted region when the numerical order of shot patterns reached 4. Furthermore, the numerical results of compressive residual stress in the subsurface were compared with the experimental results obtained using the X-ray diffraction (XRD) analysis and the incremental hole drilling method. The maximum relative error between the numerical results and XRD measurement was 11.6%. Furthermore, the stress profile measured using the incremental hole drilling method was consistent with the numerical results. The established finite element Model demonstrated its robustness and effectiveness for the evaluation of residual stress in the shot-peened GH4169 alloy, and it may be applied to other metallic materials with simple modifications.
H O Mcdevitt - One of the best experts on this subject based on the ideXlab platform.
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a Sequential Model for peptide binding and transport by the transporters associated with antigen processing
Immunity, 1994Co-Authors: Peter Van Endert, Robert Tampe, Thomas H Meyer, Roland Tisch, Jean Francois Bach, H O McdevittAbstract:The TAP proteins translocate antigenic peptides into the endoplasmic reticulum. Investigation of the specificity of this process has been complicated by TAP-independent factors that influence the amount of peptide that accumulates in the ER in transport assays. We have developed an overexpression system in which binding of peptides to the TAP substrate-binding site and peptide transport by TAP can be quantified separately. Efficiency of peptide accumulation in the ER parallels affinity for the TAP substrate-binding site, but can be modified by interaction with the glycosylation system within the ER and, probably, peptide efflux. Random peptide mixtures of 9-16 aa display significantly higher affinity for the binding site than mixtures of shorter or longer peptides. Peptide binds to TAP heteromers in the absence of ATP and is released by the binding of ATP, suggesting a Model for TAP function.
