The Experts below are selected from a list of 26985 Experts worldwide ranked by ideXlab platform
Julio C. Gutiérrez-vega - One of the best experts on this subject based on the ideXlab platform.
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Diffraction of plane waves by apodized finite-radius spiral phase Plates of integer and fractional topological charge
Proceedings of SPIE, 2009Co-Authors: Hipolito Garcia-gracia, Julio C. Gutiérrez-vegaAbstract:An analysis of the diffraction of plane waves by an apodized finite-radius circular spiral phase Plate (SPP) with integer and fractional topological charge and with variable transmission coefficients inside and outside of the Plate Edge is presented. We introduce a sinusoidal apodization function at the Edge of the Plate to allow for a continuous transition between the transmission coefficients, and between the spiral and uniform phase distributions inside and outside of the Plate Edge. The interference between the light crossing the SPP and the light which undergoes no phase alteration at the aperture plane, and the presence of an apodization at the Edge of the Plate, cause some interesting phenomena previously unobserved in this widely known problem.
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Diffraction of plane waves by finite-radius spiral phase Plates of integer and fractional topological charge
Journal of The Optical Society of America A-optics Image Science and Vision, 2009Co-Authors: Hipolito Garcia-gracia, Julio C. Gutiérrez-vegaAbstract:A detailed analysis of the plane-wave diffraction by a finite-radius circular spiral phase Plate (SPP) with integer and fractional topological charge and with variable transmission coefficients inside and outside of the Plate Edge is presented. We characterize the effect of varying the transmission coefficients and the parameters of the SPP on the propagated field. The vortex structure for integer and fractional phase step of the SPPs with and without phase apodization at the Plate Edge is also analyzed. The consideration of the interference between the light crossing the SPP and the light that undergoes no phase alteration at the aperture plane reveals new and interesting phenomena associated to this classical problem.
Feng Yao - One of the best experts on this subject based on the ideXlab platform.
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Technical Problem During Manufacturing Longitudinal Submerged Arc Welding Pipe by Rolling Plate
Welded Pipe and Tube, 2007Co-Authors: Feng YaoAbstract:It was the first time that to make the longitudinal submerged arc welding pipe by rolling Plate in our country or even in the world.So that to make the longitudinal submerged arc welding pipe by rolling Plate was confronted such kinds of technical problem as: lower rate of available sheet after straightening and cutting,maybe different properties between the head or the end and the middle of the rolling Plate,the potential defects or the imperfection that caused by without longitudinal shearing Plate Edge,without the UT lamination inspection at the steel mill and the unknown Bauchinger Effect etc.Through the twice trial manufacture and the small lot production under the organization of Panyu/Huizhou Gas Development Project of CNOOC,the steel mill and the pipe mills analyzed the test results and adjusted there own process,all the faced problem were solved,the evolution result showed that the longitudinal submerged arc welding pipe made by rolling Plate could fulfill the specification of longitudinal submerged arc welding pipe for Panyu/Huizhou Gas Development Project and its concerned specification DNV-OS-F101(2000).
Tangali S. Sudarshan - One of the best experts on this subject based on the ideXlab platform.
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Design rules for field Plate Edge termination in SiC Schottky diodes
IEEE Transactions on Electron Devices, 2001Co-Authors: Marc C. Tarplee, V. Madangarli, Q. Zhang, Tangali S. SudarshanAbstract:Practical design of silicon carbide (SiC) Schottky diodes incorporating a field Plate necessitates an understanding of how the addition of the field Plate affects the performance parameters and the relationship between the diode structure and diode performance. In this paper, design rules are presented for SiC Schottky diodes that incorporate field Plate Edge termination. The use of an appropriate field Plate Edge termination can improve the reverse breakdown voltage of a SiC Schottky diode by a factor of two. Reverse breakdown voltage values can be obtained that are up to 88% of the theoretical maximums.
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Design Rules for Field Plate Edge Termination in
2001Co-Authors: Marc C. Tarplee, V. Madangarli, Q. Zhang, Tangali S. SudarshanAbstract:Practical design of silicon carbide (SiC) Schottky diodes incorporating a field Plate necessitates an understanding of how the addition of the field Plate affects the performance parameters and the relationship between the diode structure and diode performance. In this paper, design rules are presented for SiC Schottky diodes that incorporate field Plate Edge termination. The use of an appropriate field Plate Edge termination can improve the reverse breakdown voltage of a SiC Schottky diode by a factor of two. Reverse breakdown voltage values can be obtained that are up to 88% of the theoretical maximums.
Cao Wen-ju - One of the best experts on this subject based on the ideXlab platform.
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Reason and Control Measure Occurred in Forming Weld Protruding of Spiral Submerged Arc Welded Pipe
Welded Pipe and Tube, 2008Co-Authors: Cao Wen-juAbstract:This article analyzes occurrence mechanism and reason of forming weld protruding of spiral submerged arc welded pipe and influence of peaking to protruding of steel pipe,and also put forward effective control method such as draw up the best process parameter,make steel Plate Edge shape norm,prebending steel Plate Edge to settle protruding problem.
Hipolito Garcia-gracia - One of the best experts on this subject based on the ideXlab platform.
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Diffraction of plane waves by apodized finite-radius spiral phase Plates of integer and fractional topological charge
Proceedings of SPIE, 2009Co-Authors: Hipolito Garcia-gracia, Julio C. Gutiérrez-vegaAbstract:An analysis of the diffraction of plane waves by an apodized finite-radius circular spiral phase Plate (SPP) with integer and fractional topological charge and with variable transmission coefficients inside and outside of the Plate Edge is presented. We introduce a sinusoidal apodization function at the Edge of the Plate to allow for a continuous transition between the transmission coefficients, and between the spiral and uniform phase distributions inside and outside of the Plate Edge. The interference between the light crossing the SPP and the light which undergoes no phase alteration at the aperture plane, and the presence of an apodization at the Edge of the Plate, cause some interesting phenomena previously unobserved in this widely known problem.
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Diffraction of plane waves by finite-radius spiral phase Plates of integer and fractional topological charge
Journal of The Optical Society of America A-optics Image Science and Vision, 2009Co-Authors: Hipolito Garcia-gracia, Julio C. Gutiérrez-vegaAbstract:A detailed analysis of the plane-wave diffraction by a finite-radius circular spiral phase Plate (SPP) with integer and fractional topological charge and with variable transmission coefficients inside and outside of the Plate Edge is presented. We characterize the effect of varying the transmission coefficients and the parameters of the SPP on the propagated field. The vortex structure for integer and fractional phase step of the SPPs with and without phase apodization at the Plate Edge is also analyzed. The consideration of the interference between the light crossing the SPP and the light that undergoes no phase alteration at the aperture plane reveals new and interesting phenomena associated to this classical problem.