To measure the radiation properties of relativistic diffraction generator(RDG)in Ka-band,a TMon modal excitation model is established,which consists of an overmoded circular waveguide and a coaxial line feeding probe....To measure the radiation properties of relativistic diffraction generator(RDG)in Ka-band,a TMon modal excitation model is established,which consists of an overmoded circular waveguide and a coaxial line feeding probe.Using the transverse E-field mode matching and the conservation of complex power technique(CCPT),we deduce the scattering matrix at coaxial line to coaxial line and coaxial line to circular waveguide junctions.Then using the overall cascaded junction scattering matrix,the numerical results for the reflection coefficient of the coaxial line and the power distribution of TMon multi-modal are presented.The numerical results are in agreement with HFSS simulation results and experimental results.The analysis shows that by choosing the appropriate position of coaxial line probe,the power proportion of the device operating mode excited in circular waveguide could be the largest.展开更多
We discuss the nonlinear Schr6dinger equation with variable coefficients in 21） graded-index waveguides with different distributed transverse diffractions and obtain exact bright and dark soliton solutions. Based on ...We discuss the nonlinear Schr6dinger equation with variable coefficients in 21） graded-index waveguides with different distributed transverse diffractions and obtain exact bright and dark soliton solutions. Based on these solutions, we mainly investigate the dynamical behaviors of solitons in three different diffraction decreasing waveguides with the hyperbolic, Gaussian and Logarithmic profiles. Results indicate that for the same parameters, the amplitude of bright solitons in the Logarithmic profile and the amplitude of dark solitons in the Gaussian profile are biggest respectively, and the amplitude in the hyperbolic profile is smallest, while the width of solitons has the opposite case.展开更多
This review considers the modern industrial applications of augmented reality headsets.It draws upon a synthesis of information from open sources and press releases of companies,as well as the first-hand experiences o...This review considers the modern industrial applications of augmented reality headsets.It draws upon a synthesis of information from open sources and press releases of companies,as well as the first-hand experiences of industry representatives.Furthermore,the research incorporates insights from both profile events and in-depth discussions with skilled professionals.A specific focus is placed on the ergonomic characteristics of headsets:image quality,user-friendliness,etc.To provide an objective evaluation of the various headsets,a metric has been proposed which is dependent on the specific application case.This enables a comprehensive comparison of the various devices in terms of their quantitative characteristics,which is of particular importance for the formation of a rapidly developing industry.展开更多
基金supported by the National Natural Science Foundation of Chinaunder Grant No.60571020
文摘To measure the radiation properties of relativistic diffraction generator(RDG)in Ka-band,a TMon modal excitation model is established,which consists of an overmoded circular waveguide and a coaxial line feeding probe.Using the transverse E-field mode matching and the conservation of complex power technique(CCPT),we deduce the scattering matrix at coaxial line to coaxial line and coaxial line to circular waveguide junctions.Then using the overall cascaded junction scattering matrix,the numerical results for the reflection coefficient of the coaxial line and the power distribution of TMon multi-modal are presented.The numerical results are in agreement with HFSS simulation results and experimental results.The analysis shows that by choosing the appropriate position of coaxial line probe,the power proportion of the device operating mode excited in circular waveguide could be the largest.
基金Supported by the Higher School Visiting Scholar Development Project under Grant No.FX2013103the Research Fund under Grant No.ZCI2XJY003+2 种基金 Research Fund for the Doctoral Program under Grant No.Z301B13519 of the Zhejiang University of Media and CommunicationsZhejiang Province Science Foundation for Youths under Grant No.LQ12F05005National Natural Science Foundation of China under Grant No.11374254
文摘We discuss the nonlinear Schr6dinger equation with variable coefficients in 21） graded-index waveguides with different distributed transverse diffractions and obtain exact bright and dark soliton solutions. Based on these solutions, we mainly investigate the dynamical behaviors of solitons in three different diffraction decreasing waveguides with the hyperbolic, Gaussian and Logarithmic profiles. Results indicate that for the same parameters, the amplitude of bright solitons in the Logarithmic profile and the amplitude of dark solitons in the Gaussian profile are biggest respectively, and the amplitude in the hyperbolic profile is smallest, while the width of solitons has the opposite case.
基金support of“Priority 2030”program at the Bauman Moscow State Technical University.O.L.A.and M.V.S.acknowledge the financial support of the Ministry of Science and Higher Education of the Russian Federation grant(Agreement dated 06.03.2024 number 075-02-2024-1519)for the experimental research,carried out using the infrastructure of the Educational Design Center for Opto-and Microelectronics of the Bauman Moscow State Technical Universitysupport of the Ministry of Science and Higher Education of the Russian Federation(Passport No.2019-0903).
文摘This review considers the modern industrial applications of augmented reality headsets.It draws upon a synthesis of information from open sources and press releases of companies,as well as the first-hand experiences of industry representatives.Furthermore,the research incorporates insights from both profile events and in-depth discussions with skilled professionals.A specific focus is placed on the ergonomic characteristics of headsets:image quality,user-friendliness,etc.To provide an objective evaluation of the various headsets,a metric has been proposed which is dependent on the specific application case.This enables a comprehensive comparison of the various devices in terms of their quantitative characteristics,which is of particular importance for the formation of a rapidly developing industry.
