Zobrazeno 1 - 10
of 736
pro vyhledávání: '"Kirchhoff approximation"'
Publikováno v:
Zhongguo Jianchuan Yanjiu, Vol 18, Iss 5, Pp 83-91 (2023)
ObjectiveIn order to further improve the speed and accuracy of calculating the acoustic scattering fields of underwater concave targets, the acoustic scattering characteristics of underwater corner reflector complexes are studied. MethodBy applying t
Externí odkaz:
https://doaj.org/article/9bfb9851ab9c49aabfbc30da939c26f2
Publikováno v:
Zhongguo Jianchuan Yanjiu, Vol 18, Iss 3, Pp 104-110 (2023)
ObjectivesIn order to further improve the accuracy of torpedoes in the acoustic homing identification of complex surface targets, a simulation study on the acoustic scattering characteristics of surface ship motion attitudes in random waves is carrie
Externí odkaz:
https://doaj.org/article/e7901ea9c6854a878b55338ff66080db
Autor:
Niutao Liu, Ya-Qiu Jin
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 16, Pp 10301-10310 (2023)
Dual-frequency synthetic aperture radar (DFSAR) onboard Chandrayaan-2 and Mini-RF onboard Lunar Reconnaissance Orbiter have acquired fully polarized and compact polarized SAR data of the lunar surface. However, there are few numerical simulations of
Externí odkaz:
https://doaj.org/article/a56df53ff1194316a881c51967d16146
Autor:
Xin Du, Jun-Ichi Takada
Publikováno v:
IEEE Access, Vol 11, Pp 44964-44976 (2023)
This paper proposes the simulation parameters of the fast Fourier transform (FFT) for the 3-dimensional (3D) split step parabolic equation (SSPE) and the mirror Kirchhoff approximation (MKA). The SSPE/MKA calculates the forward scattering by repeated
Externí odkaz:
https://doaj.org/article/df93a652c7904ee1a55fad49d0f71ca5
Publikováno v:
Archives of Acoustics, Vol vol. 47, Iss No 3, Pp 307-317 (2022)
The overall acoustic echo of a submarine is greatly dependent on the conning tower. For enhancing the acoustic stealth performance of a submarine, it is necessary to research an innovative design scheme of the conning tower to reduce its target stren
Externí odkaz:
https://doaj.org/article/a92248862f254d7792cd12f4b00b597f
Publikováno v:
Defence Technology, Vol 18, Iss 7, Pp 1097-1106 (2022)
A numerical triangulation and transformation into the time domain of a Kirchhoff approximation (KA) method is proposed for the modeling of bistatic scattering from an underwater non-penetrable target. The time domain solution in this approximation ca
Externí odkaz:
https://doaj.org/article/65efbad66761452a9c19eb74c4424a52
Autor:
Xin Du, Jun-Ichi Takada
Publikováno v:
IEEE Access, Vol 10, Pp 23829-23841 (2022)
This paper proposes a 2-dimensional low computational cost mirror Kirchhoff approximation (MKA) and the design of simulation parameters to accurately predict the shadowing gain for an arbitrarily shaped conductor cylinder. The disadvantages of the co
Externí odkaz:
https://doaj.org/article/10444e69dc834e5a80d2dbcade913689
Publikováno v:
Journal of the Saudi Society of Agricultural Sciences, Vol 20, Iss 8, Pp 559-572 (2021)
In this research work, models for the scattering from rough surfaces and semi-empirical soil moisture models are presented. Models using the “Bidirectional reflectance distribution function (BRDF)” are focussed in this study. Therefore the effect
Externí odkaz:
https://doaj.org/article/ae73885470764504bd01e3073af3fad2
Publikováno v:
Journal of Marine Science and Engineering, Vol 11, Iss 9, p 1801 (2023)
An efficient graphical acoustic computing (GRACO) method is introduced. Referring to the rendering of semi-transparent objects, the depth peeling (DP) technique is compounded with the GRACO method, forming a combined GRACO and DP method (GRACO–DP)
Externí odkaz:
https://doaj.org/article/eb3ec6d60917483787ee5319dff6b3e9
Autor:
Mikhail Batanov-Gaukhman
Publikováno v:
Avances en Ciencias e Ingeniería, Vol 12, Iss 3, Pp 45-63 (2021)
This paper shows that the stochastic approach to solving the problem of the scattering of elementary particles on crystal can serve as an alternative to Louis de Broglie's hypothesis on the wave properties of material particles. The results of calcul
Externí odkaz:
https://doaj.org/article/2162c4c2df844608a493353c650a73e4