scholarly journals Directional far-field response of a spherical nanoantenna

2011 ◽  
Vol 36 (11) ◽  
pp. 2146 ◽  
Author(s):  
Yang G. Liu ◽  
Yan Li ◽  
Wei E. I. Sha
Keyword(s):  
Far Field ◽  
Field Response

Wave Component Analysis of Fluid-Loaded, Finite Cylindrical Shell Response

1995 ◽  
Author(s):  
Karl Grosh ◽  
Peter M. Pinsky
Keyword(s):  
Surface Displacement ◽  
Dispersion Relations ◽  
Wave Number ◽  
Far Field ◽  
Signal Processing Algorithm ◽  
Field Response ◽  
Finite Cylindrical Shell ◽  
Finite Shell ◽  
Complex Dispersion

Abstract In this paper, the surface displacement response of a finite fluid-loaded shell and the resulting far field acoustic pressure are studied. A high resolution signal processing algorithm is applied to the surface displacement to estimate the constituent wave numbers and corresponding amplitudes for these wave components. This parameter estimation technique identifies the fluid-loaded cylinder’s complex dispersion relations from finite shell data; the dispersion relations consist of subsonic, leaky, evanescent and oscillatory-decaying wave-number loci. The identified results are compared to the analytic dispersion relations. The far field pressure radiated due to each wave-number component is computed allowing for the determination of important contributors to the far field response. For the frequencies studied, the subsonic wave dominates the far field response due to the finite length of the shell and large amplitude of this component. The supersonic components have the next largest contribution to the far field pressure.

Superposition of Cretaceous and Cenozoic deformation in northern Tibet: A far-field response to the tectonic evolution of the Tethyan orogenic system

2021 ◽  
Author(s):  
Ye Wang ◽  
Xuanhua Chen ◽  
Yaoyao Zhang ◽  
Zheng Yin ◽  
Andrew V. Zuza ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Early Cretaceous ◽  
Detrital Zircons ◽  
The Tibetan Plateau ◽  
Far Field ◽  
The South ◽  
Field Mapping ◽  
The North ◽  
Northern Tibetan Plateau ◽  
Field Response

Although the Cenozoic Indo-Asian collision is largely responsible for the formation of the Tibetan plateau, the role of pre-Cenozoic structures in controlling the timing and development of Cenozoic deformation remains poorly understood. In this study we address this problem by conducting an integrated investigation in the northern foreland of the Tibetan plateau, north of the Qilian Shan-Nan Shan thrust belt, NW China. The work involves field mapping, U-Pb detrital-zircon dating of Cretaceous strata in the northern foreland of the Tibetan plateau, examination of growth-strata relationships, and construction and restoration of balanced cross sections. Our field mapping reveals multiple phases of deformation in the area since the Early Cretaceous, which was expressed by northwest-trending folding and northwest-striking thrusting that occurred in the early stages of the Early Cretaceous. The compressional event was followed immediately by extension and kinematically linked right-slip faulting in the later stage of the Early Cretaceous. The area underwent gentle northwest-trending folding since the late Miocene. We estimate the magnitude of the Early Cretaceous crustal shortening to be ∼35%, which we interpret to have resulted from a far-field response to the collision between the Lhasa and the Qiangtang terranes in the south. We suggest that the subsequent extension in the Early Cretaceous was induced by orogenic collapse. U-Pb dating of detrital zircons, sourced from Lower Cretaceous sedimentary clasts from the north and the south, implies that the current foreland region of the Tibetan plateau was a topographic depression between two highland regions in the Early Cretaceous. Our work also shows that the Miocene strata in the foreland region of the northern Tibetan plateau was dominantly sourced from the north, which implies that the rise of the Qilian Shan did not impact the sediment dispersal in the current foreland region of the Tibetan plateau where this study was conducted.

Near-Field and Acoustic Far-Field Response of a High-Speed Jet to Excitation

AIAA Journal ◽  
2015 ◽  
Vol 53 (7) ◽  
pp. 1894-1909 ◽  
Author(s):  
M. Crawley ◽  
A. Sinha ◽  
M. Samimy
Keyword(s):  
High Speed ◽  
Near Field ◽  
Far Field ◽  
Field Response
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