Active Cloaking with an Incident-Field Estimation Algorithm

2021 ◽  
Author(s):  
Paris Ang ◽  
George V. Eleftheriades
Keyword(s):  
Estimation Algorithm ◽  
Incident Field ◽  
Field Estimation

Incident-Field Estimation for Active Cloaking

2021 ◽  
Vol 16 (6) ◽  
Author(s):  
Paris Ang ◽  
George V. Eleftheriades
Keyword(s):  
Incident Field ◽  
Field Estimation

scholarly journals Estimation and Modeling of Fluctuating Wind Amplitude and Phase Spectrum Using APES Algorithm Based on Field Monitored Data

2018 ◽  
Vol 2018 ◽  
pp. 1-14
Author(s):  
Dan-hui Dan ◽  
Xiang-jie Wang ◽  
Xing-fei Yan ◽  
Wei Cheng
Keyword(s):  
Wind Velocity ◽  
Wind Field ◽  
Spectral Estimation ◽  
Amplitude Spectrum ◽  
Estimation Algorithm ◽  
Phase Spectrum ◽  
Velocity Data ◽  
Field Estimation ◽  
Local Wind Field ◽  
Fluctuating Wind

The fluctuating wind power spectrum (FWPS) in given specifications could only represent the second-order probabilistic characteristic, which indicates that it is not capable of fully expressing the stochastic wind field. Estimation and modeling of the fluctuating wind amplitude spectrum (FWAS) as well as the fluctuating wind phase spectrum (FWPhS) by using measured wind velocity data can make up for the deficiencies mentioned above. A high-resolution nonparametric spectral estimation algorithm—amplitude and phase estimation (APES)—is used to estimate the FWAS and the FWPhS, using the field measured wind velocity data of a certain cable-stayed bridge in Shanghai, China. An empirical expression (eFWAS) is introduced by dimensional analysis to model the random FWAS, and its specific Davenport form is proposed according to field measured data. The parameters of the Davenport eFWAS model are estimated by using the above measured FWAS, and three specific applications of this model are put forward when different known conditions are met. Compared with the measured FWAS, the stochastic Davenport eFWAS model proposed in this paper can accurately describe the statistical properties of the local wind field and improve the modeling accuracy of the FWAS, which is important in antiwind structural design and safety assessment.

Magnetic field estimation

1956 ◽  
Vol 26 (104) ◽  
pp. 240
Author(s):  
G.D. Stairmand
Keyword(s):  
Magnetic Field ◽  
Field Estimation

The Statistical Evaluations of Transmission Characteristics, Limits of Ranges and Speeds of Transmission of Information Via the Pulsed Atmospheric Bistatic Optical Channels

2019 ◽  
pp. 97-104
Author(s):  
Mikhail V. Tarasenkov ◽  
Egor S. Poznakharev ◽  
Vladimir V. Belov
Keyword(s):  
Communication Systems ◽  
Estimation Algorithm ◽  
Transmission Characteristics ◽  
Radiation Beam ◽  
Optical Channels ◽  
The Monte Carlo Method ◽  
Wide Range ◽  
Transmission Of Information ◽  
Optical Axes ◽  
Visibility Range

The simulation program by the Monte Carlo method of pulse reactions of bistatic atmospheric aerosol-gas channels of optical-electronic communication systems (OECS) is created on the basis of the modified double local estimation algorithm. It is used in a series of numerical experiments in order to evaluate statistically the transfer characteristics of these channels depending on the optical characteristics of an atmosphere plane-parallel model for wavelengths λ = 0.3, 0.5, and 0.9 μm at a meteorological visibility range SM = 10 and 50 km. The results are obtained for a set of basic distances between the light source and the light receiver up to 50 km and for the angular orientations of the optical axes of a laser radiation beam and of the receiving system in a wide range of their values. The dependences of the pulse reactions maximum values over-the-horizon channels of the OECS on the variations of these parameters are established.

Field Estimation in Tunnel and Underground by Ray Tracing Method

2000 ◽  
Vol 54 (3) ◽  
pp. 46-56
Author(s):  
K. Uchida ◽  
D. Da ◽  
C. K. Lee ◽  
T. Matsunaga ◽  
T. Imai ◽  
...  
Keyword(s):  
Ray Tracing ◽  
Ray Tracing Method ◽  
Field Estimation ◽  
Tracing Method
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