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radial acceleration estimation of multiple high maneuvering targets

Journal of Systems Engineering and Electronics 2014年第2期25卷 183-193页

作者： Shuyi Jia Guohong Wang Shuncheng Tan Institute of Information Fusion Naval Aeronautical and Astronautical University

The acceleration of a high maneuvering target in signal processing is helpful to enhance the performance of the tracker and facilitate the classification of targets. At present, most of the research on acceleration estimation is carried out in cases of a single target with time-frequency analysis methods such as fractional Fourier transform （FRFT）, Hough-ambiguity transform （HAT）, and Wigner-Vil e distribution （WVD）, which need to satisfy enough time duration and sampling theorem. Only one reference proposed a method of acceleration estimation for multiple targets based on modified polynomial phase transform （MPPT） in the lin-ear frequency modulation （LFM） continuous-wave （CW） radar. The method of acceleration estimation for multiple targets in the pulse Doppler （PD） radar has not been reported so far. Compressive sensing （CS） has the advantage of sampling at a low rate and short duration without sacrificing estimation performance. There-fore, this paper proposes a new method of acceleration estimation for multiple maneuvering targets with the unknown number based on CS with pulse Doppler signals. Simulation results validate the effectiveness of the proposed method under several conditions with different duration, measurement numbers, signal to noise ra-tios （SNR）, and regularization parameters, respectively. Simulation results also show that the performance of the proposed method is superior to that of FRFT and HAT in the condition of multiple targets.

关键词： radial acceleration compressive sensing (CS) highmaneuvering targets fractional Fourier transform (FRFT) Hough-ambiguity transform (HAT).

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How to Use Starobinsky Inflationary Potential Plus Argument from Alder, Bazin, and Schiffer as radial acceleration to Obtain First Order Approximation as to Where/When Cosmological Constant May Form

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Journal of High Energy Physics, Gravitation and Cosmology 2022年第4期8卷 1012-1018页

作者： Andrew Walcott Beckwith Physics Department Chongqing University Chongqing China

Using the Klauder enhanced quantization as a way to specify the cosmological constant as a baseline for the mass of a graviton, we eventually come up and then we will go to the Starobinsky potential as a replacement for the term N used in Equation (3) and Equation (4). From there we will read in a way to describe conditions allowing for where the cosmological constant may be set. The idea also is to describe a regime of space-time where the initial perturbation/start to inflation actually occurred, as is alluded to in the final part of the document.

关键词： radial acceleration Cosmological Constant Raviton

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