Abstract We propose a bootstrap test for unconditional and conditional Granger-causality spectra in the frequency domain. Our aims to detect if causality at particular is systematically different from zero. In particular, we consider stochastic process derived applying independently stationary original series. At each frequency, sample against distribution of median across frequencies estimated...

Abstract An innovative algorithm of target depth discrimination suitable for passive horizontal array in shallow sea is discussed this paper. Based on the idea modal scintillation theory, a new method high calculation speed proposed by analysing commonness between frequency domain energy low-frequency broadband signals and excitation. This avoids mode decomposition signals, greatly reduces comp...

Abstract Most self‐distillation methods need complex auxiliary teacher structures and require lots of training samples in object segmentation task. To solve this challenging, a method via frequency domain knowledge augmentation is proposed. Firstly, an network which efficiently integrates multi‐level features constructed. Secondly, pixel‐wise virtual generation model proposed to drive the trans...

in this research work, the frequency domain (fd) of surface geochemical data was analyzed to decompose the complex geochemical patterns related to different depths of the mineral deposit. in order to predict the variation in mineralization in the depth and identify the deep geochemical anomalies and blind mineralization using the surface geochemical data for the dalli cu-au porphyry deposit, a ...

Inverse Transient Analysis (ITA) is a powerful approach for leak detection of pipelines. When the pipe transient flow is analyzed in frequency domain the ITA is called Inverse Frequency Response Analysis (IFRA). To implement an IFRA for leak detection, a transient state is initiated in the pipe by fast closure of the downstream end valve. Then, the pressure time history at the valve location is...

An accurate model named as the Modified Wolff Model (MWM) is presented as an efficient CAD tool for determination of resonant frequency of the dominant and higher order modes under the multi-layer condition in thin and thick circular microstrip patch antennas. The effects of dielectric cover on the resonant frequency obtained from MWM have been compared against the result of theoretical method ...