In earthquake source estimation, coda-derived source methods provide more stable source parameters than methods using direct waves due to the inherent averaging nature of coda waves (Mayeda and Walter, 1996; Mayeda et al., 2007). Unlike conventional direct-phase regional measurements (e.g., Pg or Lg), which take peak amplitude at the specific arrival time, the coda amplitude measurement through...

Time–frequency representations using the Wigner distribution (WD) may be significantly obscured by the noise in observations. The analysis performed for the WD of discrete-time noisy signals shows that this time–frequency representation can be optimized by the appropriate choice of the window length. However, the practical value of this analysis is not significant because the optimization requi...

We study the concentration of denoiser loss estimators, with application to the selection of denoiser parameters for a given observed sequence (in particular, the window size k of the DUDE algorithm [1]) via minimization of the estimated loss. We show that for a loss estimator proposed earlier [2], it is not possible to derive strong concentration results for certain pathological input sequence...

Digital filter plays an important role in digital signal processing applications. Digital filter can also be applied in speech processing applications, such as speech filtering, speech enhancement, noise reduction and automatic speech recognition among others. In this paper Matlab program is used to implement a low-pass FIR filter using adjustable window function based on Hamming window. In som...

Constructing ultrasound statistical parametric images by using a sliding window is a widely adopted strategy for characterizing tissues. Deficiency in spatial resolution, the appearance of boundary artifacts, and the prerequisite data distribution limit the practicability of statistical parametric imaging. In this study, small-window entropy parametric imaging was proposed to overcome the above...

Estimating the transformation between two images from the same scene is a fundamental step for image registration, image stitching and 3D reconstruction. State-of-the-art methods are mainly based on sorted residual for generating hypotheses. This scheme has acquired encouraging results in many remote sensing applications. Unfortunately, mainstream residual based methods may fail in estimating t...

If direct-sequence spread-spectrum (DS/SS) modulation is employed, the receiver must acquire the chip timing for incoming messages before these messages can be demodulated. If the system or network employs DS/SS multiple access, also known as code-division multiple access (CDMA), the acquisition process is more difficult because multiple messages are transmitted simultaneously and in the same f...

BACKGROUND The posterior longitudinal ligament (PLL) has been found to be a reliable measure of the acoustic target window for lumbar spinal anaesthesia and a predictive tool for difficult spinals. Currently, there is limited information on the PLL in the thoracic spine and its potential use for optimizing the acoustic target window during thoracic epidural placement. This study examined the ef...

Term proximity has been successfully used in many entity retrieval searches and enhance the quality of the retrieval systems. In general, the goal of entity searches is to retrieve a ranked list of entities in response to a user’s query. The entities could be organisations, products, location, or people. Some of the proximity models that were successful used association discovery in a window of...

This paper presents a simple analog-to-digital converter with a trapping window. As a constant input is applied, the window extracts an available length of the binary output sequence automatically. As main theoretical results, we clarify a parameter condition for the approximation using all the fractions of given precision and give an analytical formulation of the average error of the approxima...