Quantitative ultrasound has been widely used for tissue characterization. In this paper we propose a new approach compression assessment. The proposed method employs the relation between scatterers’ local spatial distribution and resulting frequency power spectrum of backscattered ultrasonic signal. We show that due to scatterers, exhibits characteristic variations. These variations can be extr...

Precision measurements of the galaxy power spectrum P (k) require a data analysis pipeline that is both fast enough to be computationally feasible and accurate enough to take full advantage of high-quality data. We present a rigorous discussion of different methods of power spectrum estimation, with emphasis on the traditional Fourier method, and linear (Karhunen-Loève; KL), and quadratic data ...

Synthetic Aperture Radar (SAR) pulse compression on Xilinx's Virtex7 FPGA platform is an important step in SAR data processing . The realization of a multichannel pulse compression system by using all digital method has the characteristics of high reliability, strong antidisturbance, good flexibility and convenient for application. In essence, pulse compression is a method of frequency spectrum...

Discrete cosine transform (DCT) is a special type of transform which is widely used for compression of speech and image. However, its use for spectrum sensing has not yet received widespread attention. This paper aims to alleviate the sampling requirements of wideband spectrum sensing by utilizing the compressive sampling (CS) principle and exploiting the unique sparsity structure in the DCT do...

Hydrostatic pressure is an effective and clean method that can give rise to the emergence of novel crystal structures physical properties. Thus, hydrostatic be used for designing new functional materials. Sillen materials or PbBiO2X (X = Cl, Br & I) are a class which have gained considerable interest in field ferroelectrics, photocatalysis, etc. In this work, we first principles methods predict...

The goal of the development phase of the CPR Instructor Real-time Review through Use of Simulation (CIRRUS) research program was to create a video library portraying a spectrum of objectively verified simulation chest compression performances. Investigators scripted and recorded 12 two-person cardiopulmonary resuscitation (CPR) videos with specific chest compression parameters encompassing a ra...

The MPEG-1 Layer 3 compression schema of audio signal, commonly known as mp3, has caused a great impact in recent years as it has reached high compression rates while conserving a high sound quality. Music and speech samples compressed at high bitrates are perceptually indistinguishable from the original samples, but very little was known about how compression acoustically affects the voice sig...

For current high-volume datasets such as IASI, near-real-time dissemination of the fullspectrum presents a challenge, but is nevertheless achievable within current bandwidth constraints, e.g. on EUMETCast. However, this may not be the case for data from future instruments. In this paper we will look at the principles for efficient data compression. It is shown that appropriate normalisation of ...

Image compression can improve the performance of the digital systems by reducing time and cost in image storage and transmission without significant reduction of the image quality. Furthermore, the discrete cosine transform has emerged as the new state-of-the art standard for image compression. In this paper, a hybrid image compression technique based on reversible blockade transform coding is ...