نتایج جستجو برای: dft

تعداد نتایج: 19542  

2003
Teresa L. McLaurin Frank Frederick Rich Slobodnik

The DFT and Test challenges faced, and the solutions applied, to the ARM1026EJ microprocessor core are described in this paper. New DFT techniques have been created to address the challenges of distributing a DFT core solution that will ultimately end up in many different environments. This core was instantiated into a test chip. The new DFT features were utilized successfully in the SoC.

Journal: :European Physical Journal-special Topics 2021

We present an extension of reverse engineered Kohn-Sham potentials from a density matrix renormalization group calculation towards the construction functional theory via deep learning. Instead applying machine learning to energy itself, we apply these techniques potentials. To this end develop scheme train neural network represent mapping local densities Finally, use up-scale simulation larger ...

Journal: :EURASIP J. Adv. Sig. Proc. 2013
Quoc-Tuong Ngo Olivier Berder Pascal Scalart

In this article, we investigate the linear precoder based on the maximization of the minimum Euclidean distance between two received data vectors. This new precoding matrix is expressed as the product of a power allocation matrix and an input-shaping matrix. The input-shaping matrix is selected as a normalized discrete Fourier transform-matrix, and the optimal power allocation depends on the ch...

Journal: :The Journal of chemical physics 2005
Baojing Zhou Emily A Carter

Orbital-free density-functional theory (OF-DFT) with modern kinetic-energy density functionals (KEDFs) is a linear scaling technique that accurately describes nearly-free-electron-like (main group) metals. In an attempt towards extending OF-DFT to transition metals, here we consider whether OF-DFT can be used effectively to study Ag, a metal with a localized d shell. OF-DFT has two approximatio...

Journal: :Signal Processing 2004
Hsuan-Yung Huang Yu-Yun Lee Pei-Chen Lo

This paper presents a novel two-dimensional split-vector-radix fast-Fourier-transform (2D svr-FFT) algorithm. The modularizing feature of the 2D svr-FFT structure enables us to explore its characteristics by identifying the local structural property. Each local module is designated as a DFT (non-DFT) block if its output corresponds to DFT (non-DFT) values. The block attribute (DFT or non-DFT) d...

2014
Anant G. Kulkarni Manoj Jha

There are three different way to calculate DFT. First method is using formula of DFT or simultaneous equation. Second is Correlation technique and third one is using Fast Fourier Transform (FFT). First method is useful for understanding of basic idea of DFT, but it is not fit for practical and application purpose. In second method is based on detecting known waveform in another signal. It is us...

2005
Wilson Fung Akiomi Kunisa

This paper proposes an RST−invariant multi−bit watermarking system based on LPM and DFT. This system embeds the watermark in a rotation and translation invariant domain obtained by first acquiring log−polar mapped DFT (LPM−DFT) magnitudes of an image, and then taking the magnitude of the 1−dimensional DFT along the angular axis of this LPM−DFT magnitudes. Neither the original cover image nor a ...

2014
Heath D. Watts Lorena Tribe James D. Kubicki

A review of the literature about calculating the adsorption properties of arsenic onto mineral models using density functional theory (DFT) is presented. Furthermore, this work presents DFT results that show the effect of model charge, hydration, oxidation state, and DFT method on the structures and adsorption energies for As and As onto Fe-(oxyhydr)oxide cluster models. Calculated interatomic ...

2001
Tetsuo Kamada

Journal: :Journal of the American College of Cardiology 2004
S Adam Strickberger George J Klein

The assessment of defibrillation (DFT) efficacy has long been the standard of care during defibrillator implantation. To ensure an acceptable DFT safety margin, early defibrillator systems frequently required that the shock polarity and the location, type, or number of electrodes had to be altered. Advances in defibrillator and lead technology have resulted in lower and more consistent DFT thre...

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