Results 61 to 70 of about 28,257 (266)

A Discrete Dipole Approximation Solver Based on the COCG-FFT Algorithm and Its Application to Microwave Breast Imaging

International Journal of Antennas and Propagation, 2019
We introduce the discrete dipole approximation (DDA) for efficiently calculating the two-dimensional electric field distribution for our microwave tomographic breast imaging system. For iterative inverse problems such as microwave tomography, the forward
Samar Hosseinzadegan, Andreas Fhager, Mikael Persson, Paul Meaney   +3 more
doaj   +1 more source

Dual‐Site Ru Single‐Atoms and RuP Nanoclusters on N, P, and B Co‐Doped Porous Carbon for Efficient Alkaline HER and AEM Water Electrolysis

Advanced Functional Materials, EarlyView.
Ru single atoms and RuP nanoclusters are co‐anchored in N, P, and B co‐doped porous carbon nanospheres via in situ carbonization/phosphidation of a boronate polymer precursor. RuP activates water, while nearby Ru single atoms accelerate H2 formation through H* transfer. The catalyst delivers low overpotential and high durability in alkaline HER and AEM
Xiaohong Wang, Juguo Dai, Dongxu Li, Jianghua Wu, Hucheng Fu, Yiting Xu, Xueqiang Qi, Qian Xue, Yanbin Shen, Xiaoqing Pan, Conghui Yuan, Shuifen Xie, Andreu Cabot, Lizong Dai   +13 more
wiley   +1 more source

An Online Evaluation Method for Random Number Entropy Sources Based on Time-Frequency Feature Fusion

Entropy
Traditional entropy source evaluation methods rely on statistical analysis and are hard to deploy on-chip or online. However, online detection of entropy source quality is necessary in some applications with high encryption levels.
Qian Sun, Kainan Ma, Yiheng Zhou, Zhaoyuxuan Wang, Chaoxing You, Ming Liu   +5 more
doaj   +1 more source

Comparison and Realization of Fast Acquisition Method for GPS Signal under High Dynamic

MATEC Web of Conferences, 2017
In order to solve the problem of fast acquisition for GPS signal under high dynamic, the paper add window in traditional Partial Matched Filter (PMF) plus Fast Fourier Transform (FFT) for fast acquisition with the purpose of reducing the scalloping loss ...
Zeng Chan, Li Weimin, Bi Bo, Chen Qiliang   +3 more
doaj   +1 more source

Brillouin Scattering Spectrum Analysis Based on Auto-Regressive Spectral Estimation

Photonic Sensors, 2018
Auto-regressive (AR) spectral estimation technology is proposed to analyze the Brillouin scattering spectrum in Brillouin optical time-domain refelectometry.
Mengyun Huang, Wei Li, Zhangyun Liu, Linghao Cheng, Bai-Ou Guan   +4 more
doaj   +1 more source

Artifact‐Minimizing Ultrathin Transparent Electrodes Fabricated via iCVD for In Vivo Optogenetic Stimulation and Neural Signal Monitoring of Primary Visual Cortex

Advanced Functional Materials, EarlyView.
We present ultrathin flexible transparent electrodes through iCVD‐enabled molecular control of 10 nm gold films on poly(dimethylaminomethylstyrene). In vivo validation demonstrated photoelectric artifact reduction vs. opaque electrodes and preservation of natural neural dynamics.
Tae Jin Mun, Minju Kim, Chaesung Kim, Yunyoung Choi, In‐Yeop Baek, Younghak Cho, Gyeongyong Lee, Yerim Jang, Min‐Ho Nam, Wonryung Lee, Maesoon Im, Hyejeong Seong   +11 more
wiley   +1 more source

QFM Signals Parameters Estimation Based on Double Scale Two Dimensional Frequency Distribution

IEEE Access, 2019
This paper proposes a novel estimation method, named double scale two dimensional frequency distribution (DSTFD), to estimate the parameters of quadratic frequency modulated (QFM) signals.
Fulong Jing, Chunjie Zhang, Weijian Si, Yu Wang, Shuhong Jiao   +4 more
doaj   +1 more source

Simulasi Sistem Pengacak Sinyal Dengan Metode FFT (Fast Fourier Transform)

Jurnal Teknik Elektro dan Komputer, 2014
Abstract--In the world of engineering, signals is a magnitude that changed by the time and space as well as bring some information. According to the ITU ( International Telecommunication Union), the signal is a physical phenomenon in which one or more of its characteristics typify information.
Sipasulta, Reonaldo Y., Lumenta, Arie S.M., Sompie, Sherwin R.U.A.   +2 more
openaire   +2 more sources

Shape‐Controlled Guanine Self‐Assemblies for Stable and Fast‐Ion Solid–Electrolyte Interphases in Sustainable Li Metal Batteries

Advanced Functional Materials, EarlyView.
The shape of guanine self‐assemblies is tuned by introducing alkyl (G8), fluoroalkyl (G8f), and oligoether (G8g) side chains into the G moiety. The scanning tunneling microscopy results and calculations show that the presence and type of the side chain strongly affect the G self‐assembly network.
So‐Huei Kang, So‐Dam Sohn, Kyung Min Lee, Seok‐Kyu Cho, Byongkyu Lee, Ji Eun Lee, Sang‐Young Lee, Sang Kyu Kwak, Hyung‐Joon Shin, Changduk Yang   +9 more
wiley   +1 more source

Pricing Embedded Options Using Fast Fourier Transform to Compare Variance Gamma and Black-Scholes-Merton Model Efficiency [PDF]

Iranian Journal of Finance
Embedded options are virtually new instruments identical to options in many aspects except their non-tradable nature. Testing the efficiency of the Variance Gamma and Black-Scholes-Merton model on these instruments would provide a vision of transitioning
Alireza Barati, Maryam Khalili Araghi
doaj   +1 more source