Results 71 to 80 of about 696,668 (189)

Detection of ultra-high resonance contrast in vapor cell atomic clocks

, 2012
We propose and demonstrate a novel detection scheme of clock signals and obtain an ultra-high resonance contrast above 90%. The precision of the signal's detection and the signal-to-noise ratio (SNR) of atomic clock signal is improved remarkably.
Allan, Ardit, Budker, Gawlik, Gawlik, Godone, Huijuan He, Jianliao Deng, Jinda Lin, Lvovsky, Micalizio, Micalizio, Vanier, Vanier, Yisheng Ma, Yuzhu Wang, Zibrov, Zibrov, Zigdon   +18 more
core   +1 more source

Detection of Potential Transit Signals in the First Three Quarters of Kepler Mission Data

, 2012
We present the results of a search for potential transit signals in the first three quarters of photometry data acquired by the Kepler Mission. The targets of the search include 151,722 stars which were observed over the full interval and an additional ...
Batalha, Bill Wohler, Borucki, Borucki, Bruce D. Clarke, Christopher K. Middour, Douglas A. Caldwell, Dwight T. Sanderfer, Elisa V. Quintana, Forrest R. Girouard, James E. Nickerson, Jason F. Rowe, Jeffrey C. Smith, Jeffrey Van Cleve, Jenkins, Jenkins, Jessie L. Christiansen, Jie Li, Jon M. Jenkins, Joseph D. Twicken, Martin C. Stumpe, Michael R. Haas, Miles T. Cote, Natalie M. Batalha, Peter Tenenbaum, Shawn Seader, Susan E. Thompson, Thomas Barclay, Todd C. Klaus, William J. Borucki   +29 more
core   +1 more source

Thin Sectioning Improves the Peak Intensity and Signal-to-Noise Ratio in Direct Tissue Mass Spectrometry

Journal of the Mass Spectrometry Society of Japan, 2006
Direct tissue analysis and imaging using mass spectrometry can extract a mass of information directly from complex biological samples. To carry out successful profiling and mapping of biomolecules, though, techniques for correct sample preparation are required. This article focuses on the influences of tissue thickness on mass spectra.
Yuki SUGIURA, Shuichi SHIMMA, Mitsutoshi SETOU   +2 more
openaire   +2 more sources

HVS-based imperceptibility measure of watermark in watermarked color image

Tongxin xuebao, 2008
Imperceptibility of embedded digital watermark reflects the fidelity of watermarked image. The masking of frequency, luminance, texture and color on human vision were analyzed.
YANG Hong-mei, LIANG Yong-quan, LIU Lian-shan, JI Shu-juan   +3 more
doaj   +2 more sources

A comparison of the fractal and JPEG algorithms [PDF]

A proprietary fractal image compression algorithm and the Joint Photographic Experts Group (JPEG) industry standard algorithm for image compression are compared.
Cheung, K.-M., Shahshahani, M.
core   +1 more source

Probabilistic Non-Local Means

, 2013
In this paper, we propose a so-called probabilistic non-local means (PNLM) method for image denoising. Our main contributions are: 1) we point out defects of the weight function used in the classic NLM; 2) we successfully derive all theoretical ...
Natarajan, Premkumar, Noonan, Joseph P., Tracey, Brian, Wu, Yue   +3 more
core   +1 more source

RETRACTED ARTICLE: Non-sample fuzzy based convolutional neural network model for noise artifact in biomedical images

Discover Applied Sciences
The use of a light-weight deep learning Convolutional Neural Network (CNN) augmented with the power of Fuzzy Non-Sample Shearlet Transformation (FNSST) has successfully solved the problem of reducing noise and artifacts in Low-Dose Computed Tomography ...
Haewon Byeon, Ruchi Kshatri Patel, Deepak A. Vidhate, Sherzod Kiyosov, Saima Ahmed Rahin, Ismail Keshta, T. R. Vijaya Lakshmi   +6 more
doaj   +1 more source

Two-photon excitation of nitric oxide fluorescence as a temperature indicator in unsteady gas-dynamic processes [PDF]

A laser induced fluorescence technique, suitable for measuring fluctuating temperatures in cold turbulent flows containing very low concentrations of nitric oxide is described.
Gross, K. P., Mckenzie, R. L.
core   +1 more source

Transmit power imbalance reduction method and nonlinear companding transform for beamforming OFDM systems

ICT Express, 2019
Due to large peak-to-average power ratio (PAPR) at the time domain OFDM signal, various peak signal reduction methods for OFDM systems have been proposed.
Satoshi Taroda, Ken Tezuka, Shoichi Higuchi, Chang-Jun Ahn, Kazuki Maruta   +4 more
doaj   +1 more source

Denoising Monte Carlo rendering models combined with JDKPNet in artistic design application scenarios

Intelligent Systems with Applications
s: In the art design and visual effects industry, efficient rendering technology is crucial for enhancing the visual experience and meeting user aesthetic needs.
Fei Tian
doaj   +1 more source