Results 71 to 80 of about 854,084 (200)

Research on an Echo-Signal-Detection Algorithm for Weak and Small Targets Based on GM-APD Remote Active Single-Photon Technology

Photonics
Geiger-mode avalanche photodiode (GM-APD) is a single-photon-detection device characterized by high sensitivity and fast response, which enables it to detect echo signals of distant targets effectively.
Shengwen Yin, Sining Li, Xin Zhou, Jianfeng Sun, Dongfang Guo, Jie Lu, Hong Zhao   +6 more
doaj   +1 more source

An ultrahigh sensitivity acoustic sensor system for weak signal detection based on an ultrahigh-Q CaF₂ resonator. [PDF]

Microsyst Nanoeng, 2023
Xing T, Xing E, Jia T, Li J, Rong J, Li L, Tian S, Zhou Y, Liu W, Tang J, Liu J.   +10 more
europepmc   +1 more source

The Minimum AC Signal Model of Bipolar Transistor in Amplification Region for Weak Signal Detection. [PDF]

Sensors (Basel), 2021
Huang L, Miao Q, Su X, Wu B, Song K.
europepmc   +1 more source

High-Sensitivity Detection Method for Weak Signals of Vessel Shaft-Rate Electric Field

水下无人系统学报
There are weak signals in shaft-rate electric fields from vessels, and they are easily masked by noise. To address these issues, this paper proposed a comprehensive high-gain weak signal detection method guided by the priority detection and selective ...
Pingyang YU, Honglei WANG, Yixin YANG
doaj   +1 more source

An ultra-sensitive pulsed balanced homodyne detector: Application to time-domain quantum measurements

, 2001
A pulsed balanced homodyne detector has been developed for precise measurements of electric field quadratures of pulsed optical quantum states. A high level of common mode suppression (> 85 dB) and low electronic noise (730 electrons per pulse) provide a
A. I. Lvovsky, Anderson, Breitenbach, C. Hettich, Daly, D’Ariano, Foster, Furusawa, H. Hansen, Hirano, J. Mlynek, Lam, Lvovsky, Ou, P. Lodahl, S. Schiller, Schneider, Slusher, Smithey, Smithey, T. Aichele, Vasilyev, Wu, Yuen   +23 more
core   +2 more sources

Information-theoretic bounds and phase transitions in clustering, sparse PCA, and submatrix localization

, 2017
We study the problem of detecting a structured, low-rank signal matrix corrupted with additive Gaussian noise. This includes clustering in a Gaussian mixture model, sparse PCA, and submatrix localization.
Banks, Jess, Moore, Cristopher, Vershynin, Roman, Verzelen, Nicolas, Xu, Jiaming   +4 more
core   +2 more sources

Testing Weak Lensing Maps With Redshift Surveys: A Subaru Field

, 2012
We use a dense redshift survey in the foreground of the Subaru GTO2deg^2 weak lensing field (centered at $\alpha_{2000}$ = 16$^h04^m44^s$;$\delta_{2000}$ =43^\circ11^{\prime}24^{\prime\prime}$) to assess the completeness and comment on the purity of ...
Adelman-McCarthy, Casertano, Daniel G. Fabricant, Dressler, Geller, Geller, Girardi, Hamana, Hennawi, Hoekstra, Ian P. Dell’Antonio, Khiabanian, Koester, Kubo, Leauthaud, Lubin, Lubin, Lubin, Margaret J. Geller, Michael J. Kurtz, Mink, Miyazaki, Miyazaki, Mobasher, Postman, Rines, Rines, Satoshi Miyazaki, Shan, Spergel, Struble, Taniguchi, White, Wittman, Wittman, Yousuke Utsumi   +35 more
core   +1 more source

Weak Target Integration Detection Based on Radar Communication Integrated Signal via Constructed Step-LFM Model [PDF]

Radioengineering
Weak target detection is a great challenging in radar field. To detect weak targets via radar communication integrated signal, a method for constructed step-LFM (CStep-LFM) signal is proposed based on quadrature amplitude modulation-orthogonal frequency ...
L. Xiao, X. Rao, W. He, H. Yi, J. Hu
doaj  

Spatial CUSUM for Signal Region Detection [PDF]

, 2018
Detecting weak clustered signal in spatial data is important but challenging in applications such as medical image and epidemiology. A more efficient detection algorithm can provide more precise early warning, and effectively reduce the decision risk and
Zhang, Xin, Zhu, Zhengyuan
core   +3 more sources

SARAS 2: A Spectral Radiometer for probing Cosmic Dawn and the Epoch of Reionization through detection of the global 21 cm signal

, 2017
The global 21 cm signal from Cosmic Dawn (CD) and the Epoch of Reionization (EoR), at redshifts $z \sim 6-30$, probes the nature of first sources of radiation as well as physics of the Inter-Galactic Medium (IGM). Given that the signal is predicted to be
Girish, B. S., Raghunathan, A., Rao, Mayuri Sathyanarayana, Shankar, N. Udaya, Singh, Saurabh, Somashekar, R., Srivani, K. S., Subrahmanyan, Ravi   +7 more
core   +1 more source