Results 41 to 50 of about 854,084 (200)

Approach to weak signal extraction and detection via sparse representation

Tongxin xuebao, 2015
The sparsity models and their popular evaluation algorithms were presented.A sparse representation based approach to weak signal extraction and detection was proposed.Furthermore,a fast algorithm was developed to reduce the computational complexity of ...
Ya-fei TANG, Yun-yong ZHANG, Zhi-bin GUO
doaj   +2 more sources

Fatigue damage evaluation of metallic components based on the maximum Lyapunov exponent of modified Duffing system

Results in Physics, 2021
Because the Duffing equation is very sensitive to weak signals and noise immunity, the modified Duffing detection system is applied to detect the weak nonlinear signal in nonlinear ultrasonic experiment.
Yuhua Zhang, Silong Quan, Guoquan Liu
doaj   +1 more source

Weak Gravitational Lensing by Dark Clusters [PDF]

, 2002
We calculate the abundance of dark-matter concentrations that are sufficiently overdense to produce a detectable weak-gravitational-lensing signal. Most of these overdensities are virialized halos containing identifiable X-ray and/or optical clusters ...
Kamionkowski, Marc, Weinberg, Nevin N.
core   +4 more sources

Non-Gaussian noise benefits for coherent detection of narrowband weak signal [PDF]

, 2014
Non-Gaussian noise benefits for coherent detection of narrowband weak ...
D. Abbott, F. Chapeau-Blondeau, F. Duan
core   +3 more sources

Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection

Sensors
When the amplitude of the laser Doppler signal is less than that of the noise amplitude, the speed information cannot be identified. In this paper, the recognition of weak Doppler signals is accomplished by superimposing multiple-frame Doppler signals in
Chongbin Xi, Jian Zhou, Xiaoming Nie, Shilong Jin   +3 more
doaj   +1 more source

Weak harmonic signal detection method in chaotic interference based on extended Kalman filter

Digital Communications and Networks, 2019
The traditional methods of weak harmonic signal detection under strong chaotic interference often suffer from high computational complexity and poor performance.
Chengye Lu, Sheng Wu, Chunxiao Jiang, Jinfeng Hu   +3 more
doaj   +1 more source

Complete chiroptical signal detection using weak measurement with intensity-contrast-ratio pointers

APL Photonics, 2023
Chiroptical signals, including optical rotation (OR) and circular dichroism (CD), are widely utilized as potent probes for investigating the structure and properties of chiral molecules.
Yunhan Wang, Shaojie Yang, Qianli Zhang, Yanyu Chen, Xiaolong Hu, Hong Zhang, Zhiyou Zhang   +6 more
doaj   +1 more source

Millimeter wave radiometer for radio astronomy Patent [PDF]

, 1968
Synchronous detection system for detecting weak radio astronomical ...
Giandomenico, A., Vantuylrusch, W.
core   +1 more source

Development Toward a Ground-Based Interferometric Phased Array for Radio Detection of High Energy Neutrinos [PDF]

, 2017
The in-ice radio interferometric phased array technique for detection of high energy neutrinos looks for Askaryan emission from neutrinos interacting in large volumes of glacial ice, and is being developed as a way to achieve a low energy threshold and a
Avva, J., Bechtol, K., Chesebro, T., Cremonisi, L., Deaconu, C., Gupta, A., Ludwig, A., Messino, W., Miki, C., Nichol, R., Oberla, E., Ransom, M., Romero-Wolf, A., Saltzberg, D., Schlupf, C., Shipp, N., Varner, G., Vieregg, A. G., Wissel, S. A.   +18 more
core   +2 more sources

Kurtosis-guided Duffing for weak signal detection

EURASIP Journal on Advances in Signal Processing
Detecting weak signals embedded in strong noise remains a critical challenge across numerous engineering fields, including mechanical fault diagnosis, underwater acoustics, and biomedical monitoring. The Duffing oscillator is a well-established nonlinear
Haiyang Lou, Rujiang Hao, Qiang Xue
doaj   +1 more source