Results 231 to 240 of about 6,996 (263)

Operation mode detectors for random signal generators

Automation and Remote Control, 2010
We propose efficient methods of estimating oscillation modes in dynamic systems based on the spectral representation and Poincare recurrence theorem. We show hardware implementations for operation mode detectors for chaotic oscillations.
L. S. Sotov, V. N. Kharin, A. L. Khvalin
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Mining Outliers with Ensemble of Heterogeneous Detectors on Random Subspaces

2010
Outlier detection has many practical applications, especially in domains that have scope for abnormal behavior. Despite the importance of detecting outliers, defining outliers in fact is a nontrivial task which is normally application-dependent. On the other hand, detection techniques are constructed around the chosen definitions.
Hoang Vu Nguyen, Hock Hee Ang, Vivekanand Gopalkrishnan   +2 more
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CT detector evaluation with complex random backgrounds

SPIE Proceedings, 2012
Modern computed tomography (CT) uses detector arrays consisting of large numbers of photodiodes with scintil- lator crystals. The number of pixels in the array can play an important role in system performance. Considerable research has been performed on signal detection in flat backgrounds under various conditions, but little has been done with ...
Helen Fan, Harrison H. Barrett
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An on-chip homodyne detector for generating random numbers

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017
The homodyne detector is a primitive element in many quantum optics experiments. It is primarily a characterization device, used for measuring the quantum state of the electromagnetic field[1]. Quantum integrated photonics[2], in which optical sources, circuits, and detectors are monolithically integrated on a semi-conductor chip, provides a compact ...
Dylan H. Mahler, Francesco Raffaelli, Giacomo Ferranti, Philip Sibson, Jake E. Kennard, Alberto Santamato, Gary Sinclair, Damien Bonneau, Mark G. Thompson, Jonathan C. F. Matthews   +9 more
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Design of MMSE multiuser detectors using random matrix techniques

IEEE International Conference on Communications, 2003. ICC '03., 2004
Reduced-rank MMSE receivers using asymptotic weights reduce receiver complexity while maintaining good performance in long-sequence DS-CDMA systems. In this paper, we analyze such receivers in multipath fading channels and extend their design to multicarrier CDMA (both uplink and downlink).
Li L., Tulino A. M., Verdu S.
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RANDOM ENSEMBLE OF LOCALLY OPTIMUM DETECTORS FOR DETECTION OF ADVERSARIAL EXAMPLES

2018 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2018
Deep neural networks achieve state-of-the-art performance for several image classification problems but have been shown to be easily fooled by adversarial perturbations which slightly modify a legitimate image in a specific direction and are visually indistinguishable from the original.
Amish Goel, Pierre Moulin
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A Random-valued Impulse Noise Detector Using Level Detection

2005 IEEE International Symposium on Circuits and Systems, 2005
We propose a new detector of random-valued impulse noise in images using level detection. In our method, we use directional windows in order to search a level region in the images. One window, whose variation is lowest, is selected as a flat window from multi directional windows.
Noritaka Yamashita, Munenori Ogura, Jianming Lu, Hiroo Sekiya, Takashi Yahagi   +4 more
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On Reliability and Security of Randomized Detectors Against Sensitivity Analysis Attacks

IEEE Transactions on Information Forensics and Security, 2009
Despite their popularity, spread spectrum schemes are vulnerable against sensitivity analysis attacks on standard deterministic watermark detectors. A possible defense is to use a randomized watermark detector. While randomization sacrifices some detection performance, it might be expected to improve detector security to some extent.
Maha El Choubassi, Pierre Moulin
openaire   +1 more source

Generating an Approximately Optimal Detector Set by Evolving Random Seeds

2009 Eighth IEEE International Conference on Dependable, Autonomic and Secure Computing, 2009
The detector generation algorithm is the core of a Negative Selection Algorithm (NSA). In most previous work, the NSAs generate the detector set randomly, which cannot guarantee to obtain an efficient detector set. To generate an approximately optimal detector set, in this paper, a novel detector generation algorithm for the Real-Valued Negative ...
Jie Zhang, Wenjian Luo, Baoliang Xu
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An efficient and computationally effective random valued impulse noise detector

2013 International Conference on Advances in Computing, Communications and Informatics (ICACCI), 2013
The paper proposes an efficient and computationally effective method for detecting random valued impulse noise of images, corrupted with high density. The method works in two stages of operation. The first stage of operation identifies the possible candidates for noisy pixels through the decision boundaries along with some prior knowledge. Second stage
Brijraj Singhawat, Saroj K. Meher
openaire   +1 more source