Results 281 to 290 of about 2,656,564 (343)
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Passivation and Localized Corrosion
1991A review is made of the main models proposed for the passive state, and also for the breakdown of passivity leading to localized forms of corrosion like pitting and crevice corrosion. Some particular aspects of crevice corrosion are analysed and the use of electrochemical techniques for its study is illustrated, like potential and current monitoring ...
Mário G. S. Ferreira +1 more
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Precision-improved Passive Localization Method in the Underwater Multipath Environment
International Conference on Signal Processing, Communications and Computing, 2019As a fundamental technology, localization plays a crucial role in the underwater wireless systems, which have been widely used in target tracking, disaster prevention and military domain.
G. Fang, Hui-fang Chen, Lei Xie
semanticscholar +1 more source
Multi-Sensor Passive Localization Based on Sensor Selection
Fusion, 2019In passive localization applications, the positioning accuracy for an emitter is highly dependent on the geometry between sensors and the target, the site error and measurement noise of sensors.
Wen Ma, Hongyan Zhu, Yan Lin
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Moving Source Localization in Passive Sensor Network With Location Uncertainty
IEEE Signal Processing Letters, 2021This letter focuses on the passive localization of a moving source in the presence of random sensor location errors. We propose a modified two-stage closed-form method that takes the sensor location errors into account, utilizing time difference of ...
Z. Mao, Hongtao Su, Bin He, Xinchen Jing
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SWIM: Speed-Aware WiFi-Based Passive Indoor Localization for Mobile Ship Environment
IEEE Transactions on Mobile Computing, 2021Accurate and pervasive device-free indoor localization with meter-level resolution is critical for large cruise and passenger ships due to safety-critical rescue and evacuation requirements when accidents occur.
Mozi Chen +5 more
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Passive Immunization against the Local Shwartzman Reaction
The Journal of Immunology, 1972Abstract Passive immunization with rabbit antiserum to endotoxin prevented the Shwartzman reaction due to homologous and heterologous endotoxins. Homologous protection lasted at least 1 month, was conferred with the 19S fraction, and was accompanied by accelerated clearance of radioactive endotoxin from the circulating blood ...
A I, Braude, H, Douglas
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Manatee position estimation by passive acoustic localization
The Journal of the Acoustical Society of America, 2007Passive sound source localization with sensor arrays is based on the estimation of the time difference of arrival (TDOA), and precise TDOA is required to achieve accurate position estimation. For a majority of practical localization systems (based on TDOA estimation with four sensors in two dimensions), only three time delays are computed to determine ...
Paulin Buaka, Muanke +1 more
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Passive localization from Doppler shifted frequency measurements
[Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991An efficient search scheme for an underwater radiating source is developed by introducing intermediate variables which are products of some of the unknowns. The search dimension is only two, in x-y position, instead of five. The resultant intermediate equations become linear and are easier to solve; the major calculation at each grid point requires an ...
Y.T. Chan, J.J. Towers
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Practical Passive Indoor Localization With Intelligent Reflecting Surface
IEEE Transactions on Mobile ComputingIntelligent reflecting surface has gained significant attention for supporting integrated sensing and communication (ISAC) by manipulating wireless signals. However, existing IRS-based sensing systems commonly utilize directional horn antennas for signal
Ganlin Zhang +5 more
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CSI Based High Accuracy Device Free Passive Localization System
IEEE Vehicular Technology Conference, 2018A new radio frequency fingerprint that incorporates the channel impulse response and Angle of Arrival was introduced to enhance the accuracy of the indoor positioning. To use the new fingerprint.
Yuge Liu +3 more
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