Results 11 to 20 of about 1,699,991 (339)

Propagation behavior of orbital angular momentum in vector anomalous vortex beams under maritime atmospheric turbulence

open access: yesFrontiers in Physics, 2023
This study explores the propagation properties of orbital angular momentum (OAM) carried by a vector anomalous vortex beam (VAVB) in maritime atmospheric turbulence, utilizing the Rytov approximation.
Hassan T. Al-Ahsab   +6 more
doaj   +1 more source

Multiple optimality properties of the Shewhart test [PDF]

open access: yes, 2014
For the problem of sequential detection of changes, we adopt the probability maximizing approach in place of the classical minimization of the average detection delay, and propose modified versions of the Shiryaev, Lorden and Pollak performance measures.
Moustakides, George V.
core   +1 more source

Comparison of semiautomated bird song recognition with manual detection of recorded bird song samples

open access: yesAvian Conservation and Ecology, 2017
Automated recording units are increasingly being used to sample wildlife populations. These devices can produce large amounts of data that are difficult to process manually.
Lisa A. Venier   +5 more
doaj   +1 more source

An Improved Composite Hypothesis Test for Markov Models with Applications in Network Anomaly Detection [PDF]

open access: yes, 2015
Recent work has proposed the use of a composite hypothesis Hoeffding test for statistical anomaly detection. Setting an appropriate threshold for the test given a desired false alarm probability involves approximating the false alarm probability. To that
Paschalidis, Ioannis Ch., Zhang, Jing
core   +3 more sources

Habitat models to predict wetland bird occupancy influenced by scale, anthropogenic disturbance, and imperfect detection

open access: yesEcosphere, 2017
Understanding species–habitat relationships for endangered species is critical for their conservation. However, many studies have limited value for conservation because they fail to account for habitat associations at multiple spatial scales ...
Wesley J. Glisson   +3 more
doaj   +1 more source

Modeling detection probability to improve marsh bird surveys in southern Canada and the Great Lakes states

open access: yesAvian Conservation and Ecology, 2016
Marsh birds are notoriously elusive, with variation in detection probability across species, regions, seasons, and different times of day and weather.
Douglas C. Tozer   +2 more
doaj   +1 more source

Effects of camera‐trap placement and number on detection of members of a mammalian assemblage

open access: yesEcosphere, 2021
A central goal in camera‐trapping (CT) studies is to maximize detection probability and precision of occupancy estimates while minimizing the number of CTs to reduce equipment and labor costs.
Tim R. Hofmeester   +6 more
doaj   +1 more source

Filter Bank Multi-carrier Waveform Design for Low Probability of Intercepting Joint Radar and Communication System

open access: yesLeida xuebao, 2023
Cyclic prefixes in joint radar and communication systems based on Orthogonal Frequency Division Multiplexing (OFDM) and low probability of interception lead to weak radar echo masking on the battlefield.
Wanlu LI, Zheng XIANG, Peng REN
doaj   +1 more source

Time of Arrival from Bohmian Flow [PDF]

open access: yes, 2002
We develop a new conception for the quantum mechanical arrival time distribution from the perspective of Bohmian mechanics. A detection probability for detectors sensitive to quite arbitrary spacetime domains is formulated.
Aharonov Y   +14 more
core   +4 more sources

Multi-Target Tracking in Multi-Static Networks with Autonomous Underwater Vehicles Using a Robust Multi-Sensor Labeled Multi-Bernoulli Filter

open access: yesJournal of Marine Science and Engineering, 2023
This paper proposes a centralized MTT method based on a state-of-the-art multi-sensor labeled multi-Bernoulli (LMB) filter in underwater multi-static networks with autonomous underwater vehicles (AUVs). The LMB filter can accurately extract the number of
Yuexing Zhang   +5 more
doaj   +1 more source

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