Results 91 to 100 of about 5,328,241 (239)

Feature Congestion and Subband Entropy measures of visual clutter

open access: yes, 2007
This MATLAB software implements two measures of visual clutter described in our Journal of Vision 2007 paper in the special issue on crowding. The remaining measure described in that paper, Edge Density, is only two lines of MATLAB code and is fully ...
Nakano, Lisa   +2 more
core  

Space-time Two-dimensional Clutter Suppression Method Based on Subarray Beam Pattern Design

open access: yesLeida xuebao
Airborne radar receivers that utilize subarray processing face challenges owing to the complex space-time coupling distribution caused by grating-lobe clutter.
Fuhai WAN   +3 more
doaj   +1 more source

A Novel Adaptive Ground Clutter Removal Algorithm for High Range Resolution MMW Radar

open access: yes, 2008
In this paper we present a novel adaptive ground clutter removal algorithm for high range resolution MMW-radar application where the dielectric contrast between the air and the ground material is close to or even higher than that between the target and ...
Ma Y(马钺)   +8 more
core   +1 more source

Amplitude Suppression of Nongaussian Sea Clutter in a Coherent Bandpass Path of the Receiver

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2016
The method of non-linear amplitude suppression of radar clutter from a sea surface in the coherent band path of the receiver is considered. The model of the most adequate nongaussian radar clutter from the rough sea surface which envelope is based on K ...
E. A. Milashchenko, A. A. Yazovsky
doaj  

Vertical variation in flight activity of the lesser short-tailed bat in podocarp and beech forests, Central North Island, New Zealand [PDF]

open access: yes, 2013
Designing robust monitoring programmes for cryptic species is particularly difficult. Not detecting a species does not necessarily mean that it is absent from the sampling area. A conclusion of absence made in error can lead to misguided inferences about
Molles, L   +5 more
core   +1 more source

An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)

open access: yesThe Anatomical Record, EarlyView.
Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley   +1 more source

Computational fluid dynamics simulations of airflow through the nasal passages of rhinolophoid bats

open access: yesThe Anatomical Record, EarlyView.
Abstract The nasal passages of bats that emit their echolocation call through their nostrils have adapted for sound emission as well as standard respiratory and olfactory functions. Rhinolophids, hipposiderids and rhinonycterids all use a high duty cycle (HDC) echolocation strategy.
Carley Goodwin   +7 more
wiley   +1 more source

Signal Processing Methods to Improve Ocean Surface Wave Estimation from a High Frequency Surface Wave Radar [PDF]

open access: yes, 2011
High frequency surface wave radars are operated as a remote sensor to measure ocean surface parameters to ranges exceeding 200-300 km from the coastline.
Wang, Wei
core   +1 more source

Me and pa in Florida. [PDF]

open access: yes, 1925
Humorous travelogue written in dialect describing a trip through Florida from Jacksonville to Key West.https://stars.library.ucf.edu/floridaheritage/1128/thumbnail ...
Clutter, Marcia Oral,
core  

Tracheal chambers as a key innovation for high‐frequency emission in bat echolocation

open access: yesThe Anatomical Record, EarlyView.
Abstract Key innovations are pivotal for biodiversity and facilitating evolutionary success, enabling organisms' adaptation to various ecological niches through the diversification of phenotypic traits. In mammals, notable adaptations include evolving hypsodonty for grazing on grasses and, for bats, evolving echolocation and wing acquisition.
Nicolas L. M. Brualla   +7 more
wiley   +1 more source

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