Results 21 to 30 of about 239,679 (268)
Optimal flow pattern around hybrid groins with various orientations to improve fish habitat via Experimental Investigation using Acoustic Doppler Velocimeter [PDF]
SVU-International Journal of Engineering Sciences and Applications, 2023 Given the growing interest in river restoration and natural river improvement, groins are recommended as an essential hydraulic component for creating riparian habitats and controlling local flow.
Mona Mostafa +3 more
doaj +1 more source
Optimization of the Receiving Orientation Angle for Zero-Forcing Precoding in VLC [PDF]
IEEE Communications Letters, 2021 We study the performance of linear zero-forcing (ZF) precoding in multiuser multiple-input single-output visible light communications (VLC) when we are able to select the receiving orientation angle (ROA) of each user. For radio-frequency communications, the non-line-of-sight rich scattering environment usually ensures the linear independence among ...
Maximo Morales-Cespedes +2 more
openaire +5 more sources
Information, 2016 Passive positioning systems with a small aperture array exhibit poor accuracy of target estimation under strong interference in near-field environments. To improve this accuracy, we propose a novel cross localization algorithm for direction-finding using
Penghao Xu, Bing Yan
doaj +1 more source
Design and test of head and tail orientation device for crayfish
Shipin yu jixie, 2022 Objective: To solve the difficulty of head and tail orientation in crayfish mechanized treatment. Methods: A crayfish head and tail orientation method was proposed by using the difference of crayfish head and tail shape, which was composed of a roller ...
FU Run-ze +4 more
doaj +1 more source
The design of fall detection algorithm based on multi-feature analysis
上海师范大学学报. 自然科学版, 2017 In view of the shortcomings of high detection error rate of the existing fall detection algorithm,an improved fall detection algorithm is proposed.First,the Gaussian mixture model is used to detect the foreground object,and then median filtering and ...
Gao Miao, Zhu Sulei
doaj +1 more source
Quantitative outperforms visual assessment of nonparallel orientation in ultrasound breast imaging reporting and data system [PDF]
PeerJObjective The visual assessment of the “nonparallel orientation” descriptor in the ultrasound Breast Imaging Reporting and Data System (BI-RADS) is subjective and may affect both the accurate interpretation of breast masses and the overall diagnostic ...
Kailiang Chen, Qingfang Chen, Size Wu
doaj +2 more sources
A Preferred Orientation Angle for Bipolar Planetary Nebulae
Galaxies, 2020 We present preliminary results from measuring Galactic orientation angles of 766 elliptical and bipolar Planetary Nebulae (PNe) in the Hong Kong/Australian Astronomical Observatory/Strasbourg Observatory H-alpha Planetary Nebula research platform and ...
Andreas Ritter, Quentin A. Parker
doaj +1 more source
Phase-fi eld simulation of competitive growth of grains in a binary alloy during directional solidifi cation [PDF]
China Foundry, 2018 Taking Al-2%mole-Cu binary alloy as an example, the infl uence of grain orientation on competitive growth of dendrites under different competitive modes was investigated by using the three-dimensional (3-D) phasefi eld method.
*Li Feng, Ya-long Gao, Ni-ni Lu
doaj +1 more source
Thermal Performance of Film Cooling for Two Staggered Rows of Circular Jet [PDF]
Engineering and Technology Journal, 2013 The holes orientation and jet inclination angles are important parameters that control the development of the flow structures and the penetration and spreading of the jets.
Assim H. Yousif +2 more
doaj +1 more source
AN ANGLE SENSE IN THE ORIENTATION OF A MILLIPEDE
The Biological Bulletin, 1965 1. The millipede, Trigoniulus lumbricinus, when forced to crawl through a corridor containing an abrupt turn, tended to turn upon emergence from the corridor at an angle which was opposite and approximately equal to the angle of the forced turn.2. The response held for forced angles ranging in size up to at least 120°. For forced turns greater than 60°
openaire +2 more sources