Results 41 to 50 of about 190,075 (318)

Study on the matching rules and control mechanisms between flocculants and slurry settlement characteristics

open access: yesEnvironmental Research Communications, 2023
In order to realise efficient, economic, low carbon and environmentally friendly slurry disposal, floc sedimentation velocity ( S _f ), supernatant volume ( V _s ), water content of bottom mud ( W _b ), supernatant turbidity ( N _s ) and pH value were ...
Wuchao Wang   +4 more
doaj   +1 more source

Helicopter tail rotor orthogonal blade vortex interaction [PDF]

open access: yes, 2004
The aerodynamic operating environment of the helicopter is particularly complex and, to some extent, dominated by the vortices trailed from the main and tail rotors. These vortices not only determine the form of the induced flow field but also interact
Marshall, J.S.   +7 more
core   +1 more source

Orthogonal pulsars as a key test for pulsar evolution [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2020
ABSTRACT At present, there is no direct information about evolution of inclination angle χ between magnetic and rotational axes in radio pulsars. As to theoretical models of pulsar evolution, they predict both the alignment, i.e. evolution of inclination angle χ to 0°, and its counter-alignment, i.e. evolution to 90°.
A V Biryukov   +4 more
openaire   +2 more sources

Orthogonal test analysis. [PDF]

open access: yes, 2019
Orthogonal test analysis.
Xuehui Gan (6948794)   +2 more
core   +1 more source

Validation of the orthogonal tilt reconstruction method with a biological test sample [PDF]

open access: yesJournal of Structural Biology, 2011
Electron microscopy of frozen-hydrated samples (cryo-EM) can yield high resolution structures of macromolecular complexes by accurately determining the orientation of large numbers of experimental views of the sample relative to an existing 3D model. The "initial model problem", the challenge of obtaining these orientations ab initio, remains a major ...
Chandramouli, Preethi   +3 more
openaire   +4 more sources

Research on Rock Breaking Force Prediction Model of PDC Cutter

open access: yesShiyou jixie, 2021
In order to study the influence of cutting parameters of PDC cutter on its stress, an orthogonal test of rock breaking by PDC cutter was designed; based on which, the multiple linear regression prediction model and artificial neural network prediction ...
Li Jin, Yin Zhuo, Liu Zhong, Hou Huihui
doaj  

Theoretical performance analysis of the W-ABORT detector [PDF]

open access: yes, 2008
In a recent paper we introduced a modification of the adaptive beaniformer orthogonal rejection test (ABORT) for adaptive detection of signals in unknown noise, by supposing under the null hypothesis the presence of signals orthogonal to the nominal ...
Orlando, Danilo   +5 more
core   +1 more source

Influence of soil parameters on dynamic compaction: numerical analysis and predictive modeling using GA-optimized BP neural networks

open access: yesFrontiers in Materials
This study analyses the effect of soil parameters (angle of internal friction, cohesion, modulus of elasticity, Poisson’s ratio, density) on the amount of ramming settlement of rammed reinforced foundations and proposes a prediction model for the depth ...
Yu Zhang   +4 more
doaj   +1 more source

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik   +5 more
wiley   +1 more source

Numerical Investigation of the Influence of Foundation Pit Excavation on the Deformation of Underlying Tunnels Based on a Multi-Factor Orthogonal Test

open access: yesBuildings
The excavation of pits will induce the vertical displacement of tunnels and lead to engineering problems. The shape as well as size of a pit, and the complex spatial position relationship between the pit and tunnel will induce different deformation ...
Qingshan Wang   +7 more
doaj   +1 more source

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