Results 31 to 40 of about 2,359,536 (201)

A new approach to tolerance analysis based on tracking local coordinate systems

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2017
Among current approaches to tolerance analysis in three-dimensional space, the Matrix method based on rigid body kinematics is widely used. However, this method ignores the impact a tolerance feature (TF) may get from the variations of TFs before it ...
Xiaochen ZHAI   +5 more
doaj   +1 more source

Surrogate-Model-Based Interval Analysis of Spherical Conformal Array Antenna with Power Pattern Tolerance

open access: yesSensors, 2022
A method based on an interval arithmetic is proposed to analyze uncertain factors such as the curvature radii, excitation amplitude, and excitation phase of a spherical conformal array antenna.
Guangda Ding   +4 more
doaj   +1 more source

Biomechanical Tolerance of Whole Lumbar Spines in Straightened Posture Subjected to Axial Acceleration [PDF]

open access: yes, 2017
Quantification of biomechanical tolerance is necessary for injury prediction and protection of vehicular occupants. This study experimentally quantified lumbar spine axial tolerance during accelerative environments simulating a variety of military and ...
Baisden, Jamie L.   +9 more
core   +2 more sources

PDF reweighting in the Hessian matrix approach [PDF]

open access: yes, 2014
We introduce the Hessian reweighting of parton distribution functions (PDFs). Similarly to the better-known Bayesian methods, its purpose is to address the compatibility of new data and the quantitative modifications they induce within an existing set of
Paukkunen, Hannu, Zurita, Pia
core   +2 more sources

Performance Analysis of Multiple Antennas Synthetic False Target Jamming

open access: yesIEEE Access, 2022
The radar jamming technology has been studied in this paper mainly, which uses the antenna synthetic wave to generate phase distortion at the signal reception to carry out angle measuring jamming, such as traditional cross-eye jamming. However, cross-eye
Yuhang Ning, Mengxia Yu
doaj   +1 more source

Analysis of operating system diversity for intrusion tolerance [PDF]

open access: yes, 2013
One of the key benefits of using intrusion-tolerant systems is the possibility of ensuring correct behavior in the presence of attacks and intrusions. These security gains are directly dependent on the components exhibiting failure diversity.
Abd-El-Malek   +34 more
core   +1 more source

Tolerance Design and Robust Study for The Joint Clearances of Landing Gear Retraction Mechanisms

open access: yesApplied Sciences, 2020
Joint clearances inevitably affect the kinematic accuracy and robustness of landing gear retraction mechanisms. However, the complexity and uncertainty of the clearances lead to difficulty in establishing mathematic models and analyzing effects.
Li Zhang, Hong Nie, Xiaohui Wei
doaj   +1 more source

Analysis of infrared polarization imaging characteristics based on long wave infrared zoom system

open access: yesFrontiers in Physics, 2023
In order to meet the requirements of target detection at different distances in infrared polarization detection, a transmission-type long-wave infrared polarization zoom optical system is designed, can zoom in 18–90 mm and the wavelength range is 8–14 μm.
Qiang Fu   +14 more
doaj   +1 more source

Breeding drought tolerant cowpea: constraints, accomplishments, and future prospects [PDF]

open access: yes, 2009
This review presents an overview of accomplishments on different aspects of cowpea breeding for drought tolerance. Furthermore it provides options to enhance the genetic potential of the crop by minimizing yield loss due to drought stress. Recent efforts
Agbicodo, A.C.M.E.   +4 more
core   +2 more sources

Multiple Solutions Starting from Real Shaped Beams in Equispaced Linear Arrays

open access: yesSensors, 2020
In the present work, the theoretical basis of the multiplicity of solutions obtained from an initial real symmetric distribution is derived. This initial solution is devoted to generating an equivalent pure real shaped-beam pattern for a concrete ...
Aarón Ángel Salas-Sánchez   +5 more
doaj   +1 more source

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