Results 91 to 100 of about 1,300,845 (243)
Graphs with a given conditional diameter that maximize the Wiener index
AIMS MathematicsThe Wiener index $ W(G) $ of a graph $ G $ is one of the most well-known topological indices, which is defined as the sum of distances between all pairs of vertices of $ G $.
Junfeng An , Yingzhi Tian
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International Journal of Electrochemical Science, 2012 Specimens of n-type single crystalline silicon sparsely deposited with silver nano-particles on the Si (100) surfaces were put in 1.0 M NH4F + 5.0 M H2O2 to investigate their dark etching.
J.C. Lin +3 more
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Revisiting two classical results on graph spectra
, 2006 Let mu(G) and mu_min(G) be the largest and smallest eigenvalues of the adjacency matricx of a graph G. We refine quantitatively the following two results on graph spectra. (i) if H is a proper subgraph of a connected graph G, then mu(G)>mu(H).
Nikiforov, Vladimir
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Dynamic Precipitation during High‐Pressure Torsion of a Magnesium–Manganese Alloy
Advanced Engineering Materials, EarlyView.An ultrafine‐grained alloy is produced by high‐pressure torsion of solutionized Mg–1.35 wt% Mn. Precipitation of nanometer‐scale Mn particles during deformation provides pinning sites. This prevents the formation of a bimodal grain structure and results in a finer grain size than for pure Mg.
Julian M. Rosalie, Anton Hohenwarter
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The relationship between diameter and depth of potholes eroded by running water
Journal of Rock Mechanics and Geotechnical Engineering, 2018 Geometrical analyses of 3930 potholes (3565 fluvial potholes, 237 marine potholes and 128 hillside potholes) from 33 localities in the world reveal a consistent, linear relationship: D = Nh + M, where h and D are, respectively, the depth and mean ...
Shaocheng Ji, Le Li, Wei Zeng
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A rotor-mounted digital instrumentation system for helicopter blade flight research measurements [PDF]
A rotor mounted flight instrumentation system developed for helicopter rotor blade research is described. The system utilizes high speed digital techniques to acquire research data from miniature pressure transducers on advanced rotor airfoils which are ...
Haywood, W. S., Jr. +2 more
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OAO-B /To be launched no earlier than 17 November 1970/ - Press kit [PDF]
, 1970 OAO-B mission plans, launch vehicle, launch operations, and ...
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Advanced Engineering Materials, EarlyView.Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt +8 more
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PLoS ONE, 2019 BackgroundPostural orthostatic tachycardia syndrome is a disorder of the autonomic nervous system. Approximately 30% of patients experience orthostatic headaches.
Debora Cipriani +8 more
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Tunnel lining studies II [PDF]
, 1980 In the CRREL tunnel (Fig. B1, B2), sublimation is extremely apparent, but because of the tunnels limited usage it poses no significant problems. However, in an operating mine with forced air ventilation and continuously operating machinery, the problems ...
Johansen, N.I. and Chalich, P.
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