Results 11 to 20 of about 80,393 (300)
A simplified formulation for calculation of minority-carrier effective lifetime
Results in Physics, 2018 An improved simple equation to calculate the minority-carrier effective lifetime in photoconductance measurements is proposed by the perturbation method.
Xiao-Xia Li, Ji-Huan He
exaly +4 more sources
Positron lifetime calculation for the elements of the periodic table
Journal of Physics Condensed Matter, 2007 Theoretical positron lifetime values have been calculated systematically for most of the elements of the Periodic Table. Self-consistent and non-self-consistent schemes have been used for the calculation of the electronic structure in the solid, as well as different parameterizations for the positron enhancement factor and correlation energy.
F Plazaola
exaly +6 more sources
Lifetime Calculation of Irregularly Oscillating Bearings in Offshore Winches [PDF]
Modeling, Identification and Control, 2018 The fatigue lifetime calculation of rolling bearings has been intensively researched in the past and has been well documented in standards. The majority of the conducted research in the field of bearing life expectancy only applies to bearings under ...
Lothar Wöll, Georg Jacobs, Achim Kramer
doaj +2 more sources
Extended Wear Lifetime Calculation for Grease Lubricated Gears in Consideration of Surface Hardness and Roughness [PDF]
MATEC Web of Conferences, 2022 Greases have a variety of advantages when special operating conditions apply for gear lubrication, e. g. improved properties against continuous (or slow speed) wear.
Siewerin Benedikt J. +2 more
doaj +2 more sources
Fatigue lifetime calculation of wind turbine blade bearings considering blade-dependent load distribution [PDF]
Wind Energy Science, 2020 Rotating bearings are some of the most commonly employed machine elements. As such, they are well-understood and thoroughly researched pieces of technology.
O. Menck, M. Stammler, F. Schleich
doaj +2 more sources
Journal of Machine EngineeringThe calculation of the lifespan of profile rail guides is an essential part in the design process of machines. Conventional lifespan models yield good results when calculating lifespan values under a homogeneous distribution of individual rolling contact
Danny Staroszyk +2 more
doaj +3 more sources
The methodology of a part lifetime calculation [PDF]
IOP Conference Series: Materials Science and Engineering, 2020 Abstract Reducing mills in piece-reduction at the moment of capturing the pipe’s front end and on the rear end exit are exposed to increased dynamic loads. However these processes at present time are not fully researched. The relevant problem is to decrease dynamic loads in the clamp engine, to increase reliability and durability of the ...
Chumakova, L. A. +2 more
openaire +3 more sources
Influence of the stress gradient on the fatigue life calculation of a martensitic high strength steel [PDF]
Fracture and Structural Integrity, 2017 Nowadays lifetime calculation in the high cycle fatigue region is commonly based on S/N curves which are modified by different influences to ensure accurate results.
Igor Miloševic +3 more
doaj +4 more sources
Deep Contact Endurance Limit of Surface-Hardened Gears
Механика машин, механизмов и материалов, 2023 The reliability and durability of gears in most cases depend on the contact endurance of the material of the parts. Analysis of the stress state of surface-hardened gears has shown that under contact loading, the source of primary damage can be located ...
Sergei P. Rudenko +2 more
doaj +1 more source
Global, Regional, and Country-Specific Lifetime Risks of Stroke, 1990 and 2016 [PDF]
, 2018 BACKGROUND The lifetime risk of stroke has been calculated in a limited number of selected populations. We sought to estimate the lifetime risk of stroke at the regional, country, and global level using data from a comprehensive study of the prevalence ...
GBD 2016 Lifetime Risk Stroke +1 more
core +5 more sources