Results 11 to 20 of about 22,633 (291)

Probabilistic analysis of stress intensity factor (SIF) and degree of bending (DoB) in axially loaded tubular K-joints of offshore structures [PDF]

open access: yesLatin American Journal of Solids and Structures, 2015
The stress intensity factor (SIF) and the degree of bending (DoB) are among the crucial parameters in evaluating the fatigue reliability of offshore tubular joints based on the fracture mechanics (FM) approach. The value of SIF is a function of the crack
Hamid Ahmadi, Amirreza Ghaffari
doaj   +2 more sources

Treća životna dob danas

open access: yesDijete, vrtić, obitelj : Časopis za odgoj i naobrazbu predškolske djece namijenjen stručnjacima i roditeljima, 2008
Budući da u suvremenom svijetu starost, odnosno zrela životna dob, ima posve drugi status u odnosu na negdašnja vremena, bitno se promijenila i uloga djedova i baka u životu djece. Članak će poslužiti odgajateljima i roditeljima kako bi se bolje razumjele potrebe starijih ljudi koje imaju utjecaj na obitelj i na odnose među njezinim članovima.
Špan, Maja, Maja Špan
openaire   +3 more sources

Met DOB duurzamer onkruidbeheer

open access: yes, 2004
Voor het beheer van verharde oppervlakken wordt hier aandacht geschonken aan de betekenis en de voordelen van toepassing van DOB: Duurzaam OnkruidBeheer op ...
Kempenaar, C.
openaire   +2 more sources

Distal oblique bundle influence on distal radioulnar joint stability: a biomechanical study

open access: yesScientific Reports, 2023
Chronic instability of the distal radioulnar joint (DRUJ) presents a highly disabling condition. Several surgical techniques have been reported for its treatment.
G. Hohenberger   +3 more
doaj   +1 more source

Modeling the Effects of Drift Orbit Bifurcation on the Magnetopause Shadowing Loss of Radiation Belt Electrons

open access: yesGeophysical Research Letters, 2023
Last closed drift shell (LCDS) has been identified as a crucial parameter for investigating the magnetopause shadowing loss of radiation belt electrons.
Jinbei Huang   +4 more
doaj   +1 more source

Variable Forgetting Factor-Based Adaptive Kalman Filter With Disturbance Estimation Considering Observation Noise Reduction

open access: yesIEEE Access, 2021
This paper addresses the influence reduction of quantization and observation noises in a disturbance observer (DOB) technique. DOB is a disturbance estimation method that makes control systems robust.
Takashi Ohhira   +2 more
doaj   +1 more source

State Space Disturbance Observer Considering Residual Disturbance

open access: yesIEEE Access, 2020
This paper presents a novel disturbance observer (DOB) for overcoming the limitation of uniformly bounded stability in existing DOB-based control systems and to attain asymptotic stability.
Seungkyu Park, Tae Sung Yoon
doaj   +1 more source

Induction motor IFOC based speed-controlled drive with asymptotic disturbance compensation [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2012
This paper presents the design of digitally controlled speed electrical drive, with the asymptotic compensation of external disturbances, implemented by using the IFOC (Indirect Field Oriented Control) torque controlled induction motor.
Stojić Đorđe M., Stojić Milić R.
doaj   +1 more source

Disturbance Observer-Based Control to Guarantee a Sliding Mode Without Sliding Mode Control

open access: yesIEEE Access, 2023
This paper presents a novel disturbance observer (DOB)-based control method to prevent the deterioration of transient response due to disturbances. The proposed method uses sliding mode dynamics without a sliding mode control (SMC) structure and does not
Keonwoo Lee, Jaejun Cha, Seungkyu Park
doaj   +1 more source

Gradient-Descent-Based Learning Gain for Backstepping Controller and Disturbance Observer of Nonlinear Systems

open access: yesIEEE Access, 2023
This paper proposes a gradient-descent-based learning (GL) gain for backstepping controller and disturbance observer (DOB) of nonlinear system. The proposed method consists of the GL gain update law, controller, and DOB.
Sesun You   +3 more
doaj   +1 more source

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