Results 61 to 70 of about 5,869,378 (346)

Gather-and-broadcast frequency control in power systems

open access: yes, 2016
We propose a novel frequency control approach in between centralized and distributed architectures, that is a continuous-time feedback control version of the dual decomposition optimization method.
Dörfler, Florian, Grammatico, Sergio
core   +1 more source

Patient‐Level Barriers and Facilitators to Inpatient Physical Therapy in Adolescents and Young Adults With a Hematological Malignancy: A Qualitative Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Despite their increased risk for functional impairment resulting from cancer and its treatments, few adolescents and young adults (AYAs) with a hematological malignancy receive the recommended or therapeutic dose of exercise per week during inpatient hospitalizations.
Jennifer A. Kelleher   +8 more
wiley   +1 more source

Energetic Factors of a Frequency-Controlled Synchronous Electric Drive

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2018
As compared to asynchronous frequency-controlled electric drives, synchronous drives are characterized by lower power losses, rigid mechanical characteristics without speed feedback and by the simplest law of frequency control (when the voltage changes ...
B. I. Firago, S. V. Aleksandrovsky
doaj   +1 more source

Frequency control circuit for all-digital phase-lock loops [PDF]

open access: yes, 1973
Phase-lock loop references all its operations to fixed high-frequency service clock operating at highest speed which digital circuits permit. Wide-range control circuit provides linear control of frequency of reference signal.
Anderson, T. O.
core   +1 more source

Distributed Secondary Frequency Control through MTDC Transmission Systems

open access: yes, 2015
In this paper, we present distributed controllers for sharing primary and secondary frequency control reserves for asynchronous AC transmission systems, which are connected through a multi-terminal HVDC grid.
Andersson, Göran   +4 more
core   +2 more sources

Frequency support scheme of grid‐forming based hybrid cascaded HVDC integrated wind farms

open access: yesIET Generation, Transmission & Distribution
The grid‐following control‐based hybrid cascaded high‐voltage direct current (HC‐HVDC) links may contribute to the worsening of inertia decline and instability issues, especially in situations characterized by a weak grid.
Xiaojie Fan, Yongning Chi, Zhibing Wang
doaj   +1 more source

Developmental Disorders in Children Recently Diagnosed With Cancer

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Neurocognitive deficits in adult survivors of childhood cancer are well established, but less is known about developmental disorders (DD) arising shortly after cancer diagnosis. Using 2016–2019 linked Ohio cancer registry and Medicaid data, we compared DD among 324 children with cancer and 606,913 cancer‐free controls.
Jamie Shoag   +5 more
wiley   +1 more source

A CC/VC‐based power tracking method for photovoltaic inverter operated in voltage control mode

open access: yesIET Power Electronics
The active power control of photovoltaic (PV) inverters without energy storage can flatten the fluctuating power and support the voltage amplitude and frequency of the grid.
ZhenXiong Wang   +6 more
doaj   +1 more source

Rigid-body motion extracted from total motion of a flexible body [PDF]

open access: yes, 1967
Control system eliminates or reduces flexibility effects on the manual and automatic control of large flexible vehicles. It extracts rigid-body and flexible-body motion and adapts well when a flexible-body frequency coincides or nearly coincides with the
Howard, J. C.
core   +1 more source

Optimal control theory of harmonic generation

open access: yes, 2012
Coherent control of harmonic generation was studied theoretically. A specific harmonic order was targeted. An optimal control theory was employed to find the driving field where restrictions were imposed on the frequency band.
Kosloff, Ronnie, Schaefer, Ido
core   +1 more source

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