نتایج جستجو برای: lfo

تعداد نتایج: 134  

Journal: :RSF: The Russell Sage Foundation Journal of the Social Sciences 2022

The relationship between criminal legal involvement and housing is complex because the causal arrow goes both ways. Research documents a homelessness-incarceration nexus whereby homelessness criminalized, incarceration leads to homelessness. In this article, we broaden scope of outcomes by considering instability more generally shift focus financial obligations (LFOs) as specific kind sanction,...

This paper presents a method for damping of low frequency oscillations (LFO) in a power system. The powersystem contains static synchronous series compensators (SSSC) which using a chaotic harmony searchalgorithm (CHSA), optimizes the lead-lag damping stabilizer. In fact, the main target of this paper isoptimization of selected gains with the time domain-based objective function, which is solve...

Journal: :IEEE Access 2021

Global warming and the desire to increase use of clean energy have led increasing installation operation renewable power plants (REPPs), especially large-scale photovoltaic (PV) farms (LPFs). Given that LPFs are added system or replace conventional plants, they must be able perform basic tasks synchronous generators (SGs). One these is ability mitigate low-frequency oscillation (LFO) risk. Also...

Journal: :IEEE Transactions on Sustainable Energy 2022

This paper presents a dynamic analysis for ultra-low frequency oscillations (ultra-LFOs) observed in the wind-hydropower hybrid systems. In such systems, DFIG wind turbines (WTs) are required to be frequency-responsive with providing inertia and support. First, this establishes an analytical model capture dynamics of WTs at electromechanical timescale. A systematic is then conducted on 2-machin...

Journal: :Linköping electronic conference proceedings 2022

With the ever-increasing incorporation of wind and solar power in electric system, enhanced performance classical bulk hydropower plants for robust operation system is required. This current energy transition may cause a rapid increase undesirable low-frequency oscillations (LFOs) modern operations. A stabilizer (PSS) located at one solution to damp such oscillations. paper presents new method ...

Ali Muhammad Amina Zuberi, Shamim Akhtar Zahid Majeed, Zainab Ajab

Skeletal deformities seriously relegate the biological performance of fish. The frequency of occurrence of different types of meristic variations and skeletal deformities were shown in population of Mahseer fish, Tor putitora, in two main reservoirs; Korang stream, Islamabad and Dhobi Ghat stream, Hassan Abdal. Total of ninety-five fishes were caught randomly, forty-five from the unpolluted Kor...

The aim of this paper is to investigate a novel approach for output feedback damping controller design ofSTATCOM in order to enhance the damping of power system low frequency oscillations (LFO). The design ofoutput feedback controller is considered as an optimization problem according with the time domain-basedobjective function which is solved by a honey bee mating optimization algorithm (HBMO...

Journal: :Journal of Biomedical Optics 2023

SignificanceLow-frequency oscillations (LFOs) (<0.1 Hz) with respect to cerebral blood flow (CBF) have shown promise as an indicator of altered neurologic activity in the abnormal brain. Portable optical instruments evolved offer a noninvasive alternative for continuous CBF monitoring at bedside compared many large neuroimaging modalities. However, their utilization acquiring LFOs has only been...

Journal: :Advances in experimental medicine and biology 2008
Terence S Leung Martin M Tisdall Ilias Tachtsidis Martin Smith David T Delpy Clare E Elwell

Oxy- (HbO2) and deoxy- (HHb) haemoglobin signals measured by near infrared (NIR) spectroscopy over the human frontal lobes frequently contain respiratory and low frequency oscillations (LFOs). It has been suggested previously that venous oxygen saturation (SvO2) can be calculated from these respiratory oscillations. In this paper, we investigated the use of a Fourier transform based algorithm t...

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