نتایج جستجو برای: pqa

تعداد نتایج: 51  

Recognition and classification of Power Quality Distorted Signals (PQDSs) in power systems is an essential duty. One of the noteworthy issues in Power Quality Analysis (PQA) is identification of distorted signals using an efficient scheme. This paper recommends a Time–Frequency Analysis (TFA), for extracting features, so-called "hybrid approach", using incorporation of Multi Resolution Analysis...

Journal: :Advances in radiation oncology 2023

PurposeTo assess physics quality assurance (PQA) practices in less resourced RT-centers to improve of care.MethodsA preliminary study was conducted 2020 thirteen select RT centers six countries and 2021, our team onsite visits all the Ghana, one from initial survey. The included private, two public institutions (denoted Public-1- –2). Follow-up surveys were sent 17 medical physicists site visit...

Journal: :Applied sciences 2021

Identifying groups that share common features among datasets through clustering analysis is a typical problem in many fields of science, particularly post-omics and systems biology research. In respect this, quantifying how measure can cluster or organize intrinsic important since currently there no statistical evaluation ordered is, much noise embedded the resulting clustered vector. Much lite...

Journal: :Energies 2021

Integration of renewable energy resources and conventional grids leads to an increase in power quality issues. These issues require different standards be followed for accurate measurement monitoring various parameters the system. Conventional analyzers (PQAs) are programmed a particular standard cannot reconfigured by end user. Therefore, PQAs meet challenges rapidly changing grid. In this reg...

2009
Mohammed Jaffer Alhaddad

The rapid growth in the size of databases and the advances made in Query Languages has resulted in increased SQL query complexity submitted by users, which in turn slows down the speed of information retrieval from the database. The future of high performance database systems lies in parallelism. Commercial vendors’ database systems have introduced solutions but these have proved to be extremel...

2002
Dhananjay S. Phatak Rory Mulvaney

Web access from mobile devices presents its own unique challenges because of severe resource constraints on the mobile devices (power, form factor, bandwidth, etc.). Hence, instead of reacting to a user’s requests, it would be better to try and predict a user’s actions. This would allow time for the server (on the fixed-wired side) to pre-fetch data and pre-process it into a wireless-friendly f...

Journal: :Journal of cell science 2015
Wentao Deng Daniel B Vanderbilt Chen-Chung Lin Karen H Martin Kathleen M Brundage J Michael Ruppert

The high mobility group box protein SOX9 and the GLI1 transcription factor play protumorigenic roles in pancreatic ductal adenocarcinoma (PDA). In Kras transgenic mice, each of these factors are crucial for the development of PDA precursor lesions. SOX9 transcription is directly regulated by GLI1, but how SOX9 functions downstream of GLI1 is unclear. We observed positive feedback, such that SOX...

Journal: :Biochimica et biophysica acta 1989
R J Shopes D J Blubaugh C A Wraight Govindjee

Higher plants, algae, and cyanobacteria are known to require bicarbonate ions for electron flow from the first stable electron acceptor quinone QA to the second electron acceptor quinone QB, and to the intersystem quinone pool. It has been suggested that in Photosystem II of oxygenic photosynthesis, bicarbonate ion functions to maintain the reaction center in a proper conformation and, perhaps,...

2016
Nicholas A. Nechval Vadims Danovics Natalija Ribakova

The main aim of this paper is to present more accurate stochastic fatigue models for solving the fatigue reliability problems, which are attractively simple and easy to apply in practice for situations where it is difficult to quantify the costs associated with inspections and undetected cracks. From an engineering standpoint the fatigue life of a structure consists of two periods: (i) crack in...

2007
M. Ciafaloni

We propose a matrix evolution equation in (x,k)-space for flavour singlet, unintegrated quark and gluon densities, which generalizes DGLAP and BFKL equations in the relevant limits. The matrix evolution kernel is constructed so as to satisfy renormalization group constraints in both the ordered and antiordered regions of exchanged momenta k, and incorporates the known NLO anomalous dimensions i...

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