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Search Results: 1 - 10 of 32748 matches for " DANIEL ALBU "
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REDUCED-PARTS SINGLE-PHASE UNINTERRUPTIBLE POWER SUPPLY
DANIEL ALBU
Journal of Electrical and Electronics Engineering , 2008,
Abstract: Reducing the number of switches andpassive elements in uninterruptible power supplytopologies not only reduces the cost of the wholesystem but also provides some other advantagessuch as greater compactness, smaller weight, andhigher reliability. Generally, the largest costreduction is achieved by reducing the number ofswitches employed in a converter power circuit.Another way of reducing the cost of converters is touse a topology that allows replacing activeswitches, such as IGBTs, MOSFETs, andthyristors, with diodes. Diodes are less expensivethan active switches and apart from this, there isalso a cost reduction from eliminating all thecircuitry for driving active switches.
Hybrid Active Power Filter Connected to a Photovoltaic Array
R?zvan-Daniel Albu,Daniel Albu
Journal of Electrical and Electronics Engineering , 2009,
Abstract: The existence of nonlinear loads in the utility has been increasing at an unprecedented pace in recent years. These types of loads draw non-sinusoidal currents from the mains, causing harmonic distortion. Active Power Filters have been intensively explored in the past decade. Various topologies and control schemes have been documented aiming at reducing the cost and improving the performance of the compensation system. Hybrid active filters inherit the efficiency of passive filters and the improved performance of active filters, and thus constitute a viable improved approach for harmonic compensation. This paper presents a single-phase hybrid active power filter connected to a photovoltaic array. The uniqueness of the proposed scheme is the fact that it improves the filtering performance of the conventional shunt active power filter, as well as simultaneously supplies the power from the photovoltaic array to the load. The compensation current reference estimation is based on the extension instantaneous reactive-power theorem. Simulation results obtained in laboratory confirmed the validity and effectiveness of the proposed scheme are presented.
An Ensemble with Encoded Inputs Arbitrated By a Recurrent Neural Network for Web Services Reliability Prediction
ALBU Razvan-Daniel
Journal of Electrical and Electronics Engineering , 2012,
Abstract: The rapid expansion of information technologies in almost all sectors of the society induces software in our days. Software reliability prediction becomes a very important research subject because itnot just improves software quality but also can reduces development cost. In this study, I developed a neural network based ensemble and used it to predict response time of real-world web services.
REDUCED-PARTS THREE-PHASE UNINTERRUPTIBLE POWER SUPPLY
DANIEL ALBU,DR?GHICIU NICOLAE,R?ZVAN DANIEL ALBU
Journal of Electrical and Electronics Engineering , 2008,
Abstract: In this paper, a three-phase on-lineuninterruptible power supply with reducednumber of switches topology is presented. The newtopology has less number of power electronicdevices as well as control functions. Differentoperating modes of the system are investigated aswell. Simulation and experimental results arepresented, which show the viability of the proposedtopology.
Human Face Recognition Using Convolutional Neural Networks
R?zvan-Daniel Albu
Journal of Electrical and Electronics Engineering , 2009,
Abstract: In this paper, I present a novel hybrid face recognition approach based on a convolutional neural architecture, designed to robustly detect highly variable face patterns. The convolutional network extracts successively larger features in a hierarchical set of layers. With the weights of the trained neural networks there are created kernel windows used for feature extraction in a 3-stage algorithm. I present experimental results illustrating the efficiency of the proposed approach. I use a database of 796 images of 159 individuals from Reims University which contains quite a high degree of variability in expression, pose, and facial details.
Novel drug-delivery systems for patients with chronic rhinosinusitis
Albu S
Drug Design, Development and Therapy , 2012, DOI: http://dx.doi.org/10.2147/DDDT.S25199
Abstract: vel drug-delivery systems for patients with chronic rhinosinusitis Review (3629) Total Article Views Authors: Albu S Published Date May 2012 Volume 2012:6 Pages 125 - 132 DOI: http://dx.doi.org/10.2147/DDDT.S25199 Received: 28 March 2012 Accepted: 17 April 2012 Published: 31 May 2012 Silviu Albu Department of Otolaryngology, University of Medicine and Pharmacy Cluj-Napoca, Cluj-Napoca, Romania Abstract: Chronic rhinosinusitis, one of the most common chronic medical complaints in the United States, seems to be increasing in incidence and prevalence, and has a significant impact on quality of life. Topical forms of medical therapy represent an attractive alternative for drug delivery to the nasal cavity and paranasal sinuses. Topical drug delivery has the advantage of directly acting on the site of inflammation, producing a higher concentration at the target site while avoiding systemic side effects. Although considerable research has been undertaken into improving nasal formulations in order to enhance absorption, little attention has so far been directed to upgrading the delivery devices. The aim of this review is to present current knowledge on the novel drug-delivery devices in use in the management of chronic rhinosinusitis patients, and to present the current available knowledge on topical drug penetration into the sinuses using various delivery devices. Additionally, methods used to enhance fluid sinus deposition are presented and the published clinical studies on the results of nebulized antibiotics in the treatment of chronic rhinosinusitis patients are discussed.
Novel drug-delivery systems for patients with chronic rhinosinusitis
Albu S
Drug Design, Development and Therapy , 2012,
Abstract: Silviu AlbuDepartment of Otolaryngology, University of Medicine and Pharmacy Cluj-Napoca, Cluj-Napoca, RomaniaAbstract: Chronic rhinosinusitis, one of the most common chronic medical complaints in the United States, seems to be increasing in incidence and prevalence, and has a significant impact on quality of life. Topical forms of medical therapy represent an attractive alternative for drug delivery to the nasal cavity and paranasal sinuses. Topical drug delivery has the advantage of directly acting on the site of inflammation, producing a higher concentration at the target site while avoiding systemic side effects. Although considerable research has been undertaken into improving nasal formulations in order to enhance absorption, little attention has so far been directed to upgrading the delivery devices. The aim of this review is to present current knowledge on the novel drug-delivery devices in use in the management of chronic rhinosinusitis patients, and to present the current available knowledge on topical drug penetration into the sinuses using various delivery devices. Additionally, methods used to enhance fluid sinus deposition are presented and the published clinical studies on the results of nebulized antibiotics in the treatment of chronic rhinosinusitis patients are discussed.Keywords: paranasal sinuses, topical therapy, nebulized antibiotics, clinical trials
Labour Mobility in Nowadays Europe and Its Role in Economic Development
Ioana ALBU
Journal of Identity and Migration Studies , 2008,
Abstract: “Worker mobility is a key instrument for an efficiently functioning single market and is essential for allowing more people to find better employment, a key objective of the Lisbon Strategy”, as it is stipulated by the Communication from the Commission to the EP, the Council, the ECOSOC and CoR in Mobility, an instrument for more and better jobs: The European Job Mobility Action Plan (2007-2010). Job mobility has been significantly affected by technological change, by changes in education patterns, and by structural unemployment. The mobility of labour force in EU member states is hardly moving. ‘Creating jobs to people’* has been the focus of attention and debate within politicians, economists, experts in the field and policy- makers in the EU of 27, in order to contribute to a more even economic development at the level of regions, given the disparities between poorer regions of Europe and richer ones. Overcoming barriers, such as the cultural and language barrier, in the way of the free movement of people and especially the work force and creating an improved standard of living, diminishing income differences and regional differences in Europe does pose a real challenge for the EU of 27.
C. S. Lewis, The Abolition of Man
Rodica Albu
Journal for the Study of Religions and Ideologies , 2006,
Abstract: Review
C. S. Lewis, The Abolition of Man
Rodica Albu
Journal for the Study of Religions and Ideologies , 2006,
Abstract: C. S. Lewis, The Abolition of Man HarperCollins Publishers, New York, 2001.
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