Results 31 to 40 of about 7,461 (155)

Power transformer dissolved gas analysis through Bayesian networks and hypothesis testing [PDF]

, 2018
Accurate diagnosis of power transformers is critical for the reliable and cost-effective operation of the power grid. Presently there are a range of methods and analytical models for transformer fault diagnosis based on dissolved gas analysis.
Aizpurua, Jose Ignacio, Ampofo, Bismark, Catterson, Victoria M., Cross, James G., Lambert, Brandon, McArthur, Stephen D. J., Pereira, Gavin, Stewart, Brian G.   +7 more
core   +1 more source

On column density thresholds and the star formation rate [PDF]

, 2014
We present the results of a numerical study designed to address the question of whether there is a column density threshold for star formation within molecular clouds. We have simulated a large number of different clouds, with volume and column densities
Clark, Paul C., Glover, Simon C. O.
core   +1 more source

A Dynamic Adam Based Deep Neural Network for Fault Diagnosis of Oil-Immersed Power Transformers

Energies, 2019
This paper presents a Dynamic Adam and dropout based deep neural network (DADDNN) for fault diagnosis of oil-immersed power transformers. To solve the problem of incomplete extraction of hidden information with data driven, the gradient first-order ...
Minghui Ou, Hua Wei, Yiyi Zhang, Jiancheng Tan   +3 more
doaj   +1 more source

Methanol maser associated outflows: detection statistics and properties [PDF]

, 2014
We have selected the positions of 54 6.7 GHz methanol masers from the Methanol Multibeam Survey catalogue, covering a range of longitudes between 20° and 34° of the Galactic plane.
A. Chrysostomou, Arce, Bachiller, Bally, Bergin, Beuther, Beuther, Beuther, Bonnell, Bonnell, Bontemps, Brand, Breen, Breen, Bronfman, Buckle, Buckle, Cabrit, Cabrit, Cabrit, Caswell, Caswell, Cavanagh, Cesaroni, Cesaroni, Chambers, Chen, Chrysostomou, Churchwell, Churchwell, Clarke, Clemens, Codella, Codella, Contreras, Csengeri, Curtis, Cyganowski, Cyganowski, D. Ward-Thompson, Davis, De Buizer, De Buizer, Dent, Downes, Dunham, Ellingsen, Fish, Frerking, Garden, Goldsmith, Gottschalk, Green, Green, H. M. de Villiers, Hatchell, Hatchell, Henning, Herbst, Hofner, J. S. Urquhart, Jijina, Kim, Konigl, Krumholz, Krumholz, Kuiper, Kurtz, Lada, López-Sepulcre, M. A. Thompson, M. G. Burton, McKee, Menten, Minchin, Minier, Minier, Minier, Molinari, Molinari, Molinari, Moore, Mottram, Narayanan, Norberg, Ortega, Parker, Parsons, Pestalozzi, Purcell, Reid, Richer, Ridge, Rodriguez, Roman-Duval, S. L. Breen, S. P. Ellingsen, Schuller, Shepherd, Shepherd, Shu, Shu, Shu, Shu, Simon, Smith, Smith, Snell, Sobolev, Sridharan, Stahler, Su, Szymczak, Sánchez-Monge, T. Csengeri, Takahashi, Tomisaka, Urquhart, Urquhart, Urquhart, Urquhart, Urquhart, van der Marel, van der Walt, van der Walt, Walsh, Williams, Williams, Wilson, Wolfire, Wu, Wu, Wu, Xu, Xu, Yorke, Zapata, Zhang, Zhang, Zinnecker   +139 more
core   +4 more sources

Intelligent Fault Detection of MV/HV Transformers Using Fuzzy Logic Based on DGA

Eng
Dissolved Gas Analysis (DGA) of power system transformers has emerged as one of the most effective transformer health diagnosing tools by analyzing the gases dissolved in the insulating oil.
Lone Larona Mogotsi, Akhtar Rasool, Edwin Matlotse, Sadaqat Ali, Ahmed Ali   +4 more
doaj   +1 more source

Analysis of the distribution of HII regions in external galaxies. IV The new galaxy sample. Position and Inclination angles [PDF]

, 2002
We have compiled a new sample of galaxies with published catalogs of HII region coordinates. This sample, together with the former catalog of Garcia-Gomez and Athanassoula (1991) will form the basis for subsequent studies of the spiral structure in disc ...
Aguerri, Alonso-Herrero, Arsenault, Athanassoula, Atherton, Baldwin, Balkowski, Ball, Baumgart, Becker, Beckman, Begeman, Begeman, Bergeron, Blackman, Blackman, Blackman, Blackman, Blackman, Blackman, Boroson, Bosma, Bosma, Bosma, Bottema, Burbidge, Burbidge, Burbidge, Burbidge, Burbidge, Burbidge, Burbidge, Burbidge, Buta, Buta, Buta, Buta, Buta, C. Barberà, C. García-Gómez, Carranza, Chincarini, Chincarini, Comte, Comte, Considère, Considère, Corbelli, Corradi, Courtés, Crocker, de Jong, de Vaucouleurs, de Vaucouleurs, Deul, Dickson, Duval, E. Athanassoula, Elmegreen, Evans, Feinstein, Fridman, García-Gómez, García-Gómez, Goad, González Delgado, Gottesman, Grosbøl, Grosbøl, Guhatakurta, Hackwell, Helfer, Hodge, Hodge, Hunt, Hutchmeier, Hutchmeier, Héraudeau, Iye, Kaneko, Kaneko, Kaneko, Kennicutt, Knapen, Knapen, Knapen, Knapen, Koribalski, Laine, Listz, Lu, Marcelin, Mathewson, Maucherat, Meyssonier, Milliard, Monnet, Mulder, Newton, Okamura, Ondrechen, Oosterloo, Peletier, Pellet, Pence, Pence, Petit, Petit, Planesas, Prieto, Puerari, Roberts, Rodrigues, Rogstad, Rots, Rozas, Rozas, Rozas, Rozas, Rubin, Rubin, Ryder, Schmitt, Scowen, Stocke, Sánchez-Portal, Thean, Thonnard, Tsvetanov, Tully, van Albada, van Albada, van der Hulst, van der Kruit, van der Kruit, van der Kruit, von Linden, Warner, Weiner, Weliachew, Wevers, Wilke, Wong, Zasov   +143 more
core   +2 more sources

How effective are entomopathogenic nematodes for vine weevil (Coleoptera: Curculionidae) biological control? A meta‐analysis

Pest Management Science, EarlyView.
Entomopathogenic nematodes provide reliable biological control of vine weevil larvae, reducing populations by 63% on average. All five tested species are effective, with temperature (18–30 °C) being the strongest predictor of success. Abstract BACKGROUND Vine weevil (Otiorhynchus sulcatus) is a globally important pest of soft fruit and ornamental crops
Joe M. Roberts, Marco Corradi, Ben J. Clunie, Eugenia Fezza, W. Edwin Harris, Tom W. Pope   +5 more
wiley   +1 more source

Inefficient star formation through turbulence, magnetic fields and feedback

, 2015
Star formation is inefficient. Only a few percent of the available gas in molecular clouds forms stars, leading to the observed low star formation rate (SFR). The same holds when averaged over many molecular clouds, such that the SFR of whole galaxies is
Federrath, Christoph
core   +1 more source

Conformally Equivariant Quantization - a Complete Classification [PDF]

, 2011
Conformally equivariant quantization is a peculiar map between symbols of real weight $\delta$ and differential operators acting on tensor densities, whose real weights are designed by $\lambda$ and $\lambda+\delta$.
Michel, Jean-Philippe
core   +6 more sources

Overcoming barriers? The mixed results of social innovation accelerator programs for women entrepreneurs

Strategic Management Journal, EarlyView.
Abstract Research Summary Entrepreneurship accelerators are increasingly promoted as structural interventions to close gender gaps, yet studies have not established a differential impact of participation for women. This prior evidence—drawn from high‐tech, male‐dominated settings—may overlook how outcomes differ in more feminized domains such as social
Nilanjana Dutt, Sarah Kaplan
wiley   +1 more source