Institution
Warsaw University of Technology
Education•Warsaw, Poland•
About: Warsaw University of Technology is a education organization based out in Warsaw, Poland. It is known for research contribution in the topics: Microstructure & Optical fiber. The organization has 14293 authors who have published 34362 publications receiving 492211 citations. The organization is also known as: Warsaw Polytechnic & Politechnika Warszawska.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this paper, the ground state properties of superheavy elements with 108 ⩽ Z⩽ 128 and 150 N ⎽ 192 were investigated using both the Skyrem-Hartree-Fock method with a density-independent contact pairing interaction and the macroscopic-microscopic approach with an average Woods-Saxon potential and a monopole pairing interaction.
313 citations
••
TL;DR: In this article, the authors show that four-particle correlation analyses can reliably separate flow and non-flow correlation signals, with the latter account for on average about 15 percent of the observed second-harmonic azimuthal correlation.
Abstract: Elliptic flow holds much promise for studying the early-time thermalization attained in ultrarelativistic nuclear collisions. Flow measurements also provide a means of distinguishing between hydrodynamic models and calculations which approach the low density (dilute gas) limit. Among the effects that can complicate the interpretation of elliptic flow measurements are azimuthal correlations that are unrelated to the reaction plane (non-flow correlations). Using data for Au + Au collisions at {radical}s{sub NN} = 130 GeV from the STAR TPC, it is found that four-particle correlation analyses can reliably separate flow and non-flow correlation signals. The latter account for on average about 15 percent of the observed second-harmonic azimuthal correlation, with the largest relative contribution for the most peripheral and the most central collisions. The results are also corrected for the effect of flow variations within centrality bins. This effect is negligible for all but the most central bin , where the correction to the elliptic flow is about a factor of two. A simple new method for two-particle flow analysis based on scalar products is described. An analysis based on the distribution of the magnitude of the flow vector is also described.
313 citations
••
TL;DR: The recoverability analysis shows that this two-stage cluster-then-l1-optimization approach for sparse representation of a data matrix can deal with the situation in which the sources are overlapped to some degree in the analyzed BSS.
Abstract: In this letter, we analyze a two-stage cluster-then-l1-optimization approach for sparse representation of a data matrix, which is also a promising approach for blind source separation (BSS) in which fewer sensors than sources are present. First, sparse representation (factorization) of a data matrix is discussed. For a given overcomplete basis matrix, the corresponding sparse solution (coefficient matrix) with minimum l1 norm is unique with probability one, which can be obtained using a standard linear programming algorithm. The equivalence of the l1 -norm solution and the l0-norm solution is also analyzed according to a probabilistic framework. If the obtained l1 -norm solution is sufficiently sparse, then it is equal to the l0 -norm solution with a high probability. Furthermore, the l1 -norm solution is robust to noise, but the l0 -norm solution is not, showing that the l1 -norm is a good sparsity measure. These results can be used as a recoverability analysis of BSS, as discussed. The basis matrix in this article is estimated using a clustering algorithm followed by normalization, in which the matrix columns are the cluster centers of normalized data column vectors. Zibulevsky, Pearlmutter, Boll, and Kisilev (2000) used this kind of two-stage approach in underdetermined BSS. Our recoverability analysis shows that this approach can deal with the situation in which the sources are overlapped to some degree in the analyzed domain and with the case in which the source number is unknown. It is also robust to additive noise and estimation error in the mixing matrix. Finally, four simulation examples and an EEG data analysis example are presented to illustrate the algorithm's utility and demonstrate its performance.
312 citations
••
TL;DR: A perspective of the achievements in MOF research that have been made possible with SALE is provided and the studies that have facilitated the understanding and broadened the scope of use of this invaluable synthetic tool are examined.
Abstract: Metal-organic frameworks (MOFs) have gained considerable attention as hybrid materials-in part because of a multitude of potential useful applications, ranging from gas separation to catalysis and light harvesting. Unfortunately, de novo synthesis of MOFs with desirable function-property combinations is not always reliable and may suffer from vagaries such as formation of undesirable topologies, low solubility of precursors, and loss of functionality of the sensitive network components. The recently discovered synthetic approach coined solvent-assisted linker exchange (SALE) constitutes a simple to implement strategy for circumventing these setbacks; its use has already led to the generation of a variety of MOF materials previously unobtainable by direct synthesis methods. This Review provides a perspective of the achievements in MOF research that have been made possible with SALE and examines the studies that have facilitated the understanding and broadened the scope of use of this invaluable synthetic tool.
310 citations
••
TL;DR: An extensive survey of the results of possibly all available experimental and theoretical studies on gas entrainment by plunging liquid jets has been presented in this paper, where the following aspects of the phenomenon are thoroughly discussed: mechanisms, conditions, conditions of the onset of entrained gas, characteristics of the resulting bubble dispersion, and mass transfer.
310 citations
Authors
Showing all 14420 results
Name | H-index | Papers | Citations |
---|---|---|---|
Stefano Colafranceschi | 129 | 1103 | 79174 |
Dezso Horvath | 128 | 1283 | 88111 |
Valentina Dutta | 125 | 1179 | 76231 |
Viktor Matveev | 123 | 1212 | 73939 |
Anna Zanetti | 120 | 1488 | 71375 |
Harold A. Scheraga | 120 | 1152 | 66461 |
J. Pluta | 120 | 659 | 52025 |
Adam Ryszard Kisiel | 118 | 691 | 50546 |
Terence G. Langdon | 117 | 1158 | 61603 |
Andrei Starodumov | 114 | 697 | 57900 |
T. Pawlak | 111 | 379 | 42455 |
John D. Pickard | 107 | 628 | 42479 |
W. Peryt | 107 | 376 | 40524 |
William G. Stevenson | 101 | 585 | 57798 |
Anil Kumar | 99 | 2124 | 64825 |