2,842 research outputs found
Stable p-wave resonant two-dimensional Fermi-Bose dimers
We consider two-dimensional weakly-bound heterospecies molecules formed in a
Fermi-Bose mixture with attractive Fermi-Bose and repulsive Bose-Bose
interactions. Bosonic exchanges lead to an intermolecular attraction, which can
be controlled and tuned to a p-wave resonance. Such attractive fermionic
molecules can be realized in quasi-two-dimensional ultracold isotopic or
heteronuclear mixtures. We show that they are stable with respect to the
recombination to deeply-bound molecular states and with respect to the
formation of higher-order clusters (trimers, tetramers, etc.
Use of investment project implementation mechanism under production sharing agreement for the development of oil and gas
Strengthening the investment attractiveness of economic systems of Russia’s mineral raw material specialization by means of oil and gas project implementation under a production sharing agreement. Purpose of the article is formation of conceptual approaches to the use of the mechanism for implementing investment projects under a product sharing agreement in the development of oil and gas bearing regions of Russia. The techniques and methods of system analysis are used for understanding the procedural and institutional, economic and financial nature of the proposed mechanism for implementing investment projects under a PSA model in the development of oil and gas bearing territories of Russia.peer-reviewe
Cross-Shape Graph Convolutional Networks
We present a method that processes 3D point clouds by performing graph
convolution operations across shapes. In this manner, point descriptors are
learned by allowing interaction and propagation of feature representations
within a shape collection. To enable this form of non-local, cross-shape graph
convolution, our method learns a pairwise point attention mechanism indicating
the degree of interaction between points on different shapes. Our method also
learns to create a graph over shapes of an input collection whose edges connect
shapes deemed as useful for performing cross-shape convolution. The edges are
also equipped with learned weights indicating the compatibility of each shape
pair for cross-shape convolution. Our experiments demonstrate that this
interaction and propagation of point representations across shapes make them
more discriminative. In particular, our results show significantly improved
performance for 3D point cloud semantic segmentation compared to conventional
approaches, especially in cases with the limited number of training examples
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