Results 231 to 240 of about 210,996 (288)

Life's Complexity Pyramid

Science, 2002
How are the myriad components inside the cell connected together, enabling the cell to carry out its specific functions? In their Perspective, [Oltvai and BarabAisi][1] discuss two new studies ([Lee][2] et al ., [Milo][3] et al .) that investigate both biological networks of intracellular components and nonbiological networks such as the World Wide Web.
Zoltán N. Oltvai, Albert-László Barabási   +1 more
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Trigonal pyramidal five-co-ordinated Ni0 complex

Journal of the Chemical Society, Chemical Communications, 1973
An X-ray investigation of the complex NiN-(C2H4PPh2)3 shows that it is the first known complex to have trigonal pyramidal co-ordination.
Carlo Mealli, Luigi Sacconi
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Panoramic image mosaics via complex wavelet pyramid

SMC'98 Conference Proceedings. 1998 IEEE International Conference on Systems, Man, and Cybernetics (Cat. No.98CH36218), 2002
Image mosaics is one of the scene encoding approaches and is a very active research area in computer vision community and computer graphics community. This paper presents a robust panoramic image mosaicing scheme which employs complex wavelet pyramid and the human visual perceptive thresholding techniques.
P. Bao, D. Xu
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Seismic migration using the complex shiftable pyramid

69th EAGE Conference and Exhibition - Workshop Package, 2007
Seismic migration using the complex shiftable Pyramid Truong Nguyen (Ecole des Mines de Paris) and Herve Chauris (Ecole des Mines de Paris) SUMMARY____________________________________________________________ We consider how the 2-D seismic Kirchhoff migration scheme can benefit from a recently introduced shiftable directional pyramid.
T. Nguyen, H. Chauris
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Complex Dual-Tree Pyramid Scattering Transformer

IEEE Transactions on Neural Networks and Learning Systems
Attention-based transformer networks have recently played an increasingly important role in computer vision tasks. However, since pixel-by-pixel attention multiplication does not involve constraint assumptions such as spatial invariance, the computational complexity grows quadratically with the increase of input pixels. Therefore, this article proposes
Xiaotong Li, Licheng Jiao, Lingling Li, Fang Liu, Hao Zhu, Xin Zhang, Xu Liu, Shuyuan Yang   +7 more
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A low complexity overcomplete directional image pyramid

Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429), 2004
An undecimated directional filter bank (UDFB) derived from the DFB originally proposed by Bamberger and Smith is proposed. The new UDFB has excellent orientation selectivity, and maintains the low computational complexity from its predecessor. While over complete, the UDFB presents other properties like shift invariance, desirable for some image ...
J.G. Rosiles, M.J.T. Smith
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Network Complexity Pyramid with five levels

International Journal of Systems, Control and Communications, 2009
A network complexity pyramid with five levels is suggest and summarised. From the top level-5 to the bottom level-1 complexity and diversity are increasing but universality and simplicity are decreasing. They can be described in an unification form by four hybrid ratios.
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