Ice formation and
accretion on surfaces is a serious economic issue
in energy supply and transportation. Recent strategies for developing
icephobic surfaces are intimately associated with superwettability.
Commonly, the superwettability of icephobic materials depends on their
surface roughness and chemical composition. This article critically
categorizes the possible strategies to mitigate icing problems from
daily life. The wettability and classical nucleation theories are
used to characterize the icephobic surfaces. Thermodynamically, the
advantages/disadvantages of superhydrophobic surfaces are discussed
to explain icephobic behavior. The importance of elasticity, slippery
liquid-infused porous surfaces (SLIPSs), amphiphilicity, antifreezing
protein, organogels, and stimuli-responsive materials has been highlighted
to induce icephobic performance. In addition, the design principles
and mechanism to fabricate icephobic surfaces with superwettability
are explored and summarized.
Pati and Krishnaprasad (1990) first studied the connection between neural networks and wavelet transforms. Zhang and Benveniste (1992) gave a different treatment of this connection. However, the problem of constructing multidimensional wavelet frames for use in neural networks has not been satisfactorily studied. In this paper, one-dimensional wavelet frame is generalized to the multidimensional case by using single-scaling and multiscaling parameters. The construction of multidimensional wavelet frames is also discussed. These results provide more insight on the use of wavelets in neural networks.
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