Point of Interests (POI) identification using social media data (e.g. Flickr, Microblog) is one of the most popular research topics in recent years. However, there exist large amounts of noises (POI irrelevant data) in such crowd-contributed collections. Traditional solutions to this problem is to set a global density threshold and remove the data point as noise if its density is lower than the...

Perlin's original noise function was defined in terms of generating random vectors at lattice points and then interpolating between them, but a simple approximation can be created by instead generating White noise values at the lattice points and then interpolating. The fewer interpolated points there are, the higher the frequencies in the noise will be. You can then generate fractal noise by t...

Multilayer optical reflectors constructed from 'stacks' of alternating layers of high and low refractive index dielectric materials are present in many animals. For example, stacks of guanine crystals with cytoplasm gaps occur within the skin and scales of fish, and stacks of protein platelets with cytoplasm gaps occur within the iridophores of cephalopods. Common to all these animal multilayer...

Let $X$ be a Banach space of $dim X > 2$ and $B(X)$ be the space of bounded linear operators on X. If $L : B(X)to B(X)$ be a Lie higher derivation on $B(X)$, then there exists an additive higher derivation $D$ and a linear map $tau : B(X)to FI$ vanishing at commutators $[A, B]$ for all $A, Bin B(X)$ such that $L = D + tau$.

Microwave polarimetric models for rough dielectric dihedral corner reflectors provide helpful tools to understand the complex interaction of radar with urban land cover. After a theoretical background, we present results from a numerical analysis which takes into account the dielectric properties and roughness of the reflecting surfaces and evaluates the contributions of both coherent and diffu...

An adaptive enhancement method is proposed to improve recognition accuracy on the outputs of blind speech separation (BSS) system based on adaptive decorrelation filtering (ADF) in diffuse noise. A divide and conquer strategy is taken to deal with the noise effects on both system adaptation and ADF outputs. First, fast noise compensation (NC) is performed for filter adaptation, forcing ADF to f...