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Sulfate scale deposition (BaSO4, CaSO4, and SrSO4) is a common problem in oilfield operations around the world, which causes significant formation damage during production and injection activities. This paper presents the results of an experimental study on the permeability reduction of porous media due to sulfate scale deposition. A set of experiments were cond...

An efficient and accurate forest sample plot survey is of great significance to understand the current status resources at stand or regional scale basis scientific management. Close-range photogrammetry (CRP) technology can easily quickly collect sequence images with high overlapping reconstruct 3D model scenes extract individual tree parameters automatically and, therefore, greatly improve eff...

Variational principles appear in a vast number of scientific disciplines. They often provide a ‘view from above’ which permits to better comprehend and analyse problems. In this paper we show how variational techniques can be used to modelise perceptual color correction of digital images. We will show that the basic human visual phenomenology defines a unique class of functionals whose minimiza...

The detection of salient regions is an important pre-processing step for many 3D shape analysis and understanding tasks. This paper proposes a novel method for saliency detection in 3D free form shapes. Firstly, we smooth the surface normals by a bilateral filter. Such a method is capable of smoothing the surfaces and retaining the local details. Secondly, a novel method is proposed for the est...