Sliding window technique

To further increase detector performance, several techniques to optimize the exhaustive sliding window search with improved search patterns have been proposed. These utilize pre-knowledge of the scene [23] or local classifier responses [24]. 

The rise of easy-to-use numerical models has led to a similar rise in complaints that some users treat them as black boxes" or as if the model were one of those magic balls where the answer to any question mysteriously appears in a tiny window. In truth, the phenomenon of mindlessly accepting answers from any fool, be it a slide rule or a physical model, has always been with us however, numerical models have evolved to the point that we can generate many more incorrect answers than ever before. A solution to the black box problem exists in the form of an old solution technique—the tiered analysis, sometimes called the phased approach. 

Demountable cells are similar in construction to ordinary sealed cells, but have no filling ports or drilled windows. The cell is frequently assembled without a spacer the sample path length is then listed as a capillary film. When using such a cell with a spacer, the operator must be careful not to get gas bubbles in the sample. The best techniques to use in assembling these cells are to slide, rather than drop, the top window into place, or to contact one edge and then lower the other edge until the top window is in place. 

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