A classifier is developed which uses information from all pixels in a neighbourhood to classify the pixel at the center of the neighbourhood. It is not a smoother in that it tries to recognize boundaries. and it makes explieite use of the relative positions of pixels in the neighbourhood. It is based on a geometric probability model for the distribution of the classes in the plane. The neighbourhood‐based classifier is shown to outperform linear discriminant analysis on some LANDSAT data.
The relationship between vegetable and tropical oils prices is investigated utilizing a vector autoregressive approach. Despite the apparent similarities between these oil prices in terms of their general pattern of movement over time, the relationships were not found to be strong enough to label them as 'cointegrated series'. Further analysis indicates that substitution relationships appear to drive price movements in the short run, while market-based structural factors for each of the oils are important elements in the price formation process in the long run.
A number of factors which determine the demand for enrichment services are identified and projections of enrichment capacity and requirements to the year 2000 are discussed. An outline of the nuclear fuel cycle is given. The prospects for the establishment of an Australian enrichment supply industry during the 1990s are considered. It is concluded that those prospects are limited by the depressed state of the world market and the lack of a domestic market.
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