The article introduces a method when assessing the degree of similarity between two objects that are represented by a set of two-dimensional landmarks. One possible weighting scheme is suggested, and the effect of weighting is demonstrated through
a face-matching application. Appropriate weighting increases the ability to correctly match two faces and weighting has the largest effect when used with a projective transformation.
Effects of variable attribute weights on landform classification
This paper focuses on the attribute weight issue and advocates use of modifiable attribute weights in terrain-based environmental analysis and classification. As an example, the effects of modifying attribute weights were evaluated for fuzzy k-means
that fuzzy k-mean landform classification is sensitive to weight adjustments of adopted terrain attributes.
Weighted spatial adaptative filtering: Monte Carlo studies and application to illicit drug market modeling
Results from Monte Carlo studies suggest that the weighted spatial adaptive filter is at least as accurate as the unweighted filter for cases having smoothly changing parameters, but superior for cases having discontinuous, step-jump parameters
. A case study on illicit drug-market activities using census tract-level data from Pittsburgh, Pennsylvania, further illustrates the advantages of the weighted filter.
Gypsum has been cast into spheres and placed in soils| weight loss has been used to identify relative water flow routes. Theoretical considerations and laboratory experimentation show that solutional weight loss of the material used increased
with increasing water flow, but is independent of pH above pH 4. Results for gypsum sphere weight loss are presented for soils where moisture conditions have been measured independently using tensiometers. The data suggest that the weight loss method provides
Dry weight costs and establishment of seeds and vegetative propagules
A garden experiment was conducted to investigate the relationship between the dry weight costs to a plant of producing seeds or vegetative propagules and their frequencies of establishment on a variety of substrates in five weedy Compositae
. Vegetative propagule weight was positively related and depth of burial negatively related to establishment success. The results are discussed in terms of costs per propagule, dispersal efficiency, and establishment success on different substrates.
Geographically weighted colocation quotients : specification and application
Connecticut ; Correlation ; Proximity ; Spatial analysis ; Spatial distribution ; Spatial weighting ; Statistical analysis ; Statistics ; United States of America
The AA. analyse geographically weighted colocation quotients through specification and application. Firstly, they generaliseLeslie and Kronenfeld's global measure as well as specify a local counterpart for each global statistic using two different
types of spatial filters : fixed and adaptive. These geographically weighted colocation quotients are applied to the spatial distribution of housing types to demonstrate their utility and interpretation.
Use of the discharge-weighted average velocity in studies of the frictional energy loss of streamflow
Existing resistance equations are designed, and have been historically used, to estimate discharge from manufactured conduits and streambeds which resemble them. They produce a value for the area-weighted average velocity, which can
then be multiplied by the cross-sectional area to produce an estimate of discharge. In more recent times, researchers have also begun to study energy loss, a use for which the area-weighted average is inappropriate. The discharge-weighted average velocity
Rates of chemical weathering of porous rhyolites : ten-year measurements using a weight-loss method
that the younger rock has a lower weight loss, and the older rock a higher weight loss, and the rates of weight loss for both rocks on the ground surface is larger than that under the saturated grus layer. The first result shows that older rock has a higher rate
Weight variations within a set of demand points, and location-allocation issues: a case study of public libraries
The purpose of the paper is to explore the consequences of weight variations in a given set of demand joints on the average and maximum distance between demand and supply, the geographical pattern of supply points, and the amount allocated to every
Errors in measuring the percentage dry weight change of stone tablets
Portland Stone and Monks Park limestone tablets were used to assess weathering loss over a two-year study. Proedures involved in preparing tablets for exposure, attaching them to the exposure frame and reweighing might have influenced weight changes
measured. Although all the procedures seem to produce a statistically insignificant amount of weight loss, the two stone types do respond differently to the procedures. This suggests that stone properties may be important in determining the accuracy
A nitric acid digestion and ignition technique developed to measure relative frequencies of charcoal in lake and bog sediments measures the weight of charcoal relative to the dry weight of the sample (percentage charcoal) and gives results