In character recognition, zoning based feature extraction is one of the most popular methods. The character image is divided into predefined number of zones and a feature is computed from each of these zones. Usually, this feature is based on the pattern (black) pixels contained in that zone. Some of such features are average pixel density, sum squared distance, histogram. But in such features,...

Rockfall is an extremely rapid process involving long travel distances. Due to these features, when an event occurs, the ability to take evasive action is practically zero and, thus, the risk of injury or loss of life is high. Damage to buildings and infrastructure is quite likely. In many cases, therefore, suitable protection measures are necessary. This contribution provides an overview of pr...

Strengthening ecosystem monitoring and improving the efficiency of ecological risk assessment are great significance for sustainable development ecosystems in an arid area. Using remote sensing data land use, status typical areas is assessed, its spatial heterogeneity analyzed from perspective space-time, key management finally identified. The results show that (1) transformation mode landscape...

Today, there are varieties of methods for determining the risk flooding in different areas a catchment. However, use GIS-based weighting is receiving increasing attention among researchers. In early 2019, severe and continuous floods occurred some provinces Iran. Khorramabad was one cities most affected by floods. Regrettably, during construction development city, minimum distance from roads vi...