We present a technique for mobile robot exploration in unknown indoor environments using only a single forward-facing camera. Rather than processing all the data, the method intermittently examines only small 32×24 downsampled grayscale images. We show that for the task of indoor exploration the visual information is highly redundant, allowing successful navigation even using only a small fract...

Facet browsing has become popular as a user friendly interface to data repositories. The Semantic Web raises new challenges due to the heterogeneous character of the data. First, users should be able to select and navigate through facets of resources of any type and to make selections based on properties of other, semantically related, types. Second, where traditional facet browsers require man...

The high-intensity development of a city encroaches on the ecological land, such as lakes, rivers, and forests, which changes stable land relationship, resulting in security problems, regional waterlogging decline biodiversity. Identifying urban systems constructing patterns (ESP) are great importance for protection spatial planning. complexity environment landscape cities makes them more diffi...

introduction land use change and its effects on soils is one of the important factors that decrease soil quality. nowadays because of rapid growth of population, vast forest areas are changed into agricultural lands but chemical properties of the soils are commonly affected by changes in land usage.  converting the forest areas into agricultural lands is one of the prevalent issues in iran, esp...

In order to study the degree of economic linkages among western regions and promote coordinated development regions. Based on 13 in 2000, 2010 2019, article uses a modified gravity model measure strength each region, then analyzes network structure along Western Land Sea New Corridor from three aspects: density, core-edge relationship multidimensional centrality through social analysis methods....