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Semantics plays an important role on spatial scenes building and similarity contrast. Based on the description logic knowledge base (ontology) and multi-layer neural network, this paper simulates the procedure of human perception, measures the semantic similarity between spatial entities. In the Knowledge Base, spatial concepts are built by some description of space, time, and properties, most of...
Earthquakes are one of the most threatening natural disasters, due to their suddenness and unpredictability. Population loss assessment is the sole basis for earthquake rescue. Compared with the existing methods based on the buildings, vulnerabilities often require accurate building data to evaluate building damage. This paper proposes a method for fast loss assessment of population without a detailed...
In order to study the soil-foundation-structure interaction of concrete filled steel tube(CFST) arch bridges, the theory of substructure is introduced and the substructure-finite element method is adopted. Taking the Nanning Yonghe Bridge for example, three models are developed, which the soil-foundation interaction is introduced in model 1, the interaction is analyzed using Finite Element Method...
In this paper we groped for the feasibility about ICI decreasing in precoding OFDM system. First, a model of precoding OFDM system was introduced, then, we present the algorithm of the precoding matrix, Through simulation and analysis, we get the ICI of OFDM system with precoding is reduced, otherwise, the complexity of the receiver does not increase, so the method adapts to the downlink especially.
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