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This paper systematic analysis the factors which affect the feasibility of helicopter route from the point view of GIS. The affecting factors will be divided into geographical and non-geographical influencing factors. Based on calculate the geographical influencing factors precisely, establish the comprehensive multi-level evaluation model and give an example show how to calculate and judge the routes...
Several software usage models based on Markov chain have been presented in literature in the last three decades. However, existing software usage models have the common problem that the researchers directly give the value of transition probability, but not give a method for determining the transition probability. Use case and scenario-level usage model have been created based on extended UML model...
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