A detailed discussion of the point in polygon problem for arbitrary polygons is given. Two concepts for solving this problem are known in literature: the even–odd rule and the winding number, the former leading to ray-crossing, the latter to angle summation algorithms. First we show by mathematical means that both concepts are very closely related, thereby developing a first version of an algor...

The application of semantic web technologies such as inference to the field internet things (IoT) can realize data information enhancement and knowledge discovery, which plays a key role in enhancing value intelligence. However, mainstream engines cannot be applied IoT computing devices with limited storage resources weak power reason about uncertain knowledge. To solve this problem, authors pr...