In this paper, a hybrid path replanning algorithm is proposed, which is based on roadmap-diagram. The path planning process is split into two phases: the learning phase and the query phase.

The sensors in water surface sensor networks are sparsely deployed, which means the distance between sensors is generally larger than the sensors' communication radius. So, it is difficult for sensors ...

He's right. A Venn diagram is meant to show the overlap between two groups of things -- ideally, to scale. One problem with the Clinton diagram, for example, is that "gun owners" in this context ...