Abstract In scientometrics, scientific collaboration is often analyzed by means of co-authorships. An aspect which overlooked and more difficult to quantify the flow expertise between authors from different research topics, an important part progress. With Topic Flow Network (TFN) we propose a graph structure for analysis topic flows their respective fields. Based on multi-graph model, our prop...

With the development of sensor, computer and communication, researcher attaches more attentions to research wireless sensor networks because its bright future in applications. This paper introduces structure, characteristics networks. Then, some key questions field are discussed based on basic principles. The end discusses application fields comes a conclusion.