Figure 4
From: Dissolved oxygen content prediction in crab culture using a hybrid intelligent method

Experimental data collection system and location: (a)The structure diagram of the digital wireless monitoring system; (b) The sensor layout in the river crab pond. The photographs of the man, computer systems and web browser in Fig. 4 were taken by first author Huihui Yu in Gaocheng town, Yixing city, Jiangsu province. The drawing of the man in the top right of the figure, and the drawing of the equipment next to the “Water quality monitor application system” were created by Yingyi Chen. And, the whole figure was designed and drawn by author Huihui Yu and Yingyi Chen.