Layered Structure of SWIM (IMAGE) Science China Press Caption This is the layered structure of SWIM. (Modified from Feng, Xiang and Zhong 2013). Credit ©Science China Press Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.