Guest Editors' Introduction: Intelligent Resource-Constrained Sensor Nodes.

Following continued system miniaturization for over past five decades, the size of unit computing has been steadily shrinking. In the foreseeable future, computing will be all around us, in mostly invisible forms, and is expected to lead more than 50 billion Internet-of-Things (IoT) devices, at the forefront of which will be distributed sensing nodes acting as the eyes and ears of IoT.