CCF Transactions on Pervasive Computing and Interaction (CCF TPCI) is dedicated to publishing rigorously peer-reviewed, high-quality scientific articles covering all aspects of human-computer interaction and pervasive/ubiquitous computing. Computing technology is becoming increasingly pervasive, and enables more advanced interactions among humans, machines, and the environment. To foster the developments in the area, CCF TPCI provides a publication and communication platform and welcomes contributions from researchers, professionals, and industrial practitioners. This journal is published on behalf of the China Computer Federation (CCF), and it is powered by the CCF technical committees on Pervasive Computing and Human Computer Interaction. Specific areas of interest include, but are not limited to: Pervasive Computing · Crowd sensing and computation · Opportunistic networking and sensing · Psychological sensing · Mobile sensing · Mobile social networking · Mobile and wearable computing systems and services · Wireless sensors networks and RFID technologies · Positioning and tracking technologies · Context modeling and context-aware computing · Activity recognition · Internet of Things · Pervasive computing applications, such as smart home, healthcare, smart city Human-Computer Interaction · Intelligent user interface · Interaction techniques, devices, and modalities · Interface design processes and tools · Brain-machine interaction · Interaction theories and models · Innovative interaction approaches · User experience and usability · Games and play · Virtual reality · Human robot interaction · Understanding people: theory, concepts, methods · Specific application areas Human-Machine Systems · Human-machine systems · Cyber-physical-social systems · Human-machine collaboration · Trust, security, and privacy · Data mining for human-machine intelligence.