China has achieved indisputable economic growth in the past decades but, with it, unbalanced development across region and socio-economic groups. Little is known about how this impacts the lives of minority older adults who tend to live in remote inland areas. This study is the first attempt to...

Solid Al-air batteries using hydrogels have attracted increasing research attention owing to their high energy density, good handling, safety, and reliability. However, it is still difficult to develop solid Al-air batteries with preeminent discharge capacity, mechanical and eco-friendly...

Purpose The prerequisite for most traditional visual simultaneous localization and mapping (V-SLAM) algorithms is that most objects in the environment should be static or in low-speed locomotion. These algorithms rely on geometric information of the environment and restrict the application...