Algorithm Research on Moving Vehicles Detection

AbstractMoving vehicles detection is an important part of Intelligence Transport System (ITS). Traditional method of moving vehicles detection from video is image subtraction which is apt to be affected by brightness changing, in this paper a kind of moving vehicles detection algorithm based on optical flow is purposed: estimate optical flow through two consecutive frames’ image pyramids and compute every optical flow image's threshold with which images are be segment into binaryzation images, after that, through morphological transformation operator and rectangular splitting algorithm on images, moving vehicles’ images will be extracted from background. Experiment shows that the algorithm framework is practicable

Virtual Leadership Matters: Capturing its Role in Facilitating Knowledge Sharing in Virtual Learning Environment

Many educational institutions and organizations have attempted to encourage knowledge sharing by implementing virtual learning communities. During the Coronavirus pandemic, how to utilize virtual communication technologies to effectively facilitate knowledge sharing among geographically dispersed learners (specifically in education institutions) has become an extremely urgent issue. Our study investigated 88 undergraduate students (nested in 10 groups) from a University in Southwest China. The research results reveal that self-presence and virtual member trust are the primary determinants in facilitating knowledge sharing (explicit vs tacit) in a virtual learning environment. Additionally, considering the challenges of forming effective collaborations in VLE (e.g., a great number of participants, environmental uncertainty, and one-way oriented communication), virtual leadership for improving the coordination of joint activities was developed. Virtual leadership improves the climate of a virtual learning environment by strengthening the relationships between self-presence/virtual member trust and knowledge sharing. Finally, the positive inter-relationship of explicit/tacit knowledge sharing and team performance is confirmed in our research