Adaptive thresholding with inverted triangular area for real-time detection of the heart rate from photoplethysmogram traces on a smartphone. - Wen Jun Jiang; Peter Wittek; Li Zhao; Shi Chao Gao (EMBC, 2014)

Real-time quantifying heart beat rate from facial video recording on a smart phone using Kalman filters. - Wen Jun Jiang; Shi Chao Gao; Peter Wittek; Li Zhao (Healthcom, 2014)

Data-driven estimation of blood pressure using photoplethysmographic signals. - Shi Chao Gao; Peter Wittek; Li Zhao; Wen Jun Jiang (EMBC, 2016)