IntroductionTo explore a quick and non-invasive way to measure individual psychological states, this study developed interview-based scales, and multi-modal information was collected from 172 participants.MethodsWe developed the Interview Psychological Symptom Inventory (IPSI) which eventually retained 53 items with nine main factors. All of them performed well in terms of reliability and validity. We used optimized convolutional neural networks and original detection algorithms for the recognition of individual facial expressions and physical activity based on Russell's circumplex model and the five factor model.ResultsWe found that there was a significant correlation between the developed scale and the participants' scores on each factor in the Symptom Checklist-90 (SCL-90) and Big Five Inventory (BFI-2) [r = (−0.257, 0.632), p < 0.01]. Among the multi-modal data, the arousal of facial expressions was significantly correlated with the interval of validity (p < 0.01), valence was significantly correlated with IPSI and SCL-90, and physical activity was significantly correlated with gender, age, and factors of the scales.DiscussionOur research demonstrates that mental health can be monitored and assessed remotely by collecting and analyzing multimodal data from individuals captured by digital tools.
This paper numerically investigates the flow-induced vibration of a circular cylinder attached with front and/or rear splitter plates at Re = 120. The effects of plate length and plate location on the hydrodynamic coefficient, vibration response, and flow wake are examined. The results reveal that the hydrodynamic coefficient of the cylinder with a single rear plate is significantly reduced at Ur = 8 (Ur is the reduced velocity), resulting in the VIV suppression. However, the galloping is excited at Ur > 8 due to the hydrodynamic instability, accompanying with the rapid jump of response amplitude and hydrodynamic force as well as the abrupt drop of response frequency. The alternate reattachment of shear layers on the plate surface introduces an extra lift force that strengthens the vibration response. By introducing an individual front plate, the separation point of cylinder-plate body moves downstream, leading to the delayed vortex shedding and narrowed wake flow and hence the VIV suppression. The vibration exhibits variable patterns when the cylinder is equipped with bilateral plates, including the typical VIV mode, weak VIV-galloping coupling response mode, and IB-galloping-DB mode (IB and DB represent the initial branch and desynchronization branch, respectively). The galloping branch in IB-galloping-DB mode is observed with an abrupt drop of response frequency as well as a tiny time lag between displacement and lift force. The vibration response is significantly suppressed by the cylinder with 1D front plate and 1–2D rear plate due to the more streamlined profile.
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