Application of Fuzzy Logic for Autonomous Bay Parking of Automobiles

In this paper, we investigate the control problem of autonomous bay parking system. We choose a referenced parking lot and define a suitable parking spot based on some measurements at various places. A kinetic model is set up for the convenience of analysis and simulation. The pose of the car during the parking procedure can be determined by the initial pose, the backward speed, and the steering angle of the wheel. Then, both a fuzzy speed controller and a fuzzy steering controller are designed for the bay parking. Finally, simulation results show the effectiveness of our designed controllers.

Relationship of demoralization with anxiety, depression, and demographics of Chinese dialysis patients

Objective:The purpose of this study is to investigate the demoralization level of dialysis patients in China and analyze the influencing factors.Materials and Methods:A convenience sample of 278 dialysis patients from a tertiary hospital participated in a cross-sectional descriptive study using a structured questionnaire including assessments of demographic data,Demoralization Scale-II(DS-II),and Hospital Anxiety and Depression Scale.The main analysis consisted of descriptive statistics,correlation coefficients,and multiple linear regression.Results:The mean standard deviation DS-II score was 11.87(7.72).Dialysis patients had a high level of demoralization.Findings from multiple linear regression indicated that demoralization was positively correlated with marital status(β=0.141;P=0.001),employment status(β=0.113;P=0.006),anxiety(β=0.393;P<0.001),and depression(β=0.224;P<0.001).These variables explained 57.1%of the variance in patient demoralization.Conclusions:Demoralization is common in dialysis patients and is associated with marital status,employment status,anxiety,and depression.Health-care providers might regularly assess demoralization in dialysis patients,and develop related interventions to improve the quality of life.