This study aimed to investigate the status of sense of coherence (SOC), acceptance of disability (AD) and psychological distress (PD) of patients with permanent colostomy and evaluate the role of AD in mediating the relationship between SOC and PD. Cross-sectional data were collected from 162 patients with permanent colostomy at stoma care outpatient clinic. Structural Equation Model of the SOC, AD, and PD was established to examine the mediating effect. Results indicated that the SOC and AD of patients with permanent colostomy were both at a low level, and PD was common in patients. In addition, a partial mediating effect of AD between SOC and PD was verified. Enhancing the SOC and AD of patients with permanent colostomy could be essential for alleviating their PD.
The structural failure of a tunnel is a process that evolves from local damage to overall destruction. The system reliability analysis method can be useful for analyzing the evolutionary law of local structural failure. In many complex stress environments, the structural performance function may be very complicated or even impossible to solve. This paper establishes a response surface function to represent the implicit tunnel performance function. The reliability of the shear capacity of a tunnel is considered. The critical parts and critical failure paths of the tunnel system are determined using the β-unzipping method. Failure evolution is analyzed to obtain the failure process of the tunnel system. Different failure modes are shown under different cases. Based on the partial failure probability and impact on the tunnel system, the risk levels of the critical parts at each stage of the failure history are evaluated. Therefore, the tunnel failure tree model obtained by combining the response surface method and β-unzipping method plays an important role in tunnel reliability evolution, and can evaluate tunnel safety comprehensively.
The growth of horticultural crops is directly affected by the airflow environment in plant factories. In this experiment, a three-dimensional model was established for an indoor artificial light plant factory using computational fluid dynamics (CFD) to simulate the airflow field distribution in the plant factory, the measured value and the simulated value of air velocity were in good agreement, only 10% of the cultivation area was in the range of suitable growth air velocity. The optimization design of airflow field in the plant factory will be developed.
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