To address issues such as uneven airflow distribution, reduced dust collection efficiency, and different filter bag lifespans in multi-chamber bag filters, computational fluid dynamics (CFD) simulations were employed to analyze the internal flow field and propose optimization strategies. The results revealed that, although there were differences in velocity and pressure fields across the chambers, the overall distribution patterns showed certain similarities. In the original filter model, disordered airflow from the high-velocity inlet led to significant discrepancies in airflow distribution, especially along the chamber sidewalls, top corners, and central regions, resulting in considerable variation in the airflow handled by individual filter bags. Furthermore, high velocities at the bottom of the filter bags caused severe wear, complicating bag detection and replacement. Therefore, an optimization approach involving three vertical descending deflectors in the hopper was proposed. Five optimization schemes were developed to improve airflow organization before it reached the filtration area. To validate the feasibility of the proposed design and the accuracy of the numerical model, experiments were conducted using a 1:10 scaled-down model. According to the simulation results, the optimal scheme reduced the inlet and outlet pressure drop by 11.2%, while improving airflow uniformity by 40–50%, leading to a more balanced airflow distribution and increased operational efficiency.

The purpose of this study is to verify the applicability of the Chinese clinical practice guideline evaluation tool (AGREE-China) by evaluating the diabetes mellitus (DM) guidelines, and to compare its characteristics with the clinical guideline research and evaluation tool II (AGREE II), in order to provide reference for clinical practice and subsequent revision of guidelines.

Dissipative structure theory, as a new scientific theory, emphasizes that a stable and orderly structure can be formed in the region far from the equilibrium state by exchanging matter and energy with the outside world. The mental health system is an open system, which meets the basic conditions of the application of the dissipative structure. Therefore, applying the dissipative structure theory to the system construction of the mental health education can provide a new theoretical perspective and research method for the construction of the mental health education system. To study the construction of mental health education system from the theory of dissipative structure has an important guiding significance for the mental health education of college students.

Since the 1980s, China's mental health education booming, has achieved fruitful results, but the development of mental health education is not balanced, the timeliness of mental health education poor system is not sound, lack of integration and comprehensive, ignored the ecosystem of college students in the interaction of many factors. Based on the development ecology theory, it is particularly important to establish an objective, comprehensive and systematic mental health education system.