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Background With the gradual deepening of the comprehensive reform of community health services, the prevention and control of single diseases for the entire population in the community is also constantly being optimized, However, there is still a lack of appropriate evaluation methods in the community to reflect its prevention and control effectiveness evaluation. Objective By analyzing and exploring the cost effect of the existing whole-population prevention and control measures of osteoporosis in Fenglin community, from 2016 to 2022, this paper answers the initial results and possible problems of the whole-population prevention and control of single disease in the community. Methods This study conducted a cost-effectiveness analysis on 4 293 community residents who received osteoporosis prevention and treatment in Fenglin community from 2016 to 2022. Divide the research object into three states based on bone density values: healthy, low bone mass, and osteoporosis, and construct a Markov model to analyze the influencing factors of different state transitions. And based on the predicted values of the Markov model combined with quality adjusted life years (QALY) , the increment of quality adjusted life years (QALY) is calculated. All costs invested in prevention and control work from 2016 to 2022 are counted, and the effectiveness of prevention and control is evaluated by the cost/quality adjusted life year increment ratio. Quality adjusted life years (QALY) are obtained by calculating the health utility value and expected life determined through literature search. Results The total cost of osteoporosis prevention and treatment in Fenglin community was 33 814 102.15 yuan. The total quality-adjusted life years of 4 293 community osteoporosis prevention and treatment population were 77 098.288 9 at the first diagnosis, the average per capita was 17.959, and the standard deviation was 9.34. At the second diagnosis, the total quality-adjusted life years were 79 616.936 1, the mean per capita was 18.546, the standard deviation was 9.342, and the difference between the two diagnoses was 2 518.647 2. The incremental cost-effectiveness ratio (ICER) is 2 132.907 0 yuan /QALY, and the incremental cost-effectiveness ratio (ICER) is less than 1 times (66 965.10 yuan) per capita GDP, indicating that the intervention scheme is fully cost-effective. Conclusion This study combined Markov model and quality-adjusted life years (QALY) to make a preliminary evaluation of the prevention and treatment effect of osteoporosis in Fenglin community. The results showed that the intervention program of osteoporosis prevention and treatment in Fenglin community was worth investing, and provided a certain basis for the accurate prevention and treatment decision of osteoporosis in the future.

Due to the severity of resource consumption and uncertainty in orders, new challenges have arisen for production scheduling in enterprises. This paper studies the scheduling problem of minimising the total weighted tardiness for jobs with fuzzy processing times and due dates on identical parallel machines with resource constraint. To address this research problem, we first propose methods to calculate the upper bound of resource consumption and the maximum number of machines that can be used, effectively reducing the search space and improving the algorithm's efficiency. Secondly, a local search algorithm based on job swapping is proposed to enhance the algorithm's performance. Then, repair algorithms based on job removal and job swapping are designed to repair infeasible solutions. Finally, we propose a fuzzy genetic algorithm (FGALS) to solve the problem based on the above elements. Through extensive simulation experiments, the effectiveness and efficiency of the FGALS algorithm are verified by comparing it with commercial solver Gurobi and several meta-heuristic algorithms. [ABSTRACT FROM AUTHOR]

Exploring the relationship between teacher support and students' learning engagement in high school information technology courses can help improve students' learning ability. The researchers took 246 high school students from a city in China as the research subjects and used structural equation modeling to explore the relationship between teacher support and learning engagement in high school information technology courses from the perspective of computer self-efficacy. The results show that teacher support, computer self-efficacy, and learning engagement are positively correlated. Teacher support has a positive effect on information technology learning engagement, and computer self-efficacy plays a partial mediating role in the relationship between teacher support and information technology learning engagement.

In order to study the optimization strategy of chemical instrumentation analysis methods, it can make the chemical instrumentation analysis methods more optimized. This paper proposes an improved sparrow search algorithm MSSA based on the ADDIE model, and a decision tree analysis method under random forest is introduced to assist chemical instrumentation analysis. The optimal prediction value of the algorithm is judged analytically, and adaptive operations change the size of the neighbourhood space to obtain the optimal strategy of the algorithm by a merit-seeking mechanism. The decision tree and evaluation indicators are then constructed with the decision tree under a random forest algorithm, and the indicators are used to select the optimisation path. From the experiments, it can be seen that the improved sparrow search algorithm MSSA strategy based on the ADDIE model can improve the optimisation ability of the algorithm. Furthermore, the MSSA algorithm also shows excellent performance in the experiments and obtains the best coverage effect. The coverage rate of the optimised chemical instrumentation analysis method reached 94.55%, which was 9.87%, 4.15%, 6.68%, 3.22% and 7.28% higher than other types of algorithms, respectively. It illustrates that the improved MSSA algorithm under the ADDIE model can also obtain better optimisation capability for practical chemical instrumental analysis method optimisation problems. The evaluation index complements this under the decision tree, which shows that the model is more conducive to the analytical capability of chemical instruments. It also provides a direction for solving the problem of choosing the optimal analytical method in chemical instrumentation analysis.

In order to explore the applicability of random forest algorithm in the detection of alcoholic foreign matter and to improve the identification of alcoholic products. In this paper, based on the random forest algorithm, the feature values of random forest are fuzzified using the fuzzy comprehensive evaluation method, and the application model of alcohol foreign body detection anomaly based on random forest fuzzy tree nodes is established. And the reliability of the random forest algorithm is verified by the quantitative analysis of the three test indexes (i.e., recall, precision, and accuracy) and the anomaly proportion coefficient of the test data set by the algorithm in this paper. The results show that the recall, precision, and accuracy of the random forest-based anomaly detection for alcoholic beverage foreign objects are 99.65%, 95.49%, and 97.19%, respectively, and the average value of the three eigenvalues of this paper’s algorithm is 97.44%, which is 59.89%, 43.98%, and 1.92% higher than the other three algorithms, respectively. In terms of the anomaly proportion coefficient, the stability of the algorithm in this paper is the best when the coefficient takes values between [0.2, 0.6]. It can be shown that the algorithm based on random forest can be applied to the foreign matter detection of wine, and through the detection of anomalies, the quality of the wine currently undergoing detection can be clearly and explicitly analyzed, which also provides a new direction for the application of the random forest algorithm.