It is essential to have an adequate understanding of the fluid-structure in a porous medium since this gives direct information about the processes necessary to extract the liquid and the likely yield. The concept of symmetry is one of the petroleum engineering issues that has been used to provide an analytical analysis for modeling fluid dynamics through porous media, which can be beneficial to validate the experimental field data. Tight reservoirs regarding their unique reservoir characterization have always been considered as a challenging issue in the petroleum industries. In this paper, different injectivity scenarios which included chemical and thermal methods were taken into consideration to compare the efficiency of each method on the oil recovery enhancement. According to the results of this experiment, the recovery factor for foams and brine injection is about 80%, while it is relatively 66% and 58% for brine-carbon dioxide and brine-nitrogen, respectively. Consequently, foam injection after water flooding would be an effective method to produce more oil volumes in tight reservoirs. Moreover, KCl regarding its more considerable wettability changes has provided more oil production rather than other scenarios.

With the progress of society and the rapid development of science and technology in the world, the 21st century will be the multimedia era. Therefore, physical education teaching in colleges and universities should take the initiative to seize the opportunity, adapt to social needs, change traditional teaching concepts, introduce modern teaching methods into physical education teaching, enrich physical education teaching content, stimulate students’ interest in sports knowledge and sports technology learning, broaden knowledge horizons, improve teaching quality, and promote the development of physical education. The traditional teaching mode restricts the development of physical education (PE) in many aspects, and one of the important contents of modern teaching methods is to master and use modern teaching equipment and means. Therefore, it is necessary to timely change the educational thought, update the educational concept, and actively explore and research new teaching methods that are suitable for the educational concept of the times, to ensure the adaptability, scientificity, and creativity of teaching methods. Based on the above background, the research content of this paper is the application of multimedia CAI technology in PE teaching. Using the methods of document interviews, analysis and induction, and online retrieval, on the basis of reading a large number of professional theoretical books on physical education, multimedia technology, and modern teaching and reform, the application of multimedia technology in physical education teaching in colleges and universities is analyzed. The application is researched at the theoretical level. This paper takes PE college 2019 students as the simulation object. The results show that the pass rate of professional English after the experiment is 15.33% higher than that before the experiment.

With increasing life pressure and shrinking leisure area due to the integral improvement of urbanization level in recent years, people gradually start to explore the possibility of leisure sports in rural area. This thesis has identified the concept of coupled ecological and industrial chain, and performed mechanism analysis of dynamic effect, and then further unfolded the development of rural leisure sports under ecological industry coupled mode. The result of research has confirmed that ecological industry coupling can optimize the integral effect of rural leisure sports. Through discussion and analysis, this thesis hopes to provide certain reference to the promotion of peasant sport program and the development of leisure sports in rural area.

In order to obtain more children’s physical training information and improve the accuracy of children’s physical training monitoring, a multisensor-based children’s physical training information collection, analysis, and monitoring system is proposed. In the process of physical training and sports training, people’s physical training information collection is directly related to the level and effectiveness of physical training. With the combination of multisensor concept and sports training information collection, it can collect the key index data of sports mobilization in real time with the help of multiple sensors and information technology. Taking children’s physical training as the object, this paper designs a multisensor physical training data information acquisition terminal, collects different training characteristic data with the help of multisensor equipment, and then comprehensively analyzes and monitors the physical information with the help of certain fusion technology, so as to construct a human posture recognition algorithm based on children’s physical training information acquisition. Support vector machine and decision tree are used to classify children’s different physical exercise states, and a relatively perfect algorithm architecture of human posture recognition is constructed. The results show that for two decision trees, each decision tree is trained with a total of 675 groups of data, and a total of 342 groups of data are verified and pruned. The two decision trees take 7.17 s and 7.32 s to complete the training process, respectively. It can be seen that when the number of training groups is equal, the training time of the two placement methods is close, so it can be considered that the two placement methods have little effect on the training speed of decision tree. The experimental data show that the design of children’s physical training monitoring system in this paper has a certain market value.

In order to solve the problem of the application of mobile information system in the transformation of ethnic physical education in colleges and universities in the 5G era, an analysis method based on the application of mobile information system in the transformation of ethnic physical education in colleges and universities in the 5G era is proposed. This method discusses the path of the transformation of ethnic physical education in colleges and universities through the analysis of the technological advantages in the 5G era. The experimental results show that: at present, under the influence of 5G technology, an important development path of ethnic physical education in colleges and universities is the modernization of education informatization. Through the construction and application of mobile information system, it can meet the increasing diversified sports needs of college students and promote the reform of college physical education. The mean value of competition video of film and television works related to classroom teaching content played before class is 4.576 standard deviation 0.673. Conclusion. On the basis of full use of 5G technology, teaching elements should be optimized, teaching resources should be enriched, and teaching mode should be reconstructed to promote the transformation of PHYSICAL education to digital information teaching.