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In view of the time-varying nature of the single-satellite mission in the mega constellation, the resulting overload, the vulnerability of a single node, and the high reliability requirements of the network control plane, the topology control of satellite networks for multi-layer and multi-domain mega-constellation was studied. A multi-layer and multi-domain topology description model based on Beidou grid position code was proposed. Firstly, the concepts and definitions of layer, domain, slice and element were given to realize the unified characterization of the topological characteristics of satellite nodes and inter-satellite links, and to describe the connectivity state of satellite nodes and the network topology of the entire constellation. Secondly, a topology control architecture with the on-orbit controller as the core and the ground network control as the auxiliary, was designed to provide normal operation service guarantee. Finally, the simulation platform was used to verify and analyze the subdomain division and unified characterization of the mega-constellation. The results show that the proposed topology description model can improve the real-time and accuracy of the topology control process for mega-constellation satellite networks.

Clinical pharmacology is an important discipline that bridges clinical medicine and pharmacology. In the teaching practice, it is necessary to keep up with educational reform and adopt the seminar teaching method combined with case-based learning (CBL), so as to practically improve the benefits of both 'teaching' and 'learning'. The teaching of ideology and politics in the curriculum is the key to cultivate students' high sense of responsibility and noble medical ethics, and realize the goal of moral education. At present, in the teaching of clinical pharmacology of antineoplastic drugs, there are problems such as students' weak basic knowledge of oncology pharmacology, separation of 'teaching' and 'learning' due to the traditional teaching method, outdated teaching materials, and low motivation of students. Therefore, this paper takes this part of the course teaching as an example to initially explore the role of the innovative model of 'Seminar-CBL-Ideological and Political Education ' in the teaching practice of clinical pharmacology, with the hope of stimulating the students' interest in learning, cultivating students' correct outlook on the world, life, and values, achieving the goals of 'teaching' and 'learning', and providing reference for optimizing clinical pharmacology education.

In order to study the numerical variation law of the internal ballistic overload of the guided projectile under different coated mixed charge structures, and to provide a basis for the development of a new type of high muzzle velocity and low overload propellant charge design, taking a large-caliber suppressed artillery as the simulation object, the layered combustion model of the coated propellant was established by using the one-dimensional two-phase flow theory, and the lace 37-hole nitroguanidine propellant was used as the main charge (MC) and lace 19-hole nitroguanidine coated propellant as auxiliary charge (B). The effects of mixed charges with different charge mass, different mixing ratios and different coating layer thicknesses on the internal ballistic overload value were studied by simulation calculation. The research results show that the increase of the total charge mass will increase the overload impact of the guided projectile and the muzzle velocity of the projectile ; with the increase of the thickness of the coating layer and the proportion of the coated propellant in the mixed charge ratios, the longitudinal overload and the muzzle velocity of the projectile in the chamber of the guided projectile will be decreased to a certain extent and the time point when the maximum overload occurs will be delayed; under the structure of the coated mixed charge, the influence of the proportion of coated propellant in different mixed charge ratios and the coating layer thickness of coated propellant on the launch overload of the guided projectile is greater than the muzzle velocity of the projectile, and the effect of reducing the firing overload in the chamber by increasing the proportion of coated propellant in different mixed charge ratios is the most significant.

The purpose of this study is to examine the current state of job crafting and career commitment of rural primary teachers and to analyze the relationship between the two variables as well as the influencing mechanisms through a questionnaire survey of 2,217 primary school teachers in Liaoning, Yunnan, Chongqing, Guangxi, and Guizhou. The research findings showed that rural primary teachers exhibited a moderate level of capacity for job crafting and career commitment; that job crafting positively predicted career commitment among rural primary teachers; and that teachers' self-efficacy and organizational support played mediating and moderating roles respectively in the relationship between the two variables

Based on the baseline data of the China Education Panel Survey, this paper explored the relationship between teacher training and academic performance in urban and rural samples respectively and the impact of teacher training on the urban-rural gap of students' academic performance. The results showed that: firstly, there was a significant urban-rural gap in academic performance, and the gap in high quantiles and language subjects were even larger. Secondly, the results of unconditional quantile regression showed that teacher training could improve the performance of urban students with different academic levels and rural students with intermediate or above academic levels, but it cannot improve the performance of rural students with lower academic levels. In addition, the overall effect of teacher training in urban areas is significantly higher than that in rural areas. Thirdly, different quantiles of Oaxaca-Blinder decomposition found that the endowment effect and the coefficient effect of teacher training were the important causes of the urban-rural performance gap, but the relative sizes of the two were different according to the different grades and different quantiles of performance distribution. Therefore, to increase the training opportunities and improve the training quality of rural teachers as well as enhance the resource conversion rate of rural students are of great practical significance for narrowing the urban-rural performance gap.

The present study aims to explore an embodied approach to students' deep learning; specifically, how deep learning is interactively achieved through teachers' languaging dynamics and multimodal representations in interactive lecturing in L2 higher education (HE) contexts. The purpose is to understand how an instructor's embodied and multimodal pedagogical practices of interactive teaching facilitate students' active classroom engagement in lecture sessions that are often considered a form of passive knowledge transmission. The case study focuses on the languaging dynamics mobilised by the target teacher participant, who has been recognised as a representative of teaching excellence due to an international background and rich localised teaching experience. Aligned with the theoretical underpinnings of an embodied approach to learning from a constructivist perspective, this study focuses on the multimodal repertoire employed by the teacher's use of gestures to stimulate students' responses to the pedagogically designed high-order questions. We argue that this complementarity encourages thinking and active learning in the knowledge transfer. Further, this embodied interactive teaching mode with the affordances of gestures not only supports learning potential for information transmission but also affords action potentials for cognitive thinking and projected interaction for knowledge transformation in the active learning process.