Underwater wireless sensor networks (UWSNs) have become a new hot research area. However, due to the work dynamics and harsh ocean environment, how to obtain an UWSN with the best systematic performance while deploying as few sensor nodes as possible and setting up self-adaptive networking is an urgent problem that needs to be solved. Consequently, sensor deployment, networking, and performance calculation of UWSNs are challenging issues, hence the study in this paper centers on this topic and three relevant methods and models are put forward. Firstly, the normal body-centered cubic lattice to cross body-centered cubic lattice (CBCL) has been improved, and a deployment process and topology generation method are built. Then most importantly, a cross deployment networking method (CDNM) for UWSNs suitable for the underwater environment is proposed. Furthermore, a systematic quar-performance calculation model (SQPCM) is proposed from an integrated perspective, in which the systematic performance of a UWSN includes coverage, connectivity, durability and rapid-reactivity. Besides, measurement models are established based on the relationship between systematic performance and influencing parameters. Finally, the influencing parameters are divided into three types, namely, constraint parameters, device performance and networking parameters. Based on these, a networking parameters adjustment method (NPAM) for optimized systematic performance of UWSNs has been presented. The simulation results demonstrate that the approach proposed in this paper is feasible and efficient in networking and performance calculation of UWSNs.
This paper took marketing professional curriculum "Marketing Planning" course as an example to construct four learning-platforms, which were a learning mutual aid platform, an interactive platform, a practice and innovation platform and an achievement display platform, to explore MOOC flip classroom teaching mode in the teaching process based on the teaching requirements of application-oriented universities to learn mainly, strengthen self-learning, and develop extensively elicitation, discussion, participation, experience, perception and practice. In order to get cycle progressive teaching model of make the students autonomous and mutual learn, internalize and practice knowledge, apply the achievement of knowledge, to enhance students' interest and ability in learning, to provide reference for teaching reform of other application-oriented universities.
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