The objective of this research is to establish a better understanding of the current landscape of online learning research and development. Data were collected from the Web of Science (including SCI-EXPANDED, SSCI, and AHCI), which contains articles published from 2004 to 2022. A total of 25,382 pieces of data were collected. The data were visualized and analyzed using Citespace. The results show that the USA, China, and England are the main research countries in online learning; the Open University, Nanyang Technology University, and Monash University are the main research institutions; and Hwang Ggo-Jen, Huang Yueh-Min, and Chen Nian-Shing were the lead researchers. Major research topics in the field of online learning include MOOCs, flipped classrooms, COVID-19, computer-supported collaborative learning, the technology acceptance model, communities of inquiry, and distance learning. Meanwhile, each topic includes some classical literature. Computers & Education, Educational Technology Research and Development, the Internet, and Higher Education are three highly cited journals. Research hotspots mainly include three types of terms: student-related, learning-system-related, and teacher-related. Finally, we proposed further study ideas for future paths.

Unity3D is a cross-platform professional game engine which is super hot in recent years. Its graphics, audio and video, lighting, physical effects can simulate the real world environment, making the user feel immersive and consistenting high praise by the game designers. Products produced by Unity3D are more and more widely used in the production and various aspects of life. In this paper, it has been researched on the 3D display, virtual roaming and the application of the simulation system.

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With the development of cloud computing network, cloud computing assisted instruction (CCAI) has consequently drawn increasing attention. The application of cloud computing in education and teaching has injected fresh blood into our education field and has promoted the development of education informationization and the transformation of the concept. The paper expounds the concept of cloud computing and CCAI, the characteristics of CCAI, discusses the principle of the application of CCAI, and points out the issues that should be paid attention to in the application of CCAI.

Abstract. Along with the arrival of twenty-first century, information technology develops very rapidly, and computer technology has gradually penetrated into the modern life, especially the application in college teaching. The lash produced by the network teaching to traditional teaching mode and students' learning plays good role in promoting teaching; therefore, the paper describes the characteristics, advantages and disadvantages of network teaching.