The outbreak of the epidemic on an international scale has brought severe challenges to the Chinese language education of various universities. Both teachers and students have brought new challenges. In order to adapt to the new educational environment, teachers in major colleges and universities adjust their teaching concepts and teaching plans. Especially for international Chinese language education, it faces unprecedented challenges. International Chinese language education was affected by the epidemic and changed the traditional education model, opening a new model of online education. With the advantage of using abundant network resources, online education has highlighted its new breakthroughs, and has gradually highlighted some of the shortcomings of online education. Spoken language and pronunciation, which are particularly important in Chinese education, are affected by issues such as online education that restricts certain communication and timely feedback from students. Aiming at the problems of international Chinese online education, this article analyzes one by one and proposes corresponding solutions. Different from the online teaching of traditional subjects, In the special course of language education, certain online courses of Chinese education need to be improved.

With the continuous deterioration and rebound of Novel Corona Virus Disease worldwide, the impact on all areas of society can not be underestimated. In particular, the normalization of the pandemic has also had a profound impact on the development and adaptation of adolescents from overseas working families. There are a large number of special social groups, adolescents from overseas working families in Yanbian, China. Affected by severe pandemic normalization, these adolescents have been separated from their parents for a long time, suffering from troubles and many other problems. School adaptation is an important measure of adolescents' social adaptability. In order to explore the influencing factors of school adaptability of Chinese-Korean adolescents from overseas working families, this study did a questionnaire survey on them through the method of cluster sampling. A total of 602 valid questionnaires were collected. Among them, there are 289 adolescents from overseas working families, accounting for about 48%. The correlation and multiple regression analysis were carried out with SPSS 24.0. The results show that: 1) There is a significant correlation between the main factors; 2) Self-esteem and depression in personal factors, parental attachment in family factors, and teacher-student relationship and school performance in school factors have a significant impact on adolescents‘ school adaptability. Finally, this paper puts forward a system to strengthen the school adaptability of adolescents from Chinese-Korean overseas working families, as well as some specific intervention measures.

Databases are central to business information systems and RDBMS is most widely used for the database system. Normalization was designed to control various anomalies (insert, update, delete anomalies). However, normalized database design does not account f

Databases are central to business information systems and RDBMS is most widely used for the database system. Normalization was designed to control various anomalies (insert, update, delete anomalies). However, normalized database design does not account for the tradeoffs necessary for performance. In this research, we model a database design method considering denormalization of duplicating attributes in order to reduce frequent join processes. This model considers response time for processing each select, insert, update, delete transaction, and for treating anomalies. A branch and bound method is proposed for this model.