The rack cylinder is an important part of the pile leg structure of the jack up platform. Because of its complex structure, the flow field around the rack cylinder is different from that around the ordinary cylinder, which brings difficulties to the research of the rack cylinder. In this paper, using CFD(Computational Fluid Dynamics) solved the flow field of chords with different rack height and rack width under different KC and Re, the characteristics of the flow field around the cylinder with rack are obtained. The results show that Re, KC, rack height and rack width all have different effects on the flow field. When Re and KC are constant, Cd will increase with the increase of rack height ratio, the change of Cd and Cl is not significant, while the change of Cd and Cl varies with Re when the chord structure is fixed.

With the development of the times, Chinese traditional culture not only has a positive impact on the economy, but also restricts the development of the economy. The cultural heritage and development of a country depends to a certain extent on its own strength. Traditional culture is cultural and national, but also non-renewable. In the current international trade, traditional culture and international trade are mutually influenced, and the relationship between the two is inseparable. The position of cultural industry and related cultural commodities in international trade is becoming more and more important. Under the influence of economic globalization, the international cultural product trade market is constantly expanding, and a series of problems arising from this need to be highly valued. We should strengthen cultural exchanges, promote the development of economic exchanges, reduce differences between languages, and attach importance to the development of science and technology. Only with good material life and advanced science and technology can cultural trade have a considerable market and attractiveness. At the same time, the problem of cultural barriers cannot be underestimated. Traditional culture needs to be managed carefully, and one’s own culture needs to be carefully maintained. Only by fully protecting traditional culture and making it continue to develop can we continue to create traditional cultural products.

The rapid development of information technology has continuously promoted the informatization of education. Information technology has had a profound impact on education, and teachers are also facing new challenges. TPACK has become one of the important qualities of teachers in the information age. TPACK theory emphasizes the intersection and deep integration of technology, subject knowledge, and pedagogical knowledge. Through the investigation and study of current primary school teachers’ TPACK, it is found that primary school teachers generally lack the deep integration of technical knowledge and subject teaching content. Research on strategies to improve TPACK for primary school teachers.

Seed storage proteins of different solubility were extracted and denatured subunits of each protein were evaluated with malting barley quality parameters. Its been known that each subunit of seed storage protein encoded by each gene and subunit profiles were highly related to end-use quality in cereals. The purpose of this study is to provide selection criteria for high quality malting barleys with aid of bichemical-genetic information. Total 13 regional test lines and three locations (Naju, Jinju, and Jeju) were incorporated in this study. Albumin and hordein were extracted, denatured, and separated in 12% SDS-PAGE. Presence and absence of subunits of each protein were scored. Dendrogram (using XLSTAT program) was constructed to evaluated the relatedness of lines. The correlation between band profiles and quality test were assessed through Agglomerative Hierarchical Clustering (AHC) for statistics analysis. Hordein subunits can be classified into four groups, A, B, C, and D group. In general, hordein fractions contribute higher than albumine to determine malting quality. Specific molecular weight ranges (97.4-31.0, 66.2-31.0, and 45.0-31.0 kDa) of subunits were highly correlated with malting barley quality parameters. The subunit information would be directly incorporated in providing selection criteria for high quality malting barley in the malting barley breeding program.