Search

The new generation of digital technology brings new opportunities and new momentum to the development of sports service industry. Reviewing literature and case analysis were used in this study as the methods. Examine the important value and theoretical mechanism of high-quality development of sports service industry empowered by digital technology. Research analyzes the following practical application scenarios and typical cases systematically: The sports competition and performance industry enabled by 5G technology, the sports and health promotion industry empowered by blockchain technology, and the sports venue service industry empowered by Internet technology. And put forward the overall promotion strategy based on macro, medium, and micro levels. It is concluded that the rise and application of digital technology provide important technical support for the high-quality development of modern sports service industry. And it keeps great value to the optimization of sports service structure, the integration of formats, the matching of supply and demand, and the improvement of efficiency. Digital technology enables high-quality development of modern sports service industry. At the macro level, the top-level design led by the government is supposed to be strengthened. At the middle level, a multi-industry coordination mechanism is supposed to be established. At the micro level, we should perfect the professional talent cultivation system oriented by market demand.

Camellia huana is an endangered species with a narrow distribution in limestone hills of northern Guangxi and southern Guizhou provinces, China. We used one chloroplast DNA (cpDNA) fragment and 12 pairs of microsatellite (simple sequence repeat; SSR) markers to assess the genetic diversity and structure of 12 C. huana populations. A total of 99 alleles were detected for 12 polymorphic loci, and eight haplotypes and nine polymorphic sites were detected within 5200 bp of cpDNA. C. huana populations showed a low level of genetic diversity (n = 8, Hd = 0.759, Pi = 0.00042 for cpDNA, NA = 3.931, HE = 0.466 for SSRs), but high genetic differentiation between populations (FST = 0.2159 for SSRs, FST = 0.9318 for cpDNA). This can be attributed to the narrow distribution and limestone habitat of C. huana. STRUCTURE analysis divided natural C. huana populations into two groups, consistent with their geographical distribution. Thus, we suggest that five natural C. huana populations should be split into two units to be managed effectively.

Camellia nitidissima is an endangered species. This species contains two varieties. Here, we report on the chloroplast genomes of C. nitidissima var. nitidissima from Fangcheng (GenBank accession MT157617) and Nanning (MT157618), as well as one sample of C. nitidissima var. microcarpa (MT157619) from Nanning. The total chloroplast genomes of C. nitidissima var. nitidissima Fangcheng and Nanning samples are 156,596 bp and 157,567 bp in length, respectively. C. nitidissima var. microcarpa (MT157619) genome is 157,407 bp in length. The three samples possess GC contents of 37.3%, 128 genes, comprising 86 protein-coding genes, 34 tRNA genes, and 8 rRNA genes.

In recent years, campus card system (CCS) has been widely used in universities. At the same time, the scale of the data stored in the database of the CCS is also increasing rapidly. Therefore, it would be better to adopt data mining techniques to reveal the status, causes and trends of students’ consumption data. In this research, the K-Means clustering algorithm is applied to the students’ consumption behavior. The Apriori algorithm is used to study the students’ consumption behavior and performance. The results not only improve the efficiency of student work but also help to build smart campus for our university.

Over the years, sport has been more and more popular. However, there’s usually some athletic injury in the course of the movement, therefore, sports injuries have been more and more concerned by the community. With the development of science and technology, in all aspects, the science can be used to conduct more effective exercise. Therefore, based on researching the theoretical knowledge of action screening and rehabilitation physical training, the scientific methods were applied to improve the damage situation of volleyball, so as to make volleyball players who are injured in the movement could be able to recover more quickly.

High-efficient visual search ability is the key for the athletes to win their games. Visual search is an important way for the athletes to catch effective information on site within complicated environment as well as the manifestation of their regulating and controlling their mental status and skill abilities within complicated environment. Maintaining an appropriate level of anxiety during exercises and contests could ensure higher visual search efficiency and is helpful for better bringing the skills of the athletes into play. Excessive anxiety will have larger interferences on the visual search efficiency of the athletes and the visual research efficiency will be reduced, resulting in the abnormal performance of the skill levels of the athletes. To optimize and regulate the visual search efficiency of the athletes could ensure the athletes to bring their competitive skills into best play.

Objective To identify the genetic abnormality responsible for osteoarthritis (OA), avascular necrosis (AVN) of the femoral head, and Legg-Calve-Perthes disease in a single family, and to determine factors responsible for the distinct phenotypes manifested by different family members. Methods Forty-two members of a 5-generation family were recruited and investigated. Diagnosis was made by independent orthopedic surgeons and radiologists. Histopathologic changes of the diseased tissue were examined. Linkage analysis was performed with markers spanning the COL2A1 locus. Haplotypes were constructed and mutation of the gene was detected. Structures of the wild-type and mutant proteins were modeled. Results Sixteen affected members were identified (5 with isolated precocious hip OA, 6 with AVN of the femoral head, and 5 with Legg-Calve-Perthes disease). A p.Gly1170Ser mutation of COL2A1 cosegregated with the 3 diseases and was absent in controls. Of note, age at onset in relation to the closure status of the femoral head epiphysis was associated with the diseases, with Legg-Calve-Perthes disease presenting prior to closure (at ages 6–14 years), AVN of the femoral head presenting during closure (at ages 15–18 years), and precocious OA of the hip presenting after closure (at ages 21–34 years). Molecular modeling predicted that the serine-to-glycine substitution loosens the helical structure of the protein. Conclusion The p.Gly1170Ser mutation of COL2A1 in the family described is responsible for pathology confined to the hip joint, which presents as isolated precocious hip OA, AVN of the femoral head, or Legg-Calve-Perthes disease. Age at onset in relation to closure of the femoral head epiphysis appears to be a critical factor in determining disease pattern.