No abstract

Seed dormancy is an adaptive response of plants to environmental changes during long-term evolution. It plays an important role in plant survival and propagation. Acer cinnamomifolium, a plant species endemic to China, is an excellent garden and street tree species. However, dormancy and germination characteristics of A. cinnamomifolium seeds are not currently known. In the present paper, the mature seeds were used as experimental materials and we investigated the effect of temperature including alternating temperature, light, after-ripening, stratification and phytohormone on seed dormancy release and germination. After being incubated for 30 days, 0 to 10% of the seeds germinated in constant temperature (10, 15, 20, 25 and 30°C), while in alternating temperature regimes (20/10, 25/15 and 30/20°C), seed germination was < 35%. Dormancy release and germination of seeds can be increased by after-ripening, cold stratification and phytohormone treatments. We concluded that A. cinnamomifolium seeds have a non-deep physiological dormancy. Cold stratification at 4°C for 30 days and incubation thereafter at 20°C were found to be optimal for dormancy release and high seed germination.

With the advent of the information age, information technology education in primary and secondary schools shoulders the important task of cultivating innovative and skilled talents for the country. The development of information technology education is constantly enriched and improved with the development of society and technological progress. "China's Educational Modernization 2035" proposes that by 2035, education modernization will be achieved on the whole and become an education powerhouse. At present, information technology education has been ubiquitous in our country's primary and secondary schools, and a few good results have been achieved, but there are still a lot of problems caused by all kinds of aspects. This article mainly makes use of the literature analysis method to analyze the current situation of information technology education in primary and secondary schools in China to explore the development trend of information technology education in primary and secondary schools under the background of China's education modernization in 2035, so that educators all over the country can be based on this new information environment, grasp the present and focus on the future, so as to promote the healthy and rapid development of information technology education in primary and secondary schools, to promote the steady progress of China's educational modernization.

Aiming at the problem of portrait of members in shopping malls, this paper analyzes the similarities and differences of consumption behaviors between member groups and nonmember groups, and constructs the LRFMC model with [Formula: see text]-means algorithm to analyze the value of membership. Second, active states of members are divided according to the consumption time interval, and KNN algorithm model is established to predict member states and used to predict the membership status. Finally, it discusses which types of goods are more suitable for promotional activities and can bring more profits to the shopping mall.