There is no abstract available for this article. critical exponent BV space 1-Laplacian equation × Update Abstract English Chinese Update
玉米是我国主要粮食作物,也是重要的饲料和工业原料,在国民经济发展中占有重要地位.随着经济发展、人民生活水平的提高,我国对畜产品的消耗量将不断增加,这种发展趋势将导致市场对饲料玉米的需求量大幅度增长.
On the base of the past research,selected nine index to establish index system considering the connotation of urban landscaping.Used SPSS to analyze the data and evaluates the level of urban landscaping of 31 cities by using the principal component analysis.Distinguished regions into three categories,and analyzed the superiority and inferiority each other,and advances some suggestions to improve the urban landscaping and ecological environment condition.
