Chief Editor:Lai Zhongxiong,male,born in December 1966,Ph.D.,researcher,doctoral supervisor.Deputy dean of New Rural Development Research Institute,Fujian Agricuitural and Forestry University;director of Horticulturai...Chief Editor:Lai Zhongxiong,male,born in December 1966,Ph.D.,researcher,doctoral supervisor.Deputy dean of New Rural Development Research Institute,Fujian Agricuitural and Forestry University;director of Horticulturai Plant Bio-engineering Institute(Subtropical Fruit Research Institute)former deputy dean of College of Horticulture(2004-2016).展开更多
On Feb.24,an annual butter sculpture show was held in Taer Monastery of Qinghai Province,which marks the Chinese Lanterm Festival.The butter sculptures are handmade by monks in shapes of Buddha figurines,trees,flowers...On Feb.24,an annual butter sculpture show was held in Taer Monastery of Qinghai Province,which marks the Chinese Lanterm Festival.The butter sculptures are handmade by monks in shapes of Buddha figurines,trees,flowers,birds and animals.展开更多
The bipartite Turán number of a graph H, denoted by ex(m,n;H), is the maximum number of edges in any bipartite graph G=(A,B;E(G))with | A |=mand | B |=nwhich does not contain H as a subgraph. Whenmin{ m,n }>2t...The bipartite Turán number of a graph H, denoted by ex(m,n;H), is the maximum number of edges in any bipartite graph G=(A,B;E(G))with | A |=mand | B |=nwhich does not contain H as a subgraph. Whenmin{ m,n }>2t, the problem of determining the value of ex(m,n;Km−t,n−t)has been solved by Balbuena et al. in 2007, whose proof focuses on the structural analysis of bipartite graphs. In this paper, we provide a new proof on the value of ex(m,n;Km−t,n−t)by virtue of algebra method with the tool of adjacency matrices of bipartite graphs, which is inspired by the method using { 0,1 }-matrices due to Zarankiewicz [Problem P 101. Colloquium Mathematicum, 2(1951), 301].展开更多
The Canton fans made in China have becometreasures in the world. As a product of theintegration of Chinese and Western culturesunder the background of trade between Chinaand the West in the 18th and 19th centuries,the...The Canton fans made in China have becometreasures in the world. As a product of theintegration of Chinese and Western culturesunder the background of trade between Chinaand the West in the 18th and 19th centuries,the Qing Dynasty Canton export fans bear thememory and charm of Chinese ivilization.展开更多
文摘Chief Editor:Lai Zhongxiong,male,born in December 1966,Ph.D.,researcher,doctoral supervisor.Deputy dean of New Rural Development Research Institute,Fujian Agricuitural and Forestry University;director of Horticulturai Plant Bio-engineering Institute(Subtropical Fruit Research Institute)former deputy dean of College of Horticulture(2004-2016).
文摘On Feb.24,an annual butter sculpture show was held in Taer Monastery of Qinghai Province,which marks the Chinese Lanterm Festival.The butter sculptures are handmade by monks in shapes of Buddha figurines,trees,flowers,birds and animals.
文摘The bipartite Turán number of a graph H, denoted by ex(m,n;H), is the maximum number of edges in any bipartite graph G=(A,B;E(G))with | A |=mand | B |=nwhich does not contain H as a subgraph. Whenmin{ m,n }>2t, the problem of determining the value of ex(m,n;Km−t,n−t)has been solved by Balbuena et al. in 2007, whose proof focuses on the structural analysis of bipartite graphs. In this paper, we provide a new proof on the value of ex(m,n;Km−t,n−t)by virtue of algebra method with the tool of adjacency matrices of bipartite graphs, which is inspired by the method using { 0,1 }-matrices due to Zarankiewicz [Problem P 101. Colloquium Mathematicum, 2(1951), 301].
文摘The Canton fans made in China have becometreasures in the world. As a product of theintegration of Chinese and Western culturesunder the background of trade between Chinaand the West in the 18th and 19th centuries,the Qing Dynasty Canton export fans bear thememory and charm of Chinese ivilization.
文摘目的:探讨Bite Turbo应用于自锁矫治技术中治疗青少年深覆牙合的效果。方法:纳入江门市新会区第二人民医院2020年1月至2021年1月期间收治的70例青少年深覆牙合患者作为研究对象,根据电脑生成随机数字表法分为两组,对照组35例给予3M自锁矫治器+平面导板治疗,观察组35例给予3M自锁矫治器+Bite Turbo治疗。观察并比较两组治疗后的颌骨改变情况及上颌牙齿位置与角度测量结果。结果:治疗后,两组的下齿槽座角(SNB角)、上齿槽座角(SNA角)、上下齿槽座角(ANB角)均较治疗前减小,且观察组均小于对照组(P<0.05)。治疗后,两组的Apg线至上中切牙切缘的垂直距离(Apg-U1距)、上中切牙缘至NA连线垂直距离(U1-NA距)、翼上颌裂后缘至上颌磨牙远中邻面垂直距离(Ptm-U6距)均较治疗前缩小,且观察组均小于对照组(P<0.05)。结论:在采用自锁矫治技术治疗青少年深覆牙合时,应用Bite Tur bo可有效改善牙齿形态,调整上颌牙齿的位置与角度。
