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利用Hn中已有的等模紧框架构造Hn+1中的等模紧框架;并利用Hn中已有的紧框架来构造Hn+1中的Parseval框架.最后给出了在这种方法下构造Rn中框架元素个数为n+1的比较稀疏的单位模紧框架的具体表达式.“,”We use the existing equal-norm tight frames for Hn to construct equal-norm tight frames for Hn+1. We also use the existing tight frames for Hn to construct Parseval frames for Hn+1. In addition, we give a detailed expression of sparse unit-norm tight frames with n+1 vectors for Rn in this construction.