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本文首先引入了一类新的m阶Walsh谱;其次讨论了其性质和实质;最后给出了求最佳m次逼近的一种方法。
In this paper, we first introduce a new class of m-order Walsh spectrum. Secondly, we discuss the nature and essence of m-order Walsh spectrum. Finally, a method to find the best m-th order approximation is given.