这是一本讲述序率理论及其应用的新书。序率可以看作是一种广义的频率。频率是正弦(函数)信号的一个重要参数,而序率是非正弦正交(函数)信号——沃尔什函牧信号——的相应参数。这一名词是1967年出现的,有其明确定义。“序率理论”这一名词首次出现于1974年,但是至今未见关于其含义和范畴的明确论述。 本书译自1977年初版原著。全书共计4章,前面另有绪论。在绪论中著者从历史的观点评述正弦函数在科学技术,特别是通信技术,发展进程中的作用,以及非正弦正交函数不同于前者的独特性质及其应用 Here’s a new book about order theory and its applications. Sequence rate can be seen as a generalized frequency. Frequency is an important parameter of a sinusoidal (function) signal, and the order is the corresponding parameter of a non-sinusoidal quadrature (function) signal - Walsh signal. The term appeared in 1967, with its clear definition. The term “order theory” first appeared in 1974, but so far no explicit discourse on its meaning and scope has been found. The book translated from the first edition of 1977 original. The book consists of 4 chapters, in front of another introduction. In the introduction, the author comments on the role of the sine function in science and technology, especially communication technology and development process, from the historical point of view, as well as the unique nature and application of the non-sinusoidal orthogonal function different from the former