…about applied maths, but about the range of problems you run into when you try to apply them e.g. Numerical Methods for Scientists and Engineers (1962) Introduction To Applied Numerical Analysis (1971) Digital Filters (1977) Methods of Mathematics Applied to Calculus, Probability, and Statistics (1985)
……[..] “但如果你不喜欢这两个例子，那让我来说说近年来被吹捧得最厉害的定律——不确定性原理。碰巧最近我参与编写了一本关于数字滤波器的书［8. R. W. Hamming, Digital Filters, Prentice-Hall, Englewood Cliffs, NJ., 1977.］，当时我对这个领域知之甚少。结果我很早就提出了一个问题：‘为什么我非得用……的方式来做所有分析？’
…[..] "But if you do not like these two examples, let me turn to the most highly touted law of recent times, the uncertainty principle. It happens that recently I became involved in writing a book on Digital Filters [8. R. W. Hamming, Digital Filters, Prentice-Hall, Englewood Cliffs, NJ., 1977.] when I knew very little about the topic. As a result I early asked the question, "Why should I do all the analysis in terms…
……不是关于应用数学本身，而是关于你在尝试应用它们时会遇到的各种问题，例如：《科学家与工程师的数值方法》（1962）、《应用数值分析导论》（1971）、《数字滤波器》（1977）、《微积分、概率与统计中的数学方法》（1985）
…about applied maths, but about the range of problems you run into when you try to apply them e.g. Numerical Methods for Scientists and Engineers (1962) Introduction To Applied Numerical Analysis (1971) Digital Filters (1977) Methods of Mathematics Applied to Calculus, Probability, and Statistics (1985)
如果我没记错的话（IIRC），汉明（Hamming）的书《数字滤波器》（1989）里有一节专门讲只使用系数正负号的FFT。它的效果出奇地好。
IIRC, Hamming's book "Digital Filters" (1989) has a section on FFTs with only the sign of the coefficient being used. It performed surprisingly well.
……[..] “但如果你不喜欢这两个例子，那让我来说说近年来被吹捧得最厉害的定律——不确定性原理。碰巧最近我参与编写了一本关于数字滤波器的书［8. R. W. Hamming, Digital Filters, Prentice-Hall, Englewood Cliffs, NJ., 1977.］，当时我对这个领域知之甚少。结果我很早就提出了一个问题：‘为什么我非得用……的方式来做所有分析？’
…[..] "But if you do not like these two examples, let me turn to the most highly touted law of recent times, the uncertainty principle. It happens that recently I became involved in writing a book on Digital Filters [8. R. W. Hamming, Digital Filters, Prentice-Hall, Englewood Cliffs, NJ., 1977.] when I knew very little about the topic. As a result I early asked the question, "Why should I do all the analysis in terms…