ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489938

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489939

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489940

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489941

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489942

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

Usual methods of spectrum estimation allow very strong frequencies to affect the spectrum estimates at distant frequencies, because the weighting function (spectrum window) cannot be made identically zero over the rejected range of frequencies. To give bounds for this error, a pair of windows, one with positive side lobes (Bartlett), the other with negative side lobes (modified Bartlett), are used simultaneously. Thus we demonstrate the error reduction achieved by detrending and prewhitening an example economic time series. The details of the spectrum windows, and a discussion of confidence limits for the spectrum, are given in the appendix. A program for the IBM 650 is available.

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489943

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

Two continuous chemical processes, regarded as input-output systems, were probed with stationary noise, and their frequency response characteristics estimated from spectral analyses of the input and output records. Statistical confidence bands for the estimated system gitin and phase were computed. The noises were superimposed on steady operating levels of the systems, and the analyses conducted, following Goodman [l], on the assumption that the output fluctuation in each case was the sum of a linear operation on the input fluctuation and a corrupting noise uncorrelated with the input.

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489944

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489945

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

When everything possible has been done to produce articles with long lives, there remains the possibility that a further improvement in the articles may be obtained by running them, for some time, under realistic conditions. The fraction that does not fail may have a longer mean remaining life than the original articles. In this paper conditions on the life distribution of the original articles are found which will insure this. The Weibull, gamma, exponential, extreme value and log-normal life distributions are examined in detail. The most interesting case is the log-normal, for which it is always possible to increase the mean life to any extent desired by continuing to test until a sufficiently large number of articles have failed.

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489946

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0040-1706    

DOI:10.1080/00401706.1961.10489947

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor