Abstract Intensity interferometry is one of the most conventional methods for measuring the length of a short light pulse (from ps to sub-ps). We attempted to apply this method to the measurement of bunch length at the Photon Factory. We tested both the second-harmonic autocorrelation method and the two-photon interference method. With both methods, we observed the autocorrelation signal of the...

In Three-dimensional (3-D) image measurement field, pattern projection measurement methods based on the image intensity analysis are expected, because those can detect more numbers of stripes order by single projection. However, in the case when the intensity difference between stripes is narrow, the detecting of stripes order becomes difficult.In order to improve the detection accuracy of stri...

Threshold functions and subjective estimations of ratios and differences are a few examples from a class of psychological functions that can be conceptualized as functions from a set of stimuli onto itself. This paper analyzes axiomatically the structural properties of a broad subset of such functions, with an emphasis on general properties of their psychological processing. Measurement-theoret...

An efficient and accurate measurement of congestion intensity helps investigate the traffic conditions at different road classes and provides useful information for transportation planning and traffic operation improvement. However, the existing traffic congestion intensity measurement models often suffer from two major problems: one is that there is no generally accepted method that can be use...