Reflectance values express the percentage of light that is reflected back from a surface, the difference having been absorbed or transmitted by the surface. Reflectances of room surfaces are used in determining coefficient of utilization values for luminaires.
The last three lines show you how to define your own awk function. The format is simple -- type function, then the function name, and then the parameters separated by commas, inside parentheses. After this, a { } code block contains the code that you'd like this function to execute.
â¢ Cpk is an process capability index that assesses how close. the process mean is from the specification limit. â¢ If the process is in control and the distribution is well within. the specification limits then the difference between the. Upper specification (U) and then mean or the difference.