The present invention provides an optical receptacle capable of reducing the optical coupling loss with the connector plug to be mated with the receptacle, and an optical module installing the receptacle. A simple frequency threshold parameter can be utilized to determine a number of common stop words if a word in the document possesses a frequency in a corpus that is more than the threshold parameter. The wheel cover includes an exhaust port, a bridge section located over the exhaust port, and a pressure sensor arrangement disposed on the bridge section. \u201d In this first use, XeF2 is used to remove the metal liner, TaN\u2014Ta, after copper CMP.