A method and an apparatus for switching channel connection between multiple optical channels synchronously and automatically. Particularly, in the feed-inlet tube of the present invention, particulate material is introduced into the supersonic feed jet of primary grinding fluid in almost a perpendicular fashion, with the supersonic nozzle installed in the center of the particulate material core, imparting momentum to the particulate material. A first end of the feeding portion is electrically connected to the first metal portion. The estimated joint distributions are stored in the database with each image to enable retrieval of the images by comparing the estimated joint distributions. The module includes a memory unit for storing profiles, a collector unit functioning on the basis of a wireless, locally defined network technology for collecting profiles of subscribers, a correlation unit for comparing profiles, and a signalingsynchronizing unit. The variance information is indicative of the expected response of a patient to a method of treatment.