The resultant normalized frequency has units of half-cycles/sample or equivalently cycles per 2 samples. Sometimes, the unnormalized frequency is represented in units of radians/second (angular frequency), and denoted by When is normalized by the sample-rate (samples/sec), the resulting units are radians/sample.ometimes, the unnormalized frequency is represented in units of radians/second (angular frequency), and denoted by When is normalized by the sample-rate (samples/sec), the resulting units are radians/sample.
Hilum (noun). the eye of a bean or other seed; the mark or scar at the point of attachment of an ovule or seed to its base or support; -- called also hile. Hilum (noun). the part of a gland, or similar organ, where the blood vessels and nerves enter; the hilus; as, the hilum of the kidney.
Summary Information: Hilar Lymph Nodes. Hilar Lymph Nodes: Hilar lymph nodes are glands that are a part of the immune system and are located where the lungs meet the bronchi. Hilar lymph nodes consist of lymphatic tissues enclosed by a fibrous capsule.They contain scavenging white blood cells that fight infection and its spread.wollen hilar lymph nodes are often a sign of disease or infection. Hilar lymph nodes contain sinuses, germinal centers, trabeculae, scavenger cells, and reticular fibers.