ﺑﺮﺭﺳﻲ ﻧﺤﻮﻩ ﺍﺭﺗﻌﺎﺷﺎﺕ ﺳﻴﺴﺘﻢ ﺟﺮﻡ ﻭ ﻓﻨﺮ ﻭ ﺑﺪﺳﺖ ﺁﻭﺭﺩﻥ ﭘﺮﻳﻮﺩ ﻧﻮﺳﺎﻧﺎﺕ