tailieunhanh - Synchronization

Synchronization is the coordination of events to operate a system in unison. The familiar conductor of an orchestra serves to keep the orchestra in time. Systems operating with all their parts in synchrony are said to be synchronous or in sync. Firefighters marching in a parade Some systems may be only approximately synchronized, or plesiochronous. For some applications relative offsets between events need to be determined, for others only the order of the event is important. Today, synchronization can occur on a global basis due to GPS-enabled timekeeping systems | Synchronization Chapter 5 Clock Synchronization Computer on 2144 2145 I 2146 I 2147 I E Time according to local clock which compiler I I I runs created Computer on which editor - 2142 I 2143 2144 I 2145 1 Í Time according to local clock runs created When each machine has its own clock an event that occurred after another event may nevertheless be assigned an earlier time. Physical Clocks 1 Earth s orbit At the transit of the sun n days later the earth has rotated fewer than 360 To distant galaxy Earth on day n at the transit of the sun A transit of the sun occurs when the sun reaches the highest point of the day Earth on day 0 at the transit of the sun To distant galaxy Computation of the mean solar .