To improve the detection and diagnosis precision and timeliness and realize multisensor composite faults, a double redundancy strategy, that is, spatial redundancy and time redundancy, is utilized.
Double redundancy refers to spatial redundancy and time redundancy. The former utilizes the redundancy information among all the sensors, while the latter uses the redundancy information of each sensor over consecutive time.
(3) Input the normalized training data into spatial redundancy submodel and time redundancy submodel.
The system methods of information authenticity control use program and time redundancy
realized at formalization and organization of various data processing technology variants.
So, the ECC alone is useful for designing a fail-stop kind of system but it suffers from high time redundancy. Other software implemented fault- tolerance schemes are also towards fail-stop kind.
Parity bits, Hamming Code, BCH, and Cyclic redundancy codes in which bits are interpreted as coefficients in a polynomial etc.) that are capable of detecting and correcting a few bit errors on using both code and high time redundancy. For example, BCH (63,45) can correct only 3 errors in a 45 information bits.
In order to design an ultra reliability in computing application, it is necessary to adopt the strategy of defensive programming based on code and time redundancy (i.e.
Parallel redundancy is shown in Figure 4, while serial redundancy (commonly referred to as "master/slave" time redundancy
) is illustrated in Figure 5.
The Prestatyn offices are expected to close by Christmas, by which time redundancy
notices should have been issued.
Some of the more common forms of redundancy are software redundancy, time redundancy, and hardware redundancy.
Time redundancy uses a re-try technique to correct transient faults.
Performance will usually go down with the addition of software or time redundancy. In these cases, time that might otherwise be spent running the application must be spent performing fault tolerant housekeeping tasks.