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Reversible logic has attracted much attention in recent years especially when the calculation with minimum energy consumption is considered. This paper presents two novel approaches for designing reversible 4-bit comparator based on parity-preserving gates, which can detect any fault that affects no more than a single logic signal. In order to construct the comparator, three variable EX-OR gate (TVG),...
Based on the similarity between the regularity for change of technical condition of vehicle and biological population, the paper proposes a simulation model for the overall technical state of system vehicle. First a state transition equation of vehicle service life and a transition equation of vehicle accumulated mileage to measure the number of retired vehicles in a system are established. Then based...
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