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Circuit design under process variation can be formulated mathematically as a robust optimization problem with a yield constraint. Existing methods force designers to either resort to overly simplified circuit performance model, or rely on simplistic variability assumptions. On the other hand, accurate yield estimation must incorporate a sophisticated(More)
In general, two major factors effect on the measurement precision of ultrasonic transit-time gas flowmeter: the calculations of gas velocity distribution in the pipe and the measurements of the transit time of ultrasonic transmitting from one transducer to another. In this paper, considering the affect factors, a new design of ultrasonic gas flow meter is(More)
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