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The zigzag defects in a rubbed polyimide aligned surface stabilized ferroelectric liquid crystal cell may be eliminated by applying a low frequency AC electric field in the SmC* phase. The cell shows uiiiform contrast, good bistability and fast response.
This paper introduces a novel AE intelligent sensor networks system. The system is composed of three parts: the wide band AE sensors, the real-time signal acquisition and processing nodes and an intelligent information terminal. This system acquires AE events from the reinforced concrete structure through its wide band AE sensors, and then extracts the AE… (More)