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In order to keep a low false alarm rate of 1/year• kilometre, and in order to launch the fire alarm correctly in the initial stage of such a fire as occurred in a car, a method of threshold selection for a fire alarm system particularly applied in traffic tunnels is discussed in this thesis. Each fire alarm detector randomly collects environmental temperature rise gradients (TRG) and...
A new safety system of optical fiber detection for methane measurement is described based on the near-infrared absorption mechanism. An optical fiber methane gas detector is designed for methane gas concentration below 5% v/v. The detector bases on tunable diode laser absorption spectroscopy, scans the methane gas absorption lines locate at 1653.722 nm, uses the orthogonal lock-in amplifier technology...
This paper has focused its attention on double-cross intersection traffic control and its simulation with TSIS6.0. There are two vehicle sensors on each lane of the road, which are used to count the numbers of the waiting cars and then put them into the fuzzy controller, to change the green signal to adapt the traffic situation. The TSIS simulation using RTE has shown that the average speed has increased...
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