Interpretation of the response of continuous radon monitors to transient radon concentrations.
Continuous monitoring of radon concentrations can yield substantially more information than grab sampling in situations where concentrations vary significantly with time. Although several continuous monitors have been designed, calibration is usually difficult and not completely rigorous. In this work a simple and rigorous method is developed for the calibration and operation of all types of continuous flow-through instruments. Theoretical and experimental verification of the method is provided.
Analysis of quasicontinuous radon monitor response.
Continuous radon monitors respond quickly to changes in radon concentration but bear uncertainties due to the fact that the radon concentration in the detector changes within a counting interval. This disadvantage can be overcome by applying quasicontinuous sampling, where the detector chamber is sealed after the sample has been drawn, so that the radon concentration does not change while counting. The chamber is usually kept closed for 15 min or longer and subsequently flushed or evacuated before the new sample is taken. This paper presents a forward-marching algorithm suitable for the analysis of the response of quasicontinuous radon monitors. The method can be used to obtain both 222Rn and 220Rn concentrations in the gas sample.
CMEOC—An expert system in the coal mining industry
Abstract This paper introduces an expert system in the mining industry, called the Coal Mining Expert and Optimization Consultation System (CMEOC). The paper mainly describes the architecture of this system, including the knowledge base, inference engine, and relevant optimization techniques. The techniques include multi-objective programming, fuzzy sets, and integer programming. The application results present evidence of the usefulness of the system.