BIOSENSOR METHOD AND SYSTEM BASED ON FEATURE VECTOR EXTRACTION

摘要

A method of biosensor-based detection of toxins includes the steps of providing at least one time-dependent control signal generated by a biosensor in a gas or liquid medium, and obtaining a time-dependent biosensor signal from the biosensor in the gas or liquid medium to be monitored or analyzed for the presence of one or more toxins selected from chemical, biological or radiological agents. The time-dependent biosensor signal is processed to obtain a plurality of feature vectors using at least one of amplitude statistics and a time- frequency analysis. At least one parameter relating to toxicity of the gas or liquid medium is then determined from the feature vectors based on reference to the control signal. A water or air quality sensor system 10 includes photosynthetic organisms as a biosensor in an air or water medium to be monitored or analyzed for the presence of one or more toxins, a detector 12 proximate to the biosensor for measuring a time-dependent biosensor signal from said biosensor, and a processor 30 for analyzing the time-dependent biosensor signal to obtain a plurality of feature vectors using amplitude statistics or time-frequency analysis, wherein the processor determines at least one parameter relating to toxicity of the medium from the feature vectors.