Biosensor method and system based on feature vector extraction
First Claim
1. A method of using a biosensor for identifying toxins with at least one processor, comprising the steps of:
- a) obtaining at least one time-dependent control signal generated by the biosensor, the biosensor comprising a cell including naturally-occurring, free-living, indigenous photosynthetic organisms, wherein the at least one time-dependent control signal comprises a fluorescence induction signal emitted by the photosynthetic organisms in water without the presence of one or more toxins selected from chemical, biological or radiological agents;
b) obtaining a time-dependent biosensor signal that comprises a fluorescence induction signal emitted by the photosynthetic organisms in water and in a presence of the one or more toxins selected from chemical, biological or radiological agents;
c) processing, with said at least one processor, said time-dependent biosensor signal to extract statistical features from multi-level wavelet coefficients obtained from wavelet coefficient analysis of said time-dependent biosensor signal;
d) determining, with said at least one processor, at least one parameter relating to toxicity of said water from said extracted statistical features of wavelet coefficients by comparing with said at least one time-dependent control signal;
e) identifying, with said at least one processor, which of said chemical, biological or radiological agents are present in said water from said determined at least one parameter; and
f) eliminating, through said identifying, false-positives resulting from the photo-inhibition effect.
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Accused Products
Abstract
A method of biosensor-based detection of toxins comprises 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.
13 Citations
15 Claims
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1. A method of using a biosensor for identifying toxins with at least one processor, comprising the steps of:
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a) obtaining at least one time-dependent control signal generated by the biosensor, the biosensor comprising a cell including naturally-occurring, free-living, indigenous photosynthetic organisms, wherein the at least one time-dependent control signal comprises a fluorescence induction signal emitted by the photosynthetic organisms in water without the presence of one or more toxins selected from chemical, biological or radiological agents; b) obtaining a time-dependent biosensor signal that comprises a fluorescence induction signal emitted by the photosynthetic organisms in water and in a presence of the one or more toxins selected from chemical, biological or radiological agents; c) processing, with said at least one processor, said time-dependent biosensor signal to extract statistical features from multi-level wavelet coefficients obtained from wavelet coefficient analysis of said time-dependent biosensor signal; d) determining, with said at least one processor, at least one parameter relating to toxicity of said water from said extracted statistical features of wavelet coefficients by comparing with said at least one time-dependent control signal; e) identifying, with said at least one processor, which of said chemical, biological or radiological agents are present in said water from said determined at least one parameter; and f) eliminating, through said identifying, false-positives resulting from the photo-inhibition effect. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of using a biosensor for identifying toxins with at least one processor, comprising the steps of:
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a) obtaining at least one time-dependent control signal generated by the biosensor, the biosensor comprising a cell including naturally-occurring, free-living, indigenous photosynthetic organisms, wherein the at least one time-dependent control signal comprises a fluorescence induction signal emitted by the photosynthetic organisms in water without the presence of one or more toxins selected from chemical, biological or radiological agents; b) obtaining a time-dependent biosensor signal that comprises a fluorescence induction signal emitted by the photosynthetic organisms in water and in a presence of the one or more toxins selected from chemical, biological or radiological agents; c) processing, with said at least one processor, said time-dependent biosensor signal to calculate time dependent amplitude statistics of said time-dependent biosensor signal, wherein said time dependent amplitude statistics comprise a summation of time points on said time-dependent biosensor signal of at least three orders; d) comparing, with said at least one processor, said calculated amplitude statistics with said at least one time-dependent control signal; and e) identifying and determining a concentration for, which of said chemical, biological or radiological agents are present in said water with said at least one processor, wherein the identification and determination are based on the comparison of said calculated amplitude statistics with said at least one time-dependent control signal. - View Dependent Claims (13, 14, 15)
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Specification