For efficiently generating training data, a main device includes a processor. The processor performs: a wear determination process of determining, in view of an output signal from a sub-sensor provided close to an odor sensor associated with a service user, whether the odor sensor is worn by the service user; a first acquisition process of acquiring an output signal from the odor sensor; a second acquisition process of acquiring type information indicative of a type of excretion of the service user, which has been determined by a service provider; and a training data generation process of generating h includes sensor information indicative of the output signal having been acquired in the first acquisition process from the odor sensor that has been, in the wear determination process, determined to be worn by the service user and which includes the type information having been acquired in the second acquisition process.

A glucometer having a media slot for receiving a test medium, a media reader having a sensor sensitive to a glucose level of a blood sample disposed on the test medium when introduced into the media slot, a one-way outbound communication channel, a processing unit for executing instructions stored on a computer memory element, including instructions to detect the test medium inside the media slot, operate the media reader, analyze the media reader results, generate the blood sample glucose level, produce digital data representing the blood sample glucose level, and transmit the digital data via the one-way outbound communication channel to a remote computing device, where the glucomter lacks an inbound communication channel that supports transmission from the remote computing device to the glucometer.

A gas sensor is used for determining a concentration of a predetermined gas in a measurement volume. The gas sensor comprises a light source and a detector arranged to receive light that has passed through the measurement volume. During a first measurement period, the detector is used to make a first measurement of an amount of light received in at least one wavelength band which is absorbed by the gas. The first measurement is compared to a predetermined threshold value. If the threshold is crossed, during a second measurement period the detector is used to make a second measurement of an amount of light received in at least one wavelength band which is absorbed by the gas. The concentration of said gas in said measurement volume is calculated using the first and/or second measurement.

Method and system for detecting and/or quantifying recent human presence in an environment using a calculated rate of decay of carbon dioxide concentration levels within that environment. A sensor measures the change in carbon dioxide levels over time to calculate the rate of decay to equilibrium and extrapolate recent human presence. Also provided is a method and system for quantifying recent human activity in an environment using the calculated rate of decay to equilibrium.

A computer-implemented method, a computer program product, and a system for adapting a model for estimating a concentration of particulate matter (PM) in the atmosphere includes obtaining image data, humidity data and actual PM concentration data. Visibility is determined from the obtained image data. An estimation model for estimating PM concentration is adapted, based on the determined visibility, the obtained humidity data, and the obtained actual PM concentration data.

A gas detection device and a gas detection process are capable of detecting a target gas. The sensor unit measures the target gas concentration and generates a target gas signal (con), which includes a temporal sequence of target gas signal values. If a target gas signal value is between a lower target gas threshold (con.sub.low) and a higher target gas threshold, a target gas warning is issued. If the target gas signal value is greater than the greater target gas threshold, a target gas warning is issued. In addition, an aggregation signal (STEV, TWA) is generated, which is an averaging or accumulation of several target gas signal values. If an aggregated value is between a smaller and a larger aggregation threshold (STEV.sub.low, TWA.sub.low, STEV.sub.high, TWA.sub.high), an aggregation warning is issued. If the aggregated value is greater than the larger aggregation threshold (STEV.sub.high, TWA.sub.high), an aggregation alarm is issued.

Disclosed are a method, a device, and a storage medium for measuring the nitrogen content. The method includes determining related variables associated with the nitrogen content; establishing an initial model, wherein the initial model takes the related variables as independent variables and the nitrogen content as dependent variables according to a historical operation data, and calculating parameters in the initial model; according to parameters in the initial model, obtaining parameters in a soft-sensing model by fitting; according to detected values of the related variables and the soft-sensing model, predicting the nitrogen content in real-time; and according to the predicted nitrogen content and an actual nitrogen content obtained by periodic sampling, obtaining a fusion detection result.

A method for measuring a glucose level of a blood sample by detecting the test medium inside a media slot of a glucometer, reading the test medium inside said media slot, analyzing a result of the reading, generating the glucose level of a blood sample disposed on the test medium, producing digital data representing the glucose level of the blood sample, encoding the digital data within an audio signal; and wirelessly and repeatedly transmitting the digital data until the test medium is removed.

Embodiments are disclosed of an active flow control system including one or more inlets and one or more outlets. A first outlet is configured to be fluidly coupled to an inlet of a mini-environment, and a first is configured to be coupled to an outlet of the mini-environment. The active flow control system includes one or more flow control configurations; each flow control configuration corresponds to a flow control mode. The one or more flow configurations include a configuration corresponding to a sampling mode. The sampling mode includes injecting a neutral fluid from the first outlet into the inlet of the mini-environment, and directing a mixed fluid exiting through the outlet of the mini-environment to the first inlet of the active flow control system, the mixed fluid being a combination of the neutral fluid and the fluid that was in the mini-environment before injecting the neutral fluid into the mini-environment.

Systems and methods for estimating an emission rate of at least one source are described. The system includes an anemometer, a gas sensor and a processor. The processor is configured to: receive a background concentration of the gas not affected by the at least one source and atmospheric stability 5 information associated with the sensing location; measure a set of parameters, including a concentration of a gas and a wind speed and wind direction; input the N sets of parameters, the position and height of the at least one source, the position and height of the gas sensor, the background concentration and dispersion parameters into a function relating the gas concentration to the wind 10 direction; and invert the function relating the gas concentration to the wind direction to obtain each source emission rate.