A pressure-volume-temperature (PVT) system for characterization of a reservoir fluid, includes: a temperature control unit; a sample cell disposed inside the temperature control unit for accommodating the reservoir fluid, the temperature control unit includes a housing and an interior chamber defined by a space between the sample cell and the housing; and a fluid supply unit that provides a temperature control fluid to the interior chamber to control a temperature of the sample cell. The fluid supply unit includes a first container providing a first fluid having a first temperature as the temperature control fluid for a first stage of PVT analysis and a second fluid having a second temperature that is different from the first fluid as the temperature control fluid for a second stage for PVT analysis.

Methods, systems, and devices that takes advantage of the unique fluid dynamics involved when oscillating flow across a sensor or sensor array. A time-variant source of information about an agent(s) of interest being sensored is established. This source of information is used in machine learning algorithms to speed up the time and accuracy of agent classification and identification.

A VOC detecting and warning method is provided. Firstly, an actuating-and-sensing module having a gas transportation actuator and a gas sensor is provided. Then, the gas transportation actuator guides a specified amount of gas to the gas sensor for obtaining plural monitored values, each of which is generated according to a result of detecting volatile organic compounds of the gas in each monitoring time interval by the gas sensor. All the monitored values obtained in a unit time period are added together and calculated, so that an average comparison value is obtained. If the average comparison value is determined greater than an injury threshold defined according to the VOC inhalation amount affecting the health of a human body, the actuating-and-sensing module issues a warning notification to notify the user to take protective measures.

A system for monitoring a level of gas comprises a gas testing device, an adapter, a mobile device, and a server. The gas testing device comprises a sensor and a processor. The sensor collects a measurement of gas in a location. The processor receives a signal including the measurement, generates data based on the signal, and stores the data in memory. The adapter is coupled to the gas testing device by a serial port and comprises an adapter processor and an adapter memory. The adapter processor receives the data and stores the data in the adapter memory. The mobile device is coupled to the adapter and receives the data from the adapter. The server is coupled to the mobile device via a network and comprises a server processor and a server memory. The server processor receives the data from the mobile device and stores the data in the server memory.

A wearable device for sensing airborne narcotics. In embodiments, the wearable device may comprise an air intake; an ionization apparatus for ionization of molecules of airborne narcotics, wherein the apparatus may comprise a heated surface in fluid communication with the intake for heating molecules of airborne narcotics to ionize said molecules; at least one collector for receiving ions resulting from said ionization, and generating a signal; an apparatus for creating electrical potential to draw said ions to said at least one collector; and an alarm generator for generating an alarm if a time gap between said creation of ions and said signal indicates a presence of an airborne narcotic.

An exemplary method adjusts one or operating characteristics of an oxygen utilizing system based on atmospheric oxygen content. The method includes detecting, using one or more atmospheric sensors, atmospheric conditions for an atmosphere surrounding the oxygen utilizing system and determining the atmospheric oxygen content based on the detected atmospheric conditions. The method further includes adjusting the one or more operating characteristics of the oxygen utilizing system based on the atmospheric oxygen content.

A gas analysis device for analyzing a compound gas and H.sub.2O gas produced in a main reaction in which an aqueous solution including a compound and water is vaporized, includes a first concentration calculating unit that calculates a concentration of the compound gas, a second concentration calculating unit that calculates a concentration of the H.sub.2O gas, an analysis unit that compares a first actual concentration which is the concentration of the compound gas calculated by the first concentration calculating unit with a first ideal concentration which is the concentration of the compound gas in case that the main reaction proceeds ideally, and that compares a second actual concentration which is the concentration of the H.sub.2O gas calculated by the second concentration calculating unit with a second ideal concentration which is the concentration of the H.sub.2O gas in case that the main reaction proceeds ideally and an output unit.

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 method of monitoring catalytic performance of a catalyst used in a reforming process, comprising a) collecting gaseous component data from the reforming process; b) calculating a gaseous component ratio from the gaseous component data; and c) utilizing the gaseous component ratio to estimate an amount of catalytic activity remaining in the catalyst used in the reforming process, a number of days on stream remaining for the catalyst used in the reforming process, or both.

A portable communication device includes one or more miniature sensors to sense one or more environmental gases. A processor is coupled to the miniature sensors and is configured to enhance location detection by determining a sensor signal transition. The sensor signal transition is caused by subsequent exposures of at least one of the miniature sensors to environmental gases of a first air composition and a second air composition. The first air composition and the second air composition are respectively associated with a first location and a second location.