Abstract: An active sensor calibration system includes a plurality of sensors configured to measure at least one physical quantity. Each sensor is configured to output a signal indicating at least one measured physical quantity. An electronic scenario library module is configured to store a plurality of scenarios. Each scenario is configured to excite two or more selected sensors among the plurality of sensors to generate redundancy among the selected sensors based on physical quantity models. An electronic calibration module is in signal communication with the plurality of sensors and the scenario library. The calibration module is configured to select at least one scenario from the scenario library module, determine at least one possible un-calibrated sensor among the plurality of sensors, and to identify a positive un-calibrated sensor in response to executing the at least one selected scenario.

Abstract: The present application relates to geophysical survey, particularly provides an inversion velocity model, a method for establishing the same and a method for acquiring images of underground structure. The method for establishing inversion velocity model comprises: converting observation seismic records into first intermediary data which contains data with frequency no higher than a first predetermined frequency; calculating synthetic seismic records based on a set initial velocity model and converting the synthetic seismic records into second intermediary data which also contains data with frequency no higher than the first predetermined frequency; establishing an objective function based on the first intermediary data and the second intermediary data; calculating a velocity gradient of seismic wave based on the objective function; calculating a iteration step of the velocity gradient; determining the inversion velocity model based on the velocity gradient and the iteration step.

Abstract: Step detection methods and apparatus are described. According to one aspect, a footstep detection method includes obtaining accelerometer data regarding movements of a user device, filtering the accelerometer data to remove frequencies above a typical stepping frequency range of a user, after the filtering, analyzing individual ones of a plurality of cycles of the accelerometer data to determine whether any of the individual cycles corresponds to a user taking a footstep with the user device, and as a result of the analyzing, indicating at least one of the individual cycles as corresponding to the user taking a footstep.

Abstract: A system includes a plurality of sensors measuring a physical parameter; a processing unit communicatively coupled to the plurality of sensors and configured to receive sensor data from each of the plurality of sensors; wherein the processing unit is further configured to compare rates of change between sensor data for each individual sensor of the plurality of sensors and each of the other individual sensors of the plurality of sensors; wherein the processing unit is further configured to perform a first action when the rate of change of each of the plurality of sensors is within a first threshold of all of the other plurality of sensors; and wherein the processing unit is further configured to perform a second action when the rate of change of at least one of the plurality of sensors is not within the first threshold of at least another of the plurality of sensors.

Abstract: Improved techniques and systems are disclosed for determining the components of resistance experienced by a wearer of a wearable device engaged in an activity such as bicycling or running. By monitoring data using the wearable device, improved estimates can be derived for various factors contributing to the resistance experienced by the user in the course of the activity. Using these improved estimates, data sampling rates may be reduced for some or all of the monitored data.

Abstract: Systems and methods for monitoring underwater structures are provided. First and second sets of point cloud data that are obtained at different times are compared to determine whether the location of the underwater structure has changed. For detecting vibration, a series of range measurements taken along a line intersecting the underwater structure are compared to one another to determine an amplitude and frequency of any vibration present in the underwater structure. For detecting temperature, the ratio of different components of return signals obtained from a point in the water surrounding the underwater structure is measured to derive the temperature of the water. Leak detection can be performed by scanning areas around the underwater structure. Monitoring systems can include a primary receiver for range measurements, and first and second temperature channel receivers for temperature measurements.

Abstract: A battery state detection device detects a battery state and includes: a first permissible current calculating unit configured to calculate a first permissible current of a battery based on a voltage of the battery detected by a voltage detecting unit; a second permissible current calculating unit configured to calculate a second permissible current of the battery without using the voltage of the battery; and a permissible current determining unit configured to determine a permissible current of the battery corresponding to the battery state on the basis of at least one of the first permissible current and the second permissible current.

Abstract: The invention relates to a method (100) for monitoring the accuracy of the azimuthal orientation of a handheld optoelectronic measuring device to be determined (110) by means of an electronic magnetic compass, including an automatic ascertainment (120) of an estimated accuracy value by the measuring device based on measured data of the magnetic compass, characterized by a safety check (200), within the scope of which a probability that the estimated accuracy value meets a previously determined (140) accuracy criterion is automatically ascertained (220) by the measuring device, and the ascertained probability is provided (230) to a user as a return value. The invention also relates to a handheld optoelectronic measuring device including an electronic magnetic compass for carrying out the method according to the invention.

Abstract: A surveillance platform for the sensing, measuring, monitoring and controlling equipment and environments, such as food storage and retailing environments, data center environments, and other environments in which equipment performance, operating status, and environmental condition monitoring is desirable, is provided. The surveillance platform can facilitate reporting, visualizing, acknowledging, analyzing, calculating, event generating, notifying, trending, and tracking, of operational events occurring within the environment. Such techniques can be used to protect articles such as food articles, medical articles, computing devices and equipment, artifacts, documents, and the like.

Abstract: A system for determining an orientation of a first device relative to a user includes a first device including a first orientation measuring unit configured to measure an orientation of the first device relative to the earth, a second device configured to be worn by the user on a body part. The second device includes a second orientation measuring unit configured to measure an orientation of the second device relative to the earth. The system also has a processor configured to calculate an orientation of the first device relative to the second device by comparing the measured orientation of the first device relative to the earth with the measured orientation of the second device relative to the earth.

Abstract: A sensor information processing apparatus according to an embodiment of the present invention includes: an obtainment unit configured to obtain sensor information indicating a result of measurement performed by a sensor; a display control unit configured to perform control of displaying on a screen an icon indicating the sensor; and a determination unit configured to determine presence/absence of abnormality regarding the sensor information obtained by the obtainment unit, wherein in a state where the display control unit is performing control of selectively displaying on the screen the icon of the sensor having been designated, and when abnormality has been determined by the determination unit, the display control unit performs control of displaying on the screen a target icon irrespectively of presence/absence of designation thereof, the target icon being an icon of a sensor that corresponds to the sensor information for which abnormality has been determined.

Abstract: Improved techniques and systems are disclosed for determining the components of resistance experienced by a wearer of a wearable device engaged in an activity such as bicycling or running. By monitoring data using the wearable device, improved estimates can be derived for various factors contributing to the resistance experienced by the user in the course of the activity. Using these improved estimates, data sampling rates may be reduced for some or all of the monitored data.

Abstract: Seismic data processing using one or more non-linear stacking enabling detection of weak signals relative to noise levels. The non-linear stacking includes a double phase, a double phase-weighted, a real phasor, a squared real phasor, a phase and an N-th root stack. Microseismic signals as recorded by one or more seismic detectors and transformed by transforming the signal to enhance detection of arrivals. The transforms enable the generation of an image, or map, representative of the likelihood that there was a source of seismic energy occurring at a given point in time at a particular point in space, which may be used, for example, in monitoring operations such as hydraulic fracturing, fluid production, water flooding, steam flooding, gas flooding, and formation compaction.

Abstract: Methods and systems for status determination are disclosed. Operational status of a node can be considered based on operational rates of a plurality of nodes in a system. An example method can comprise determining a first operational rate of a first node and determining a second operational rate of a second node. A difference between the first operational rate and the second operational rate can be analyzed. For example, the difference can be compared to a threshold to determine an operational status of the first node. If the difference is above the threshold, the operational status can be given a first value, but if the difference is below the threshold, the operational status can be given a second value. The operational status can be sent to a load balancer.

Abstract: Methods and apparatus for obtaining an indication of fluid inflow in a section of a gas well having multiple perforations through which fluids comprising gas and/or liquid enter the well are described. In an example, the temperature within the section of the gas well is monitored at a plurality of locations. The locations comprising (a) a first set of locations, at or near a perforation; and (b) a second set of locations at which the temperature is substantially independent of the effects of the inflow of gas at a perforation. An indication of temperature excursions at the locations is obtained and used to obtaining an indication of the inflow of fluids to the well by relating the indications of temperature excursions from the second set of locations to liquid inflow and relating the indications of temperature excursions from the first set of locations to liquid and gas inflow.

Abstract: Methods and systems are provided for adjusting sensitivity of detectors in a nuclear medicine imaging system based on a sensitivity table. In one embodiment, a method comprises acquiring, with a detector including a collimator, scan data of a subject administered with a radioisotope; calculating a sensitivity of the detector based on the collimator and the radioisotope; and calculating a quantitative parameter from the acquired scan data of the subject based on the calculated sensitivity. In this way, SPECT quantitation may be accurately performed due to the increased accuracy of detector sensitivity for a given collimator and radioisotope without specifically calibrating the detector for the given collimator and radioisotope.

Abstract: The present invention provides a method for simulating magnetic flux leakage based on loop current, the magnetic distribution of a single loop current is obtained by solid angle, then the magnetic field distribution of a semi-infinite solenoid is obtained based on the assumption of arrangement of loop currents in the magnetized specimen, and its equation is given; and the JA hysteresis model is introduced to obtain the distribution of quasi-static magnetic flux leakage field, on the basis of analyzing the relation between the distribution of a loop current on the surface of the defect and the excitation magnetic field, the distribution of quasi-static magnetic flux leakage field is obtained based on the semi-infinite solenoid.

Abstract: A portable terminal device provided with: a gyro sensor measuring an angular velocity to acquire angular velocity information; an acceleration sensor measuring an acceleration to acquire acceleration information; a camera capturing an image of a subject in surroundings to acquire image information; a vector calculation unit calculating a motion vector of the subject based on the image information; a correlation decision unit deciding a relative relation between a traveling direction by a walking motion of the user and an image-capturing direction of the camera in accordance with the angular velocity information and the acceleration information; a rectilinear walking decision unit deciding whether the user is in a rectilinear state in accordance with the calculated motion vector of the subject and correlation decision information; and a correction unit correcting the angular velocity information acquired by the gyro sensor in response to decision that the user is in the rectilinear state.

Abstract: A method includes receiving location data of a monitoring device when carried by a user and receiving motion data of the monitoring device. The motion data is associated with a time of occurrence and the location data. The method includes processing the received motion data to identify a group of the motion data having a substantially common characteristic and processing the location data for the group of the motion data. The group of motion data by way of processing the location data provides an activity identifier. The motion data includes metric data that identifies characteristics of the motion data. The method includes transferring the activity identifier and the characteristics of the motion data to a screen of a device for display. The activity identifier being a graphical user interface that receives an input for rendering more or less of the characteristics of the motion data.

Abstract: An ultrasound flaw detection device which detects abnormalities within a tube while moving in the tube by pressure of water flow. The ultrasound flaw detector includes an ultrasound probe (11) which emits an ultrasound wave from an inside of the tube to a tube wall and receives an echo signal, a pulser-receiver (12) which transmits a pulse signal to the ultrasound probe and to which the received echo signal is inputted, a memory unit (14) which stores the received echo signal, a control unit (15) which controls transmitting timing of the pulse signal from the pulser-receiver to the ultrasound probe and controls writing of the received echo signal to the memory unit, and a power supply unit (19); a flexible member (25) which connects the plurality of parts of the ultrasound flaw detector; and a centering member (26) which keeps the ultrasound probe approximately centered within the tube.