Abstract: A method of estimating background radiation in spectral data. The method may comprise, iteratively, fitting an analytical curve, such as a spline curve, to reference data, determining an allowable deviation of the reference data from the analytical curve and clipping data points of the reference data or the spectral data that are more than the allowable deviation above the analytical curve to provide the reference data for the next iteration until termination criterion is met. The reference data is initially based upon the spectral data. The method may comprise generating estimates of background radiation of the spectral data, each estimate based upon fitting a different order polynomial to the spectral data, and selecting an order of polynomial to use for estimating background radiation and/or one of the estimates of the background radiation. The method may further comprise estimating the noise in the spectral data from the reference data.

Abstract: A multi-node synchronous on-site test method, the method comprising: using GPS time as time reference, and conducting synchronous on-site tests on the devices to be tested and systems distributed at different places at an appointed time; controlling the synchronous phase control simulation devices distributed at multiple nodes via a synchronous test control center; within a uniform time section, synchronously outputting secondary side AC simulation signals, and simulating various actual operating conditions, thus achieving the detection of the monitoring and control performances of various dynamic monitoring and control systems, and ensuring the normal functions of the systems. The method of the present invention is able to conduct multi-node dynamic simulation test with synchronized GPS time, and achieves the detection of large-area multi-node monitoring and control systems.

Abstract: A method of estimating lateral positioning uncertainties of a seismic image is performed at a computer system. The computer system receives a velocity model, the velocity model including a plurality of base velocity values used for generating the seismic image, each base velocity value having a low limit and a high limit. The computer system derives a plurality of lateral velocity gradient uncertainties from the velocity model and generates multiple lateral velocity gradient profiles, each lateral velocity gradient profile including a random realization of the plurality of lateral velocity gradient uncertainties. The computer system calculates perturbation raypaths originating from a surface point of the seismic image based on the velocity model and the multiple lateral velocity gradient profiles and estimates a lateral positioning uncertainty for a target location at a predefined depth of the seismic image based on lateral distributions of the perturbation raypaths at the predefined depth.

Abstract: In one embodiment, an integrated circuit is disclosed. The integrated includes a general purpose processor, an interface circuit, and a calibration adapter circuit. The general purpose processor circuit generates calibration test inputs based on user instruction. The analog interface circuit may include a calibration bus circuit. The calibration bus circuit may receive the calibration test input from the general purpose processor circuit. The calibration adapter circuit is coupled to the calibration bus circuit and the general purpose processor circuit and transmits the calibration test inputs to the calibration bus circuit.

Abstract: Operational parameters of a single-photon detector are determined with a continuous wave laser source. At a fixed trigger, a dark count probability and a series of count probabilities at different optical powers are determined. A particular optical power is selected by using a wide-range variable attenuator to attenuate the optical power of the continuous wave laser. The dark count probability and the count probabilities are determined for different trigger rates. The operational parameters include efficiency, afterpulsing constant, and detrap time. The operational parameters are computed by fitting the computed dark count probabilities and count probabilities to a user-defined relationship.

Abstract: Disclosed herein are various embodiments of methods and systems for optimizing the analysis of the source locations of microseismic sources, comprising recording microseismic data using patches of sensors. Each patch contains multiple sensors, arranged as a grid or a line segment. This approach uses fewer sensors and can cover a larger area than previous techniques for acquiring microseismic data. The data recorded in this way can be filtered using directional filters, such that each patch may be targeted at a specific point in the subsurface. The microseismic source-scanning algorithm benefits from having data filtered to include directional signals only from pairs of patch locations and subsurface locations. This produces an improved estimate of the locations of microseismic events. The patches may be disposed about a horizontal well bore, and aligned such that directional filtering enhances data from hydraulic fracturing operations in the wellbore.

Abstract: Systems and methods for detecting the failure of a precision time source using an independent time source are disclosed. Additionally, detecting the failure of a GNSS based precision time source based on a calculated location of a GNSS receiver is disclosed. Moreover, the system may be further configured to distribute a time derived from the precision time source as a precision time reference to time dependent devices. In the event of a failure of the precision time source, the system may be configured to distribute a time derived from a second precision time source as the precision time signal during a holdover period.

Abstract: A system and method of adjusting a zero reference may comprise retracting ram of an actuator coupled to a load cell from a first position to a second position. The system and method may comprise reporting a measurement by a load cell, in response to the actuator being in a second position. The system and method may comprise calculating a force being measured by t the load cell. The system and method may comprise creating a zero reference offset value based on the calculation, in response to the force calculation resulting in a non-zero force calculation. The system and method may comprise adjusting a zero reference value of the load cell by the zero reference offset value.

Abstract: Improved gas leak detection from moving platforms is provided. Automatic horizontal spatial scale analysis can be performed in order to distinguish a leak from background levels of the measured gas. Source identification can be provided by using isotopic ratios and/or chemical tracers to distinguish gas leaks from other sources of the measured gas. Multi-point measurements combined with spatial analysis of the multi-point measurement results can provide leak source distance estimates. Qualitative source identification is provided. These methods can be practiced individually or in any combination.

Abstract: Electrical usage of devices in a building may be monitored to provide information about the operation of the devices to a user. The information communicated to a user may include historical information and real-time information. In determining the real-time information, it may be desired to provide the information quickly and use a smaller set of features that are available more quickly. In determining the historical information, it may be desired to provide more accurate information and use a larger set of features. A device may compute real-time information and historical information using different sets of features.

Abstract: A patient monitoring device and method that determines and monitors at least one patient parameter is provided. A configuration processor generates configuration information in response to a first input signal and an adaptive notch filter receives a second input signal. The second input signal includes a signal of interest and an interference signal in a predetermined frequency range. The adaptive notch filter automatically estimates the interference signal within the second input signal based on a filter parameter and removes the estimated interference signal from the second input signal to generate a target signal. A step processor is electrically coupled between the configuration processor and the adaptive notch filter and sets a value of the filter parameter based on the configuration information, wherein the adaptive notch filter uses the filter parameter to reduce a ringing artifact on the target signal below a threshold level.

Abstract: Electronic measuring instrument equipped with a removable intelligent processing and radio communication interface. The interface allows managing additional features such as bidirectional communication of commands and measurement data with printers, computers or other external devices, as well as the transmission of instructions or measurement programs to the instrument. The radio interface may be connected with several measuring instruments such as callipers, micrometers, comparators or height gauges. It is integrated into the lid of the battery compartment of the instrument, so that it can be installed and removed easily and without impairing the seal. The cover also includes an extra battery for the processing and radio transmission interface.

Abstract: An apparatus for determining or monitoring at least one process variable, comprising: a sensor element and a measuring electronics, which form a measuring unit; and at least one control/evaluating/calculating unit arranged removed from the measuring unit; and/or an in/output unit arranged removed from the measuring unit and the control/evaluating/calculating unit. The control/evaluating/calculating unit and the in/output unit are connected with the measuring unit via a first interface and a second interface. The measuring electronics operates the sensor element and forwards the measurement signals via the interfaces to the control/evaluating/calculating unit as unprocessed, raw, measured values. The control/evaluating/calculating unit arranged removed from the measuring unit determines, improves and/or monitors the process variable based on the raw, measured values and makes such available via the in/output unit.

Abstract: A method for determining a topology information item on a low-voltage electrical distribution system. A group of at least two current measuring devices that are arranged at different points in the low-voltage distribution system is selected, and in each case the current is measured by the current measuring devices so as to form a current measurement value. The current measurement values are added so as to form a current sum taking into consideration the current flow direction. A topology information item is formed which specifies that the current measuring devices electrically isolate a load-free and source-free section of the low-voltage distribution system when the current sum, in terms of absolute value, falls below a predetermined threshold value.

Abstract: A method and apparatus for filtering pressure data from a pressure-sensitive device is disclosed. A computer implemented method for filtering pressure data from a pressure-sensitive device comprises receiving, from a pressure sensitive device, a raw pressure value for a stroke, filtering the raw pressure value for the stroke to determine a filtered pressure value, and computing a width of a stroke based on the filtered pressure value.

Abstract: An electric potential is applied to first and second electrodes on opposite sides of a gap between an electronic component and a heat spreader. At least one of a thermal interface material in the gap, the electronic component and the heat spreader is subjected to a changing physical condition. The electrical capacitance between the electrodes is monitored during the changing physical condition. Such a method can be practiced using an array of components sharing a common heat spreader. An assembly for testing thermal interfaces includes a printed circuit board, a plurality of electronic components mounted to and operatively associated with the printed circuit board, a heat spreader positioned for absorbing heat generated by the electronic components, a first electrode associated with the heat spreader, a plurality of second electrodes associated, respectively, with the electronic component, and a device for monitoring electrical capacitances between the first and second electrodes.

Abstract: An accelerometer in a mobile device is calibrated by taking multiple measurements of acceleration vectors when the mobile device is held stationary at different orientations with respect to a plane normal. A circle is calculated that fits respective tips of measured acceleration vectors in the accelerometer coordinate system. The radius of the circle and the lengths of the measured acceleration vectors are used to calculate a rotation angle for aligning the accelerometer coordinate system with the mobile device surface. A gyroscope in the mobile device is calibrated by taking multiple measurements of a rotation axis when the mobile device is rotated at different rates with respect to the rotation axis. A line is calculated that fits the measurements. The angle between the line and an axis of the gyroscope coordinate system is used to align the gyroscope coordinate system with the mobile device surface.

Abstract: A method of estimating a battery life includes: for a secondary battery having a degradation rate R when X days have elapsed after initial charge of the secondary battery, calculating a degradation estimation value (X+Y) days after the initial charge from degradation master data, the degradation master data being identified with use of conditions of temperature T provided for the calculation and a battery state S provided for the calculation; and deriving number of elapsed days Xcorr giving the degradation rate R based on the identified degradation master data, and calculating the degradation estimation value (Xcorr+Y) days after the initial charge from the identified degradation master data.

Abstract: A system and method include receiving a set of sampled measurements for each of multiple sensors, wherein the sampled measurements are at irregular intervals or different rates, re-sampling the sampled measurements of each of the multiple sensors at a higher rate than one of the sensor's set of sampled measurements, and synchronizing the sampled measurements of each of the multiple sensors.

Abstract: A mass spectrometer including an entrance slit, an energy filter, a momentum filter and a detector array, the entrance slit, energy filter and momentum filter being configured to provide molecular analyte ions to the detector array at a mass resolution of about 20,000 or greater. A method for determining the isotopic composition of an analyte in a sample includes converting the analyte to molecular analyte ions, separating the molecular analyte ions using an entrance slit, separating the molecular analyte ions according to their energy levels, separating the molecular analyte ions according to their momenta, detecting two or more of the molecular analyte ions at a mass resolution of about 20,000 or greater to produce molecular analyte ion data; and analyzing the molecular analyte data to determine the isotopic composition of at least a portion of the analyte.