34 results about "Baseline shift" patented technology

The exposure system of the present invention inhibits baseline shift by carrying out temperature control as required by each composite equipment. This exposure system has a first control system that that sets the temperature of a first liquid, and controls the temperature of an object by circulating the first liquid for which the temperature has been set through at least one object of a projection optics and a substrate stage, and a second control system that sets the temperature of a second liquid independent from the first control system, and controls the temperature of a reticle stage by circulating the second liquid for which the temperature has been set through the reticle stage. The first and second control systems have mutually different setting capacities with respect to the size of the temperature range when setting the temperatures of the liquids.

A method to determine eccentricity of a rotor in a turbine including: collecting sensor data of rotor eccentricity for a plurality of startup operations; establishing a baseline eccentricity value using the sensor data corresponding to a selected startup operation; determining an eccentricity value using the filtered sensor data for each of a plurality of startup operations subsequent to the selected startup operation; determining a rotor eccentricity difference between the baseline eccentricity value and each of the eccentricity values for the plurality of startup operations subsequent to the selected startup operation, and reporting a rotor eccentricity condition based on the rotor eccentricity difference.

The invention relates to a detection device (6) for detecting photons emitted by a radiation source (2). A signal generation unit (20) generates a detection signal indicative of the energy of a detected photon while photons strike the detection device (6), and a baseline signal, which is affected by photons that previously struck the detection device (6), while photons are prevented from striking the detection device (6). A baseline shift determination unit (40) determines a baseline shift of the detection signal depending on the baseline signal. An energy determination unit (30) determines the energy of a detected photon depending on the detection signal and the determined baseline shift. Since the baseline shift of the detection signal is determined from a baseline signal that is generated while photons are prevented from striking the detection device (6), the baseline shift can be determined with higher accuracy, resulting in an improved energy determination.

A method for automatically characterizing non-linearities of a perpendicular read-back signal of a recording system is disclosed. The method includes using dibit extraction to obtain a read-back signal having a main pulse and a plurality of echoes where the read-back signal exhibits a baseline shift. An area under the first echo is integrated to obtain a first area where the integrating subtracts any baseline shift area within the first echo and where the first echo is associated with a first non-linearity. The method integrates an area of the read-back signal under the main pulse to obtain a second area where the integrating subtracts any baseline shift area within the main pulse. A first parameter is computed that characterizes the first non-linearity based on the first area and the second area. The method may be applied to characterize several non-linearities.

The invention relates to a time-frequency-transformation-based blind extraction method of fetal electrocardiography, which is based on the characteristic that the time domain of an original signal is relatively sparse. The method comprises the following steps: extracting a plurality of paths of mother-fetal mixed electrocardiosignals from different parts of mother's abdomen, and preprocessing thecollected mixed signal, wherein the preprocessing comprises the steps of correcting the baseline shift of the signals, filtering off 50Hz power frequency interference, filtering off high-frequency noise interference such as myoelectricity and the like; selecting two paths of the mother-fetus mixed electrocardiosignals according to the maximal signal-to-noise ratio and separately searching mother-fetal electrocardio wave group positions of the two paths of mixed signals with an R-wave positioning technology to obtain time intervals in which the mother-fetus electrocardio in the two paths of mixed signals are relatively sparse, converting the obtained relatively sparse time intervals into a time frequency domain by using a fuzzy function, calculating signal items and cross items in each time frequency distribution, constructing a comparison function by using generalized Rayleigh's quotient, and finally separating fetal electrocardiosignals from the two paths of mother-fetal mixed electrocardiosignals. The method provided by the invention is tested on the basis of actual collected data, and can well separate fetal electrocardiosignals.

A method to determine eccentricity of a rotor in a turbine including: collecting sensor data of rotor eccentricity for a plurality of startup operations; establishing a baseline eccentricity value using the sensor data corresponding to a selected startup operation; determining an eccentricity value using the filtered sensor data for each of a plurality of startup operations subsequent to the selected startup operation; determining a rotor eccentricity difference between the baseline eccentricity value and each of the eccentricity values for the plurality of startup operations subsequent to the selected startup operation, and reporting a rotor eccentricity condition based on the rotor eccentricity difference.

The invention relates to a detection device (6) for detecting photons emitted by a radiation source (2). A signal generation unit (20) generates a detection signal indicative of the energy of a detected photon while photons strike the detection device (6), and a baseline signal, which is affected by photons that previously struck the detection device (6), while photons are prevented from striking the detection device (6). A baseline shift determination unit (40) determines a baseline shift of the detection signal depending on the baseline signal. An energy determination unit (30) determines the energy of a detected photon depending on the detection signal and the determined baseline shift. Since the baseline shift of the detection signal is determined from a baseline signal that is generated while photons are prevented from striking the detection device (6), the baseline shift can be determined with higher accuracy, resulting in an improved energy determination.

Provided is a differential type reproduction head which can obtain a preferable bit error rate without causing a baseline shift even when two magnetoresistive elements have different maximum resistance change amounts. The differential type reproduction head has a layered structure formed by a first magnetoresistive element having a first free layer, a differential gap layer, and a second magnetoresistive element having a second free layer. When DR1 and DR2 are the maximum resistance change amounts of the first magnetoresistive element and the second magnetoresistive element, respectively, HB1 is a magnetic domain control field applied to the first free layer, and HB2 is a magnetic domain control field applied to the second free layer, the following relationships are satisfied: HB1>HB2 when DR1>DR2; HB2>HB1 when DR2>DR1.

A method for automatically characterizing non-linearities of a perpendicular read-back signal of a recording system is disclosed. The method includes using dibit extraction to obtain a read-back signal having a main pulse and a plurality of echoes where the read-back signal exhibits a baseline shift. An area under the first echo is integrated to obtain a first area where the integrating subtracts any baseline shift area within the first echo and where the first echo is associated with a first non-linearity. The method integrates an area of the read-back signal under the main pulse to obtain a second area where the integrating subtracts any baseline shift area within the main pulse. A first parameter is computed that characterizes the first non-linearity based on the first area and the second area. The method may be applied to characterize several non-linearities.

The invention discloses a nuclear magnetic resonance T2 spectrum inversion method considering baseline shifting under the low signal-to-noise ratio. Firstly filtering processing is performed on data by using a singular value decomposition (SVD) filtering method; then the area of the non-zero value of a target T2 spectrum is obtained by using an improved orthogonal matching pursuit (OMP) algorithm; and finally the target T2 spectrum is obtained in the determined non-zero value area by using an improved singular value decomposition (SVD) algorithm considering baseline shifting. The data are processed by introducing the SVD filtering method and the singular value decomposition algorithm considering baseline shifting so that the influence of noise and baseline shifting on the result can be reduced to a great extent and the computational accuracy of the algorithm can be enhanced.

Disclosed is a recognition method of R waves of electrocardiosignals. By smoothing the electrocardiosignals, high-frequency noise burrs and baseline shift are removed, the wave crest is recognized based on the change of the slope of sampling points, the heights of a rising edge and a falling edge which correspond to the wave crest are calculated, and the R waves can be well recognized based on theaverage height accumulation amount of the wave crest within a first distance range and the magnitude of the first wave crest of intermediate waves within the first distance range; moreover, the electrocardiosignals can be utilized according to the features of the R waves, an algorithm is simple, the influence of baseline drift on the result cannot be caused, and thus the result is more accurate;meanwhile, there is no need to set a threshold value in advance according to personal conditions, and the universality is better.

The invention relates to a time-frequency-transformation-based blind extraction method of fetal electrocardiography, which is based on the characteristic that the time domain of an original signal is relatively sparse. The method comprises the following steps: extracting a plurality of paths of mother-fetal mixed electrocardiosignals from different parts of mother's abdomen, and preprocessing thecollected mixed signal, wherein the preprocessing comprises the steps of correcting the baseline shift of the signals, filtering off 50Hz power frequency interference, filtering off high-frequency noise interference such as myoelectricity and the like; selecting two paths of the mother-fetus mixed electrocardiosignals according to the maximal signal-to-noise ratio and separately searching mother-fetal electrocardio wave group positions of the two paths of mixed signals with an R-wave positioning technology to obtain time intervals in which the mother-fetus electrocardio in the two paths of mixed signals are relatively sparse, converting the obtained relatively sparse time intervals into a time frequency domain by using a fuzzy function, calculating signal items and cross items in each time frequency distribution, constructing a comparison function by using generalized Rayleigh's quotient, and finally separating fetal electrocardiosignals from the two paths of mother-fetal mixed electrocardiosignals. The method provided by the invention is tested on the basis of actual collected data, and can well separate fetal electrocardiosignals.

The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device that comprises a first shield, a first spin hall layer, a first free layer, a gap layer, a second spin hall layer, a second free layer, and a second shield. The gap layer functions as an electrode and is disposed between the first spin hall layer and the second spin hall layer. Electrical lead connections are located about the first spin hall layer, the second spin hall layer, the gap layer, the first shield, and / or the second shield. The electrical lead connections facilitate the flow of current and / or voltage from a negative lead to a positive lead. The positioning of the electrical lead connections and the positioning of the SOT differential layers improves reader resolution without decreasing the shield-to-shield spacing (i.e., read-gap).

The present invention relates to determining baseline shift of an electrical signal generated by a photon detector (102) of an X-ray examination device (101). For this purpose, the photon detector comprises a processing unit (103) that is configured to determine a first crossing frequency of a first pulse height threshold by the electrical signal generated by the photon detector. The first pulse height threshold is located at a first edge of a noise peak in the pulse height spectrum of the electrical signal.

The invention relates to radiation detection with a directly converting semiconductor layer for converting an incident radiation into electrical signals. Sub-band infra-red (IR) irradiation considerably reduces polarization in the directly converting semi-conductor material when irradiated, so that counting is possible at higher tube currents without any baseline shift. An IR irradiation device is integrated into the readout circuit to which the crystal is flip-chip bonded in order to enable 4-side-buttable crystals.

The invention provides a method for recognizing intracranial pressure signal characteristic peaks. The method conducts comprehensive analysis in combination with the waveform profile of intracranial pressure, adopts a logistic polar distribution model, and uses point-to-point difference vector as a basic characteristic with translation and rotation invariance, so that the method can overcome the impact of intracranial pressure signals on baseline shift, is sensitive to the morphological characteristic of the adjacent waveform and can capture the overall profile information of the waveform, soas to improve the anti-interference capability of characteristic peak recognition as a whole; and during recognition, the characteristic peak in the average value signal of to-be-detected cadence signals is firstly recognized and then combined into a template database to improve recognition accuracy, and the chi-square statistical test with the advantages of strong robustness and high accuracy isused as a matching means to improve the overall robustness and recognition accuracy of the method. The method provided by the invention realizes computerized recognition of intracranial pressure signal characteristic peaks, and has wide application prospects.

The invention relates to radiation detection with a directly converting semiconductor layer for converting an incident radiation into electrical signals. Sub-band infra-red (IR) irradiation considerably reduces polarization in the directly converting semi-conductor material when irradiated, so that counting is possible at higher tube currents without any baseline shift. An IR irradiation device is integrated into the readout circuit to which the crystal is flip-chip bonded in order to enable 4-side-buttable crystals.

The invention discloses a platinized zinc tungstate nano material and application thereof in the gas-sensing field. The platinized zinc tungstate nano material comprises a zinc tungstate nano material and a platinum layer loaded on a partial surface of the zinc tungstate nano material, wherein the zinc tungstate nano material is a zinc tungstate nano rod or a zinc tungstate nano particle, and the mole ratio of metal platinum and zinc tungstate is (15-20):1. At room temperature, when hydrogen concentration is 1-4%, the sensitivity range of the platinized zinc tungstate nano rod is 9.3-13, and when the hydrogen concentration is 2-4%, the sensitivity range of the platinized zinc tungstate nano particle is 3-5.8. The prepared platinized zinc tungstate nano material is uniform in dispersion and small in size, sensitivity of the zinc tungstate nano material in hydrogen can be improved after the zinc tungstate nano material is platinized, and the ambient humidity influence is eliminated to prevent baseline shift.

A wearable cardioverter defibrillator system includes a support structure that a patient can wear. The system also includes electrodes that contact the patient, and define two or more channels from which ECG signals are sensed. A processor may evaluate the channels by analyzing their respective ECG signals, to determine which contains less noise than the other(s). The analysis can be by extracting statistics from the ECG signals, optionally after first processing them, and then by comparing these statistics. These statistics may include tall peak counts, amplitudes of peaks compared to historical peak amplitudes, signal baseline shift, dwell time near a baseline, narrow peak counts, zero crossings counts, determined heart rates, and so on. Once the less noisy signal is identified, its channel can be followed preferentially or to the exclusion of other channels, for continuing monitoring and / or determining whether to shock the patient.

The invention discloses a method and a system for performing real-time cardiac monitoring by using a wearable electrocardiogram device. The method comprises the following steps: obtaining electrocardiogram data through a wearable device system, performing noise filtering, and obtaining a baseline shift-removed electrocardiogram; extracting the characteristics according to the baseline shift-removed electrocardiogram, and performing normalized classification to obtain a characteristic category; analyzing the obtained characteristic category, and taking corresponding measures according to the waveform generation situation. By implementing the embodiment of the invention, the cardiac health situation of patients whose cardiac health conditions are difficult to know and who are difficult to rescue in emergency situations can be easily monitored by a simple operation method; by using a mobile APP, two levels of danger warnings are established, the first level of danger warning helps the patients learn of cardiac discomfort and the second level of danger warning alerts emergency contacts that the patients are in an unexpectedly dangerous condition.

A method of using a sequencing cell includes applying voltage across the sequencing cell, acquiring one or more signal values from the sequencing cell, and acquiring one or more correlated signal values that are correlated with respective values of the plurality of acquired signal values thereby forming a plurality of two-dimensional data points. The plurality of two-dimensional data points comprise values in a first dimension that equal the plurality of acquired signal value and values in a second dimension that equal the plurality of correlated signal values. The method can further include computing a plurality of transformed signal values by applying a two-dimensional transformation to the plurality of two-dimensional data points.

The invention relates to the technical field of digital electrocardiogram, in particular to a digital electrocardiogram acquisition method which includes the steps: acquiring electrocardiogram data; performing filtering processing on electrocardiogram data according to an electrocardiogram data filtering algorithm to filtered electrocardiogram data; performing dryness and baseline shift removing processing on the filtered electrocardiogram data to obtain electrocardiogram waveform data; transmitting the electrocardiogram waveform data to an upper computer to display the electrocardiogram waveform data. The invention further discloses a digital electrocardiogram acquisition device and a digital electrocardiogram acquisition system. According to the digital electrocardiogram acquisition method, remote electrocardiogram data are acquired, so that the electrocardiogram diagnosis quality of a lower-level medical institution can be controlled by an upper-level medical institution.

The invention relates to a compensation method of waveform pulse non-linear distortion in multi-component infrared smoke analyzer, which comprises setting an initial weight value (1) of object pulse, using test to record the non-linear distortion of the waveform (2), calculating out one correct weight value (3), calculating if the distortion corrected via the correct weight value reaches demand, or else modifying the initial weight value (4). The invention has the advantages that sine the positive and negative values of each pulse are set with different weight values and checked without peak value but with pulse envelope integral that calculates out the integral phase and the weight values of the pulse positive and negative values, the invention can hold the integral value in the envelope line when each pulse shifts, to eliminate baseline shift effect on each pulse and only present the reflection on relative signal.

The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device that comprises a first shield, a first spin hall layer, a first free layer, a gap layer, a second spin hall layer, a second free layer, and a second shield. The gap layer functions as an electrode and is disposed between the first spin hall layer and the second spin hall layer. Electrical lead connections are located about the first spin hall layer, the second spin hall layer, the gap layer, the first shield, and / or the second shield. The electrical lead connections facilitate the flow of current and / or voltage from a negative lead to a positive lead. The positioning of the electrical lead connections and the positioning of the SOT differential layers improves reader resolution without decreasing the shield-to-shield spacing (i.e., read-gap).

The invention discloses a self-adapting compensation detection method for baseline shift of combustible gas detector, belonging to the gas detection technical field, suitable for baseline shift compensation of combustible gas detector and long-time monitoring the outburst combustible gas leakage accident. The baseline shift is as the general problem of the gas sensor and the baseline shift speed due to the environment factor and the slow change of the gas sensor is far less than the change speed of the gas leakage signal. A gas detector control center in the invention presets a changed speed threshold and the concentration alarming threshold; the baseline shift signal and the combustible gas leakage response signal are differentiated by the change speed of the initial gas concentration signal G of the gas sensor; and the gas concentration T and the baseline B are calculated after self-adapting compensation of the baseline shift; and the alarm signal E1 and the severe shift alarm signal E2 are generated based on T and B. The combustible gas detector can automatically judge the baseline shift and the user is reminded of timely calibrating or exchanging the gas sensor.

Methods for terminating fibrillation in a fibrillating heart employing nanosecond pulsed electric fields (nsPEFs) are disclosed. nsPEF defibrillation demonstrates its effectiveness as a new defibrillation modality, achieving reliable defibrillation with energies that are an order of magnitude lower than those needed for conventional defibrillation (millisecond shocks with mono- and bi-phasic waveforms). Tests did not reveal any negative effect of nsPEF defibrillation on cardiac tissue, in particular, cardiac tissue treated with nsPEFs does not exhibit a baseline shift in the optical transmembrane potential signal (distinctive feature that indicates electroporation), or changes in action potential duration or shape. The mechanism of nsPEF defibrillation is likely different from conventional defibrillation since it does not rely on membrane charging but on the basis of displacement currents that flow within nanoseconds after the shock is applied. nsPEFs provide the technology for the next generation of defibrillators that help emergency medical services to treat patients effectively.

A method and system for correcting a baseline of a digitized scintillation pulse. In the method, firstly performing time axial sampling on scintillation pulse signals using a multi-threshold voltage sampling method to obtain time-threshold sampling points of a scintillation pulse waveform; then selecting these time-threshold sampling points, reconstructing a pulse waveform and identifying a model parameter using a shape characteristic of the scintillation pulse, and estimating a baseline shift mean value of the scintillation pulse according thereto; and finally correcting the baseline of the scintillation pulse waveform according to the baseline shift mean value. Also disclosed is a system for correcting a baseline of a digitized scintillation pulse, comprising a digital sampling module, a baseline offset calculation module and a baseline correction module. The present invention can effectively and accurately screen the baseline drift of a scintillation pulse, realizing rapid and real-time self-adaptive correction of a baseline, and improving the signal-to-noise ratio of a scintillation pulse data measurement result and the stability of a data acquisition system.

A method of using a sequencing cell (300) includes applying an alternating voltage (328) across the sequencing cell while sequencing a nucleic acid (332), acquiring a plurality of signal values (P(ti)) from the sequencing cell while a tag molecule (338) is threaded in a nano pore (316) of the sequencing cell, and acquiring a plurality of correlated signal values (X(ti)) that are correlated with respective values of the plurality of acquired signal values (P(ti)) thereby forming a plurality of two-dimensional data points (1201, 1203, 1205, 1207, 1209, 1303, 1305, 1307, 1309, 1311). The two-dimensional data points comprise a first dimension for the acquired signal values and a second dimension for the correlated signal values. The method further includes computing a plurality of transformedsignal values by applying a two-dimensional transformation to the two-dimensional data points.

The invention discloses a platinized zinc tungstate nano material and application thereof in the gas-sensing field. The platinized zinc tungstate nano material comprises a zinc tungstate nano material and a platinum layer loaded on a partial surface of the zinc tungstate nano material, wherein the zinc tungstate nano material is a zinc tungstate nano rod or a zinc tungstate nano particle, and the mole ratio of metal platinum and zinc tungstate is (15-20):1. At room temperature, when hydrogen concentration is 1-4%, the sensitivity range of the platinized zinc tungstate nano rod is 9.3-13, and when the hydrogen concentration is 2-4%, the sensitivity range of the platinized zinc tungstate nano particle is 3-5.8. The prepared platinized zinc tungstate nano material is uniform in dispersion and small in size, sensitivity of the zinc tungstate nano material in hydrogen can be improved after the zinc tungstate nano material is platinized, and the ambient humidity influence is eliminated to prevent baseline shift.