36 results about "Absolute level" patented technology

The invention discloses a precise leveling system of a vibration isolation foundation bed. The lower bottom surface of the vibration isolation foundation bed is supported by air springs; a precise optical vibration isolation platform is arranged on the vibration isolation foundation bed; one or two level monitors are arranged on the precise optical vibration isolation platform for measuring an included angle between the vibration isolation platform and the absolute level in two mutually vertical directions; flexible leg monitoring devices are respectively connected with the own air springs; the output ends of the level monitors and the flexible leg monitoring devices are respectively connected with the input ends of controllers; the output ends of the controllers are connected with all control valves; an air channel port of each control valve is respectively connected with the own air spring; air supplying devices respectively supply air for each control valve. The precise leveling system realizes vibration isolation of Grade II; the vibration isolation platform has highly precise planarity and meets requirements of various precision instruments for the environment; the control valves realize the air inflow of a small amount during the charging process of the air springs, improve leveling precision and can keep the system stable. The precise leveling system is applicable to ultra precise measurement and processing.

A power management device providing a power amplifier with power supply voltage is provided. The power management unit includes a parallel-hybrid amplitude modulator apparatus having a linear part configured to track frequency components of an input signal above a determined threshold frequency and a switching part arranged in parallel with the linear part and configured to track frequency components of the input signal below the determined threshold frequency. Additionally, the power management unit includes a current sensing and controlling part configured to determine the level of a direct current component at an output of the linear part and control the switching part to produce an output signal compensating for the direct current component at the output of the linear part to decrease the absolute level of the direct current at the output of the linear part.

A casing inspection device with magnets and flux sensors. The sensors provide measurements of absolute levels of magnetic flux that are indicative of changes in casing thickness and / or permeability.

A near-infrared spectrophotometric system (e.g., a cerebral oximeter) includes a sensor portion and a monitor portion. The monitor portion includes a processor that runs an algorithm which utilizes the amount of detected light to determine the value of the oxygen concentration (e.g., the absolute level of oxygen concentration). The monitor portion also includes a visual display that displays the determined oxygen concentration values in various formats. The monitor portion may also include an audible device (e.g., a speaker), that provides audible indications of the determined oxygen concentration values. Various visual indicators may include, for example, color-coded graphs of the determined oxygenation values to alert the system user, for example, whether one hemisphere of the brain, or one or more regions of the brain, is in danger of adverse and potentially permanent damage. Also, data may be pre-processed by selecting the most clinically concerning sensor value (e.g., the sensor with the lowest value), and displaying only that sensor value and its identification on the display screen. Alternatively, an average value of multiple sensor measurements may be displayed. This reduces screen clutter and increases the speed of interpretation by the system user. Also, all sensor values may be averaged, and the average value displayed. The determined oxygenation values may also be provided in an audible format.

Up and down signal levels in a wireless base station and a forward base station can be automatically adjusted into predetermined levels respectively with a simple configuration. In an interface portion 12, a pilot signal P of a predetermined level is generated by a pilot signal generator 120, and multiplexed with a down transmission signal 111 from a wireless base station 11 by a multiplexer 121. The multiplexed signal is amplified with a constant gain by a down signal amplifier 122, then converted into a down optical signal by an electro-optic converter 123, wavelength-multiplexed by an optical multi / demultiplexer 124, sent out to an optical fiber 15, and transmitted to a forward base station 13. In the forward base station 13, the down optical signal wavelength-demultiplexed by an optical multi / demultiplexer 124 is converted into a down electric signal by an opto-electric converter 125, and the pilot signal P is demultiplexed by a demultiplexer 133. A gain control unit 130 detects an absolute level of the pilot signal P, and outputs a gain control signal G1 to set the level value at a predetermined rated value. A down signal gain variable amplifier 134 and an up signal gain variable amplifier 136 amplify the down transmission signal and the up reception signal respectively with a gain controlled by the gain control signal G1.

A near-infrared spectrophotometric system (e.g., a cerebral oximeter) includes a sensor portion and a monitor portion. The monitor portion includes a processor that runs an algorithm which utilizes the amount of detected light to determine the value of the oxygen concentration (e.g., the absolute level of oxygen concentration). The monitor portion also includes a visual display that displays the determined oxygen concentration values in various formats. The monitor portion may also include an audible device (e.g., a speaker), that provides audible indications of the determined oxygen concentration values. Various visual indicators may include, for example, color-coded graphs of the determined oxygenation values to alert the system user, for example, whether one hemisphere of the brain, or one or more regions of the brain, is in danger of adverse and potentially permanent damage. Also, data may be pre-processed by selecting the most clinically concerning sensor value (e.g., the sensor with the lowest value), and displaying only that sensor value and its identification on the display screen. Alternatively, an average value of multiple sensor measurements may be displayed. This reduces screen clutter and increases the speed of interpretation by the system user. Also, all sensor values may be averaged, and the average value displayed. The determined oxygenation values may also be provided in an audible format.

The present application discloses a tissue oximeter system which includes radio frequency (RF) wave sources configured to produce RF waves at different RF frequencies, near infrared (NIR) light sources each configured to emit NIR lights each modulated by one or more of the RF waves generated by the RF wave sources, an optical probe that directs the NIR lights modulated at different RF frequencies to a living tissue, and wherein the optical probe includes a plurality of light-emitting points that each can couple one of the NIR lights into the living tissue, one or more optical detectors that each can receive scattered lights from the living tissue and to convert the scattered lights into electronic signals, and a control and data acquisition unit that can calculate absolute level of [HbO], [Hb], or [SO2] based on the electronic signals.

In one embodiment, a method for encoding video data is provided that includes receiving a transform unit comprising a two-dimensional array of transform coefficients and processing the transform coefficients of the two-dimensional array along a single-level scan order. The processing includes selecting, for each non-zero transform coefficient along the single-level scan order, one or more context models for encoding an absolute level of the non-zero transform coefficient, where the selecting is based on one or more transform coefficients previously encoded along the single-level scan order.

The use of an optical or other measurement in a blood access system enables the determination of a fluid sample appropriate for measurement on a real time basis. This information can be used to control the blood access system and related measurement processes. The determination can be based on, for example, at least one of: optical density, optical scatter, analyte level, temperature, the absolute level of any of the preceding, the stability of any of the preceding, the rate of change of any of the preceding, or the value of any of the preceding relative to another determination. The determination can be made using, for example, at least one of: electrochemical sensor, ion specific electrode, capacitance measurement, impedance measurement, inductance measurement, conductivity measurement, optical measurement, and ultrasound measurement. The present invention relates to determination of the quality of a biological sample in which determination of an analyte concentration is to be made, and various methods and apparatuses related thereto. An evaluation of sample quality can be made by monitoring the temporal changes in the sample properties or characteristics as the biological sample is procured or measured. The methods and apparatuses described herein can be used to evaluate the temporal characteristics of a sample during sample acquisition and / or during determination of the sample analyte or parameter of interest. The sample quality assurance methods and apparatuses described herein can thus be used to ensure that a valid sample has been procured by or presented to an instrument or measurement system for analyte determination, thereby preventing the measurement and reporting of analyte values for a sample that is unstable or otherwise non-representative of the biological system from which the sample was obtained.

Micro-organisms which over-produce ATPase, especially mycoplasmas in a sample of a cell culture, are detected by making use of the ATPase activity to convert cellular or externally added ATP to ADP. The decrease in ATP externally added or the increase or absolute level of ADP produced from cellular ATP can then be detected or measured. For example, if a reagent such as phosphenol pyruvate / pyruvate kinase is added to convert that ADP back to ATP, the resulting high level of ATP can be detected bioluminescently using the reaction: Luciferin+luciferase enzyme+ATP→hv+products.

A method for selectively reducing quantization levels is adapted for use in a transcoder including a variable length decoding unit. The variable length decoding unit decodes a plurality of input variable length codes into a plurality of decoded pairs, wherein each decoded pair is a run-level pair. The method includes the following steps: (a) obtaining a plurality of absolute levels arranged in an order of scan positions according to the runs and levels of the decoded pairs; (b) determining whether a saved bit number correspondingly found by reducing each absolute level exceeds a bit number threshold value such that, if yes, the respective absolute level belongs to a target set; and (c) reducing each absolute level that belongs to the target set.

Methods and compositions are provided for diagnosing an abnormal early pregnancy in a mammalian subject by contacting a biological sample of the subject with a reagent that enables measurement of certain biomarker targets, e.g., human placental lactogen (hPL) and / or human chorionic gonadotropin (hCG). In one embodiment, the mRNA of these biomarkers is measured in a biological sample, e.g., serum. The absolute levels of mRNA or protein levels, a ratio of mRNA to protein levels, or a pattern of multiple biomarker mRNA and / or protein levels or ratios are measured and a relation to the ratio or pattern of expression levels of the same biomarkers in the same biological fluid of a reference or control female mammalian subject having a normal intrauterine pregnancy (IUP) is determined. The presence of, absence of, or changes in expression levels, ratios or patterns of the biomarker(s) in relation to those of the reference or control correlates with a diagnosis of abnormal pregnancy, i.e., miscarriage or ectopic pregnancy. Various reagents for use in kits and panels for such diagnosis include PCR primer-probe sets or ligands, labeled or immobilized, which are capable of detecting the changes in expression or translation of these biomarker targets.

A near-infrared spectrophotometric system (e.g., a cerebral oximeter) includes a sensor portion and a monitor portion. The monitor portion includes a processor that runs an algorithm which utilizes the amount of detected light to determine the value of the oxygen concentration (e.g., the absolute level of oxygen concentration). The monitor portion also includes a visual display that displays the determined oxygen concentration values in various formats. The monitor portion may also include an audible device (e.g., a speaker), that provides audible indications of the determined oxygen concentration values. Various visual indicators may include, for example, color-coded graphs of the determined oxygenation values to alert the system user, for example, whether one hemisphere of the brain, or one or more regions of the brain, is in danger of adverse and potentially permanent damage. Also, data may be pre-processed by selecting the most clinically concerning sensor value (e.g., the sensor with the lowest value), and displaying only that sensor value and its identification on the display screen. Alternatively, an average value of multiple sensor measurements may be displayed. This reduces screen clutter and increases the speed of interpretation by the system user. Also, all sensor values may be averaged, and the average value displayed. The determined oxygenation values may also be provided in an audible format.

A method for data analysis of power modeling for a microprocessor has been developed. The method takes multiple values of power data from a power modeling simulator and generates summary data to characterize the power data behavior. Summary data views include results characterizing behavior in a single cycle and behavior across multiple cycles. Data is viewed both at an absolute level to characterize total power and relative to previous levels to characterize power derivatives. Summary data is derived from power generated every cycle when running specific benchmark programs on the power simulator.

The invention provides a real-time high-precision measuring method for relative and absolute horizon reference swaying quantity of a platform. The method is as follows: a high resolution camera fixed in inertial space is used for simultaneous imaging of an absolute horizon reference and a cooperation sign on an unstable platform; pose relationship between a relative horizon reference and an absolute horizon reference of a coordinate system of the cooperation sign on the unstable platform is obtained by using pose estimation algorithm; since the cooperation sign and the unstable platform are in fixed connection, pose parameters of relative and absolute horizon references of the unstable platform can be determined therefrom.

The invention provides a real-time high-precision measurement method for absolute swaying quantity of an unstable platform. According to the method, a camera is installed on the unstable platform; the camera moves as the platform sways and carries out imaging on a spatial plane target plate; then pose estimation algorithm is utilized for calculation of an altitude angle and an azimuth angle of the camera relative to an initial absolute reference state at the moment; since the unstable platform and the camera are in fixed connection, pose parameters of the unstable platform can be determined therefrom. The measurement method provided by the invention highly precisely determines pose swaying quantity of the unstable platform in real time by using a photogrammetric technology, and precision of an angle reaches 10 second of arc; the method overcomes engineering problems in high precision determination of absolute horizon reference by using a photogrammetric method; and the method can realize error compensation and correction of pose swaying quantity of the unstable platform under the condition of simplified configuration.

The present invention provides a light emitting device driver circuit and a control circuit and a control method thereof. The light emitting device driver circuit is used for driving a light emitting device circuit according to a rectified dimming signal. The light emitting device driver circuit includes a power stage circuit and a control circuit. The control circuit includes a pulse width modulation (PWM) circuit, a current limit (CL) circuit, and a determination circuit. The CL circuit generates a CL signal according to a current sense signal and a predetermined CL threshold. The determination circuit is coupled to the PWM circuit and the CL circuit, for generating an operation signal according to a PWM signal and the CL signal. The power stage circuit maintains an absolute level of an AC dimming current not lower than a holding current in an ON phase period.

The invention discloses an amplitude test method of a water lubrication rubber tail bearing based on a machine vision technology. The amplitude test method comprises the steps of: 1) measuring maximum vibration frequency of the water lubrication rubber tail bearing, determining the shoot frame number of a high speed camera according to the maximum vibration frequency, 2) taking a lath and a bearing backing at a corresponding part from the water lubrication rubber tail bearing as a test block, 3) marking a test track point on the side face, perpendicular to an axis of a test shaft, of the lath of the test block, 4) pressing the test block on the test shaft by pressure p, 5) starting the test shaft at a rotating speed n, 6) acquiring a vibration image sequence of the test block by the high speed camera, and 7) identifying an absolute level amplitude and an absolute vertical amplitude of the test track point according to the vibration image sequence. The method employs the technical scheme that the camera acquires the image sequence of the testing track point and extracts vibration information from the image sequence, solves the problem of a larger test error in the prior art, and is applicable to testing the water lubrication rubber tail bearing.

The invention discloses an absolute level meter which comprises a controller, an encoder, an anti-sliding wheel, a leveling bracket, a heavy punch, a heating floater and a measuring rope, wherein the controller is arranged in a waterproof aluminum shell; the controller is connected with the encoder; the encoder is arranged on the leveling bracket; the anti-sliding wheel is fixed on a rotating shaft of the encoder; the measuring rope is hung in an anti-sliding slot in the anti-sliding wheel; the heavy punch and the heating floater are respectively connected with the two ends of the measuring rope.

In order to realize dynamic, real-time and precise special measuring requirements under the environmental condition of a quasi dynamic state (between full static state and high dynamic state), the invention provides a system main body realizing method based on a liquid floating reflecting-type mirror surface reference and an optical self-alignment type measuring tool. By using the method, real-time, automatic and precise measurement on horizontal attitude information of an object is realized under the control of a synchronizing signal and a control microcomputer by taking the local geoid tracked by a liquid floating reflecting-type mirror surface as an absolute level basis reference and utilizing an optical self-alignment type measuring light tube as a detecting means for the change condition of the horizontal attitude of the detected object. The measuring method has the characteristics of distributed property, real-time property, precision and automation and can be used for measuring the horizontal attitudes of moving objects in the quasi dynamic state, the deformation of large structural members and the like.

The invention discloses a cell culture dish. The cell culture dish comprises a base body, wherein the base body comprises a round base plate and a first side wall which is enclosed along the edge of the base plate; an adjusting cavity is formed by the base plate and the first side wall; the adjusting cavity is internally provided with a culture dish body; the culture dish body comprises a bottom wall and a first side wall which extends along the periphery of the bottom wall; a buffering ring is arranged between a second side wall and the first side wall. By adopting the structure, the following three functions are realized; 1, absolute level and absolute vibration-free states can be realized; an adjusting unit on each point can be used for adjusting the culture dish to arbitrary angle andgradient; an absolute level is realized; when a vibration source is arranged at a certain point of the outer part, one adjusting unit or the combination of a plurality of adjusting units vibrates continuously to balance out the vibration source of the outer part; 2, the culture dish can realize various accurate regular movement and anticlockwise sequential vibration in the horizontal direction isrealized; 3, the cell culture dish is convenient to carry and is practical and convenient.

Provided herein are kits, compositions and methods for biomarker detection, and the use of relative or absolute levels of these markers for non-invasive detection of stress and / or relaxation levels in human subjects. In particular, the present invention relates to cortisol, isomer and metabolite markers for stress and / or relaxation levels.

The invention relates to large comprehensive test equipment, and discloses a method for establishing a three-dimensional coordinate system of large test equipment. The method comprises the following steps of: (1) setting a reference surface A and a measurement reference hole; (2) adjusting the reference surface A of a reference seat [1] to level and equal height; (3) pouring a fixed base; (4) adjusting the measurement reference hole of a coordinate reference [2] to the right center of the base and adjusting the upper surface to close to absolute level; and (5) determining the original point of the coordinate system by using the measurement reference hole, forming the X axis of the coordinate system by using three coplanar normal lines of the reference surface A, and projecting the connecting line of the measurement reference hole and one point of the A in the surface A as the Y axis so as to finish the establishment of the three-dimensional coordinate system. The method can guarantee position precision of the large test equipment, and has the advantages of simple implementation structure, good stability, high precision and the like.

The method of correcting MB-seq methylation level based on ridge regression belongs to the field of genetic engineering technology, using machine learning ridge regression theory, and carrying out data training and establishing a prediction model based on the absolute MB-seq methylation level detected by RRBS, for Ridge regression prediction of cytosine sites not covered by RRBS on the genome makes the accuracy of methylation level detection greater than 95%, thereby eliminating the bias of MB-seq and obtaining a genome-wide methylation map. The invention also discloses a methylation level calculation system based on ridge regression. The invention can accurately calculate the methylation level of each CpG in the whole genome from high-throughput sequencing MB-seq data.