38 results about "Sensitivity limit" patented technology

The present invention provides improved methods for detection of minimal disease. More specifically, the invention provides methods for combining cell sorting with clonality profiling to effectively lower sensitivity limits for disease detection and to provide independent confirmation of the tumor detection without the need for patient specific assay designs.

Computer implemented methods and systems for detecting arrhythmias in cardiac activity are provided. The method is under control of one or more processors configured with specific executable instructions. The method obtains a far field cardiac activity (CA) data set that includes far field CA signals for beats. The method applies a feature enhancement function to the CA signals to form an enhanced feature in the CA data set. The method calculates an adaptive sensitivity level and sensitivity limit based on the enhanced feature from one or more beats within the CA data set and automatically iteratively analyzes a beat segment of interest by comparing the beat segment of interest to the current sensitivity level to determine whether one or more R-waves are present within the beat segment of interest. The method repeats the iterative analyzing operation while progressively adjusting the current sensitivity level until i) the one or more R-waves are detected in the beat segment of interest and/or ii) the current sensitivity level reaches the sensitivity limit. The method detects an arrhythmia within the beat segment of interest based on a presence or absence of the one or more R-waves and records results of the detecting of the arrhythmia.

A system and method for managing hedge program liability involving obtaining policyholder information that constitutes the liability portfolio and asset information that constitute the asset portfolio; simulating at least one partial sensitivity and valuation for the liability portfolio for projected market data to obtain valuation simulation data. The system and method then involves using market date information estimating at least one partial sensitivity and valuation of the liability and asset portfolios using the simulated partial sensitivity and the market data. Based on comparing the one estimated partial sensitivity against at least one partial sensitivity limit buying or selling one or more assets to restore the estimated partial sensitivity within the limit if the estimated partial sensitivity breaches the at least one partial sensitivity limit.

A quantum polarization-based multidimensional information detection device and method belongs to the laser radar technology field, and is used for solving the problem in the conventional target identification field that a long-distance weak signal echo encounters a sensitivity limit. The quantum polarization-based multidimensional information detection device and method of the present invention is characterized in that a synchronous control module generates a synchronous signal to drive a laser to generate a pulse signal, at the same time outputs the synchronous signal to a polarization state encoder to carry out the horizontal, vertical, diagonal and antidiagonal pseudorandom pulse sequence modulation; the laser after the modulation is carried out the collimation and beam expanding by an emission optical device to irradiate a target, and an echo signal is radiated to a reception optical device and then is divided into four signals by three optical splitters to pass four single-photon detectors Gm-APD respectively; a synchronous signal processor obtains an echo pulse sequence according to the pulse signals detected by the four single-photon detectors Gm-APD, and obtains the multidimensional information of target distance, intensity and polarization according to the echo pulse sequence and the synchronous signal. The quantum polarization-based multidimensional information detection device and method of the present invention is used for the detection of the laser radar long-distance weak signals.

Perfluoroelastomers curable by the peroxidative route with a glass transition temperature below -10°C and an amount of -COF end groups in the polymer below the sensitivity limit of the method described in this invention using Fourier transform IR spectroscopy.

A phase-locked loop circuit has a DLL circuit in a stage preceding an analog PLL circuit. The DLL circuit detects a phase difference between a reference clock signal and a feedback signal, changes the detected phase difference to a phase difference increased so as to be greater than a steady state phase error which the analog PLL circuit has, and supplies the resultant phase difference to the analog PLL circuit. While the phase difference between the reference clock signal and the feedback signal is being detected by the DLL circuit, the analog PLL circuit operates to reduce the increased phase difference to the steady state phase error. As a result, the phase difference between the reference clock signal and the feedback signal is reduced to a sensitivity limit of a phase comparator in the DLL circuit.

The invention discloses a high-sensitivity detecting probe based on an aptazyme sequence and an intermolecular splitting G-quadruplex-hemin DNAses self-assembled nanowire, a kit and a preparation method and application thereof, and is particularly suitable for detection of adenosine triphosphate (ATP). The invention combines an aptamer, Mg<2+>-dependent 10-23 ribozyme, hybridization chain type reaction and the G-quadruplex-hemin DNAses enzymatic reaction, thereby realizing stepwise amplification of a detecting signal and substantially improving the detecting sensitivity which is up to the pmol/L level and is higher than the general detecting sensitivity level nmol/L of the prior art by 3 magnitudes. An ATP aptazyme probe is excellent in working performance, has the detecting sensitivity limited to 2 pmol/L, and is extremely high in specificity. Common UTP, GTP, CTP and other interfering substances have no effect on ATP detection; requirements of medical clinical diagnosis, metabolic studies and the like for an ultrahigh-sensitivity ATP detecting method can be met; and the high-sensitivity detecting probe is extremely high in popularization potential and actual application value inthe industry.

The invention discloses an ultraviolet detector which comprises array-shaped three-dimensional semiconductor nano posts, a tabulate transparent thin-film electrode and a tabulate conductive substrate, wherein the end surfaces at the tops of the semiconductor nano posts are connected with the one side surface of the transparent thin-film electrode, the end surfaces at the bottoms of the semiconductor nano posts are connected with oneside surface of the conductive substrate, the transparent thin-film electrode is parallel to the conductive substrate, a power supply and a current detection unit are connected between the conductive substrate and the transparent thin-film electrode to form a closed loop, and the closed loop is used for measuring the change of a resistance value. The ultraviolet detector has a similar size and the overall thin-film shape as the current ultraviolet detector, a large amount of vertical nano post arrays substitute the overall thin-film structure, the sensitivity of the ultraviolet detector can be improved by increasing the surface area of a semiconductor material on the condition of keeping the two-dimensional area for receiving ultraviolet rays unchanged, the sensitivity limitation of the current ultraviolet detector is successfully broken through, and an ultrahigh-precision nano ultraviolet detector is achieved.

The invention relates to a measuring method and a system of electronic tag matching impedance. The measuring method of the electronic tag matching impedance comprises the steps of connecting a reader-writer, a coaxial wire, a test probe and an electric tag chip in sequence, finding out the minimum output power P0 that the reader-writer can support the electric tag chip to work, connecting a vector network analyzer, the calibrated coaxial wire, the corrected test probe and the electric tag chip in sequence, setting output power of the vector network analyzer to be the P0, obtaining a fourth echo reflected value through measurement, processing the fourth echo reflected value, and obtaining the matching impedance of the electric tag chip. According to the measuring method and the system of the electronic tag matching impedance, a resistance value of the electric tag chip in a sensitivity limit can be obtained, and therefore the antenna design of an electric tag is simplified, design time and cost are saved, and design precision is improved.

The invention discloses an access overload control method of an RAN layer in a clustered M2M network. The method comprises the following steps: (1) dividing MTC equipment in a base station into time delay sensitive equipment and time delay insensitive equipment according to a preset time delay sensitivity limit; (2) acquiring the quantity of users requesting to access in a current time slot by the base station, obtaining a corresponding pilot frequency partition ratio beta * when the total quantity of successfully accessed MTC equipment is maximum, and then acquiring the quantity of pilot-frequency resources allocated to the time delay sensitive equipment and the quantity of pilot-frequency resources allocated to the time delay insensitive equipment according to the corresponding pilot frequency partition ratio beta * when the total quantity of successfully accessed MTC equipment is maximum; (3) realizing user access by adopting an ACB mechanism according to the quantity of the allocated pilot-frequency resources by the time delay sensitive equipment, and realizing user access by adopting the ACB mechanism according to the allocated pilot-frequency resources by the time delay insensitive equipment. The method disclosed by the invention can be used for effectively increasing the access rate of the MTC equipment.

The invention relates to a multi-channel leakage monitoring method for a buried tank area of a gas station and mainly solves the problems of poor applicability, time conservation and labor conservation in the prior art. According to the multi-channel leakage monitoring method for the buried tank area of the gas station, a sample collected by at least one sampling pipe which is arranged in the buried tank area of the gas station flows through one of sample channels of a multi-way valve under the action of a sampling pump and then enters a photoionization combustible gas detector; when the detector detects that the content of volatile organic gas in the sample exceeds the lower sensitivity limit value of the photoionization combustible gas detector and exceeds the upper gas leakage amount setting limit value of a sampling point; a display alarm which is connected with the detector gives an alarm to prompt leakage. According to the technical scheme, the problems are better solved. The method can be applied to leakage monitoring of the buried tank area of the gas station.

The present invention provides a VDF-based curable fluoroelastomers having glass transition temperature lower than -35 DEG C. and an amount of -COF end groups in the polymer lower than the sensitivity limit of the method using the FT-IR spectroscopy described in the present application.

The invention discloses a space-type integrated optical multi-circle ring resonant cavity without intersection. It connects the input waveguide and the output waveguide through a planar coupler, and the planar single-turn ring cavity is connected with the planar coupler to form a planar integrated optical racetrack ring resonator; four vertical S-curved waveguides and two The planar single-circle ring resonators are connected; the four vertical S-curved waveguides are connected through a vertical directional coupler to form a space-type integrated optical two-circle ring resonator without intersections. On this basis, after connecting the vertical S-bend waveguide with the planar single-turn ring cavity, the vertical S-bend waveguide is connected layer by layer with a vertical directional coupler to obtain a space-type integrated optical multi-turn ring resonator without intersections. The invention increases the total cavity length of the annular cavity, improves the limit sensitivity of the resonant micro optical gyroscope; avoids the crosstalk and loss of the intersecting waveguide structure in the planar multi-circle annular cavity; reduces the interference and the two-way transmission of light waves in the annular cavity noise.

A method for operating a data network, which includes at least one transmission link, defined by a transmitter and a receiver, wherein in test mode the actual level reserve in the direction of the sensitivity limit, thus between the actual transmitting power of the transmitter and the actual sensitivity limit of the receiver, is determined for at least one transmission link. To better utilize the transmitting capacity of the data network, in test mode, the actual level reserve in the direction of the overload limit, thus between the actual transmitting power of the transmitter and the actual overload limit of the receiver, is also determined for the at least one transmission link.

The invention discloses a high-sensitivity limit switch, and the switch comprises a shell; the bottom of the shell is provided with a substrate, the shell is internally provided with a limit switch mechanism, and the limit switch mechanism comprises a transmission column, a control panel, reinforcing sleeves and a matching circuit board; the transmission column is movably installed in the shell, the control panel is fixedly connected to the two sides of the surface of the transmission column, and the reinforcing sleeves are fixedly connected to the top and bottom of the transmission column. According to the high-sensitivity limit switch, the transmission mechanism is arranged, the clamping rod can be transmitted, the clamping rod is separated from the shell, and then the shell is taken down, so the effect of automatic disassembly is achieved, and the problem that an existing high-sensitivity limit switch cannot be automatically disassembled is solved. The high-sensitivity limit switch has the advantage of being capable of being automatically disassembled; and a user does not need to manually disassemble through a large number of disassembling tools during maintenance, and then maintenance can be carried out, so the working intensity of the user is relieved.