35 results about "Relaxation frequency" patented technology

Detail is apparatus for collecting particles from a liquid, including a first electrode having an upper surface defining one or more substantially circular areas of a predetermined diameter separated from a counter electrode, having an uppersurface bounding at least in part the circular area or areas of the first electrode, by a predetermined gap and equipment for applying an alternating potential difference of a predetermined magnitude at a predetermined frequency lower than the charge relaxation frequency of the liquid across the electrodes whereby particles from the liquid are focused onto the circular area or areas of the first electrode through an induced electro-osmotic flow in the liquid.

Sensor and process for measuring mass of water on a sheet forming fabric. The sensor includes a microwave element positionable to couple an electromagnetic field into a stock layer to be measured, and a microwave signal generator coupled to the microwave element to generate, in the microwave element, a microwave signal having a frequency lower than a relaxation frequency of water. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

The general field of the invention is that of gyrolasers comprising at least one ring-shaped optical cavity comprising at least three mirrors, a solid state amplifying medium pumped by a laser diode whose optical emission power is determined by a current supply source, the cavity and the amplifying medium being such that two so-called contra-rotating optical modes propagate in opposite directions to each other within the said optical cavity, the gyrolaser being a class B gyrolaser, the gyrolaser also comprising means of measuring the difference in optical frequency existing between the two optical modes. The gyrolaser comprises means of measuring the total optical power circulating in the optical cavity and first means of control of the current delivered by the supply source in such a way as to maintain the total optical power substantially constant in a narrow spectral band centred on the relaxation frequency of the laser.

Device and process for measuring mass per unit area of sheet products and / or density of material in a pipe. The device includes a microwave element positionable to couple a high frequency electromagnetic field into a sheet to be measured, and a microwave signal generator coupled to the microwave element to generate at least one operating frequency having a frequency substantially higher than a relaxation frequency of water in said microwave element. A device for measuring an effect of the sheet on the high frequency electromagnetic field is provided, as is a device for calculating mass per unit area based upon the measured effect of the sheet on the high frequency electromagnetic field. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

A method and apparatus for fractionation of a mixture of particles and for particle analysis are provided, in which LEAPS (“Light-controlled Electrokinetic Assembly of Particles near Surfaces”) is used to fractionate and analyze a plurality of particles suspended in an interface between an electrode and an electrolyte solution. A mixture of particles are fractionated according to their relaxation frequencies, which in turn reflect differences in size or surface composition of the particles. Particles may also be analyzed to determine their physical and chemical properties based on particle relaxation frequency and maximal velocity.

One embodiment of the present application sets forth a method for detecting cancerous cells in a sample of excised tissue. The method includes a first subset of electrodes included in an electrode array measuring, at a first operating frequency, a first impedance of a first section of the sample. The method also includes computing a first Cole relaxation frequency for the first section of the sample based on the first impedance. The method also includes determining that the first section of the sample contains cancerous cells based on the first Cole relaxation frequency.

The invention relates to a magnetically soft alloy having high initial magnetic conductivity and used under a high-frequency condition. The magnetically soft alloy comprises the following components by mass percent: 15.38 percent of Fe, 0.6 percent of Cu, 2.5 percent of Nb, 11 percent of Si, 9 percent of B and the balance being Co. The preparation method comprises the following steps: uniformly mixing the components according the mass percent, smelting the mixture in a vacuum induction furnace to form master alloy ingot, and producing an amorphous alloy strip through a single-roll melt rotating fast quenching method after the master alloy ingot is cooled; and heating, preserving the heat and cooling the amorphous alloy strip in a magnetic-field-free vacuum tubular furnace. The magnetically soft alloy has the advantages that the preparation process is simple and the cost is low; the high-frequency performance is excellent, and the relaxation frequency reaches up to 5.03MHz; the quality factor of the magnetically soft alloy is 5.08 under the condition of 1MHz; the initial magnetic conductivity is maintained at 260 under the condition that the frequency is 1kHz to 1MHz and the magnetic field is 0.05A / m.

The invention discloses a composite amorphous magnetically soft alloy having high initial permeability and high quality factor. The alloy comprises components of Fe69.21Co7.69Cu0.6Nb2.5Si11B9-Ni71P29. A preparation method comprises the following steps: firstly, an amorphous magnetically soft alloy thin strip is prepared; then, chemical nickel-phosphorus plating liquid is prepared; and the composite amorphous magnetically soft alloy is prepared by a chemical deposition method. The composite amorphous magnetically soft alloy has the following advantages: the composite amorphous magnetically soft alloy prepared through the chemical deposition method is excellent in high-frequency performance; the relaxation frequency is high up to 3.8 MHz; the quality factor is 41 under the condition of 1 MHz; the initial permeability is kept at 6000 under the conditions of frequency of 1 kHz-1 MHz and magnetic field of 0.05 A / m, and is basically invariable; and the composite amorphous magnetically soft alloy is simple in process, convenient to operate, low in cost and suitable for large-scale industrial production.

The invention discloses a device and a method for detecting gas concentration on the basis of ultrasonic principles. The device comprises a device body, a single chip microcomputer unit, a temperaturemeasuring circuit, a pressure measuring circuit, a motor control circuit, a driving circuit, a switch circuit, a signal amplification circuit, a time measuring circuit, a peak value detection circuitand ultrasonic transducers. The device and the method for detecting the gas concentration on the basis of the ultrasonic principles have the advantages that echo signals of two frequency points can be measured by two pairs of mounted ultrasonic transducers by the aid of certain designs, peak values of the echo signals further can be obtained by the aid of certain circuit designs, sound absorptioncoefficients of gas and sound velocities can be obtained by means of certain calculation, the maximum sound absorption values and relaxation frequencies can be obtained by means of further calculation, mathematical models built in early experiments are applied, the current gas concentration can be obtained by the aid of internal table lookup and interpolation processes for single chip microcomputers, accordingly, measuring processes are simple and convenient, and the device and the method are practical.

Disclosed are a nano-crystalline soft magnetic material high in saturation magnetization intensity and a preparation method of the nano-crystalline soft magnetic material. The chemical formula is Fe<86>B<13>Cu<1>. The preparation method includes steps of (1) preparing a master batch according to components of Fe<86>B<13>Cu<1> alloy, performing vacuum melting to obtain alloy ingot, and preparing Fe<86>B<13>Cu1 amorphous strips on a quick vacuum quenching furnace; and (2) annealing the Fe<86>B<13>Cu<1> amorphous strips prepared in the step (1) at the temperature of 390-468 DEG C for one hour by means of hot isostatic pressure ranging from constant pressure to 200MPa. The fe<86>B<13>Cu<1> nano-crystalline alloy has good soft magnetism and is the good-performance nano-crystalline soft magnetic material, and resistivity, saturation magnetization intensity, coercivity, initial permeability and relaxation frequency are 183 mu omega cm, 1.94T, 12A / m, 9.2X104 and 4.9X104Hz respectively.

Sensor and process for measuring mass of water on a sheet forming fabric. The sensor includes a microwave element positionable to couple an electromagnetic field into a stock layer to be measured, and a microwave signal generator coupled to the microwave element to generate, in the microwave element, a microwave signal having a frequency lower than a relaxation frequency of water. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

The invention discloses a method for measuring the pressure intensity of an excitable gas (diatomic or polyatomic molecular gases, such as natural gas, carbon dioxide, chlorine) pressure vessel. The method comprises the following steps: placing two ultrasonic probes with frequencies f1 and f2 and a thermocouple in the gas pressure vessel, and obtaining the measurement values of acoustic absorptioncoefficients alpha(f1) and alpha(f2) on two selected frequency points f1 and f2 and measurement values of sound speeds c(f1) and c(f2) through the two ultrasonic probes, wherein the measurement values are used for the synthesis of the acoustic relaxation frequency fm of the gas; measuring the current gas temperature measured through the thermocouple, measuring the gas reference acoustic relaxation frequency f0 when the current gas temperature is measured to be 1 standard atmospheric pressure (i.e., 1 atm = 101.325 kPa) in a manner of table look-up; and obtaining the pressure intensity of thegas vessel through the synthesized acoustic relaxation frequency fm and the reference acoustic relaxation frequency f0. The method is advantageous in online detection, lossless detection, quick response, miniature low power consumption, simple composition, stable long-time operation, and high measurement precision.

The invention discloses a nanocrystalline alloy magnetic core and a preparation method thereof. According to the nanocrystalline alloy magnetic core provided by the invention, multi-field coupling heat treatment is carried out on a quenched alloy material to obtain the nanocrystalline alloy magnetic core, wherein the quenched alloy material comprises at least one of a compound with the chemical formula as shown in formula I. The nanocrystalline alloy magnetic core has high relaxation frequency and low high-frequency loss. According to the invention, the high-frequency characteristic of the nanocrystalline magnetic core is realized through multi-field coupling of the heat field, the magnetic field and the stress field and real-time relegation and control, so that the relaxation frequency ofthe nanocrystalline alloy magnetic core is improved and the high-frequency loss is reduced.

One embodiment of the present application sets forth a method for predicting recurrence of cancerous cells in a patient that includes measuring, by a first subset of electrodes included in an electrode array operating at a first frequency, a first impedance of a first section of a first sample of tissue excised from the patient, computing a first Cole relaxation frequency for the first section of the first sample based on the first impedance, and generating a first prediction relating to cancerous cells in the patient based at least in part on the first Cole relaxation frequency.

The application discloses a nanocrystalline alloy magnetic core and a preparation method thereof. In the nanocrystalline alloy magnetic core provided by the present application, the nanocrystalline alloy magnetic core is obtained by subjecting a quenched alloy material to multi-field coupled heat treatment; the quenched alloy material includes at least one compound of the chemical formula shown in Formula I. The nanocrystalline alloy magnetic core has high relaxation frequency and low high frequency loss. And the present application provides a multi-field coupling of thermal field, magnetic field and stress field and real-time regulation of the high-frequency characteristics of the nanocrystalline magnetic core, thereby increasing the relaxation frequency of the nanocrystalline alloy magnetic core and reducing high-frequency loss.

A touch sensor configured to sense a touch object is provided. The touch sensor includes a sensing device and a sensing circuit. The sensing device includes a substrate, a sensing electrode, a sensing common electrode and a shielding layer. The sensing electrode and the sensing common electrode are disposed on the substrate. The shielding layer is disposed on the sensing electrode and the sensing common electrode. The sensing circuit is electrically connected to the sensing device. The sensing circuit includes a resistor device. A relaxation frequency of a relaxation signal of the touch sensor is determined according to a resistance of the resistor device and / or a parasitic resistance of the sensing device. A pulse difference of the relaxation signal is changed by the touch object. The touch object is a conductor. An electronic paper display panel and an electronic paper display apparatus including the foregoing touch sensor are also provided.

The invention discloses a preparation method of a composite amorphous soft magnetic alloy with excellent (alternating current) AC stability, the composite amorphous soft magnetic alloy composition is Fe38.45Co38.45Cu0.6Nb2.5Si11B9-Ni71P29, and the preparation method is as follows: firstly, an amorphous soft magnetic alloy thin strip is prepared, then a chemical plating nickel phosphorus plating bath is prepared, and the composite amorphous soft magnetic alloy is prepared by chemical deposition method. The advantages are that: the high frequency performance of the composite amorphous soft magnetic alloy made by the chemical deposition method is superior, the relaxation frequency is up to 3.75MHz, the quality factor is 77.5 at 1MHz, the initial magnetic permeability is kept at 7700 basically and constantly in the frequency range of 1kHz-1MHz and under the condition of the magnetic field of 0.05 A / m, and the preparation method is simple in process, easy in operation, low in cost, and suitable for mass production.

The invention discloses a method for measuring a gas acoustic relaxation absorption coefficient. The method comprises the following steps: measuring sound velocity values c (f1), c (f2) and c (f3) ofultrasonic waves with ultrasonic frequencies of f1, f2 and f3 in gas to be measured; calculating the relaxation intensity epsilon; calculating a relaxation frequency fm; calculating an absorption maximum value [mu] m; calculating a dimensionless acoustic relaxation absorption coefficient mu (f); calculating a sound velocity frequency dispersion spectrum c (f); and calculating an acoustic relaxation absorption coefficient alpha (f). According to the method, the acoustic relaxation absorption coefficient changing along with the frequency is calculated according to the acoustic velocity measurement values which are easily and accurately measured in real time on the three frequency points, and the calculated acoustic relaxation absorption result does not need to be compensated for other reasons; therefore, the technical bottleneck that the existing gas sensing technology based on the acoustic relaxation phenomenon is difficult to accurately measure acoustic relaxation absorption in real time at low cost can be solved.

The invention discloses a hypnosis music control method and device, computer equipment and a readable storage medium. The method comprises the steps that current breathing frequency of a user is collected, and the output frequency of hypnosis music is adjusted according to the current breathing frequency, so that the output frequency is equal to the current breathing frequency; if the current breathing frequency is greater than a preset breathing value and is not greater than the output frequency after a preset time, a relaxation frequency value for reducing a step length is set, and the output frequency is upgraded once according to the relaxation frequency value until the current breathing frequency is not greater than the preset breathing value; and if the current breathing frequency is greater than the output frequency after a preset time, the operation of adjusting the output frequency is repeated according to the current breathing frequency to enable the output frequency to be equal to the current breathing frequency. With adoption of the method, the technical problem that the universality is not high when a fixed music source is used in the prior art is solved.

The invention discloses a preparation method of a composite amorphous magnetically soft alloy material. The composite amorphous magnetically soft alloy material comprises components of Fe67Co18Si11B4-Ni71P29. The preparation method comprises the following steps: firstly, an amorphous magnetically soft alloy thin strip is prepared; then, chemical nickel-phosphorus plating liquid is prepared; and the composite amorphous magnetically soft alloy is prepared by a chemical deposition method. The composite amorphous magnetically soft alloy material has the following advantages: the composite amorphous magnetically soft alloy prepared through the chemical deposition method is excellent in performance; the initial permeability can be increased by one order of magnitude under the conditions of frequency of 1 kHz-1 MHz and alternating magnetic field of 0.05 A / m, and is basically invariable by being kept at 1870; and the relaxation frequency and the quality factor are obviously improved compared with a traditional alloy. The composite amorphous magnetically soft alloy is simple in process, convenient to operate, low in cost and suitable for large-scale industrial production.

The invention provides an identification method and system based on multi-frequency electromagnetic induction and relaxation frequency parameters. The identification method comprises the following steps that 1, relaxation frequency characteristic parameters of a detected object are obtained through frequency response calculation of a multi-frequency electromagnetic induction coil; and step 2, the material type of the detected object is identified by using relaxation frequency parameters in combination with a machine learning algorithm. The identification method and system based on multi-frequency electromagnetic induction and relaxation frequency parameters provided by the invention solve the problem that an electromagnetic induction mine detector in the prior art is difficult to accurately detect low metal mine, and reduces the false alarm probability of the mine detector to weakly magnetic impurities at the same time.

The invention discloses a method for measuring relaxation behaviors of counter ion pairs in a polyelectrolyte brush. The method comprises the following steps: bonding an initiator to a gold chip by chemical reaction; chemically grafting a monomer onto the gold chip by a radical polymerization method to obtain a gold chip with a polyelectrolyte brush; putting the gold chip with the polyelectrolytebrush in a sample cell and soakng it with a solution; obtaining the relaxation frequency of the counter ion pairs inside the polyelectrolyte brush in the solution by cooperatively using an electrochemical workstation and a quartz crystal microbalance electrochemical module. By adopting the method of cooperatively using the electrochemical workstation and the quartz crystal microbalance electrochemical module and by grafting the polyelectrolyte brush on the gold chip, on one hand, a quartz crystal microbalance can be utilized to measure the mass and viscoelasticity changes of polyelectrolyte brush films in different sodium chloride solutions in real time; on the other hand, the electrochemical workstation can also be utilized to simultaneously measure the relaxation behaviors of the counterion pairs inside the polyelectrolyte brush in the different solutions.

The invention provides a method for the query relaxation of XML (extensive makeup language) data. The method comprises the following steps: A. acquiring side relaxation results by relaxing path query, and coding approximate results in a compact manner; and B. acquiring the relaxation results, in which operations are deleted by leaf nodes, by recursively constructing a leaf deletion query mode. The invention can calculate the minimal relaxation consumption of each possible relaxation path among the paths in each document in the process of initializing the element data structure. Accordingly, the minimal relaxation frequency, at which the approximate results are acquired, can be directly calculated after the initialization.

The invention discloses a method for measuring the pressure intensity of an excitable gas (diatomic or polyatomic molecular gases, such as natural gas, carbon dioxide, chlorine) pressure vessel. The method comprises the following steps: placing two ultrasonic probes with frequencies f1 and f2 and a thermocouple in the gas pressure vessel, and obtaining the measurement values of acoustic absorptioncoefficients alpha(f1) and alpha(f2) on two selected frequency points f1 and f2 and measurement values of sound speeds c(f1) and c(f2) through the two ultrasonic probes, wherein the measurement values are used for the synthesis of the acoustic relaxation frequency fm of the gas; measuring the current gas temperature measured through the thermocouple, measuring the gas reference acoustic relaxation frequency f0 when the current gas temperature is measured to be 1 standard atmospheric pressure (i.e., 1 atm = 101.325 kPa) in a manner of table look-up; and obtaining the pressure intensity of thegas vessel through the synthesized acoustic relaxation frequency fm and the reference acoustic relaxation frequency f0. The method is advantageous in online detection, lossless detection, quick response, miniature low power consumption, simple composition, stable long-time operation, and high measurement precision.

The invention discloses a preparation method of a composite amorphous magnetically soft alloy material. The composite amorphous magnetically soft alloy material comprises components of Fe67Co18Si11B4-Ni71P29. The preparation method comprises the following steps: firstly, an amorphous magnetically soft alloy thin strip is prepared; then, chemical nickel-phosphorus plating liquid is prepared; and the composite amorphous magnetically soft alloy is prepared by a chemical deposition method. The composite amorphous magnetically soft alloy material has the following advantages: the composite amorphous magnetically soft alloy prepared through the chemical deposition method is excellent in performance; the initial permeability can be increased by one order of magnitude under the conditions of frequency of 1 kHz-1 MHz and alternating magnetic field of 0.05 A / m, and is basically invariable by being kept at 1870; and the relaxation frequency and the quality factor are obviously improved compared with a traditional alloy. The composite amorphous magnetically soft alloy is simple in process, convenient to operate, low in cost and suitable for large-scale industrial production.

A touch sensor configured to sense a touch object is provided. The touch sensor includes a sensing device and a sensing circuit. The sensing device includes a substrate, a sensing electrode, a sensing common electrode and a shielding layer. The sensing electrode and the sensing common electrode are disposed on the substrate. The shielding layer is disposed on the sensing electrode and the sensing common electrode. The sensing circuit is electrically connected to the sensing device. The sensing circuit includes a resistor device. A relaxation frequency of a relaxation signal of the touch sensor is determined according to a resistance of the resistor device and / or a parasitic resistance of the sensing device. A pulse difference of the relaxation signal is changed by the touch object. The touch object is a conductor. An electronic paper display panel including the foregoing touch sensor is also provided.

The invention provides a touch sensor for sensing a touch object. The touch sensor comprises a sensing element and a sensing circuit, wherein the sensing element comprises a substrate, a sensing electrode, a sensing common electrode and a shielding layer; the sensing electrode and the sensing common electrode are arranged on the substrate; the shielding layer is disposed on the sensing electrode and the sensing common electrode; the sensing circuit is electrically connected to the sensing element; the sensing circuit includes a resistive element; the relaxation frequency of the relaxation signal of the touch sensor depends on the resistance value of the resistance element and / or the parasitic resistance value of the sensing element; and the pulse wave variation value of the relaxation signal is changed by touching an object. The touch object is a conductor. In addition, the invention also provides an electronic paper display panel and an electronic paper display device comprising the touch sensor.

The invention relates to a gas detection method and device based on a sound velocity frequency dispersion spectrum inflection point, electronic equipment and a computer readable storage medium. The method comprises the steps: obtaining the frequency and sound velocity value of to-be-detected gas, taking the frequency of the to-be-detected gas as an independent variable, and taking the sound velocity value of the to-be-detected gas as a dependent variable to construct a sound velocity frequency dispersion spectrum curve function; calculating to obtain the relaxation frequency and the sound velocity value of an inflection point on the sound velocity frequency dispersion spectrum curve according to the coefficient value of the sound velocity frequency dispersion spectrum curve function; and determining the gas components of the to-be-detected gas according to different relaxation frequencies and sound velocity values of the corresponding inflection points under different gases and different concentrations. According to the gas detection method based on the sound velocity frequency dispersion spectrum inflection point, the accuracy of gas detection is improved, and the detection range of gas detection is enlarged.