65 results about "Atomic physics" patented technology

The invention discloses a benefication method for recovering specularite. The method comprises the processes of primary grinding, grading, primary low intensity magnetic separation, and tailings discarding by primary high intensity magnetic separation; rough concentrate pre-classification by the primary low intensity magnetic separation and the primary high intensity magnetic separation, secondary grinding, secondary low intensity magnetic separation to obtain concentrates, secondary high intensity magnetic separation to obtain concentrates; and selective flocculation desliming secondary conducted on high intensity magnetic separation tailings (middlings), and anionic reverse flotation. The method further comprises the step of arranging a cylindrical slag separating sieve before the primary high intensity magnetic separation. With the advantages that the iron concentrate grade and the iron recovery are high, the loss of granular iron minerals is low, the mineral process flow is short, concentrates and tailings can be obtained in advance and the energy consumption of the benefication is low, the invention can be used not only for selecting specularite ores, but also for selecting weakly magnetic iron minerals, such as hematite, goethite, siderite, limonite, and the like.

A rotational angle detection device enables rotational angle detection for rotational angles ranging from 0° to 360° with an extremely simple configuration. The rotational angle detection device includes: a rotating magnet 12, which is mounted on one end of a rotating shaft 11; a four-pole auxiliary magnet 14, which is mounted on a substrate 13 opposed to the rotating magnet 12 without contact; and a magnetic sensor 15, which is mounted on the opposite side of the substrate 13. The four-pole auxiliary magnet 14 converts one rotating magnetic field of 0° to 360° provided by the rotating magnet 12 in a region where the magnetic sensor 15 is positioned into another rotating magnetic field of 0° to 180°.

The present invention generally relates to a laser processing systems for thermally processing substrates. The laser processing systems include a shield disposed between an energy source of the laser processing system and a substrate which is to be thermally processed. The shield includes an optically transparent window disposed adjacent to a cavity within the shield. The optically transparent window allows annealing energy to pass therethrough and to illuminate the substrate. The shield also includes one or more gas inlets and one or more gas outlets for introducing and removing a purge gas from the cavity within the shield. The purge gas is utilized to remove volatized or ablated components during thermal processing, and to provide a gas of predetermined composition, such as oxygen-free, to the thermally processed area.

An ion mobility spectrometer is provided with at least one ionization chamber (1) through which analyte-containing gas can flow. A radiation source (2) is provided from which ionizing radiation is suitable for ionizing the analyte-containing gas at least partially, enters the ionization space (1). A separation area is located behind the ionization space (1) in the direction of flow, into which the partially ionized gas is admitted as an ion carrier gas (4) and a nearly ion-free gas is admitted as a drift gas (5) in such a way that a flow in which predominantly ion carrier gas (4) flows through cross-sectional areas (6) and predominantly drift gas (5) flows through other cross-sectional areas (7, 7′), becomes established at least in the inlet area of the separation area (8). The drift gas (5) and ion carrier gas (4) flow unidirectionally and the cross-sectional areas (6), through which predominantly ion carrier gas (4) flows, are smaller in at least one dimension than the cross-sectional areas (7, 7′), through which predominantly drift gas (5) flows.

The invention provides an OLED display panel and a manufacturing method thereof, and an OLED display device. The OLED display panel comprises a back plate, a substrate, a driving circuit layer, a light-emitting function layer and a packaging layer, wherein the substrate is arranged on the back plate; the driving circuit layer is arranged on the substrate; and the light-emitting function layer is arranged on the driving circuit layer, the packaging layer is arranged on the light-emitting function layer, and a sum of thicknesses of the back plate and the substrate in an electronic element setting area corresponding to an electronic element setting position is smaller than the sum of the thicknesses of the back plate and the substrate in other areas. In the invention, the thickness of at least one layer of the substrate and the back plate in the electronic element setting area is reduced so that light transmittance of the electronic element setting area is increased, an under-screen camera area is normally displayed, an under-screen camera is realized without digging a hole, a screen-to-body ratio is improved, and a technical problem that a display effect is influenced due to a fact that the under-screen camera area of the existing OLED display panel needs hole digging is solved.

The invention discloses a nuclear magnetic resonance image automatic classification method and device based on an MDCLSTM-LdenseNet network, and belongs to the field of medical image processing. The method comprises the following steps: obtaining nuclear magnetic resonance images of different types of subjects; preprocessing the nuclear magnetic resonance image to obtain a training data set, a verification data set and a test data set; training is carried out on the constructed MDCLSTM-LDenseNet network model, so that the MDCLSTM-LDenseNet network model can be obtained; inputting the test dataset into the trained MDCLSTM-LDenseNet network model to carry out a test; obtaining classification results of the nuclear magnetic resonance images of the three types of subjects with normal cognition, mild cognitive impairment and Alzheimer's disease and classification accuracy of the MDCLSTM-LdenseNet network model; according to the method and the device, used data sets are strictly divided; data leakage is avoided; the method is advantaged in that the training data set, the verification data set and the test data set are not intersected, reliability of classification results of normal cognition, mild cognitive impairment and Alzheimer's disease is guaranteed, classification accuracy is higher, the missed diagnosis rate and the misdiagnosis rate are lower, and doctors can be more effectively and reliably assisted to diagnose Alzheimer's disease.

A primary particulate diffusion eliminating method and an apparatus thereof belong to the technical field of environmental science and engineering, and relate to a method and an apparatus for implanting unipolarity ions to charge and thicken PM 2.5 by diffusion charging thickening, and trapping to eliminate PM 2.5 primary particulates. The apparatus is characterized by comprising a unipolarity ion generation part, a diffusion charging part and an electron trapping part; the eliminating method is characterized by comprising: implanting the PM 2.5 primary particulates and high-concentration unipolarity ions in a high-frequency high-pressure alternating electric field at a time, thickening into primary particulates each with particle size of larger than 2 [mu]m via diffusion charging coagulation, trapping under the effect of static electric field active force to eliminate pollution of the PM 2.5 primary particulates with elimination rate of 85%-99.8%. An effective method is provided for elimination of PM 2.5 primary particulate atmosphere pollution, also can be used in ultrafine dust diffusion charging pre-coagulation of dedusters, and has the advantages of being high in trapping efficiency, substantially low in initial investment and operation cost and energy consumption, and the like.

The invention relates to a manufacturing method of electron emitting member, a cold cathode field emission device and a cold cathode field emission device, comprising the steps of (a) forming, on a predetermined region of a cathode electrode 11 formed on a supporting member 10, a composite layer having a constitution in which carbon nanotube structures 20 are embedded in a matrix 21, and (b) allowing a peel-off layer 24 to adhere onto the surface of the composite layer 22 and then mechanically peeling off the peel-off layer 24, to obtain an electron emitting portion 15 in which the carbon nanotube structures 20 are embedded in the matrix 21 in a state where the top portion of each carbon nanotube structure 20 is projected.

A charged particle separation apparatus that separates ionized gas clusters is disclosed. The charged particle separation apparatus includes three or more electric field applying parts arranged in an incident direction of an ionized gas cluster, wherein each of the electric field applying parts includes a pair of electrodes; an electric power source configured to supply alternating-current electric voltages to the three or more electric field applying parts in such a manner that an alternating-current electric voltage applied across one pair of the electrodes of one of the three or more electric field applying parts is different in phase from an alternating-current voltage applied across another pair of the electrodes of an adjacent one of the three or more electric field applying parts; and a plate including an opening in an extension of the incident direction.

Electrostatic chucks with magnetic cathode liners for critical dimension (CD) tuning are described. For example, an electrostatic chuck (ESC) includes a cathode region. A wafer processing region is disposed above the cathode region. A magnetic cathode liner surrounds the cathode region, below the wafer processing region. The magnetic cathode liner is configured to provide magnetic field tuning capability for the ESC.

A change of a beam current of an ion beam which passes an outside of the side of a forestage beam restricting shutter, and which is incident on a forestage multipoints Faraday is measured while the forestage beam restricting shutter is driven in a y direction by a forestage shutter driving apparatus in order to obtain a beam current density distribution in the y direction of the ion beam at a position of the forestage beam restricting shutter. A change of a beam current of the ion beam which passes an outside of the side of a poststage beam restricting shutter, and which is incident on a poststage multipoints Faraday is measured while the poststage beam restricting shutter is driven in the y direction by a poststage shutter driving apparatus in order to obtain a beam current density distribution in the y direction of the ion beam at a position of the poststage beam restricting shutter. By using these results, an angle deviation, a diverging angle, and/or a beam size in the y direction of the ion beam can be obtained.

A time-of-flight mass selector includes a first ion lens for converging ions, a flight tube into which ions which enter from the first ion lens are introduced, the flight tube having equipotential space therein, a second ion lens for converging ions having passed through the flight tube, and a chopper for a gate for pulsing the ions converged by the second ion lens.

The present invention relates to a photomultiplier having a configuration for improving response time characteristics. The photomultiplier comprises at least a sealed container, a photocathode, and an electron multiplier section. The electron multiplier section has an upper unit and a lower unit. The upper unit includes a focusing electrode, a mesh electrode, and a first dynode. The lower unit includes the subsequent dynodes excluding the first dynode and a pair of insulating supporting members. The length in the longitudinal direction of the first dynode is made greater than the interval between the pair of insulating supporting members. By this configuration, the sizes of the effective regions of the assigned electron multiplier channels can be set arbitrarily without being restricted by the pair of insulating supporting members.

The invention discloses a magnetic resonance fixing device. The magnetic resonance fixing device comprises a mounting plate and is characterized in that a supporting frame is arranged on the mountingplate; a U-shaped connecting seat is arranged at the top of the supporting frame; a screw rod is rotatably connected inside the U-shaped connecting seat; a screw rod sleeve sleeves the screw rod; thescrew rod sleeve is in threaded connection with the screw rod; one end of the screw rod penetrates through the top of the supporting frame and is fixedly connected with a hand ring; two side walls ofthe screw rod sleeve are symmetrically hinged with connecting rods; and the other ends of the connecting rods are respectively hinged with a left arc-shaped block and a right arc-shaped block. The magnetic resonance fixing device has a simple structure and is convenient to operate. The hand ring is rotated to drive the screw rod to rotate, and the screw rod drives the screw rod sleeve to move up and down, so as to drive the connecting rod to open or close the left arc-shaped block and the right arc-shaped block, so that the problem of unstable head fixation in a nuclear magnetic resonance process is solved, ghosting of nuclear magnetic resonance imaging due to head movement is prevented, and accuracy of judgment on patients by doctors is improved.

The invention relates to the field of coating equipment, in particular to magnetic field type single-anode-and-cathode electrophoretic coating equipment which through lorentz force effect on charged particles through a magnetic field, and then the uniformity and compactness of the coating on the surface of a cathode to-be-machined material is greatly improved; the equipment comprises an electrophoresis tank, a cathode structure and an anode structure, wherein the cathode structure and the anode structure are oppositely arranged in the electrophoresis tank, a first magnetic field generating mechanism is arranged at the bottom of the electrophoresis tank, and second magnetic field generating mechanisms are arranged on the two opposite side walls of the electrophoresis tank.

The invention relates to an MLDH (magnetic layered double hydroxides)-Fluorescein intercalation assembled type fluorescent probe. The invention is characterized in that the MLDH-Fluorescein intercalation assembled type fluorescent probe is prepared by a low-temperature ion exchange reaction, with MLDH as carriers and fluorescein as an intercalation object. The synthesized MLDH-Fluorescein probe has superparamagnetism, bright fluorescence signals, high thermal stability, strong nuclear targeting property in cell transmission, and capability of quickly infiltrating a cell membrane and passing through cytoplasm to deliver a fluorescent material to cell nucleus and enrich the fluorescent material to a nucleolus, so that the MLDH-Fluorescein probe can be used as a fluorescent probe for researching a cell transport mechanism of an MLDH system and evaluating the nuclear targeting transmission efficiency. The MLDH-Fluorescein intercalation assembled type fluorescent probe is applicable to establishment of a fluorescein, fluorandiol marked medicament or biomolecular targeting transport system and has the advantages of bright fluorescence signals, high storage stability, integration of multiple functions, simplicity in operation, low cost and the like.

The invention discloses a wafer-level packaging method of a semiconductor device and belongs to the technical field of semiconductor packaging. The method comprises the steps that a silicon wafer is taken; arraying of an insulation layer, a conducting electrode, a silicon through hole, a re-wiring metal layer and the like is completed on the silicon wafer through a wafer-level silicon substrate adapter plate, and an inversion zone is reserved for an LED chip; the LED chip is arranged inversely to the inversion zone; a light transmission layer covering the LED chip is formed, and the surface of the light transmission layer is subjected to roughening; and the silicon wafer obtained after packaging is cut into packaging bodies of single semiconductor devices. According to the wafer-level packaging method of the packaging structure of the semiconductor device, the wafer-level silicon substrate adapter plate technology and the surface roughening technology are used for forming the packaging structure of chips with the same size, size is small, a heat resistance value is low, cost is low, and brightness is high.

An embodiment of the present invention provides a tritium measurement system (100) for a pool reactor, comprising: an attenuation module (10) arranged to be connected with a coolant loop of the pool reactor, from which a coolant flows into the attenuation module (10), the attenuation module (10) attenuating the coolant; a measuring module (11) connected with the attenuation module (10) and used for measuring the tritium activity of the attenuated coolant flowing out of the attenuation module (10); and a circulating module (12) connected with the measuring module (11) and used for discharging the measured coolant into the coolant loop of the pool reactor. According to the tritium measurement system provided by the embodiment of the invention, the tritium measurement precision is improved, the measurement environmental protection property and safety are improved, the long-term measurement operation cost can be reduced, and the personnel investment is reduced.

The invention discloses a semiconductor device with a Schottky metal junction and a manufacturing method thereof. The semiconductor device comprises a substrate and an epitaxial layer formed on the surface of the substrate, a plurality of grooves are formed in the epitaxial layer, and each groove is filled with polycrystalline silicon. A gate oxide layer is formed between the polycrystalline silicon and the trench, a first metal layer is formed on the upper surface of the polycrystalline silicon, a second metal layer is formed on the upper surface, adjacent to the polycrystalline silicon, of the epitaxial layer, the first metal layer is further formed on the upper surface of the epitaxial layer, and a Schottky barrier formed by the second metal layer and the epitaxial layer is different from a Schottky barrier formed by the first metal layer and the epitaxial layer in size. According to the invention, two different barrier metals are used as Schottky contacts, when the device is reversely blocked, the Schottky barrier current is reduced by using the electric field shielding effect of the high-barrier Schottky metal on the low-barrier Schottky metal, and when the device is positively conducted, the device has relatively low conduction voltage drop due to the low-barrier Schottky metal.

The invention discloses a three-dimensional chiral nanometer anti-counterfeiting device and a pattern manufacturing method, and relates to the technical field of nanometer plasma optics. The method comprises: firstly, a three-dimensional chiral nanometer anti-counterfeiting structure block adopting a double-layer aluminum arc structure as a 3D chiral color pixel; secondly, adjusting the central angle of the double-layer aluminum arc structure, realizing the sRGB space function that the right-handed circularly polarized light color palette occupies 32% and the sRGB space function that the left-handed circularly polarized light color palette occupies 19%; arranging the three-dimensional chiral nanometer anti-counterfeiting structure blocks; the three-dimensional chiral nanometer anti-counterfeiting device formed by arrangement displaying different patterns under the irradiation of the left-handed circularly polarized light and the right-handed circularly polarized light. The defects of existing plasma optical encryption are overcome, and 3D chiral color printing has good application prospects in the aspects of optical safety and file authentication.

The invention discloses an electron spin emission based terahertz spectrometer and spectral analysis system. The terahertz spectrometer comprises a fiber femtosecond laser which enables femtosecond light at a spatial light output port to enter a transmitting end; coherent detection light of the fiber output port is input to a receiving end through an optical delay line; a sample holder is positioned between the transmitting end and the receiving end; the transmitting end is used for generating terahertz pulses based on the electron spin effect of a hetero-structure under the combined effect offemtosecond laser excitation and an internal magnetic field; and the receiving end is used for forming a current under the effect of the sample terahertz pulse electric field, measuring the intensityof a specific terahertz pulse waveform point location based on the magnitude of the current, and outputting the intensity to a data acquisition and processing module so as to perform spectral analysis. Thus, the key performance indexes of the bandwidth and dynamic range of the terahertz time domain spectrometer can be effectively improved, the reliability of the whole spectrometer is improved, and the research difficulty and cost are effectively reduced.

The invention relates to a measuring device for picosecond time resolution detection of a single photon weak signal. An optical pulse emission controller is connected with a microsecond optical pulseemitter, a picosecond pulse laser mode locker, a condenser, a sample bin, a fluorescence collector, an optical path transmitter, a color separation grating, an optical path aggregator, a light intensity detector, a preamplifier and a signal detection circuit in sequence; and the picosecond pulse laser mode locker is sequentially connected with the signal detection circuit. The measuring method comprises the following steps: an excitation light source emits a light beam to irradiate a sample to reach an electron excited state, and the device detects the time when a single fluorescence photon emitted by the sample reaches a signal detector to obtain the service life of the excited state; in addition, fluorescence emitted by excited state electrons returning to the ground state is fed back tothe light intensity detector through the optical path transmitter and is converted into an emission spectrum signal. According to the invention, the femtosecond oscillation stage is adopted to calibrate the time, and a standard is established for accurately measuring the technical performance of ultra-fast attenuation.