17results about How to "Enhanced signal" patented technology

The application provides an enhanced UHF antenna, which comprises an antenna substrate, a gap layer and a resonance substrate arranged in sequence; the resonance substrate is provided with a grounding metal layer on the side far from the antenna substrate, and is provided with a parallel microstrip resonance structure on the side close to the antenna substrate; the parallel microstrip resonance structure comprises three resonance frequency points in the UHF frequency band; the antenna substrate comprises an antenna network composed of a zigzag dipole and a resonance matching strip, and the corresponding impedance real part at 915 MHz is between 10 Ω and 20 Ω, and the impedance imaginary part is between 135 Ω and 155 Ω; the gap layer between the zigzag dipole and the parallel microstrip resonance structure is an air gap layer or a polystyrene foam plastic layer. The application also provides an RFID tag with platform fault tolerance optimization, which comprises the enhanced UHF antenna. The RFID tag of the application exhibits better characteristics in effective identification rate, identification efficiency and identification range.

The application discloses taraxacum-derived carbon dots with tunable fluorescence and application thereof, and two kinds of carbon dots R-CDs and B-CDs with fluorescent colors can be obtained by high-temperature tuning with taraxacum as a carbon source, thereby creating conditions for double-channel fluorescence detection. The R-CDs can detect the percentage content of water in various organic solvents, and the test paper prepared can be repeatedly used for multiple times. The B-CDs are a multi-mode probe with fluorescence / colorimetric / absorption / RGB identification, and can simultaneously analyze and detect DNP in multiple ways. When a certain concentration of DNP is added into the B-CDs probe solution, a relatively significant fluorescence quenching phenomenon occurs, and the color of the solution becomes yellow. The specific detection of DNP is distinguished from other interfering components (metal ions, biological molecules and aromatic nitro compounds), and the detection method can be verified with each other, thereby improving the accuracy of detection. Meanwhile, the double-channel and multi-modal target detection is realized.

This application relates to the field of medical image processing technology, specifically to a hemoglobin emphasis device and method for endoscopes. The device includes a light source unit; an imaging unit for acquiring reflected light signals from a target area under multispectral illumination and outputting a raw Bayer format image or an RGB color image; and an image processing unit for receiving and processing the output Bayer format image or RGB color image, comprising at least: a spectral reconstruction module for calculating and reconstructing a single-band image signal using a spectral reconstruction model; a hemoglobin concentration calculation module configured to calculate a relative hemoglobin concentration based on the image signal; and an image enhancement module configured to perform pixel-level gain adjustment on the raw color image or the processed image, convert it to a set color space for contrast mapping, and finally output a hemoglobin-emphasized image. The image output by this invention can significantly improve the contrast between blood vessels and surrounding tissues.

The application belongs to the technical field of biological probes, and relates to a PD-L1 guided specific targeted CTC detection combined with tumor boundary distinguishing biological probe and a preparation method thereof. The PD-L1 guided specific targeted CTC detection combined with tumor boundary distinguishing biological probe comprises a core, a covalent organic framework and a PD-L1 antibody, the core comprises a superparamagnetic nanoparticle, the covalent organic framework is coated on the surface of the core, and the PD-L1 antibody is combined on the surface of the covalent organic framework. The PD-L1 guided specific targeted CTC detection combined with tumor boundary distinguishing biological probe prepared by the application can be transported into the body across the membrane, smoothly enter a PD-L1 positive malignant tumor lesion, and perform Raman imaging to microscopically distinguish the tumor boundary.

This invention belongs to the field of electrochemiluminescence analysis and detection technology, and relates to an electrochemiluminescence sensor based on a defective titanium metal-organic framework enhanced with a pyrene-based self-assembled hydrogen-bonded organic framework, its preparation method, and its application. The process includes: drop-coating a PSA-HOF / D-Ti MOF dispersion onto a GCE electrode, drying it, adding a methamidophos aptamer, and allowing the reaction to complete at room temperature. The resulting aptamer-modified PSA-HOF / D-Ti MOF electrode is used as the working electrode, Ag / AgCl as the reference electrode, and a Pt electrode as the counter electrode. The electrode is then passed through a PBS phosphate buffer solution containing potassium persulfate, thus forming the PSA-HOF / D-Ti MOF system electrochemiluminescence sensor for the detection of methamidophos. The prepared PSA-HOF / D-Ti MOF system electrochemiluminescence sensor features simpler and more flexible operation, a wide detection range, a low detection limit, and low detection cost.

The invention relates to an isolation driving circuit and method for bidirectional signal power composite isolation transmission, and the circuit comprises an inversion unit, an isolation transformer, a rectification unit and an output unit which are connected in sequence, and a primary harmonic impedance regulation and control unit is arranged between the inversion unit and the isolation transformer. The primary side harmonic impedance regulation and control unit is connected with the main control unit through a primary side signal processing unit, a secondary side harmonic impedance regulation and control unit is arranged between the isolation transformer and the rectification unit, and the secondary side harmonic impedance regulation and control unit is respectively connected with the output unit and the power device through a secondary side signal processing unit. According to the circuit, different harmonic frequency components of voltages of a primary side detection end and a secondary side detection end are modulated through a primary side harmonic impedance regulation and control unit and a secondary side harmonic impedance regulation and control unit, so that a signal flow and a power flow are respectively transmitted under different frequencies, and a driving signal, a state monitoring signal and a power control signal are mutually independent in frequency; and high integration level and high control freedom degree of signal transmission are realized.

A sample support body is a sample support body used for ionizing components of a sample. The sample support body includes a substrate, a conductive layer, and a plurality of particles. The substrate includes a main surface and a plurality of holes opened in the main surface. The conductive layer is provided on the main surface so that the holes are not blocked. The plurality of particles are provided on a surface of the conductive layer. The absorption rate of the plurality of particles with respect to the energy beam used for ionization is equal to or higher than the absorption rate of the conductive layer with respect to the energy beam.

The present disclosure relates to detection of a target nucleic acid sequence using a tag oligonucleotide comprising a synthetic unnatural base. The protocol of the present disclosure increases a target signal by improving the binding affinity or specificity of the hybridization between the target-dependent fragment and the fragment-hybridizing oligonucleotide, and thus it is possible to detect the target sequences with more improved sensitivity.

This application relates to the field of mass spectrometry analysis and detection technology, and in particular to a detection method for enhancing ion recognition, comprising the following steps: Step 1, placing an ultrasonic standing wave device within an ion source, the ultrasonic standing wave device including at least two oppositely arranged acoustic transducer units for emitting sound waves of the same frequency and opposite propagation directions to superimpose and form an ultrasonic standing wave field, and also including a triaxial adjustment mechanism; Step 2, the two acoustic transducer units extending into the ion source cavity and located on both sides of the nozzle, adjusting the position of the acoustic transducer units using the triaxial adjustment mechanism so that the acoustic transducer units are close to the rear of the nozzle, and the center height of the acoustic transducer units is lower than the tip of the nozzle; Step 3, adjusting the spacing between the two acoustic transducer units; Step 4, aligning the standing wave node axially with the entrance of the mass spectrometer detector. This method can enhance the focusing of sample ions, thereby improving the ion recognition effect of the mass spectrometer detector, without changing the internal structure of the ion source.

The present application relates to the technical field of sample preparation methods for mass spectrometry, and particularly relates to a sample preparation method for glow discharge mass spectrometry. The method comprises the following steps: placing a plurality of metal strips on the surface of a mold, placing adjacent metal strips alternately, pouring sample particles into the area enclosed by the plurality of metal strips, then pouring graphite powder on the surface of the mold, the graphite powder completely covering the metal strips and the area enclosed by the metal strips, moving the mold to a tablet press, pressing to obtain a shaped sample, and finally taking out the shaped sample, taking the bottom surface of the shaped sample as a sputtering area, and performing glow discharge mass spectrometry. The sample preparation method uses metal strips to constrain the movement of sample particles during pressing, and uses the conductivity of the metal strips to maximize the signal during sputtering, thereby solving the problems of difficulty in sample preparation of large-particle-size powder, small-size particle samples, and non-conductor samples that cannot be normally tested by glow discharge.

A fluorescence-magnetic resonance dual-modality contrast agent, a preparation method thereof and the use thereof. The contrast agent has the following structure: X-L-Y, wherein: formula (I); R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12 are each independently selected from H, halogen, OH, NH2, COOH, CONH2, NO2, CN, and low alkyl groups, the low alkyl groups can be substituted with halogen, OH, NH2, COOH, CONH2, SO3H, NO2, and CN, wherein R3 and R4, taken together with the carbon atoms to which they are attached, may form a phenyl group or a heterocyclic group; R7 and R8, taken together with the carbon atoms to which they are attached, may form a phenyl group or heterocyclic group; L is a linking group; and Y is a metal chelate.

The invention belongs to the technical field of biomarker detection, and particularly relates to a suspended graphene field effect transistor, a preparation method thereof and application of the suspended graphene field effect transistor in a biosensor. The suspended graphene field effect transistor provided by the invention comprises a substrate, wherein a groove is formed in the upper surface of the substrate; the insulating layers are arranged on the upper surface, except for the groove, of the substrate, the side wall of the groove and the bottom surface of the groove, the electrode layers are arranged on the upper surfaces of the insulating layers and comprise source electrodes and drain electrodes, and the source electrodes and the drain electrodes are located on the upper surfaces of the insulating layers on the two sides of the groove respectively; and the single-layer graphene film is arranged on the upper surface of the electrode layer, covers the groove and is communicated with the source electrode and the drain electrode. The suspended graphene field effect transistor provided by the invention can realize miR-21 detection without marking, is high in detection sensitivity and low in detection limit, can realize miR-21 detection in a fly mole magnitude, and provides a technical approach for promoting early cancer diagnosis.

The application discloses a weak and small target detection method based on a space-time adaptive resonance Mamba network and belongs to the technical field of computer vision and image processing. The method comprises the following steps: acquiring a to-be-detected image sequence, determining an input image sequence from the to-be-detected image sequence by using a sliding time window and constructing an input image sequence tensor; inputting the input image sequence tensor into a visual state space encoder to extract spatial features of each frame of input image; inputting the extracted spatial features into a space-time adaptive resonance fusion module, wherein the module performs implicit motion alignment, motion resonance perception, bidirectional time scanning and local contrast adaptive spatial scanning, finally obtains space-time enhanced features and inputs the space-time enhanced features into a decoder; and finally reconstructing the features by the decoder and outputting a target detection result. The application effectively solves the problems of easy loss of weak and small targets and high false alarm rate in a complex dynamic scene, and significantly improves the detection precision and robustness of weak and small targets.

A method for personalized bandwidth extension in an audio device. The method comprises obtaining an input microphone signal with a first bandwidth, obtaining a first user parameter indicative of one or more characteristics of a user of the audio device, determining, based on the first user parameter, a bandwidth extension model, and generating an output signal with a second bandwidth by applying the determined bandwidth extension model to the input microphone signal.

The application relates to the technical field of medical image processing, in particular to a hemoglobin emphasis device and method for an endoscope. The device comprises a light source part; a shooting part used for collecting reflected light signals of a target area under the multispectral illumination and outputting original Bayer format images or RGB color images; an image processing part used for receiving and processing the outputted Bayer format images or RGB color images, which at least comprises: a spectrum reconstruction module used for calculating and reconstructing single-band image signals by using a spectrum reconstruction model; a hemoglobin concentration calculation module configured to calculate relative hemoglobin concentration based on the image signals; and an image enhancement module configured to perform pixel-level gain adjustment on the original color images or the processed images, convert to a set color space for contrast mapping, and finally output hemoglobin emphasized images. The outputted images can significantly improve the contrast between blood vessels and surrounding tissues.

The utility model provides a kind of electric vehicle bluetooth unlocking device, it is related to electronic equipment technical field, comprising: machine body component;The both ends of the machine body component are equipped with expansion component, the expansion component of machine body component front side position is set to hinged mounting, the head position of machine body component is equipped with suspension component, the circuit board in machine body component is set to clamping installation directly, the convenient installation of circuit board is increased, the key component installed at machine body component is set to positioning structure, after the key component is conveniently positioned and used to stretch out, while the auxiliary shielding of shielding component when key component is retracted, the contact of expansion component and the external block of machine body component, let expansion component increase the diffusion of signal, increase the use convenient effect of device whole, solve the existing bluetooth key induction range smaller, when the problem such as forgetting to lock car occurs, cannot be closed in the position of far distance, lead to the problem of inconvenient use.

This application relates to the field of communications technologies, and discloses a method and an apparatus for indicating a number of repetitions, so that a configuration of a number of repetitions of an SRS and / or a PUSCH is more adaptive to a channel change. The method includes: A network device sends DCI to a terminal device, where the DCI includes first indication information, and the first indication information indicates a number of repetitions of an SRS and / or a PUSCH. Because the DCI has a faster update process than RRC signaling, and overheads are smaller than those of the RRC signaling, the network side device may flexibly configure the number of repetitions of the SRS and / or the PUSCH by using the DCI, to better adapt to the channel change, and further improve a channel estimation capability and signal demodulation performance.