25 results about "Two band" patented technology

To provide a clamp-on type ultrasonic flowmeter which can be easily attached to a pipe in a narrow working space.SOLUTION: A clamp-on type ultrasonic flowmeter 1 for measuring a flow rate of a fluid flowing in a pipe using an ultrasonic wave includes a main-body-side pipe mounting portion 30 for mounting, on a pipe 100, a device main body 10 on which an ultrasonic transducer for transmitting and receiving an ultrasonic wave to and from the pipe 100 is mounted, and an outer pipe mounting portion 20 disposed to face the main-body-side pipe mounting portion 30 via the pipe 100. The band 45 inserted through the two band openings 40 is fastened to fix the body-side pipe mounting part 30 and the outside pipe mounting part 20 to the pipe 100.SELECTED DRAWING: Figure 1

For user equipment (UE) that operates in a multi-link, single-radio (MLSR) mode, an access point (AP) of a (e.g., WiFi) local area network calculates link usage capacities (LUCs) for the different associated bands and performs comparisons based on those LUCs to the client traffic (CT) to select the band(s) to be used to transmit that CT during the next communication session between the UE and the AP. For example, if at least one LUC is greater than CT, then the AP selects the band with the greatest LUC. Otherwise, if two times the LUCs are greater than CT for at least two bands, then the AP distributes CT to the bands proportionately and sequentially. Otherwise, the AP uses conventional spraying to select the band. This band-selection technique provides improved throughput compared to using only conventional spraying for band selection.

The present disclosure provides a method and device for determining filters in a superconducting quantum chip, and related equipment, relating to the technical field of quantum computing, and particularly to the technical field of superconducting quantum chips. The specific implementation scheme is as follows: determining the center frequencies of two band-stop filters based on the center frequency of a quantum bit of the superconducting quantum chip; determining the lengths of the two band-stop filters based on the center frequencies of the two band-stop filters; and determining the line segment length of a target line segment of a readout line between the two band-stop filters as the distance between the two band-stop filters based on the operating frequency range of the quantum bit; wherein the two band-stop filters are connected to the readout line, and the readout line between the two band-stop filters is coupled to a readout cavity so that the two band-stop filters are distributed on both sides of the readout cavity. In the present disclosure, based on the center frequency of the quantum bit, the key parameters of the band-stop filter can be designed to improve the decoherence time of the quantum bit, and the entire process design is simple and easy to implement.

A communication method is performed by a terminal, and includes: reporting option information corresponding to a band combination to a base station with the band combination as a granularity; wherein the band combination includes at least two bands, and correspondingly the band combination includes at least one band pair formed by combining the at least two bands; and the option information indicates a sending form supported by at least one of respective band pairs or respective bands in the band combination.

The utility model relates to the technical field of cranes, in particular to a leveling supporting leg of a crane. Comprising a base for loading the crane, a plurality of hydraulic supporting legs are distributed below the base in a matrix mode, a base is arranged at the bottom end of each hydraulic supporting leg, hydraulic rods are symmetrically arranged at the bottom ends of the bases, a brake seat is fixed to the upper end of a hydraulic cylinder on each hydraulic supporting leg, and arc-shaped band-type brakes are symmetrically and rotationally installed on each brake seat; and the two band-type brakes on the same brake seat synchronously move oppositely or oppositely. A band-type brake device is integrated outside a hydraulic column of the hydraulic supporting leg, and instantaneous locking and quick release of the position of the supporting leg are achieved through cooperative control of mechanical clamping and hydraulic driving. According to the design, the efficient leveling characteristic of a hydraulic system is reserved, the safety redundancy under the extreme working condition is remarkably improved through a rigid braking mechanism, and double guarantees are provided for stable operation of the crane.

This invention provides a hyperspectral classification method based on band erasure and contrastive learning. First, hyperspectral data is acquired and band erasure is performed, resulting in two band-removed hyperspectral images. These images are then preprocessed to obtain sample patches for two branches of a contrastive learning network. A gradient mask is used to cover all patches in the upper branch, while leaving the patches in the lower branch untouched. Random occlusion is applied to the patches in both branches, followed by data augmentation to obtain positive sample pairs. Hyperparameters are set, and the positive sample pairs are input into the contrastive learning network. After training, the network parameters and features are saved. The extracted features and annotations are used as the training set to train a classifier, achieving hyperspectral classification. This invention combines various data augmentation methods suitable for hyperspectral data with contrastive learning, tapping into the potential of contrastive learning in the hyperspectral field and improving classification accuracy to a new level, effectively achieving the classification of spectral images.

The utility model belongs to the technical field of chemical equipment, and discloses a fixing assembly for a high-pressure reactor and a reaction unit, which comprises a square tube profile, embracing belts are slidably mounted on the inner wall of the square tube profile at equal intervals, a high-pressure reactor is mounted between the two embracing belts, a bolt structure is connected between the two opposite embracing belts in a penetrating manner, and the high-pressure reactor and the reaction unit are fixed through the bolt structure. The device comprises a square tube profile, a clamp main body is clamped and mounted on the outer side of the square tube profile, a high-pressure reaction tank is clamped and mounted at the position, located at one end of the square profile, in the clamp main body, arc-shaped clamping plates are slidably mounted at connectors of the two ends of the clamp main body, a fixing plate is welded and mounted on the rear side of the clamp main body, and a sliding rail is fixedly mounted on one end face of the fixing plate. The hoop can adapt to high-pressure reactors of different sizes, the degree of tightness of fixing bodies of the high-pressure reactors can be adjusted, stability is improved, the hoop supporting mode is more stable, and dismounting and mounting are convenient.

The application discloses a base of a workstation host computer, a T-shaped display fixing plate is arranged on the right side of a frame, two bands are arranged on the upper end of the display fixing plate, a turnover plate is arranged on the right side of the frame and can be turned over between horizontal and vertical states, four wheel mechanisms are the same and are correspondingly arranged at the positions of four corners of the frame, a parallelogram structure and a spring damping structure are arranged in each wheel mechanism, a brake device is arranged in each wheel, the brake device can not only lock the rotation of the wheel but also lock the steering of the wheel, a linkage device is arranged between the front two wheels and the rear two wheels, the linkage device can not only provide elastic support for the corresponding two wheels but also realize damping linkage between the corresponding two wheels, when one of the wheels jumps up or down, the other wheel will also increase or decrease the support force correspondingly, so that the base of the host computer is prevented from being twisted and the workstation host computer is prevented from being damaged.

The invention relates to a quick-acting coupling (1) for a clamp having a longitudinal center axis LS, which comprises a first band loop (3); a second band loop (2) spaced from the first band loop, wherein each band loop (2, 3) has a separate loop axis AS parallel to the longitudinal center axis LS; a clamp band (4) extending from a band loop (2, 3) in a circumferential direction; a tightening lever (5) and a tightening screw (6), wherein the tightening lever (5) is mounted on the first band loop (3) for rotation about the loop axis AS and can be rotated between an untightened lever position and a tightened lever position, and wherein the tightening screw 6 connects the two band loops (2, 3) to one another directly or indirectly.

The invention provides a multi-layer absorption and transmission integrated frequency selection wave absorber based on double loss layers and a preparation method, and belongs to the technical field of functional materials. The structure comprises a first loss layer, a second loss layer and two band-pass frequency selective surface layers which are sequentially stacked from top to bottom. Wherein an air layer medium with a certain thickness is arranged between every two layers. Each loss layer adopts an I-shaped derivative metal pattern and is loaded with a resistor, different-frequency impedance matching is realized through differentiated resistor configuration, and ultra-wideband wave absorption is realized; and the band-pass frequency selective surface layer adopts a cross slotted metal pattern, and forms second-order band-pass response through double-layer coupling, so that low-insertion-loss wave transmission and high-selectivity filtering are realized. The structure has the advantages of wide wave-absorbing bandwidth, low wave-transparent insertion loss, good selectivity and the like, and is suitable for an ultra-wideband radar stealth system. The working range covers the S-Ku wave band, the overall thickness is small, experiment and simulation results are consistent, and application potential is achieved in the aspects of radar stealth, electromagnetic compatibility and the like.

The invention discloses a resource-shared dual-band marine navigation radar. The radar is composed of an active antenna unit driven by a servo motor to rotate, a fixed comprehensive electronic case and a terminal placed in a cabin. Wherein the active antenna unit comprises an X-band antenna, an S-band antenna, an X-band four-channel radio-frequency variable-frequency transmitting-receiving assembly, an S-band high-power variable-frequency transmitting-receiving assembly, a five-channel digital transmitting-receiving assembly, a frequency synthesizer and a DBF board. The integrated electronic case is composed of a servo system, an integrated digital processing unit and a secondary power supply, two wave band radars are integrally designed, the height measurement capability of the X wave band radar is improved, the advantages of the two wave bands can be fully utilized, the radar use cost is reduced, the radar target detection range and detection capability are improved, and the product practicability is improved.

A user equipment comprising: means for providing capability information to a network about a capability of the user equipment to support uplink transmit switching; means for receiving from the network, switching gap placement information defining placement of one or more transmission switching gaps when switching between bands of a plurality of bands, wherein the switching gap placement information comprises information indicating a priority for one or more of the plurality of bands; and means for switching transmissions to the network between a respective two bands of the plurality of bands with a respective transmission switching gap having a position based on the switching gap placement information, wherein the position of the respective transmission switching gap is dependent on the priority of each of the respective two bands.

To provide a band attenuation filter advantageous to simplification.SOLUTION: The band attenuation filter includes a signal path that passes a signal in a pass band between a first attenuation band and a second attenuation band that do not overlap with each other. The band attenuation filter includes the first and second acoustic wave resonators and / or the fifth and sixth acoustic wave resonators corresponding to the two band attenuation filters. The first and second acoustic wave resonators connect the signal path and the reference potential portion in parallel with each other and have resonant frequencies in attenuation bands different from each other. The fifth and sixth acoustic wave resonators are connected in series with each other on a skip path that bypasses a node connected to the reference potential portion of the signal path, and have anti-resonant frequencies in attenuation bands different from each other.SELECTED DRAWING: Figure 1

The utility model discloses a kind of anti-drop reinforcing components for pipe sleeve connection, it is related to pipeline connection technical field, including connecting band and two interval setting live buckle ribbon;Every live buckle ribbon includes the band body and band head connected as a whole, and band body is strip-shaped;The both ends of connecting band are respectively provided with a collar, two collars and two band bodies one to one correspond, collar is sleeved on corresponding band body, and collar and corresponding band body can slide relatively;The outside of band body is provided with multiple ratchet teeth evenly arranged along the length direction of band body;Band head includes fixed body, lock tongue, horizontal pivot, permanent magnet and handle.In use, two live buckle ribbons are respectively tightly buckled on two pipes mutually sleeved, since two live buckle ribbons are connected by connecting band, pipe sleeve connection part can be prevented from falling off;Since the tightness of every live buckle ribbon is adjustable, and by handle to move lock tongue, it can contact tight state, live buckle ribbon is taken down and disassembled, convenient to use.

The invention discloses an LTCC filter and terminal equipment. The LTCC filter comprises a ceramic body, a bottom electrode arranged on the bottom surface of the ceramic body, and a first capacitor structure, a second capacitor structure and a third capacitor structure which are arranged in the ceramic body. Wherein the first capacitor structure is connected to the feed electrode at the bottom, the second capacitor structure is connected to the first signal electrode and at least partially coincides with the projection of the first capacitor structure in the vertical direction to form first capacitive coupling so as to support a first frequency band, and the third capacitor structure is connected to the second signal electrode and at least partially coincides with the projection of the second capacitor structure in the vertical direction to support a second frequency band. The first capacitor structure and the second capacitor structure are arranged at intervals to form second capacitive coupling, thereby supporting a second frequency band. Through the design of combining vertical coincidence coupling and lateral interval coupling, while miniaturization of the device is realized, stable shunting and independent tuning of dual-band signals can be realized, mutual interference between two bands is avoided, and thus improvement of isolation is facilitated.

This invention relates to the field of optical thickness measurement technology, specifically a laser-based ice thickness measurement method, comprising the following steps: coaxially superimposing first and second band laser beams to lock the initial phase difference and generate a calibration set; analyzing the reflection and transmission at the beam surface and bottom interface and capturing the waveform using a detector; separating the time-of-flight difference and comparing the propagation delay of the two bands to generate a feature matrix; extracting the power attenuation after propagation and combining it with dynamic refractive index to correct the light speed and obtain the geometric thickness result. In this invention, by constructing a dual-band interface reflection analytical mechanism, the denoising capability of non-uniform beam tracking is enhanced, effectively solving the distortion interference caused by multipath scattering; separating inherent band time delay jitter and reducing signal attenuation caused by medium loss; and combining refraction compensation attenuation correction to correct the physical space solution accuracy, eliminating bubbles and tilt angle optical path errors, ensuring detection purity, and greatly improving the stability and monitoring accuracy of ice layer physical thickness reconstruction.

The application discloses a diplexer based on equivalent local mode surface plasmons, which is characterized by the following steps: parallelly arranging rectangular resonators with different lengths based on equivalent local mode surface plasmons, designing two band-pass filters with different central frequencies, and then connecting the two band-pass filters through T-shaped joints respectively to form a diplexer based on equivalent local mode surface plasmon structure. For different central frequencies, the length of the connection part of the T-shaped joint and the band-pass filter can be adjusted to meet the isolation requirement of two passbands, thereby reducing the complexity of the design of a traditional diplexer and having wide applicability.

The utility model discloses an anti-dropping structure of an infusion apparatus. The anti-dropping structure comprises a first fixing band and a second fixing band, sticky hair is arranged on the surface of one end of at least one of the first fixing band and the second fixing band, and a sticky hook matched with the sticky hair is arranged on the surface of the other end of at least one of the first fixing band and the second fixing band; the elastic connecting band is connected between the first fixing band and the second fixing band; a first binding belt and a second binding belt are connected to the two sides of the elastic connecting belt in a sliding mode respectively, and the end of the first binding belt and the end of the second binding belt form a closed shape through a connecting structure. Compared with an existing snap fastener structure, due to the fact that the sticky hair and the sticky hook are arranged, the tightness degree of the first fixing band and the second fixing band can be adjusted according to the caliber size and experience and flexibility of an operator, and adaptability is better.

The invention discloses a miniaturized high-isolation duplexer, which belongs to the field of radio frequency and microwave, and comprises two band-pass filters, the center frequencies of the two band-pass filters are 7.2 GHz and 10.8 GHz respectively, the passband bandwidths of the two band-pass filters are 300MHz respectively, and the two band-pass filters are used for extracting second harmonic signals and third harmonic signals in a receiving antenna respectively; the filter adopts a coaxial resonant cavity structure with uniform capacitance loading, a resonant cavity is designed in a square cavity chamfering manner, a middle-hollowed 1 / 4 wavelength resonant column, a top end flat plate and a tuning screw are arranged in the resonant cavity, the adjacent resonant cavities realize inductive coupling through a diaphragm coupling (air window coupling) structure, and the coupling strength is adjusted through a coupling adjusting screw. The overall size of the duplexer is 56mm * 30mm * 12mm, the insertion loss in a working frequency band is less than 0.5 dB, the return loss is superior to 15dB, the suppression quantity of a 7.2 GHz channel to a 3.6 GHz fundamental wave signal exceeds 85dB, the suppression quantity of a 10.8 GHz channel exceeds 110dB, the duplexer has the characteristics of miniaturization, low insertion loss, high isolation and strong out-of-band suppression, and the application requirement of a nonlinear node detector can be effectively met.

A system for securing a spinal rod to a bone structure using a connector is provided. The connector functions by modulating friction on a band in two band channels and locking the spinal rod in a separate rod channel. An instrument is also provided for tensioning the band.

This invention discloses a dual-band optical-microwave atomic clock based on cesium atoms and its implementation method. This invention utilizes cesium atoms, currently used for defining the second, as quantum references for both the microwave and optical atomic clocks, realizing atomic clocks in both microwave and optical bands. The two bands can be switched arbitrarily and can be output simultaneously. Compared to optical lattice clocks and ion clocks, the optical clock based on hot cesium atoms does not require an ultrastable local oscillator and an ultracold atomic quantum reference, offering advantages such as small size and long-term continuous operation. Compared to traditional microwave-pumped miniature cesium clocks, applying the laser output from the optical clock to the pump and probe beams of the optically pumped miniature cesium clock reduces laser frequency noise, resulting in a microwave clock with higher frequency stability. This invention requires only one local oscillator laser source, featuring a simple structure, convenient operation, excellent performance, and low cost. This invention is highly practical, expanding the application range of cesium-based microwave atomic clocks and miniaturized high-performance optical frequency atomic clocks.

A system for sample holder scanning is provided. The system comprises: a light source; a multi-band excitation filter configured to select light of at least two excitation bands for a fluorescent dye used in the sample holder. The system further includes: a multiband dichroic filter configured to reflect light of the at least two excitation bands; and a multi-band emission filter configured to transmit the fluorescent emission light of at least two bands from each reaction site of the sample holder. The multiband dichroic filter is further configured to transmit the fluorescent emission light of the at least two bands. The system also includes an optical sensor configured to detect the fluorescent emission light of the at least two wavebands to generate an image of the sample holder.

The present disclosure relates to a terminal transmitter state determination method, a system, a base station and a terminal, relating to the technical field of communications. The method of the present disclosure comprises: sending transmitter state configuration information from a base station to a terminal, wherein a band on which transmitter chains of the terminal perform uplink transmission is dynamically switched among more than two bands, and the transmitter state configuration information is configured to, in a case that a selectable transmitter state of the terminal is not unique after the band on which the transmitter chains of the terminal perform the uplink transmission is switched, indicate the transmitter state of the terminal after the switching.

The invention, which belongs to the technical field of optical image processing, provides a sea surface flare suppression method based on a dual-band amplitude-division type polarization camera, and the method comprises the steps: obtaining dual-band sea surface flare polarization images at a plurality of polarization angles through employing the amplitude-division type polarization camera, and calculating the polarization information of the obtained dual-band sea surface flare polarization images; calculating a light intensity value at each polarization angle according to the obtained polarization information of the polarization image, and determining an optimal polarization direction based on the light intensity values; and processing the image in the optimal polarization direction, and fusing the dual-band image in the optimal polarization direction to remove flare. According to the invention, through the dual-band amplitude-division type polarization camera, simultaneous detection of sea surface flare in different spectral waves can be realized, information of two bands can be fused, characteristics of the sea surface flare can be analyzed more comprehensively, and the flare suppression accuracy and efficiency are improved.