36 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 application discloses a dual-band fiber Bragg grating demodulation device with a shared demodulation optical path, belonging to the field of fiber optic sensing technology. This application uses a polarization conversion module to convert light from two bands into two orthogonal polarization states, enabling them to share a single demodulation optical path without crosstalk. Simultaneously, this application uses a dispersive element to rationally adjust the incident angles of the two bands, ensuring that the two bands, after incident at different angles, maintain the same diffraction angle upon exiting, thereby further achieving the goal of a shared optical path. This allows this application to achieve dual-band demodulation without reducing demodulation accuracy or maintaining system compactness.

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 utility model discloses a synchronous band-type brake device and an injection molding machine, and relates to the related technical field of injection molding machines. The synchronous band-type brake device comprises a band-type brake template, a plurality of band-type brake mechanisms and a synchronizing mechanism, the band-type brake template is provided with a guide pillar hole for the guide pillar to penetrate through; each band-type brake mechanism corresponds to each guide column, and the band-type brake mechanisms are used for carrying out band-type brake locking on the guide columns; and the synchronizing mechanism is used for driving the at least two band-type brake mechanisms to perform synchronous band-type brake. According to the technical scheme provided by the utility model, the at least two band-type brake mechanisms are connected through the synchronizing mechanism, so that the synchronous band-type brake operation is realized; therefore, synchronous band-type brake locking can be carried out on the multiple guide columns at the same time, and the limiting and fixing effect on the movable mold plate is ensured.

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.

A handheld spearfishing device designed with a pulley system configured to reduce the effective length of the device without compromising the arming distance needed to expel a spear. The housing, comprising front and rear surfaces, lateral side walls, a top wall, and a bottom wall, defines a firing chamber axis and a barrel alongside two band conduits n a parallel direction. This configuration allows for streamlined functionality and efficient deployment of a spear underwater.

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 application discloses a ground object classification method based on dual-band dual-polarized SAR images, which can be used for overall ground object classification and distinguishing different vegetation regions. After image registration of two bands, Wishart algorithm is used for classification, and finally, according to the classification result, image domain fusion is carried out, and the method is suitable for ground object classification of multi-band dual-polarized SAR images which cannot be subjected to data level fusion.

A disclosure of this specification provides a device configured to operate in a wireless system, the device comprising: a transceiver configured with an Evolved Universal Terrestrial Radio Access (E-UTRA)-New Radio (NR) Dual Connectivity (EN-DC), wherein the EN-DC is configured to use three bands, a processor operably connectable to the transceiver, wherein the processer is configured to: control the transceiver to receive a downlink signal, control the transceiver to transmit an uplink signal via at least two bands among the three bands, wherein a value of Maximum Sensitivity Degradation (MSD) is applied to a reference sensitivity for receiving the downlink signal

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.

A communication method and apparatus, which are used for improving the flexibility of a power class used when any two bands in a band combination are concurrent. The method comprises: a terminal acquires first configuration information, the first configuration information being used for indicating an uplink switching band pair list, the uplink switching band pair list comprising a first band pair, and the first band pair comprising a first band and a second band; the terminal receives first scheduling information and second scheduling information, the first scheduling information being used for scheduling to send a first transmission on the first band, the second scheduling information being used for scheduling to send a second transmission on the second band, and the time-domain position of the first transmission overlapping with the time-domain position of the second transmission; and, on the basis of a first power class, the first power class and a second power class, or the second power class and third capability information, the terminal determines the sending power of the first transmission and the sending power of the second transmission.

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.

Disclosed in the present invention are a multi-band multi-channel phase shifter and a multi-band dual-polarized antenna. The multi-band multi-channel phase shifter comprises a metal cavity; a transverse rib is provided in the metal cavity to divide the metal cavity into an upper cavity and a lower cavity which are independent from each other, and the upper and lower side surfaces of the transverse rib are each provided with a partition member facing the interior of the corresponding cavity; the partition members comprise parallel walls parallelly spaced apart from each other relative to the transverse rib, and a vertical wall is connected between the parallel walls and the transverse rib; a metal stripline of an integrated structure is mounted in a single cavity, and the metal stripline comprises phase shifting sections and a combining section which are parallel to each other. According to the present invention, the metal striplines of the integrated structure are mounted in the metal cavity, facilitating assembling, effectively reducing assembling components in existing stack structures, and especially saving the space inside the cavity in the thickness direction. The phase shifter of the present invention can support at least two bands and support the design of dual-polarized base station antennas.

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.

An uplink transmitter switching method is provided, which includes: determining an antenna port state of a current uplink transmission of a terminal device and an antenna port state of a preceding ink transmission of the terminal device, wherein an uplink transmission band for an uplink transmitter of the terminal device is dynamically switched among more than two bands; in response to that the antenna port state of the current uplink transmission of the terminal device and the antenna port state of the preceding uplink transmission of the terminal device meet a preset condition, determining that a switching gap exists for the plink transmitter to switch the uplink transmission band; and omitting reception of uplink information during the switching gap.

A medium-long wave dual-band infrared imaging system based on a refraction-diffraction-metasurface disclosed by the present invention comprises a refraction lens, a diffraction optical element and a metasurface lens which are sequentially and coaxially arranged along a main light path, the diffraction optical element is integrally arranged on the rear surface of the refraction lens, the metasurface lens is arranged behind the refraction lens, and the diffraction optical element is integrally arranged on the rear surface of the refraction lens. The orthographic projection area of the diffractive optical element in the main light path direction is larger than that of the super-structure lens; medium-wave infrared imaging with broadband achromatism is realized within the waveband range of 3-4 microns by medium-wave infrared waveband light; long-wave infrared imaging of broadband achromatism is realized in a wave band range of 8-12 microns by long-wave infrared wave band light; the focal length of the medium-wave infrared imaging is smaller than that of the long-wave infrared imaging. According to the invention, compactness and light weight of the system are realized, independent focal planes of two wavebands are realized through a spatial decoupling mode, crosstalk between the wavebands is significantly reduced, the aberration correction capability of each waveband is improved, and the imaging quality is improved.

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.