66 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

The invention belongs to the technical field of phase shifters, and relates to a non-reflection type adjustable phase shifter which comprises a parallel coupling line unit, a non-reflection filtering unit and an all-pass phase shifting unit. The parallel coupling line unit comprises two coupling lines which are arranged in parallel, and each coupling line is connected with the non-reflection filtering unit and the all-pass phase shifting unit; the non-reflection filtering unit is formed by cascading two band-stop branches, and the two band-stop branches are respectively connected with the two coupling lines in a one-to-one correspondence manner; the impedance of the non-reflection filtering unit is adjustable, so that the impedance is matched with the load impedance; the all-pass phase shift unit comprises two all-pass phase shift branches, and the two all-pass phase shift branches are respectively connected with the two coupling lines in a one-to-one correspondence manner; the signal phase of the all-pass phase shifting unit is adjustable and the signal amplitude is constant, so that the adjustable phase shifter is realized. According to the invention, a wide phase shift range of 0-360 degrees and a good out-of-band suppression effect can be realized at the same time.

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 invention discloses an FMCW radar range finding method and device, the device comprises a data acquisition unit, a preprocessing unit, a core processing unit and a call management unit, a range finding experiment is carried out through a dual-band radar joint model, so that the range finding error of radar sensors of two bands is evaluated, and the range finding error of the radar sensors of the two bands is evaluated; interference factor information is introduced to be combined with distance measurement errors to carry out interference influence function analysis, so that the influence degree of the interference factor information on the distance measurement errors of the radar sensors of the two frequency bands is evaluated, targeted distance measurement correction is carried out, and the dual-frequency-band technology is used in a combined mode; therefore, the frequency range radar sensor adapting to the current ranging application scene is preferably selected and automatically called, or double-radar fusion ranging is synchronously called, finally, the precision and anti-interference capability of FMCW radar ranging are improved, and the robustness and accuracy of the whole device are improved.

This application provides a communication method and apparatus. The method includes: A terminal device reports capability information, where the capability information includes an indication information set of N band set pairs, each piece of indication information in the indication information set is associated with one band set pair, the indication information indicates switching of a transmission branch performed by the terminal device between two band sets in the band set pair, the band set includes at least one of L bands in the band set pair, and L is an integer greater than or equal to 3. In the foregoing manner, a data transmission rate and spectrum utilization efficiency of the terminal device can be improved.

Provided is a terminal that can appropriately execute uplink transmission switching. This terminal comprises: a reception unit that receives, from a base station, configuration information related to switching in a switching scheme in which three or more bands to be used for transmission can be configured and two ports can be switched between the bands; and a control unit that, when only two bands are configured to be used in the configuration information, determines whether to perform transmission switching for switching between transmission using one of the two bands at only one of the two ports and transmission using the other of the two bands at only the other of the two ports, or not to perform the transmission switching.

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 present invention relates to a dual-band continuous zoom beam expander lens, comprising: a lens body; the lens body comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, arranged coaxially from front to back along the optical axis from the object side to the image side; the first lens is a front fixed lens group that remains stationary during zooming; the second and third lenses are a zoom lens group; the fourth lens is a compensating lens group; the fifth and sixth lenses are a rear fixed lens group; the zoom lens group and the compensating lens group can be moved forward and backward along the optical axis, respectively, so that the output laser beam expansion magnification of the lens body can be adjusted. The present invention can achieve 1.064μm and medium-wave 3.8μm dual-band co-aperture continuous zoom beam expander, involving a large band span, which can meet both the distance measurement of 1.064μm laser and the infrared auxiliary illumination of 3.8μm medium-wave laser. The co-aperture design of the two bands can effectively reduce the volume and weight.

Provided are an authentication method and apparatus, a device, and a storage medium. The method includes, if an optical line terminal operates in at least two bands, setting at least one low-delay band and at least one non-low-delay band; after receiving, in a non-low-delay band, a first serial number sent by an optical network unit (ONU) or an auxiliary authentication device, acquiring an equalization delay; after receiving, in the non-low-delay band, an authentication request sent by the ONU or the auxiliary authentication device, determining an ONU identifier according to the first serial number or a second serial number of the ONU in a low-delay band, where the second serial number is sent by the ONU in the non-low-delay band; and authenticating the ONU according to the ONU identifier and the equalization delay.

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 relates to a cotton fiber impurity rate measuring method based on dual-band monitoring, and the method specifically comprises the steps: building a pipeline experiment platform, and simulating the dynamic change of the fiber impurity rate of an impurity falling region in actual cotton carding production; respectively collecting the reflectivity of the cotton fibers and the various falling impurities in different wavelength ranges, and obtaining the reflection spectrum data of the fibers and the falling impurities; based on the reflection spectrum data, selecting two wavebands with the maximum reflectivity difference as monitoring wavebands, and screening out first monitoring light and second monitoring light from the two wavebands; irradiating the same fiber impurity sample by using the two monitoring lights, and collecting reflected light electric signals of samples with different impurity rates to obtain dual-band reflected light voltage signals and impurity rate data; the cotton fiber impurity rate measuring method is established by fitting the function relationship between the dual-band voltage signal and the fiber impurity rate. According to the invention, high-efficiency, accurate and nondestructive measurement of the falling impurity content of the fiber under the working condition can be realized.

One general aspect of the present disclosure includes a device configured to operate in a wireless system. The device including: a transceiver configured with a plurality of Evolved UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access (E-UTRA) operating bands; and a processor operably connectable to the transceiver, the processer is configured to: control the transceiver to transmit an uplink signal via two bands among the plurality of E-UTRA operating bands, wherein the two bands are configured for uplink carrier aggregation (CA), and consists of a first band and a second band; and control the transceiver to receive a downlink signal via one or more band from the three bands among the plurality of E-UTRA operating bands, wherein the three bands are configured for downlink CA, are consists of the first band, the second band, and a third band.

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 communication method includes receiving a capability query message from a network device. The communication method also includes reporting capability information of a terminal device to the network device. The capability information includes an indication information set of N band set pairs, where N is a positive integer. Each piece of indication information in the indication information set is associated with one band set pair. The indication information indicates switching of a transmission branch performed by the terminal device between two band sets in the band set pair. The band set includes at least one of L bands in the band set pair, where L is an integer greater than or equal to 3.

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.

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