171 results about "Wave structure" patented technology

The invention belongs to the technical field of ocean engineering, and particularly relates to a potential flow-viscous flow real-time coupling hydrodynamic analysis method and system for a floating body with a heaving plate. The method comprises the following steps of: 1, establishing a free surface potential flow model based on a three-dimensional potential flow theory, simulating wave-structure interaction, ignoring a viscous effect, converting a frequency domain result of a hydrodynamic load into a time domain load through a frequency-to-hour method, and taking the time domain load as an input for solving a motion state; 2, establishing an unbounded viscous flow CFD model, viscous force not covered by a potential flow model and an updated unbounded turbulent flow field around the heaving plate, and calculating the viscous force of the heaving plate; 3, establishing an unbounded potential flow model, and separating a force component repeated with the potential flow from a viscous flow result; 4, integrating the potential flow force and the viscous force to solve a floating body motion equation, iteratively updating the motion state and feeding back the motion state to the two solvers. The method is used for solving the problems that the efficiency is correspondingly reduced if the precision is improved and the precision cannot meet the requirement if the efficiency is improved in the prior art.

The invention discloses a reinforced photoelectric composite cable of a coal mining machine, which belongs to the technical field of cables, and comprises a composite cable core structure, an armored protective layer and a sheath system, and the armored protective layer comprises a first steel belt, a second steel belt and a metal net braid layer, a third steel belt which is continuously bent to be of a wave structure is arranged in a cavity formed by the first steel belt and the second steel belt, the wave troughs of the third steel belt make contact with the inner wall of the first steel belt, and the wave crests of the third steel belt make contact with the inner wall of the second steel belt. The cable can be subjected to multi-dimensional mechanical property collaborative optimization under complex working conditions, the purpose of graded unloading is achieved through deformation of the steel plate, the situation that a traditional structure generally depends on rigid resistance of an armor layer is not needed, the flexibility is considered while the mechanical property is guaranteed, and the cable adapts to frequent bending scenes; and the long-term stable operation of the cable in a severe mine environment is further ensured.

The invention discloses an elastic Bragg breakwater structure response prediction method, and belongs to the technical field of ocean engineering structure dynamic response prediction, and the method comprises the steps: obtaining the front and rear wave surface elevation and motion response data of a breakwater; a double-flow attention mechanism based on physical prior guidance is constructed, and wave-structure interaction is decoupled into two parallel attention flows of structural dynamic evolution and wave-structure coupling feedback; a self-attention mechanism is combined with a time decay physical prior coding structure motion feature, and a bidirectional cross attention mechanism based on a resonance characteristic is combined with a wave-structure phase relation physical prior coding coupling feature; the double-flow features are adaptively integrated through a global context fusion module, and a multi-step prediction sequence is output through linear layer decoding; and a time-frequency domain joint loss function optimization model is adopted, so that the prediction precision is improved. According to the method, physical prior is explicitly embedded into an attention mechanism and is improved by more than 16% compared with an optimal baseline model, and the generalization ability is enhanced by more than 13% under the working condition that waves do not appear.

The utility model relates to the technical field of vacuum electronics, in particular to a trapezoidal staggered gate slow-wave structure of a circular electron beam channel, which comprises a metal shell, trapezoidal upper metal gates and trapezoidal lower metal gates which are symmetrically arranged in a staggered manner are arranged in the metal shell, and the upper metal gates and the lower metal gates are respectively provided with arc-shaped concave holes; along the electron transmission direction, the concave holes respectively penetrate through the upper metal gate and the lower metal gate, and the upper and lower concave holes are enclosed to form a circular electron beam channel. Through the slow-wave structure, the bandwidth of the slow-wave structure can be increased, so that the longitudinal electric field in the slow-wave structure is enhanced.

The utility model discloses a kind of based on three-layer separation's multiphase separator, including tank, its one side is equipped with air inlet, the top of the tank is equipped with exhaust port, and the bottom of the tank is equipped with drain and oil outlet respectively;Inlet baffle, the inlet baffle is set in the tank and is close to the one end of the air inlet;Rectifier, it is installed in the tank top;Overflow partition, it is vertically installed in the tank, and with the tank top clearance is kept, forms a overflow port;Anti-wave structure, it includes multiple anti-wave board, driving part and flow control part, multiple the anti-wave board equidistant installation in the tank, and the driving part is set in the tank outside, and its output end extends to the tank inside.The utility model plays the beneficial effect of: solve the technical problem that the hole diameter of hole on anti-wave board in three-phase separator in prior art cannot be adaptively adjusted, resulting in finally affecting the technical problem of equipment oil outlet effect.

The invention provides a permeable breakwater and a design method thereof, and relates to the technical field of permeable breakwater. Aiming at the lack of a design method for high-precision environment coupling and high-accuracy structure stress prediction during design of a permeable breakwater in the prior art, the method comprises the following steps: establishing a wave-structure-foundation coupling model based on structure stress data, environment soil characteristics and a transmission coefficient of waves; s5, selecting a wave-structure-foundation coupling model, simulating different structure parameter combinations based on the wave-structure-foundation coupling model, and when the simulation results do not meet the target requirements, circularly executing the steps S2 to S5 until the simulation results meeting the target requirements are screened out, and determining a corresponding final structure parameter combination. The cooperative working mechanism of the reduction foundation and the pile foundation is realized, the dynamic interaction of the wave load and the structural response is simulated, and the environmental coupling precision and the structural stress prediction accuracy are improved.

A filter material for manufacturing a segment of a smoking article is described. The filter material includes a hydro-entangled nonwoven, which includes fibers. The fibers are selected from the group consisting of pulp fibers, fibers of regenerated cellulose and mixtures thereof. These fibers are contained in the nonwoven in an amount of 50% to 100% of the mass of the hydro-entangled nonwoven. The nonwoven is in the form of a web, has a longitudinal direction in the running direction of the web, a cross direction orthogonal thereto and lying in the plane of the web and a thickness direction orthogonal to longitudinal direction and the cross direction. The nonwoven is shaped to have a wave structure in the plane formed by the cross direction and the thickness direction with a wave height from 50 μm to 1000 μm and a wave length from 150 μm to 5000 μm.

The utility model discloses an anti-slip dilatation balloon, which relates to the technical field of medical balloons, and comprises a sheath tube, a balloon and a soft head, the balloon is fixed between the sheath tube and the soft head, the two ends of the balloon are respectively and fixedly connected with the sheath tube and the soft head, fiber lines are arranged on the surface of the balloon, the fiber lines are divided into transverse limit lines and longitudinal limit lines, and the transverse limit lines and the longitudinal limit lines are connected with the soft head. The balloon is provided with the fragrance line which enables the balloon to deform, so that the balloon has good anti-falling and anti-skidding effects when the balloon is used for expanding a channel, the balloon is prevented from sliding off and moving, the expansion effect is prevented from being affected, gas on the two sides of the balloon can circulate, and the balloon is prevented from falling off and sliding off when the balloon is used for expanding the channel. The air pressure difference between the two sides of the expansion channel is eliminated, pain of a patient is reduced, the balloon can serve as a mark of the insertion depth and slippage, and medical staff can judge conveniently.

This application provides a collector, a traveling wave tube (TWT), and an electronic device, relating to the field of TWT technology. The TWT includes a slow-wave structure and a collector; the end of the slow-wave structure includes a transition channel corresponding to the electron beam; the collector includes multiple stages of sequentially stepped-down electrodes; the end of the first stage electrode in the multiple stages of sequentially stepped-down electrodes is located within the transition channel; or, the end of the first stage electrode is inclined towards the cavity of the collector at a first tilt angle along the axis of the electron beam, the first tilt angle being determined according to the velocity of the electron beam. The technical solution provided by the embodiments of this application enables the collector to simultaneously achieve both low peak backflow rate and high efficiency of deep backflow collectors.

The utility model provides a comfortable back -carrying type hair dryer with damping structure, include: hair dryer body, hair dryer body one side is equipped with backplate support, backplate support one side fixed mounting has damping component, and damping component includes U shaped elastic sheet, and U shaped elastic sheet fixed mounting is in backplate support one side, and U shaped elastic sheet one side surface is equipped with two empty grooves, and two empty grooves are all respectively pasted with silica gel block in, and silica gel block one side is respectively pasted with soft cotton board. When the user carries the hair dryer body through the shoulder strap, the body pressure is passed to the silica gel block through the soft cotton board, and the high elasticity deformation of silica gel absorbs high frequency fine vibration, and the wave plate is located between two soft cotton boards, and the wave structure of the wave plate produces deformation when being pressed, and the dispersion pressure increases the buffer stroke, improves the comfort degree when the user is carrying.

The invention discloses an integrated solar module system suitable for multi-scene installation, relates to the technical field of solar modules, and aims to solve the technical problem that for complex installation base planes such as arched roofs and wave structures, the traditional installation mode is difficult to adjust the angle in a self-adaptive manner. Comprising a solar panel and installation mechanisms arranged on the two sides of the solar panel, and each installation mechanism comprises insertion installation assemblies symmetrically arranged on the two sides of the solar panel. Through a gathering or unfolding mechanism of the clamping plates and a wedge-shaped guide structure, the adjacent solar panels can be simply in butt joint like splicing and inserting building blocks, and the problem that traditional installation is tedious and time-consuming is solved; the series connection locking module can effectively prevent loosening, and the external force performance such as wind resistance of the whole structure is enhanced; and the multi-direction hinging module endows the solar panel with the capabilities of axial rotation and inclination angle adjustment, so that the solar panel can adapt to mounting base planes with different curvatures, such as arched roofs and wave structures, and the application potential of the solar panel in diversified building scenes is greatly expanded.

A folding cascade design is adopted, a single-section amplification process of a traditional slow wave structure is decomposed into a plurality of continuously cascaded amplification stages, namely slow wave sub-structures, each stage is provided with an independent electron beam for driving, an output signal of a front stage is directly fed into a rear stage to serve as input, and the output signal of the rear stage is directly fed into the slow wave sub-structures. In this way, step-by-step transmission and amplification of signals are achieved, high-efficiency sectional signal amplification is achieved, and the working bandwidth and output power of an original structure are not damaged while the interaction length of the slow wave structure is effectively shortened. In order to optimize the layout and reduce the structural size, the signal propagation directions of two adjacent stages are arranged in opposite directions, so that the output end of the front stage is directly aligned with the input end of the rear stage in space, and a compact folding topological structure is formed. Efficient signal transmission between stages is realized through the coupler and the waveguide, and the whole slow wave structure only reserves one input port and one output port, so that the integration level is remarkably improved, the manufacturing complexity is not increased, and meanwhile, the performance of an output signal is not deteriorated. And the electron beams are emitted along the signal transmission direction of each stage, so that the electron beams of two adjacent stages are arranged in a staggered manner in space.

The invention discloses a three-notch high-rectangularity dielectric filter which comprises a ceramic dielectric body, an input interface arranged at the first end of the ceramic dielectric body and an output interface arranged at the second end of the ceramic dielectric body. A first resonance hole, a second resonance hole, a first trapped wave structure, a second trapped wave structure and a third trapped wave structure are sequentially arranged on the ceramic dielectric body from a first end to a second end, and the first resonance hole and the second resonance hole are blind holes; the first resonance hole is connected with the input interface to form an input resonator, and the third notch structure is connected with the output interface; and metal shielding layers are formed on the surfaces of the ceramic dielectric body, the resonance holes and the notch structures through metallization processing. According to the invention, through the structural design of the first trapped wave structure, the second trapped wave structure and the third trapped wave structure, the three-trapped wave function can be well realized.

The invention discloses an oil and gas pipeline dredging flexible shaft cleaning device, which relates to the technical field of pipeline dredging, and comprises a spray head main body, a connector, an end cover and a guide piece, and the guide piece is connected to the spray head main body and is glidingly embedded with a guide groove on a rotating part of the connector. The connector is rotationally sleeved with the spray head body, so that the connector enables water flow to enter the water flow channel through the water outlet through the water outlet channel, the water flow is sprayed out from the multiple nozzles obliquely arranged in the circumferential direction, and the spray head body rotates on the connector; by means of a guide groove which is formed in the rotating part of the connector and is of an annular wave structure and a guide piece which is connected to the spray head body and embedded into the guide groove, the spray head body can do reciprocating motion in the axial direction of the connector in the rotating process, so that scales and deposits located on the inner wall of the oil and gas pipeline are rotationally impacted; the dredging efficiency of the oil-gas pipeline is effectively improved.

The embodiment of the present application discloses a kind of travelling wave tube slow wave structure welding mould, including the welding upper die and welding lower die of opposite arrangement;Positioning cylinder between the welding upper die and welding lower die;And the centering rod that passes through the welding upper die and welding lower die;The welding upper die and welding lower die are connected by screw rod and form welding support, two ends of the positioning cylinder are respectively with the welding upper die and welding lower die abut, the centering rod is located in the inner cavity of the positioning cylinder;To be welded slow wave structure is contained in the inner cavity of positioning cylinder, the centering rod includes first centering rod and second centering rod, the first centering rod is arranged in the electron beam passage of to be welded slow wave structure, and the second centering rod is arranged in the pin hole of to be welded slow wave structure.The improvement of slow wave structure degree, perpendicularity is realized, and the pipe body horizontal direction torsion is reduced, and the flow rate of further high-power travelling wave tube and yield rate are improved.

The invention relates to the technical field of vacuum electronics, and discloses a large-radius spiral waveguide slow wave device (including a traveling wave tube and a backward wave tube). The high-frequency structure of the novel slow-wave device is a two-dimensional periodic slow-wave structure formed by spirally winding a rectangular waveguide along a large-radius cylindrical surface. The transverse size of an electron beam channel can be greatly increased by increasing the spiral radius, so that higher injection electron beam power (under the same current density) is provided, and the output power is greatly improved. Compared with an existing slow-wave device, the large-radius spiral waveguide slow-wave device has the advantages that the output power can be greatly improved (in magnitude), and the bottleneck that the power of an existing vacuum electronic slow-wave device is limited can be broken through.

The invention relates to the technical field of forward wave oscillators, in particular to a K-band TE11 mode microwave oscillator. Comprising a cylindrical waveguide, and sequentially comprises a cut-off transition section, an interaction section and an output transition section, the cathode structure is mounted in the cut-off transition section; the anode waveguide structure comprises a plurality of slotted circular ring metamaterial units which are arranged in the interaction section at intervals in the axial direction, are linked through a metal cylinder to form a serial structure and are connected to the wall of the cylindrical waveguide to form a double-spiral anode slow wave structure; electron beams generated by the cathode structure rotate in the axial direction under the action of an external electromagnetic field, interact with each other in the anode slow wave structure to excite forward waves in a TE11 mode, and radiate outwards along an output transition section; the collector is arranged in the output transition section. On the basis of realizing a Gaussian beam TE11 mode, a traditional mode conversion structure is omitted, the structure is more compact, and light weight and miniaturization are easy to realize.

This invention discloses a slow-wave structure and circuit suitable for high-order modes, including a housing, an upper gate extending from the top wall to the bottom wall of the housing, and a lower gate extending from the bottom wall to the top wall of the housing. Multiple upper and lower gates are staggered, defining multiple periodic vacuum cavities. The upper and lower gates have different heights along the height direction of the slow-wave structure. An electron beam channel is formed between the upper and lower gates. This invention can suppress low-order mode competition and back-wave oscillations at low operating voltages, achieving stable operation in high-order modes and achieving high output power of 100W or more with low voltage.

The document provides optical elements, optical systems, and image acquisition devices. One or more optical elements may include a substrate and a wave structure formed on the substrate, the wave structure including a first antireflective film having one or more layers formed opposite to the substrate and a plurality of wave regions, each wave region including a plurality of structures. A predetermined inequality is satisfied.

Provided in the present application are a traveling-wave tube, a transmitter, an electronic device and a signal processing method. The traveling-wave tube comprises an input apparatus, an electron emission apparatus, a plurality of slow-wave structures and an output apparatus, wherein at least one transmission channel is formed in the plurality of slow-wave structures, and the number of transmission channels is less than the number of slow-wave structures; the input apparatus is used for receiving a plurality of radio-frequency signals and feeding the plurality of radio-frequency signals into the plurality of slow-wave structures; the electron emission apparatus is used for emitting an electron beam into the at least one transmission channel of the plurality of slow-wave structures; the plurality of slow-wave structures are used for respectively receiving the plurality of radio-frequency signals, and using the electron beam to respectively amplify the plurality of radio-frequency signals, so as to obtain a plurality of amplified radio-frequency signals; and the output apparatus is used for outputting the plurality of amplified radio-frequency signals. The present application can reduce the volume of a traveling-wave tube, thereby decreasing the cost of the traveling-wave tube.

The utility model relates to the technical field of finned tubes, and discloses a high-strength finned tube which comprises an inner tube and a spiral plate, the spiral plate is arranged outside the inner tube in a spiral mode and is concentric with the inner tube, an outer tube is connected outside the inner tube, the spiral plate comprises an inner ring and an outer ring, the inner wall of the inner ring is connected with the outer wall of the outer tube, the outer ring is of a spiral structure, and the outer ring is connected with the outer tube. The inner wall of the inner ring is of a wave structure with the outer ring as the center for guiding, the outer wall of the inner ring is connected with the outer ring, a flange connecting assembly is arranged on the outer pipe, and a sealing assembly is arranged on the inner pipe. Compared with the prior art, the spiral plate has the advantages that the supporting strength of the spiral plate is enhanced conveniently, deformation of the spiral plate is prevented, heat exchange is improved conveniently, and maintenance is facilitated.

The utility model relates to the field of crushing, in particular to a raw material crushing device for liquid dressing production, which comprises a shell, a filter screen is fixedly connected in the shell, and a guide plate with a wave structure is fixedly connected on the inner wall of the shell far away from a limit opening. The side, close to the limiting opening, of the shell is fixedly connected with a limiting frame, a transmission frame is slidably connected into the limiting frame, the side, close to the shell, of the transmission frame is fixedly connected with a limiting rod, and the side, close to the limiting rod, of the transmission frame is fixedly connected with a spring through a plate body. According to the raw material crushing device for liquid dressing production, the problem that raw material particles on the filter screen are stacked together, and consequently the screening work of the raw material particles is greatly affected is solved; and the auxiliary performance of the device during raw material particle screening is effectively improved.

A vapor chamber system may include a vapor chamber and a heat spreader disposed on the vapor chamber. The heat spreader may include a surface facing the vapor chamber. The surface may include one or more protrusions extending toward the vapor chamber. The protrusions may be configured to thermally couple the heat spreader to the vapor chamber. The protrusions may be conical or may comprise elongated wave structures including alternating upper and lower portions forming a corrugated pattern. The protrusions may define cavities between the heat spreader and the vapor chamber configured to direct airflow for enhanced heat dissipation. The vapor chamber may include upper and lower vapor chamber layers defining a vapor zone therebetween, with support pillars extending between the layers. The protrusions may be aligned with the support pillars for structural enhancement and thermal conduction.

The invention discloses a heat exchanger fin, a heat exchanger and refrigeration equipment, and relates to the technical field of heat exchangers, and the heat exchanger fin (1) comprises a wave structure extending in the transverse direction of the heat exchanger fin (1); the wave structure comprises a plurality of alternately distributed wave crest sections (11), wave trough sections (12) and side walls (13) for connecting the adjacent wave crest sections (11) and wave trough sections (12), first side wall structures (131) of the side walls (13) are connected with the wave crest sections (11), second side wall structures (132) of the side walls (13) are connected with the wave trough sections (12), and the length of the first side wall structures (131) in the longitudinal direction is equal to the length of the second side wall structures (132) in the longitudinal direction; the curvature of the first side wall structure (131) in the longitudinal direction is gradually reduced, and the curvature of the second side wall structure (132) in the longitudinal direction is gradually increased. Through the heat exchanger fin, the heat exchange efficiency of the heat exchanger fin can be improved.

The application relates to the technical field of organ chip, and discloses a biocompatible membrane sheet, which comprises wave structures continuously distributed in one direction, and the wave structures are in a hollow structure. The biocompatible membrane sheet disclosed by the application has consistent hollow wrinkle forms, uniform deformation when the biocompatible membrane sheet is subjected to external force, better transmission and fluctuation, and can more truly reproduce the dynamic change state of an organ in vitro. The application further discloses an organ chip, an intestinal organ chip, an intestinal organ chip system, a membrane sheet preparation method, an intestinal organ chip preparation method and an intestinal barrier construction method.

The invention discloses a dual-polarized waveguide slot planar antenna array, which comprises a first waveguide power division network assembly, a second waveguide power division network assembly, a third waveguide power division network assembly, a radiation cavity assembly and a radiation slot assembly which are sequentially overlapped and connected from bottom to top. The first waveguide power division network assembly, the second waveguide power division network assembly, the third waveguide power division network assembly and the radiation cavity assembly realize electromagnetic energy transmission through slot coupling. The radiation slot assembly is located at the uppermost part of the antenna, comprises a cross-shaped radiation slot which is stacked up and down, and is used for radiating the electromagnetic energy in the radiation cavity to a free space. The whole antenna array is of a low-profile flat plate structure, the size is compact, dual-polarization radiation of the antenna is achieved in the same radiation aperture, an all-metal guided wave structure can be adopted, and reduction of antenna loss is facilitated.

A high-strength rake plate of an agricultural machine belongs to the technical field of large agricultural harvesters and comprises a rake plate body with a U-shaped side section, the middle of the front end of the rake plate body extends downwards to form a protruding portion, the top of the front end of the rake plate body is intermittently provided with an arc wave structure, and a plurality of reinforcing ribs are evenly distributed in the rake plate body. A plurality of round holes are formed in the two sides of the interior of the rake plate body. The structure strength of the harrow plate body can be greatly enhanced, the service life is prolonged, and the use requirement of a large harvester is met. Meanwhile, the structure is symmetrical, the layout is reasonable, and the uniformity of stress and the compactness of the structure can be enhanced. The manufacturing method preferably adopts die casting and surface strengthening treatment, so that the wear resistance can be effectively improved.

This invention provides a folded waveguide slow-wave structure, a traveling wave tube, and a design method. The folded waveguide slow-wave structure includes multiple folded waveguide units of a periodic structure and an electron beam channel. Each folded waveguide unit includes a straight waveguide segment and a waveguide connection segment. In the direction from the electron beam channel towards the waveguide connection segment, adjacent straight waveguide segments are arranged obliquely and symmetrically. The angle formed by the axes of adjacent straight waveguide segments is α; 10°≤α≤60°. This folded waveguide slow-wave structure can reduce dispersion variation while maintaining a certain coupling impedance, effectively improving the device bandwidth.

The application discloses an improved trapezoidal line slow wave structure and a traveling wave tube. The slow wave structure comprises a straight waveguide section, the straight waveguide section comprises a first coupling groove, a second coupling groove and an electron beam channel located in the middle of the first coupling groove and the second coupling groove along the direction of the central axis of the straight waveguide section; the width of the first coupling groove and the second coupling groove alternately changes on two adjacent metal plates of the slow wave structure, the transmission path of electromagnetic waves in the slow wave structure is prolonged, the phase velocity of electromagnetic waves in the slow wave structure is reduced, and then the bandwidth is extended. The traveling wave tube comprises the improved trapezoidal line slow wave structure. The application has the advantages of easy processing, good heat dissipation, wider bandwidth, higher coupling impedance and lower ohmic loss in the terahertz wave band, and solves the problems of narrow bandwidth, lower coupling impedance and larger loss of the traditional trapezoidal line slow wave structure.

An ankle protector is provided. The ankle protector includes an outside guard comprises an outer surface. The outer surface defines a plurality of irregular channels. Each irregular channel of the plurality of irregular channel has a wave structure.