170 results about "Vertical array" patented technology

The invention discloses a sparse Bayesian learning shallow sea target depth and horizontal distance passive estimation method, and the method comprises the steps: calculating a modulus depth function hypothesis space through employing a finite difference method based on a prior sound velocity profile and a horizontal wavenumber hypothesis interval; preprocessing the vertical array data to a frequency domain, constructing a linear underdetermined equation set about the frequency domain vertical array data and a modulus depth function of a hypothesis space under sparse constraint, and solving by using a sparse Bayesian learning algorithm to obtain estimation of a horizontal wave number spectrum; performing spectrum peak search on the horizontal wave number spectrum, estimating the order and the horizontal wave number of an actual excitation mode, and estimating a mode depth function of each order of mode by using a finite difference method; vertical array copy sound fields under different depths and horizontal distances are calculated according to a normal wave sound field formula; and respectively performing conjugate transpose multiplication on the vertical array copy sound field and actual data to obtain a depth-horizontal distance ambiguity surface, and searching the position of the maximum surface value as the estimation of the depth and horizontal distance of the source.

The invention discloses an electrochemical descaling device for circulating water, and mainly relates to the field of water treatment. Comprising a descaling box, a water inlet pipe and a water outlet pipe are arranged on the descaling box, a deslagging pipe is arranged at the bottom of the descaling box, a plurality of cathode plates are distributed in the descaling box in a vertical array mode, anode plates are arranged between the adjacent cathode plates, passing openings are formed in the cathode plates and the anode plates, cavities are formed in the cathode plates, and moving plates are slidably connected in the cavities in the vertical direction; a plurality of deposition holes are symmetrically formed in the upper side and the lower side of the negative plate, a plurality of deposition columns are symmetrically arranged on the upper side and the lower side of the movable plate, an outer shaft body for driving the multiple movable plates to slide up and down at the same time is arranged in the descaling box, and scraping plates are symmetrically and rotationally connected to the upper side and the lower side of the negative plate. The cathode structure has the beneficial effects that the technical problem that an existing cathode structure is high in cleaning frequency or difficult to clean can be solved, the cleaning frequency is reduced, cleaning is more convenient and thorough, and the electrochemical descaling effect after long-term use is guaranteed.

The invention provides a water surface / underwater target distinguishing method and system based on normal wave limited energy under an ice region half-sound channel, and the method comprises the steps: converting a time domain signal received by a vertical array in an ice region sea area into a frequency domain, and obtaining the frequency domain data of an array receiving signal; simulating and forecasting a normal wave modal depth function, a horizontal wave number and a phase velocity of the test sea area by using the normal wave model; extracting a normal wave modal amplitude which can be distinguished by test measured data; comparing the sound velocity of the phase velocity with the sound velocity of the critical resolution depth to obtain an order index of the limited mode; calculating the energy of a data extraction result limiting mode as a binary detection statistic; and setting a detection threshold according to the ROC curve, and if the limited modal energy is smaller than the detection threshold, determining that the target is an underwater target. Otherwise, determining the target as a water surface target. Compared with a traditional matching field and matching mode method, the method is small in calculation amount, high in environment tolerance and easy to popularize in an actual sonar platform.

The utility model relates to the field of charging devices, and discloses a new energy automobile charging device which comprises an installation barrel, a plurality of clamping grooves are vertically formed in the outer wall of the installation barrel in an array mode, a chassis is fixedly connected to the bottom of the installation barrel, and a rectangular hole is formed in the outer wall of the installation barrel in a penetrating mode. A clamping groove is formed in the top of the mounting barrel, two through holes are symmetrically formed in the inner wall of the clamping groove, a supporting rod is inserted into the top of the mounting barrel, a top cover is fixedly connected to the top end of the supporting rod, two perforated connecting plates are symmetrically and fixedly connected to the outer wall of the mounting barrel, and pull rods are slidably connected to the tops of the two perforated connecting plates in a penetrating mode. The mounting barrel is simple to use, a plurality of charging wires connected with automobile charging equipment can extend out of the through holes and are wound and clamped in the clamping grooves for storage, and the charging wires can also extend out of the circular holes formed in the shielding cover and the rectangular holes for use, so that the charging requirements of a large number of automobiles can be met by arranging a plurality of charging interfaces on the same mounting barrel; and the occupied area is reduced.

The invention relates to the technical field of dispersing devices, and discloses a rare earth mixture mixing and roasting process and dispersing and grinding equipment thereof.The rare earth mixture mixing and roasting process comprises a dispersing barrel used for dispersing and mixing, a stirring rod is arranged at the axis of the dispersing barrel, and stirring blades used for dispersing and stirring are vertically arrayed on the stirring rod; a discharging port allowing processed raw materials to pass through is formed in the lower portion in the dispersing barrel, at least one partition assembly is arranged in the dispersing barrel and composed of a fixed piece and a rotating piece, the partition assembly is attached to the inner wall of the dispersing barrel and divides the interior of the dispersing barrel into at least two independent spaces, groove holes are formed in the fixed piece and the rotating piece, and the fixed piece fixes the angle. The rotating piece is connected with the stirring rod and is driven by the motor to rotate along with the stirring rod, when the stirring rod rotates, the slotted hole in the fixed piece is blocked by the rotating piece to form a gap with variable size, the gap is in a closed state at a specific rotating angle, and an ultrasonic device is arranged at the bottom in the dispersing barrel and can emit upward ultrasonic waves.

The invention discloses a method for detecting radiation characteristics of a to-be-detected target in a shallow sea waveguide environment, which comprises the following steps of: 1, extracting real normal wave modal parameters of a sound source radiation signal in the shallow sea waveguide environment through an orthogonal constraint modal search method according to data received by a vertical array; 2, according to the real normal wave modal parameters, through a normal wave expression in a waveguide environment, performing inversion to obtain a sound field of the whole shallow sea waveguide; and step 3, acquiring sound field information required in the sound field of the shallow sea waveguide, mapping the sound source information into the free space by using the reciprocity theorem, realizing sound field migration from the shallow sea waveguide to the free space, and further acquiring the radiation characteristics of the target to be measured in the free space. The method is used for obtaining the radiation characteristics of the to-be-measured target in the free space according to the data received by the vertical array.

The invention belongs to the technical field of underwater target detection, and discloses an underwater target depth coherent estimation method and system, and the method comprises the steps: receiving a single snapshot signal radiated by a target through a sensor array carried by an underwater carrier, and constructing a potential normal wave orthogonal mode space of a sound field under the condition that a sound velocity profile is known, estimating normal wave parameters (namely normal wave horizontal wave number and vertical modal function) and depth-related modal characteristics (namely modal amplitude) by using the sparsity of the sound field projected in the orthogonal modal space as a constraint, and coherently estimating the depth of the underwater target by using a modal polarity-based search method. According to the method, target depth coherent estimation is realized in a marine environment with unknown seabed sediment by using a single frequency component in a single snapshot noise signal radiated by the target, the accuracy of polarity estimation is improved by using a theoretical depth ambiguity function learned by the KAN network, and the method can be used for underwater target positioning, identification and the like. The method is suitable for carrier platforms such as vertical array subsurface buoys and vertical array buoys.

The invention provides a sparse Bayesian learning-based matched broadband modal phase velocity inversion earth sound parameter method and system, and the method comprises the steps: extracting a local mode through employing a receiving signal of a vertical array, and removing the narrowband limitation of block sparse Bayesian; the broadband modal phase velocity is used for matching inversion of the earth sound parameters, and decoupling of the earth sound parameters is achieved. The method has the advantages that seabed parameters do not need to be known priori, the depth range of the extraction mode is not limited by the aperture of the VLA, and the method can be applied to a non-uniform vertical array; when the earth sound parameters are inversed, the earth sound parameters are not influenced by the terrain on the propagation path, and the earth sound parameters of any terrain can be inversed; known sound source position information is not needed, and the problem of inaccurate inversion result caused by inaccurate sound source position is avoided; and meanwhile, multi-distance sound source signals are used for inversion, so that the inversion of the earth sound parameters is more robust and accurate.

The utility model discloses a stem cell culture device which comprises a box body, sliding grooves, culture drawers, inserting rods and heat insulation plates, the four heat insulation plates are fixedly installed on the inner side of the box body in a vertical array mode, culture bins are formed in the top end of the inner side of the box body and between every two adjacent heat insulation plates, and the sliding grooves are formed in the inner side walls of the culture bins; the sliding grooves of every two adjacent culture bins are perpendicular to each other, sliding strips are fixedly installed on the left side wall and the right side wall of each culture drawer, a handle is fixedly installed in the center of the outer side wall of each culture drawer, the sliding strips are transversely and slidably connected with the inner sides of the sliding grooves, and a plurality of fixing holes are evenly formed in the bottom of the inner side of each culture drawer. The side wall of the culture bin is communicated with a ventilation pipe, and the other end of the ventilation pipe is communicated with the ventilation chamber; according to the stem cell culture device, the independent culture drawer is arranged for taking and placing, so that culture of other stem cells is not delayed, and the culture efficiency of the device is improved.

The invention belongs to the technical field of signal and information processing, relates to a modal time delay compensation continuous sound signal target depth estimation method based on a linear array, and is suitable for sonar signal processing. According to the method, on the basis of F-K transformation, through fitting of a sound velocity profile, compensation of modal time delay of each order of each array element, separation of modal of each order in an array receiving signal and a frequency-wavenumber domain, and design of a theoretical curve binary mask filter, modal energy of each order is extracted to be matched with a search depth; and depth estimation of a continuous sound signal target under a general sound velocity profile condition is realized. According to the invention, the depth estimation of a continuous sound signal target is realized, and the problems that a vertical array is difficult to maintain in engineering practice, modal aliasing exists in a continuous signal time-frequency domain by a single hydrophone, and the depth estimation precision error of a depth estimation method under a general sound velocity profile condition is large are solved.

The invention provides a normal wave frequency dispersion mode decomposition and sound source depth estimation method and system. The method comprises the following steps: S1, obtaining a vertical array space-frequency domain signal; s2, obtaining a parameterized model of each order of airspace; s3, obtaining a frequency domain parameterized model; s4, jointly establishing a space-frequency parameterization superposition model of the space-frequency domain signals of the vertical array; s5, optimizing and solving the space-frequency parameter matrix of each order; s6, reconstructing each order of space modal function and each order of frequency dispersion modal response; and S7, constructing a sound source depth estimation index, and performing optimization solution to obtain a sound source depth value. According to the method, parameterized joint modeling is carried out on the spatial modal function and the frequency domain modal response, a complex normal wave frequency dispersion mode can be jointly decomposed in the spatial domain and the frequency domain at the same time, meanwhile, the spatial modal function and the frequency domain modal response of each order are obtained through reconstruction, and compared with a traditional single-frequency-point modal decomposition method and the like, the method has the advantage that the method is more efficient. Rich information of normal waves in space and frequency dimensions can be better utilized, and the modal decomposition effect is better.

The utility model discloses an ozone water cup with vertical array electrodes. An ozone device comprises an ozone generating unit and a working power supply unit for supplying power to the ozone generating unit, the ozone generating unit comprises an ozone base arranged in the mounting cavity, an ozone generating cavity structure is formed on the ozone base, an ozone generating cavity is communicated with the ozone cup body, and a plurality of groups of electrode plates for generating an ozone effect are arranged in the ozone generating cavity; each group of electrode plates is divided into anode plates and cathode plates according to electric polarity, the anode plates and the cathode plates are vertically arranged at intervals, and the cathode plates are arranged on the two sides of the anode plates; the ozone device adopts a vertically arranged anode plate and cathode plate structure, so that the effective contact area between an electrode plate (ozone) and water can be effectively increased, the working efficiency can be effectively improved, an ozone water cup can obtain ozone water with enough high concentration in a very short time, the ozone water is used for gargling and cleaning the oral cavity, the oral cavity can be effectively disinfected, and the service life of the ozone water cup is prolonged. Oral bacteria are killed, oral cavity, periodontal and gingivitis are inhibited, and oral malodor is eliminated.

The invention discloses a low-noise ribbon vertical array based on vertical vibration isolation mixed vortex breaking analysis. According to the invention, the specially designed vibration isolation section is arranged to isolate the wind wave flow impact vibration of the hydrophone vertical receiving array in the tension mooring state; the hydrophone vertical receiving array receives underwater acoustic signals under the sea depth condition in a mode of combining a carrier cable vulcanization hydrophone and a multi-array-element oil-filled receiving array section. Meanwhile, the upper vertical mixing section and the lower vertical mixing section are woven through fixed-width woven polyester ribbons with high flexibility, alternating vortex breaking can be effectively formed after the cylinders flow around, and therefore transverse flow-induced vibration of the cylinders is effectively reduced. The low-frequency vibration frequency of the vertical array provided by the invention under the action of typical ocean current is about 9Hz, the vertical vibration isolation capability is below 50Hz and reaches more than 20dB, and the horizontal flow-induced noise suppression capability reaches more than 10dB, so that high-quality acquisition of acoustic data in a large depth range is realized.

The present invention relates to the technical field of aluminum electrolysis material suction cranes, in particular to a multi-functional aluminum electrolysis material suction crane unit, including a trolley mechanism, which includes a trolley bottom plate and a storage tank arranged above the trolley bottom plate. A discharge pipe is fixedly arranged on the bottom surface of the storage tank; a material conveying mechanism arranged below the trolley bottom plate, which includes a plurality of telescopic pipes arranged in a vertical array, steel wire ropes symmetrically arranged on both sides of the telescopic pipes, and a winding roller arranged on one side of the upper end of the telescopic pipe group. Among two adjacent telescopic pipes, the upper end of the telescopic pipe located below is slidably sleeved in the telescopic pipe located above; and a discharging and suction mechanism arranged below the material conveying mechanism, which includes a discharging and suction hopper, a corrugated sleeve and a traction assembly arranged in sequence from bottom to top. This suction crane can effectively adsorb the piled materials, the overall design is reasonable, and it can effectively avoid the raw materials from splashing in the electrolytic cell during feeding, improving the working environment.

The invention discloses a deep ion nitriding process for a gear with high bearing capacity, relates to the related field of gear processing, and aims to solve the problems of different nitriding degrees of different parts of the gear and unstable nitriding quality of the gear due to non-uniform distribution after ammonia gas is introduced in the prior art. When the furnace temperature rises to the nitriding temperature, ammonia gas is introduced into the furnace through an ammonia gas introduction pipe and an ammonia gas discharge pipe, the ammonia gas spirally flows upwards and is discharged along the side wall due to the existence of a first spiral channel and a second spiral channel in the ammonia gas discharge pipe, and the ammonia gas is disturbed through a rotating structure; an ammonia gas discharge pipe is rotationally sealed at the upper end in the ammonia gas introduction pipe, a double-helix part is fixed in the ammonia gas discharge pipe, a gas exhaust hole is formed in the pipe wall of the ammonia gas discharge pipe, a self-rotating fan is rotationally connected to the outside of the ammonia gas discharge pipe and comprises rotating fan blades, and the rotating fan blades horizontally correspond to the gas exhaust hole in position; and horizontal rotating fans are vertically fixed outside the ammonia gas discharge pipe in an array manner.

The utility model relates to the technical field of evaporation crystallizers, in particular to an external heating type reverse circulation evaporation crystallizer which comprises a heating chamber, an evaporation chamber, a confluence chamber and a feeding port, the heating chamber comprises a base, a pump machine, a heating pipe and a sealing cover, and the top of the heating chamber is connected with the evaporation chamber through a connecting pipe. The bottom of the evaporation chamber is connected with the top of the confluence chamber through a pipeline, the feeding port is formed in one end of the confluence chamber, the other end of the confluence chamber is connected with the bottom of the heating chamber through a pipeline, the base is arranged at the bottom of the heating chamber, the pump machine is installed at one end of the base, the heating pipes are vertically arranged in the heating chamber in an array mode, and the sealing cover is installed at the top of the heating chamber. According to the utility model, the pump machine is used for controlling the speed of liquid reverse circulation, so that the device is suitable for raw material liquid with different volatilization speeds, the one-way valve is used for ensuring that raw materials can be added in the crystallization process, leakage is avoided, and crystals in circulation are intercepted and accumulated by using the filter screen and the separation net, so that the recycling is convenient.

The application belongs to the technical field of medical detection, and discloses a medical detection kit, which comprises a hinge-connected box body and a box cover, a plurality of placement jacks are arranged in a vertical array in the box body, a gas bag groove is horizontally arranged on one side of the same row of placement jacks in the box body, the gas bag groove is in communication with the placement jack and has an overlapping part, a limiting gas bag is arranged in the gas bag groove, a plurality of sliding grooves are formed in the box body, the sliding grooves are in communication with the gas bag groove and are perpendicular to each other, a strip-shaped pressing block is vertically and slidably arranged in each sliding groove, and a pressing column is fixedly connected to the inner side of the box cover and corresponds to the position of the strip-shaped pressing block. The placement jack and the limiting gas bag are staggered, when the box cover is closed, the pressing column presses the pressing block, the pressing block extrudes the limiting gas bag, the limiting gas bag is more full, the limiting gas bag is used for flexibly clamping the reagent tube in the placement jack, the clamping stability is better, the reagent tube is not easy to be damaged, and the kit has good shock buffering performance.

The present application relates to numerical control gang drill installation detection technical field, especially point to a kind of numerical control gang drill installation calibration detection device and method thereof, it includes base, gantry support installed on base, detection panel slidingly arranged in one side of gantry support and gang drill mounting seat group installed on base, gang drill mounting seat group includes at least two gang drill mounting seat bodies, two gang drill mounting seat bodies are arranged in parallel with interval, the upper end surface of each gang drill mounting seat body is provided with gang drill installation guide rail along its length direction;The side of gantry support is horizontally provided with transverse guide slide rail, detection panel slidingly arranged in transverse guide slide rail, gang drill installation guide rail is perpendicular to detection panel, and detection panel is detachably equipped with detection assembly.The present application is ingenious in design, shortens the time of numerical control gang drill vertical array whole assembly on numerical control gang drill equipment and calibration adjustment time, improves installation precision and production efficiency, reduces operation difficulty.

The invention relates to the technical field of underwater acoustic engineering, ocean engineering and sonar, in particular to a sound source passive positioning method and system based on a vertical array in a deep sea environment. The method comprises the following steps: receiving a time domain signal radiated by a target sound source through a large-aperture vertical array laid in a deep sea in a bottom-supported manner; performing fast Fourier transform on the time domain signal to obtain a corresponding signal frequency spectrum; obtaining frequency domain wave beam output sound fields of signal frequency spectrums of different array elements of the vertical array at different angles of arrival by using a space power spectrum estimation method; calculating a direct wave arrival angle template value, a sea surface reflected wave arrival angle template value, a direct wave arrival time delay template value and a sea surface reflected wave arrival time delay template value under different hypothetical sound source distances and different hypothetical sound source depths; and combining the four template values with frequency domain wave beam output sound fields at different angles of arrival to obtain sound source passive positioning cost functions at different sound source distances and depths, thereby realizing estimation of the distance and depth of a target sound source.

The utility model discloses a limestone transfer conveyor belt, which relates to the field of limestone transportation technology, including a plurality of support rods whose ends are vertically arrayed and mounted on a fixed frame, first rollers being mounted at both ends of the fixed frame, an array of mounting frames being mounted on a side of the fixed frame away from the support rods, the mounting frame being divided into an inclined portion and a horizontal portion, the inclined portions being symmetrically located at both ends of the horizontal portion, two buffering energy absorbing units forming a group, each group of buffering energy absorbing units being mounted at both ends of the horizontal portion and the inclined portion, two ends of the second roller being respectively connected to the buffering energy absorbing units, an array of auxiliary rollers being mounted on a side of the fixed frame away from the mounting frame, and the belt body being sleeved on the first roller, the second roller and the auxiliary roller. The utility model overcomes the defect that the existing limestone conveyor belt has no shock absorbing effect, so when the limestone falls onto the transmission belt, it is easy to break, which affects subsequent processing.

The present invention discloses a main beam structure of a wind turbine blade, which includes a blade body and a plurality of vibration isolation unit bodies. The inside of the blade body has a cavity for increasing strength and installing other components. A plurality of vibration isolation unit bodies are arranged inside the cavity. The vibration isolation unit bodies extend along the length direction of the blade body, and the plurality of vibration isolation unit bodies are arranged in a transverse and vertical array along the cross-section of the blade body. Adjacent two vibration isolation unit bodies are connected to each other to form an I-shaped main beam, and both ends of the I-shaped main beam are respectively connected to both sides of the cavity; through the I-shaped main beam formed by the plurality of vibration isolation unit bodies and the I-shaped main beam extending along the length direction of the blade body, not only can the supporting effect on the blade body be increased, but also under the action of the vibration isolation unit bodies, a phononic crystal band gap can be formed to play a vibration isolation role, avoiding the transmission of low-frequency vibration at the tip of the blade body to the root of the blade body and causing damage to the blade body.

The invention belongs to the field of soil layer shear wave velocity and damping inversion, and provides a method for joint inversion of a site model based on vertical array seismic records and drilling test data, which comprises the following steps: layering a soil layer, determining initial reference values of shear wave velocity and damping ratio after layering, and determining an observation transfer function. Constructing an inversion objective function and performing iterative search on an optimal solution by using a hill-climbing-random search algorithm, wherein the key point is to construct the inversion objective function and perform iterative search on the optimal solution by using the hill-climbing-random search algorithm; according to the method, the field model is inversed by using the actually measured vertical station seismic record and the drilling test data in a combined manner, the problem of multiplicity of solutions of a traditional inversion method is effectively solved, the shear wave velocity and damping ratio structure obtained through inversion can effectively represent the amplification effect of a local field on seismic oscillation, meanwhile, the drilling test result can be reflected, and the method is suitable for the field simulation. Therefore, the method accords with reality.

The invention particularly relates to a multi-vertical-array layout optimization method based on deep-sea interference sound field spatial distribution, which belongs to the field of underwater acoustic detection and comprises the following steps: performing sliding filtering on an original propagation loss curve received by a bottom-supported vertical array, extracting extreme points to construct an upper envelope line and a lower envelope line, and calculating an average value to obtain average interference sound field intensity; determining the width of interference fringes according to the maximum point spacing of the smooth curve, and building a single-node detection probability curve in combination with the average interference sound field intensity and a detection rate attenuation factor; a detection threshold and a system-level detection probability are obtained through Monte Carlo simulation by using a Chair-Varshey optimal fusion rule, and an optimal layout is determined by taking detection high-quality factor maximization as a standard. The method is used for solving the layout optimization problem of deep-sea wide-range underwater target multi-vertical-array passive detection.

The present invention belongs to the technical field of underwater acoustic vector signal processing, and specifically relates to a method for joint estimation of multiple parameters of broadband moving targets based on vector arrays. The present invention performs sub-band division on the broadband sound pressure and velocity signals of noisy targets received by the vector vertical array to construct an acoustic field interference structure containing target parameter information; reflects the interference structure to the time and space domain through vector beamforming, and extracts the interference structure and vertical arrival angle; combines the interference structure and vertical arrival angle to estimate the target depth based on the zero-point periodicity characteristics of the interference structure; cross-correlates the sound pressure and velocity signals received by the vector hydrophone to construct sound pressure and velocity cross-correlation velocity interference fringes, and solves the velocity parameters based on the characteristics of the fringes containing physical quantities. The present invention uses a vector vertical array to obtain the target excitation sound field interference structure and the target vertical arrival angle, and is suitable for fields such as long-range early warning and target detection of underwater targets.

The utility model provides a telegraph pole convenient to climb, and belongs to the technical field of telegraph poles, the telegraph pole convenient to climb comprises a pole body, a plurality of pedal grooves and concave parts are arranged on the pole body in a vertical array mode, the concave parts can be used for being held by hands to apply force, and the upper surface of each concave part and the lowest horizontal plane of the pedal groove are located on the same horizontal line; the climbing ladder is convenient for people to climb, and is simple in structure and convenient to manufacture and use.

This utility model provides an anti-static interference LED display driver module, relating to the field of LED display technology. It includes a base frame with a mounting bracket on one side. The mounting bracket has two through holes arranged in a horizontal and vertical array on its surface. Two limiting holes are located in the middle of each of the two through holes, and limiting posts are located at the top of each of the four limiting holes. A display driver board is located on one side of the base frame. During installation, the base frame is pressed against the mounting bracket, causing the fixing bracket and limiting posts to pass through the through holes and limiting holes respectively. During this process, the mounting bracket pushes the locking block back into the fixing bracket. When the fixing bracket has completely passed through the through holes, the locking block loses the pressure of the mounting bracket and pops out again under the action of a return spring, locking the mounting bracket. Simultaneously, the four limiting posts restrain the base frame, thus completing the installation of the LED display driver module. The entire installation process only requires pressing, eliminating the need for mounting bolts and solving the drawback of having to align and tighten bolts one by one during installation.

This invention relates to the fields of underwater acoustic engineering, marine engineering, and sonar technology, and particularly to a passive sound source localization method and system based on a vertical array in a deep-sea environment. The method includes: receiving the time-domain signal radiated by a target sound source using a large-aperture vertical array deployed on the seabed in the deep sea; performing a fast Fourier transform on the time-domain signal to obtain the corresponding signal spectrum; using a spatial power spectrum estimation method to obtain the frequency-domain beam output sound field of the signal spectrum of different array elements at different angles of arrival; calculating template values ​​for the direct wave angle of arrival, the sea surface reflected wave angle of arrival, the direct wave arrival time delay, and the sea surface reflected wave arrival time delay under different assumed sound source distances and depths; combining the four template values ​​with the frequency-domain beam output sound field at different angles of arrival to obtain a passive sound source localization cost function for different sound source distances and depths, thereby achieving the estimation of the target sound source distance and depth.

The invention relates to the technical field of electrochemical biosensors, and discloses an environmental microorganism nucleic acid electrochemical biosensing quantitative detection method based on a nanochannel, which comprises the following steps: filtering at normal pressure to obtain a MoS2-nanochannel, designing a target nucleic acid specific recognition probe, and preparing a biological recognition element and a carbon nanotube modified electrode. And constructing the electrochemical biosensor. In the electrochemical detection process, the distinguishable single-chain and double-chain nucleic acid characteristic of MoS2 is combined with a specific recognition probe, so that the anti-interference capability and selectivity of the detection method are improved; the sensitivity of the detection method is improved by utilizing the diffusion process of signal molecules in the nano-channel porous vertical array and a dual signal amplification strategy of the carbon nanotube modified electrode; the detection method provided by the invention overcomes the defects of expensive instrument and equipment, tedious operation process and high sample purity requirement of a traditional environmental microorganism nucleic acid quantitative detection method, and realizes the effect of sensitively detecting trace nucleic acid in a field complex environmental sample.

The invention discloses a semi-self-contained hydrophone synchronous array for transmitting and receiving signals based on a bearing leakage cable. Control signals such as clock signals and the like are transmitted by utilizing the principle that the specially designed force-bearing leakage cable radiates electromagnetic waves; at a semi-self-contained hydrophone end, signals are received by adopting a variable medium receiving antenna mode, so that deep sea vertical array sound signals in a large depth range are synchronously received. In addition to issuing control signals such as clock signals, hydrophone data can be uploaded to a master control electronic bin for storage through a bearing leakage cable, and the reliability of data acquisition is improved. The sound signal synchronous acquisition precision realized by the semi-self-contained hydrophone synchronous array can reach 10 mu S, and the coverage of 2000 m in deep sea can be formed at most. The semi-self-contained hydrophone provided by the invention can be used for carrying out half-wavelength array arrangement or random nested array arrangement according to any frequency.

The invention discloses a GaN chip packaging structure and method based on vertical interconnection and gradient thermal matching. The GaN chip packaging structure comprises a substrate, a wave absorbing layer is installed in the substrate in an embedded mode, a copper wire layer is installed on the substrate, and a thermal transition layer is sprayed on the copper wire layer; a GaN chip is mounted on the thermal transition layer, carbon nanotubes are vertically arrayed on a gate region of the GaN chip, and the carbon nanotubes are connected with an output end of a driving chip. The high-frequency performance breakthrough is that the parasitic inductance is reduced by more than 95%, the thermal reliability is improved, the CTE mismatch problem is thoroughly solved, the high-frequency noise is suppressed, and the wide-band shielding effectiveness is improved by 10 times.