21results about How to "Improve directionality" patented technology

The invention discloses an aeroacoustic wind tunnel corner noise elimination flow deflector, a flow deflector group and a design method, and belongs to the technical field of aeroacoustic wind tunnel test equipment. The corner flow deflector aims at solving the technical problems that an existing corner flow deflector cannot give consideration to aerodynamic performance and noise elimination performance, and a special shape design method and a combination application scheme are lacked. The noise elimination flow deflector is of an integrated structure formed by sequentially connecting a semi-oval front edge, a front straight section, an arc section, a rear straight section and a wedge-shaped tail edge, and key parameters of the upper profile and the lower profile are designed in an associated mode. The flow deflector set is formed by combining and installing at least two noise elimination flow deflectors according to a specific rule, and a uniform-section airflow channel is formed. According to the design method, coupling optimization of the noise elimination amount and the aerodynamic performance is achieved through a parameterized design process in combination with the Picrov formula, and the design method has the advantages of being high in noise elimination efficiency, small in aerodynamic loss and good in airflow uniformity, is suitable for a symmetric corner aerodynamic acoustic wind tunnel and can be widely applied to aerodynamic noise tests in the fields of aviation, automobiles and the like.

The utility model discloses a kind of machining toolings for arc groove and arc surface spare parts, including tooling base, support key block is equipped on the tooling base, the upper side of support key block is slidably connected with limit slider, the length direction both sides of limit slider are respectively connected with side plate, and the side wall of side plate is abutted to support key block;The side surface of support key block width direction is also connected with baffle, locking bolt is equipped on the baffle, and locking bolt is abutted to limit slider by passing through the baffle;Limit shaft hole is also equipped on the tooling base, and the side of limit shaft hole away from the side where baffle is arranged.This machining tooling simple structure, easily install and use, by the setting of limit slider and limit shaft hole, the positioning and fixing of the spare part to be processed placed on tooling base can be more conveniently carried out, and it is favorable to the processing of arc groove to spare part to be processed, and the finish machining of outer peripheral contour.

The application discloses a three-dimensional engine rendering control method based on adaptive deep learning. By collecting scene geometric complexity, texture complexity, processor utilization, video memory occupation and historical rendering performance data, a rendering state feature vector is constructed, and an initial rendering parameter is generated by inputting the prediction model; on this basis, an exploration search mechanism is introduced to perform multidimensional trial on the parameter, and candidate parameters are screened in combination with the trial rendering result; further based on a directional search strategy, the parameter optimization direction is determined and iterative search is performed to obtain refined rendering parameters; the optimized parameters are applied to the three-dimensional engine to complete rendering processing, and performance and image quality data are synchronously acquired; meanwhile, a rendering cycle data feedback mechanism is constructed to realize dynamic updating of the parameters and the state. The method fuses the prediction and search strategies, realizes collaborative control of rendering efficiency and image quality, and has adaptive adjustment and cyclic optimization capabilities.

The invention discloses a vascular endothelial cell as well as a preparation method and application thereof. The preparation method comprises the following steps: inoculating induced pluripotent stem cells into a culture medium containing an ROCK signal channel inhibitor for culturing, and inducing the cultured induced pluripotent stem cells by using a culture medium containing a Wnt signal channel activator and a BMP signal channel activator, so that the induced pluripotent stem cells are differentiated into mesoderm cells; inducing the mesoderm cells by using a culture medium containing a vascular endothelial growth factor and a cAMP signaling pathway agonist, so that the mesoderm cells are differentiated into endothelial coarse cells; and performing positive sorting of the endothelial cell marker CD144 on the endothelial coarse cells to obtain purified vascular endothelial cells. The induction path of the method is clear and efficient, the period is short, the vascular endothelial cell population with high purity, complete vascular barrier function and mature phenotype can be obtained, and the cell population can be applied to construction of a vascular network in a gel matrix.

The invention relates to the technical field of artificial intelligence and evolutionary computing, and particularly discloses a memory annual ring learning-based evolutionary method, which comprises the following steps of: locking elite groups, extracting core declusters, coding task constraint fingerprints, backtracking efficient operators, drawing performance operator portraits, constructing memory annual ring units and storing the memory annual ring units in a memory annual ring library. When facing a new task, analyzing and generating a to-be-matched task fingerprint, matching a historical memory annual ring unit, extracting a core declustering and efficiency operator portrait, remodeling a population basis, generating a dynamic operator weight table, and executing dual-channel collaborative guide evolution; according to the method, through collaborative optimization of the solution space and the strategy space, the convergence speed and the solving performance of the algorithm in a new environment are remarkably improved, conversion from blind exploration to experience guidance is achieved, and the challenges of knowledge migration and experience reuse in dynamic change or staged tasks of a traditional evolutionary algorithm are solved.

The invention relates to an antenna structure, electronic equipment, an adjustment method, a storage medium and a program product. The antenna structure comprises a plurality of antennas which are arranged at intervals, and each antenna is connected with a corresponding signal circuit; the working frequency bands of the two adjacent antennas are staggered; and when one of the two adjacent antennas is in a working state, the circuit state of the signal circuit connected with the other antenna is adjusted, so that the two adjacent antennas can be electromagnetically coupled. According to the embodiment of the invention, the transceiving performance of the antenna is improved.

The invention provides a method and a system for measuring and calculating a cargo communication volume. The method comprises the following steps: acquiring total freight data of a target area; the total freight data comprises highway freight data and common highway freight data; based on the total freight data, determining the expressway inter-region freight volume ratio of the expressway freight volume in the total expressway freight volume; based on the expressway freight volume and the expressway inter-region freight volume ratio, calculating an initial cargo exchange volume between the target region and other regions; based on the historical transportation data, determining a correction coefficient corresponding to the cargo exchange volume; the correction coefficient is used for representing the transportation characteristics of the transit vehicle in the target area; and according to the correction coefficient, correcting the initial cargo exchange volume to obtain a corrected cargo exchange volume. In the mode, the total cargo exchange amount corresponding to the regional road reflecting the real cargo interaction condition between the regions can be calculated, and the accuracy and reliability of a statistical result are improved.

The utility model discloses a marine electromagnetic flowmeter, including electrode assembly parts, pole shoe, magnetic yoke, fender, fixed plate, coil assembly, side plate, and coil assembly is wound on the coil skeleton by enameled wire and is fixed with glass fiber adhesive tape, install pole shoe on the fixed stud of electrode assembly parts, assemble coil assembly on pole shoe, install magnetic yoke on coil assembly and fix with nut. Pole shoe, coil assembly and magnetic yoke are two, and symmetrically install. Fix with screw on magnetic yoke in horizontal direction with fixed plate, and there is one in left and right, and finally fix magnetic yoke on electrode assembly parts. Weld annular fender on two side plates, form protective housing. The mode of mould frame cooperation magnetic pole shoe is adopted to solve, and enameled wire is wound on cylindrical mould, and the fixing of glass fiber adhesive tape is facilitated, can guarantee the long -term stability of enameled wire, also through the addition of pole shoe, enhance the magnetic field intensity and directionality.

This invention discloses a method and system for secure electro-optical hybrid transmission of UAV relays based on deep reinforcement learning. It identifies a real-time joint optimization problem involving UAV 3D acceleration, bandwidth resources, user power, and UAV power configuration under multiple constraints. A Markov decision process is constructed based on the real-time joint optimization problem to obtain the state vector for each time slot. The state vector of each time slot is input into a real-time joint scheduling network to obtain an unconstrained original joint action vector. Bounded operations and feasible mapping are performed on the unconstrained original joint action vector to obtain the actual executable joint action vector. This method can achieve real-time joint optimization of UAV 3D acceleration and resource allocation in complex low-altitude dynamic scenarios, significantly improving the security, secure transmission capability, and overall robustness of the FSO / RF hybrid UAV relay communication system.

The utility model discloses a high-safety power battery equipped with a CID and a fuse, and particularly relates to the technical field of lithium batteries, the high-safety power battery comprises a battery shell, the top of the battery shell is fixedly connected with a negative electrode upper cover plate, the bottom of the battery shell is fixedly connected with a positive electrode upper cover plate, and a protection assembly is arranged in the battery shell. The protection assembly comprises a positive electrode plastic plate. According to the high-safety power battery provided with the CID and the fuse, the protection assembly is arranged, specifically, when the current is too large and the fuse is not fused, gas in the battery blows the current interruption device to turn over to cut off the current, so that a circuit can be cut off in a shorter time, and the safety of the battery is improved. The current interruption device can cut off the circuit even if the fuse is not fused in time during overcurrent due to a certain reason, so that the risk of safety accidents is reduced.

The utility model belongs to the technical field of packaging equipment, and particularly relates to a fast carton sealing neon lamp packaging device which comprises a carton sealing workbench body, two conveying belts used for moving cartons are arranged at the top of the carton sealing workbench body, and blowing mechanisms are arranged on the carton sealing workbench body and the conveying belts. The blowing mechanism comprises an air pump arranged on one side of the carton sealing workbench body, the air pump arranged on the blowing mechanism is communicated with the high-pressure air spraying head, and when the downward bending angle of the carton folding cover is too large, high-pressure air sprayed out of the high-pressure air spraying head blows the carton folding cover to rotate upwards. Hollow mounting seats are arranged at the tops of the two conveying belts; the neon lamp packaging and sealing device can ensure that a carton can be timely matched with a side covering rod, a front cover folding piece and a rear cover folding piece on the automatic cover folding mechanism, reduces the problems of carton clamping, carton sealing failure and the like in the carton sealing process, enables the neon lamp packaging and sealing process to be smoother and more efficient, and can improve the carton sealing efficiency compared with a traditional device.

The application discloses a skull implant type ultrasonic array multifunctional multiplexing device and a control method thereof. The device comprises a functional skull body, an acoustic transmission area, an ultrasonic transducer array and a closed-loop control unit. The functional skull body has an individualized three-dimensional structure matched with a skull defect area. The acoustic transmission area is arranged in the functional skull body to form an ultrasonic transmission channel. The ultrasonic transducer array is arranged in the functional skull body and corresponds to the acoustic transmission area. The closed-loop control unit controls the ultrasonic transducer array to perform at least two working modes of ultrasonic detection, ultrasonic communication, ultrasonic energy transmission and ultrasonic nerve regulation in different time windows in a time division multiplexing mode, and dynamically adjusts the proportion of each function time window according to the system state. The application realizes the integration of the skull repair structure and the ultrasonic function module, and improves the ultrasonic resource multiplexing capability.

This invention belongs to the field of ultrasonic sensing and microelectromechanical systems (MEMS) packaging technology, specifically relating to a multi-segment acoustic packaging structure and optimization method for a PMUT ultrasonic transducer. The multi-segment acoustic packaging structure for a PMUT ultrasonic transducer includes a base, a PMUT chip, and an acoustic cavity. The acoustic cavity includes a front cavity section, a tapered transition section, a conduit section, and a waterproof and acoustically permeable membrane. A first minimum gap is formed between the radiating surface of the PMUT chip and the bottom surface of the front cavity section; a second minimum gap is formed between the waterproof and acoustically permeable membrane and the outlet end of the conduit section. Furthermore, the acoustic cavity serves as either a transmitter or a receiver. When used as a transmitter, the depth of the front cavity section is greater than that of the front cavity section when used as a receiver, and the inner diameter of the conduit section is smaller than that of the conduit section when used as a receiver. This packaging structure, through optimization of geometric parameters and acoustic characteristics, achieves differentiated performance improvements for the transmitter and receiver, increasing the transmitted sound pressure and directivity, and expanding the bandwidth and receiving angle of the receiver.

The utility model provides a high-power high-directivity waveguide coupler, and aims to solve the technical problem that the existing waveguide coupler cannot realize coexistence of multiple advantages such as compact structure and high power capacity. The waveguide coupler comprises a main channel; the auxiliary channel is located on the side portion of the main channel, and a plurality of coupling small holes are formed between the auxiliary channel and the main channel; the two coaxial converters are arranged at the two ends of the auxiliary channel respectively and located on the side, away from the main channel, of the auxiliary channel. And the two isolation windows are respectively arranged between the two coaxial converters and the auxiliary channel. The waveguide coupler is composed of a main channel, an auxiliary channel and a coaxial converter, the waveguide main channel and the waveguide auxiliary channel are connected through a coupling small hole and then connected with the waveguide coaxial converter through an isolation window, and high power, high directivity and high sealing performance are achieved.

The utility model discloses a kind of cascaded antenna device and radar.The cascaded antenna device includes waveguide feed layer, waveguide wiring layer and slit radiating layer;Waveguide feed layer includes at least two interface regions, several waveguide interfaces are provided in each interface region, and waveguide interface penetrates waveguide feed layer;Waveguide feed layer is provided with at least two waveguide chips on the side away from waveguide wiring layer, and one waveguide chip corresponds to one interface region, and at least two waveguide chips are cascaded by power divider;Slit radiating layer includes several radiation slits, and each radiation slit penetrates slit radiating layer;Waveguide interface and radiation slit one-to-one correspond;Several propagation paths are formed on waveguide wiring layer, and one propagation path is used to connect one waveguide interface and its corresponding radiation slit.The cascaded antenna device provided in the scheme is simple in process, low in cost, flexible in layout, and has the advantages of multi-channel, large aperture, high radiation efficiency, etc., to provide the basis for improving environmental perception effect.

The invention relates to an antenna structure and electronic equipment. The antenna structure comprises: a metal floor; the first frame radiator is used for radiating satellite frequency band signals, the first end of the first frame radiator is used for forming a first breaking joint, the second end of the first frame radiator is used for forming a second breaking joint, and the first frame radiator is located on the outer side of the metal floor; a whole-piece type clearance is formed between the metal floor and the first frame radiator, and the clearance is communicated with the first breaking joint and the second breaking joint; the metal piece comprises a first metal section, the first metal section and the first frame radiator are arranged in parallel, at least part of the first metal section is located on the inner side of the first frame radiator, and the first metal section is provided with a first grounding point and a second grounding point which are spaced.

This invention provides an adaptive exploratory reinforcement learning method, apparatus, electronic device, and storage medium. The method includes: acquiring the task description of the current reinforcement learning task, the action sequence executed by the agent in the most recently completed training round, and the corresponding total reward; generating a text summary and exploration suggestions for the agent's current learning state based on a first major language model and a first cue word combining the task description, action sequence, and total reward; generating a dynamic exploration strategy based on a second major language model and a second cue word combining the task description, text summary, and exploration suggestions; and replacing the preset static exploration mechanism in the original reinforcement learning algorithm with the dynamic exploration strategy to guide the agent to execute directional strategy exploration. This method significantly improves the efficiency, adaptability, flexibility, and directionality of strategy exploration, and this process does not require modification of the original reinforcement learning algorithm architecture, achieving plug-and-play exploration enhancement.

The utility model relates to the field of ovens, in particular to a dust removal mechanism of a dust-free oven, which comprises a baking cabinet and a filter box arranged on the baking cabinet, a dust removal chamber and a heating chamber are formed in the filter box, the interior of the dust removal chamber is partitioned by a partition plate to form an air inlet cavity, a fan is arranged in the air inlet cavity, an air inlet is arranged on the partition plate, and the heating chamber is arranged in the air inlet cavity. The dust removal chamber is internally connected with a dust removal filter element through an installation support, the end, close to the air inlet cavity, of the dust removal filter element is connected with a filter screen, the other end of the dust removal filter element is connected with an air collecting cover, and the air collecting cover is connected with an air outlet pipeline. The dust removal efficiency is improved through the filtering effect of the dust removal filter element, the filtered clean air is guided to the heating chamber through cooperation of the air collecting cover and the air outlet pipeline, dust carried by the air and entering the baking machine cabinet is reduced, and therefore the cleanliness of the baking environment is guaranteed, and the baking quality of products is improved.

The present application relates to the technical field of coupler, and especially relates to a single-layer microstrip coupler, which comprises: a main microstrip line and a secondary microstrip line which are coupled to each other; one end of the main microstrip line is configured as an input port of the coupler, used for receiving an electromagnetic wave signal, and the other end is configured as a through port, used for outputting a signal; one end of the secondary microstrip line is configured as a coupling port of the coupler, and the other end is configured as an isolation port; under the condition that the coupling degree between the main microstrip line and the secondary microstrip line meets the tight coupling degree condition, the non-coupling side of the main microstrip line and the non-coupling side of the secondary microstrip line are both provided with a triangular hole digging area, so as to guide the electromagnetic wave signal to propagate to the through port and the coupling port through the triangular hole digging area. Through the structural arrangement of the coupler, high directivity and tight coupling degree of the single-layer microstrip coupler are realized at the same time, the directivity of the single-layer microstrip coupler is greatly improved, and the performance of the single-layer microstrip coupler is improved.

This application proposes a method for investigating large-scale language model attacks based on knowledge graph augmentation and dynamic context, including the following steps: constructing a candidate event sequence, a first dynamic context module, and a second dynamic context module; obtaining the current event in the candidate event sequence and its event relevance; if the current event is related to the attack chain under investigation, updating the second and first dynamic context modules; obtaining causal precursor events using the updated second dynamic context module, and iteratively updating the first and second dynamic context modules based on the causal reachability of the causal precursor events to obtain the attack investigation results. This scheme uses the field semantics and tactical reachability of the current event as the core to determine the connection between the current event and the attack chain under investigation, and uses causal reachability to obtain the causal precursor events of the current event to reverse-search the starting event of the attack chain under investigation to complete the source tracing.