22results about How to "Smooth change" patented technology

The invention provides a lightweight human shape detection method and device based on improved RTDETR, a medium and a product, and the method comprises the steps: obtaining a data set for human shape detection, and dividing the data set into a training set, a verification set and a test set; an improved RTDETR model is constructed, an ES Block is used in the improved RTDETR model to replace a Basic Block in the RTDETR feature extraction network before improvement, and the ES Block comprises an OfficientVIT Block and a SimAM attention module which are connected in sequence; the NWD Loss is used as a loss function of the improved RTDETR model; training the improved RTDETR model by using a training set, verifying the improved RTDETR model by using a verification set and testing the improved RTDETR model by using a test set to obtain a trained improved RTDETR model; and inputting the to-be-detected image into the trained improved RTDETR model for reasoning to obtain a human shape detection result of the to-be-detected image. By means of the technical scheme, the human shape detection precision and small target human shape detection in a security and protection monitoring complex scene can be improved.

The application belongs to the technical field of combustion engines, and provides a large-size side exhaust pipe of a turboshaft engine, which comprises: a pipe body having an inlet end and an outlet end; an outlet reinforcing structure arranged at the outlet end region of the pipe body; a support structure arranged inside the pipe body; an anti-abrasion connecting structure arranged at the inlet end of the pipe body; and an internal flow passage of the pipe body is configured to guide the gas input from the inlet end to be discharged laterally at the outlet end, the internal flow passage of the pipe body has a preset expansion cone angle θ2, the flow passage center line of the pipe body is a three-dimensional space curve constructed based on a non-uniform rational B-spline curve, and the ratio of the outer diameter size of the inlet end to the center transverse distance between the inlet end and the outlet end satisfies a preset condition. The core aerodynamic problem of "complex internal flow field organization of a large-size side exhaust pipe, non-uniform outlet flow field and small effective aerodynamic area" in the prior art is solved, and the limit performance of the exhaust pipe is excavated without affecting the performance of the engine.

The present application belongs to the technical field of Internet of Vehicles and communication security, and discloses a federated learning training method based on vehicle state perception and applicable to dynamic Internet of Vehicles. The method collects vehicle running state information of vehicle clients, preliminarily screens candidate vehicle clients, calculates comprehensive scores of the screened vehicle clients, adopts a client selection strategy combining selection of the top-ranked clients with random supplementation to determine a set of vehicle clients participating in the current round of federated learning, configures local training parameters for the selected vehicle clients according to vehicle speed and computing capacity, performs local training on local data sets to obtain model updates, performs weighted aggregation on the model updates of the effective participating vehicle clients at the server end, introduces a momentum mechanism to smooth the model update process, and obtains new global model parameters. This method effectively improves the stability, robustness and training efficiency of federated learning in a high-dynamic Internet of Vehicles environment.

The application relates to an aerodynamic profile suitable for a wind tunnel and a design method thereof, and belongs to the technical field of aviation aerodynamic wind tunnel tests. The front end surface of the aerodynamic profile is a square section, the rear end surface of the aerodynamic profile is a circular section, the middle part of the aerodynamic profile is a transition section, and the front and rear sections are connected through the change of the section shape from front to back. The research and development purpose is to provide a novel aerodynamic profile design method for the transition from a square section to a circular section, the flow field can be smoothly transitioned from a square to a circle, the influence on the flow field quality is minimized, the pressure loss is reduced, and the method of rounding the right angle and gradually increasing the rounding radius is adopted to realize the smooth transition from the square section to the circular section. The circular arc curve is gradually lengthened, the right angle side is gradually shortened, and finally the profile line is completely changed into a circular shape. The transition mode is natural and smooth, the change is gentle, the aerodynamic performance is good, and the interference on the flow field due to the change of the section shape can be obviously reduced.

The embodiment of the invention discloses a vehicle door closing state determination method, a vehicle and a product, and relates to the technical field of vehicle control, the method comprises the following steps: in response to a triggering operation on a vehicle door closing event, acquiring a sound signal associated with the vehicle door closing event and a state parameter influencing vehicle environment noise; wherein the state parameters comprise at least one of vehicle working condition parameters and environment parameters which influence vehicle environment noise; extracting sound features of the sound signals; performing feature analysis on the sound features based on the state parameters, and obtaining the closing state of the vehicle door based on an analysis result; wherein the closed state comprises an unclosed state, a fully closed state and an unclosed state. According to the technical scheme provided by the embodiment of the invention, no extra hardware sensor is needed, so that the hardware cost and the structural complexity are effectively reduced; meanwhile, the interference of different vehicle working conditions and environmental factors on the sound signals can be effectively eliminated, and the accuracy and reliability of vehicle door closing state judgment are improved.

Provided is a valve capable of smoothly changing the pressure of a back pressure fluid. A valve (V1) is provided with: a housing (60) having a high-pressure space (S2) into which a high-pressure fluid (Pd) flows, back-pressure spaces (S3, S3 ') into which a back-pressure fluid (Pb) flows, and a low-pressure space (S1) into which a low-pressure fluid (Ps) flows; and a valve body (61) disposed in the housing (60) so as to be capable of relative movement. The housing (60) has a first passage (73) provided between the high-pressure space (S2) and the back-pressure space (S3) and a second passage (78) provided between the back-pressure space (S3 ') and the low-pressure space (S1), and the valve body (61) has a first valve body part (72) for controlling the opening degree of the first passage (73) and a second valve body part (77) for controlling the opening degree of the second passage (78). The first valve body part (72) and the second valve body part (77) are linked in such a manner that the respective movement directions are opposite in the opening direction and the closing direction.

The invention belongs to the technical field of baijiu brewing, and particularly relates to high-stability baijiu and a preparation method thereof. In order to solve the technical problems that different batches of Baijiu produced in the prior art are large in flavor and taste difference, hops are unstable, and the flavor and taste of products are difficult to unify, the high-stability Baijiu is provided, the myristic acid content of the high-stability Baijiu is 5-150 ppm, and the alcoholic strength of the high-stability Baijiu is 25-78% vol. The invention also provides a preparation method of the high-stability white spirit, which is characterized in that the content of myristic acid in the white spirit is adjusted to be 5-150ppm and the alcoholic strength is 25-78% vol from traditional white spirit or white spirit fermented grains through enrichment, concentration and simple blending. According to the Baijiu obtained by the method, the stability of the hops of the Baijiu can be improved in the storage process, meanwhile, flavor substances of the Baijiu are greatly stabilized, and the fragrance and the taste of the Baijiu body are unified and coordinated under the condition that the quality of raw wine is not damaged.

The utility model provides a hydraulic power compressed air energy storage power adjusting device system, a water flow adjusting device in the power adjusting device system comprises an air storage container and a water storage container, an air compression device pipeline is connected with the air storage container, and the air storage container is communicated with the water storage container through an air expansion pipe network and an energy storage air delivery pipe network respectively. The water storage container is connected with the water storage tank through an energy storage water injection pipe network, and an adjusting pump assembly is arranged on the energy storage water injection pipe network. The inlet end of the hydroelectric generation device is connected with the water storage container through the energy releasing water conveying pipe network, the outlet end of the hydroelectric generation device is connected with the water storage tank, and the frequency conversion rectifying device is electrically connected with the hydroelectric generation device. The water outlet pressure and flow of the water storage container are controlled by adjusting the pressure of compressed air, the rotating speed, the output power and the like of hydraulic equipment are stably adjusted by combining the hydraulic power generation device and adjusting the water inlet quantity, the variable-frequency rectifying device is connected, the current of an output power supply is adjusted, the power is kept stable, and the quality of the power supply is improved.

The utility model relates to a connection structure, a relay and an electricity meter. The connecting structure comprises a hanging assembly which is connected with the pushing card and the moving contact unit and is configured to allow the pushing card and the moving contact unit to relatively rotate and move in a preset range; and the pressure spring is positioned between the pushing card and the movable contact unit. According to the application, the pressing of the moving contact unit in the closing process is realized through the pressure spring, and the pulling requirement of the moving contact unit in the breaking process is met through the hanging assembly, so that the integration of the pushing closing and breaking functions is realized, the processing and assembling difficulty of the connecting position of the pushing card and the moving contact unit is effectively reduced, and the production cost is reduced.

This application provides an image contrast enhancement method, system, electronic device, and storage medium. The method includes: separating luminance and chrominance components from the YUV data of an input image; training the luminance component for contrast enhancement using an enhancement network model to obtain an enhancement coefficient grid for the luminance component and compensation coefficients for the chrominance component; enhancing the luminance component using the enhancement coefficient grid and enhancing the chrominance component using the compensation coefficients; and obtaining an enhanced image based on the enhanced luminance and chrominance components. This application can significantly reduce computational complexity while maintaining contrast enhancement effects, and can also suppress noise and eliminate video flicker.

The application relates to the technical field of hub polishing, and particularly discloses a hub production polishing device, which comprises a base and further comprises: a polishing cylinder arranged on the base and internally provided with abrasive; a lifting table arranged on one side of the base and capable of performing lifting movement; a positioning disc located above the polishing cylinder and connected with the lifting table and capable of lifting and rotating under the drive of the lifting table; and a positioning assembly arranged on the positioning disc and comprising a plurality of clamping blocks capable of moving close to or away from each other and used for clamping and positioning the hub; the hub production polishing device realizes a 'rotation and automatic reciprocating lifting' compound motion mode of the hub through a lifting mechanism, the contact between the hub and the abrasive is more sufficient and intense, the polishing process is accelerated, and under the cooperation of the limiting assembly and the rolling shaft structure capable of rolling in the clamping block, the hub can automatically and smoothly change the clamping position in the polishing process, and the polishing dead angle problem caused by the shielding of the traditional clamp is solved.

This utility model discloses a kneading device for dough, comprising: a mixing assembly including a base, a mixing drive module, and a mixing tank, the mixing tank being connected to the mixing drive module; a kneading assembly including a lifting drive module, a cover plate, a kneading motor, and a kneading rod, the cover plate being connected to the lifting drive module, and the kneading rod being connected to the kneading motor; and a pinching assembly including a pinching motor, a drive wheel, a linkage arm, a lifting column, a guide sleeve, and a pinching hammer, the drive wheel being connected to the pinching motor, the linkage arm being rotatably connected to the cover plate, the linkage arm having a drive elongated hole and a driven elongated hole, the drive wheel having a drive shaft passing through the drive elongated hole at its eccentric position, the lifting column having a driven shaft passing through the driven elongated hole, and the pinching hammer being connected to the bottom of the lifting column, the lifting column passing through the guide sleeve. This utility model can knead in multiple regions and dimensions, enabling comprehensive cross-linking of protein molecular chains under the action of forces in different dimensions, resulting in comprehensive kneading and mixing effects and high processing efficiency.

The utility model discloses a kind of soft-start control circuit based on output voltage feedback, soft-start control circuit includes buffer circuit and control circuit, the buffer circuit includes operational amplifier;The buffer circuit is used to prevent the overshoot phenomenon of output voltage, makes output voltage curve change smooth;The control circuit includes capacitor, control tube, voltage divider component and discharge tube, the capacitor is connected with the drain of the discharge tube and the operational amplifier, the voltage divider component is connected with the capacitor and the control tube respectively;The control circuit is used to control soft-start time.The utility model can improve the response speed of soft-start control circuit, avoid appearing output voltage overshoot phenomenon;And it can accurately control soft-start time, effectively controllable limit in power-on process inrush current.

The application discloses a water tunnel experimental device, system and method based on an ejecting principle, and belongs to the technical research field of hydrodynamic experiments; the experimental device comprises a front return flow section, an experimental section, a static section, a rear return flow section, a bottom fairing section and a power system; the front return flow section, the experimental section, the rear return flow section and the bottom fairing section are sequentially connected through flanges to form a closed water tunnel; the static section is a pipeline with open ends and is connected in parallel with the experimental section, one end of the static section is connected to an outlet end of the front return flow section, and the other end of the static section is connected to an inlet end of the rear return flow section; the power system is used for moving fluid; when high-speed fluid flowing from the front return flow section enters the experimental section, the high-speed fluid is in contact with fluid in the static section to generate momentum exchange; the high-speed fluid drives low-speed fluid in the static section to move, so that a low Reynolds number flow space is formed in the experimental section.

This invention relates to the field of fiber optic sensing technology, specifically to an NHCPCF fiber optic seawater salinity sensor with dual microchannels, its fabrication method, and its application. The sensor comprises: an introductory single-mode fiber, a nodeless hollow-core photonic crystal fiber, and an outtroductory single-mode fiber, sequentially fused together. The nodeless hollow-core photonic crystal fiber includes a first cladding and a main vent. Uniformly distributed silica tubes are disposed inside the main vent, with the tube wall tangent to the inner wall of the main vent and the axis of the main vent parallel to the axis of the silica tubes. The sensor utilizes the anti-resonance reflection waveguide principle of NHCPCF and specific microchannels to measure seawater salinity. It avoids the traditional method of large-area cavitation in the cladding, employing microchannels to improve integration, effectively prevent fiber breakage, and enhance mechanical strength during testing. This sensor exhibits high sensitivity (salinity sensitivity -0.88 nm / ‰), good repeatability, and stability.

The invention discloses a remote sensing image cross-domain target detection method based on self-supervised learning branches and pseudo label time consistency. The method comprises the following steps: step 1, augmenting data sets of a source domain and a target domain; 2, forming a picture pair by the pictures of the two domains, inputting the picture pair into a feature extraction network for feature extraction, and optimizing the feature extraction network; step 3, sending the extracted features to a self-supervised learning branch for self-supervised learning, and sending the features to a target detection network for target detection; 4, updating the weight of the teacher model by using the weight of the target detection network; 5, generating a prediction result of a target domain by using the trained teacher model, and generating a high-quality pseudo tag through time consistency filtering; and step 6, training the target detection capability of the target domain by the student model by using the pseudo tag. According to the method, the quality of the pseudo label and the cross-domain feature extraction capability of the network are improved through the pseudo label time consistency filtering module and the self-supervised learning branch, and the problem of performance reduction caused by cross-domain is reduced.

The utility model discloses a double-layer fire-fighting tower which comprises a vertical rod, a water pipe and a spray head, a supporting platform A is arranged on the surface of the vertical rod, and a supporting platform B is arranged at the top of the vertical rod; the water pipe is arranged on one side of the vertical rod, high-pressure water cannon is arranged on the surfaces of the supporting platform A and the supporting platform B, and the water pipe is connected with the high-pressure water cannon; according to the utility model, through the adjusting mechanism in the nozzle, various adjustments on a sprayed water source can be realized, for example, the water flow speed and the spraying shape can be changed, so that not only can water be columnar and remotely sprayed to accurately strike a remote fire source, but also the water can be fan-shaped to cover in a large area to effectively extinguish a large-area fire; through the protective cover on the outer side of the climbing ladder and the protective check ring on the top of the supporting platform, all-around safety protection is provided for operators in the climbing and working processes, and the personal safety of the operators is guaranteed; and a damper and a reset spring in the adjusting mechanism are matched with each other, so that the slope top plate moves stably and has resettable performance.

The utility model relates to the technical field of chemical production, in particular to a chemical instrument floating ball measuring device with a liquid level self-adaption function, which comprises a transmitter body, a transmitter positioning seat is fixedly mounted at the bottom of the transmitter body, a measuring component is arranged at the bottom of the transmitter positioning seat, and the measuring component comprises a reed switch. The reed switch is fixedly mounted at the bottom of the transmitter positioning seat, and the bottom of the reed switch is fixedly connected with a base; according to the utility model, the reed switch, the base, the disc-shaped floating ball, the positioning sleeve and other components are arranged, and the disc-shaped floating ball and the reed switch can freely slide along the axial direction, so that the disc-shaped floating ball can trigger a magnetic field induction area of the reed switch through the lifting of the disc-shaped floating ball along with the liquid level; the density of the disc-shaped floating ball is smaller than that of the measured chemical liquid, so that the disc-shaped floating ball can stably change along with the liquid level; and the positioning sleeve provides guidance for the disc-shaped floating ball, so that the effect that the device can detect the liquid level change in real time through the movement of the disc-shaped floating ball is achieved.

The application discloses a design method and a control device of a human-imitating walking stability controller based on model reference self-adaption, and comprises the following steps: S1, a dynamic equation of a continuous swing stage of a biped robot and a mapping model of a discrete collision stage are established; S2, a virtual constraint function y=h(q) is designed to make the motion of drive joints and under-actuated joints of the biped robot coupled; S3, input / output feedback linearization processing is performed on the virtual constraint function; S4, a PD tracking controller is designed for a linear subsystem; S5, an adaptive reference model is established; S6, based on an energy minimization criterion, parameters of a desired joint trajectory of the biped robot are optimized by combining a Bezier polynomial fitting method to generate an energy-saving periodic desired trajectory; and S7, the asymptotic stability of a closed-loop system is proved by using a control Lyapunov function and a Poincare mapping to ensure that the system is periodically stable in walking.

This invention relates to a method for rapid and stable wellbore pressure control in marine hydrate formation drilling, belonging to the field of marine natural gas hydrate formation drilling. The method includes: calculating the volume of activated carbon glass microspheres to be added to the drilling fluid; injecting the drilling fluid with added activated carbon glass microspheres into the riser; when hydrate-bearing rock cuttings decompose and produce methane gas, the activated carbon glass microspheres adsorb the generated methane gas in real time, thereby maintaining stable bottom hole pressure; separating the gas-adsorbed activated carbon glass microspheres after the drilling fluid reaches the drilling platform; desorbing the separated activated carbon glass microspheres through a desorption device, filtering them through a filter device B, and then heating them; and adding the purified activated carbon glass microspheres back to the drilling fluid in the mud pit for reuse. This invention can quickly and effectively solve the problem of sudden overflows or well kicks caused by the decomposition of hydrate-bearing rock cuttings, which is beneficial for safe and efficient drilling in marine natural gas hydrate formations.

The application relates to the technical field of metal material processing, in particular to a non-magnetic stainless steel wire ion nitriding and annealing composite strengthening heat treatment method, which comprises the following steps: S1. raw material preparation; S2. cold drawing processing; S3. pre-annealing treatment; S4. surface cleaning and activation; S5. low-temperature ion nitriding treatment; and S6. high-temperature short-time annealing composite treatment. The prepared non-magnetic stainless steel wire has a relative magnetic permeability mu r of less than or equal to 1.005, a hardness of greater than or equal to 1020, a nitriding layer thickness of greater than or equal to 46.5 mu m and a corrosion weight loss of less than or equal to 0.44 g / m2.h.

The application discloses a kind of real-time optimization method and application of tool position point trajectory in numerical control machining process, belong to numerical control technical field;Including: after dividing the whole tool position point trajectory into multiple preprocessing intervals, respectively to each tool position point trajectory in preprocessing interval is optimized;The application does not need to modify CAD model or modify CAM parameter, by the online optimization when tool position point trajectory is processed, reduce the operation link when production and processing, with shorter processing cycle and higher use convenience, can with higher efficiency real-time optimization tool position point trajectory, to obtain uniform tool position point.In addition, the application carries out uniformization processing to tool position point trajectory before switching fairing, so that switching fairing result is not limited by original program segment tool tip point unit length, can improve the flexibility, accuracy of system in subsequent speed interval division process, to improve processing quality.