162results about How to "Avoid stability" patented technology

The utility model discloses universal joint detection equipment, which relates to the technical field of universal joint detection and comprises a bottom plate, a mounting frame arranged at the top of the bottom plate, a transverse moving frame slidably arranged on the right side of the top of the bottom plate, a vertical moving frame arranged at the moving end of the transverse moving frame, and a moving block arranged at the moving end of the vertical moving frame. Clamping mechanisms are arranged on the side walls of the mounting frame and the moving block, each clamping mechanism comprises a rotating disc rotationally arranged on the right side wall of the mounting frame and a rotating disc fixedly connected to the left wall of the moving block, and a telescopic air cylinder and a clamping seat are arranged on each rotating disc through a mounting plate. According to the utility model, the clamping mechanism is matched with the synergistic effect of the transverse moving frame, the vertical moving frame and the moving block, so that the clamping mechanism on the right side can flexibly move left and right and up and down in a space range, the actual detection requirement is met, meanwhile, under the action of the clamping seat, the clamping requirements of universal joints with different sizes can be met, and the working efficiency is improved. Therefore, the applicability of the device is improved.

The application belongs to the technical field of marine chemical analysis, and relates to an underwater in-situ mass spectrometer acquisition control system and method. The method comprises the following steps: a vacuum extraction step: the coarse extraction mode and the fine extraction mode are adaptively switched, the ion detection device is vacuum-extracted until the pressure is reduced to a preset threshold, and a required vacuum degree is maintained; a preheating preparation step: the membrane sampling device is initially sampled, and heating is performed at the same time until a preset working temperature is reached and the temperature is maintained constant; a dissolved gas formal detection step: the membrane sampling device is continuously supplied with water samples to be detected, and in-situ mass spectrum detection of dissolved gas in the water samples is completed; an instrument cabin gas discharge step: when it is detected that the underwater in-situ mass spectrometer floats to the water surface and the air pressure in the instrument cabin exceeds an upper limit threshold of gas discharge, the instrument cabin is discharged; a liquid leakage protection step: when liquid leakage occurs in the sampling cabin and the two core contacts are short-circuited, the high-pressure electromagnetic valve in the normally open state is closed to quickly block the liquid from entering the ion detection device.

The utility model relates to the technical field of magnetic device testing, in particular to a magnetic device multi-station testing mechanism which comprises a carrying mechanism and a testing mechanism, the carrying mechanism comprises a portal frame, a carrying transmission module, a carrying connecting frame and a carrying grabbing module, and the testing mechanism comprises a Y-axis transmission module, a testing station and a testing jig. The carrying transmission module is arranged on the portal frame, the multiple carrying grabbing modules are arranged, the carrying connecting frame is arranged on the Y-axis transmission module, the multiple carrying grabbing modules are arranged on the carrying connecting frame side by side, the testing station is provided with an upper testing module and a lower testing module, and the upper testing module and the lower testing module are oppositely arranged. Therefore, the magnetic device on the test fixture can be tested. The device is high in automation degree, a series of operations such as carrying of magnetic devices and testing of each item are automatically completed, manual intervention is reduced, and labor cost is reduced.

The invention aims at providing surveying equipment for hydrogeological survey, and relates to the technical field of measuring equipment, the surveying equipment comprises an electrode bar assembly, the electrode bar assembly comprises a pole, a pole cap and a drilling rod, and the electrode bar assembly is used for being connected with soil and measuring the resistivity of the soil; the driving assembly comprises a battery pack, a threaded sleeve, a shaft sleeve and a motor and is used for driving the electrode bar assembly to insert underground; the compaction assembly comprises a pressing rod, a first pressing plate and a second pressing plate, and it can be guaranteed that soil is attached to the electrode bar assembly. And the straightening assembly comprises a third mounting plate, a laser range finder, a measuring plate, a lens and a developing plate, plays an auxiliary role in insertion of the electrode bar assembly, ensures that the electrode bar assembly is linearly distributed, and solves the problems that the measurement position is deviated and the accuracy and the reliability of measurement data are influenced due to the fact that the electrode bar is easily inclined when being manually inserted in the prior art.

The utility model provides a tricycle brake disc relates to brake disc technical field, including the support shell, the top fixedly connected with two support blocks of support shell, the top of support block is established with the axle hole, the bottom fixedly penetrates to the bottom of support shell of axle hole, the top of support shell is provided with the rotating lever, the top fixedly connected with the rotating plate of rotating lever, two the top of rotating plate is provided with the support plate, the inner wall rotationally connected with the axle of axle hole. The utility model, through fixedly connecting two support blocks in the top of support shell, and establishing the axle hole in the top of support block, makes rotating lever can drive rotating plate to carry out effective rotation control, the rotary connection of rotating plate and support plate makes whole brake system can realize more even brake force distribution, especially, in the design, the inner wall fixedly connected baffle of brake shell's one side, and fixedly connected through the spring, makes baffle can rebound quickly in the brake process, ensures that the contact of brake shoe and brake disc is more even.

The utility model provides material distributing equipment. The material distributing equipment comprises a feeding assembly, a material distributing assembly and a first material pressing assembly. The feeding assembly is provided with at least one feeding track, and each feeding track is used for arranging a plurality of workpieces on the feeding track. The material distributing assembly comprises a material distributing frame and a driving mechanism, at least one workpiece groove for placing workpieces is formed in the material distributing frame, and the workpiece grooves and the feeding rails are arranged in a one-to-one correspondence mode; the driving mechanism is arranged to drive the material distributing frame to move to the workpiece groove to be in butt joint with the feeding rail so that workpieces can enter the workpiece groove. The driving mechanism is further arranged to drive the material distributing frame to be away from the feeding assembly, so that the workpieces in the workpiece grooves are separated from the workpieces on the feeding track. The first pressing assembly is arranged on the side, close to the distributing assembly, of the feeding assembly and used for fixing the workpieces on the feeding track through downward pressing or releasing the workpieces on the feeding track through upward moving. According to the material distribution equipment, automatic and orderly material distribution can be achieved, so that the labor cost is reduced, and the production line efficiency is improved.

The invention provides a data processing method for application communication. The method comprises the following steps: monitoring a life cycle event of a native application of a mobile terminal in a communication system through a life cycle manager; based on the life cycle event of the mobile terminal native application, updating the life cycle state of the three-dimensional vehicle control application in the communication system, so that the updated life cycle state of the three-dimensional vehicle control application and the life cycle state of the mobile terminal native application are kept synchronous; wherein the life cycle manager is located in a framework layer between a native application of the mobile terminal and a three-dimensional vehicle control application; the three-dimensional vehicle control application and the mobile terminal native application have different life cycle division modes. According to the scheme, the life state of the native application of the mobile terminal and the life state of the three-dimensional vehicle control application can be kept synchronous, and therefore the stability problem and the resource leakage problem caused by state inconsistency can be avoided.

The application discloses a radar target stable tracking method under a shielding environment, and comprises the following steps: a northeast two-dimensional coordinate system is established, and a target ship state is mapped into a state vector; a Kalman filter is used for prediction, a residual error and an innovation covariance matrix are calculated in combination with actual observation, and an elliptical threshold is constructed; if the observation falls into the threshold, the state is updated; otherwise, the observation is judged as a mismatched observation, and short-time missed detection prediction is performed; a sliding time window is set, when the number of mismatched observations in the window reaches a threshold, shielding judgment is performed in combination with the geometric relationship among the predicted positions of the ship and the target and the boundary of a static obstacle; if the condition is met, a shielding maintaining mode is entered, and the target track is continuously estimated by adjusting filter parameters or a predicted track; when a plurality of continuous observation frames fall into the threshold and the geometric shielding is removed, normal tracking is recovered through smooth transition. The application can effectively solve the problem of tracking interruption caused by the shielding of a radar target, and improve the continuity and stability of tracking under a shielding environment.

The present application relates to the technical field of computer data processing, more particularly to a kind of continuous learning method based on nearest neighbor search enhancement.kNN-CL introduces k nearest neighbor search technology, without additional training cost, effectively deal with data imbalance, solve overfitting problem, improve the generalization performance.Different from traditional methods, kNN-CL can retrieve the k nearest neighbors of a test data, and the k nearest neighbors are only related to the test data, thereby realizing selective retrieval of data storage for each task, saving time and resources.

This utility model relates to the field of incinerator technology and provides a vertical waste treatment incinerator, including a furnace body; a feeding structure located on the side wall of the furnace body; and a slag discharge structure located at the lower part of the furnace body. The slag discharge structure includes a slag discharge channel located on the outer side wall of the furnace body, and an annular heat absorption groove is provided on the outer side of the slag discharge channel, which is filled with a heat source for heat absorption. A drying chamber and a fan are sequentially arranged on the upper part of the furnace body adjacent to the slag discharge channel. By setting an annular heat absorption groove and heat-conducting plates on the outside of the slag discharge channel, this utility model can not only efficiently recover the heat released during the slag discharge process for drying the waste about to enter the incinerator, thereby improving incineration efficiency and reducing external energy input, but also effectively extend the service life of key system components and maintain the stability and energy utilization efficiency of the system by reducing the temperature of the slag discharge channel, preventing heat backflow, and ensuring the safe discharge of ash and slag.

The application provides a model training method and device and a cognitive dysfunction prediction method, belongs to the technical field of deep learning, and can construct a tear index vector through a patient tear sample and a cognitive impairment grade label; a multi-level graph neural network model is used for predicting a CDR index; the total loss of the model is calculated, the parameters of the multi-level graph neural network model are adjusted, a trained target cognitive dysfunction grade prediction model and a marker importance matrix are obtained; and finally, the cognitive dysfunction of a patient can be predicted through the target cognitive dysfunction grade prediction model, the problem of poor accuracy and stability caused by subjective judgment of doctors is avoided, and the accuracy of cognitive dysfunction grade prediction is improved.

The utility model relates to electronic circuit technical field, concretely relates to an adjustable constant current source drive circuit, in the drive circuit, when the second input end of adjusting circuit receives voltage signal, current sampling circuit perceives the current of load and forms voltage difference at both ends, feedback circuit gathers voltage difference and forms feedback signal input to adjusting circuit, and adjusting circuit exports adjusting signal according to feedback signal and received voltage signal, and the process of adjusting signal and feedback signal, gathering voltage difference, repeatedly perceiving current is repeated until feedback signal and voltage signal are consistent, and load current reaches stable value. The adjustable constant current source drive circuit provided by the utility model embodiment, through the setting of current sampling circuit, feedback circuit, adjusting circuit and control circuit, not only realizes the closed loop control and accurate adjustment of load current, and through double -end sampling, avoids the problem of system power supply noise and unstable influence introduced by single -end sampling.

The application discloses a kind of air-cooled radiator fan rotating speed control method and system, it is related to fan control technical field, its method includes: the vibration acceleration data on the controller circuit board of multiple fan array is collected;Fan system is currently based on the vibration acceleration data evaluation vibration state;Based on the vibration state adjustment multiple fan array Synchronization error allowable range;Real-time rotating speed information of each fan in the multiple fan array is obtained;Based on the synchronization error allowable range and the real-time rotating speed information of each fan Signal correction instruction is generated;Based on the signal correction instruction, the rotating speed of each fan in multiple fan array is adjusted, and the embodiment of the application has the advantages that the synchronization error allowable range is adjusted dynamically, effectively cope with the rotating speed synchronization control challenge of fan system under different vibration states, avoid the instability of control system and the disadvantage of hardware degradation caused by mechanical resonance.

The utility model discloses a solid-gas separation mechanism for a fermentation material granulation tower, and relates to the technical field of fermentation material processing. The separating mechanism comprises a tower body and a separating mechanism body, the separating mechanism body comprises a rotating disc, a vibrator and a set of conical frames, the rotating disc is an annular frame and is arranged in the tower body, shaft ends are arranged on the opposite sides of the rotating disc, the shaft ends penetrate through the side wall of the tower body and are rotationally connected with the side wall of the tower body, and the outer end of one shaft end is connected with a driving mechanism. By designing the novel solid-gas separation mechanism and adopting the mode that the double conical frames are symmetrically distributed at the same time, the two conical frames and the filter screen above the two conical frames can be subjected to transposition replacement, the using effect of the solid-gas separation mechanism is improved, the service life of the solid-gas separation mechanism is prolonged, meanwhile, due to the design of vibrators on the two conical frames, the screen can be efficiently cleaned, and the service life of the solid-gas separation mechanism is prolonged. In addition, the conical frame and the screen can be overturned by a certain angle and then vibrated and cleaned, and the screen can be vibrated and cleaned at any angle.

The application provides a starting control method and device, a storage medium, a vehicle controller and a vehicle. According to the starting control method, the road adhesion coefficient is obtained before the vehicle starts, the torque output of the vehicle when starting is controlled based on the road adhesion coefficient, and the torque output of the vehicle is controlled based on the traction control system when the slip rate of the vehicle reaches the trigger threshold of the traction control system, so that the situation that the slip rate of the vehicle is relatively high due to the excessively large torque increasing rate of the vehicle in the early stage of starting is avoided, and the acceleration performance of the vehicle is ensured.

This utility model discloses a clamping device for cutting rectangular tubes, including a base frame, a rectangular tube guide clamping mechanism, a quick clamping mechanism, and a clamping auxiliary mechanism. The rectangular tube guide clamping mechanism includes a guide plate, a placement frame, a sliding groove, a sliding sleeve, a hydraulic cylinder, and a clamping plate. The quick clamping mechanism includes a clamping tube, a clamping rod, a clamping groove, an insertion frame, a rotating sleeve, and a guide groove. The design of the guide plate, sliding groove, sliding sleeve, and hydraulic cylinder ensures that the rectangular tube can be stably and accurately positioned during the cutting process. The hydraulic cylinder clamps the tube through the clamping plate to prevent displacement during the cutting process. The clamping rod, through the cooperation of the rotating sleeve and the guide groove, can quickly insert into or release the rectangular tube, greatly improving the operating efficiency. The cooperation of the compression spring, rotating plate, fixing ring, and spring rod ensures smooth clamping action and step-by-step rotation, avoiding instability or misoperation caused by rapid operation.

The application discloses a method for culturing three-dimensional cell spheres of alveolar type II epithelial cells under a condition without exogenous matrix glue, and comprises the following steps: A, perfusion digestion treatment is performed on mouse lung tissue to obtain a single cell suspension; B, the single cell suspension is inoculated into a culture dish coated with anti-CD31 antibody and anti-CD45 antibody for immunoadhesion culture, under the culture condition, cells expressing CD31 and CD45 are subjected to immunoadhesion, meanwhile, fibroblasts with strong adhesion ability are attached to the surface of the culture dish, so that non-epithelial cells are removed, and unattached cells are collected to obtain an enriched ATII cell population; and C, the unattached cells are inoculated into a low-adhesion culture environment for suspension culture, and the culture system contains signal regulatory factors for maintaining the stability of the ATII cell phenotype, and the enrichment degree of epithelial cells is improved, and the interference of non-target cells is reduced through the combination of negative immunoadhesion of the anti-CD31 antibody and the anti-CD45 antibody and short-time adhesion treatment.

The application discloses an EPS auxiliary control method for U-turn, comprising the following steps: step S1, receiving a request signal and obtaining sensor data; the request signal comprises a request activation signal, a request angle signal and a request angular velocity signal; the sensor data comprises a hand torque, a motor torque, a vehicle speed, a steering wheel rotation angle and a steering wheel rotation speed; step S2, judging a current U-turn state according to the request signal and the sensor data, and setting a U-turn state flag bit; step S3, calculating an auxiliary torque and outputting the auxiliary torque according to the U-turn state flag bit, the request signal and the sensor data; and step S4, controlling an EPS motor to assist the U-turn according to the auxiliary torque. The application prevents the vehicle from rotating inaccurately or unstably due to the driver intervention or the change of the wheel angle during the rapid rotation of the vehicle body during the U-turn, and effectively improves the rotation stability and the driving safety by providing a suitable motor torque through the EPS.

The invention relates to a method for preparing a cycloheptatrienone derivative, and belongs to the technical field of bioengineering. The invention provides a method for preparing a cycloheptatrienone derivative, which is based on a framework editing strategy of biological catalysis and comprises the following steps of: performing biological catalysis on a substrate and an auxiliary substrate by using a phenol derivative as a substrate and nitroalkane as an auxiliary substrate and using multi-copper oxidase and / or a microorganism for producing the multi-copper oxidase as a catalyst to obtain the cycloheptatrienone derivative. The auxiliary substrate is used as a C1 unit to be inserted into the skeleton of the aromatic ring substrate for editing, so that the cycloheptatrienone derivative is generated. According to the method, multi-copper oxidase is used as a catalyst, nitroalkane which is simple, easy to obtain, safe and highly stable is used as a C1 unit, and a phenol derivative is successfully converted into the cycloheptatrienone derivative. According to the method, a single carbon insertion mediated skeleton editing biological catalysis strategy is constructed, the strategy breaks through the limitation of a traditional carbene insertion reaction, and the method has a great application prospect in skeleton modification in the field of chemical and biological catalysis.

The invention discloses an aero-engine fault diagnosis method based on a conditional physical perception diffusion model, and the method is characterized in that the method comprises the steps: obtaining a working condition monitoring parameter and a performance monitoring parameter in the operation process of an aero-engine; based on the thermodynamic system characteristics of the aero-engine, constructing a physical constraint system; a conditional physical perception diffusion model is constructed, noise addition and physical violation term injection are carried out in a physical perception forward process, and noise removal and physical violation term correction are respectively carried out through a noise prediction branch and a physical correction branch of a double-branch network by taking a fault type label as a condition in a reverse process. The double-branch network completes pre-training based on a physical constraint system; training the conditional physical perception diffusion model; based on the working condition monitoring parameters and the performance monitoring parameters, physical perception features are extracted through middle layer representation of the condition physical perception diffusion model, and fault diagnosis of the aero-engine is achieved through a fault diagnosis classifier.

The utility model discloses a GDMS test silica powder's sampling device, including first conductive sheet and second conductive sheet, first conductive sheet with second conductive sheet is pasted, be provided with the accommodation cavity between first conductive sheet with second conductive sheet, the accommodation cavity is used for placing silica powder. Through the assistance of first conductive sheet and second conductive sheet, realize the direct sampling of not conductive silica powder, break through the limitation of traditional sampling mode, avoid the discharge instability and signal fluctuation caused by charge accumulation simultaneously, improve the accuracy of test.

This application discloses a gas turbine and its nozzle, relating to the field of nozzle technology. The nozzle includes an end cap; a first fuel injector disposed on the end cap, the first fuel injector including a first flow channel and a second flow channel, and a plurality of first nozzle holes at the end of the first fuel injector, each of which communicates with the first flow channel; and a plurality of second fuel injectors disposed on the end cap, the second fuel injectors being evenly distributed around the first fuel injector. Through the arrangement of the first and second fuel injectors, this application allows for diffusion combustion of fuel ejected from the first fuel injector and premixed combustion of fuel ejected from the second fuel injectors. During the entire combustion process, the flowing air can only disturb the diffusion combustion flame, but cannot disturb the premixed combustion flame, thus effectively avoiding ignition difficulties or unstable combustion during gas turbine startup or at low operating conditions.

The present invention provides a battery pack, the structure of the battery pack, and a method for manufacturing the same. The battery pack includes: a battery module; a battery pack housing defining an internal space for accommodating the battery module; a first valve disposed in the battery pack housing to selectively connect the interior and exterior of the battery pack housing; and a support member supporting the battery pack housing from the interior. The battery pack housing is sealed such that when the first valve is closed, gas is prevented from entering and leaving the battery pack housing.

The application relates to a SPAD histogram distance calculation method and system based on coarse-precision two-stage mixed processing. The method comprises the following steps: performing full-width fast target detection on a photon time-of-flight histogram generated based on SPAD and TCSPC technology through first-stage processing to obtain coarse distance information corresponding to a target; dynamically judging whether to start second-stage processing on the target according to signal characteristics corresponding to the coarse distance information; if it is judged to start second-stage processing, performing high-precision peak position positioning on the target time window corresponding to the coarse distance information through second-stage processing to obtain accurate time-of-flight information of the target; if it is judged not to start second-stage processing, directly taking the time-of-flight corresponding to the coarse distance information as the final time-of-flight information of the target; and converting the final time-of-flight information of the target into an accurate measurement distance through a preset mapping relationship between the speed of light and the distance to simultaneously meet real-time requirements and power consumption control.

The utility model relates to the technical field of mounting structures, in particular to a curtain wall luminous character mounting structure, which comprises a plurality of fixing steel plates arranged in mounting grooves reserved in curtain wall upright posts and slidably mounted along the inner grooves, and the fixing steel plates are respectively positioned in the mounting grooves of different curtain wall upright posts; the positioning mechanism is arranged in a preformed hole of the curtain wall stand column, and the positioning mechanism is used for limiting the sliding track of the fixed steel plate and the curtain wall stand column; the curtain wall light-emitting characters are fixedly installed on the multiple fixing steel plates, and the curtain wall light-emitting characters and the curtain wall stand columns are located at the two ends of the curtain wall structure respectively; the reinforcing mechanisms are installed on the building structure, the fixing steel plates are installed on the reinforcing mechanisms, and the reinforcing mechanisms and the fixing steel plates are arranged in a one-to-one correspondence mode; the adaptability is high, and the structural strength is high.

The invention relates to a pulse delay automatic gain control method, which comprises the following steps of: determining an attenuation initial value under each power configuration after starting up according to a self-checking signal and a current environment temperature; the input radio frequency signal and the output radio frequency signal are detected in real time in the detection channel, peak value reading is carried out, and the signal amplitude is judged; reading an initial attenuation value of the current environment temperature under the current input signal, calculating a theoretical optimal gain value according to the detected output signal amplitude and the expected target output amplitude, and preferentially using the value to carry out power control; detecting whether a pulse signal arrives or not, if the difference between the current power and the target power exceeds an error threshold value, after the current pulse signal is ended or the longest signal period is ended, calculating a new gain control value according to the relationship among the attenuator characteristics, the voltage and the power, and performing amplification or attenuation processing on the output signal by adopting the new gain control value, and signals with stable amplitude are output. According to the invention, rapid and undistorted gain control of the pulse signal is realized.

The invention discloses an auxiliary instrument for clinical trauma treatment in the orthopedics department, the structure of the auxiliary instrument comprises a rotating block, a fixator, an observation opening and a fixing plate, the observation opening is located in the side face of the fixator, the fixator is embedded and fixed at the upper end of the fixing plate, and the rotating block is installed on the outer side of the fixator. Under the rotating force of the inclined plate, the first spring moves towards the lower left portion, then the whole clamping plate is blocked by the blocking strip, after blocking is released, the inclined plate is reset through the elastic force of the limiting shaft and the first spring, and then the limiting plate is limited and fixed on the side face of the blocking strip; and then the limiting plate generates a translation effect after passing through the blocking strip, so that the position of the fixing rod in the threaded groove is manually adjusted, the fixing rod adjusts and fixes the bone according to the leg shape of a person, and instability caused by fixing deviation is prevented.

The application discloses a numerical simulation method for spray combustion of an aero-engine combustion chamber, and belongs to the technical field of simulation of spray combustion of an aero-engine combustion chamber. The numerical simulation method is based on an adaptive matching iterative solution control mechanism of liquid droplet and flow field motion scale to perform outer circulation; starting from mixed fraction definition and component transport, a coupling relationship between fuel evaporation and combustion is established by deducing mixed fraction source terms and component transport equation source terms under different definitions, so that the numerical simulation method has high-fidelity coupling simulation capability of flow-spray-combustion; the RCCE method is introduced to establish a flame surface database, a large number of components in a chemical reaction mechanism are mapped to a limited number of constraint variables for dimension reduction solution, and a constraint equilibrium state is obtained according to the maximum entropy principle, and finally, the concentration of each component is reconstructed by using a constraint potential energy; while ensuring the accuracy of key chemical thermodynamic coupling, the generation efficiency of a complex fuel chemical reaction database is improved.

This invention relates to the field of aero-engine bearing testing technology, and discloses a bearing testing device, including a main shaft, a test bearing assembly, a sealing structure, and a maintenance assembly. The test bearing assembly includes a first bearing housing and a test bearing. The first bearing housing has a first air inlet. The adjusting ring of the maintenance assembly has a first end and a second end. An oil injection ring is spaced apart from the second end to form a sealing channel. A stationary ring is connected to the oil injection ring and positioned close to the second end. The first air bleed channel of the oil injection ring communicates with the second air bleed channel, and the first air bleed channel communicates with the first air inlet. The other end of the second air bleed channel communicates with the sealing channel. This invention, through the spaced arrangement of the rotating and stationary rings and the airflow guidance of the sealing channel, introduces high-temperature gas through the first air inlet of the first bearing housing and guides it into the sealing channel, recreating a real sealing scenario. This makes the bearing test verification more comprehensive and closely resembles the actual working condition, significantly improving the reference value of the test data.