1390results about How to "Achieve stability" patented technology

The invention provides a private domain live broadcast room hotspot prediction and adaptive routing method based on swarm intelligence, and relates to the technical field of data processing, and the method comprises the steps: constructing a dynamic interest community through a dynamic graph neural network, extracting group interaction mode features through a multi-layer graph attention network, and carrying out the group interaction mode features; the method comprises the following steps: generating time sequence correlation features in combination with an improved bidirectional gating loop unit, extracting high-order semantic features, performing hotspot prediction through a multi-task learning framework, constructing a multi-level network topology model according to a prediction result, and performing path exploration in combination with an improved heuristic search algorithm to obtain an optimal transmission path. Flow distribution is carried out through a weighted polling algorithm, a deep learning distributed load balancing controller and a congestion control algorithm are combined, the data transmission rate is dynamically adjusted, and self-adaptive routing pushing of live broadcast content is achieved.

The invention provides a satellite-borne multi-band synthetic aperture radar signal processing optimization method and system, and relates to the technical field of signal processing, and the method comprises the steps: obtaining original echo data of a satellite-borne multi-band synthetic aperture radar, carrying out Doppler center frequency estimation, carrying out two-dimensional matrix product operation, and obtaining compensation echo data; distance direction position information and scattering intensity information are obtained based on a distance direction matching filtering algorithm of sub-band decomposition; determining spatial distribution density, performing adaptive block processing, and performing phase error modeling in each block to generate a continuous phase correction function; performing wavelet domain convolution operation to obtain corrected echo data, obtaining a multi-band two-dimensional image, extracting a multi-dimensional feature vector through a deep neural network, performing weight learning, performing nonlinear weighted fusion, and performing adaptive histogram equalization enhancement to determine a synthetic aperture radar imaging result.

The invention relates to the technical field of drying process control, in particular to a medicinal material drying process control method and system for traditional Chinese medicinal material processing, and the method comprises the following steps: calling a temperature set value, a humidity discharge rate and heating power based on the operation condition of a drying chamber, and analyzing the difference value between the medicinal material moisture content and the target moisture content; combining the medicinal material density with the water content change rate, matching the coupling relationship between the humidity discharge rate and the heating power, and establishing an initial drying process control value; according to the method, through collaborative analysis of the temperature set value, the humidity discharge rate and the heating power, accurate matching of initial drying conditions and material characteristics is achieved, excessive drying is avoided, linkage of the air speed and the humidity discharge rate is optimized, humidity distribution uniformity and environmental stability are improved, the evaporation rate is dynamically matched, and the drying efficiency is improved. Drying uniformity and quality stability are improved, termination control parameters are optimized in real time, drying time is shortened, energy consumption is reduced, and active ingredients and physical characteristics of medicinal materials are reserved to the maximum extent.

The invention discloses an acousto-optic multi-view-field detection device and method for underwater defects of a hydraulic structure, and the method comprises the steps: obtaining original data, carrying out the filtering processing of the original data, and obtaining the filtered original data; based on the filtered original data, constructing a preprocessed multi-modal data tensor; performing spatial registration processing on the multi-modal data to obtain multi-modal data under a unified coordinate system; a self-adaptive tensor decomposition method is adopted for processing, and real-time position coordinates and movement track data of the robot are obtained; processing by adopting a multi-scale feature analysis method to obtain a target position coordinate and a target feature description; and processing by adopting a space-time optimization method and an uncertainty analysis method to obtain a final target positioning result and a confidence evaluation result. According to the method, the detection precision and the system robustness are improved, the detection accuracy is improved, the system positioning precision reaches the centimeter level, and the method is particularly suitable for intelligent defect detection in a complex hydraulic environment.

The invention discloses an external data extraction method for a retrieval enhancement generation system. The external data extraction method comprises the following steps: receiving user query data, constructing initial suffix sequence data, and extracting target output template data; calculating position loss data and gradient matrix data based on the initial suffix sequence data and the target output template data; using the gradient matrix data to select candidate words and evaluate a replacement scheme, and generating candidate word data and evaluation matrix data; selecting an optimal replacement scheme according to the evaluation matrix data, updating the sequence, and generating optimized suffix sequence data and gradient feature matrix data; building enhanced prompt sequence data based on the optimized suffix sequence data; a bypassing scheme is designed by analyzing the filtering rule, and bypassing strategy set data and execution sequence data are generated; and finally carrying out integration processing to generate an extraction data set and integrity report data. According to the invention, the accuracy and efficiency of data extraction are improved, and the robustness of the system is enhanced.

The invention relates to the technical field of automatic loading and logistics control, in particular to an automatic powder loading device based on visual identification, which comprises a visual identification module, a flexible grabbing module, a transfer module and a stacking module, the form, internal distribution and material characteristic data of the powder bag are obtained through a multi-mode sensor, a grabbing path is generated, and grabbing operation is completed through a flexible manipulator; the transfer module dynamically adjusts the transportation state of the powder bag in combination with path optimization and posture monitoring; the stacking module monitors stress of a stacking layer in real time on the basis of the stacking thermal distribution diagram, adjustment suggestion data are generated, stacking position and angle optimization is completed through a self-correction unit, and the stability of a stacking structure is ensured; the powder loading efficiency, the stacking precision and the long-term stability are remarkably improved, and the method is suitable for efficient logistics management of complex loading scenes.

The invention provides a method and system for virtual power plant resource allocation optimization and computing equipment, and is applied to the technical field of new energy prediction. The method comprises the following steps: collecting data of a distributed energy production and elimination main body through a centralized control center; establishing prediction data by using the prediction model; forming an internal scheduling plan by using a master-slave game model so as to determine the output and income of each distributed energy production and elimination main body; the operation state of the distributed energy production and elimination main body is monitored in real time through a sensor, intelligent metering equipment and a communication network, and the internal scheduling plan is dynamically adjusted according to the operation state, so that the stability and economy of the system are ensured. By using the method and the system of the invention, flexibility and economy of internal and external resource allocation of the virtual power plant can be improved.

The invention relates to an intelligent control method for a high-speed aircraft, and the method comprises the steps: building an aircraft control architecture, carrying out the decision-making of a neural network model, training a decision-making neural network, and carrying out the real-time compensation of a control instruction according to the flight state of the aircraft, so as to achieve the control of a variable-configuration high-speed aircraft. An aircraft controller adopts a model + learning double-layer architecture, a decision neural network is designed to be of a Double Network structure, overload errors of pitching, yawing and rolling channels are considered in a reward function design, training of a decision neural network model is based on a double-delay deterministic strategy gradient algorithm, a training process is optimized by adopting a prior experience playback technology and a target strategy smoothing mechanism, and a decision neural network model is obtained. The control system can achieve real-time intelligent adjustment of control instructions, overload quantities and attitude angles of three channels of the aircraft and corresponding rudder deflection instructions output by the controller at the last moment are obtained from the environment, the intelligent body outputs control instructions of pitching, yawing and rolling channels, and therefore intelligent control over the variable-configuration high-speed aircraft is achieved.

The embodiment of the invention relates to the technical field of batteries, and provides a preparation method of a lithium ion battery, which comprises the following steps: winding or laminating a positive plate, a negative plate and a diaphragm, and putting into a shell to form an initial battery cell; in the step of the first liquid injection process, a first electrolyte is injected into the initial battery cell, and the first electrolyte comprises the following components: 0.5 wt%-2wt% of vinylene carbonate, 5wt%-15wt% of lithium salt and a non-aqueous organic solvent; performing a formation process on the initial battery cell; in the step of the second liquid injection process, a second electrolyte is injected into the initial battery cell, and the second electrolyte comprises the following components: 5wt%-20wt% of vinylene carbonate, 5wt%-15wt% of lithium salt, 0.005 wt%-30wt% of an infiltration stabilizer and a non-aqueous organic solvent; wherein the first electrolyte or the second electrolyte further comprises at least one of 1, 3-propane sultone or fluoroethylene carbonate, so that the lithium ion battery is at least favorably kept to have high energy efficiency and long cycle life under the condition of low liquid injection amount.

The invention discloses a bearing temperature early warning method and system based on the Internet of Things, and relates to the technical field of bearing temperature testing. The bearing temperature early warning method based on the Internet of Things comprises the following steps of performing data acquisition; performing anomaly analysis and deviation analysis; executing step-by-step adjustment; and carrying out early warning operation. According to the method, the temperature anomaly index and the operation environment deviation index are obtained by conducting anomaly analysis and deviation analysis on the collected bearing temperature and operation environment data respectively, the anomaly moment is marked through the temperature anomaly index and the preset anomaly threshold value, and then whether step-by-step adjustment is executed or not is judged through the operation environment deviation index and the preset deviation threshold value. And finally, early warning operation is performed according to the temperature anomaly index, so that the effect of improving the bearing temperature anomaly monitoring accuracy is achieved, and the problem of insufficient association between the operation environment change and the temperature anomaly in the bearing temperature monitoring process in the prior art is solved.

The invention discloses an industrial personal computer high-performance heat dissipation device and an industrial personal computer, and relates to the technical field of industrial computers, and the industrial personal computer high-performance heat dissipation device comprises a high-efficiency heat dissipation ceramic chip group which is installed on the side of the bottom end in a machine body and is used for rapidly dissipating heat generated in the machine body, and the heat generated in the machine body is rapidly dissipated through cooperation of a fixed-point dynamic heat conduction and heat dissipation assembly; the working frame plate drives the heat conduction frame and the semiconductor contact end to stretch out and draw back, accurate contact with a heat source point is achieved, stability and reliability of the industrial personal computer during high-load operation are achieved, and optimization of the heat dissipation effect is ensured. The magnetic flowing particles are controlled to form specific arrangement in the circulating cooling liquid flowing pipe, the shielding effect on electromagnetic signals is enhanced, dynamic protection on external electromagnetic signals is achieved through dynamic adjustment of rotating the electromagnetic protection arc plate and control over the magnetic flowing particles, and therefore the electromagnetic signals can be effectively protected in the high-electromagnetic-interference environment. And the stability and reliability of the industrial personal computer are ensured.

The invention provides a digital control-based printing and dyeing industrial wastewater pH value automatic regulation system, which comprises a pH value detection module, a data processing module, a control module and a regulator adding module, realizes real-time monitoring and accurate control of the printing and dyeing industrial wastewater pH value, effectively avoids the problem of unstable biological treatment effect caused by pH value fluctuation, and improves the quality of the printing and dyeing industrial wastewater. Through an accurate sensor and an advanced control algorithm, the system can obtain wastewater pH value data in real time and automatically calculate the adjusting amount, so that the wastewater pH value is always kept in an optimal treatment range, the wastewater treatment efficiency and stability are improved, and a traditional manual adjustment mode is time-consuming, labor-consuming, time-saving and labor-saving. The system can automatically adjust the adjusting amount according to real-time data, so that the continuity and stability of wastewater treatment are realized, and the overall treatment efficiency is improved.

The invention relates to the technical field of production monitoring, in particular to a method, a system and equipment for monitoring key links of enzyme preparation production. The method comprises the following steps: acquiring equipment node information of an enzyme preparation production key link and equipment operation information corresponding to the equipment node information, and determining set operation parameters corresponding to each production equipment node in the production key link based on the equipment node information, determining an actual operation parameter corresponding to each production equipment node based on the equipment operation information, and performing backtracking calibration on the set operation parameter according to the actual operation parameter and a preset calibration algorithm to obtain a calibration operation parameter corresponding to each production equipment node, and determining whether the calibration operation parameters are consistent with the set operation parameters based on the production equipment nodes, if not, generating a parameter calibration instruction based on the calibration operation parameters and the set operation parameters, and controlling the production equipment corresponding to the set operation parameters to perform parameter calibration. The production quality of the enzyme preparation is improved.

The invention discloses a memory error injection test method and device, an interface, a storage medium and electronic equipment. The method comprises the following steps: acquiring a basic test case, a hardware error injection test object and a test condition; whether a hardware error injection test needs to be executed or not is judged, if yes, the hardware error injection test object is tested according to test conditions and a basic test case, and a hardware test result is obtained; if not, skipping the hardware error injection test; obtaining software error injection test items and all function test cases corresponding to each software error injection test item; receiving an error injection parameter corresponding to the software error injection test item, and sequentially executing all the function test cases corresponding to the software error injection test item based on the error injection parameter to obtain a software test result; and obtaining a firmware test result according to the hardware test result and the software test result. Based on hardware error injection and software error injection, defects in firmware design can be covered, and firmware algorithm stability and self-recovery capability detection is realized.

The utility model discloses a gravity energy storage power recovery system based on an inertia flywheel. The gravity energy storage power recovery system comprises a gravity energy storage system and an inertia flywheel kinetic energy recovery system. A generator motor of the gravity energy storage system is sequentially connected with an energy storage driving clutch, a brake device and a winding drum through a gearbox by utilizing a rotating shaft; the inertia flywheel kinetic energy recovery system clutch is connected with one side of the winding drum, the other side of the winding drum is connected with an inertia flywheel through a fixed gearbox and a stepless gearbox, the inertia flywheel is arranged in a vacuum box, and a vacuum pump is arranged to be connected with the vacuum box. In the process that the gravity energy storage system stops energy storage or energy release, the inertia flywheel kinetic energy recovery system absorbs waste kinetic energy transmitted by the gravity energy storage system and converts the waste kinetic energy into flywheel rotation kinetic energy to be stored; in the starting stage of starting lifting of the weight block and starting of energy release, kinetic energy stored by rotation of the flywheel is released, the rotation kinetic energy stored by the inertia flywheel is transmitted to the weight block to be accelerated to the speed close to the rated running speed, and recycling of the kinetic energy is achieved.

The invention discloses an electric actuator detection device based on a hydraulic braking principle and a test method thereof. The electric actuator detection device based on the hydraulic braking principle comprises a test bench, a hydraulic braking mechanism, a data acquisition mechanism and a control system. According to the electric actuator detection device based on the hydraulic braking principle, a relation model of dynamic and static action torques of an electric actuator is established through a control system, a complete quantity value tracing chain of multiple parameters of the electric actuator under actual working conditions is established, a recheck detection method outline of a nuclear-grade electric actuator is established, the off-line detection technology of the electric actuator is mastered, and the detection efficiency of the electric actuator is improved. And basic data is provided for online diagnosis of the valve. And full-parameter detection of the electric actuator can be realized through the data acquisition mechanism. Meanwhile, detection of various parameters of the electric actuator under actual working conditions can be simulated. Meanwhile, by means of a hydraulic braking mode, automatic continuous linear adjustment of the load and the load protection function can be achieved, and the load response sensitivity and the valve load simulation performance are improved.

The invention discloses a self-aggregation weak-consolidation multifunctional sand control agent and application thereof, and belongs to the technical field of oil gas chemistry. The sand control agent is prepared by simply mixing 0.2-0.6 part by weight of a hydrophobic modifier, 0.6-1.2 parts by weight of a chemical modifier and 2-4 parts by weight of an organic solvent. The hydrophobic modifier is selected from one or more of the following components: methacryloyloxy silane, heptadecafluorodecyl trimethoxy silane, amino alkyl polydimethylsiloxane, octamethylcyclotetrasiloxane, poly [3-((2-aminoethyl) amino) propyl] methyl (dimethyl) siloxane, gamma-propyl trimethoxy silane and the like; the chemical modifier is a compound containing alkenyl. The sand control agent can be used for coating modification of a proppant, self-aggregation and clustering in water are realized, and solidified sand is formed through polymerization of the alkenyl-containing compound on the surface, so that the sand control effect is achieved; the sand control agent can also be directly added into fracturing fluid and permeates into a stratum to form a hydrophobic consolidation layer, so that the effect of stabilizing a rock wall surface is achieved.

According to the die-casting die temperature control device and method provided by the invention, the mounting position of the temperature sensor on the die-casting die is determined based on the structural characteristics of the die-casting die, and the temperature sensor is mounted at the mounting position, so that accurate monitoring of the temperature of the die is ensured; determining a temperature range of each temperature sensor, collecting temperature data of the temperature sensors, comparing the temperature data with the temperature ranges, obtaining an abnormal temperature value and a corresponding installation position, selecting a target temperature control mode meeting the process requirement from a temperature control mode library based on the abnormal temperature value and the corresponding installation position, and sending the selected target temperature control mode to a server; and on the basis of the target temperature control mode, the temperature difference is combined, the control parameters are determined, temperature control is conducted on the die-casting die according to the control parameters, the temperature stability and accuracy of the die-casting die in the hub production process are achieved, and therefore the stability of the die and the quality of a hub in the production process are guaranteed.

The utility model relates to the technical field of gas turbines, in particular to a self-locking mechanism and a high-temperature fatigue test sample, which comprise a connecting component, a connecting sleeve, a connecting cavity arranged at the bottom end of the connecting sleeve, and a threaded head fixedly connected at the top end of the connecting sleeve, an operation assembly is adaptively mounted in the connecting sleeve, a positioning assembly is adaptively mounted in the connecting sleeve, a limiting assembly is arranged in the connecting sleeve, and a connecting cavity is formed in an inverted trapezoidal shape; when a sample to be tested needs to be installed, only one end of the sample to be tested needs to be inserted into the connecting cavity, the sample to be tested can be installed and fixed by the threaded rod through the operation steps of pressing and rotating, meanwhile, the mistaken touch prevention design can ensure that the threaded rod cannot be mistakenly touched and loosened after being installed and fixed, and the accuracy of experimental data is ensured.

The invention relates to the technical field of photoelectric communication, in particular to a PWDM (Pulse Width Division Multiplexing) optical device compatible with high and low rates, which comprises a first controller, a second controller is arranged at one end of the first controller, a transmission mechanism is connected between the first controller and the second controller, a processing mechanism is mounted at one end of the first controller, and the processing mechanism is connected with the first controller. A mounting mechanism is mounted on the first controller; through installation of the transmission mechanism, the first controller and the second controller, data processing is facilitated, optical signal receiving and transmitting are achieved, high-speed data transmission is achieved, meanwhile, compatibility of low-speed data transmission is reserved, and therefore the experience that a user uses two rates mutually is met; different optical signals can be further processed, the stability of data transmission is achieved, through connection of the installation mechanism, the equipment is convenient to install and operate, and the equipment can work more stably.

The utility model discloses a branch pipeline utilizing a centrifugal pump to adjust flow, which comprises a main water tank, a water outlet pipe is arranged at the bottom of the main water tank, the side face of the water outlet pipe is connected with a water outlet branch pipe through a centrifugal pump, and a return pipe is connected between the water outlet branch pipe and the upper end of the main water tank. According to the utility model, the combination of the return pipe and the flow velocity sensor is introduced, so that unstable water flow can be automatically guided back to the main water tank at the initial stage of starting of the centrifugal pump, and the damage to the water outlet branch pipe caused by water flow impact is effectively avoided. By means of the design, the aging speed of the pipeline is remarkably reduced, the service life of the pipeline is prolonged, and the maintenance cost and the water cut-off time caused by pipeline damage are reduced.

The invention relates to an anti-impact low-hysteresis integrated multi-way valve and a control method thereof, a valve body of the multi-way valve is integrally cast, is universal for manual and hydraulic control, is integrated with a rotary brake release valve, and is used for providing pressure for brake release of a rotary motor during manual control; the integrated dangerous working condition unloading valve is used for overload pressure unloading during manual control; the standby low-pressure unloading valve is integrated and used for low-pressure unloading during standby, unloading noise is low, and energy is saved; the integrated telescopic switching valve is used for switching of telescopic oil cylinder control during hydraulic control. System pipeline connection is simplified by integrating the valves. After-valve compensation is adopted, LS pressure acts on a compensator spring cavity through damping and a one-way valve, the compensator is opened slowly and closed quickly, load sensitive response rapidness is guaranteed, and the stability of the compensator during composite action is achieved. The three-way pressure compensator adopts a double-spring design, so that the diverter valve can be quickly opened, and the influence of the three-way pressure compensator on hysteresis of main and auxiliary coiling, amplitude variation and telescopic work is reduced.

The invention provides a quasi-zero stiffness vibration damping device based on a tensegrity, which comprises a first tensegrity vibration damping device, a second tensegrity vibration damping device and a cam group buffer device, and utilizes the nonlinear quasi-zero stiffness characteristics of the self-balance, low dynamic stiffness and high static stiffness characteristics of the tensegrity structure. Through cooperative work of the first tensioning overall vibration reduction device and the second tensioning overall vibration reduction device, longitudinal stress is converted into deformation of an elastic element of a quasi-zero-stiffness mechanism, and therefore vibration reduction is effectively achieved. According to the damping device, the whole tensioning structure and the cam set structure are combined, the damping work is achieved through the combination of the damping performance of the quasi-zero stiffness structure and the damping performance of the tensioning mechanism, the device is high in impact resistance and remarkable in self-balancing and self-stabilizing performance, vibration can be effectively reduced, and the safety of the damping device is improved.

The utility model discloses a pin header and female header connector, relates to the technical field of connectors, and aims to solve the problems that in the prior art, when a pin header and a female header are in plug-in connection, no other auxiliary pressing structure exists, the pin header and the female header are easy to separate due to stress in the use process, the circuit break is caused, and the practicability is poor. The two sides of the pin header are respectively and symmetrically provided with a plurality of contact pins, one side of the female header is provided with a plurality of slots, the plurality of slots are arranged in two rows and are arranged at intervals, the front end of the female header is provided with a springing groove, and the inside of the female header is provided with a rod cavity along one side of the springing groove. A plurality of first translation cavities are symmetrically formed in the female header along the upper portion and the lower portion of the rod cavity respectively, a pressing piece is arranged in the springing groove, a straight rod is fixedly installed on one side of the pressing piece and inserted into the rod cavity, and a compression spring is arranged in the springing groove along the outer side of the straight rod.

The invention discloses a dual-phase steel forming method and system based on critical zone heat treatment, and relates to the technical field of material heat treatment.The dual-phase steel forming method comprises the steps that material characteristics and geometric dimensions of a to-be-treated workpiece are obtained, and a heat treatment temperature control curve is determined; the method comprises the steps that a heating control area, a heat preservation control area and a cooling control area are configured, small-batch machining is conducted on workpieces to be treated, temperature monitoring and microstructure change collection are conducted, and a plurality of actual heat treatment curves, a plurality of microstructure change sequences and a plurality of dual-phase steel workpieces are obtained; generating a target microstructure change prediction model of the to-be-processed workpiece based on the microstructure change general prediction model; and the to-be-treated workpieces are subjected to mass production, real-time prediction control and overall prediction optimization are carried out, and dual-phase steel forming control is carried out. According to the method, the technical problems of low microstructure control precision and poor process consistency in the heat treatment process of the dual-phase steel in the prior art are solved, and the technical effects of precise forming and performance stability of the dual-phase steel workpiece in production are achieved.

The invention relates to the technical field of micron-sized jet flow and uniform atomization, in particular to a monodisperse uniform fog drop device and an atomization spray head spray hole array arrangement method, and the monodisperse uniform fog drop device comprises a driving source, a liquid supply device and a spray head; the spray head is a monodisperse atomizing spray head, the driving source is an ultrasonic signal generating system, the liquid supply device supplies constant-pressure fluid to the spray head, and the spray head forms monodisperse spray under the driving of high-frequency sound waves of the ultrasonic signal generating system; the spraying hole array arrangement method of the atomizing nozzle comprises the following steps of: setting smaller spraying hole spacing in small deformation areas close to the center of the spraying hole plate and constraint ends on two sides of the spraying hole plate; a large safety distance is arranged in a large deformation area between the restraining end of the spray orifice plate and the center of the spray orifice plate, so that intersection caused by jet flow intersection is prevented. According to the device and the arrangement method, the problems of mutual interference and the like between large-scale array jet flows are solved; the controllability of the size and the speed of the monodisperse atomized liquid drops can be effectively improved, so that macro micro liquid drops with uniform size and concentrated speed are generated.

The invention discloses a control method and system based on self-adaption MPC large structure dynamic sliding shipment, the system comprises a sensor module, a computer system and a central controller, a pressure sensor is arranged between the upper end of a hydraulic sliding shoe and a base plate of an offshore oil and gas platform module and used for collecting the pressure value of a structure supporting point; the total station is arranged around a ship deck and used for monitoring the height change of each sliding shoe relative to a wharf; the liquid level sensors are arranged at four corners of the hull and used for collecting draft data of the four corners of the hull. The inclinometers are mounted on a bow and two sides of the barge and are used for collecting six-degree-of-freedom inclination angles of the barge; the computer system carries out calculation through a self-adaptive MPC control algorithm to obtain an optimal control strategy; and the central controller dynamically adjusts the ballast water distribution and the hydraulic sliding shoe height of the ship based on the optimal control strategy. Therefore, the ship loading safety, continuity and efficiency can be remarkably improved, the ship loading time is shortened, and the damage risk of the structure is reduced.

The invention relates to the technical field of pressure transmitter transfer, in particular to a machining production line transfer device suitable for pressure transmitter manufacturing, which comprises a base, a conveying table is fixedly mounted at the top of the base, a conveying belt is rotatably mounted on the conveying table, and a plurality of self-adaptive clamping assemblies are mounted on the conveying belt at equal intervals. A feeding mechanical arm is fixedly mounted on one side of the top of the base, and a follow-up alternate feeding assembly is arranged between the feeding mechanical arm and the self-adaptive clamping assembly. According to the automatic feeding device for the pressure transmitters, material taking and feeding operation of the pressure transmitters is synchronously conducted through the follow-up alternate feeding assembly, continuous and efficient feeding efficiency is achieved, the pressure transmitters are adsorbed and fixed in the feeding process, and the self-adaptive clamping assembly is promoted to accurately clamp the pressure transmitters of different models; and the conveying table is combined with the self-adaptive clamping assembly, so that a corresponding multi-point type positioning clamping surface can be autonomously formed according to the irregular outer wall of the pressure transmitter, and the efficient anti-falling transfer effect is achieved.

The present invention relates to a semiconductor device and a valve for the same, the valve comprising: a valve body provided with a channel through which a fluid passes; the valve plate is rotationally connected with the valve body and can completely or partially cover the channel during rotation; the sealing ring is arranged on the outer edge of the valve plate and can rotate along with the valve plate to form sealing connection with the channel of the valve body; wherein the sealing ring comprises a fixing part and an elastic part, the fixing part is connected with the elastic part, and the fixing part is arranged on the side close to the valve plate and used for being fixedly connected with the valve plate; the elastic part is arranged on one side of the valve body and provided with a protrusion, and the protrusion extends in the direction of the valve body. The valve can be more wear-resistant, the protrusions are arranged, and the sealing effect can be achieved after friction loss through cooperation with the protrusions of the elastic part; and the valve can control the pressure change more easily.

The invention relates to the technical field of semiconductors and electronic chemicals, and particularly discloses an etching solution for selectively etching silicon nitride and titanium nitride and a preparation method of the etching solution, the etching solution comprises the following components in percentage by mass: 10-45% of phosphoric acid, 1-5% of hydrofluoric acid, 0.5-2.5% of a pH buffer agent, 0.01-1.8% of a solubilizer, 0.1-7% of an etching inhibitor and the balance of water. Wherein the pH buffering agent can effectively stabilize the pH of the etching solution, and the solubilizer can improve the solubility of a solvent in the etching solution, reduce the tension of a solid-liquid phase interface in the solution and promote the transfer rate of interphase substances; the etching inhibitor and metal can form a layer of film on the surface of titanium nitride in a coordination bond mode, and it is guaranteed that silicon nitride and titanium nitride have the high selection ratio. The etching solution provided by the invention can inhibit the etching rate of titanium nitride under the condition of higher etching rate of silicon nitride, and can ensure that the requirement of high selection ratio of silicon nitride and titanium nitride is met.