309results about How to "Advanced technology" patented technology

The invention discloses a method for displaying and observing aggregated niobium compounds causing stretching layering cracking of wheel steel. The method comprises the steps of sampling, grinding, low-power defect display, stripping, inlaying, grinding, polishing, corrosion, scanning electron microscope observation and phase component and element atomic ratio determination through an energy disperse spectroscopy. According to the method, the periphery is ground after sampling, then the segregation defect is displayed through corrosion of a low-power corrosive liquid, the sample is stripped off from the position 0.5-1 mm away from a segregation defect line through linear cutting, hot inlaying is conducted, and after grinding, polishing and corrosion are conducted, the shape, size and distribution of aggregated and distributed niobium compounds can be clearly displayed under a scanning electron microscope; and the components and atomic ratio of the phase can be determined by using an energy disperse spectroscopy.

The invention discloses a method and a system for evaluating the reliability of a side wall gate oxide process and electronic equipment thereof. In the TDDB test structure, the gate length L of a single finger is adjusted by increasing or reducing the number of fingers, and then a reliability test is performed to obtain a TDDB test result; and performing data fitting by using L, a TDDB test result and a gate leakage current logarithm, and finally obtaining the TDDB life of the overlapping area of the LDD region and the gate and the quality of a gate oxide layer between the lower source and drain near the side wall and the gate. The invention provides a new calculation method which is used for making up the technical blank of reliability evaluation of part of gate oxide near a side wall in the prior art. According to the method, the TDDB service life of the overlap area Sov of the LDD region and the gate is evaluated more accurately, so that a process engineer is helped to deeply understand and control the manufacturing process of the gate oxide layer, especially in the side wall and the poly region, and the optimization of the manufacturing process of part of the gate oxide layer near the side wall is facilitated.

A polarizing microscope (1) is provided with: a sample stage (4) on which a sample (8) is placed; a polarizer (3) provided on the light source side of the sample (8); and an analyzer (6) provided on the observation side of the sample (8). At least one of the polarizer (3) and the analyzer (6) is provided such that the polarization direction is inclined with respect to the optical main axis of the sample (8), or such that the included angle between the polarization direction of the analyzer (6) and the polarization direction of the polarizer (3) deviates from a right angle.

The invention relates to a dyeing process PH value self-optimization system based on multi-agent intelligent control. The dyeing process PH value self-optimization system comprises a sensing unit, a control decision unit and an execution unit. The sensing unit collects key data in the cloth dyeing process, and the key data comprise the pH value, temperature, dye concentration and flow velocity of dye liquor. The control decision-making unit adopts a multi-agent architecture and comprises a data fusion agent, a modeling agent, an optimization decision-making agent and a cooperative control agent; and the execution unit is used for regulating and controlling the pH value in the dye liquor in real time according to the final decision scheme of the control decision unit and based on PID (Proportion Integration Differentiation) control. The intelligent level of dyeing process production is enhanced while the control precision of the pH value of the dye liquor is ensured.

The invention discloses a data converter based on a voltage-controlled oscillator and an implementation method of the data converter. The data converter based on the voltage-controlled oscillator comprises a sampling circuit, a multi-bit successive approximation type data converter and a multi-bit multi-order Delta-Sigma data converter. An incremental scaling type data converter based on a voltage-controlled oscillator is improved, a feed-forward compensation method suitable for the voltage-controlled oscillator is designed, the characteristics of a Delta-Sigma data converter clock are fully utilized, a feed-forward phase is firstly added into a total differential phase of the voltage-controlled oscillator and then subtracted after quantization is finished, and therefore feed-forward compensation of a phase domain is equivalently achieved. A new time sequence is not introduced, so that the implementation cost is low; the voltage-controlled oscillator is completely isolated from sensitive nodes in the circuit, so that kickback noise is avoided; according to the invention, the high-energy-efficiency data converter based on the voltage-controlled oscillator can be constructed more simply, and can be widely applied to the fields of Internet of Things, smart medical treatment and the like.

The present invention relates to the field of semiconductor technology, and in particular to a gallium oxide diode. The gallium oxide diode comprises a gallium oxide wafer, a cathode electrode, an anode electrode and a P-type semiconductor. The gallium oxide wafer comprises a gallium oxide substrate layer and a gallium oxide epitaxial layer. The P-type semiconductor is n layers, where n is the number of layers and n≥2. The present invention provides a multilayer P-type semiconductor, and one end of the P-type semiconductor forms a PN junction with the gallium oxide epitaxial layer, and the PN junction can compensate for the charge on the depletion side. Through the depletion effect of the PN junction, non-ideal factors such as dangling bonds introduced by etching and fixed charges introduced by etching damage in the gallium oxide diode can be passivated, thereby reducing the resistance degradation caused thereby and improving the stability of the device. At the same time, the other end of the P-type semiconductor is connected to the anode electrode to form an equipotential body, which can promote the depletion of the side PN junction, and can also disperse the high electric field of the device from the original side to the end face, thereby achieving the purpose of reducing the electric field strength of the entire device.

The invention discloses a design method of an ultra-large-span tide gate with a self-stabilizing structure. The tide gate comprises gate foundations arranged on the two sides of a riverway estuary, and each gate foundation is provided with an arc-shaped guide groove and a spherical supporting hinge; the spherical trunnions are connected with one ends of the water retaining gates, the other ends of the water retaining gates make contact with each other to be in a closed state when storm surge comes, and the closing point of the water retaining gates is located on the open sea side of the connecting line of the two spherical trunnions. An arc-shaped stability maintaining piece matched with the arc-shaped guide groove is arranged in the arc-shaped guide groove, one end of the arc-shaped stability maintaining piece is fixedly connected with the water retaining gate, and the other end of the arc-shaped stability maintaining piece is connected with the hoist. Navigation and the hydrological river regime of the original river channel are not affected in the processes of structural design, manufacturing, processing, transportation, installation, overhaul and maintenance and the like, and the influence on the original river channel can be reduced to the maximum extent.

The invention discloses a coal dust influence suppression method for coal mine gas laser detection and a detection device, and the method comprises the steps: extracting gas in a coal mine goaf through a gas pump and a beam tube of the coal mine gas laser detection device, and detecting a characteristic absorption spectrum of the gas in the goaf by adopting a TDLAS technology; correcting a second harmonic signal and a peak value in the characteristic absorption spectrum by considering the attenuation influence of the coal dust in the goaf gas on the second harmonic signal of the laser penetrating through the goaf gas; and obtaining the accurate concentration value of each component gas in the goaf gas by using the corrected second harmonic signal peak value. According to the invention, the influence of coal dust on gas concentration detection can be greatly reduced, the sensitivity of gas detection is improved, and good detection effect and precision can be achieved.

The invention belongs to the technical field of aero-engines, and discloses a centrifugal impeller and an aero-engine rotor. The centrifugal impeller comprises an impeller body, a centrifugal switching section and a fastener; a connecting part is arranged on the side, close to the gas turbine disc, of the impeller body, the centrifugal switching section comprises an impeller switching part and a turbine switching part which are fixedly connected, an annular spigot is formed in the side, close to the impeller body, of the impeller switching part, and outer teeth are arranged on the outer side of the impeller switching part in the circumferential direction; the connecting part is fixedly connected with the impeller switching part through a fastener, the connecting part is located in the spigot, a positioning surface for radially positioning the impeller body is arranged in the spigot, and end teeth are arranged at the end, away from the impeller body, of the turbine switching part. The centrifugal impeller is provided with the centrifugal switching section, the impeller body and the centrifugal switching section can be made of different materials, the centrifugal switching section is made of high-temperature alloy, the abrasion resistance of the rear end teeth of the centrifugal impeller can be effectively improved, end tooth bonding is prevented or relieved, and the problems of end tooth bonding and disc body abrasion of the centrifugal impeller are solved.

The invention discloses a synthesis method of an unsaturated ketone or arone compound, which comprises the following steps: at a certain temperature, taking unsaturated hydrocarbon or aromatic hydrocarbon as a raw material, taking an N-hydroxyimide compound as a catalyst, adding an organic solvent for dissolving, introducing oxygen or air into a reaction solution under the irradiation of visible light, and carrying out oxidation reaction to obtain the unsaturated ketone or arone compound. And carrying out post-treatment separation to obtain the unsaturated ketone or arone. According to the method, air, oxygen-enriched gas or oxygen is used as a harmless oxidizing agent, visible light is used as an energy source to promote the reaction, and the method has the advantages that the reaction process is green and efficient, the cost is low, the dosage of the catalyst is small, and most of the catalyst can be recycled and reused; the atom economy is high.

The invention provides an ion beam blocking device and semiconductor process equipment. The ion beam blocking device comprises an ion screening piece and an ion collecting piece which are sequentially arranged in the ion movement direction and electrically insulated from each other. A closed space is formed between the ion screening piece and the ion collecting piece, the ion screening piece is provided with a plurality of screening holes for ions to pass through, and the screening holes are communicated with the closed space; under the condition that positive potential and negative potential are applied to the ion screening piece and the ion collecting piece respectively, an electric field formed in the closed space can guide ions to penetrate through the screening holes to enter the closed space and move towards the ion collecting piece.

A dynamic cable dynamic response monitoring method based on deep learning comprises the following steps: collecting six-degree-of-freedom motion time history data of a floating platform and three-degree-of-freedom motion time history data of a buoy section through a monitoring system, and forming a training data set for different fatigue hot spots in combination with dynamic response data of each monitoring node along the length of a cable; then, a multi-task integration model comprising a plurality of parallel regression modules is constructed, and each module focuses on predicting the tension or bending moment of a specific monitoring node; and training each regression module by using training data sets aiming at different fatigue hotspots, and integrating the regression modules to form a complete multi-task integration model. And finally, inputting motion time history data collected in real time into the model so as to predict tension and bending moment of each monitoring node and realize dynamic response monitoring of the dynamic cable. While the health monitoring of the dynamic response in the dynamic cable operation and maintenance stage is realized, the monitoring cost is reduced, and the economic benefit of the floating wind power plant is improved.

The utility model discloses an intelligent large-screen drive circuit board production system, which belongs to the field of intelligent large-screen production and comprises a feeding machine, a defect detector, a board conveying mechanical arm, a screen printing machine, a turnover manipulator and a receiving machine. The three screen printing machines are arranged, and the feeding machine, the three screen printing machines and the material receiving machine are arranged in sequence. A defect detector and a turnover manipulator are arranged between every two adjacent screen printing machines; a defect detector and a plate conveying mechanical arm are arranged between the screen printing machine and the feeding machine; and a defect detector and a turnover manipulator are arranged between the screen printing machine and the material receiving machine. According to the utility model, the circuit board is prevented from being scratched or indented, the feeding efficiency is improved, the defective intelligent large-screen driving circuit board is picked out and eliminated, the subsequent process is avoided, the effect and efficiency of the whole process are improved, the subsequent operation on the defective intelligent large-screen driving circuit board is avoided, the safety is improved, and the production cost is reduced. The printing accuracy and versatility can be improved, and the effect of saving time and labor is achieved.

The invention relates to the technical field of nickel coil mechanical property detection, in particular to a nickel coil strip mechanical property evaluation method and system based on annealing and pickling, and the method comprises the steps: obtaining a nickel coil strip, obtaining an annealing temperature interval, obtaining a pickling time interval, carrying out the interval division of the annealing temperature interval and the pickling time interval, and obtaining an annealing temperature set and a pickling time set; the annealing temperature value is matched with each pickling time in the pickling time set to obtain an annealing and pickling matching set, annealing operation is performed on the nickel coil strip to obtain an annealed nickel coil strip, pickling operation is performed on the annealed nickel coil strip to obtain a pickled nickel coil strip, the initial mechanical property value is larger than or equal to a preset mechanical property threshold value, and the initial mechanical property value is larger than or equal to a preset mechanical property threshold value. The optimal comprehensive mechanical property value is extracted from the comprehensive mechanical property value set, and nickel coil strip mechanical property evaluation based on annealing and pickling is completed based on the optimal comprehensive mechanical property value. According to the invention, annealing and pickling process parameters can be optimized.

The invention discloses an animal feed additive which is prepared from the following components in parts by weight: 20-30 parts of a green tea extract, 15-25 parts of a hawthorn extract, 10-25 parts of cactus thorn powder, 5-10 parts of garlic powder, 3-5 parts of an echinacea extract, 5-10 parts of a yeast extract, 10-15 parts of glucose and 10-50 parts of a carrier. The green tea extract, the hawthorn extract, the garlic powder, the echinacea purpurea extract and the yeast extract are scientifically proportioned, and the natural components have a synergistic effect, so that the immunity and disease resistance of animals can be remarkably improved, the occurrence of diseases is reduced, the use of antibiotics is reduced, and the health of the animals is guaranteed.

The invention discloses an intelligent safety helmet construction site mobile inspection method, system and device and a medium, and the method comprises the steps: carrying out the inspection of a set route in an inspection task through a first object wearing device; according to the equipment, an acquisition device and a positioning device are arranged on a safety helmet, and an inspection task is obtained after identification and activation; acquiring real-time information through the acquisition device, and uploading the real-time information to a rear end; using AI identification to generate a check list, and pushing the check list to a third object; the second object can perform secondary auditing and modification on the checklist at the rear end; and the third object is used for uploading a rectification result to the first object aiming at the check list, and completing the closed loop of the check list after agreeing to rectify. More efficient and more accurate data acquisition is realized, personnel and data management are more efficient, early warning of potential safety hazards can be realized, the whole billing process is fully automatic by utilizing the AI technology, human errors are reduced, and the working efficiency is improved.

The invention provides oil shale pyrolysis reaction experimental equipment which comprises a loading chamber arranged on a supporting base plane and internally provided with a cuboid space; the sample loading and unloading module is movably arranged on one side of the loading chamber so as to move the sample into the loading chamber or move the sample out of the loading chamber; the pressure control module comprises four groups of loading hydraulic cylinders arranged on four inner side surfaces of the loading chamber and a pressure head of a press machine arranged above the loading chamber so as to apply pressure to the sample in the loading chamber; the servo pump pressure module is arranged on one side of the loading chamber and is communicated with the interior of the sample in the loading chamber so as to convey high-temperature and high-pressure gas to the interior of the sample; the monitoring module comprises a displacement detection part arranged in the loading chamber and is used for monitoring the displacement of the sample in the loading chamber; the tail gas treatment module is arranged on one side of the loading chamber and communicates with the interior of the loading chamber, and the problem that in the prior art, equipment capable of conducting large-size oil shale in-situ pyrolysis reaction is lacked is solved.

The utility model relates to the technical field of vibration screening equipment, in particular to a square tube cross beam structure with a trapezoid reinforcing plate and vibration screening equipment. The cross beam connecting plates are welded to the two ends of the square tube and used for being connected with a screen frame or an external component; the cross beam trapezoidal plates are symmetrically attached to the side walls of the square tube, and the lower bottoms of the cross beam trapezoidal plates extend outwards to form supporting surfaces; the square plate is fixed at the upper end of the trapezoidal plate of the cross beam and is used for dispersing load; mounting holes are formed in the upper portion of the square plate and used for being connected with a screen bottom beam. The scheme has the advantages of light weight, high fatigue resistance and process adaptability.

The utility model belongs to the technical field of machining and forming of automobile parts, and particularly relates to oil injection and dispensing equipment which comprises an oil injection mechanism, a dispensing mechanism, a cleaning mechanism and a four-way mechanism and is used for conveying lubricating oil to a preset position of a device to be machined. The conveying device is used for conveying sealant liquid to a preset position of a to-be-processed device; the cleaning machine is used for outputting a cleaning agent for cleaning oil stains and adhesive residues; an oil injection channel, a glue injection channel, a cleaning channel and an output channel are arranged in the four-way mechanism, the oil injection channel, the glue injection channel and the cleaning channel are respectively connected with the output ends of the oil injection mechanism, the glue dispensing mechanism and the cleaning mechanism one by one, and an outlet of the output channel faces a device to be processed. Wherein the output end of the oil injection channel and the output end of the glue injection channel are communicated with the output channel, the number of the output ends of the cleaning channels is two, and the output ends of the two sets of cleaning channels are communicated with the oil injection channel and the glue injection channel respectively.

The invention discloses full-automatic stator wire hanging equipment which comprises a machine base, a conveying mechanism, a stator pressing mechanism, a first three-axis rotary wire hanging mechanism and a second three-axis rotary wire hanging mechanism are arranged at the upper end of the machine base, and the stator pressing mechanism is located at the rear end of the conveying mechanism. The first three-axis rotary wire hanging mechanism and the second three-axis rotary wire hanging mechanism are arranged at the front end of the conveying mechanism in a mirror image mode, and a positioning assembly is arranged on the side, away from the stator pressing mechanism, of the conveying mechanism. The device has the advantages that automatic feeding and discharging are adopted, wires are directly hung on a belt line without leaving a wire body, the problem that traditional winding equipment cannot meet the requirement for poor salt bath is solved, the device works in parallel with a traditional winding machine, and the device has the advantages that production takt is not affected, the size is small, occupied space is small, design is simple and manufacturing cost is low; the problem of poor production at special angles in the industry is solved through a method of independently hanging two abandoned strands of wires into a groove of a terminal seat by full-automatic stator wire hanging equipment.

The invention discloses a photoetching mask process window analysis method and system, and belongs to the technical field of photoetching processes, and the method comprises the following steps: collecting exposure process parameters, photoetching pattern parameters, window evaluation parameters and auxiliary parameters to construct an exposure analysis vector; selecting historical exposure analysis vectors to form a historical vector set, and constructing a sensitivity matrix; a real-time feature vector is constructed through online detection, and the current process state is judged in combination with a sensitivity matrix so as to identify window abnormity; once the window is identified to be abnormal, through multi-exposure condition simulation, constructing an index simulation value corresponding to a process window index for each group of exposure parameters, and screening an optimal exposure regulation and control group; converting the optimal exposure regulation and control group into an exposure execution instruction, and issuing the exposure execution instruction to execute exposure operation; and after the exposure operation is completed, deviation comparison verification is carried out, and a case sample is constructed to iteratively update the sensitivity matrix, so that the process suitability and the prediction precision are improved, and the automatic production requirement of a photoetching mask preparation production line is effectively met.

The invention discloses a positive-pressure explosion-proof MW-level conductive slip ring for an offshore oil and gas exploitation platform, and relates to the technical field of offshore oil and gas exploitation, and the slip ring comprises a main body frame, a main shaft, a ring sheet assembly, a purging control box, a cable bridge, a two-way sleeve, a main support bearing, and an auxiliary slewing bearing. The main shaft is mounted in the main body frame through a main supporting bearing and an auxiliary slewing bearing; the ring sheet assembly is stacked and mounted above the main shaft by adopting insulators, so that stable rotating transmission of MW-level power signals in an ocean vibration environment is ensured; the two-way sleeve is based on an inner and outer side double-cable bridge connection structure, and reliable through-wall transmission of high-voltage power signals can be achieved; the purging control box is mounted on a side cover plate of the main body frame in a wall-mounted manner, so that certain positive pressure on the inner side of the slip ring is ensured, the marine environment is effectively prevented from corroding the internal structure of the slip ring, and positive pressure type explosion prevention of the conductive slip ring is realized; the positive-pressure explosion-proof MW-level conductive slip ring for the offshore oil and gas exploitation platform has the advantages of being large in transmission power, high in environmental adaptability, high in reliability and the like.

The present invention proposes a universal monitor platform for microwave landing equipment and precision ranging equipment, comprising: an analog input channel is connected to a dual-channel A / D analog-to-digital converter, the dual-channel A / D analog-to-digital converter is connected to an FPGA chip in a data processing module, the FPGA chip and the DSP chip in the data processing module are connected to a storage call module and a time module through a bus; the DSP chip is connected to a CAN communication module; the dual-channel A / D analog-to-digital converter comprises: an A / D chip, a peripheral resistor, a capacitor and a resistor array, the A / D chip is connected to the resistor array, the peripheral resistor performs function configuration on the A / D chip, and the capacitor is used for powering the A / D chip and filtering the reference voltage; the power supply circuit comprises: a fusible fuse component and a power chip component, wherein the power chip component is connected to the fusible fuse component, the power chip component performs power conversion on the voltage connected from the fusible fuse component, and then the converted voltage is supplied to the corresponding chip of the monitor.

The application discloses a preparation method of zolmitriptan, relates to the technical field of drug synthesis, and comprises the following steps: adding compound 1 and reagent 1 into solvent 1 to perform a first reaction to obtain compound 2; adding the compound 2, reagent 2 and reagent 3 into solvent 2 to perform a second reaction to obtain compound 3 and the like. Compared with the prior art, the application provides a novel synthetic route for preparing zolmitriptan, the route uses L-4-bromophenylalanine as a starting material, and new synthetic steps are adopted, such as using reagent 5, such as a t-butyl alcohol metal salt and sodium hydride, to construct the oxazolidinone structure in zolmitriptan and using a coupling reaction to construct the indole ring in zolmitriptan, so that the yield of the obtained target product is significantly improved, the use of high-toxicity and high-risk reagents in the existing synthetic route is effectively avoided, and a mild, efficient, green and environmentally-friendly synthetic route for preparing zolmitriptan is provided.

This utility model discloses a powder coating device for stainless steel welding wire, including a processing box with an inlet and an outlet at both ends. Two movable plates are connected to the processing box via an adjustment mechanism. The adjustment mechanism includes a fixed plate, a drive assembly, a bidirectional threaded rod, and a limiting rod. The fixed plate is fixedly installed inside the processing box, the limiting rod is fixedly connected between the fixed plates, the bidirectional threaded rod is rotatably connected to the fixed plate, the drive assembly is connected to the bidirectional threaded rod, and the bidirectional threaded rod is threadedly connected to the movable plates. Two powder coating brushes are engaged at one end of the two movable plates via a locking mechanism, and several powder spraying heads are installed at the other end of the movable plates. Each powder spraying head is connected to a powder spraying assembly. This utility model allows adjustment of the distance between the powder coating brushes and the spraying heads, solving the problem of uneven powder coating in traditional devices when dealing with welding wires of different diameters, and improving the uniformity and quality of powder coating.

The application belongs to the technical field of semiconductor lithography, and discloses a mask absorption layer structure with low three-dimensional effect, which comprises a quartz substrate, a bottom anti-reflection layer, an absorption layer main body and a top anti-reflection layer. The bottom anti-reflection layer is deposited on the surface of the quartz substrate. The absorption layer main body is deposited on the side of the bottom anti-reflection layer away from the quartz substrate. The top anti-reflection layer is deposited on the side of the absorption layer main body away from the bottom anti-reflection layer. The absorption layer main body forms a patterned groove structure required for lithography in the XY plane. The absorption layer main body is provided with a partition modulation structure matched with the diffraction characteristics of the patterned groove structure in the Z-axis direction perpendicular to the XY plane, which can adjust the light field distribution of incident light and the phase of transmitted light, eliminate multiple reflections and phase distortion in the groove, reduce the adverse effects of mask three-dimensional effect, improve the lithography focusing precision and pattern size control ability, and meet the lithography application requirements of advanced process nodes.

A safety platform suitable for being installed in an air duct is characterized in that a manhole is formed in the bulkhead of the air duct, the air duct is arranged on one side of the manhole, an external deck is arranged on the other side of the manhole, a square grating plate is arranged on the side, located in the air duct, of the manhole, a manhole cover is fixed to the grating plate, and the manhole cover corresponds to the manhole in position and is matched with the manhole; the bottom of the grating plate is movably connected with the bulkhead through a shaft, shaft sleeves are fixed to the two ends of the shaft and fixed to the bulkhead, the grating plate is wider than the manhole, a seat ring is fixed to the side, located on the air duct, of the manhole and along the circumferential edge of the manhole, a circle of bolt holes are formed in the circumferential direction of the seat ring, and the bolt holes formed in the seat ring correspond to the bolt holes formed in the circumferential direction of the manhole. And bolts penetrate through the bolt holes from one side of the deck outside the manhole to fix the manhole cover on the manhole. The ventilation capacity is not interfered by the platform, the technology is advanced, the conception is ingenious, the manufacturing difficulty is low, the installation is simple, and the technical advantages are particularly obvious.

The invention provides a multi-component thin film evaporation film thickness monitoring and adjusting device and method and application, the multi-component thin film evaporation film thickness monitoring and adjusting device comprises a conveying module used for conveying a substrate so as to deposit a film layer on the moving substrate through a first evaporation source and a second evaporation source, the conveying module is provided with a position sensing module, and the position sensing module is used for sensing the position of the film layer on the moving substrate through the first evaporation source and the second evaporation source; a trigger signal is generated when the substrate enters the set area; the first film thickness monitoring module is used for acquiring the deposition speed of the first evaporation source and the thickness of a film layer deposited on the substrate; the second film thickness monitoring module is used for acquiring a reflection spectrum of the second evaporation source in a set area; and the control module is used for obtaining the film thickness according to the reflection spectrum of the second evaporation source through an inversion algorithm, and independently feeding back and controlling the real-time evaporation working condition. The thickness of materials with different evaporation rates is subjected to differential parallel monitoring, a closed-loop feedback system is formed, the film thickness monitoring accuracy is improved, and long-time operation of monitoring work is guaranteed.

The invention discloses a high-degree-of-freedom modulation strategy applied to a dual-active bridge converter and an optimization method. The high-degree-of-freedom modulation strategy is specifically implemented according to the following steps: step 1, determining a working mode of a DAB converter based on a conduction sequence and a time length of switches in the DAB converter; 2, solving steady-state characteristics of each working mode; step 3, taking the minimum peak value of the inductive current as an optimization target, and solving the minimum peak value current in each working mode by using a particle swarm algorithm; and 4, inputting the optimal phase shift value obtained in the step 3 into a digital signal processor. Through an innovative DAB converter modulation strategy, the effective value of inductive current is remarkably reduced, the soft switching working range of the DAB converter is greatly widened, double reduction of conduction loss and switching loss is achieved, and therefore remarkable effects are achieved in the aspects of improving circuit energy efficiency and stability and promoting technology industrialization.

A concealed integrated device of corner laser radars, the device at least comprising a cover plate (10), a fixed support (20), a lifting structure (30), an ejection structure (50), laser radars (60) and a controller (70), wherein the cover plate (10) is located on a fender (80) of a vehicle body and matches an opening in the fender (80) in terms of size; the fixed support (20), the lifting structure (30), the ejection structure (50), the laser radars (60) and the controller (70) are all located inside the fender (80); the lifting structure (30) is arranged on the fixed support (20) and is connected to the cover plate (10); the laser radars (60) are arranged on the ejection structure (50); and the ejection structure (50) is arranged on the fixed support (20). In the concealed integrated device of corner laser radars, the number of corner laser radars is reduced from 4-5 to 2, such that a cost advantage is achieved; and the corner laser radars are arranged at the position of the front fender (80), such that the risk of collision is reduced compared with the case where the corner laser radars are arranged at the positions of front and rear bumpers.