151results about How to "Reduce precision" patented technology

The invention discloses a deep tunnel surrounding rock mechanical parameter inversion method based on a three-dimensional brittle failure zone contour and sparrow optimization algorithm-information vector machine (SSA-IVM) combined optimization algorithm. The engineering technical problem that due to the fact that excavation instantaneous displacement is difficult to monitor, deep tunnel surrounding rock mechanical parameters are difficult to reasonably obtain through displacement back analysis is solved. The method comprises the following steps: firstly, constructing a tunnel FLAC3D numerical simulation model with the same ground stress condition at the occurrence position of a three-dimensional brittle failure zone; secondly, taking an absolute error between the total number of computational grid units in the actually measured brittle failure zone and the total number of computational grid units entering a plastic state in the range of the actually measured brittle failure zone after calculation of the FLAC3D numerical model as an optimization objective function; and then, by taking the tunnel surrounding rock mechanical parameters as optimization variables and taking a target function reaching a global minimum value as a target, performing global optimization by combining a tunnel FLAC3D numerical model and adopting an SSA-IVM joint optimization algorithm, thereby obtaining reasonable tunnel surrounding rock mechanical parameters.

The invention relates to the field of spindle boxes, and discloses a shockproof high-precision spindle box structure which comprises a spindle box body. A buffering assembly is arranged at the bottom end of the main spindle box body, first buffering springs are evenly installed at the bottom end of the main spindle box body, spring seats are installed at the bottom ends of the first buffering springs, auxiliary assemblies are arranged at the top ends of the spring seats, and connecting round rods are fixedly installed between the spring seats. Sliding seats are slidably mounted on one sides of the spring seats, the sliding seats are connected through second buffer springs, and connecting rods are rotatably mounted at the top ends of the sliding seats; by arranging the auxiliary assembly, the damping protection effect of the device on the main spindle box body is enhanced, the springback speed of a first buffer spring is reduced, resetting of the main spindle box body is smoother and more stable, then the working precision of the main spindle box body is improved, and the quality of machined products is improved.

The invention discloses an intelligent slub yarn parameter acquisition device, and relates to the technical field of slub yarn detection. The device comprises a device body, supporting legs are arranged at the corners of the bottom of the device body, an intelligent collector is arranged on the front face of the device body, an L-shaped frame is arranged on the back of the device body, a take-up roller is arranged in the L-shaped frame, a main shaft roller is arranged on the left side of the bottom of the inner wall of the device body, and two auxiliary wire rollers are symmetrically arranged at the bottom of the inner wall of the device body; a driving assembly is arranged at the bottom in the device body. According to the invention, the distance between the acquisition assembly and the slub yarn can be continuously changed, the appearance and detail drawings of the slub yarn at different distances are acquired by the acquisition assembly, and the acquired data are intelligently analyzed by the intelligent acquisition device, so that the acquired sample contains detailed data such as details and overall appearance, and the detection accuracy is improved. The reduction of the detection and analysis accuracy of the whole parameters of the slub yarn is avoided.

The application relates to a human blood volume in-vitro calculation method based on a magnetic tracer, and relates to the fields of biomedical engineering and quantum sensing technology.The method comprises the following steps: obtaining blood samples of a subject before and after the subject is introduced with a known mass magnetic tracer as baseline blood samples and to-be-detected blood samples; performing homogenization pretreatment on the blood samples to prevent red blood cell sedimentation; collecting baseline magnetic signals and mixed magnetic signals by using high-sensitivity magnetic sensors, and obtaining net magnetic signals through differential operation; substituting the net magnetic signals into a homologous matrix standard curve to inversely calculate the tracer concentration; and calculating the blood volume according to the dilution law.The application adopts the magnetic tracer to replace the radioactive isotope, and combines the quantum magnetic sensing technology, so that the application has the advantages of no radioactivity, high safety, portability of equipment, low cost, repeatable measurement and the like, and is suitable for bed-side rapid detection of the blood volume.

The utility model discloses a pattern die fine adjustment structure of a multifunctional household sewing machine, which comprises a pattern die, a pattern die pawl correspondingly matched with the position of the pattern die is arranged on the pattern die, a baffle is arranged at the tail end of the pattern die pawl, and a pattern die pawl swing frame is arranged on one side of the baffle. A screw capable of driving the pattern mold pawl swing frame to adjust the left-right position is arranged on the pattern mold pawl swing frame, the screw is in threaded connection with the pattern mold pawl swing frame, the tail end of the screw makes contact with the baffle, an induction plate moving along with the pattern mold pawl swing frame is connected to the pattern mold pawl swing frame, and a needle rod assembly moving along with the induction plate is connected to the induction plate. The utility model has the beneficial effects that the position of the pattern die pawl swing frame can be quickly adjusted, the left-right position of the needle bar assembly which is correspondingly matched with the pattern die can be quickly adjusted, the quick fine adjustment effect is realized, the working efficiency can be improved, the precision of parts can be reduced, and the production cost is reduced.

The utility model discloses a braided tube girdling machine which comprises a tube clamping device, a feeding device and a feed girdling device, the feeding device is configured to be in transmission connection with the tube clamping device through a feeding lead screw, and a feeding motor is utilized to drive the feeding lead screw to rotate so as to enable the tube clamping device to move to the feed girdling device. According to the ring cutting machine for the braided tube, the feeding ring cutting device completes machining of the braided tube to be machined, in the ring cutting machine for the braided tube, feeding of the tube to the tube clamping device can be completed manually, and therefore the development cost of the ring cutting machine for the braided tube can be reduced, and the production cost is further reduced. And production of braided tubes with low precision in small factories is facilitated.

This invention discloses a silicon nitride grinding device, relating to the technical field of silicon nitride grinding devices. The device includes a support frame and a collection box. A conical cylinder is fixedly mounted on the upper surface of the support frame, and the collection box is disposed on the lower surface of the support frame. A feed trough is fixedly mounted on the upper surface of the conical cylinder, and a water storage tank is fixedly mounted on the circumferential surface of the conical cylinder. A water spray head is provided on the inner wall of the conical cylinder. A rotating shaft is rotatably mounted on the upper surface of the inner wall of the conical cylinder, and a grinding head is fixedly mounted on the lower surface of the rotating shaft. A grinding disc is fixedly mounted on the inner wall of the conical cylinder. A material unblocking device is also provided inside the conical cylinder. When the feed trough is blocked, it affects the grinding efficiency, potentially causing a decrease in output or production stoppage. Blockage causes material to accumulate in the feed trough, increasing the pressure and stress on the material. If this blockage persists for a long time, it may damage the feed trough.

This utility model discloses a chip testing socket, including a base, a substrate fixedly connected to the upper surface of one end of the base, a test socket body fixedly connected to the upper surface of the substrate, a detection port fixedly connected to the upper end of the test socket body, a support block provided on one side of the test socket body, support plates symmetrically provided on both sides of the support block, a rotating shaft rotatably connected to the inner surface of the support plate, a base plate on the middle side surface of the rotating shaft, the base plate being fixedly connected to the rotating shaft via a connecting block, cylinders I fixedly connected at the four corners of the base plate, a moving plate fixedly connected to the lower end of cylinders I, an air cylinder fixedly connected inside the moving plate, a suction cup fixedly connected to the lower end of the air cylinder via a buffer structure, and an adjustment mechanism provided at the upper end of the air cylinder. This reduces the inconvenience for operators, improves the efficiency of chip testing, and avoids wear and tear on the chip during testing due to repeated contact with the chip by operators, thereby preventing a decrease in the accuracy of the chip testing results.

The invention relates to the technical field of manufacturing and processing of marine turbochargers, in particular to a method and a device for processing a ring thrust bearing of a marine supercharger, which are characterized in that after a set of preparation process including rough turning, heat treatment, semi-finish turning and inner hole accurate grinding is adopted, a special taper mandrel for grinding is used for clamping the bearing, and the bearing is clamped by a conical mandrel for grinding; the taper mandrel for grinding has the precise taper of 1: 5000, high surface quality and rigid design matched with the length of a bearing, accurate grinding of all outer circles and end faces is completed through one-time clamping of double tips of a numerical control grinding machine, and online detection is achieved in cooperation with a special auxiliary detection tool. The problem that the form and position precision is difficult to guarantee due to clamping deformation and repeated positioning errors in traditional machining is effectively solved, and therefore high-precision (such as roundness, coaxiality and parallelism are in the micron level), low-deformation, efficient and stable machining is achieved at the same time in the manufacturing process of the large thin-wall annular thrust bearing.

The invention discloses a multidirectional adjusting sliding table which comprises a moving sliding table, a sliding block is arranged on the moving sliding table, a lead screw is arranged in the moving sliding table, a moving assembly used for driving the sliding block to linearly move is arranged between the sliding block and the lead screw, and a brush used for smearing lubricating oil on the lead screw is arranged on one side of the moving assembly. A compensation assembly used for recording and callback the braking distance of the sliding block is arranged on the moving sliding table. According to the device, lubricating oil is stored in the moving block, the lubricating oil in the moving block is conveyed to a brush through a fixed block and a rotating block and is discharged through a hole formed in the brush, the brush smears the lubricating oil on the lead screw through the hole formed in the brush when the lead screw rotates to drive the moving block to move, and the lead screw rotates, so that the lubricating oil is sprayed to the lead screw; and the moving block drives the brush to move linearly, so that lubricating oil is smeared on the whole lead screw, and manual regular smearing of the lubricating oil is not needed.

The technical scheme discloses a cover clamping device of a glue binding machine, which comprises a driving assembly, a first translation assembly, a second translation assembly, a cutter plate assembly and a clamping table plate. The driving assembly drives the first translation assembly and the second translation assembly to move in a step-by-step intermittent mode. The step-by-step intermittent mode refers to a single-morph relative motion mode of the two translation assemblies. The first translation assembly is provided with a cam and a clamping sliding block. The cam intermittently drives the clamping sliding block to reciprocate. The second translation assembly is provided with a driving gear and a rack. The driving gear intermittently drives the rack to reciprocate. The cutter plate assembly is provided with two cutter plate sliding blocks which are respectively fixed to the first translation assembly and the second translation assembly. The clamping table plate is provided with a sliding groove. The cutter plate sliding blocks reciprocate in the sliding groove. The technical scheme solves the technical problem of designing a cover clamping device which is driven by a single-morph step-by-step independent operation.

The utility model relates to the technical field of electric tilting valves, and discloses a novel electric tilting valve which comprises a supporting pipe, annular connecting plates are fixedly connected to the front end and the rear end of the supporting pipe respectively, a plurality of mounting holes are formed in the middles of the annular connecting plates, and annular limiting grooves are formed in the front end and the rear end of the supporting pipe respectively. The middle of the inner wall of each annular limiting groove is fixedly connected with an annular rubber ring, the annular rubber rings and the limiting grooves are arranged, the rubber rings are embedded in the annular limiting grooves in the two ends of the supporting pipe, double sealing is formed through pressing, and the leakage problem caused by vibration or deformation of a traditional valve body is solved; the installation holes in the annular connecting plate support rapid flange installation, the sealing face is evenly stressed, local stress concentration caused by traditional bolt direct connection is avoided, the servo motor and the rotating shaft are arranged, the rotating angle of the rotating shaft is controlled through the servo motor, and linear adjustment of flow or pressure is achieved.

The utility model relates to the technical field of instant adhesive dispensing equipment, and discloses anti-solidification instant adhesive dispensing equipment which comprises a machine body, an adhesive dispenser is arranged at the top of the machine body, a heating adhesive barrel is arranged on the side wall of the machine body, an adhesive pump is fixedly connected to the top of the heating adhesive barrel, an output pipe is fixedly connected to the top of the adhesive dispenser, and the output pipe is fixedly connected to the side wall of the machine body. A clamping assembly is arranged on the outer wall of the glue pump and comprises a plurality of connecting shafts, and the connecting shafts are fixedly connected to the outer wall of the glue pump. According to the glue dispensing device, instant glue is heated to a certain temperature by heating the glue barrel, so that the instant glue is kept in a flowing state suitable for glue dispensing, it is guaranteed that the glue cannot be solidified in the output pipe, the rotating plate is pressed to rotate so that the clamping plate can be lifted up from the output pipe and cannot be clamped any more, the output pipe can be conveniently disassembled and assembled, glue residues are avoided, and the pipeline is kept smooth; and therefore, the reduction of dispensing precision or equipment failure caused by glue blockage or solidification is reduced.

This utility model provides a stainless steel flange device, including a support base and a side bracket. A servo motor is installed in the middle of the upper end of the support base. The shaft end of the servo motor is connected and fixed to the flange table through a flange and bolts. Multiple support rods are installed longitudinally on the lower edge of the flange table. Multiple lower mold seats and multiple signal transmitters are fixed on the upper edge of the flange table. A side bracket is welded to the lower left side of the support base. This design solves the problem that the original thin-walled stainless steel flange device is difficult to adapt to the material characteristics of stainless steel and is prone to defects due to "deformation concentration and stress loss" in a single punching of the convex ring. This utility model adopts a semi-automatic drive structure, which can facilitate the two-stage punching and flanged of stainless steel pipes of different sizes. The "conical pre-punching + flat final punching" achieves controllable stress, improved accuracy and reduced defects through step-by-step dispersion of deformation. It is especially suitable for high-precision and multi-specification stainless steel flange scenarios.

The utility model relates to fastener production technical field discloses fastener elastic sheet type catch hook continuous forming mould, including lower mould, the upper surface of lower mould is set up with a plurality of mould grooves, both sides of lower mould all are fixedly connected with two fixed links, the outside slide connection of fixed link has the connecting frame, a plurality of connecting frames between fixedly connected with upper mould, the lower surface of upper mould is fixedly connected with a plurality of modules, the lower surface of lower mould is set up with recess, recess's inside fixed mounting has the step motor, and the output of step motor is provided with anti -drifting subassembly. The utility model discloses utilize two mutually close limit link, fast to the metal sheet that places in a plurality of mould grooves is limited, and promotes the offset metal sheet to correct position, makes it align mould groove and processes, and with the support shell of up -and -down, after the metal sheet is processed into a plurality of catches and is in the mould groove inside, pushes it up, the metal sheet is convenient for from mould groove fast to break out to reduce the adhesion.

This invention proposes an electromagnetic stepping inspection device, relating to the technical field of inspection devices. It includes C-shaped guide rails on both sides of a conveyor, with an inspection device arranged between the two C-shaped guide rails. Rollers are installed on both sides of the inspection device and slide within the C-shaped guide rails. Electromagnetic adsorption devices are installed at both ends of the inspection device's forward direction. One set of electromagnetic adsorption devices can move along the forward direction of the inspection device. The electromagnetic adsorption devices at both ends of the inspection device can be intermittently energized to adsorb onto the C-shaped guide rails. This invention allows the inspection device to move along the C-shaped guide rails in a stepping manner by intermittently energizing two sets of electromagnetic adsorption devices. This invention enables the inspection device to handle conveyor devices with large tilt angles, simplifies stopping the inspection device on the C-shaped guide rails, and reduces the internal precision and cost of the inspection device.

The application discloses a kind of leakage point positioning method, equipment and medium of water supply network, belong to water supply network operation and leakage control technical field, for solving in existing leakage point positioning, it is easy to rely on single data, equipment and algorithm complex, and also lack high-precision space linkage and to data adaptability and insufficient refinement, it is difficult to realize the technical problems of accurate positioning of water leakage point of water supply network.Method includes: the operating state of water supply network is processed to multi-source data acquisition, obtains water supply network core data;The standardization processing of feature vector is carried out to the corrected water supply network core data after pre-processing, obtains effective water supply network data;Effective water supply network data is screened under the risk value of leakage point area about leakage point, obtains high suspected leakage point area based on water supply network section;Leakage point spatial positioning calculation is carried out to high suspected leakage point area under local topology, obtains the final leakage point area position in water supply network grid.

The invention provides a data compression method and device, electronic equipment and a chip system, and the method comprises the steps: carrying out the diagonalization matrix transformation of original conjugate symmetric positive definite matrix data, and determining the transformed target matrix data; the diagonal element data in the target matrix data are stored by adopting a first bit width, the non-diagonal element data in the target matrix data are stored by adopting a second bit width, and the first bit width is larger than the second bit width. According to the method, most information in matrix data is concentrated on diagonal elements through low-complexity matrix transformation, and secondary information is reserved on non-diagonal elements. And in combination with differential bit width quantization storage, diagonal elements in the target matrix data are subjected to high bit width quantization storage, and non-diagonal elements in the target matrix data are subjected to low bit width quantization storage. Therefore, on the premise of ensuring low precision loss and low complexity, the conjugate symmetric positive definite matrix data can be effectively compressed, so that the hardware storage overhead is reduced.

The present disclosure relates to a hierarchical calibration lightweight crystal frequency offset estimation and adaptive compensation method, aiming to solve the problems of precision limitation, slow convergence of frequency offset estimation, lack of long-term stability guarantee and high computational complexity of pure software scheme in existing technology when dealing with crystal frequency offset. The scheme designs a "short time + long time" hierarchical calibration lightweight crystal frequency offset estimation and adaptive compensation scheme with the help of the system clock and hardware interrupt mechanism of the chip, and considers the frequency offset estimation of the offline situation. Based on CH585 chip, the scheme can control the equivalent frequency offset to below 0.02ppm within 10 seconds, and the 10-second cumulative error is less than 200ns, which can meet the requirements of nanosecond-level long-term synchronization of distributed wireless system. Without additional DPLL circuit or high-precision temperature compensation crystal oscillator, the hardware cost can be reduced by more than 80%, the power consumption can be reduced by more than 50%, and it is especially suitable for large-scale sensor networks and device deployment with limited resources.

The embodiment of the invention provides an optical lens, a camera module and electronic equipment, the optical lens comprises a first lens group, a second lens group and a third lens group, the first lens group, the second lens group and the third lens group are sequentially arranged from the object side to the image side of the optical lens, the first lens group and the second lens group both have positive focal power, and the third lens group has negative focal power. The third lens group has negative focal power; the first lens group, the second lens group and the third lens group are used for moving along the optical axis of the optical lens and enabling the optical lens to realize zooming, and the first lens group and the third lens group move towards the object side in the process that the optical lens is converted from a first working state to a second working state; the second lens group is used for moving towards the object side along the optical axis after the optical lens completes zooming so as to enable the optical lens to achieve focusing. According to the scheme, the total optical length of the optical lens can be reduced.

The utility model relates to the related technical field of forming devices of silicon carbide combined bricks, in particular to a forming device of a silicon nitride and silicon carbide combined brick of a high-alkalinity rotary kiln, which comprises an isostatic pressing forming frame, an elastic die frame, a high-pressure container and an isostatic pressing forming assembly. A high-pressure container is installed at the driving position of the elastic mold frame, the elastic mold frame and the high-pressure container are arranged at the pressurizing position of the isostatic pressing forming assembly, the penetrating bolt penetrates through the reinforcing cross beam in a threaded mode, the mold frame and the elastic mold frame can be fixed, and when the mold frame and the elastic mold frame break down, the high-pressure container is installed at the driving position of the elastic mold frame, and the high-pressure container is installed at the pressurizing position of the isostatic pressing forming assembly. A user can manually screw the penetrating bolt, so that the mold frame and the elastic mold frame on the reinforcing cross beam are convenient to disassemble and replace, and the high-alkalinity rotary kiln silicon nitride and silicon carbide combined bricks on the mold frame and the elastic mold frame are convenient to disassemble and clean.

This utility model discloses a laser triangulation ranging device and system; relating to the field of laser ranging technology; including a laser for emitting laser light towards the object being measured; a light-receiving lens assembly for receiving the reflected laser light from the object being measured and correcting and focusing the reflected laser light spot; the light-receiving lens assembly includes a focusing lens and multiple correction elements; the light spot of the reflected laser light from each correction element is corrected in different properties and falls onto the light-receiving element; this solution improves the structure of the traditional laser triangulation ranging optical path by correcting the light spot of the reflected laser light spot in different properties through the light-receiving lens assembly, ensuring measurement accuracy, reducing costs, and effectively accelerating assembly efficiency; by increasing the light spot size in the laser transmission direction at the position of the light-receiving element through the light-receiving lens assembly, the center of the light spot does not need to be aligned with the center of the light-receiving element to be detected, reducing the structural accuracy of the laser triangulation ranging device and improving assembly efficiency.

The present application discloses a display module and a preparation method thereof, and a display device, comprising a first substrate and a second substrate; a sealed cavity formed by the alignment of the first substrate and the second substrate is filled with ink; an isolation retaining wall is arranged between the first substrate and the second substrate to form a plurality of pixel units; the isolation retaining wall comprises a first main body arranged on the first substrate and a second main body arranged on the second substrate, and a groove matching the first main body is arranged on the second main body; there is a gap between the first main body and the groove. By forming a gap between the first main body and the second main body, the ink can flow between different pixels when filling, and during the display process, the difficulty of ink particles moving between different pixels increases.

The invention discloses a metal fatigue testing machine and a fatigue testing method, which can test the bending fatigue strength of a rectangular thin-plate metal specimen. By clamping the two ends of the specimen and applying a load, under the action of an alternating load, the stress level of the specimen is lower than the yield limit of the material, and after a long period of repeated stress cycles, the bending fatigue strength of the rectangular thin-plate metal specimen is tested. The load and bending stress can be adjusted, and the frequency can be adjusted at will. It saves electricity and does not require a water source, and has a low cost of use, and the power of a general motor is only a few kilowatts or a few hundred watts. It can realize high-load, high-efficiency, high-precision, and low-consumption experiments, thereby shortening the experimental time and reducing the experimental cost. The parts are less damaged and have a long service life, and the motor that is almost maintenance-free can be used uninterruptedly for a long time. The installation and maintenance are simple and convenient, and there is no need to frequently stop the machine to replace hydraulic oil and the like, and the subsequent motor maintenance cost is almost zero, and the maintenance cost is low. It uses electric energy, which is clean and pollution-free and stable.

The invention relates to semiconductor manufacturing equipment which comprises an equipment body, a vacuum pressure gauge and a heat dissipation piece, a vacuum cavity is formed in the equipment body, the vacuum pressure gauge is used for measuring the pressure of the vacuum cavity and is provided with a measuring cavity, the heat dissipation piece comprises a shell connected between the equipment body and the vacuum pressure gauge, and a heat dissipation cavity is formed in the shell. And the heat dissipation cavity is used for communicating the vacuum cavity with the measurement cavity so as to dissipate heat of the polymer entering the measurement cavity from the vacuum cavity. According to the semiconductor manufacturing equipment disclosed by the invention, the polymer entering the vacuum pressure gauge is subjected to heat dissipation through the heat dissipation piece, so that the polymer is gathered in the heat dissipation cavity after entering the heat dissipation cavity by utilizing the characteristic that the gathering speed of the polymer in a low-temperature environment is higher than that in a high-temperature environment; the polymer entering the measuring cavity of the vacuum pressure gauge can be reduced to a great extent, it is guaranteed that the polymer does not cause reduction of the precision and sensitivity of the vacuum pressure gauge, the service life of the vacuum pressure gauge is prolonged, and the frequency of maintaining the vacuum pressure gauge is reduced.

The invention discloses a fastening matching structure of a metal rear bumper and a radar support and a vehicle. The fastening matching structure comprises a metal rear bumper body, the radar support and an annular elastic fastener. A mounting part with a first buckling groove is formed on the metal rear protection body, the radar bracket is matched with a connecting part, a buckling bulge is convexly arranged on the connecting part, a positioning convex rib is formed on the outer side wall of the connecting part, and a second buckling groove is formed on the inner side wall of the fastener; and the fastener is sleeved on the connecting part, and the second buckle groove is clamped with the positioning convex rib, so that the fastening connection of the fastener, the connecting part and the positioning convex rib is realized. According to the structure, the assembling defects of glue joint, welding and traditional buckling are overcome, no special tool is needed, assembling is efficient, the cost is low, the assembling precision and stability are improved through double clamping, vibration resistance and looseness prevention are achieved, and the radar detection precision is guaranteed.

The utility model discloses a hydraulic support adjusting and moving device, which relates to the technical field of coal mine engineering and comprises a main platform, a transition platform is arranged on the rear side of the main platform, the left side of the transition platform is fixedly connected with an inclined shovel plate through an arc platform, a traction arm is arranged on the right side of the transition platform, and a supporting device is further arranged on the right side of the transition platform. Bottom lifting supporting legs are arranged in the rear side of the main platform, a deviation adjusting device is arranged on the left side of the main platform, a crawling square box is arranged at the bottom end of the main platform, and a hydraulic system is arranged in the main platform. The hydraulic system is arranged as a power source and matched with the traction function of the traction arm and the arc-shaped guide rail structure of the arc-shaped platform, automatic direction adjusting and transferring of the hydraulic support from the working face to the platform are achieved, the working efficiency is improved, manual intervention is reduced, and the operation risk is reduced; through the design of the top supporting device, the top supporting device can be telescopically adjusted according to the condition of a roadway top plate, so that stable supporting force is provided.

The present invention discloses a method for correcting the measured values ​​of the parameters of the thermal system of a power station based on automatic differentiation, comprising: constructing a parameter measurement balance relationship model of the thermal system of a power station according to the arrangement of the thermal system and measuring instruments of the power station studied in practice; obtaining the measured value data of each measuring point under a certain working condition, generating the mean and covariance matrix of the measured value; calculating the Jacobian matrix of the residual of the system balance equation with respect to the measuring point variables by the automatic differentiation technology; constructing a constrained optimization problem with respect to the correction amount of each measuring point of the system, solving the correction amount of the measured value of the measuring point; calculating the gross error criterion, judging whether the measured value of each measuring point has a gross error, locating and eliminating the possible gross error; after eliminating the gross error in the measured data, obtaining the corrected measured value of each measuring point variable of the system through the correction amount calculation result. The present invention can speed up the calculation speed of the measured value of the thermal system of a power station and improve the accuracy of the calculation result.

The invention discloses a support assembly and a camera module, and belongs to the technical field of camera modules. The support assembly comprises a first support and a second support, wherein the first support is provided with a first guide groove; the second support is arranged opposite to the first support, and a second guide groove is formed in the second support; the third support is arranged between the first support and the second support, a first supporting piece and a second supporting piece are arranged on the two sides of the third support respectively, the first supporting piece abuts against the interior of the first guide groove, and the second supporting piece abuts against the interior of the second guide groove. According to the support assembly and the camera module provided by the invention, the precision and reliability of anti-shake movement can be improved, the assembly operation is simplified, and the assembly efficiency is improved.

The application discloses a mode spot converter based on proton exchange and a lithium niobate film, which comprises a lithium niobate film, a proton exchange waveguide, a silicon dioxide waveguide, wherein the lithium niobate film comprises a stepped film section, a flat film section and a last film section; the stepped film section has multiple steps, the tread of each step is a plane, and the kick of each step is a concave curve; the tread of the highest step of the stepped film section is flush with the top surface of the flat film section; and the last film section forms an LN ridge waveguide; the proton exchange waveguide is formed on the stepped film section and the flat film section of the lithium niobate film; the stepped film section forms a stepped section of the proton exchange waveguide, and the flat film section forms a transition section of the proton exchange waveguide; and the silicon dioxide waveguide serves as an upper cladding layer of the stepped section of the proton exchange waveguide. The application is used for end face coupling between a chip and an external optical fiber, and has the advantages of high transmission efficiency, small light leakage and low transmission loss.