426results about How to "Guaranteed performance" patented technology

The application belongs to the technical field of polymer materials, and particularly relates to a high-performance fiber composite material and a preparation method thereof. The preparation method of the high-performance fiber composite material comprises the following steps: adding pretreated aluminum oxide whiskers into a solvent, then adding pretreated carboxymethyl cellulose and gallic acid, and heating to reflux to obtain modified aluminum oxide whiskers; then mixing epoxy resin, the modified aluminum oxide whiskers, a curing agent and an accelerator uniformly to coat a film to obtain a resin adhesive film; and compounding the resin adhesive film and carbon fibers through hot pressing to obtain carbon fiber prepreg, and heating and curing the obtained prepreg to obtain the high-performance fiber composite material. The fiber composite material obtained by the application not only has high strength and rigidity, but also has excellent toughness, can effectively resist the impact of the external environment, has oxidation resistance and long-term stability, and has a wide application prospect in the fields of aerospace and new energy equipment.

The utility model provides a kind of viscous damper mounting structure, including first mounting beam and second mounting beam, the first mounting beam is equipped with accommodating space, the inboard of accommodating space is equipped with viscous damper, the upper of second mounting beam is provided with first embedded part, the bottom of first embedded part is fixedly installed with fixed frame.The utility model is through the setting of first connecting rod, mounting sleeve, second connecting plate and connecting mechanism, when using, the cylinder barrel of viscous damper and fixed frame branch can be movably connected, the movable connection of both can also realize the movable connection of cylinder barrel of viscous damper and mounting beam, allow cylinder barrel to be multi-directional displacement with building structure in earthquake and not be restrained, while avoiding that cylinder barrel bears too large bending moment and torque, reduce the problem that cylinder barrel appears deformation or damage, to effectively guarantee the performance and durability of viscous damper.

The utility model relates to concrete admixture adding equipment technical field provides a quantitative filling device for concrete admixture production, including base frame, be located on the admixture buffer tank of base frame and the spiral conveyor that connects in proper order first and last, quantitative conveying component, vibration subassembly, agitator jar. The inlet of spiral conveyor is located at the outlet of admixture buffer tank. The weighing assembly is equipped below the vibration subassembly, the supporting seat is equipped below the weighing assembly, and the supporting seat is height -adjustable with base frame. Quantitative conveying component includes upper connecting pipe, lower output pipe and quantitative valve connected between upper connecting pipe and lower output pipe, and the outlet end of lower output pipe is equipped with the blocking plate of pivotal connection. Admixture quantitative delivery reaches in lower output pipe, and the blocking plate is driven to open the outlet of lower output pipe, and the weighing assembly weighs the admixture falling on the vibration subassembly. The utility model guarantees the measurement accurate condition of admixture addition, avoids the dust floating caused by the leakage of admixture, and guarantees the construction environment.

The application discloses a kind of multilayer superimposed cylinder suction type vortex hydroelectric generation device systems, belong to hydroelectric generation equipment technical field, it is related to new clean energy innovation technology.The system uses multistage multilayer superimposed lever mechanics structure, the layer of power generation unit, interval distance and water turbine impeller diameter are within the scope of the patent protection;Based on fluid mechanics and Bernoulli principle, construct by high to low by wide to narrow "tapered flow guide-vortex acceleration-suction gain "tornado type "vortex flow technical scheme, three-stage potential energy conversion system, by continuity equation, vortex dynamics etc. Theory support, realize the efficient progressive conversion of water flow potential energy to kinetic energy.Single power generation unit is composed of vortex generator, mixed-flow water turbine impeller and vertical (vacuum) siphon pipe, through large-diameter water turbine multistage multilayer superimposed lever amplification effect, realize single water potential energy after superposition times conversion and multiple reuse, adapt to multi-field hydroelectric generation scene.The application deeply integrates the core principles of multi-disciplinary and new energy innovation highlights, solves the problem of low efficiency, low power expansion, low energy utilization rate of traditional water turbine single-layer device, and has significant energy-saving and emission-reducing benefits, social value and economic benefits.

The invention relates to a signal probability calculation method for reducing correlation errors of digital circuit signals, which comprises the following steps of: acquiring a circuit netlist file, and analyzing and extracting circuit topological structure information; constructing a directed acyclic graph of a circuit structure according to the circuit topological structure information, performing hierarchical division on the circuit structure, and searching fan-out nodes; calculating an initial signal probability result of each node of each level by utilizing a directed acyclic graph and combining a signal probability calculation basic formula; calculating a signal probability result of each node when different signal probabilities are set at the fan-out node, and performing weighted calculation to obtain a weighted signal probability result of each node; calculating an initial correction signal probability result of each node of each level; counting an initial signal probability result, a weighted signal probability result and an initial correction signal probability result, and calculating a final signal probability result of each node of the circuit in combination with an inference rule and a statistical result. According to the method, the accurate signal probability result of each unit of the circuit can be calculated.

This invention discloses a large-tapered anti-backlash tailstock adapted to a four-axis rotary table, specifically relating to the field of tailstock technology. It includes a base with a positioning and locking assembly. The positioning and locking assembly includes a central inner liner plate located in the middle of the base, with a mounting cavity in the center of the inner liner plate. An axially adjustable crossbar is inserted into the mounting cavity. This invention employs a dual-redundant structure of hydraulic and mechanical locking to fundamentally prevent the tailstock from backing up under force. The locking force is uniform and sufficiently rigid, achieving zero axial displacement positioning of the tailstock rod, thus laying a solid foundation for machining accuracy. Simultaneously, the dual locking, combined with a two-stage adjustment mechanism of coarse and fine axial adjustment, allows for deep synergy between adjustment and locking functions. Once adjusted to the correct position, the tailstock is quickly locked, improving positioning accuracy and making the anti-backlash effect more stable.

The utility model relates to the technical field of box-type electric furnaces, and discloses a box-type electric furnace stabilizing device which comprises a box body, a control panel is fixedly connected to the outside of the box body, a rotating mechanism is fixedly connected to the inside of the box body, a mounting block is fixedly connected to the outside of the box body, a heat insulation plate is fixedly connected to the outside of the mounting block, and the heat insulation plate is fixedly connected to the inside of the box body. A cleaning mechanism is fixedly connected to the interior of the box body; and the rotating mechanism comprises an air cylinder, the outer portion of the air cylinder is fixedly connected with a sliding block, the outer portion of the sliding block is slidably connected with a fixing block, the other end of the sliding block is fixedly connected with a connecting rod, and the outer portion of the connecting rod is fixedly connected with a connecting block. According to the utility model, the air cylinder drives the connecting rod to move, so that the connecting block drives the rack plate to move, the gear drives the follow-up rod to move, and then the L-shaped plate drives the bearing table to rotate, so that the position of a sample can be adjusted at multiple angles, the heating is more uniform, and the heating effect is improved.

This application discloses a dynamic form construction method, device, and medium, relating to the fields of software engineering and enterprise application development technology. The method includes: receiving a form request containing a view model identifier and request type based on a preset view parsing and execution engine; parsing a predefined view model according to the identifier to obtain its metadata, which defines the target business entity, view data object structure, field set, and filtering conditions; for data query requests, dynamically constructing and executing SQL statements based on the aforementioned metadata, obtaining raw data, performing aggregation and transformation, and generating structured view data that meets the front-end rendering requirements for return; for data submission requests, converting the data submitted from the front-end back into domain model data according to the same view model, and calling the business entity engine service to complete business logic verification and persistent storage, thereby achieving dynamic generation of the form view, decoupling of front-end and back-end logic, and ensuring business consistency.

The application discloses a full-wrapping concrete truss structure and a construction method thereof, and belongs to the technical field of building structures. The full-wrapping concrete truss structure comprises a steel pipe truss assembly arranged between a plurality of steel plates, a wrapping assembly arranged outside the steel pipe truss assembly, and a concrete layer arranged outside the wrapping assembly. The construction method comprises the following steps: S1, preparing a top chord, a bottom chord, a vertical rod and a horizontal rod, wrapping the rods with a reinforcing mesh and welding to obtain a steel pipe truss shell; S2, arranging a diagonal web member assembly inside the shell and arranging a connecting mesh outside the shell to form a steel pipe truss monomer; S3, bolt connecting a plurality of monomers and bolt connecting the steel plates and the monomers at edges to form a steel pipe truss structure; and S4, vibrating the steel pipe truss structure after concrete partition pouring to obtain the full-wrapping concrete truss structure. The application can realize full wrapping of the steel pipe, ensure that the concrete layer is tightly bonded with the steel pipe, and improve the stability and safety of the structure.

The application discloses a water-cooled motor sleeve and a motor, and relates to the technical field of motors. The water-cooled motor sleeve comprises an inner shell, an outer sleeve, a blocking strip, a stop rib and two sealing rings. The outer sleeve is sleeved on the outer shell, and is arranged at intervals from the inner shell. The two sealing rings are oppositely arranged, and are connected between the outer sleeve and the inner shell. The outer sleeve, the inner shell and the two sealing rings jointly enclose a water-cooled cavity. The stop rib is connected between the two sealing rings, and is connected between the outer sleeve and the inner shell. The blocking strip is connected between the outer sleeve and the inner shell, and is connected with the stop rib, so as to divide the water-cooled cavity into two water flow channels arranged outside the inner shell. The water flow channels comprise water inlet channels and water outlet channels. The length of the water inlet channels is equal to the length of the water outlet channels. The cross-sectional area of the water inlet channels is greater than the cross-sectional area of the water outlet channels. The water-cooled motor sleeve can ensure uniform cooling around the motor body, so as to ensure the performance of the motor body, has good cooling effect and high safety.

The application discloses a prediction method for the relationship between welding repair defects and fatigue life of TC17 titanium alloy blades, and comprises the following steps: step one, establishing a fatigue life prediction model related to repair defects; step two, preparing a rotary bending fatigue sample; step three, heat treating a surfacing sample; step four, processing the rotary bending fatigue sample; step five, testing the rotary bending fatigue; step six, analyzing a fracture and counting defects; and step seven, establishing a rotary bending fatigue life prediction model. The application selects an electric arc welding wire repair test block, tests the rotary bending fatigue performance of the test block, observes and counts the defect morphology, size and position of the fracture, analyzes the corresponding relationship between the defects and the fatigue life, establishes a fatigue life prediction model related to the repair defects, and determines the influence of the pore defects on the fatigue life of the repaired blade through the model.

The invention discloses a robot navigation method based on reinforcement learning security constraint and danger perception, and relates to the technical field of robots and artificial intelligence, and the robot navigation method comprises the following steps: when a robot is controlled to execute a navigation task in a target area, using a security filter SF to perform security constraint on the execution action of the robot; and when the robot executes the navigation task, the danger perception virtual robot HAVR is utilized to obtain experience in the dangerous area so as to enhance the ability of the robot to explore in the dangerous area. The action generated by reinforcement learning can be dynamically adjusted, so that the action meets the safety constraint, and the safety of the robot in the reinforcement learning training process is further enhanced; by introducing the HAVR with risk-driven rewards, the robot can still obtain experience in a dangerous area while introducing security constraints, and the exploration security of the robot is further enhanced while the performance of the model after convergence is ensured.

The utility model discloses a dry-type transformer which comprises a base, a transformer body installed on the top of the base, a front clamping piece and a rear clamping piece, the front clamping piece and the rear clamping piece are arranged on the outer side of the transformer body respectively, a plurality of inner hexagon bolts are arranged between the adjacent front clamping piece and the rear clamping piece in a penetrating mode, and the outer sides of the inner hexagon bolts are in threaded connection with hexagon nuts. A cap used for limiting the hexagonal nut is installed at one end of the inner hexagonal bolt, a hexagonal groove matched with the hexagonal nut is formed in the inner side of the cap, a square rod is arranged in the middle of the hexagonal groove, and a plurality of elastic pieces are arranged on the outer side wall of the square rod. The nut cap, the elastic piece, the square rod and the inserting groove can prevent the hexagonal nut from rotating in the circumferential direction, the loosening risk of the hexagonal nut in the long-term vibration environment is effectively restrained, and it is guaranteed that the hexagonal nut and the inner hexagonal bolt always improve enough axial clamping force; therefore, the iron core of the transformer main body is prevented from loosening due to attenuation of clamping force, and the performance and long-term reliable operation of the transformer main body are guaranteed.

The application discloses a one-way valve test method and device based on a hydraulic integrated valve block and belongs to the technical field of intelligent detection of coal mine supporting equipment. The method comprises the following steps: collecting hydraulic system operation parameters in real time through a fault sensing sensor, mapping the sensor data into initial parameters of a hydraulic principle diagram, and outputting a hydraulic principle diagram conforming to actual working conditions; generating an initial layout of the hydraulic integrated valve block through a mapping rule to obtain a three-dimensional layout design of the hydraulic integrated valve block; performing internal oil hole communication design of the hydraulic integrated valve block through external circulation to obtain the internal oil hole communication design of the hydraulic integrated valve block; performing software aided design analysis on the hydraulic integrated valve block to obtain a simulation model of the hydraulic integrated valve block, and realizing one-way valve test based on the hydraulic integrated valve block. The high-reliability one-way valve test device provided by the application can meet the requirements of standard one-way valve durability performance test, and the fault diagnosis accuracy is high.

The utility model discloses a motor end cover structure, which relates to the technical field of motor end covers and comprises a motor end cover main body, a plurality of fixing plates distributed in an annular array are mounted at the rear part of the outer surface of the motor end cover main body, and mounting holes are formed in the plurality of fixing plates. The upper portion and the lower portion of the front inner wall of the motor end cover body are each provided with a plurality of heat dissipation holes, the heat dissipation holes extend to the front side of the motor end cover body, the upper portion and the lower portion of the front end of the motor end cover body are each provided with a screen, and the left portion and the right portion of the front end of the motor end cover body are jointly provided with a U-shaped frame. And a connecting shaft is movably arranged in the U-shaped frame in a sleeving manner. According to the utility model, the baffle plate, the brush and the connecting shaft cooperate with each other to block the front of the screen, so that dust, metal chips or other impurities are prevented from passing through the heat dissipation holes to pollute the interior of the motor, and the performance and normal use of the motor are ensured.

This application provides a display panel and a display device, relating to the field of display technology. The display panel includes a substrate, a transistor located on one side of the substrate, and a reflective structure. The transistor includes a semiconductor structure, and the reflective structure is located on the side of the semiconductor structure away from the substrate. The reflective structure includes a side surface, which forms an acute angle with the plane of the substrate. Specifically, along a direction perpendicular to the plane of the substrate, the side surface of the reflective structure at least partially overlaps with the semiconductor structure of the transistor. Based on this, the side surface of the reflective structure can reflect X-rays. By providing the reflective structure with the aforementioned side surface, the display panel can suppress X-ray damage to the semiconductor structure, ensuring the performance of the transistor and thus ensuring the performance of the display panel.

The application discloses a heat treatment method of a titanium alloy material for an aviation aircraft, and comprises the following steps: S1, heating forging; S2, die forging; and S3, double annealing heat treatment. The heat treatment method optimizes and adjusts the heat treatment process in the preparation process of the TC21 titanium alloy, mainly optimizes and adjusts the cooling mode, the holding time and other parameters of the double annealing, so that the cooling speed is adjusted, the secondary lamellar or spherical alpha phase is obtained in the first annealing, the acicular alpha phase is obtained in the second annealing, the strength of the titanium alloy is improved through the content of the alpha phase, and the prepared TC21 titanium alloy meets the high performance requirements of strength greater than or equal to 1200 MPa, yield greater than or equal to 1100 MPa and A greater than or equal to 8.

The application discloses a kind of based on GAN's forgetting measure model, including the self-encoding device connected in turn, the original model obtained using training set training ResNet18, and the forgetting model obtained after applying forgetting strategy on original model, self-encoding device contains an encoder and a decoder, the first layer of encoder is two-dimensional convolution layer, the channel number of input is 3, and the output channel number is 64.Convolution kernel size is 3x3, and step is 1, and padding is 1.Activation function is LeakyReLU, when input value is less than 0, set output to 0.2 times input value, the second layer is two-dimensional convolution layer, and the channel number of input is 64, and the output channel number is 128.Convolution kernel size is 4x4, and step is 2.The present application can solve the technical problems that the accuracy and recall rate of existing forgetting measure model cannot accurately measure whether the processing ability of model to the data is completely eliminated after the specific data is forgotten, and the existing index cannot accurately measure the change of processing ability of model to past data.

The utility model relates to the field of stamping devices, and discloses a novel hardware stamping part surface scratch prevention device which comprises a bottom plate and a stamping seat, the top of the bottom plate is fixedly connected with a supporting column, the bottom of the supporting column is fixedly connected with a hydraulic rod, and the driving end of the hydraulic rod is fixedly connected with a stamping block. Two rotating shafts are rotatably connected to the interior of the stamping block, rotating bending shafts are fixedly connected to the exteriors of the rotating shafts, a second convex button is fixedly connected to the front side of each rotating bending shaft, a reset button is fixedly connected to the front side of each rotating bending shaft, and two first convex buttons are fixedly connected to the front side of the stamping block; and the front side of the stamping block is fixedly connected with a fixed block. According to the bending device, the two rotating bending shafts are driven by the hydraulic rod to rotate in a contact mode to bend a workpiece, workpiece surface scratching possibly caused by direct contact extrusion is effectively avoided, and the surface quality of a product is greatly improved.

The application relates to the technical field of medical devices, and provides a developing ring crimping device, which comprises a body, a core mold rotatably arranged on the body, a first accommodating hole for passing a guide wire or a catheter being arranged on the core mold, and a plurality of electromagnetic crimping pieces arranged along the circumference of the first accommodating hole, and a permanent magnet being arranged on the body and matched with the electromagnetic crimping pieces; after the electromagnetic crimping pieces are electrified, the permanent magnet and the electromagnetic crimping pieces repel each other, so as to drive the electromagnetic crimping pieces to move towards the direction of being close to the central axis of the first accommodating hole. The developing ring crimping device provided by the application is controllable in crimping force compared with the use of a crimping clamp, can make the developing ring be tightly crimped without damaging the pipe body, and can uniformly crimp the whole circumference of the developing ring along with the rotation of the core mold, so that non-circular deformation caused by non-uniform circumferential force is avoided, and the performance of the guide wire / catheter is guaranteed.

The application relates to the field of mobile communication, and discloses a method and device for monitoring data packet disorder in a mobile network, a computer readable medium and an electronic device. The method is executed by a first user plane node in a user plane, and comprises the following steps: when the first user plane node receives a disorder statistics request sent by a target network element in a control plane, sending a notification message containing a differentiated service code point to a second user plane node in the user plane; receiving a plurality of echo messages sent by the second user plane node in sequence, wherein the echo messages comprise a message sequence number and the differentiated service code point; determining a disorder monitoring result according to the message sequence number in each received echo message and the normal order of the message sequence numbers in the plurality of echo messages; and reporting the disorder monitoring result to the control plane, so that the control plane determines the disorder condition of the data packet according to the disorder monitoring result. The method can realize monitoring of the disorder condition of the data packet, and provide data support for reliable transmission of the mobile network.

The utility model provides a cooling device for turning blade production, which relates to the field of cooling equipment for turning blade production, and comprises a cooling pool, a pool body, a mesh basket for bearing a turning blade, a gantry elevator, a gantry frame and an electric hoist for lifting the mesh basket, the cooling assembly comprises a cooling pool; the heat conduction oil is added into the inner cavity of the pool body of the cooling pool and used for cooling the turning blades, the heat conduction oil has good heat conduction performance and can rapidly take away heat generated in the production process of the turning blades, effective cooling of the turning blades is achieved, cooling liquid in the cooling assembly circulates between the liquid storage tank and the coil pipe through the first circulating pump, and cooling efficiency is improved. When the cooling liquid flows in the coil pipe, heat exchange can be carried out between the cooling liquid and the heat conduction oil passing through the cooling pool, heat of the heat conduction oil is taken away, the temperature of the heat conduction oil is further reduced, and therefore a proper cooling environment is continuously provided for the turning tool blade, and the cooling efficiency is improved.

The invention provides vehicle window glass and a vehicle window glass assembly, the vehicle window glass comprises a signal transmission area, the installation angle of the vehicle window glass loaded on a vehicle is larger than or equal to 23 degrees, any position point in the signal transmission area has a corresponding first curvature radius in a first direction and has a corresponding second curvature radius in a second direction, and the first curvature radius is larger than the second curvature radius. The first direction is perpendicular to the second direction; the first curvature radius is greater than or equal to 4700 mm, and the second curvature radius is greater than or equal to 7000 mm; the range of the first curvature radiuses at all the position points in the signal transmission area is smaller than or equal to 500 mm, and the range of the second curvature radiuses at all the position points in the signal transmission area is smaller than or equal to 200 mm, so that the sub-image deviation angle can be reduced without installing a wedge-shaped film.

The utility model relates to the technical field of cable manufacturing, and discloses a double-layer co-extrusion sheath cable which comprises a conductor, a conductor shielding layer, a crosslinked polyethylene insulating layer, an insulation shielding layer, a semi-conductive water-blocking tape, a soft round copper wire, a soft pure copper tape, a non-conductive water-blocking tape and a CPP tape from inside to outside. According to the double-layer co-extrusion sheath cable, the inner sheath layer and the outer sheath layer are arranged, the inner sheath layer is made of the flame-retardant PVC material with the oxygen index larger than or equal to 32%, a carbonization layer can be rapidly formed under the condition of high temperature or open fire, oxygen is effectively isolated, flame-retardant gas is released, and flame is prevented from spreading towards the interior of the cable, and the outer sheath layer is made of the high-hardness MDPE material. Although the flame retardance is general, the flame diffusion speed can be slowed down, and through the synergistic effect with the inner layer PVC, the overall flame retardant grade of the cable reaches the V-0 grade (UL 94 standard), the high-flame-retardant scene requirement is met, and the flame retardant property is further remarkably improved.

An ultrasonic cleaning device for aluminum alloy wheels includes two cleaning tanks, I and II, arranged horizontally side by side. Each tank includes a body. A support plate for placing the aluminum alloy wheel is installed in the lower part of the tank body. The support plate is horizontally positioned and has water filter holes. A support shaft is vertically installed through the bottom wall of the tank body. A horizontally positioned support rod is installed on the top of the support shaft. Several ultrasonic transducers are mounted on the support rod. A drive device is installed on the outer wall of the tank body to drive the support shaft and the ultrasonic transducers to rotate and adjust their positions via the support rod. A rotary dynamic seal is installed at the junction of the support shaft and the tank body. This device is easy to operate, highly efficient in cleaning, and can thoroughly clean all parts of the alloy wheel using ultrasonic waves, removing impurities without dead angles. The process is gentle and does not damage the appearance or performance of the wheel, helping to ensure the product quality of the aluminum alloy wheel.

The application relates to the technical field of image processing, in particular to an image super-resolution reconstruction method based on a multi-scale content perception mixer, which is realized by using an adaptive processing mechanism. The method comprises the following steps: shallow feature extraction is performed on a low-resolution image to be reconstructed, so as to obtain an initial shallow feature map; feature enhancement based on a feature pyramid and an attention mechanism is performed on the shallow feature map, so as to obtain a deep feature map; multi-scale content perception prediction is performed based on the deep feature map, so as to generate guide information for guiding calculation allocation, the guide information comprising a window classification binary mask and a window size; different image regions are allocated to different calculation paths for processing based on the guide information; the feature maps output by the calculation paths are recombined and fused, and then enlarged to a target resolution, so that a high-resolution image is finally obtained. The method realizes accurate classification of image regions and on-demand allocation of calculation resources, and significantly reduces the calculation complexity and the memory occupation.

The invention relates to the technical field of communication, and particularly provides a multi-base-station cooperative sensing networking planning method and device, a medium and a product. The multi-base-station cooperative sensing networking planning method comprises the following steps: constructing a multi-base-station sensing model in a multi-base-station cooperative sensing scene; the multi-base-station sensing model is used for describing the whole process that the signal is transmitted from each base station, reflected by the unmanned aerial vehicle and received by the base station; based on a multi-base-station sensing model, determining a mapping relation between the station spacing and the sensing performance index; and solving the perception performance boundary based on the mapping relation, and determining the target station spacing based on the perception performance boundary. According to the method, the problem of mutual interference between the base stations is solved through model construction, performance analysis and station spacing optimization, and the mutual interference between the base stations can be minimized while network coverage and performance are ensured, so that the sensing performance and communication quality of the whole network are improved.

This invention provides a chemical mechanical polishing (CMP) slurry and its application. The CMP slurry comprises: a catalyst, a stabilizer, an oxidant, a pH adjuster, abrasive particles, a corrosion inhibitor, and water. The corrosion inhibitor is a nitrogen-containing heterocyclic carboxylic acid compound, wherein the nitrogen-containing heterocyclic carboxylic acid compound includes at least one selected from nicotinic acid, isonicotinic acid, pyridinecarboxylic acid, imidazocarboxylic acid, pyrazolecarboxylic acid, 3-pyridineacetic acid, 3-pyridinepropionic acid, 3-methyl-2-pyridinecarboxylic acid, and L-piperidine acid. The CMP slurry provided by this invention can simultaneously polish tungsten and silicon oxide, and can also control the polishing rate of silicon oxide while inhibiting tungsten corrosion, thus making it suitable for different application scenarios. In addition, the CMP slurry has good stability and can maintain its performance even after long-term standing.

The utility model provides a chain saw which solves the problem that in the prior art, the oil pumping amount of a lubricating system can not be adjusted according to actual requirements. The cutting assembly comprises a driving device and a cutting structure in driving connection with the driving device; the lubricating system comprises a liquid supply device and a pump body, and the pump body is used for pumping a lubricating medium stored in the liquid supply device into the cutting assembly; the pump quantity adjusting assembly comprises a first adjusting structure, the first adjusting structure is electrically connected with the pump body, the first adjusting structure has multiple quantity adjusting modes, and different quantity adjusting modes of the first adjusting structure correspond to different conveying quantities of the pump body.