173results about How to "Act quickly" patented technology

The invention provides a visual fault detection method and system for an air conditioning unit, and the method comprises the steps: collecting multi-source data of the air conditioning unit, storing the multi-source data in a matrix form, and then carrying out the preprocessing of the stored data; carrying out feature adaptive fusion to obtain a comprehensive feature vector, and carrying out feature enhancement, dimensionality reduction and regularization processing on the comprehensive feature vector to obtain a final comprehensive feature vector; constructing a causal relationship model, calculating a causal effect, carrying out multi-level fault diagnosis according to a result of the causal effect, and constructing a fault prediction model to carry out fault inference; performing local model training on each edge computing node according to results of the fault diagnosis and fault prediction model; and constructing a fault thermodynamic diagram generation algorithm to perform visualization processing on the fault, designing a multi-mode intelligent interaction interface, and adjusting a visual interface and parameters according to behaviors and feedback of the user. According to the method, multiple innovative technologies such as multi-source data fusion, edge calculation, causal inference and federated learning are introduced, so that the system fault positioning and prevention capabilities are improved.

The invention relates to the field of forestry pest prevention and control, and discloses a juglans sigillata forest intelligent pest prevention and control system and method.The juglans sigillata forest intelligent pest prevention and control system comprises a data acquisition module used for collecting basic information of a juglans sigillata forest, and the basic information comprises meteorological environment parameters, soil physical and chemical properties and in-forest visual image data; the identification and analysis module is used for deeply analyzing data characteristics of the basic information, discriminating types and severity of diseases and pests, predicting potential occurrence risks of the diseases and pests and forming an evaluation result; and the early warning response module is used for presetting a risk level threshold value and rule logic and generating an early warning signal of a corresponding level according to an evaluation result. A data acquisition module integrating multiple types of monitoring units and communication units is constructed, so that the juglans sigillata forest can be sensed in all directions, the limitation of manual inspection is eliminated, and the problems of inaccurate monitoring and difficulty in data backtracking are solved; and the identification analysis module comprises sample management, model training and data analysis and prediction.

The invention discloses an unmanned aerial vehicle bee colony formation recognition method based on vision, aiming at the specific requirements of anti-unmanned aerial vehicle bee colony system formation recognition, an unmanned aerial vehicle image data set construction technology, a Yolov5-based unmanned aerial vehicle target detection technology and a Resnet50-based unmanned aerial vehicle formation classification technology are adopted, so that a photoelectric system can obtain an unmanned aerial vehicle bee colony image after the unmanned aerial vehicle bee colony image is obtained; through the steps of unmanned aerial vehicle image extraction, image binaryzation, formation classification and the like, the unmanned aerial vehicle formation is accurately and quickly identified online, so that the threat degree of the unmanned aerial vehicle formation is judged. The method is easy to implement, low in cost and intelligent, and the problem that a traditional photoelectric system cannot automatically recognize the swarm formation of the unmanned aerial vehicle is solved.

The invention discloses a beneficiation method for efficiently recovering barite from heat treatment drilling waste. The beneficiation method comprises the following steps that (1) the drilling waste containing the barite is subjected to wet screening classification; (2) performing magnetic separation on the undersize product to obtain a magnetic product and a non-magnetic product; (3) carrying out primary roughing and primary concentration on the non-magnetic product to obtain a barite powder product 1; and (4) the roughing tailings are subjected to scavenging for three times, scavenged concentrates are combined and then subjected to fine selection for two times, and a barite powder product 2 is obtained. According to the method, barite in the heat treatment drilling waste is efficiently recycled by adopting a beneficiation method, two different grades of barite powder products are obtained and can serve as drilling fluid raw materials to be recycled, resource utilization of the waste is achieved, and meanwhile environmental hazards are reduced.

The invention discloses a coal mine fireproof simulation training method based on a virtual reality technology, relates to the technical field of coal mine fireproof simulation training, is used for solving the problem that a virtual scene and student operation are asynchronous due to sensor data delay or misalignment in the training process, and comprises the following steps: collecting action data of a student in real time; comprise posture change, hand movement and position coordinate information. Seamless synchronization of the sensor and the virtual scene is ensured through the time synchronization algorithm and the dynamic compensation model, and the safety and effectiveness of training are improved. In combination with a sliding window, a prediction algorithm and a redundancy detection mechanism, the system has high fault-tolerant capability, and training continuity and stability are guaranteed. The dynamic path planning under the fire spreading trend is realized by adopting the A * algorithm, and the guidance is quickly adjusted and corrected when the trainee deviates from the path, so that the real-time response capability and the immersion of training are improved, and the trainee is helped to quickly make a decision and act in an emergency.

The invention relates to the technical field of photovoltaic inverters, in particular to a photovoltaic inverter controller parameter identification method and system, and the method comprises the steps: building a mathematical model of a photovoltaic inverter controller, and determining controller parameters needing to be identified; the mathematical model is converted into a difference equation through transformation decoupling operation; the input and output quantity of an inverter controller is obtained in real time to serve as the input quantity of an identification system, and the preset performance index minimization serves as the optimal adaptive value estimation of an optimization algorithm; and stopping iteration when the parameters of the controller to be identified reach preset precision, and outputting estimated values of the parameters of the controller. The method has the advantages that the optimal solution is found through the idea of minimizing the residual module value, the randomness of identifying the parameters of the controller is greatly reduced, the accuracy of the identification result is improved, online identification and synchronous identification of all the parameters can be achieved, and step-by-step identification of all the parameters is avoided.

The invention discloses a hopper type white spirit retort feeding device, and particularly relates to the technical field of white spirit production, the hopper type white spirit retort feeding device comprises a storage bin and a support frame, a fermented grain feeding device is fixedly mounted on the inner surface of the support frame, and the output end of a spiral auger is communicated with the fermented grain feeding device; the fermented grain feeding device comprises a storage hopper fixedly mounted on the inner surface of the supporting frame, a caking dispersing structure is arranged on the inner surface of the storage hopper, and a spreading structure is fixedly mounted at the lower end of the storage hopper. According to the hopper type liquor retort feeding device, sorghum is scattered under the action of the driving motor and the caking dispersing structure, the situation that the sorghum caked due to cooking enters a liquor retort is avoided, meanwhile, the sorghum is further scattered under the action of the spreading structure and then is evenly spread into the liquor retort layer by layer, the spreading uniformity of fermented grains is guaranteed, and the liquor retort feeding efficiency is improved. And the influence of uneven distribution on the taste of the wine is reduced, so that automatic steaming is realized, the participation of personnel is reduced, the potential safety hazard caused by high temperature is reduced, and the labor intensity is reduced.

The invention belongs to the related technical field of soil conditioning, and particularly relates to a soil conditioner releasing device and method.The soil conditioner releasing device comprises a frame body, an adjusting mechanism is arranged on the left side of the frame body, and a soil loosening mechanism is arranged at the lower end of the adjusting mechanism; the upper end of the soil loosening mechanism is movably connected with two rotating sleeves, and two limiting grooves are formed in each rotating sleeve. Through mutual cooperation of a first double-shaft motor, a first worm, a first transmission wheel and a second transmission wheel, the effect of driving a first rotating rod to rotate can be achieved, and through rotation of the first rotating rod, the effect of driving a discharging rotating roller arranged on each adjusting and releasing mechanism to rotate can be achieved; the soil conditioner in the material box can be quantitatively and uniformly fed into soil through the discharging pipe under the mutual cooperation of the arranged releasing groove body, the discharging groove and the adjusting block through rotation of the discharging rotating roller, and therefore the quantitative releasing process of the soil conditioner is achieved.

The invention discloses an application of a small-molecule inhibitor combined medicine in preparation of a medicine for treating multiple myeloma. The application comprises the step of combining a proteasome inhibitor or an immunomodulator with an STAT3 small-molecule inhibitor. According to the present invention, the killing effect of the STAT3 targeting small molecule inhibitor BBI608 (Napabucasin) on MM cells and MM stem cells is provided, and the STAT3 targeting small molecule inhibitor BBI608 (Napabucasin) is combined with bortezomib (BTZ) or lenalidomide (Len) to improve the synergistic killing effect on multiple myeloma (MM) cells;

The invention belongs to the technical field of battery materials, and particularly relates to a sodium ion battery positive electrode material and a preparation method and application thereof. The preparation method of the sodium ion battery positive electrode material provided by the invention comprises the following steps: 1) mixing a sodium source, a precursor and a hexavalent tellurium source, and carrying out first calcination to obtain a first calcined material; and 2) mixing the first calcined material obtained in the step 1), a metal selenium compound and an organic solvent, and performing second calcination to obtain the sodium-ion battery positive electrode material. The structure and interface stability of the material are effectively enhanced through a three-in-one modification strategy of doping the high-valence element Te6 + coating the metal selenium compound and adjusting the microstructure, and the obtained sodium ion battery positive electrode material is stable in structure, stable in interface and good in redox reversibility and has good rate capability and cycle performance.

The flotation recovery method comprises the following steps: carrying out ore grinding and dissociation treatment on raw copper ore, then carrying out roughing, and grading roughing tailings to obtain three-fraction ore pulp products of + 200 meshes, 200-400 meshes and-400 meshes; the + 200-mesh ore pulp product is subjected to coarse grain flotation, a combined collecting agent of disulfide diisopropyl xanthate and isopropyl xanthate is adopted for recycling coarse grain copper minerals, and obtained rough concentrate is returned to the ore grinding operation; carrying out fine particle flotation on the ore pulp product with the size of-400 meshes by adopting a fine particle flotation collecting agent, and combining obtained rough concentrate with copper roughing rough concentrate for concentration; ore pulp products of 200-400 meshes are directly used as tailings. According to the method, the lost coarse and fine copper minerals in the ore pulp can be intensively recovered, and the copper flotation recovery rate can be increased.

The present invention relates to a kitchen cooking appliance, in particular to a safe food processing machine, comprising a cup body and a cover body sealed with the cup body, the cup body and the cover body enclose a pulping cavity, a pulverizing device driven by a motor is arranged in the pulping cavity, and further comprising: a micro switch for controlling the power on and off of the motor; a pusher, when the cover body is closed, for triggering the micro switch to power on the motor, and when the cover body is opened, for releasing the micro switch to power off the motor; a linkage member, having a first position and a second position, when the cover body is closed, the pusher synchronously drives the linkage member to move from the first position to the second position; a reset member, when the cover body is opened, the micro switch is powered off, and the reset member resets the linkage member from the second position to the first position. The food processing machine of the present invention, when the cover is closed, realizes that the pusher triggers the micro switch to power on, and synchronously drives the linkage member to move, thereby increasing the linkage function; when the cover is opened, the linkage member will not affect the power off of the micro switch.

The invention relates to an anaerobic ammonia oxidation denitrification device and method for nitrogen-containing wastewater in a rare earth mining area, and relates to the technical field of anaerobic ammonia oxidation denitrification of nitrogen-containing wastewater. Comprising a pretreatment mechanism and a denitrification mechanism, heavy metal ions, SS and COD in wastewater are removed through the pretreatment mechanism, and a suitable production environment is provided for anaerobic ammonium oxidation bacteria through the denitrification mechanism; the method can solve the following problems in the anaerobic ammonia oxidation denitrification process of the nitrogen-containing wastewater in the prior art: a large amount of heavy metal ions contained in the wastewater inhibit the activity and denitrification efficiency of anaerobic ammonia oxidation bacteria, and excessive SS and COD are harmful to the environment and cause serious corrosion and blockage of wastewater treatment facilities; a large amount of maintenance cost needs to be consumed; the denitrification environment in the prior art is not suitable for survival of anaerobic ammonium oxidation bacteria, so that the anaerobic ammonium oxidation denitrification efficiency is reduced.

The invention provides a nano material suitable for multi-mode diagnostic imaging and targeted photodynamic (PDT) and photo-thermal (PTT) cancer therapy, and belongs to the field of nano biomedicine. According to the invention, an upconversion material (NaYF4: Yb / Er / Gd) and a photo-thermal material (Bi2Se3) are taken as a core, mesoporous silica is taken as a shell, and a photosensitizer (Ce6) and lipid / PEG and acidity-triggered membrane (ATRAM) peptide coated on the surface of the shell are loaded. The PDT and PTT synergistic anticancer effect achieved through near-infrared laser induction is achieved, magnetic resonance imaging, thermal imaging and fluorescence imaging of tumors can be achieved, and the requirement for diagnosis and treatment integration is met. In addition, the in-vivo lifetime of the nano-carrier is effectively prolonged through lipid / PEG, and aggregation and premature degradation of the nano-carrier are prevented; and the pH-mediated acidity-triggered membrane peptide is utilized to improve the uptake of cancer cells to the nano-carrier, so that the effect of the nano-carrier and the cancer cells is enhanced.

The invention relates to the technical field of underground pipe network leakage rapid repairing, in particular to a novel underground pipe network leakage rapid repairing device which comprises a pipeline, an internal metal ball is arranged in the pipeline, a compressed air bag is arranged on the internal metal ball, the compressed air bag is sleeved with water stop rubber, and a fluff layer is arranged on the outer side of the water stop rubber. The water stop rubber with the outer layer coated with the underwater adhesive is pasted into the pipeline through expansion of the air bag in the middle part, an annular body is formed, and the function of rapidly repairing the leaked pipeline is achieved under the condition that water conveying of the pipeline is not affected; by adopting the HBPA underwater adhesive, when the material is in contact with water, hydrophobic chains can be rapidly self-aggregated to form a coacervate, water molecules are replaced to an adhesion surface, exposure and increase of catechol groups are triggered, the adhesive force of various materials from low surface energy to high energy is rapidly enhanced, the sealing effect is ensured, and harmful substances are not generated.

The present application discloses a method for reducing the variable pitch load of an aircraft propeller, and relates to the technical field of propeller balance. The method comprises: obtaining the operating parameters and mass distribution of the aircraft propeller, obtaining the variable pitch torque data table generated by the centrifugal force of the propeller blades through finite element analysis; judging whether the propeller operation is balanced according to the variable pitch torque data table, and obtaining the unbalanced data if it is unbalanced; obtaining the operating environment of the aircraft, determining the counterweight mass of the counterweight block; extracting the unbalanced point in the unbalanced data, and determining the counterweight position of the counterweight block; obtaining the propeller structure, and determining the counterweight shape of the counterweight block in combination with the aerodynamic efficiency; counterweighting the aircraft propeller according to the counterweight mass, counterweight position and counterweight shape, obtaining the propeller parameters after counterweighting, and obtaining the variable pitch load scheme according to the propeller parameter settings. The present application improves the response speed of reducing the variable pitch load of an aircraft propeller.

The invention belongs to the technical field of ammonia cracking hydrogen production, and particularly relates to an ammonia cracking hydrogen production reaction device which comprises a cracking furnace. A liner furnace and a heating unit are arranged in the cracking furnace; a transmission shaft is rotationally connected to the outer surface of the inner container furnace; one end of the transmission shaft is fixedly connected to the output end of the servo motor; the other end of the transmission shaft is fixedly connected with a driving wheel and an incomplete gear; the middle part of the cracking furnace is fixedly connected with a supporting column; a stirring shaft is rotationally connected to the middle part of the supporting column; one end of the stirring shaft is fixedly connected with a driven wheel; according to the step, a servo motor can drive a driving wheel to be meshed with a driven wheel, so that a stirring mechanism can rotate, and the servo motor can also drive an incomplete gear to be meshed with a driven gear, so that a rotating shaft can drive a second filter plate to rotate; due to the fact that intermittent movement exists when the incomplete gear is meshed with the driven gear, the effect of the bottom layer catalyst can be effectively improved.

The present invention relates to the technical field of robots, and more specifically, to a single-degree-of-freedom cylindrical climbing robot, comprising a trunk component, a magnetic adsorption component, an end drive component for changing the magnetic force of the magnetic adsorption component, and a swing component for changing the angle between multiple groups of magnetic adsorption units. The trunk component comprises a first motor and two groups of first connecting rods, one end of the two groups of first connecting rods are respectively connected to the two output ends of the first motor, and the other ends of the two groups of first connecting rods are hinged to the second connecting rod, and the second connecting rod is connected to a base; the magnetic adsorption unit comprises a radially magnetized magnetic core and a plurality of groups of permanent magnets surrounding the outer periphery of the magnetic core, and the plurality of permanent magnets are connected in sequence with different poles; the end drive component is installed on the base, the magnetic core is connected to the output shaft of the end drive component through a universal joint, and the swing component is connected between the magnetic adsorption component and the base. The present invention is adsorbed on the inner and outer surfaces of a steel structure plane or a cylindrical steel structure, can adapt to cylindrical climbing with different curvatures, and has rapid action and convenient control.

The present invention relates to the technical field of filters, and in particular to a tunable filter based on topological insulator materials, comprising a substrate, a topological insulator layer, a waveguide, and a resonant cavity, wherein the topological insulator layer is placed on the substrate, the waveguide and the resonant cavity are placed on the topological insulator layer, the waveguide is an optical fiber, the resonant cavity is a silicon dioxide material, the resonant cavity is placed on one side of the waveguide, the waveguide exposes the fiber core near the resonant cavity, and the waveguide and the resonant cavity are partially placed in the topological insulator layer. When applied, an external light beam is applied to irradiate the resonant cavity. The present invention applies an external light beam to irradiate the resonant cavity, changes the refractive index of the topological insulator layer outside the resonant cavity, and efficiently realizes the regulation of electromagnetic waves propagated in the waveguide by a beam of light, and has good application prospects in the application field of wavelength tunable filters.

The present invention discloses a ceramic head for a plasma surgical knife head, comprising a connecting piece, wherein a ceramic head is arranged at the upper end of the connecting piece, the top of the ceramic head is arranged to be tilted upward from the front to the rear, and an inclined surface is formed, a first inclined surface is arranged at the inclined surface of the top of the ceramic head and the rear end of the connecting piece, a second inclined surface is arranged at the inclined surface of the top of the ceramic head and the front end of the connecting piece, and a discharge hole is arranged at the center of the inclined surface of the top of the ceramic head. The present invention provides a ceramic head for a plasma surgical knife head, wherein the ceramic head adopts an irregular quadrilateral structure, and the upper and lower ends of the ceramic head are changed from arcs to straight lines, thereby shortening the distance between the two electrodes, so that the electrode energy can act on the affected area more quickly, and because the area of ​​the ceramic head becomes smaller, the energy of the electrode is more concentrated, and the effect is better.

The invention relates to the technical field of electro-optical modulators, in particular to a sinking type double-layer electrode lithium niobate electro-optical modulator which comprises a substrate, an oxide layer, an optical waveguide, a transition layer and a metal electrode. The substrate is located at the bottommost part, the oxide layer is located at the top of the substrate, the optical waveguide, the transition layer and the metal electrode are all arranged above the oxide layer, the optical waveguide is an X-shaped cut LN film and adopts a traditional ridge-shaped structure, and the metal electrode is of a double-layer electrode structure and comprises a first layer of traveling wave electrode and a second layer of T-shaped structure electrode. Loss can be effectively reduced, and modulation efficiency is improved. In order to reduce the light absorption loss, the metal electrode and the optical waveguide are separated by using a 0.2 mu m silicon dioxide transition layer, the metal electrode is arranged along the Z axis of the optical waveguide, and the sunken double-layer electrode lithium niobate electro-optical modulator realizes the half-wave voltage length product of 1.52 V.cm under the light absorption loss of 0.14 dB / cm, and has important guiding significance for the design of the electro-optical modulator.

The utility model discloses a rotary windmill capable of observing the wind direction, and relates to the technical field of toys, the rotary windmill is characterized in that a first connecting rod is sleeved in a hollow handle, a wind indicator comprises a wind direction rod and an arrow and an empennage which are respectively connected to two ends of the wind direction rod, the first connecting rod is fixedly connected with the wind direction rod, the wind direction rod is horizontally arranged, and a second connecting rod is fixedly connected with the wind direction rod; the first windmill and the second windmill are rotationally connected with the second connecting rod through rotating assemblies, and the front faces of the first windmill and the second windmill face the same direction as the arrow. Under the action of wind power, the wind indicator rotates to drive the second connecting rod to rotate, so that the windmill is further driven to rotate in the horizontal direction, and the windmill can autonomously adjust the front face of the windmill to the windward state according to the wind direction; by arranging the first windmill and the second windmill with the blades opposite in twisting direction, children can conveniently know the influence of the twisting direction of the blades on the rotation direction of the windmill, and therefore the effect of the windmill toy in science and education is improved.

The invention belongs to the technical field of injection production processes, and particularly relates to a famotidine injection and a preparation method thereof. According to the famotidine injection disclosed by the invention, dendrobium nobile is fermented by using lactic acid bacteria ATCC 8008 and saccharomycetes ATCC 918, and chlorogenic acid and ilaprazole are added to prepare the famotidine injection. According to the method for fermenting by using the lactic acid bacteria ATCC 8008 and the saccharomycetes ATCC 918, not only can the curative effect of famotidine be improved, but also the effect of the dendrobium is enhanced due to the modification of the dendrobium, and more beneficial substances in the dendrobium are obtained. The Chinese yam and the lotus seeds used in the famotidine have good body building effects, have the advantages of tonifying the spleen and nourishing the stomach and can also enter the heart and the spleen, and the medicine effect of the prepared famotidine is enhanced. The famotidine prepared by the invention can be used for treating peptic ulcer, and has a great development prospect in the field of first aid.

The utility model discloses a household fermentation tank and relates to the technical field of fermentation tanks. Comprising a tank body, an annular plate is arranged on the outer wall face of the tank body, two pairs of supporting legs are arranged on the lower wall face of the annular plate, a first motor is arranged on the lower wall face of the tank body, a rotating shaft is arranged at the driving end of the first motor, the rotating shaft is rotationally connected into the bottom face of the tank body, and a cylinder is arranged in the upper wall face of the tank body; a second motor is arranged in the cylinder, the driving end of the second motor is rotationally connected into the cylinder, a threaded rod is arranged at the driving end of the second motor, a pair of sliding grooves are formed in the inner wall face of the cylinder, and a sleeve rod is movably connected into the cylinder. The uniform stirring structure is designed, the device can uniformly stir fermented food through repeated up-down movement and rotation, part of food is prevented from sinking to the bottom, the food in the pipe can make full contact with air above, the effect of oxidase is improved, practicability is high, and the labor burden is relieved.

The application discloses a hyperspectral image adversarial sample generation method and a hyperspectral target detection model test method, wherein the adversarial sample generation method comprises the following steps: acquiring an original hyperspectral image, and selecting a proxy model; processing the original hyperspectral image by using the proxy model to obtain a prediction result; based on the proxy model, a mixed image is made in combination with spectral features and spatial features of a target category; the original hyperspectral image and the mixed image are respectively input into the proxy model to correspondingly obtain two shallow layer features; a multi-path mixed loss function is constructed based on the two shallow layer features and the prediction result, and the proxy model is iteratively trained by using the multi-path mixed loss function for back propagation to obtain an adversarial sample. The adversarial sample generated by the method comprises rich spectral information, and the effective test of the hyperspectral target detection model can be realized.

The invention belongs to the technical field of cell molecular biology, and particularly relates to a colorectal cancer molecular marker and a detection method and application thereof. The invention provides a colorectal cancer molecular marker circETFA (2, 3, 4), the nucleotide sequence of the colorectal cancer molecular marker circETFA (2, 3, 4) is as shown in SEQ ID NO: 1, the colorectal cancer molecular marker circETFA (2, 3, 4) can be used for detection and prognosis of colorectal cancer, primers for detecting the expression quantity of circETFA (2, 3, 4) are as shown in SEQ ID NO: 2 and 3, and the colorectal cancer molecular marker circETFA (2, 3, 4) is strong in specificity, high in sensitivity and stable in result. The invention further provides a shRNA sequence of circETFA (2, 3, 4), the positive and negative strand sequences of the shRNA sequence are shown as SEQ ID NO: 4 and 5, and the shRNA sequence can be used for knocking down expression of circETFA (2, 3, 4) in colorectal cancer cells, can inhibit malignant proliferation of the colorectal cancer cells and is used for preparing colorectal cancer drugs.

The application provides a method for transdifferentiation of fibroblasts into hair papilla-like cells and application thereof, and relates to the technical field of biotechnology. The transdifferentiation method comprises inducing fibroblasts by using Peficitinib, so that the fibroblasts are transdifferentiated into hair papilla-like cells. A large number of hair papilla-like cells with hair induction capacity can be obtained in vitro by the method, and the problem that primary separated hair papilla cells are insufficient for developing alternative therapies for treating alopecia in the prior art is solved.

The invention discloses an aluminum alloy frame polishing device with an overturning structure and a using method, and relates to the technical field of aluminum alloy frame production, the aluminum alloy frame polishing device comprises a polishing base, a polishing inner seat and a driving push plate, a guide vertical frame is mounted at the output end of an electric lifting seat, and an aperture butt joint column is movably mounted on the opposite side of the driving push plate through a rotating shaft; the overturning motor is installed in the center of the outer side of the driving push plate, and the inner diameter arc abutting frame is movably installed on the outer side of the aperture butt joint column. A vehicle frame initial limiting assembly is arranged on the inner side of a guide vertical frame, two sets of aperture butt joint columns are inserted into a circular ring hole of a center main rod, and an outer abutting hand rod drives an inner diameter arc abutting frame to expand outwards to abut against the inner diameter of the circular ring hole of the center main rod; the expanding diameter of the inner-diameter arc abutting frame is adjusted according to the diameter of the circular ring hole of the aluminum alloy frame so as to ensure that the inner-diameter arc abutting frame can be accurately fixed in the circular ring hole, the aluminum alloy frame is prevented from sliding or deviating in the overturning process of the aluminum alloy frame, and therefore the stability of the polishing process is improved.

The utility model discloses a sound box with a high sound effect, which comprises a box body, and a low pitch unit, a middle pitch unit and a high pitch unit which are arranged on the sound box, and a front plate, a back plate, a top plate, a bottom plate, a first side plate and a second side plate of the box body are all composite plate bodies. The composite board body comprises an inner-layer high-density fiberboard, an outer-layer medium-density fiberboard and a high-damping adhesive layer which is fixedly adhered between the inner-layer high-density fiberboard and the outer-layer medium-density fiberboard, and the centers of the low-pitch unit, the middle-pitch unit and the high-pitch unit are not positioned on the same straight line. The box body of the sound box is composed of the inner-layer high-density fiberboard, the outer-layer medium-density fiberboard and the high-damping glue layer, and the box body is formed by combining different woods to disperse panel resonance, so that obvious acoustic resonance of a single frequency is avoided. And the inner-layer high-density fiberboard and the outer-layer medium-density fiberboard are bonded by using high-damping glue to form an inseparable whole, so that unnecessary resonance is avoided.

The invention relates to the technical field of skin care products, and aims to provide freckle-removing and whitening essence and a preparation method thereof, and the freckle-removing and whitening essence comprises 0.5-3.5% of a whitening and freckle-removing agent, 5-10% of a humectant, 2-5% of a skin conditioner, 0.2-0.6% of a preservative, 0.1-0.3% of a thickener, 0.1-0.2% of a pH regulator, 0.02-0.05% of a chelating agent and the balance of water. The traditional Chinese medicine composition has a good tyrosinase activity inhibition effect, and can whiten and tender the skin and moisturize and nourish the skin after being used.