34results about How to "Reduce divergence" patented technology

The invention relates to multifunctional self-adaptive laser metal 3D printing equipment and a control method thereof.The device comprises a spray head bottom plate and a laser cladding spray head, the laser cladding spray head comprises a spray nozzle used for outputting powder and a pipeline connected to the spray nozzle and used for conveying the powder, and a first converging assembly is installed on the spray head bottom plate; the end, away from the nozzle, of the pipeline is arranged on the inner side of the first gathering assembly, the powder is magnetized when passing through the first gathering assembly in the pipeline, and a gathering processing assembly used for repelling the magnetic powder is arranged on the outer side of the nozzle. Through the design of the first gathering assembly and the gathering processing assembly, powder is magnetized through the first gathering assembly during conveying, then the magnetized powder and the gathering processing assembly generate like-pole repulsion acting force when the powder is sprayed out of the nozzle, the powder is promoted to be gathered together to form a powder beam, powder divergence and irregular arrangement are reduced, and the powder quality is improved. And the position precision and the forming quality and precision of powder conveyed to the molten pool are improved.

The present invention discloses a street lamp fixture based on energy-saving control of LED street lamps, and relates to the technical field of street lamp fixtures, including a street lamp base, a lamp pole frame fixedly connected to the top of the street lamp base, a connection cover fixedly connected to both ends of the lamp pole frame, and a street lamp body fixedly connected to the bottom end of the connection cover, a pair of connection covers fixedly connected to the inside of each of the two connection covers, a reflective mechanism fixedly connected to the top of the lamp pole frame, and a pair of photovoltaic modules fixedly connected to the top of the top plate, a cleaning mechanism is provided between the top of the top plate and the top of the pair of photovoltaic modules, and a fog concentration detection sensor is provided on one side of the lamp pole frame. The present invention can form a V-shape by pushing the reflective film through the deformation of the deformation memory telescopic rod, and use the two inclined surfaces of the V-shaped reflective film to reflect the divergent light multiple times, so as to make the divergent light go downward again and gather with the lighting light, thereby enhancing the light intensity and reducing the dispersion of light.

The invention provides a multi-agent strategy network training method and device, a strategy generation method and device, equipment and a medium. The multi-agent strategy network training method comprises the steps that local observation states and global observation states of all agents and rewards for executing action strategies in the execution process of the action strategies generated based on a currently updated strategy network are collected; determining a target obstacle function value corresponding to each safety evaluation network based on the local observation state and a pre-constructed random discrete diagram control barrier function; determining the security constraint condition of each agent based on the approximate value of the obstacle function output by each security evaluation network; determining an advantage value of each agent action based on a state value prediction value output by the task value evaluation network and the collected rewards; and under the constraint of a security constraint condition, guiding the strategy network to perform parameter updating by taking the advantage value as an updating direction signal. According to the method, the training oscillation or divergence phenomenon caused by safety signal distortion is reduced, and a smoother and more stable convergence process is realized.

The invention relates to a point laser module and intelligent mobile equipment. The point laser module comprises a point light source, a lens cone and a shaping lens group, the point light source and the shaping lens group are located in the lens cone and are arranged at intervals in the extending direction of the lens cone, the shaping lens group comprises a first lens and a second lens, and the first lens and the second lens are arranged at intervals in the extending direction of the lens cone. The curvature radiuses of the first lens and the second lens are designed to be capable of increasing the point brightness of the light spots shaped by the shaping lens group, laser generated by the point light source forms a virtual light source after passing through the first lens, and light emitted by the virtual light source is collimated after passing through the second lens. Through the shaping lens group, the spot brightness of the formed light spot can be increased, a long focal length and a short back focal length can be achieved, the long focal length is maintained, the light spot brightness is improved under the condition that the light spot area is not changed, the short back focal length is achieved, the light utilization rate is improved, and therefore the spot brightness of the light spot and the light utilization efficiency are both improved.

The embodiment of the invention provides an online reinforcement learning method and system, a storage medium and a degree product, and the method comprises the steps: controlling a robot to execute a target operation task through a strategy model, so as to obtain corresponding first training data; receiving first interaction information from a human expert to construct corresponding second training data; performing time difference loss calculation based on the first training data and the second training data to train a value evaluation model, and obtaining value evaluation information output by the value evaluation model; performing advantage calculation based on the second training data and the corresponding value evaluation information to obtain advantage information; performing fusion loss calculation based on the advantage information to train a strategy model; the fusion loss comprises advantage weighting strategy loss and near-end strategy optimization loss. According to the embodiment of the invention, the success rate of the robot on the target operation task can be improved under the conditions of lower human teaching cost and fewer environment interaction samples.

The invention discloses a three-port reflection-type circulator and a preparation method thereof, the three-port reflection-type circulator comprises a three-fiber tail fiber, an annular core and a plurality of glass tubes, the tail fiber end face of the three-fiber tail fiber is subjected to thermal core expansion treatment, the annular core comprises a polarization beam splitting assembly, an optical rotation assembly and a refraction assembly, the polarization beam splitting assembly comprises a displacement crystal, and the displacement crystal is connected with the optical rotation assembly. The optical rotation assembly comprises a half-wave plate group, an optical rotation unit, a half-wave plate and a compensation plate, the refraction assembly comprises a collimating lens, a Wollaston prism and a reflective mirror, and the three-fiber tail fiber and the annular core are sleeved through a plurality of glass tubes; wherein light emitted by the three-fiber tail fiber sequentially passes through the polarization beam splitting assembly, the optical rotation assembly and the refraction assembly, is reflected by the reflective mirror, sequentially passes through the refraction assembly, the optical rotation assembly and the polarization beam splitting assembly and returns to the three-fiber tail fiber. The three-port reflective circulator in the embodiment of the invention is more compact in structure and smaller in size, and can be widely applied to the technical field of optical devices.

The application provides a fiber-optic Fabry-Perot sensor based on light beam convergence and a manufacturing method thereof, and relates to the technical field of semiconductors. The sensor comprises a diaphragm layer, an intermediate layer and a bottom layer which are arranged in layers; the diaphragm layer is provided with a first groove, the intermediate layer is attached to the diaphragm layer in a manner that a first layer surface thereof faces the first groove, so as to form a Fabry-Perot cavity based on the first groove; the bottom layer is provided with a second groove, the intermediate layer is attached to the bottom layer in a manner that a second layer surface thereof faces the second groove, so as to form a nano-containing cavity based on the second groove; the second layer surface of the intermediate layer is formed with a micro-nano anti-reflection structure comprising array-distributed anti-reflection units located in the nano-containing cavity; and the bottom layer is formed with a micro-nano collimation structure comprising array-distributed collimation units located in the nano-containing cavity and in a symmetrical positional relationship with the micro-nano anti-reflection structure. The application at least reduces the manufacturing complexity.

The invention discloses a micro-needle tip annular array cathode electron gun and a preparation method of a cathode thereof, and belongs to the technical field of vacuum electronic devices, the electron gun comprises a cathode, a grid electrode, a double focusing electrode and an anode; specifically, the cathode is of an annular array structure and is divided into two parts by a cone along a symmetry axis, the tangent plane is a bottom surface, the tip end faces inwards, and the cathode is uniformly distributed in a cathode groove, is in a concave surface shape and has a pre-focusing effect; the micro needle tip design of the cathode significantly increases the field enhancement factor, thereby improving the electric field intensity of the tip, improving the emission current density, and reducing the turn-on voltage. The grid is a rhombic grid hole grid mesh, the side length of the rhombus is consistent with the radius of a cathode groove, electric field distribution is optimized by adjusting the acute angle of the rhombus, and the field emission efficiency is remarkably improved; the first focusing electrode is a hyperbolic focusing electrode, the inner wall of the first focusing electrode is in a hyperbolic curve shape, and the focusing effect is enhanced by guiding an electric field line to bend towards the anode along the central axis; the electron gun has high field emission performance and high beam compression ratio.

The invention discloses an integrated photovoltaic curtain wall system, and relates to the technical field of photovoltaic curtain walls. The system comprises a supporting frame, the supporting frame comprises a plurality of stand columns installed on a building main body structure and a plurality of supporting arms fixed to the stand columns, the stand columns are arranged at equal intervals, the supporting arms are perpendicular to the stand columns, and the supporting arms are arranged along the stand columns at equal intervals; the photovoltaic assembly comprises a first keel, a second keel connected to the lower end of the first keel and a photovoltaic panel installed on the first keel, and the outer end of the first keel and the outer end of the second keel are connected to the vertically adjacent supporting arms respectively. The lower portion of the first keel and the upper portion of the second keel incline in the direction away from the building main body structure. The heat dissipation effect of the photovoltaic panel is improved in a high-temperature environment in summer, the photoelectric conversion efficiency of the photovoltaic panel is improved, and meanwhile, the influence of high-temperature air gathered at the rear part of the photovoltaic panel on the room temperature of the internal space of a building can be reduced.

A light-emitting diode is used for solving the problems that in the prior art, after a diode in the prior art is powered on, light condensation is conducted through a lens on the diode, but when light is emitted at a light source emitting position, light rays passing through the lens are few and are prone to being diffused all around, and the lens condensation effect is poor; the light emitting diode comprises a diode body, the diode body comprises a base, a shell, a first pin and a second pin, the shell is located at the top of the base, the first pin and the second pin are fixedly arranged at the bottom of the base and extend into the shell, and the first pin and the second pin are arranged on the base and extend into the shell. The second pin is provided with a light condensation bowl used for light condensation, the light condensation bowl is located in the shell, a light source assembly used for light emitting is arranged in the light condensation bowl, a first light condensation assembly used for light condensation is arranged at the position, away from the base, of the shell, and the outer surface of the shell is provided with two protruding edges used for preventing the diode body from deviating.

This invention discloses a rinsing device for non-ferrous metal materials, comprising a circulation tank, an air compressor pump, a delivery pipe, a water pump, a connecting pipe, a water tank, a rinsing pipe, an air supply pipe, an air inlet box, an air inlet pipe, a support rod, a tension steel wire, a check ball, a threaded cylinder, and an installation assembly. The delivery pipe is embedded in the side of the circulation tank, one end of which is connected to the water pump. One end of the water pump is embedded in the connecting pipe, and the other end of the connecting pipe is connected to the water tank. Several internally impacting rinsing pipes are connected between the water tank and the circulation tank. In this invention, water flows at high speed inside the rinsing pipes. The workpiece is fixed inside the rinsing pipes by the installation assembly. After the water flow accelerates inside the rinsing pipes, it impacts the surface of the workpiece. The rinsing pipes can isolate the water flow from atmospheric pressure, increasing the water flow velocity. Simultaneously, the rinsing pipes can reduce water flow dispersion, ensuring the water flow completely impacts the workpiece, thus greatly improving the rinsing effect.

The utility model relates to the technical field of dish-shaped cavity MPCVD devices, in particular to a dish-shaped cavity MPCVD device temperature adjusting structure which is characterized in that a bottom column is fixedly arranged below a working table, a first supporting column is fixedly arranged at the center of the upper portion of the working table, and a reaction device is fixedly arranged at the upper end of the first supporting column; a temperature adjusting part is arranged on the side wall of the reaction device, heat preservation gas in a left gas storage tank is input into a gas protection cavity through a gas conveying pipe, the reaction device is better subjected to heat preservation, heat dissipation in the reaction device can be reduced, gas in the gas protection cavity is extracted and stored into a right gas storage tank through a gas pipe, and the reaction device is more stable. The temperature regulator is used for regulating the temperature of the liquid in the cooling pipeline to a proper temperature, and the cooling pipeline and the cooling fins are used for cooling the reaction device more quickly.

The utility model discloses a dust-free ton bag feeder which comprises a feeder body, an installation cylinder is fixedly connected to the upper side of the feeder body, a baffle is fixedly connected to the interior of the installation cylinder, a supporting plate is fixedly connected to the inner side of the feeder body, a driving motor is fixedly connected to the exterior of the feeder body, and an installation groove is formed in the upper side of the installation cylinder. Soft screen cloth is fixedly connected and stored in the mounting groove, a fixing ring is fixedly connected to the top of the soft screen cloth, a vertical plate is fixedly connected to the upper side of the feeder body, and a lifting assembly is arranged in the vertical plate. According to the device, most dust generated during ton bag feeding is effectively blocked through the blocking plate in the mounting cylinder and the groove body matched with the ton bag, for a small amount of escaped dust, an operator can pull the soft screen cloth by pulling the pull rope and utilizing the connecting piece to form a temporary dust cover, dust diffusion is comprehensively controlled, the feeding efficiency is guaranteed, and the dust removal efficiency is improved. And the cleanliness of the production environment and the health guarantee of operators are also remarkably improved.

The utility model discloses a solenoid for electromagnetic valve, including support body and the skeleton of setting in support body inside, the support body includes U type frame and sets up the apron of U type frame open end, still include the electricity incoming subassembly of clamping in one side of U type frame, the electricity incoming subassembly includes circuit board and mounting bracket. The utility model adopts modularization design, and the circuit board and mounting bracket are integrated into electricity incoming subassembly, make from production to operation and maintenance whole process realized optimization: first, the assembly link is simplified operating procedure because of part integration, reduces the cumbersome process of scattered assembly, thereby greatly improves the assembly efficiency, second, when the later maintenance replacement, modularization design makes no need to the coil overall to be disassembled, only needs to carry out single operation to the electricity incoming subassembly, not only simplifies the maintenance process, reduces the maintenance threshold, can also complete the replacement fast, effectively reduces the downtime of equipment because of the failure.

The present invention discloses a device and method for realizing rapid separation of large-scale oil-water mixtures. The separation device includes one or more cyclone core tubes, which are cyclone sections, tapered sections and flow-stabilizing tubes from bottom to top. The cyclone section is a cylinder with upper and lower openings, and the lower end opening of the cyclone section is an axial inlet, and a spiral blade is provided on the upper part of the axial inlet; the tapered section includes an inner cone section with a certain taper and upper and lower openings, and a sleeve outside the inner cone section, and a plurality of water phase outlets are evenly distributed on the sleeve in an annular direction, and two rows of water holes are axially symmetrically provided on the inner cone section; the flow-stabilizing tube is a cylinder with upper and lower openings, and the lower end of the flow-stabilizing tube penetrates into the inner cone section from the upper opening of the inner cone section and is fixed to the upper part of the cyclone section, and the upper opening of the flow-stabilizing tube is an oil phase outlet. The separation device of the present invention introduces a flow-stabilizing tube to collect large oil droplets near the axial direction of the cyclone section, and has a compact structure, high separation efficiency and stable separation effect.

The application relates to the technical field of real-time target detection and discloses a weakly supervised RT-DETR target detection method based on improved pseudo labels. The method generates pseudo labels by weakly supervising label data sets and enhances the pseudo labels, and an improved model comprising a lightweight backbone network, a pseudo label guided cross-scale interaction module and a decoder with a pseudo label position constraint mechanism is constructed. The model is trained end to end by adopting an iterative pseudo label updating strategy. The pseudo label guided cross-scale interaction module dynamically modulates the feature fusion process by using pseudo label information, thereby enhancing the feature discrimination ability of the model for multi-scale targets. The decoder with the pseudo label position constraint mechanism introduces the geometric prior of the pseudo label as a soft constraint into query optimization, thereby improving the positioning accuracy and training stability of the model under weak supervision and reducing the dependence on accurate labeled data.

The invention discloses equipment for improving or removing a traditional painting and calligraphy ink seal, which comprises a laser equipment main body, one side of the laser equipment main body is provided with a corrugated pipe, one end of the corrugated pipe is provided with a laser head, one end of the laser head is provided with an emission head, the laser equipment main body comprises a box body, the top of the box body is fixedly connected with a handle, and the top of the box body is fixedly connected with the handle. A control panel is fixedly installed on one side of the box body, and a controller electrically connected with the control panel is fixedly installed on the inner wall of the box body. The device has the advantage of high efficiency, and solves the problems that in the using process of existing equipment for improving or removing painting and calligraphy ink seals, continuous and efficient operation is not convenient, frequent interruption and resetting possibly cause inconsistent treatment effects each time, the final repairing quality is affected, and the repairing efficiency is affected. And operators need to spend more time and energy to adjust the equipment and process each work, so that the labor cost is increased.

The utility model discloses an integrated light-emitting diode (LED) light source, which relates to the field of LED light sources, and comprises an LED light source main body, the LED light source main body consists of a lamp bead mounting substrate and LED lamp beads, one end of the lamp bead mounting substrate is fixedly provided with a light condensing component, and the LED lamp beads are positioned in the light condensing component. The light condensation assembly is composed of an annular installation plate, a heat conduction silicone grease layer, an aluminum conical barrel and a conical reflection lens, the heat conduction silicone grease layer is fixedly installed at one end of the annular installation plate, the aluminum conical barrel is fixedly installed at the other end of the annular installation plate, the light condensation assembly is arranged on the lamp bead installation base plate, and meanwhile the LED lamp beads are located in the light condensation assembly; the light condensation assembly can focus light emitted by the LED lamp beads, light divergence and loss are reduced, the light is focused in a specific area, energy waste is reduced, and meanwhile the heat dissipation efficiency of the LED light source body can be improved through the annular mounting plate, the heat conduction silicone grease layer and the aluminum conical barrel on the light condensation assembly.

The utility model discloses a filter device before waste gas detection, and belongs to the technical field of waste gas filtration. A filter device before waste gas detection comprises a sealing cavity, a connecting port is formed in one end of the sealing cavity, a waste gas outlet is formed in the other end of the sealing cavity, fine filter cloth is arranged in the sealing cavity, coarse filter cloth is arranged in the fine filter cloth, a buffer plate is arranged at one end of the coarse filter cloth, and a filter screen is arranged at the other end of the buffer plate. A first connecting plate is arranged at the other end of the coarse filter cloth, a reinforcing rib is arranged on one side of the first connecting plate, and a waste gas inlet is formed in the other side of the first connecting plate. In order to solve the problems that a waste gas filter is insufficient in filtering capacity and cannot reduce the content of aerosol in waste gas, fine filtering cloth is arranged in a sealing cavity, coarse filtering cloth is arranged in the fine filtering cloth, when waste gas passes through the fine filtering cloth, the waste gas firstly passes through the coarse filtering cloth, then passes through the fine filtering cloth, and the purified waste gas basically meets the subsequent detection requirement.

The embodiment of the utility model provides an indicating lamp light guide structure and a reading lamp, and relates to the field of lighting lamps. The indicating lamp light guide structure comprises an indicating lamp panel, an inner cover plate and an outer cover plate, lamp beads are arranged on the indicating lamp panel, a light condensation part is formed on the inner cover plate, the light condensation part abuts against the indicating lamp panel and surrounds the lamp beads, a light hole is formed in the outer cover plate, and the light hole is communicated with an inner cavity of the light condensation part. According to the light guide structure of the indicating lamp, the light beams can be generated through the lamp beads, the light condensation part abuts against the indicating lamp panel and surrounds the lamp beads, gaps between the light condensation part and the indicating lamp panel are avoided, the light beams diverging towards the periphery are reduced, the light beams can move towards the light holes from the inner side of the light condensation part and are output, and then the light beams are converged; excessive divergence is prevented, and the indication effect is prevented from being affected.

The invention relates to the technical field of laser measuring instruments, in particular to a stable laser displacement measuring instrument. The defect that the numerical value of a laser displacement measuring instrument is affected during wind and rain weather monitoring is overcome. Comprising a mounting plate, the mounting plate is fixedly connected with a mounting frame through a mounting column, the mounting frame is provided with a laser transmitter, the mounting frame is fixedly connected with a first fixing frame, the first fixing frame is fixedly connected with a first baffle, the laser transmitter is fixedly connected with a second fixing frame, and the second fixing frame is fixedly connected with a second baffle. The first fixing frame and the second fixing frame slide together and are rotationally connected with a second baffle. In windy and rainy days, the weight of rainwater is utilized to drive the second baffle to stretch out, the second baffle is matched with the first baffle to strengthen shielding of the rainwater, meanwhile, wind power is utilized to drive the second shielding plate to rotate, the second shielding plate faces the windward side to shield wind, and therefore it is guaranteed that the numerical value monitored by the laser transmitter is in an accurate state.

The application provides a light-emitting chip and a laser light source. The light-emitting chip comprises a substrate, an N electrode, an N-type Bragg mirror set, an active layer, a current blocking layer, a P-type Bragg mirror set and a P electrode. The current blocking layer is formed on the active layer, and a current injection aperture is formed in a central region of the current blocking layer. The P-type Bragg mirror set is formed on the current blocking layer, and the projection of the P-type Bragg mirror set on the active layer is larger than the current injection aperture along the injection direction of the current. The P electrode is formed on the P-type Bragg mirror set. A PN junction depletion region is formed at the junction of the current blocking layer and the P-type Bragg mirror set. The PN junction depletion region is used to prevent the current from flowing into the current blocking layer, so that the current is injected into the active layer through the current injection aperture, thereby improving the injection efficiency of the current in the active layer, and more electrons and holes can be combined in the active layer, thereby improving the electro-optical conversion rate and the light-emitting quality of the light-emitting chip.

The invention discloses an improved PDR indoor positioning method based on LSTM and map matched filtering, and belongs to the technical field of indoor positioning. Comprising the following steps: firstly, acquiring three-axis acceleration and three-axis angular velocity data when a pedestrian walks through an SINS (Strapdown Inertial Navigation System), and acquiring step length estimation of the pedestrian according to a fixed step length model; the course angle of the pedestrian is obtained by using the LSTM model and combining the three-axis acceleration and the three-axis angular velocity data, so that course angle divergence caused by error accumulation in a traditional course angle estimation method is inhibited, and the estimation precision of the course angle is improved; then, calculating an initial positioning coordinate of the pedestrian according to a PDR algorithm in combination with the step length estimation value of the pedestrian; and finally, based on the map information, performing map matching based on particle filtering on the initial positioning coordinates, and correcting the initial positioning coordinates, thereby effectively reducing the situation that the positioning coordinates appear in an impassable area, and further improving the positioning precision.

The utility model provides a sensing structure which comprises a tube seat, the top of the tube seat is connected with a tube cap in a clamping mode, the top of the tube cap is connected with a light gathering assembly in a clamping mode, the inner wall of the tube cap is fixedly connected with a clamping assembly, the top of the tube seat is provided with a shell, and the inner wall of the shell is provided with a circuit element. The top of the circuit element is provided with an FET tube, the interior of the housing is provided with a supporting ring, the top of the supporting ring is provided with a PZT thermoelectric element, the top of the PZT thermoelectric element is provided with an optical filter, the bottom of the housing is provided with pins, and the top of the housing is provided with a light hole. Compared with the prior art, the infrared detector has the following beneficial effects that the light condensing assembly arranged at the top is used for carrying out centralized processing on external incident light rays, and the light condensing mirror is used for reducing light ray divergence, so that the light condensing effect is more obvious, the sensing receiving effect is improved, and the imaging effect of the infrared detector is improved.

According to the urinal and the toilet, a urinal is arranged on the front face of the urinal, a first exhaust port is formed in the top of the urinal and communicates with the urinal and an air extractor, a drain outlet is formed in the bottom of the urinal to discharge sewage in the urinal, and an air suction opening is formed in the back face of the urinal. A suction opening is formed in the urinal, the suction opening is communicated with the first exhaust port and / or the drain outlet, an air extractor is arranged at the suction opening, the air extractor extracts odor in the urinal through the suction opening and the first exhaust port and / or the drain outlet, and compared with a mode only adopting an exhaust fan, the active air extraction mode can effectively reduce the situation that the odor is diffused into a toilet.

The utility model discloses a splice type base plate for a refrigerator car, which relates to the technical field of refrigerator cars and comprises a refrigerator carriage and a fixing component, one end of the refrigerator carriage is fixedly connected with a refrigeration component, the other end of the refrigerator carriage is hinged with a carriage door, and the inner bottom wall of the refrigerator carriage is fixedly connected with a base plate. The bottom plate is formed by splicing and combining a plurality of splicing plates left and right, supporting protrusions are arranged on the splicing plates, under the action of first connecting strips, second connecting strips, clamping heads and clamping grooves, the multiple splicing plates are clamped in the left-right direction and the front-back direction, the mounting efficiency is greatly improved, the bottoms of goods are supported through the supporting protrusions, and the goods are more convenient to mount. A ventilation groove is formed between every two adjacent supporting protrusions, so that cold air or water can flow at the bottom of goods and in the refrigerator van, the goods are blocked through the arranged sliding frame and the blocking rod assembly, the goods are fixed, and the stability in the transportation process is improved.

The invention discloses an air blowing mechanism in a sharpening machine, a chip collecting device of the sharpening machine and the sharpening machine. The air blowing mechanism in the sharpening machine comprises a motor, a transmission mechanism connected with the motor and a sharpening cutter arranged in the transmission mechanism. The transmission mechanism comprises a transmission shell, a driving wheel and a driven wheel which are rotationally connected are arranged in the transmission shell, a cutter mounting hole penetrates through the center of the driven wheel, a grinding cutter is fixed in the cutter mounting hole, the top surface of the grinding cutter is higher than the cutter mounting hole, and grinding cutter pits are concavely formed in the upper side and the lower side of the grinding cutter; a blowing hole is formed in the side wall of the transmission shell and extends to the position above the driven wheel. At least one air guide groove is formed in the inner wall of the cutter mounting hole, at least one air inlet hole is formed in the side wall of the sharpening cutter, the air guide groove corresponds to the air inlet hole, and the air inlet hole is communicated with the sharpening cutter nest. Airflow enters the interior of the sharpening tool nest through the transmission shell and blows from inside to outside, and the situation that the tool nest is blocked by chips is avoided to the maximum extent.

The application relates to the technical field of lamp lighting and heating, in particular to a heat-preservation lamp, which comprises a heat-preservation cover in a groove structure with one side open; a reflecting cover is fixed in the groove structure and connected with the heat-preservation cover through a first connecting piece; the back of the reflecting cover is kept apart from the inner wall of the heat-preservation cover, and the reflecting surface of the reflecting cover faces the open side; a light-emitting body is connected with the reflecting cover through at least one end to be suspended in the reflecting cover; the heat-emitting light of the light-emitting body is reflected by the reflecting cover and uniformly emitted to the open side, so that the problem that heat of the heat-preservation lamp in the prior art is seriously lost and cannot be effectively utilized, and the heat-preservation lamp has a large power consumption to maintain high temperature is solved.

The application discloses a non-divergence interpolation method for fluid motion control equation in sea surface oil spill simulation, which comprises the following steps: solving initial velocity field; performing non-divergence interpolation; updating particle position; if the running time of simulation meets the requirement, ending, otherwise turning to step A to continue simulation. The application can realize oil spill dynamic simulation based on fluid mechanics NS equation, which is a physical-based method, thus effectively improving the real feeling of oil spill behavior. Since the application combines the continuity equation of fluid mechanics, the divergence of velocity field is gradually reduced through multi-step iteration solving method; therefore, the application can guarantee that the interpolation result meets the continuity equation, so that the calculation result is more stable. Since the application meets the continuity equation, the number of iterations required for calculation is less.

The invention provides a heart failure treatment device based on an ultrasonic super lens, which comprises a transmitting module and a phase modulation module, the transmitting module comprises a transducer, the phase modulation module comprises the ultrasonic super lens, the transducer and the ultrasonic super lens are tightly attached, the central points of the transducer and the ultrasonic super lens are aligned, and the transducer can transmit a plane wave signal to be modulated. The ultrasonic super lens modulates a plane wave sound field to form a non-diffractive symmetrical Airy sound beam, and generates a focused ultrasonic field at a sub-wavelength focus. Ultrasonic waves are accurately focused on the left ventricle, so that accidental injuries to surrounding sensitive tissues are reduced to the maximum extent, the off-target effect is reduced, and accurate treatment can be achieved without other invasive or complex means. The traditional Chinese medicine composition can effectively reduce myocardial fibrosis and improve cardiac functions, and does not need invasive surgery. In addition, the risk of arrhythmia can be reduced, and long-term and safe heart treatment is achieved.