64results about How to "Stability is not affected" patented technology

According to the tension training assembly suitable for the strength training instrument and the strength training instrument, the flexible guide rail is adopted as the flexible movement guide rail of the movable pulley block, and the two ends of the movable pulley block are connected with the suspension wire and the resistance source pull rope correspondingly; a trainee pulls the movable pulley block to slide along a sliding stroke area limited by the flexible guide rail through the suspension wire so as to overcome the resistance of the resistance source pull rope and play a role in strength training. The mode that the movable pulley block is matched with the flexible guide rail perfectly solves the inherent difficulties that a traditional movable pulley metal guide rail is high in price, and left and right guide rails are blocked and unsmooth in the reciprocating motion process, and due to the adoption of the technology that the flexible guide rail is matched with the movable pulley block, the double-end rope outlet function of low-cost single-motor resistance source equipment can be achieved. And compared with the scheme in the market, the equipment cost is greatly reduced, and the use comfort performance is improved. The tension training assembly can be assembled on various rope output strength training instruments, and low-cost electronic strength training equipment is provided.

The utility model relates to the technical field of fixing and supporting, and discloses a fixing and supporting device for house assembly type construction, which comprises a base I and a base II, a guide rod is fixedly connected onto the base I, a limiting block is fixedly connected onto the guide rod, a threaded rod is rotatably connected between the limiting block and the base I, and a threaded rod is fixedly connected onto the threaded rod. A threaded block is in threaded connection with the threaded rod, a connecting long strip is hinged to the threaded block, a supporting rod is hinged to the connecting long strip, the supporting rod is hinged to the limiting block, and the threaded block is slidably connected to the guide rod. According to the fixing and supporting device for house assembly type construction, when the fixing and supporting device for house assembly type construction is used, the motor is started and drives the threaded rod to rotate, so that the threaded hole in the threaded rod ascends, the supporting rod is unfolded to be used for supporting an assembly type component, the stress area is greatly increased, and the component is uniform in stress, not prone to deformation and firm in connection; the overall safety and stability are not affected, operation is easy, and time and labor are saved.

The invention discloses a rotatable closed type sputum suction tube. The closed sputum suction tube comprises a sputum suction tube assembly and a three-way connector connected with the sputum suction tube assembly, the sputum suction tube assembly comprises a sputum suction tube and a thin film protective sleeve arranged outside the sputum suction tube in a sleeving mode, and the three-way connector is provided with a trachea cannula connector, a breathing machine connector and a sputum suction tube connector. The sputum suction pipe is connected with the sputum suction pipe connector through the sputum suction pipe first sleeve connector, and one part of the sputum suction pipe is rotationally connected with the sputum suction pipe first sleeve connector. A rotatable one-way valve is further arranged in the first sleeve connector of the sputum suction pipe, one end of a valve channel of the rotatable one-way valve is fixedly connected with the sputum suction pipe, and a pipeline of the sputum suction pipe is communicated with the valve channel of the rotatable one-way valve. According to the sputum suction tube, the rotatable design is adopted, the position of the tube can be adjusted according to needs, the sputum suction tube is more suitable for a tracheostomy catheter of a patient, the stability of a breathing machine loop is not affected, and meanwhile the problem that the patient feels uncomfortable due to improper height and angle is solved.

The invention provides a fermentation process prediction method and system based on a generative algorithm and a terminal, and the method comprises the steps: firstly, comprehensively collecting various fermentation parameters in the whole life cycle of biological fermentation, and carrying out the fine preprocessing of the parameters, thereby constructing a sample data set; then, aiming at the constructed sample data set, deeply mining domain features closely related to the fermentation process, and establishing a model to construct a data set according to the domain features; on the basis, one or more generative algorithms are used, and a staged generative model is constructed according to the model construction data set. Finally, the fermentation process is accurately predicted according to the input fermentation parameters by means of the constructed staged generation model, and then a reliable prediction result is obtained. According to the method, on the basis that the effectiveness of data set division and the stability of model training are not affected, domain features are effectively fused in the modeling process, and the prediction precision and generalization ability of the model are remarkably improved.

The utility model discloses a stainless steel wire rope with an anti-twisting function, and particularly relates to the field of steel wire ropes, the stainless steel wire rope comprises a steel wire rope body, a plurality of fixing sleeves are sleeved in the middle of the steel wire rope body, connecting blocks are symmetrically arranged at two ends of the steel wire rope body, and a lock hook is arranged at one end of each connecting block. The opposite sides of the connecting block and the lock hook are fixedly connected with a fixing block and a connecting disc correspondingly. Firstly, the connecting block is connected with the steel wire rope body, and the lock hook is connected with the connecting block through the fixing block and the connecting disc, so that the stability of the steel wire rope body and the connecting block cannot be influenced when the lock hook rotates, and the lock hook can automatically rotate when the steel wire rope body is straightened from a winding state to generate torsion by pulling the lock hook; and the thread inserting rod is inserted into the thread hole and penetrates through the folded end of the steel wire rope body, so that the steel wire rope body and the connecting block can be conveniently connected and detached, and combined use is facilitated.

The invention discloses a composition with an anti-aging effect and a preparation method and application thereof, and belongs to the technical field of cosmetics. The composition is prepared by compounding a traditional Chinese medicine active component, a moisturizing and permeation promoting component and a repairing and anti-aging auxiliary component, and the traditional Chinese medicine active component is composed of three zymolytes and three fermentation extracts which are respectively prepared from six medicinal and edible traditional Chinese medicine raw materials through differentiated composite enzymolysis and probiotic anaerobic fermentation processes. The problems that traditional Chinese medicine extracts are low in transdermal absorption rate, poor in bioavailability and insufficient in cosmetic system stability are solved, active ingredients are small-molecularized through process optimization, a multi-target synergistic anti-aging system is formed by matching with functional components, the anti-aging and repairing composition has excellent anti-aging and repairing effects, physical and chemical stability and skin safety, and the anti-aging and repairing composition has a good application prospect. The composition is suitable for various skin types and can be widely applied to preparation of anti-aging repair cosmetics.

This invention provides an active heating method and system for a two-dimensional turntable servo mechanism, belonging to the field of laser communication technology. The method includes acquiring the feedback temperature and motor torque of the azimuth or pitch axis; when the motor torque is zero and the difference between the feedback temperature and the preset temperature is outside the preset temperature range, heating is performed by determining a first heating power based on the first d-axis current and the electrical control angle; when the motor torque is not zero and the difference between the feedback temperature and the preset temperature is outside the preset temperature range, heating is performed by determining a second heating power based on the second d-axis current and the q-axis current, until the temperature difference returns to the preset range and heating stops. This invention utilizes the heat generated by the motor's own current to replace external heating devices, achieving uniform heating from within, effectively reducing deformation and frictional torque fluctuations in key moving parts caused by temperature gradients, and improving the turning table's pointing accuracy and thermal stability under extreme temperature changes.

This application provides a data migration method, apparatus, control device, and readable storage medium. The method includes: creating a migration link between a source database and a destination database of data to be migrated; splitting the data to be migrated and the migration link, and stopping the splitting if the running status information of the migration link becomes abnormal. In this application, the method of splitting the migration link significantly increases the overall migration rate of the entire data migration; and by obtaining the running status information of the migration link, a controllable increase in the migration rate is achieved, effectively improving the migration speed.

The utility model relates to CCD visual scanning technology field, concretely is a kind of CCD visual scanning equipment, including organism, the foot cup is equipped in the organism bottom, the foot cup is equipped with several, the working platform is equipped in the organism top, scanning machine module is equipped on the working platform, scanning machine module setting includes substrate, double Y direction sliding base, double Y direction screw rod, Y direction servo motor, scanning device, X direction servo motor, X direction sliding base, Z direction screw rod, Z direction motor and point gum device, a kind of CCD visual scanning machine of the utility model, through the photographing range and focal length height of line scanning camera setting, equipment will automatically move X axis, Y axis, C axis to the product in range and carry out photographing identification, after setting C axis scanning camera height, photographing identification is completed, and product model and point gum track are set on software, after setting is completed, start, equipment will automatically move X axis, Y axis, C axis moves to the point gum track set and starts point gum valve to complete point gum technology.

The invention relates to the technical field of network equipment, discloses a dynamic networking network equipment operation platform, and solves the problems that an existing server is very troublesome to disassemble and assemble, an operator cannot maintain the server conveniently, the stability of plug connection is influenced by accidental pulling of a line in use, and the use effect is poor. The device comprises a device shell, a device bottom plate is arranged at the bottom of the device shell, a mounting block is fixedly mounted at the top of the device shell, four connecting ports are formed in the rear side of the mounting block, a supporting frame is fixedly mounted at the top of the mounting block, and a driving motor is fixedly mounted at the inner top of the supporting frame; two positioning strips are symmetrically arranged on the upper side and the lower side of the rear portion of the installation block, and silica gel pads are fixedly installed on the sides, close to each other, of the two positioning strips. The server can be quickly disassembled and assembled, an operator can conveniently maintain the server, the stability of plug connection is not affected by accidental pulling of a circuit in use, and the server has a very good use effect.

The utility model discloses a car roof wheel upper beam assembly easy to disassemble and assemble, which comprises two upper beams arranged side by side in parallel, an upper beam connecting plate fixedly connected with the upper beams to keep the upper beams parallel, a car roof wheel with the axis perpendicular to the upper beams and positioned between the two upper beams, and a shaft clamping plate detachably and fixedly mounted on the inner side surfaces of the upper beams, the shaft clamping plate is provided with a supporting hole which allows the end of a wheel shaft of the car roof wheel to penetrate in a matched mode and is located above the upper beam. A shaft clamping plate which is detachably and fixedly installed on the upper beams is arranged between the two upper beams, a supporting hole for a car roof wheel axle to penetrate through is formed in the shaft clamping plate, and the car roof wheel is installed through the shaft clamping plate. The car roof wheel can be disassembled by disassembling the shaft clamping plate, the upper beam body does not need to be disassembled, and the car roof wheel is convenient to disassemble and replace. The two ends of the upper beam connecting plate are fixedly connected with the upper beam, and the stability of the main body structure of the upper beam is not affected in the process of disassembling and assembling the car roof wheel.

The present invention relates to a modified fly ash-based mining filling material and a preparation method thereof, wherein the material comprises components such as modified fly ash, lime, cement, gypsum, sodium sulfate and epoxy resin. The dispersibility of fly ash is improved by using a composite modification system of nitrogen-containing silane coupling agent, triethanolamine and organic acid, so that the fly ash is evenly distributed in the slurry; lime, gypsum and sodium sulfate are used as activators, so that the filling material maintains good strength and stability at high temperatures, avoiding the risk of structural damage due to temperature increase; at the same time, the material will not be excessively brittle or have reduced strength under low temperature conditions. In addition, the added epoxy resin can effectively bond materials such as fly ash and cement into a filling body with certain strength and stability due to its excellent bonding properties. The epoxy resin also helps to reduce the internal stress and deformation of the material after curing, ensuring the long-term stability of the filling body. The filling material of the present invention is particularly suitable for mine filling and support operations, and can provide a reliable filling effect under extreme temperature conditions.

This invention discloses a bending fatigue enhancement structure for flat cables, relating to the field of flat cable technology. It includes a wear-resistant outer sheath, a flexible skeleton, an elastic inner liner, and a composite conductor bundle. The wear-resistant outer sheath covers the flexible skeleton, with bending stress cores at the outer ends. The flexible skeleton is internally covered by an elastic inner liner, which contains two spaced-apart composite conductor bundles. The flexible skeleton has grooves filled with an anti-oxidation coating layer, within which the bending stress cores are fixed. The interior features stress-dispersing adhesive grooves intersecting with the grooves, and high-toughness reinforcing ribs with abrasion-resistant protective sleeves are installed at the four corners. The elastic inner liner has a water-blocking tape wrapping layer on its outer side and a flame-retardant isolation layer inside. The composite conductor bundles are wrapped with cable core fixing rings and an electromagnetic shielding layer. This structure, through multiple stress dispersion, protection, and positioning designs, significantly improves the cable's bending fatigue resistance, ensuring stable transmission and safe operation, and is suitable for high-frequency bending scenarios.

The present invention provides an environmentally friendly terminator, preformulation, preparation and application of an emulsion styrene butadiene rubber polymerization system, wherein the environmentally friendly terminator is an aqueous solution; the mass concentration of the environmentally friendly terminator A ion is 20% to 40%; the mass concentration of the terminator B is 10% to 15%; the mass ratio of the terminator A ion to the terminator B is 10:1 to 1:1; the terminator A ion is a piperazine-N,N-bis-dithiocarbamate ion; and the terminator B is N-isopropylhydroxylamine. There is a bis-dithiocarbamate group in terminator A, and only a small amount can terminate the polymerization reaction. Terminator B is a nucleophilic acylating agent, which is rapid and effective in terminating the reaction. The environmentally friendly terminator directly destroys the peroxide in the system, quickly eliminates free radicals and initiators in the emulsion styrene butadiene rubber polymerization reaction, terminates the reaction and does not affect the stability of the emulsion.

The utility model discloses a hoisting type heat recovery fresh air machine which comprises a machine shell, an outdoor air inlet and an outdoor air outlet are formed in the side wall of the machine shell, and a first inserting groove and a second inserting groove are formed in the machine shell. The first inserting groove is located in the inner side of the outdoor air inlet and communicated with the outdoor air inlet. The second inserting groove is positioned on the inner side of the outdoor air outlet and is communicated with the outdoor air outlet; a first filter element and a second filter element are respectively inserted into the first inserting groove and the second inserting groove; outdoor fresh air passes through the outdoor air inlet and the first filter element and then enters the machine shell. And indoor air in the machine shell passes through the second filter element and then is exhausted from the outdoor air outlet. The hoisting type heat recovery fresh air machine can solve the problems that when the filter element of the hoisting type fresh air machine is replaced, the cover plate needs to be dismantled, and operation is inconvenient, and the filter element replacement process is simpler, more convenient and faster.

The application provides a motor drying device, which comprises a drying channel, a heating box and a three-way pipeline; the drying channel is used for providing a containing space for a motor to be dried; a fan is connected to an air inlet of the heating box; an output pipeline is in communication between an air outlet of the heating box and the drying channel; the heating box is configured to deliver air into the heating box through the fan, and deliver the heated air to the drying channel through the output pipeline, so as to dry the motor in the drying channel; a first end of the three-way pipeline is in communication with the output pipeline; a second end of the three-way pipeline is in communication with an air inlet of the fan; and a third end of the three-way pipeline is suspended outside the heating box. The scheme can save energy.

The invention relates to the technical field of power electronics, and discloses an IGBT (Insulated Gate Bipolar Translator) fixed-frequency voltage-regulating constant-current energy-saving device, which comprises a power supply module, an IGBT power module, a current sampling module, a driving module, a control module, a motor and a voltage acquisition module, the current sampling module is connected in series between the IGBT power module and a load, collects load current in real time and outputs a current feedback signal, and the driving module is used for outputting a driving signal with dead time to the IGBT power module. According to the invention, the effects that the dead time of the driving module is not fixed, the dynamic change of the load current is adapted and the energy-saving effect and the device stability are not influenced are realized, and the problems that the dead time of the driving module is fixed, the dynamic change of the load current cannot be adapted, the switching loss or the commutation peak is easy to generate and the power consumption is low in the prior art are solved. And the energy-saving effect and the stability of the device are influenced.

The utility model discloses a circuit breaker housing and an installation back frame, the circuit breaker housing comprises a housing main body, one side of the housing main body is provided with an installation groove, the surface of the installation groove is fixedly connected with connection insertion sheets, the number of the connection insertion sheets is two, and the connection insertion sheets are symmetrically distributed in the installation groove. First clamping grooves are formed in the sides, close to the mounting groove, of the top and the bottom of the shell body, and guide-in slopes are arranged on the sides, close to the back face of the shell body, of the clamping grooves. The back frame comprises the circuit breaker shell and further comprises a back plate, the section of the back plate is in a] shape, one side of the back plate is symmetrically and fixedly connected with first buckle plates of the second clamping grooves, the top and the bottom of the back plate are fixedly connected with second buckle plates of the first clamping grooves, and the surface of the back plate is further provided with mounting holes. The utility model relates to the technical field of circuit breaker fixation. According to the circuit breaker shell and the mounting back frame, the mounting stability is improved, and mounting is facilitated.

The present invention provides a screening method for improving the comprehensive performance of phosphate ester fire-resistant oil additives, which belongs to the technical field of phosphate ester fire-resistant oil, and specifically comprises preliminary screening and screening for the influence on the stability of phosphate ester fire-resistant oil. The preliminary screening can exclude in advance the types of additives that are not suitable for phosphate ester fire-resistant oil; the screening test for the influence on the stability of phosphate ester fire-resistant oil can avoid the problem that the types of additives that can improve the performance of phosphate ester fire-resistant oil but cause the accelerated deterioration of certain key indicators after the operation of phosphate ester fire-resistant oil are added to the phosphate ester fire-resistant oil, thereby shortening the service life of the phosphate ester fire-resistant oil; the problem that the addition of improper additives in the prior art seriously affects some indicators of phosphate ester fire-resistant oil or causes the phosphate fire-resistant oil to deteriorate faster during operation, shortens the service life of the phosphate fire-resistant oil, and affects the safe operation of steam turbine units in power plants is solved.

A novel hydraulic pump station for mining includes an oil tank, a frame, and a control valve assembly mounted on the oil tank. The oil tank is located on top of the frame, and an oil pump assembly is mounted on the frame directly below the oil tank. The interior of the oil tank is divided into a return oil zone and an intake oil zone by a partition. The oil inlet of the oil pump assembly is connected to the intake oil zone via an oil suction filter, and the oil outlet of the oil pump assembly is connected to the inlet of the control valve assembly via a two-stage high-pressure filter. Water coolers and spray mechanisms are installed on both the front and rear sides of the oil tank. The water inlet of the water cooler is connected to a mining static pressure water supply system, and the water outlet of the water cooler is connected to the water inlet of the spray mechanism. The oil inlet of the water cooler is connected to the return oil port of the control valve assembly, and the oil outlet of the water cooler is connected to the return oil zone via a return oil filter. This invention features a compact overall structure, meets the requirements for use in confined spaces, and offers high cooling efficiency.

The invention provides an advanced detection integral type drilling machine suitable for a roadway driving working face and a using method. One end of a dislocation unfolding mechanism is rotatably installed at the rear end of a right vehicle body platform, and the other end of the dislocation unfolding mechanism is installed on a left vehicle body platform in a sleeving mode; the left vehicle body platform can slide backwards in the longitudinal direction relative to the right vehicle body platform under driving of the dislocation unfolding mechanism, and sliding type longitudinal dislocation is achieved. The left vehicle body platform can be driven by the staggered unfolding mechanism to rotate around the rear end of the right vehicle body platform to be longitudinally unfolded. When a small-angle advanced manhole needs to be constructed in the left front of the driving face, the left vehicle body can slide backwards by a certain distance to protrude out of the position of the drilling device in the right vehicle body; when the roadway heading machine needs to make way, the forepoling drilling machine can walk to the position of the right roadway side, and after the upper and lower stable stand columns in the right vehicle body abut against a roadway top plate and a bottom plate, the left vehicle body is longitudinally unfolded and is close to the right roadway side, so that the width of the vehicle body of the forepoling drilling machine is reduced, and the roadway heading machine can smoothly pass through.

The present invention discloses a pretreatment device for deep treatment of landfill leachate, which relates to the technical field of landfill leachate treatment, and includes: a pipeline, a bearing mechanism is installed in the middle of the pipeline, and the water flow in the inner cavity of the pipeline is used for the power drive of the bearing mechanism; it also includes a connecting mechanism for the intake of nitrogen in the inner cavity of the pipeline; a fixed pipe is fixedly inserted in the top of the pipeline; a positioning mechanism is arranged in the inner cavity and the top of the pipeline, and the positioning mechanism is used for intermittent mixing and adding medicine and ultraviolet sterilization in the inner cavity of the pipeline. The present invention uses a setting method in which a connecting mechanism and a water retaining component are matched, and through the bearing mechanism, its movable component can swing, which is convenient for intermittent feeding of powder, and its disinfection component can sterilize the water circulating in the pipeline, and the movable component drives the disinfection component to swing, reducing the splashing of liquid onto the ultraviolet lamp, so as to achieve rapid deep sterilization of the liquid, and the structure is simple and the engineering workload is small.

The present invention relates to the field of A61K8 / 18, and specifically to a mild and effective anti-dandruff composition and a preparation method and application thereof. The mild and effective anti-dandruff composition comprises at least an acrylate copolymer containing an amino group in a side chain, a long-chain alkyl glycol and a short-chain alkyl alcohol, wherein the number of carbon atoms in the long-chain alkyl glycol is ≥7, and the short-chain alkyl alcohol is at least one of a C2-C6 monohydric alcohol, a dihydric alcohol and a trihydric alcohol. By combining an acrylate / dimethylaminoethyl methacrylate copolymer and 1,2-decanediol in the presence of 1,3-butylene glycol, the provided anti-dandruff composition will not cause irritation after acting on the scalp, is safe and mild, and has an effective Malassezia inhibition effect and oil control effect, thereby ensuring an excellent anti-dandruff effect, and effectively solving the problems of dandruff and scalp itching caused by the existing small molecule anti-dandruff agent penetrating into the scalp to cause irritation, and the sebum deterioration caused by excessive scalp sebum secretion or long-term non-cleaning.

This invention discloses a high-temperature solar thermal energy storage power generation system for emerging energy generation, belonging to the field of high-temperature solar thermal energy storage power generation technology. The system includes a solar field heat collection unit, a high-temperature fluid circuit, a generator set, a converter, and a transformer. An active common-mode cancellation circuit is connected in parallel between the positive and negative DC bus of the converter. The system is also equipped with a temperature sensor group, a common-mode voltage sensor, and a controller. The controller calculates the common-mode equivalent impedance based on the temperature signal of the high-temperature conductive fluid and calculates the compensation voltage based on the detected transient common-mode voltage. It drives the active common-mode cancellation circuit to output a compensation voltage with opposite polarity and equal amplitude to the transient common-mode voltage and injects it into the common-mode coupling node. This suppresses the common-mode voltage from the electrical conversion source of the converter, cuts off the high-frequency leakage current path formed by the parasitic capacitance coupling between the high-temperature conductive fluid and the pipe wall, suppresses the electrochemical corrosion of the pipeline of the high-temperature solar thermal energy storage system, and extends the service life of the system. It is suitable for high-temperature solar thermal energy storage grid-connected power generation systems.

The present invention discloses an anti-vibration platform based on a microscopic automatic shooting system, which relates to the technical field of algae analyzers. In order to solve the problem that the existing algae artificial intelligence analyzer does not have an anti-vibration scanning platform and has poor anti-vibration performance, a slightly larger vibration will affect the imaging. Therefore, during the working process, when the staff or other personnel touch the workbench, it will cause a slight vibration of the workbench, and this kind of slight vibration cannot be detected by the staff, which will cause the problem of incorrect data when shooting and analyzing the algae. A through groove is provided inside the table top of the workbench, and an adjustment mechanism is provided inside the through groove. A platform mechanism is provided above the adjustment mechanism, and a mounting plate is provided on one side of the platform mechanism. A vibration sensor is fixedly installed on the rear end of the upper surface of the mounting plate, and an alarm is fixedly installed on the front end of the upper surface of the mounting plate. The alarm is electrically connected to the vibration sensor through a wire.

The invention discloses a modular pavement drainage system for a gentle slope section of a wide road and a setting method, and belongs to the technical field of drainage engineering, the modular pavement drainage system comprises a middle lane drainage structure and a transverse drainage pipe; the transverse drainage pipe is located below the pavement cushion layer and perpendicular to the route direction of the road, one end of the transverse drainage pipe is connected with the middle lane drainage structure, and the other end is connected with a drainage ditch or an urban pipe network of the embankment; the middle lane drainage structure is located between the pavement of the middle lane of the half-width road of the wide road and the transverse drainage pipe, and the lower portion of the middle lane drainage structure is communicated with the transverse drainage pipe. The method has the beneficial effects that the drainage facility is arranged on the middle lane, a single long runoff path of the wide road surface is cut off, and the original drainage length of a single 4-5 lane is converted into the drainage length of a 2-3 lane, so that the retention time of rainwater on the road surface can be remarkably shortened, the drainage efficiency of the wide road surface is improved, and the drainage effect of the wide road surface is improved. The water film thickness caused by road surface runoff is reduced, and the driving safety in rainy days is improved.

The invention relates to a KASP-SNP molecular marker primer for identifying modern Chinese rose varieties, a composition and application of the KASP-SNP molecular marker primer and the composition. The molecular marker primer comprises KASP-SNP1-KASP-SNP35, and nucleotide sequences of the KASP-SNP1-KASP-SNP35 are shown as SEQ ID NO.1-105. On the basis of whole genome re-sequencing data, 35 high-polymorphism SNP loci are screened out, specific primers are designed, fluorescence signals of a sample to be detected are detected through a KASP technical platform, genotypes can be automatically interpreted, and a DNA fingerprint spectrum unique to varieties can be constructed. The marking system has the advantages of high flux, strong specificity, objective and stable result, no environmental influence and the like, and can be used for precise identification of modern Chinese rose varieties, genetic relationship and genetic diversity analysis, DUS test assistance and molecular marker-assisted selective breeding.

The utility model belongs to the technical field of evaporation, and relates to rotary double-point-source evaporation equipment with stable coating rate, which comprises an evaporation cavity, a rotary mechanism, a plurality of evaporation point sources, a carrier plate conveying mechanism and a baffle plate, and the carrier plate conveying mechanism supports two sides of a carrier plate so as to expose the lower surface of the carrier plate. The baffle is provided with two evaporation holes allowing the two evaporation point sources to conduct upward evaporation correspondingly, the two evaporation holes are in mirror symmetry with the conveying center face of the carrier plate as the symmetry plane and in central symmetry with the center point of the rotating mechanism as the circle center, the evaporation holes are located at the evaporation positions, and the baffle is further provided with two preheating positions. And each preheating position is located at the position with the included angle of 180 degrees / n of the evaporation position. According to the equipment, the next pair of evaporation point sources can be preheated in advance when one pair of evaporation point sources is about to reach the use end point, and the next pair of evaporation point sources are seamlessly switched after the previous pair of evaporation point sources reaches the preset evaporation time, so that the change of the evaporation point sources does not influence the stability of the coating speed, and the evaporation quality is ensured.

The invention discloses a zinc-alkene coating still having long-term protection capability after being damaged and a preparation method thereof.The zinc-alkene coating still having long-term protection capability after being damaged comprises a component A and a component B. The mass ratio of the component A to the component B is 1: 2.5-4. The component A comprises an epoxy resin emulsion, a thickening agent, a wetting agent, a defoaming agent, an anti-flash-rust agent, deionized water and a graphene dispersion liquid, and the component B comprises a curing agent, an adhesion promoter, a dispersing agent, a defoaming agent, a rheological additive, mica powder, an active pigment, zinc powder and a solvent. A coating prepared from the coating has excellent corrosion resistance, particularly has excellent corrosion spreading resistance, and can still provide excellent protection capability after being damaged, the service time of the coating is prolonged, the repair frequency of the coating is reduced, and the maintenance cost is greatly reduced.

The utility model relates to the field of circuit board assembly production, and discloses a circuit board assembly jig, which comprises a bottom plate, a sliding seat and an overturning plate, the sliding seat is slidably arranged on the bottom plate, and the sliding track of the sliding seat comprises a first position and a second position; one side of the turnover plate is rotationally connected with the sliding seat, the turnover plate is supported on the bottom plate and is provided with a containing cavity used for containing and positioning the circuit board, and the inner wall of the containing cavity is provided with a receding opening used for exposing the to-be-machined positions of the front face and the back face of the circuit board; the turnover plate comprises a first processing position and a second processing position, when the turnover plate is at the first processing position, the front surface of the circuit board faces upwards, and the sliding seat is at the first position; and when the overturning plate is overturned to a second processing position around the sliding seat, the back surface of the circuit board faces upwards, the sliding seat slides to the second position, and the first processing position and the second processing position are overlapped. The circuit board assembling jig provided by the utility model can solve the problem of how to reduce the occupied space of the jig on the premise of not influencing the stability of the circuit board processing process.