Automatic area vanning device of receiving of amorphous strip

Automatic area vanning device of receiving of amorphous strip, which comprises a frame, be provided with a plurality of mouths that advance to take in the frame, advance to take a mouthful back correspondence to be provided with receipts at every and take sorption wheel, each is received and takes sorption wheel to connect in the drive shaft, actuating shaft connection rotary driving power device,take sorption wheel below or oblique below to be provided with a stripping plate in every receipts, the stripping plate below of taking sorption wheel to correspond in each receipts is provided withthe strip containing box, the strip containing box directly or indirectly sets up on linear guide, directly or indirectly be connected with straight reciprocating motion drive arrangement on the stripcontaining box. This device simple structure, the benefit that nevertheless produces is huge.

Pixel structure

Escalator safety control system and method based on two-dimension laser sensor

The invention discloses an escalator safety control system and an escalator safety control method based on a two-dimension laser sensor, wherein the escalator control system comprises a two-dimension laser sensor, a data processor and a controller; the method comprises that the two-dimension laser sensor is used to monitor stairstep displacement amount; the monitored datum are processed by the data processor and the monitored datum are judged to be beyond the threshold value or not, and alarm signals are sent out; and a safety circuit is cut off by the controller and the emergency braking is realized. According to the invention, the two-dimension laser sensor is used to timely monitor all the stairsteps of the escalator; a data processing module is used to judge the running situation of the escalator according to the detection; the controller is used accurately and rapidly to process the fault of the escalator, so life and property safety of a passenger on the escalator are ensured; according ...

Insulating shield live-line installation mechanism suitable for voltage transformer

The invention relates to an insulating shield live-line mounting mechanism suitable for a voltage transformer. The insulating shield live-line mounting mechanism comprises an insulating shield and an operating rod, the insulating shield comprises a fixed shell, movable plates capable of being opened or closed are arranged on the two sides of the fixed shell respectively, and when the two movable plates are closed, the two movable plates and the fixed shell define a cavity capable of being sleeved with the voltage transformer. A springback structure is arranged on the fixed shell, and the springback structure is connected to the movable plate and used for driving the movable plate to be elastically closed; the top of the operating rod is provided with a protective cover sliding connection mechanism, two sides of the protective cover sliding connection mechanism are respectively provided with a sliding groove, and the two sliding grooves are respectively connected with two opened movable ...

Method for rapidly detecting balance coefficient, braking force and traction force of elevator driving main engine

The invention discloses a method for rapidly detecting the balance coefficient, the braking force and the traction force of an elevator driving host. The method comprises the steps that whether the elevator balance coefficient K is qualified or not is judged; judging whether the single-brake braking force of the elevator is qualified or not according to the single-brake brake torque output value M1 and the maximum frequency converter output total torque Mall1 of the single brake; whether the elevator double-brake braking force is qualified or not is judged according to the torque output value M2 of the double-brake brake and the maximum output total torque Mall2 of the double-brake frequency converter; after the ascending test speed of no-load of the elevator is calculated, one speed measuring encoder is used for measuring the braking deceleration a and distance of a traction steel wire rope when the elevator runs upwards at the upper end of a hoistway and starts braking, and finally whether ...

Magnetic core inductance list circle and compatible testing arrangement of ten circles

Magnetic core inductance list circle and compatible testing arrangement of ten circles including the frame, is provided with magnetic core positioner and inductance test device in the frame, magneticcore positioner top is provided with the measuring head, goes up the measuring head and connects on vertical cylinder, and magnetic core positioner below is provided with down the measuring head, andlower measuring head is connected on horizontal cylinder, last measuring head on have 10 contact pilotages from last under to, 10 contact pilotages are A1 to A10 respectively, lower measuring head onfrom last to have down with last measuring head on 10 contacts that the contact pilotage is corresponding, 10 contacts are B1 to B10 respectively, bn contact on the measuring head is put through through a wire and the an+1 contact on the last measuring head mutually down. This device efficiency of software testing is high.

Supporting structure of settling tank

The invention belongs to the field of settling tanks, and particularly relates to a settling tank supporting structure which comprises a conical tank bottom. The radial beam is arranged below the conical-surface-shaped groove bottom in the radial direction of the conical-surface-shaped groove bottom; the outer stand column is mounted below the outer end of the radial beam; the inner stand column is mounted below the inner end of the radial beam; the outer ends of the radial beams are hinged to the outer stand columns, and the inner ends of the radial beams are in lap joint with the inner stand columns. A retaining mechanism is arranged between the outer end of the radial beam and the outer stand column. The outer ends of the radial beams are hinged to the outer stand columns, the other ends of the radial beams are in lap joint with the inner stand columns, the installation difficulty of the radial beams is reduced, meanwhile, internal stress is avoided, and the reliability of the supporting ...

Village public data intelligent management system

The invention relates to the technical field of digital data processing, in particular to a village public data intelligent management system. The system comprises a village data public platform database, an entry capturing module, a data processing module and an information management module, wherein the data processing module further comprises a keyword labeling module, a keyword decision index module, a public information vector processing module, a phrase induction module, a phrase weight module and a decision optimization ratio module. According to the method, the situation that words with the same frequency in the disclosed village information reduce the classification accuracy of the whole village information can be avoided, and the follow-up measurement of the similarity degree between the village information is facilitated. And secondly, a decision optimization ratio is constructed based on public vectors, so that the influence of a small amount of words in special village public ...

Water-soluble silicon cutting fluid and its application thereof

The invention discloses a water-soluble silicon cutting fluid and an application, which comprises the following ingredients by weight percentage: 5-35% of fatty alcohol polyoxyethylene ether, 0.5-5% of chelating agent, 1-6% of solubilizer, 0.5-5% of ether alcohols activator, 0.003-0.1% of bactericide and the balance of water. The water-soluble silicon cutting fluid has extremely good anti-extreme pressure lubrication performance, large density and extremely good levelability and dispersibility, so that SiC is uniformly dispersed in the cutting fluid, the problems of cutting and re-deposition of the granule powder can be effectively solved; stable viscosity can be maintained in the cutting process, and the water-soluble silicon cutting fluid has good wetability and can increase the work efficiency.

Heat-stress?resistance regulator for dogs

The invention belongs to the technical field of production of animal feed additives, and concretely relates to a heat-stress resistance regulator for dogs. The heat-stress resistance regulator for dogs comprises the following ingredients: glutamine 18%, taurine 18%, beta glucan 18%, VC 23%, VE 9%, organic chromium 1%, organic selenium 1%, and organic zinc 11%. The heat-stress resistance regulator for dogs contains various nutrients and bioactive substances, and can fully regulate the body's physiological function. The regulator has features of such as reliable resources of the ingredients, quality assurance, processing convenience, stable composition, no residue, non-toxic and no drug resistance. The test results show that the regulator can make the dog's physiological and biochemical indicators tend to be stable in the thermal environment, maintain normal immune function, regulate endocrine, and reduce the damage on cell due to heat stress.

Agricultural product marketing budget management method and system

The invention relates to an agricultural product marketing budget management method and system, and belongs to the technical field of marketing data processing, and the method comprises the steps: obtaining a marketing investment return rate time sequence corresponding to each budget fund distribution instance under each budget type label in enterprise historical data; according to the marketing investment return rate time sequence, calculating a short-time-efficiency characteristic value and a long-time-efficiency characteristic value of each budget fund allocation instance under each budget type label; according to the short-time-efficiency characteristic value and the long-time-efficiency characteristic value, calculating a fund priority allocation regulation and control timestamp of each budget declaration project; examining and approving each budget declaration item according to the fund distribution regulation and control timestamp of each budget declaration item; the invention provides ...

Method for making organic electroluminescent element and method for making poly-carbon film

Side curring and sizing die mechanism for fender of automobile covering part

The invention discloses a side curring and sizing die mechanism for a fender of an automobile covering part. The side curring and sizing die mechanism comprises an upper die slotting tool, one side of the upper die slotting tool is fixed to a first wedge driving plate, the other side of the first wedge driving plate is provided with a second wedge driving plate, the other side of the second wedge driving plate is provided with a wedge sliding block, a rotating wedge is arranged on the wedge sliding block, the side edge of the upper portion of the wedge sliding block is provided with a third wedge driving plate, the side edge of the lower portion of the rotating wedge is provided with a fourth wedge driving plate, the third wedge driving plate and the fourth wedge driving plate are arranged oppositely, a rotating guide pillar is arranged in the rotating wedge in a penetrating mode, the rotating guide pillar is driven by the four wedge driving plate to rotate, and a nitrogen spring for driving ...

Automatic escalator safety control system based on two dimension laser sensor

The utility model discloses an automatic escalator safety control system based on two dimension laser sensor, its system includes two -dimentional laser sensor for the displacement volume of monitoring automatic escalator step, data processing device for whether the automatic escalator step displacement volume that the monitoring obtained to two -dimentional laser sensor is handled, judge to exceed and set for the threshold value and send alarm signal, and controlling means for the alarm signal who sends according to data processing device cuts off safety loop, realizes automatic escalator's emergency braking function. The utility model discloses a two dimension laser sensor carries out real -time supervision to all steps of automatic escalator, adopts data processing module to judge the automatic escalator operational aspect according to detecting to the copy control device is accurate, and the rapid trouble to automatic escalator took place is handled, has guaranteed automatic escalator ...

Preparation method and application of superacid compound ionic liquid

The invention discloses a superacid compound ionic liquid, and a preparation method and application thereof. The preparation method comprises a first step of adding metal oxide ZrO2, TiO2, Fe2O3 or SnO2 into a sulfated sulfonic acid ionic liquid and a second step of carrying out mixing. The invention has the following advantages: the preparation method is simple; the superacid compound ionic liquid has a high acid value, fully contacts with reactant and has good desulphurization activity; after completion of desulphurization, the superacid compound ionic liquid is subjected to simple settlement and separation, and after simple filtering and washing, the superacid compound ionic liquid can be repeatedly used; reaction conditions are mild; and the superacid compound ionic liquid has no corrosivity to equipment, is stable in moisture and air and nonvolatile, does not need hydrogen peroxide oxidizing agent, has an acid site and oxidation and extraction centers and can realize greenization in ...

Dysmorphism protects a box finished product magnetic core test system

Dysmorphism protects a box finished product magnetic core test system, including frame and tester, the tester include that the test needle tests the needle under and, be provided with feed bin and rotary disk in the frame, be provided with the magnetic core export on the rotary disk, be provided with the decurrent spout of slope in the magnetic core exit, be provided with floodgate door baffle plate on the spout, the tester sets up after floodgate door baffle plate, after indicate the flow direction of magnetic core, test the needle and descend to test the needle sliding chute position that corresponds and set up porosely on the tester, on test the upper portion of needle position in the spout, test the lower part of needle position in the spout down, be provided with the test baffle on the spout after the tester, floodgate door baffle plate with the test baffle all be connected with drive arrangement. This test system has improved production efficiency greatly.

Semiconductor industrial cleaning agent and application thereof

The invention discloses a semiconductor industrial cleaning agent and an application thereof, and the semiconductor industrial cleaning agent is characterized by comprising 0.5-9.5% of acid agent, 5-35% of surfactant, 0.1-2.0% of antistatic agent, 1-6% of solubiliser, 1-4% of corrosion inhibitor, 0.1-2.0% of bactericide and the balance of deionized water. The water-based cleaning agent used for polycrystalline silicon chips is colorless transparent or semitransparent liquid; The semiconductor industrial cleaning agent has extremely high surface activity characteristic enables extremely low surface tension, its unique netted chemical structure provides high linearity and high suspensibility, invasion of microbe can be effectively defensed, no corruption and no deterioration are ensured during an usage process, no smelliness is generated, the cost is saved for user, the waste liquid discharge is reduced, the semiconductor industrial cleaning agent is in favor of environmental protection, ...

Elevator load alarm detection device

The invention provides an elevator load alarm detection device which comprises a loading beam frame, a force measuring assembly, a force transferring assembly, a power assembly and a transmission assembly. The power assembly is fixedly connected to the loading beam frame and pushes the force measuring assembly to move through the transmission assembly, the force measuring assembly is connected with the force transferring assembly, and the force transferring assembly moves along with the force measuring assembly so as to be loaded on an elevator rope hitch plate fixed to the loading beam frame. The elevator load alarm detection device has the advantages that a traditional weight loading method through an elevator cab is replaced by a weight loading method through a motor, work efficiency of testing is improved, and labor intensity is reduced; in addition, the elevator load alarm detection device can be applied to different elevator rope hitch plates thanks to rotational joints of the loading ...

Waterproof elevator control system based on talent for swimming sensor

The utility model discloses a waterproof elevator control system based on talent for swimming sensor, its system includes the talent for swimming sensor for detect and send control signal humidity, controlling means for the control signal who sends according to the talent for swimming sensor controls elevator equipment, waterproof type electric traction subsystem for realize the groundwork function of elevator, the talent for swimming sensor is connected with the sub - system communication of waterproof type electric traction with controlling means, controlling means. The utility model discloses broken through when the restriction that ordinary elevator is high -rise when the conflagration breaing out can not flee with the help of the elevator, reduced the manufacturing cost of elevator, guaranteed elevator and user of service's life safety.

Decentralized data transaction method and system based on Ethereum and IPFS

The invention provides a decentralized data transaction method based on Ethereum and IPFS. The decentralized data transaction method comprises the following steps: deploying an intelligent contract on a public chain; the seller S uploads the data to a data transaction platform DTP; the data transaction platform DTP performs data encryption on the uploaded data to obtain encrypted data, and sends the encrypted data to an interstellar file system IPFS for storage; the buyer B sends a transaction request to a data transaction platform DTP; the DTP calls the transfer method of the smart contract according to the transaction request, and sends the transfer method to the buyer B; the buyer B completes payment according to the transfer method and updates the authorization list in the smart contract; the buyer B sends a data downloading request to a data transaction platform DTP; the invention further provides a decentralized data transaction system based on the Ethereum and the IPFS. According ...

Metal compound-type arsenic removal agent, preparation method and application thereof

The invention discloses a metal compound-type arsenic removal agent, a preparation method and an application thereof, the metal compound-type arsenic removal agent is composed of a carrier and a metal active ingredient loaded on the carrier; the carrier is active carbon, and the metal active ingredient is more than one selected from copper, iron, nickel or silver. The arsenic removal agent has the advantages of simple production technology, large specific surface area, and good active metal dispersibility, deep arsenic removal of the oil product can be realized, surface acidity is low, the colloid generation is reduced, so that the arsenic removal agent is benefit for prolonging the regeneration period of a catalyst, the arsenic removal agent has the advantages of high arsenic removal rate and low energy consumption, and is suitable for large-scale industrial production, and can be used for removing arsenic from the light dydrocarbon materials such as propylene, ethene and deeply purifying ...

Compressible type side positioning mechanism for hemming die

The invention discloses a compressible type side positioning mechanism for a hemming die. The compressible type side positioning mechanism comprises first angle steel, wherein a blocking plate is arranged at the outer side of a vertical surface of the first angle steel, and an adjusting screw rod penetrates through the blocking plate and the vertical surface to the first angle steel to be arranged in a vertical surface of second angle steel in a penetrating way; a positioning nut sleeved on the adjusting screw rod is arranged at the inner side of the vertical surface of the second angle steel, and a guide rod vertical to a horizontal surface of the second angle steel is inserted into the horizontal surface of the second angle steel; the top end of the guide rod penetrates through the horizontal surface of the second angle steel to be fixed with a locking nut, and a pressing cylinder fixedly arranged on the horizontal surface of the second angle steel is arranged outside; a spring assembly ...

Normal-temperature dechlorination agent and preparation method thereof

The invention provides a normal-temperature dechlorination agent and a preparation method thereof. The normal-temperature dechlorination agent comprises a carrier, an active component MOF material supported by the carrier, and an adhesive agent calcium hydroxide; the MOF material is prepared by dissolving an organic ligand and metal ions in a solvent through a hydrothermal reaction method; the organic ligand is selected from substituted or unsubstituted aromatic polycarboxylic acids containing one or more rings, and from substituted or unsubstituted aromatic polycarboxylic acids containing at least a hetero atom and containing one or more rings; and the metal ligand is most preferably selected from nitrates or chlorides. The normal-temperature dechlorination agent has relatively large specific surface area, simple in synthetic technology, superior in performances and wide in application scope.

High formwork system

The utility model discloses a high formwork system, including bottom sprag steel pipe, the vertical steel pipe of lateral part, concrete entity die block board with to the pull rod, the vertical steel pipe of lateral part passes through fastener and bottom sprag steel pipe fixed connection, at least, set up to four groups the pull rod, pass through split bolt welding and the vertical steel pipe fixed connection of lateral part to the pull rod, concrete entity die block board pass through split bolt with to pull rod fixed connection. This high formwork system has effectively guaranteed high formwork system's firmness to have improved the efficiency of construction, controls support system quality easily, and simultaneously, the utility model has the advantages of simple structure, construction convenience, firm reliable, factor of safety is big, it worth to have practical application.

Organic electroluminescence display

Chimney reverse mould system

The utility model discloses a chimney reverse mould system, including fixture, centre form reinforcing ring muscle, upper inner formword, support steel pipe, lower floor's inner formword, exterior sheathing and high concrete wall, fixture pass through the draw -in groove respectively with upper inner formword and exterior sheathing fixed connection, the outside hoop of exterior sheathing has external mold reinforcing ring muscle, centre form reinforcing ring muscle binds round the outside at upper inner formword and lower floor's inner formword respectively, exterior sheathing and lower floor's inner formword pass through the outside fixed connection of reinforcing ring muscle and high concrete wall. This chimney reverse mould system, its easy operation has saved time and labour, convenient during the form removal, only need unclamp flat head screw alright remove, the broken ring to making up the thing, saved for lower one process time is shortened, need not pass the template and reinforce ...

Waterproof elevator control system and method based on water sense sensor

The invention discloses a waterproof elevator control system and method based on a water sense sensor. The system comprises the water sense sensor, a control device and a waterproof electric traction subsystem. The method comprises the steps that the water sense sensor is used for detecting humidity and sending a control signal, the control device is used for controlling an elevator, and the waterproof electric traction subsystem is used for achieving the basic working function of the elevator. The waterproof elevator control system and method overcome the defect that escaping cannot be achieved through a common elevator when fire breaks out in a high rise, the manufacturing cost of the elevator is reduced, and the safety of the elevator and the life safety of users are guaranteed.

Amorphous strip coil is around quick -witted tape feeding device

The utility model provides an amorphous strip coil is around quick -witted tape feeding device, includes the frame, is provided with blowing dish, guide pulley and winding axle in the frame, turn after the guide pulley is epaxial to twining by a U -shaped from doing downwards on the blowing dish for the strip, blowing dish and winding axle all adopt the servo motor drive, the servo motor electricity is connected to PLC, is provided with contact strip detection dish in the below of strip U -shaped bottom, strip detection dish electricity is connected to PLC, PLC is according to the servo motor's of the signal control drive blowing dish of strip detection dish rotational speed. The position sigual detection accuracy in winder mountain belts material U -shaped bottom is used to this device, can not take place the position sigual wrong report for the coiling can go on smoothly.

Equipment installation scheme simulation development method and device based on CAM platform

The invention discloses an equipment installation scheme simulation development method and device based on a CAM platform and belongs to the field of equipment installation. The method comprises the steps of acquiring multiple equipment models out of equipment models which are established in advance according to determined equipment installation technical requirements and properties of various components of equipment, wherein the multiple equipment models are in the same preset proportion to actual dimensions of the multiple equipment; according to the determined equipment installation technical requirements and the acquired multiple equipment models, simulating an equipment installation process; when the equipment installation process is simulated successfully, acquiring motion parameters and assembling relationships among the multiple equipment models and crane positions; according to the motion parameters and the assembling relationships among the multiple equipment models and the crane ...

Cooling device for mass concrete construction

The invention belongs to the technical field of building construction, and particularly relates to a cooling device for mass concrete construction. A through hole for the cooling water pipe to penetrate through is formed in the aluminum template; the valve body is mounted on the outer side of the aluminum template, the valve body is provided with a first water inlet/outlet and a second water inlet/outlet, and the first water inlet/outlet and the through hole are coaxially arranged and communicated; the clamping mechanism is installed in the valve body and comprises an elastic ring which is coaxial with the first water inlet and outlet, one end of the elastic ring abuts against the outer side of the aluminum template, and a pressing ring is arranged at the other end of the elastic ring. Sealing connection between the cooling water pipe and the valve body is achieved according to the extrusion expansion principle, compared with traditional threaded connection, the working efficiency can be ...

Method for removing thallium through pre-electrolysis of zinc electrolyte

The invention belongs to the technical field of non-ferrous metal hydrometallurgy, and particularly relates to a method for removing thallium through zinc electrolyte preelectrolysis. The method comprises the following steps: introducing a thallium-containing zinc sulfate electrolyte produced in a purification process into an electrolytic cell, inserting an inert anode and an inert cathode, adding manganese ions, and oxidizing divalent manganese ions around the anode to generate a manganese oxide cluster under the electrochemical oxidation effect after electrification. Then, all the electrolyte is directly pumped into a stirring tank under the condition that solid-liquid separation is not carried out, the electrolyte is subjected to an in-situ oxidation-adsorption reaction in the stirring tank, thallium is adsorbed in the structure of a manganese oxide cluster, the content of thallium in the solution can be reduced to 0.2 mg/L or below, and the influence of plate burning is not generated ...

Curing method of amorphous magnetic core

According to the curing method of the amorphous magnetic core, the amorphous magnetic core is a strip type amorphous magnetic core, the amorphous magnetic core is cured after being annealed, and the annealed magnetic core is subjected to parylene coating treatment in the curing process. The cured product is stable in performance after deformation and is not oxidized after being cured, and the method is environmentally friendly.

Lateral turning and lateral punching die for upper outer plate of trunk lid of vehicle covering part

The invention discloses a lateral turning and lateral punching die for an upper outer plate of a truck lid of a vehicle covering part. The lateral turning and lateral punching die comprises an upper die body and a lower die body. An air cylinder is connectedly mounted on one side of the upper die body. A lower-die wedge slider is connected to the piston rod end of the air cylinder, and reciprocates on the top face of the lower die body under the drive of the air cylinder. An upper-die wedge slider is mounted on the lower die body. A punching component and a lateral overturning block are sequentially mounted on the surface, opposite to the lower-die wedge slider, of the upper-die wedge slider from top to bottom. A lower insert matched with the lateral side of the lower-die wedge slider is arranged on the other sides of the punching component and the lateral overturning block. Through the structure of opposite wedges and the structural design of the punching component and the lateral overturning ...

Amorphous magnetism apron sealing device

The utility model provides an amorphous magnetism apron sealing device, includes the frame, is provided with elevating gear in the frame, the jar body of the cylinder of vertical direction is connected on elevating gear, the cylinder the jar pole down, be connected with the hot plate on the jar pole of cylinder, be connected with heat -sealing plate under the hot plate, heat -sealing plate on be provided with a plurality of blind holes that ranks distribute that are, be provided with the heat -seal frock in the frame of heat -sealing plate below, the heat -seal frock on be provided with the reference column that the blind hole on a plurality of and the heat -sealing plate corresponds from top to bottom, foraminiferous plastics protected the box in the middle of the cover was equipped withon the magnetic core, magnetic core upper portion covers has the apron, laps to be arranged in plastics and to protect the box. Can be with the reliable fixed position of the apron of minor diameter magnetic ...

Naked magnetic core sequencing mechanism

The utility model provides a naked magnetic core sequencing mechanism, includes the frame, has been equipped with the feed bin in the frame, is provided with the feed bin conveyer belt in the feed bin, and the feed bin conveyer belt is by feed bin motor drive, and the top of feed bin conveyer belt is provided with the many obstruction poles that highly reduce in proper order before the late arrival, have decurrent slope in terminal linking of feed bin conveyer belt, and there is the intermediate transport area terminal linking the on slope, and the intermediate transport area is by middle motor drive, and the intermediate transport portion of taking is provided with guider, guider be down the V -arrangement, on the limit at the rear portion of falling the V -arrangement is located the intermediate transport area, fall the top of V -arrangement for the sequencing import, the import department is provided with the sequencing conveyer belt in the sequencing, it is parallel with the sequencing ...

Intelligent marketing method and system for agricultural products

The invention provides an agricultural product intelligent marketing method and system, and relates to the technical field of data processing. The agricultural product intelligent marketing method comprises the steps of obtaining historical related data of a user; obtaining interestingness evaluation information of each user on each agricultural product according to a relation degree between the historical related data and preset data; obtaining a user purchase score matrix according to the interest degree evaluation information of each user on each agricultural product; and obtaining a recommended agricultural product list of the target user according to the user purchase score matrix, and performing agricultural product marketing on the target user according to list information of the recommended agricultural product list of the target user. According to the method, various effective information and data are fully utilized and introduced, the agricultural product recommendation effect ...

Organic electroluminescent display