1386 results about "Display cabinet" patented technology

Disclosed are systems and methods for tool activation and display cabinet locking. In one aspect, a method for activating a product is performed at the product. The product includes a power supply, a controller, a persistent memory coupled to the controller, and a radio module. The product is configured to be operable in a plurality of states, and a state of the product is in an inactivated state. The method includes receiving via the radio module an activation message and an authorization token. The method includes attempting to validate the authorization token based on a preset authorization information and the state of the product. The method includes, (i) when the validation is not successful, rejecting the activation message without changing the state of the product; and (ii) when the validation is successful, changing the state of the product from the inactivated state to an activated state.

Disclosed are systems and methods for tool activation and display cabinet locking. In one aspect, a method for activating a product is performed at the product. The product includes a power supply, a controller, a persistent memory coupled to the controller, and a radio module. The product is configured to be operable in a plurality of states, and a state of the product is in an inactivated state. The method includes receiving via the radio module an activation message and an authorization token. The method includes attempting to validate the authorization token based on a preset authorization information and the state of the product. The method includes, (i) when the validation is not successful, rejecting the activation message without changing the state of the product; and (ii) when the validation is successful, changing the state of the product from the inactivated state to an activated state.

A display system is provided comprising a display case, a clamshell assembly, and a stand assembly. The display system can be utilized to provide various means to securely showcase and store a collectible product, such as a collectible piece of eyewear, while reducing the need for the user to remove the collectible product from the display system or, alternatively, allowing the user to remove the product from the display system without comprising the value of the collectible product.

The utility model relates to the technical field of display cabinets, and provides a display cabinet with a heat preservation curtain, which comprises a cabinet body and a cabinet door arranged on one side of the cabinet body, an inner container is arranged in the cabinet body, and the heat preservation curtain is arranged on the upper portion of the inner container and attached to the inner side of the cabinet door. The heat preservation curtain comprises a driving wheel rotatably installed in the inner container, a curtain body wound on the driving wheel and a motor which is coaxial with the driving wheel and drives the driving wheel to rotate to wind and unwind the curtain body, and the heat preservation curtain can descend and shield the inner side of the cabinet door during power failure to preserve heat of articles in the display cabinet. And the melting rate of articles placed in the cabinet body is slowed down.

The invention relates to the technical field of intelligent control of refrigeration equipment, and discloses an intelligent energy-saving control method and system for a refrigeration display cabinet. The method comprises the following steps: acquiring temperature distribution and human traffic data in the refrigeration display cabinet through a multi-parameter sensor network, inputting the data into an ARIMA model after moving average filtering processing, and predicting a refrigeration load fluctuation trend; establishing a dynamic energy efficiency ratio indicator based on the ratio of the compressor power to the load prediction value, and quantifying the energy-saving effect; the compressor frequency and the fan rotating speed are adjusted by combining a nonlinear predictive control algorithm, and a cooperative control instruction is generated; and the influence of the instruction on the system load is analyzed through the refrigerant flow tendency function, the defrosting period is synchronously optimized, and an energy-saving control strategy is formed and executed. According to the invention, predictability and collaboration of energy efficiency management of the refrigeration display cabinet are improved.

The invention discloses a punch forming device for an aluminum alloy inner container of a digital display cabinet. The punch forming device comprises a base. Through cooperative arrangement of the material taking mechanism and the adjusting mechanism, the advantage of convenient receiving and feeding is achieved, the height during material receiving and taking can be adjusted so as to adapt to the height of an inner container, falling damage caused by separation from a mold from a high position is avoided, meanwhile, the material taking mechanism moves towards a conveying position after material receiving and taking in the mode that the moving position and direction can be adjusted, and the production efficiency is improved. The required direction can be adjusted in the displacement process, direction adjustment is conducted in a rotating mode till the inner container is placed on the conveying equipment, the material taking mechanism can receive the formed inner container, the distance between the bearing pieces can be adjusted according to needs, and therefore the conveying efficiency is improved. And the transverse centering of the materials is guaranteed in a side clamping mode when the materials are placed, and meanwhile the adjusting mechanism is mainly used for achieving position adjustment, height adjustment and direction adjustment work when the materials are received and taken and after the materials are taken.

Disclosed are systems and methods for tool activation and display cabinet locking. In one aspect, a method for activating a product is performed at the product. The product includes a power supply, a controller, a persistent memory coupled to the controller, and a radio module. The product is configured to be operable in a plurality of states, and a state of the product is in an inactivated state. The method includes receiving via the radio module an activation message and an authorization token. The method includes attempting to validate the authorization token based on a preset authorization information and the state of the product. The method includes, (i) when the validation is not successful, rejecting the activation message without changing the state of the product; and (ii) when the validation is successful, changing the state of the product from the inactivated state to an activated state.

Disclosed are a method and apparatus devices for an acrylic display case wherein the two panels (walls or ceiling or even floor) are adjoined using substantially wedge-shaped (trapezoidal) fittings capable of easily snapping into slot cut-outs / notches in the acrylic panel walls (or ceiling or floor) before final screw-tightening. The wedge-shaped fittings are easily positioned (inserted by sliding-insertion, then push-snapped) into their receiving slots in their respective panel slots (before being screw-tightened from a screw coming from the perpendicular panel). The wedge-shaped fitting promotes “one direction insertion” and then ‘snaps into place’ in its panel slot due to the fitting's “substantially three layer (3-structure)” style shape. Each fitting has an inner (anchors inside the box) face section with a surface area slightly larger than its panel notch. This inner section is ultimately positioned inside the case, acting as an inner anchoring lip against the acrylic panel's inside wall (wall herein interchangeable with “panel, whether ceiling or side or floor). The fitting further comprises a tapered middle section that allows for easy sliding-insertion into the panel notch-slot, and then allows gentle pressing / pushing into place (until friction gives to the “snap” positioning). This seamless positioning is made possible due to the fitting's middle-section tapering. After insertion (smaller end of the wedge fitting is initially inserted into the wider end of the dovetail shaped slot), as the fitting is then pressed into its slot, the tapered middle structure is what allows the fitting to gently slide against the panel notch's edge until the fitting “snaps” into place when this friction is overcome. The fitting further comprises an outer face section which is substantially larger than its panel-slot. This fitting “outer face section” has the largest surface area of the fitting's three sections. Both the innermost and outermost “layers / structures” of the fitting function as “lip-rim anchors” to keep the fitting firmly in its panel-slot, while the trapezoidal “wedge shape” of the fitting allows efficient insertion and ultimately secure snap-placement.The remainder of the system comprises modular panels with optional cut-out slots, tabs, indentations and screw holes to build a wide variety of display cases.

The utility model belongs to white spirit selling, and particularly relates to a display cabinet for white spirit selling, which comprises a supporting table, and a glass plate is fixedly connected to the top of the supporting table. The top of the glass plate is fixedly connected with a top plate; the bottom of the glass plate is fixedly connected with a motor; the output end of the motor is fixedly connected with a fixed table; a sliding groove is formed in the fixing table. A clamping rod is slidably connected into the sliding groove. According to the technical scheme, clamping rods are opened towards the two sides to extrude first springs to generate elastic force, the first springs extrude the outer wall of white spirit for clamping and fixing, then a motor is started to drive a fixing table to rotate, the fixing table drives the white spirit to be rotationally displayed, and therefore a user who purchases the white spirit can conveniently observe in all directions; and along with accelerated rotation of the motor, hops can be generated in the white spirit when the white spirit rotates at a high speed, so that professional users can observe the quality of the white spirit conveniently, and the selling quantity of the white spirit is increased.

Display units with vandalism deterrence are disclosed, along with related systems and methods. A display unit includes electronic display(s), shock sensor(s), and a controller which receives data from the shock sensor(s). Where the controller determines that the data received from the shock sensor(s) is outside of one or more predetermined parameters, the controller initiates a vandalism detected signal, which may electronically and automatically cause changes to ongoing operations of some or all of the one or more electronic displays.

The invention relates to the technical field of cultural relic exhibition and protection, in particular to a dynamic cultural relic display cabinet based on a mixed reality technology. The display cabinet comprises a cabinet body assembly used for forming a closed cabinet body and placing and displaying exhibition articles, a light assembly used for illumination and illumination adjustment in the cabinet body assembly, a virtual projection assembly used for dynamic observation and display of the exhibition articles in the closed cabinet body, and a monitoring sensing assembly used for monitoring environment data in the cabinet body assembly and controlling the closed environment state. And the networking control assembly is used for uniformly managing all the cabinet body assemblies and accessories thereof in the area. A closed and controllable environment is formed through facilities such as a transparent protective cover, a thermostat and a dryer, cultural relics are effectively prevented from being damaged by environmental factors such as temperature and humidity and dust, the safety of the cultural relics is guaranteed, dynamic three-dimensional display of the cultural relics is achieved through a mixed reality mirror, a projector and a holographic projection cover, immersive and interactive exhibition experience is brought to audiences, and the intellectualization of the cultural relics is achieved. And the exhibition attraction is improved.

The application relates to an intelligent visual detection technology, in particular to a display cabinet capable of being intelligently and sensitively started and a display method thereof, which comprises a display cabinet body, a bearing bracket arranged in the display cabinet body, a plurality of groups of support structures arranged along the length direction of the bearing bracket, a deflection plate rotatably arranged on the support structure, a plurality of groups of guide grooves arranged on the bearing bracket, a plurality of groups of roller sets connected with the support structures and the deflection plate and capable of rolling in the guide grooves, and an interlaced arrangement between two adjacent groups of the guide grooves. When the roller sets move to the end of the guide grooves, the deflection plate can be upwardly deflected. A jacking assembly is arranged on the bearing bracket, a switching groove matched with the guide groove is arranged on the jacking assembly, the switching groove is used for guiding the roller sets in the corresponding guide grooves, an intelligent visual detection control module is arranged in the display cabinet body, the light source intensity in the display cabinet body is adjusted, the display space is optimized, and energy consumption is saved.

The invention belongs to the technical field of adaptive energy-saving control, and particularly relates to a display cabinet adaptive energy-saving control method based on distributed control, and the method comprises the steps: building a communication module and a display cabinet, and obtaining the average energy consumption of the display cabinet in a region; building a data acquisition system inside and outside the display cabinet; designing a double-closed-loop energy-saving logic; display cabinet distributed control is built, and a dynamic adjustment task of local control node interaction data is obtained based on the real-time energy consumption of the display cabinet, the commodity heat-temperature coefficient and the current internal temperature of the display cabinet; acquiring equipment operation signal feature data in the data storage library, and establishing a fault prediction model; and based on the data on the cloud management node, predicting a use peak value by using the fault prediction model, and adjusting an operation strategy of the display cabinet. According to the invention, through combination of double-closed-loop energy-saving logic and regional average energy consumption calculation and energy-saving potential value sorting, accurate energy-saving regulation and control can be realized, energy configuration can be optimized, and operation cost can be reduced.

Disclosed is a show case capable of managing and displaying objects stored therein. A show case according to one aspect of the present disclosure is a show case having an accommodation space in which an object is stored, and includes: a body; a moving body configured to form the accommodation space together with the body and including a transparent window; a blowing part configured to circulate air in the accommodation space; a first illumination configured to illuminate an object placed on a bottom surface of the accommodation space; a second illumination configured to illuminate a rear surface of the accommodation space; an input part to which an image of the object accommodated in the accommodation space is input; and a controller configured to recommend a type of second illumination to a user depending on the image input to the input part.

The invention belongs to the technical field of power distribution cabinets, and particularly relates to an intelligent power distribution information display cabinet which comprises a cabinet body, a transformer joist, a micro circuit breaker mounting plate, a main switch mounting plate, an inner door plate, an outer door plate and an information display screen. The top of the cabinet body is provided with a cooling fan. The bottom of the cabinet body is provided with an air inlet dustproof component. The upper end of the air-inlet dustproof component is connected with a heat-dissipation air After the heat dissipation fan at the top of the cabinet body is started, cold air outside the cabinet body enters the heat dissipation air duct from the air inlet dustproof component at the bottom of the cabinet body, and then enters the three areas through the air outlets; the controller uses the difference value between the temperature data transmitted by the temperature sensors arranged in the three areas and the preset temperature as the basis for the controller to control the opening size of the air outlet of the air outlet adjusting unit, so that the cold air is distributed to each area more reasonably; therefore, the electric appliances in each area in the cabinet body can be cooled more reasonably, and the safety of the electric appliances in the intelligent power distribution cabinet body is improved.

The invention discloses a multifunctional pet display cabinet with an adjustable structure, which is characterized in that an upper display cabinet is fixed above a lifting seat, a groove is formed in the bottom of the lifting seat, a bottom plate is fixed below the lifting seat, a mounting cavity is formed between the bottom plate and the groove, and a winding roller is rotatably mounted in the mounting cavity through a bearing; an unlocking structure is installed on the winding roller in a front-back sliding mode, a lifting rope is fixed to the top of each rope penetrating groove of the four stand columns, the lifting ropes stretch into the mounting cavity and are connected with the winding roller, and locking plates are installed on the left side and the right side in the mounting cavity in a left-right sliding mode respectively; limiting blocks are installed at the four corners of the interior of the installation cavity in a front-back sliding mode respectively, the lifting base is installed among the four stand columns of the cabinet body in an up-down sliding mode, the upper showcase is installed above the lifting base, a winding roller and four lifting ropes are arranged in a matched mode, and the height of the lifting base and the height of the upper showcase can be directly changed by rotating the winding roller; the height of the upper showcase can be quickly adjusted according to needs.

The application discloses a kind of digital display cabinet aluminum alloy inner container punch forming device, including base;The application is cooperatively arranged by material taking mechanism and adjusting mechanism, which realizes the advantages of convenient access and feeding.Adjustable height is used when material is taken, so as to adapt to the height of the inner container, and to avoid falling damage caused by separating from the mold from a high place.Movable position and direction can be adjusted after material is taken, and the required direction can be adjusted during displacement.The direction is adjusted by rotating until the inner container is placed on the conveying equipment.The material taking mechanism can not only complete the taking operation of the formed inner container, but also adjust the spacing of the carrier according to the needs, and the lateral clamping method is used to ensure the lateral centering of the material during placement.The adjusting mechanism is mainly used for position adjustment, height adjustment and direction adjustment during material taking and after material taking.

Provided is a board for an acrylic stand that reduces the trouble and cost of obtaining a showcase. 【Solution means】 A board 1 for an acrylic stand, which is cut out from a single rectangular plate-shaped acrylic resin material by laser cutting and has a plurality of printed parts that can be fitted back into the cut-out holes in a detachable manner. The plurality of parts include at least one object part 11, 12 and six box parts for assembling a six-sided display box capable of storing the object part. The six box parts are composed of a rectangular front part 21, a rear part 22, a left side part 23, a right side part 24 for forming a quadrangular prism wall with a trapezoidal horizontal cross-section and a shorter front width than the rear width, and a top part 25 and a bottom part 26 that close the top and bottom of the quadrangular prism wall.

The application relates to the technical field of intelligent control of refrigeration equipment, and discloses an intelligent energy-saving control method and system for a refrigeration display cabinet. The method comprises the following steps: collecting temperature distribution and passenger flow data in the refrigeration display cabinet through a multi-parameter sensor network, inputting the data into an ARIMA model after sliding average filtering processing, and predicting a refrigeration load fluctuation trend; a dynamic energy efficiency ratio indicator is established based on the ratio of compressor power to the predicted value of the load, and the energy-saving effect is quantified; the compressor frequency and the fan rotating speed are adjusted in combination with a nonlinear prediction control algorithm, and a cooperative control instruction is generated; the influence of the instruction on the system load is analyzed through a refrigerant flow tendency function, the defrosting cycle is optimized synchronously, an energy-saving control strategy is formed, and the strategy is executed. The application improves the predictability and cooperativeness of energy efficiency management of the refrigeration display cabinet.

Disclosed are systems and methods for tool activation and display cabinet locking. In one aspect, a method for activating a product is performed at the product. The product includes a controller, a persistent memory coupled to the controller, and a radio module. The product is configured to be operable in a plurality of states, and a state of the product is in an inactivated state. The method includes receiving via the radio module an activation message and an authorization token. The method includes attempting to validate the authorization token based on a preset authorization information and the state of the product. The method includes, (i) when the validation is not successful, rejecting the activation message without changing the state of the product; and (ii) when the validation is successful, changing the state of the product from the inactivated state to an activated state.

The utility model relates to the technical field of digital showcases, in particular to a modular splicing type digital showcase. The utility model provides a modular splicing type digital showcase. The modular splicing type digital showcase comprises a base, an acrylic box, a holographic projector, a splicing bottom cabinet, a splicing sub-cabinet, a plug-in assembly, a fastening assembly, an interlayer assembly and a separation assembly. When the modular splicing type digital showcase is spliced and assembled, firstly, the splicing sub-cabinets and the splicing bottom cabinet can be spliced and fixed through the splicing assemblies, then the splicing sub-cabinets and the splicing bottom cabinet can be fastened and installed through the fastening assemblies, then the separation assemblies and the interlayer assemblies are clamped and fixed in the splicing sub-cabinets, and in addition, the splicing sub-cabinets and the splicing bottom cabinet can be spliced and assembled. The multiple groups of spliced sub-cabinets are assembled through the splicing process, the internal spaces of the spliced sub-cabinets can be separated and divided through the separation assemblies and the interlayer assemblies, different exhibits can be displayed at the same time, in addition, the flexibility and variability of the display cabinet are improved, and diversified display requirements are met.

The application discloses a display cabinet with self-adaptive adjusting air duct, which comprises a cabinet body, an air adjusting assembly and a monitoring box, the air adjusting assembly comprises a lower layer plate and an air duct plate, the air duct plate is provided with variable air ducts and a plurality of fixed air ducts, each separated variable air duct is rotationally connected with an adjustable fan blade, two temperature controllers are installed at the lower end of the rear wall of the monitoring box, two sensors are arranged on the inner wall of the first rear back plate located at the bottom of the air adjusting assembly and the rear side thereof; the variable air ducts and the adjustable fan blades are arranged to sense the temperature changes at different positions in the cabinet body, the adjustable fan blades are driven to rotate by the rotation of the stepping motor, the direction of the air duct is adjusted, the cold air in the cabinet body is uniformly circulated, the temperature at each position in the cabinet body is kept consistent at all times, the temperature controllers are arranged to detect the temperature more accurately, the power consumption of the display cabinet is reduced, and the controller is communicated with the cloud platform to realize the temperature detection of the cabinet body and timely feedback the operation state of the air duct.

The invention relates to an intelligent visual inspection technology, in particular to an intelligent induction starting display container and a display method thereof, the display container comprises a display cabinet body, and a bearing frame is arranged in the display cabinet body; the multiple sets of supporting structures are arranged in the length direction of the bearing frame, and deflection plates are rotationally installed on the supporting structures; the multiple sets of guide grooves are formed in the bearing frame and connected with the supporting structure, roller sets of the deflection plate can roll in the guide grooves, and every two adjacent sets of guide grooves are staggered; when the roller group moves to the end part of the guide groove, the deflection plate can deflect upwards; the jacking assembly is arranged on the bearing frame, switching grooves matched with the guide grooves are formed in the jacking assembly, and the switching grooves are used for guiding the same roller set to roll in the corresponding guide grooves; the intelligent visual detection control module is arranged in the display cabinet body and used for adjusting the light source intensity in the display cabinet body, optimizing the display space and saving energy consumption.

Sensor system (10) for air conditioning at least one display case (V) by means of at least one controlled circulation system (10; 10') for a gas mixture (L) located in the interior of the display case (V), in particular in a display case element (SK) of the display case (V), wherein the respective circulation system (10) has at least the following components: a filter device (12) with a humidity-regulating agent, and a circulation drive (P), wherein the components (12; P) are connected together with the interior of the display case (V) by means of gas-tight connecting elements to form at least one circuit (KL) in which the gas mixture (L) circulates in order to stabilize the humidity of the gas mixture (L) by means of the filter device (12) and to filter out impurities from the gas mixture (L); wherein the sensor system (11) comprises a plurality of sensors and is connected to a control device (13) for controlling the circulation system (10), in particular the circulation drive (P), in order to measure parameters to be controlled or monitored for the control device (13); characterized in that at least two sensors (111, 112) are integrated in the sensor system (11), which sensors are arranged at the same location on or in the interior of the display case (V) and record parameters relating to at least the humidity and the contamination of the gas mixture (L) as input signals for the control device (13) in order to control the circulation drive (P) depending on the recorded parameters.

The utility model discloses a real estate building model display device, which comprises a display cabinet and a display board, the inner side wall of the display cabinet is rotatably connected with two rotating rods, one end of each rotating rod far away from the inner side wall of the display cabinet is fixedly connected with a gear, and the inner bottom wall of the display cabinet is fixedly connected with a heightening block. The lower end of the display board is fixedly connected with two racks, the racks are meshed with the gear, and the rotating rod is fixedly connected with a second belt pulley. Through the movement of the display board, the rack drives the gear to rotate, then the second belt pulley drives the first belt pulley to rotate through the belt, the rotation of the screw rod drives the sliding block to move, and the effect of opening or closing the dustproof plate is achieved; the opening or closing of the dustproof plate is related to the ascending or descending of the display plate, so that the display plate and the dustproof plate can move synchronously, collision is prevented, and the situation of display failure is avoided.

The utility model discloses a showcase convenient to install, which comprises a bottom plate, the top of the bottom plate is fixedly connected with a rectangular fence, the left side of the top of the bottom plate is rotatably connected with a left baffle, the right side of the top of the bottom plate is fixedly connected with a second support plate, and the top of the second support plate is rotatably connected with a right baffle. The side wall of the left baffle and the side wall of the right baffle are each provided with two sliding grooves, partition plates are slidably connected into the two sliding grooves in the side wall of the left baffle, one ends of the two partition plates are slidably connected into the two sliding grooves in the side wall of the right baffle correspondingly, and a first supporting plate is fixedly connected to the rear side of the top of the bottom plate. The top of the first supporting plate is rotationally connected with a rear baffle. Through mutual cooperation of the handle, the rectangular fence, the partition plates, the limiting rods and other components, the showcase can be rapidly installed, folded and stored, the occupied space of the showcase is reduced, and therefore the showcase can be conveniently transported, and operation is easy, convenient and rapid.

The utility model relates to a noctilucent algae feeding and breeding display cabinet which comprises a cabinet frame and a display cylinder, the cabinet frame is cubic, and the display cylinder is located in the middle of the cabinet frame. The top surface of the display cylinder is open, an illuminating lamp and a liquid dropping device are fixedly arranged at the top of the cabinet frame, the liquid dropping device comprises a liquid storage box, a pump machine and a liquid dropping head, a liquid dropping opening of the liquid dropping head corresponds to the open surface of the top of the display cylinder, the liquid dropping head is connected with a liquid outlet of the pump machine through a pipeline, and a liquid inlet of the pump machine is connected into the liquid storage box through a pipeline. An existing water body stirring scheme is replaced with a liquid dropping stimulation mode, so that the stimulation force is easy to control, local continuous light emission of the noctilucent algae can be maintained, the continuous ornamental effect is achieved, long-time waiting is not needed, and the ornamental effect is good. In addition, by matching with an illuminating lamp, breeding and breeding operation of the noctilucent algae is facilitated, that is, the display cylinder can be used as a culture cylinder at the same time.

The utility model belongs to the technical field of display cabinets, and discloses a cabinet door anti-collision display cabinet which comprises a display cabinet body and a glass door installed on the front face of the display cabinet body, and the upper end and the lower end of one side of the display cabinet body are rotationally connected with one side of the glass door through hinges. The glass door can rotate by 90 degrees relative to the front face of the display cabinet body through the hinge and then is opened, and the vertical face where the opened glass door is located does not intersect with the display cabinet body. One end of each hinge is slidably connected with the glass door, so that the opened glass door can be slidably arranged on one side of the display cabinet body. The glass door is located on the side face of the display cabinet body after being not opened completely, the opening degree of the front face of the display cabinet body can be maximized, articles can be taken and placed more conveniently, and the glass door is not prone to being damaged by collision.

The utility model relates to the field of display cabinets, and discloses an open air curtain display cabinet with a good refrigeration effect. The air curtain machine is arranged in the upper cabinet body and is used for blowing cold air to a cabinet opening of the upper cabinet body and forming a barrier so as to isolate external hot air; the top plate is mounted in the upper cabinet body; the protection mechanism is installed on the top plate and used for shielding the open area of the upper cabinet body when the display cabinet is not used. According to the air curtain display cabinet, the intelligent control protection mechanism is introduced, the air curtain display cabinet automatically closes the open area when no person approaches, the open area needing to be maintained by an air curtain system and a refrigerating system is reduced, energy consumption is remarkably reduced, the shielding curtain can effectively isolate external hot air, and the energy-saving effect is achieved; the intelligent combination of the inductor and the driving mechanism realizes the automatic on-off control of the protection mechanism, does not need manual intervention, and is convenient and efficient.