68results about How to "Simplified quantity" patented technology

The invention relates to the technical field of dolls, and provides a head bionic motion structure of a bionic animal doll, the head bionic motion structure comprises a head shell, ear components, a mouth component and eye components, the head shell is provided with windows for displaying the ear components, the mouth component and the eye components, and the head bionic motion structure is arranged in the head shell. The head bionic motion structure comprises a shell, a first plane and a second plane are symmetrically arranged on the outer surface of the shell, a driving assembly is arranged in the shell, and a first transmission assembly and a second transmission assembly are arranged on at least one face of the first plane and / or the second plane; the first transmission component is flattened and is used for driving the ear component and the mouth component to move, and the second transmission component is used for driving the eye component to move; and the driving assembly is used for driving the first transmission assembly and / or the second transmission assembly to move. According to the bionic structure, the integration and miniaturization of the bionic structure are improved, and the space occupation volume is greatly saved.

The utility model relates to the technical field of nitriding furnaces, in particular to an inlet air cooling device of an ultra-deep well type nitriding furnace, which comprises a fan connected to the nitriding furnace and used for cooling inlet air, a butterfly valve for adjusting the inlet air rate is additionally arranged on the fan, and the pipeline joints of the butterfly valve, the nitriding furnace and the fan are all arranged to be of flange structures. A plurality of arc-shaped rings which can stretch out and draw back in the arc direction are installed on the connecting face through bolts, the arc-shaped rings form a closed ring body structure after being stretched, and the outer portion of the ring body structure is sleeved with a sealing ring used for sealing and isolation. The number of parts required for assembly is reduced, and meanwhile, a stable supporting effect on the sealing ring is achieved, so that all joint surfaces of the nitriding furnace are tighter, and air cooling is smooth and free of leakage; by additionally arranging the rotatable L-shaped limiting plate, additional locking and supporting effects are provided for the joint face, and the sealing performance of the flange joint is enhanced.

The utility model provides an automobile combination switch structure which comprises a base, a gear handle assembly is connected to the base, a handle rod is arranged at one end of the gear handle assembly, a first magnet is fixedly arranged on the handle rod, a circuit board assembly is arranged at the position, located above the handle rod, in the base, and a second magnet is fixedly arranged on the circuit board assembly. And a group of first Hall sensors are arranged on the circuit board assembly corresponding to the position above the first magnet. The utility model aims to provide an automobile combination switch structure, and solves the problems that an existing automobile combination switch assembly with a Hall sensor is complex in structure and large in occupied internal space size of a product, and the number of parts is large.

The invention discloses an X-ray beam limiting device and an X-ray imaging system.The X-ray beam limiting device comprises a shell, a first motor, a second motor, a first ray shielding assembly, a second ray shielding assembly and a ray shielding sleeve, and the first ray shielding assembly, the second ray shielding assembly and the ray shielding sleeve are sequentially arranged in the X-ray emitting direction; the first ray shielding assembly and the second ray shielding assembly can adjust an irradiation field under the action of the first motor and the second motor, and the ray shielding sleeve can block X-ray scattering; the X-ray beam limiting device can prevent the edge of an irradiation field from being blurred, and can also prevent scattered X-rays from influencing other areas of a human body except for irradiation; and doctors and nurses in close-range operation can be effectively protected.

The utility model discloses a kind of food crushers, including body, crushing bin and inlet-outlet structure, further include: turntable, set in crushing bin;Knife groove, the inside of the turntable is formed with knife groove and penetrates;Knife disc, by joint structure installation in knife groove.In the present application, first, double-end joint structure of axial and circumferential limit is used between knife disc and bracket, and unlocking is completed by exposed handle, without any auxiliary tool, knife disc replacement or cleaning can be completed, to reach the purpose of convenient cleaning, second, oval knife disc with its long axis periodicity sweeps feed inlet, forms shear and shielding alternation, to improve crushing efficiency and fluency, finally, lock point is hidden in the narrowest tail end of knife disc and extends to center opposite side, make joint structure completely avoid shear area, while completing axial close and circumferential positioning when knife disc is pushed into shaft sleeve, both can realize the full use of crushing space, and can simplify the number of parts and assembly step.

The invention relates to the technical field of hydrogen storage devices, in particular to a hydrogen storage tank with a stirring function and a hydrogen storage device. The two gas guide pipes are used in the hydrogen storage tank, and overall stirring of hydrogen storage alloy particles is achieved. Through threaded connection between the threaded rod and the fixed partition plate, the hydrogen storage alloy particles in the threaded rod are stirred up and down by the gas guide pipe and the stirring blade, and stirring plates do not need to be mounted on different layers, so that the space can be saved, the design of the hydrogen storage tank is more compact, and the complexity of the internal structure is reduced; meanwhile, maintenance and replacement are easier, the number of stirring plates needing to be maintained is reduced, and the maintenance cost and complexity are reduced. And through cooperative use of a driving bevel gear and a driven bevel gear, a gas guide pipe and a stirring blade rotate and stir while moving up and down along with a threaded rod, so that the stirring effect is further improved, the hydrogen can fully react with the hydrogen storage alloy particles, and the storage amount of the hydrogen is increased.

This utility model provides a cleaning device, including: a body, a lifting mechanism, a cleaning mechanism, and a shielding component; the lifting mechanism is connected to the body; the cleaning mechanism is connected to the lifting mechanism and moves up and down relative to the body under the drive of the lifting mechanism; the cleaning mechanism includes a cleaning component; the shielding component is rotatably mounted on the cleaning mechanism and partially shields the outer periphery of the cleaning component, the shielding component having a first rotational position that isolates the cleaning component from the surface to be cleaned, and a second rotational position that allows the cleaning component to contact the surface to be cleaned; wherein, the lifting mechanism includes a driving component and a transmission mechanism, the transmission mechanism including a power input end and two power output ends, the driving component drives the two power output ends to move through the power input end, one of the two power output ends drives the cleaning mechanism to move up and down, and the other of the two power output ends drives the shielding component to rotate. This utility model can improve the problem of cleaning equipment easily causing carpet contamination during cleaning operations.

The application relates to the field of piezoelectric pumps, in particular to a micro-nano piezoelectric air pump with air inlet and outlet on the same surface, which comprises a rack mechanism, an oil tank, an engine, a battery assembly and a silencer which are sequentially installed on a rack body, a moving piece located outside the rack body, a shell piece arranged outside the oil tank, a control piece arranged on the top of the shell piece and a tool box installed on one side of the shell piece. The piezoelectric ceramic prepared by adopting the micro-nano process is combined with the laser welding assembly mode instead of the adhesive assembly mode, so that the reliability risk of the aging of the adhesive layer and the decrease of the bonding force in the high-temperature, high-humidity and low-temperature environment is avoided, the air tightness and long-term consistency between the layers are ensured, and the durability of the product under the harsh working conditions such as vibration and mechanical impact is remarkably improved. Thirdly, the air inlet, the air outlet and the air exhaust are completed on the same structure surface, the flow path layout and the number of parts are simplified, and the assembly complexity and the cost are reduced.

The application provides a support and electronic equipment protective shell, the support comprises a support body, a pressurized nozzle, a sealing ring, a fixing part and a compression nut, a containing cavity for containing liquid is formed in the support body, and the support body is provided with a mounting hole in communication with the containing cavity; the pressurized nozzle comprises a nozzle body and a straw extending from the nozzle body, the pressurized nozzle is detachably arranged in the mounting hole, and the straw extends into the containing cavity through the mounting hole; the sealing ring is arranged at the periphery of the mounting hole; the fixing part is fixedly connected to the support body; the compression nut is threadedly connected with the fixing part, and the compression nut applies a compression force to the nozzle body in the direction of the sealing ring, so that the nozzle body is pressed against the sealing ring, the sealing of the mounting hole and the fixation of the pressurized nozzle are realized. The support of the application cooperatively completes the two functions of sealing and fixation in the same threaded assembly action, simplifies the number of parts and the assembly process, and improves the reliability of the sealing.

This application relates to a load power failure protection system, comprising: a circuit (110) having a power receiving port (110) and a plurality of load ports (120, 130, 140); one or more sensors (A) disposed on the circuit for detecting real-time values ​​related to electrical parameters at each load port; a controller (200) associated with the one or more sensors to receive the real-time values ​​measured by each sensor and to generate a cut-off signal when the real-time values ​​meet preset conditions; and one or more switches (C) associated with the controller and switching to a cut-off state in response to the cut-off signal to cut off the power supply to the associated load ports, wherein the associated load port of each switch is one or more of the plurality of load ports, and each load port is the associated load port of at least one of the one or more switches. This application also relates to a power distribution unit including this system.

This invention belongs to the field of sensor technology, specifically relating to an eddy current sensor system, including a signal conditioning circuit, a coaxial cable, and a probe-end circuit. The signal conditioning circuit includes a power amplification module for superimposing a DC bias voltage with an AC excitation signal to generate a mixed signal, which is then transmitted to the probe-end circuit via the coaxial cable. The probe-end circuit includes a series capacitor, a filter circuit, and a follower. The series capacitor couples an AC excitation signal from the mixed signal to drive the probe coil. The filter circuit extracts a DC bias voltage from the mixed signal to power the follower. The follower receives the impedance change signal of the probe coil and transmits it back to the signal conditioning circuit via the coaxial cable. This invention eliminates the influence of the distributed parameters of the coaxial cable on the probe characteristics. The length of the coaxial cable can be arbitrarily extended or shortened without re-matching and calibration. It also eliminates the output drift problem caused by bending of the coaxial cable and simplifies the system wiring complexity.

The present disclosure relates to a steering device and a vehicle, the steering device comprising a base body and a steering mechanism, the steering mechanism comprising a sliding seat and a steering wheel assembly rotatably connected to the sliding seat, the steering wheel assembly having a tracking piece, the sliding seat being slidably connected to the base body, wherein the base body has a first track, and the tracking piece is slidably connected to the first track to drive the steering wheel assembly to rotate relative to the sliding seat. The steering device and the vehicle of the present disclosure have a more compact structure, use fewer components, occupy less space, and can significantly improve the running stability and accuracy of the steering wheel assembly during trajectory change. In addition, the steering device can be adapted to vehicles with lower instrument panels, thereby greatly improving the utilization rate of the cockpit space and the user experience.

The utility model discloses a tail plug mobile power supply, which comprises a shell, an upper shell assembly is fixed at the top of the shell, the upper shell assembly comprises an accommodating groove and an elastic support arm arranged at the bottom of the accommodating groove, a turnover plug is rotatably connected in the accommodating groove, and the turnover plug is connected with the elastic support arm. The overturning plug is provided with a first clamping part, a second clamping part and an electric plugging end, when the electric plugging end is overturned to the outside of the accommodating groove, the first clamping part is connected with the elastic support arm in a clamping manner, and when the electric plugging end is overturned to the inside of the accommodating groove, the second clamping part is connected with the elastic support arm in a clamping manner. According to the utility model, the electric plugging end can be extended and hidden, and complicated hinges and limitation are not needed, so that the number of components is reduced, the product cost is reduced, and the electric connector is easy to manufacture and assemble.

The utility model relates to the technical field of handle opening, in particular to a vehicle door lock switch mounting structure, which is characterized by comprising a carrier, a switch body and a base, and the carrier is provided with a connecting part; the switch body is provided with a button triggering part; the base is provided with an installation groove, the switch body is located in the installation groove, one end of the button triggering part penetrates out of an opening of the installation groove, a suspension cavity is further formed in one side of the base, and the connecting part is located in the suspension cavity and fixedly connected with the base. According to the technical scheme, the installation structure which can be suitable for universal installation of multiple vehicle doors, the installation cost is reduced, and the structure is simplified and light is obtained, and the problems that a vehicle door lock switch is complex in installation and high in installation cost are solved.

The invention discloses an elevator micro-motion leveling detection device and method. The problems that an existing elevator micro-motion leveling detection device is large in number of parts and high in cost are solved. The device comprises a leveling sensor and a leveling mark component in a hoistway, the leveling sensor is integrated with a plurality of detection elements for achieving leveling area edge detection, leveling area judgment and micro-motion area judgment, and different electric signals are output when all the elements are shielded and not shielded; the flat layer marking part is provided with an upper micro-motion area, a non-micro-motion area and a lower micro-motion area in the vertical direction, shielding pieces matched with the micro-motion area judging element are arranged on the flat layer marking part, an upper groove and a lower groove which are different in vertical length are formed by the adjacent shielding pieces, and the flat layer marking part is further provided with an edge groove matched with the edge detecting element. Detection parts are simplified, the cost is reduced, the position of the lift car can be accurately recognized, reliable signals are provided for micro-motion leveling, door area edge detection can be achieved, the elevator running safety is improved, and the device is matched with an existing elevator control system.

The invention discloses a method and a device for preparing a Maniyle ring based on a Gigabit-Maniyle placement technology. The method comprises the following steps: preprocessing the Maniyle ring and a Gigabit ring; preparing expanded pellets, and spraying heat-sensitive hydrogel on the surfaces of the expanded pellets; the surface modifier is used for modifying the heat-sensitive hydrogel, so that the expanded globules are not adhered to the muscular layer at the bottom of the uterus; and assembling the Mangyule ring, the Gamstone ring and the small expansion ball to form an integrated structure. The invention provides a method and a device for preparing a Maniyle ring based on Gemnant-Memnant placement, which are characterized in that the Maniyle ring and a Gemnant ring are cut off and pretreated, an expansion ball with a heat-sensitive hydrogel coating is prepared and modified to enhance the anti-blocking property, and finally the Maniyle ring, the Gemnant ring and the expansion ball are assembled into an integrated structure. According to the invention, integration of a Munyle ring fixing mechanism and a Gignette ring fixing mechanism is realized, the operation preparation process is simplified, the stability of the intrauterine device is improved, and the risk and trauma during taking out of the intrauterine device are reduced.

The invention discloses a simple fixing and buckling device for a photovoltaic module. The simple fixing and buckling device comprises a fixing clamping block and a purline, the fixed clamping block comprises a main plate and a bent plate; each purline comprises a main body part and an extending wing plate vertically connected with the main body part, an inserting groove for the main plate to be inserted is formed in the extending wing plate, a notch is formed in the extending wing plate, the notch is bent downwards from the end away from the main body part to form an elastic piece extending to the inserting groove, and a slit is formed between the tail end of the elastic piece and the outer side wall of the main body part; when the mainboard is inserted into the bottom of the slot, the elastic piece is pressed to deflect downwards and interacts with the bottom of the mainboard to form a friction force self-locking structure so as to prevent the fixed clamping block from exiting upwards. The fixing buckle can be quickly, simply and conveniently installed without a tool, meanwhile, the fixing buckle has extremely high vibration resistance and loosening resistance, and long-term connection reliability under the high-load and multi-direction stress environment is ensured; the number of parts is simplified through structural innovation, and therefore cost is reduced.

This invention relates to the field of hybrid electric vehicle technology, and discloses a mode switching device and method for a hybrid electric vehicle transmission. An actuator motor is fixed to the upper part of the transmission housing; a shift fork shaft is horizontally positioned and meshes with the actuator motor, and the shift fork shaft can be slidably connected to the inner wall of the upper part of the transmission housing and the inner wall of the direct drive, electric drive, and hybrid mode switching mechanisms; the upper end of the shift fork is fixed to one side of the shift fork shaft; the middle parts of the engine output shaft and the middle parts of the motor output shaft are arranged vertically and rotatably housed within the transmission housing; the lower end of the shift fork is connected to the upper end of the direct drive, electric drive, and hybrid mode switching mechanisms, which can synchronously move left and right with the shift fork to spline and lock onto the motor output shaft or engine output shaft respectively; the mode switching device of this invention has a compact structure, a simple mode switching method, and high reliability, enabling smooth switching between different modes of the hybrid electric vehicle transmission.

An automatic detection device for a control cabinet relates to the technical field of PLC testing. In order to solve the technical problems that in the prior art, existing PLC testing work mainly depends on manual operation, efficiency is low, the error rate is high, consequently, testing cost is increased, the testing period is prolonged, and even the overall progress of a project is affected, the technical scheme provided by the invention is that the automatic detection mounting plate for the control cabinet comprises a testing PLC module and an automatic detection module, the test module provides a test algorithm; the analog quantity signal conversion module is used for converting the active analog quantity output signal into a passive analog quantity output signal; the digital quantity signal conversion module is used for converting the active digital quantity output signal into a passive digital quantity output signal; the analog signal introduction module is used for receiving an analog quantity input signal and sending the analog quantity input signal to the test PLC module; and the digital signal introduction module is used for receiving a digital quantity input signal and sending the digital quantity input signal to the test PLC module. The method is suitable for automatic detection of the PLC control cabinet.

The invention belongs to the field of high-precision metal part machining, and particularly relates to a high-precision metal part laser cutting mechanism which comprises a laser cutting head, the laser cutting head is fixedly connected with a lifting arm, the lifting arm is slidably connected to a moving part, the moving part is fixedly connected to a mounting base, and the mounting base is fixedly connected to the laser cutting head. The laser cutting head is located over the metal pipe, a turnover mechanism is arranged at the bottom end of the lifting arm and comprises a driving gear, the driving gear is fixedly connected to a rotating shaft, and the rotating shaft is rotationally connected with the front end of the mounting plate; through the structural design of the turnover mechanism, when the laser cutting head moves upwards along with the lifting arm, a driving gear can drive a rotating wheel to rotate, so that rotation is transmitted to a second gear through the rotating wheel, a metal pipe is automatically driven to turn over, an additional motor does not need to be arranged for rotating the metal pipe, and the working efficiency is improved. And the number of devices is reduced, and writing of related programs can be simplified.

The present invention provides a multi-institution collaborative monitoring and filtering method and system, the method comprising: obtaining a number of result data records corresponding to the weather from a meteorological forecasting agency to construct a first equivalent partition; obtaining a number of process data records corresponding to the weather from a data acquisition base station to construct a second equivalent partition; merging the second equivalent partitions of different data acquisition base stations into a data acquisition base station partition set, and obtaining a first correct decision value in combination with the first equivalent partition; judging the data acquisition base station as an important base station or an initial redundant base station based on the first correct decision value, and merging the important base stations into an important base station set; obtaining a third correct decision value of the important base station set to determine whether the decision-making ability of the important base station set meets the requirements, and then completing the screening and elimination of the final redundant base stations. Based on the above method, the number of data acquisition base stations is streamlined and the accuracy and efficiency of the prediction are improved while ensuring the stability of the decision-making ability.

The present application relates to the technical field of air spring, in particular to a lightweight outer cover for air spring auxiliary spring, the lightweight outer cover comprises an integrated reinforcing framework and a cladding body, the reinforcing framework is a metal structural framework, comprising a metal partition plate and an upper support body, the cladding body is a composite cladding body, and the cladding body is integrally formed on the surface of the reinforcing framework by injection molding or casting, the lightweight outer cover of the present application can realize green low-carbon recycling while ensuring lightweight, can reduce the number of connected parts, reduce safety hazards, reduce costs, and can flexibly configure a material composite system according to actual stress working conditions, has high design freedom and high processing and preparation efficiency.

An electrical connection structure is disclosed, relating to the field of automotive brake-by-wire technology, to address the problems of complex structure, cumbersome assembly, and poor vibration resistance in existing technologies. The electrical connection structure includes mounting components, a wiring harness, a locking claw, a positioning shaft, and a compression spring. Two mounting components are provided, distributed opposite each other along a first direction. Each mounting component has a wire-locking groove on one side wall perpendicular to the first direction, with the grooves on the two mounting components respectively positioned opposite each other along the first direction and in the opposite direction. The wiring harness has terminals at both ends, which are press-fitted into the two locking grooves on the two mounting components. The length of the wiring harness is greater than the distance between the two locking grooves. A locking claw is fixedly mounted on one mounting component, extending beyond the mounting component along the first direction. A corresponding locking groove is provided on the other mounting component, with the locking claw extending into the locking groove to engage the two mounting components. The locking groove has an excess portion.

The application provides a method and system for generating forward simulation data, the method comprising: constructing a three-dimensional voxel model corresponding to a simulation scene, dividing a binning region according to the numerical characteristics of electromagnetic parameters corresponding to each voxel contained in the three-dimensional voxel model, and the binning region describing the value range of the numerical characteristics of the electromagnetic parameters; mapping and converting the electromagnetic parameters with different numerical characteristics corresponding to multiple voxels in one binning region into electromagnetic parameters with the same numerical characteristics; determining a target connected domain in the three-dimensional voxel model, wherein the voxels contained in the target connected domain correspond to electromagnetic parameters with the same numerical characteristics and the voxels are connected in space in the three-dimensional voxel model; selecting a local region of interest from the three-dimensional voxel model, generating geometric commands corresponding to the target connected domain included in the local region of interest; and executing the geometric commands to generate forward simulation data. The technical problem of excessive number of geometric commands and low efficiency of simulation data generation is solved.

The application discloses a relay, comprising a sealed shell, a plurality of contact assemblies and an isolation seat. The contact assembly comprises a moving contact and two static contacts, the static contacts are arranged on the sealed shell, and the moving contact is movably arranged in the sealed shell and used for contacting or separating from the two static contacts. The isolation seat is arranged in the sealed shell and comprises a first isolation structure, and the first isolation structure is arranged between adjacent contact assemblies.

This application relates to a battery device and an electrical device, and pertains to the field of battery technology. The battery device is installed in the electrical device and supplies power to it. The battery device includes a battery cell pack and a housing. The battery cell pack includes multiple battery cells. The housing has a receiving cavity in which the battery cell pack is disposed; the housing includes a housing body and a mounting portion, the mounting portion including a first bracket and a second bracket, the first bracket being connected to the housing body, the second bracket being provided with a mounting connector, the second bracket being detachably connected to the first bracket, and the mounting connector being configured to connect to the electrical device; the mounting connector is cylindrical, and the first and second brackets are arranged along a first direction, which is perpendicular to the axial direction of the mounting connector. This application improves the structure of the mounting portion to enhance the battery device's adaptability to different electrical devices, while simultaneously optimizing the structural strength of the mounting portion.

The utility model discloses a miniature electromagnetic valve which comprises a coil assembly and a valve body which are mutually fixed, and the coil assembly comprises a movable iron core. A valve port piece, a double-face plug, a plug support and a fixing piece are arranged in the valve body. A valve port communicated with the air inlet is formed in the opposite bottom of the valve port piece; the upper end face of the double-face plug corresponds to the valve port, and the lower end face corresponds to the exhaust port. The plug support is connected with the double-face plug, the top end of the plug support is provided with a push rod movably penetrating through the valve port piece, the push rod abuts against the lower end face of the movable iron core, and the movement of the movable iron core corresponds to the movement of the double-face plug. The fixing piece abuts against the side face of the valve port piece and is used for radial limiting of the valve port piece. According to the electromagnetic valve, the fixing piece is arranged to support the valve port piece, the valve port piece is limited in the radial direction, and the problems that internal parts of the electromagnetic valve fall off, displace and are not easy to assemble are solved on the premise that the appearance size is not increased and the internal structure is not changed greatly.

The utility model discloses a seat adjuster which is used for being installed on an automobile seat and comprises a sliding guide groove used for being connected with a backrest of the seat, a sliding plate is connected in the sliding guide groove in a sliding mode, and the sliding plate can slide in the sliding guide groove in the extending direction of the sliding guide groove. A lock catch is installed on the sliding plate and used for being connected with a seat of a seat. A bolt is slidably connected to the sliding plate, and a plurality of clamping grooves are formed in the side wall of one side, in the sliding direction, of the sliding guide groove; in the clamping state, the plug pin can extend into the clamping groove to be clamped with the clamping groove, and when the plug pin is clamped with the clamping groove, the sliding plate cannot slide along the guide groove; the sliding plate is further provided with a traction assembly, in the adjusting state, the traction assembly can pull the plug pin out of the clamping groove, at the moment, the sliding plate can slide relative to the sliding guide groove, and the relative position adjustment of the seat and the backrest is achieved. According to the utility model, the number of parts is reduced, the assembly time and the total part cost are reduced, and the weight of seat accessories is reduced.

This invention discloses a low-energy-consumption mixed C4 alkane-olefin separation device, comprising: a C4 evaporator or tank, an extractive distillation column for separating alkane and olefin, and a stripping column. The inlet of the extractive distillation column is connected to the top outlet of the C4 evaporator or tank, the stripping column is connected to the bottom of the extractive distillation column, and the top of the stripping column is connected to the inlet of a C4 olefin reflux tank. A chilled water system is also connected between the top of the stripping column and the inlet of the C4 olefin reflux tank to cool the C4 olefins before reflux. By installing a chilled water system at the top of the stripping column, this invention allows for lower-pressure operation within the stripping column, reducing overall energy consumption, optimizing the process flow, and simplifying the number of equipment. Furthermore, the separation effect of olefins cooled to low temperatures by chilled water under low pressure is better, improving the recovery rate and purity of C4 alkane and C4 olefin.