46results about How to "Reduce positioning time" patented technology

The invention provides a lane line-based vehicle positioning method, a calculating device, an intelligent vehicle, and a surface mark-based vehicle positioning method are provided. The lane line-basedvehicle positioning method includes the following steps: obtaining a visual map including lane line information; initially determining the current position of a vehicle in a world coordinate system;generating a top view having the same proportion and dimension with the visual map based on an image currently captured by a vehicle camera; determining the position of the top view on the visual mapbased on the initially determined current position of the vehicle, and determining a lane line part on the visual map, used for matching, as a visual map matching lane line mark based on the positionof the top view on the visual map; searching a lane line part matched with the visual map matching lane line mark on the top view; and determining a coordinate transformation relationship between thetop view and the visual map based on the matching lane line part on the top view and the visual map matching lane line mark in order to accurately determine the current position of the vehicle in theworld coordinate system.

The invention provides a quick positioning method based on wireless TOF and a system thereof. The method comprises the following steps of 1, broadcasting a ranging request to at least three base stations through a to-be-positioned label; 2, after each base station in the first step receives the ranging request, transmitting a response message to the label by the base stations according to a preset time sequence in a server; 3, after the label collects all response messages in the step 2, generating a final message through label gathering, and broadcasting the final message to each base station; 4, after each base station receives the final message, extracting corresponding time stamp data by each base station according to the respective ID, and calculating the distance between each base station and the label; and 5, calculating the position of the label by a server according to the distance between each base station and the label. The quick positioning method and the system thereof have advantages of realizing high-efficiency positioning, improving system capacity and reducing power consumption.

The invention provides a WLAN (wireless local area network) positioning method and a positioning server for positioning a third part. The positioning server receives a positioning request launched by the third part, searching an MAC (media access control) address corresponding to a WLAN networking account of a terminal to be positioned, inquiring an IP (internet protocol) address corresponding to the WLAN networking account; inquiring the corresponding relation between the IP address and the MAC address of an AP (access point), acquiring an MAC address list of the AP; acquiring a list of WLAN terminals related to the AP currently in the MAC address list of the AP; searching the list of the WLAN terminals according the MAC address of the terminal to be positioned, and finding out the MAC address of the AP related to the terminal to be positioned, searching longitude and latitude of the MAC address of the AP according to the corresponding relation between the longitude and the latitude and the MAC address of the AP, and acquiring the position of the terminal to be positioned, wherein the MAC address list of the AP includes the MAC address of an AP into which the terminal to be positioned accesses. Positioning time length is reduced and operation complexity of positioning of the third part is reduced.

The invention provides a method and device for determining the position of an access point, and the method comprises the steps: obtaining signal intensities detected by a plurality of network signal detection devices in a preset access point signal coverage at the same time; obtaining the distances from the network signal detection devices to a preset access point according to the signal intensities; constructing a plurality of spherical surfaces according to the distances, and obtaining the connection lines among intersection points of the plurality of spherical surfaces; obtaining detected signal intensities at the same time after the network signal detection devices moves along the connection lines; and determining the position of the preset access point according to the detected signal intensities after the network signal detection devices moves along the connection lines. The method carries out two-time simultaneous obtaining of the signal intensities of the preset access point through the plurality of network signal detection device, so as to determine the position of the access point. The method achieves the quick and accurate positioning of the access point, gets rid of the limits from the inaccurate description of marks and files of construction drawings, is less in positioning time, and improves work efficiency.

The invention provides a method and system for detecting a road collision accident, and belongs to the technical field of intelligent traffic. The method includes the steps: generating a collision accident message after a collision accident detecting device detects a collision signal, and sending the collision accident message to a roadside communication node, wherein the collision accident message includes identification information corresponding to the collision accident detecting device; sending the collision accident message to a monitoring center through the roadside communication node; enabling the monitoring center to determine the location of a road segment where the collision accident occurs according to the identification information included in the collision accident message. The collision detection device detects the collision signal, and sends the identification information corresponding to the collision accident detecting device to the monitoring center through the roadside communication node, so that the monitoring center determines the location of the road where the collision accident occurs. The method can accurately and timely determine the location information ofthe traffic accident, and reduces positioning time.

The invention provides a fault positioning method and a fault positioning device, and relates to the field of semiconductors. The fault positioning method comprises the following steps: pre-judging a suspected fault area by using the layout of the fault IC carrier plate and an impedance test result, and then grinding the suspected fault area; and electrifying the ground fault IC carrier plate, carrying out thermal imaging on the electrified fault IC carrier plate, and obtaining a temperature abnormal area, wherein the temperature abnormal area is a leakage fault position. The fault positioning device comprises an impedance detection module, a grinding module, a power supply module and an infrared imaging module, the impedance detection module is used for detecting the impedance of the fault IC carrier plate, the grinding module is used for grinding a suspected fault area of the fault IC carrier plate, and the power supply module is used for electrifying the ground fault IC carrier plate. And the infrared imaging module is used for carrying out thermal imaging on the electrified fault IC carrier plate. The fault positioning method and the fault positioning device provided by the invention are accurate in positioning, high in success rate and short in time consumption.

The invention relates to a positioning method for children's wearable equipment. The positioning method includes that the wearable equipment receives an outside positioning instruction; the wearable equipment sequentially detects whether there are WIFI signals, satellite signals and base station signals around the wearable equipment or not; the wearable equipment performs positioning according tocoincident signals when the coincident signals are detected and stops subsequent signal detection; the wearable equipment feeds a positioning result back to the outside. A WIFI positioning mode is adopted preferentially for positioning, so that the positioning method has the advantages of high positioning accuracy and high speed and can realize quick positioning of occasions with WIFI; positioningis performed through a satellite if there is no WIFI, a base station is applied to positioning when satellite signal intensity is not enough for positioning, and the positioning method can complete positioning in one step in most circumstances, so that success rate of single-time positioning is increased, power consumption of repeated positioning is reduced, positioning time consumption is shortened, and user positioning needs in most circumstances can be met.

The invention provides an artificial swarm-based direct positioning method. According to the method, an array antenna to receive a signal time domain model; a frequency domain observation model of a received signal is obtained; a target function is established to determine a fitness function; control parameters are initialized, a fitness value of each initial solution is calculated, neighborhood search is carried out by honey gathering bees to generate new solutions, and fitness values corresponding to the new solutions are calculated to carry out greed selection; selection probabilities related to the solutions are calculated, neighborhood search is carried out again to generate new solutions, and fitness values corresponding to the new solutions are calculated to carry out greed selection; judgement is carried out to determine whether a to-be-abandoned solution exits or not, of the judging result is positive, a new solution is generated to replace the to-be-abandoned solution and thenew solution is recorded; and finally, judgement is carried out to determine whether a termination condition is satisfied or not, if the judging result is positive, an optimum result is output, and otherwise, new solutions are continuously and repeatedly generated to replace the old solutions and subsequent steps are carried out. According to the method, an artificial swarm algorithm is introduced to solve the solving of non-linear optimization problems in direct positioning process, so that the operation resource consumption is decreased and the positioning time consumption is shortened.

The invention discloses a power-on method and a power-on device of a set top box. The power-on method comprises the following steps: responding to a power-on instruction of the set top box, and establishing a plurality of middleware thread functions; establishing a file access mark corresponding to an accessed initialized data file while beginning to access the initialized data file by utilizing the middleware thread functions, and storing the file access mark; and deleting the stored file access mark corresponding to the initialized data file only when determining that the initialized data file is successfully accessed through the middleware thread functions. According to the invention, the file access mark corresponding to the data file, which is not accessed successfully, is stored; therefore, the initialized data file having problems can be easily known subsequently; it is unnecessary to check partitioned data one by one; and thus, the wrong data positioning time consumption is greatly reduced.

The invention discloses a data mining method and device, a data processing method and device, a storage medium and electronic equipment, and the method comprises the steps: obtaining a second entity object information set meeting a selection requirement according to current first entity object information; wherein the current first entity object information and second entity object information in the second entity object information set are of a first entity type; analyzing address information corresponding to the second entity object information, and determining candidate entity unit structured information used for representing the address information; analyzing current address information corresponding to the current first entity object information, and determining current entity unit structured information used for representing the current address information; performing matching according to the current entity unit structured information and candidate entity unit structured information, and determining a first type of representation information used for describing the current first entity object information; therefore, rich data support is provided for the positioning scene, the positioning accuracy is improved, and the positioning time consumption is reduced.

The invention discloses a guardrail climbing ladder generating device. The guardrail climbing ladder generating device includes a long ladder feeding mechanism, a handrail feeding mechanism, a clamping mechanism and a fence feeding mechanism. The long ladder feeding mechanism is fixedly installed on the ground, a storage mechanism is arranged in the long ladder feeding mechanism, a long ladder canbe fed to the position to be welded according to the specified size under the drive of a motor, the handrail feeding mechanism is fixedly arranged on the ground, a storage mechanism is arranged in the handrail feeding mechanism, a handrail can be fed to the position to be welded according to the specified size under the drive of the motor, positioning and clamping functions are achieved, the clamping mechanism is fixedly installed on the handrail feeding mechanism and plays a role of clamping parts to be welded before welding, the fence feeding mechanism is fixedly installed on the long ladder feeding mechanism, a storage mechanism is arranged in the fence feeding mechanism, and the long ladder can be fed to the position to be welded according to the specified size under the drive of themotor. The guardrail climbing ladder generating device has the advantages of automatic feeding, automatic positioning, automatic clamping, the ability to change the size at will and the like.

The invention provides a positioning method for a performance fault of a distributed database. The positioning method comprises the following steps: acquiring an SQL sentence sent by a user, and positioning the SQL sentence; searching problem nodes with the performance fault from nodes of the distributed database; comparing the SQL sentence execution plans of the problem nodes and the non-problem nodes; searching and determining the resource use conditions of the problem nodes; determining whether all problem nodes are positioned; and examining and correcting the performance of a coordinator. With the adoption of the method, the time of positioning the fault under the distributed database environment can be greatly reduced; the performance fault can be effectively, accurately and reliably positioned, so that the maintenance time and cost can be reduced, and the running stability of the distributed database can be improved.

The invention discloses a novel intelligent plastic manufacturing and production device. The novel intelligent plastic manufacturing and production device comprises a carrying plate. A bottom plate isarranged in the middle of the upper surface of the carrying plate, a round table is fixedly arranged on the top of the bottom plate, a supporting rod is fixedly arranged in the middle of the lower surface of the bottom plate, a gear b is fixedly arranged in the middle of the supporting rod, a rotary rod is arranged on the left side of the gear b, the rotary rod penetrates through the carrying plate, and the rotary rod and the supporting rod are rotationally connected with the lower surface and the upper surface of the carrying plate through two sets of bearings correspondingly. Gears a and the gear b are mounted, a pedal is pressed with a foot, a sliding block of the pedal is driven to move in a guide rail left and right, the sliding block drives a rack to move, the rack drives the two sets of gears a of the rotary rod to rotate, the gears a drive the gear b of the supporting rod to rotate, a plastic drum workpiece on the round table on the top of the bottom plate rotates, the mannerthat currently, the plastic drum is rotated with one hand and paint is brushed or sprayed with the other hand is replaced, double-hand simultaneous painting work is achieved, the painting working efficiency is improved, and the novel intelligent plastic manufacturing and production device is suitable for being widely used and popularized.

The embodiment of the invention discloses a control method and device, equipment and a computer readable storage medium, and the method comprises the steps: obtaining first operation information acting on a content display interface, and displaying an anchor point capable of controlling the content display interface on the content display interface, wherein the anchor point is generated at least according to a display object of the content display interface; if the first operation information comprises a first target operation acting on a target anchor point, controlling display output of target content corresponding to the target anchor point on the content display interface at least according to the first target operation; and / or, if the first operation information comprises a second target operation acting on the target display object, updating the display state of the anchor point at least according to the second target operation.

The invention discloses a method and device for positioning a touch point, and belongs to the technical field of touch. The method comprises the following steps: determining at least one candidate region in an infrared touch screen; determining related regions of the candidate region from a touch region in multiple scanning directions for each candidate region from at least one candidate region; judging whether the related regions in at least two scanning directions are designated related regions in the related region of the candidate region or not; intersecting center lines of related regions in any two scanning directions in at least two scanning directions to obtain at least one candidate intersection point when related regions in at least two scanning directions in the related regions of the candidate region are designated related regions; and determining a true touch point in the infrared touch screen from at least one candidate intersection point. The method can be used for shortening the time consumption for positioning the touch point and improving the response speed of the touch point.

The invention relates to the technical field of shredding machine blade replacement, and discloses a shredding machine blade quick replacement mechanism which comprises a rotating roller, a pre-positioning mechanism is arranged on the outer side of the rotating roller, and a fixing mechanism is arranged in the rotating roller; the pre-positioning mechanism comprises a plurality of fixing frames, the inner wall of each fixing frame is fixedly connected with the outer surface of the rotating roller, two cutter bodies are slidably connected to the inner wall of each fixing frame, positioning columns are fixedly connected to the side faces, close to each other, of each set of cutter bodies, and the outer surface of each positioning column is slidably connected with the inner wall of the corresponding fixing frame. According to the rapid replacement mechanism for the shredder blade, by arranging the fixing frame, a stable mounting and bearing foundation can be provided for the cutter body, meanwhile, pre-positioning of the cutter body is achieved in cooperation with the magnetic attraction effect of a positioning column and a powerful magnet, and when an operator slides the cutter body into the fixing frame, the positioning column can move along the guide track of the fixing frame; and the adsorption force is generated.

The invention discloses a method and device for positioning a touch point, and belongs to the technical field of touch. The method comprises the following steps: determining at least one candidate region in an infrared touch screen; determining related regions of the candidate region from a touch region in multiple scanning directions for each candidate region from at least one candidate region; judging whether the related regions in at least two scanning directions are designated related regions in the related region of the candidate region or not; intersecting center lines of related regions in any two scanning directions in at least two scanning directions to obtain at least one candidate intersection point when related regions in at least two scanning directions in the related regions of the candidate region are designated related regions; and determining a true touch point in the infrared touch screen from at least one candidate intersection point. The method can be used for shortening the time consumption for positioning the touch point and improving the response speed of the touch point.

The utility model relates to the technical field of buckle type fasteners, and discloses a buckle type fastener convenient for blind installation and positioning, which comprises a screw, a sliding ring is arranged on the outer wall of the screw, the outer wall of the sliding ring is connected with a nut through a buckle assembly so as to limit the sliding ring after the screw is installed, a threaded groove is arranged on the inner wall of the sliding ring, and the threaded groove is connected with the nut. A groove is formed in the top end of the screw, the direction of the threaded groove is the same as the thread direction of the screw, and connecting blocks are fixedly connected to the front end and the rear end of the sliding ring. According to the anti-loosening screw, after the screw is rotated into the sliding ring, the clamping block is clamped on the upper side of the sliding ring to limit the screw, mechanical locking can be formed through rigid meshing of the clamping block and the sliding ring, screw loosening caused by external force such as vibration and impact is effectively resisted, and compared with a traditional anti-loosening mode, the anti-loosening screw has a more stable limiting effect; and the structure is compact and simple, clamping and fixing can be rapidly completed without additional tools during assembling, the assembling efficiency is improved, and positioning time consumption is reduced.

The invention provides a method and device for determining the position of an access point, and the method comprises the steps: obtaining signal intensities detected by a plurality of network signal detection devices in a preset access point signal coverage at the same time; obtaining the distances from the network signal detection devices to a preset access point according to the signal intensities; constructing a plurality of spherical surfaces according to the distances, and obtaining the connection lines among intersection points of the plurality of spherical surfaces; obtaining detected signal intensities at the same time after the network signal detection devices moves along the connection lines; and determining the position of the preset access point according to the detected signal intensities after the network signal detection devices moves along the connection lines. The method carries out two-time simultaneous obtaining of the signal intensities of the preset access point through the plurality of network signal detection device, so as to determine the position of the access point. The method achieves the quick and accurate positioning of the access point, gets rid of the limits from the inaccurate description of marks and files of construction drawings, is less in positioning time, and improves work efficiency.

The invention discloses a fast fingerprint positioning method based on PQ and CNN. First, an ADCPM fingerprint matrix for subsequent fingerprint matching is designed. When the scale of the fingerprint database is small, a fast positioning algorithm based on PQ is used to calculate the physical location corresponding to the fingerprint. When the scale of the fingerprint database is large, the output obtained by the fast positioning algorithm based on CNN is the two-dimensional coordinates of the vector to be positioned. The invention is not only beneficial to improve the online positioning speed under the large-scale fingerprint database, but also maintains high positioning accuracy.

The embodiment of the present invention discloses a data detection method, device and storage medium. The method is suitable for application of test tools, wherein the method includes the following steps: obtaining query object information and application program identifier from the program script file; Obtain multiple detection rule information from the query database corresponding to the application identifier, and perform anomaly analysis on the query object information in turn according to the detection priorities corresponding to the multiple detection rule information to obtain the analysis result; When the analysis result corresponding to the target detection rule information in the rule information is an abnormal result, the abnormal analysis of the query object information is stopped, and the error cause information is determined according to the analysis result corresponding to the target detection rule information, and the error cause information is used. The output is displayed. By adopting the present invention, the labor cost can be reduced, and the time-consuming of abnormal problem locating can be reduced.

The invention relates to the technical field of clamps, in particular to a rapid workpiece positioning device, which comprises a clamp body, a clamping part, a stop pin, a positioning pin, a stud, a nut, a pressing plate and a short pin. The rapid workpiece positioning device has the beneficial effects that the stop pin is used for stopping and limiting a first positioning reference on the workpiece; the short pin is used for limiting a second positioning reference on the workpiece; meanwhile, the pressing plate is pressed by the nut, the workpiece is then pressed with the pressing plate, further, the workpiece is limited on the clamp body; the clamping part on the clamp body is connected with a clamping jaw of an external numerical control lathe, so that taper hole machining can be conducted on the workpiece through the lathe, the mode that a vertical machining center is used for machining in the prior art is replaced, the workpiece positioning time is shortened, the positioning efficiency and the machining efficiency are improved, and meanwhile the equipment cost is reduced.

The invention provides a WLAN (wireless local area network) positioning method and a positioning server for positioning a third part. The positioning server receives a positioning request launched by the third part, searching an MAC (media access control) address corresponding to a WLAN networking account of a terminal to be positioned, inquiring an IP (internet protocol) address corresponding to the WLAN networking account; inquiring the corresponding relation between the IP address and the MAC address of an AP (access point), acquiring an MAC address list of the AP; acquiring a list of WLAN terminals related to the AP currently in the MAC address list of the AP; searching the list of the WLAN terminals according the MAC address of the terminal to be positioned, and finding out the MAC address of the AP related to the terminal to be positioned, searching longitude and latitude of the MAC address of the AP according to the corresponding relation between the longitude and the latitude and the MAC address of the AP, and acquiring the position of the terminal to be positioned, wherein the MAC address list of the AP includes the MAC address of an AP into which the terminal to be positioned accesses. Positioning time length is reduced and operation complexity of positioning of the third part is reduced.

The invention provides a positioning tool and an electrical box assembly line provided with the same. The positioning tool comprises a tool plate, a plurality of first positioning structures which arearranged on the tool plate and are arranges at a radiator in a penetrating mode to position the radiator, a plurality of second positioning structures which are arranged on the tool plate and encircle a positioning space used for positioning an electrical box. Limiting concave portions used for limiting the electrical box are arranged on one sides, away from the tool plate, of the second positioning structures, and therefore part of the electrical box can be limited in the limiting concave portions, and electrical box positioning by the second positioning structure can be achieved. The problem in the prior art of low assembly efficiency of radiators and electrical boxes is effectively solved.

The invention discloses a positioning method. The positioning method comprises the following steps of receiving first information which is sent by a first electronic device and generated by a second electronic device, wherein the first information is not smaller than a first threshold value number and is not shorter than the time of a second threshold value; receiving second information transmitted by the second electronic device in real time, wherein the second information is not smaller than the first threshold value number; the state that the duration for receiving the second information reaches the duration of a third threshold value, calculating the duration generated for receiving the second information of the second electronic device, wherein the second information is not smaller than the first threshold value number; according to the duration, calculating the distance from the second electronic device which is not smaller than the first threshold value number; when the number of the distance of the second electronic device which is calculated is confirmed to be not smaller than the first threshold value number, transmitting the distance which is not smaller than the first threshold value number and is calculated to the first electronic device; receiving the distance which is sent by the first electronic device and is not smaller than the first threshold value number to determine position information of electronic equipment. The invention also discloses the electronic equipment. According to the positioning method and the electronic equipment provided by the embodiment of the invention, the positioning speed is increased, and the positioning duration is reduced.

This utility model discloses a connector with a snap-fit ​​mechanism, comprising a connector body, a tightening cap, and a fastening nut. The connector body is hollow and has a through hole. A first thread and a second thread are provided on the connector body. Several snap-fit ​​blocks are provided at the end of the connector body near the first thread. The tightening cap is threadedly engaged with the first thread. The inner wall of the tightening cap has an abutting inclined surface for contacting the snap-fit ​​blocks, causing them to retract and tighten around the bellows. The fastening nut is threadedly engaged with the second thread. Several positioning blocks are provided on the outer peripheral wall of the other end of the connector body. The end of each positioning block near the second thread is higher than the end of the snap-fit ​​block away from the second thread. The end of the positioning block near the second thread is connected to the end of the snap-fit ​​block away from the second thread by a smooth inclined surface. Its structure is simple, positioning and installation are convenient, fastening is reliable, and it is easy to tighten promptly when loose, resulting in good performance.

The invention relates to the technical field of automobile manufacturing, in particular to a chassis and vehicle body assembly system and a process thereof. The chassis and body assembly system comprises a bottom frame and a main tray. The main tray comprises a front tray, a middle tray and a rear tray. The front tray, the middle tray and the rear tray are sequentially arranged on the top of the bottom frame along the front-rear direction of the total tray. The distance between the front tray and the rear tray can be adjusted along the front-rear direction of the total tray. The height of therear tray can be adjusted along the height direction of the total tray. The front tray, one or more of the middle tray and the rear tray are provided with a combined positioning tip. The chassis and body assembly process adopts the chassis and body assembly system. The purpose of the invention is to provide a chassis and body assembly system and a process thereof, so as to solve the technical problem that the collinear production adjustment period of different vehicle types in the prior art is longer.

The utility model discloses cast-in-place beam formwork dismounting and erecting support adjusting device, specifically related to formwork support equipment technical field, including horizontal pole, the top fixed setting of horizontal pole has a plurality of stable frame, the inside slide of stable frame is provided with stable board, and the top of stable board is provided with fixed mechanism, and fixed mechanism includes the fixed frame of fixed setting at the top of stable board, the inside slide of fixed frame is provided with a plurality of U shape sliding block, and the top fixed setting of U shape sliding block has fixed plate, and the inner wall rotation of U shape sliding block is provided with a plurality of gyro wheel, and the surface of fixed plate is provided with connecting groove, and the surface of fixed frame is provided with a plurality of fixed slots. The utility model can adjust the support height flexibly, adapts different beam body pouring demand, and realizes fixed plate horizontal quick positioning, adapts various width formwork, and secondly gives consideration to angle adjustment flexibility and fixed stability, improves formwork angle control precision, guarantees cast-in-place beam forming quality.

The invention provides a pseudo base station positioning method, device and system and a storage medium, and the method comprises the steps: obtaining original data in a core signaling monitoring system database; screening suspicious data from the original data according to a geographic area; inputting the suspicious data into a data classification model to obtain a classification result corresponding to the suspicious data; and determining the position of the pseudo base station according to the classification result corresponding to the suspicious data. According to the method, the originaldata of the core network signaling monitoring system can be analyzed and processed to quickly position the pseudo base station, so that the positioning duration of the pseudo base station is effectively shortened, and the positioning accuracy of the pseudo base station is improved.

This utility model discloses a device for fabricating a beam reinforcement cage, used for fabricating a beam reinforcement cage when connected to an anti-slip reinforcement cage or a support column reinforcement cage. It includes a support frame placed on one side of the anti-slip reinforcement cage or support column reinforcement cage. An upper horizontal bracket and a lower horizontal bracket are provided on the upper and lower sides of the support frame, allowing them to move up and down along the support frame. Longitudinal reinforcement positioning openings are distributed on the horizontal crossbars on both the front and rear sides of the upper and lower horizontal brackets. Stirrup positioning openings are distributed on the horizontal longitudinal bar of the upper horizontal bracket. A support rod is installed at the free end of the horizontal crossbar. In use, stirrups are first installed on the stirrup positioning openings, and then the longitudinal reinforcement is passed through the stirrups. The longitudinal reinforcement is then connected to the anti-slip reinforcement cage or support column reinforcement cage and tied. This utility model facilitates the positioning and installation of stirrups and longitudinal reinforcement, improving overall assembly efficiency and the fabrication efficiency of the beam reinforcement cage.