284results about How to "Realize automatic transmission" patented technology

The invention relates to an online monitoring system and monitoring method for subway tunnel deformation. The monitoring system comprises a data information collecting subsystem, a data communication subsystem, a data collecting and analyzing subsystem and a monitoring alarming subsystem. The monitoring system is used for realizing real-time online collection of the data information of subway tunnel deformation, performing centralized analysis treatment on the collected data information of subway tunnel deformation under the current condition of a subway tunnel and performing early warning and alarming. The online monitoring for subway operation safety is realized on the basis of technology of the Internet of Things. The online monitoring system has the advantages of simple structure, low cost, labor saving, complete data collection, high efficiency, humanization, intelligence, and the like.

The invention relates to a system and a method for monitoring the displacement of the deep part of landslide. The system comprises a base, wherein a measuring device is installed on the base, at least one displacement sensor is arranged in the measuring device, one end of each pull wire passes through the base to be connected with the displacement sensor, and the other end of each pull wire is fixedly connected with the anchor heads which are embedded in a slide bed part. Drill holes are dug in a landslide body, and the anchor heads are put in the drill holes. When a plurality of pull wires are used, the anchor heads are separately arranged in different depths, brittle casings are arranged in the anchor heads, cement mortar is cast between the drill holes and the brittle casings, the measuring device is fixedly installed, and through the steps, monitoring the multipoint displacement of the deep part of a large-deformation landslide is achieved. Through adopting the structure, the system and the method have the advantages that the large displacement of the deep part of the landslide can be measured, according to the concrete depth of the landslide body, the anchor heads of a plurality of pull wires are arranged in different depths, and the lengths of the drawn pull wires drawn are different, so that the displacement signals of the landslide body in different depths can be obtained.

The invention discloses a shield-tunneling-machine wireless data collecting system based on a mobile phone. The shield-tunneling-machine wireless data collecting system comprises a shield upper computer, a switch, a wireless router, the mobile phone and a remote monitoring server. The shield upper computer, the switch and the wireless router are arranged on a shield tunneling machine in a tunnel, the shield upper computer is connected with the switch, and the switch is connected with the wireless router. The remote monitoring server is arranged in a remote monitoring center, and the mobile phone is movably arranged inside or outside the tunnel; the mobile phone is connected with the switch through a wireless local area network, the remote monitoring server is connected with the mobile phone through a mobile network, and data on the shield upper computer are wirelessly collected through the remote monitoring server. According to the shield-tunneling-machine wireless data collecting system, the mobile phone collects the data in the shield upper computer through WiFi signals in the tunnel, when the mobile phone is taken out of the tunnel, the collected data can be transmitted to the remote monitoring server through the mobile network, instant data transmission of the wireless router and the mobile phone are applied to the shield tunneling machine, and wireless transmission of the data is achieved.

The embodiments of the present invention disclose a treatment evaluation system and a storage medium. The system includes a patient management device, a treatment plan development device, a radiotherapy device and a control device which are in communication connection with one another; the control device includes an image update unit, a evaluation change unit and a treatment update unit; the image update unit is used for determining an updated image as a current stage image when monitoring that the image is being updated; the evaluation change unit is used for determining current valuation change values corresponding to treatment evaluation variables according to the current stage image and a current reference image; and the treatment update unit is used for prompting a user to adjust a current treatment plan when the current valuation change values are larger than valuation change threshold values so that the treatment plan development device can determine an adjusted treatment plan and updates the adjusted treatment plan as a current treatment plan. With the treatment evaluation system and the storage medium provided by the technical schemes of the invention adopted, a treatment effect can be evaluated more efficiently and more automatically, and the adjustment of the treatment plan can be promoted, and therefore, the efficiency of radiation therapy can be enhanced.

The invention discloses an automatic plugging-in device of a connector pin. The automatic plugging-in device comprises a machine frame, an emptying device, a plugging device, a plurality of terminal conveying devices, a feeding device, a discharging device, a CCD photographing device and a terminal supporting device, wherein the emptying device is fixed to the machine frame, the plugging device is connected with the emptying device in a butted mode, the multiple terminal conveying devices are arranged in front of the plugging device, the feeding device and the discharging device are arranged at the two ends of the terminal conveying devices, the CCD photographing device is arranged on the side of the plugging device, and the terminal supporting device is used for fixing mobile terminals. On the one hand, automatic conveying of other stations can be achieved; on the other hand, the automatic plugging-in device can be connected with a plurality of automatic plugging-in devices in a butted mode, so that the production efficiency is improved exponentially; the feeding device and the discharging device are arranged at the two ends of the terminal conveying devices, so that automatic feeding and discharging are achieved; due to the fact that the CCD photographing device is arranged for photographing, position coordinates of each jack in the terminals are obtained, and precise coordinates are provided for follow-up plugging-in of pins.

The embodiment of the invention discloses an emergency environment radiation monitoring system, comprising a mobile environment monitor and a center station emergency environment radiation monitor computer network system. The mobile environment monitor is arranged with an automobile gamma radiation automatic monitor, a globe positioning system GPS, two wireless communication devices which can be switched and a safe and reliable automobile power supplier, to confirm the operation stability and the reliability of real-time monitor and transmission of the system. The center station emergency environment radiation monitor computer network system adopts a digit electronic map technique adopting a geographic information GIS as a software platform, to real-timely display the gamma radiation monitor data and the GPS positioning information of the monitor on the electronic graphic interface of each network monitor station, thereby in-timely and accurately finding wind direction radioactive contamination region for nuclear power station accidents and providing reliable monitor information for emergency commanders, based on the decision of operational intervention level.

The invention discloses an electric tool which comprises a motor, an output shaft, a gear drive mechanism, a detecting assembly and a control system, wherein the gear drive mechanism is arranged between the motor and the output shaft and has different reduction ratios; the detecting assembly is used for measuring parameters presenting the load of the output shaft; and the control system can be optionally used for controlling the tool to operate at least in one of the electronic clutch mode and the automatic gear shifting mode or the combination of the two modes. Through the structure, the automatic switching of the tool among different gears can be realized, and can prevent a work package from crossing over the position when the work package reaches a preset position.

The invention provides a dam detection device based on a Beidou satellite. The dam detection device comprises a data collecting sub-device, a data transmission and communication sub-device, a data analyzing and processing sub-device and an auxiliary supporting sub-device. The data collecting sub-device comprises two receiver base stations and a plurality of monitoring stations, wherein each receiver base station is composed of a GNSS receiver and an antenna, the monitoring stations are arranged on different positions on a dam, and the receiver base stations are Beidou GPS two-satellite devices. The dam detection device can achieve high automation, greatly reduces filed intensity, and meanwhile can quickly obtain efficient and reliable three-dimensional point position monitoring data.

The invention discloses a reagent card settling transmission device. The reagent card settling transmission device can effectively convey reagent cards from a reagent card box to an operating area by a mechanical mechanism. The technical scheme of the reagent card settling transmission device includes that a baffle 2 stops the reagent cards from falling off due to gravity in the non-operating state, when a first power part 8 drives a transmission part 9 to convey a slider 3, the slider 3 pushes the baffle 2 to move towards the end of a first rail 1, the baffle 2 is distant from the bottom of the reagent card box, the reagent cards slide to the first rail 1 under the action of gravity, then the slider 3 pushes the reagent cards to move reversely, and the reagent cards are pushed to a second rail and conveyed to the operating area via the second rail; the baffle 2 moves towards the compression direction of a spring 4 under the pulling force of the spring 4 and finally stops at a limit column 7 and then the baffle returns to the initial position and stops the reagent cards from continuously falling off. Accordingly, the reagent cards can be automatically conveyed to the operating area from the reagent card box by the mechanical mechanism, and operation efficiency is improved.

The invention is applicable to the technical field of automatic speed change and provides an automatic speed changing method and device for a hybrid power bicycle. The method comprises the following steps that a, a sensor set acquires a current riding state signal in real time and transmits the signal to a microprogrammed control unit (MCU); b, the MCU outputs a control signal to a motor controller according to the current riding state signal; and c, the motor controller controls a motor to output the corresponding assisting speed and assisting gear according to the control signal. According to the automatic speed changing method and device for the hybrid power bicycle, a traditional mechanical gear set type speed change device is abandoned, the MCU performs judging and analysis according to the current riding state signal transmitted by the sensor, and the motor is directly controlled to output the corresponding assisting speed, and accordingly automatic speed change and automatic gear adjusting of the hybrid power bicycle are achieved, and unnecessary judgment and operations of a rider are reduced.

The invention discloses automatic assembling and lock pin equipment of an air conditioner transformer. The equipment comprises a frame, an automatic transformer body feeding mechanism, an automatic shell conveying mechanism, a transformer wire heat blowing mechanism, an automatic screw blowing mechanism, an automatic finished product output mechanism, a transformer wire stripping mechanism, an automatic nailing mechanism, an automatic transformer body grabbing mechanism, an automatic shell grabbing mechanism and a PLC control box, wherein the automatic transformer body feeding mechanism, the automatic shell conveying mechanism, the transformer wire heat blowing mechanism, the automatic screw blowing mechanism, the automatic finished product output mechanism, the transformer wire strippingmechanism, the automatic nailing mechanism, the automatic transformer body grabbing mechanism and the automatic shell grabbing mechanism are installed on the frame according to designated positions. And the PLC control box is electrically connected with automatic operation parts of all the mechanisms, and automatic operation is achieved through program control. The automatic assembling and lock pin equipment is compact in structure and reasonable in layout; automatic conveying, grabbing and assembling of a transformer shell and a transformer body, automatic supply and nailing operation of screws and automatic output of finished products are achieved; and automatic operation is completely adopted, labor is greatly saved, working efficiency is improved, labor intensity is reduced, and operation safety is greatly improved.

The invention provides a high-temperature glass digital ink-jet printer. The high-temperature glass digital ink-jet printer is used for printing pictures for glass in various sizes. The high-temperature glass digital ink-jet printer comprises a bottom frame module used for bearing glass, a three-axis movement module, a character vehicle and an upper computer. The bottom frame module comprises a rack which is horizontally arranged, a glass fixing device and a glass conveying device. The glass fixing device is used for fixing the glass when the printer carries out printing. The glass conveying device is used for driving the glass to horizontally move. The three-axis movement module comprises an X-axis movement module body, a Y-axis movement module body and a Z-axis movement module body, by means of the three-axis movement module, movement of the character vehicle in the X-axis direction, the Y-axis direction and the Z-axis direction is achieved. The character vehicle comprises a vehicleframe, an ink box assembly, a heat gun assembly and a printing nozzle assembly, and the character vehicle is used for executing printing movement. The upper computer controls the printer to execute designated movement.

A kind of road traffic parameter determination device and determination method, it belongs to road traffic parameter collection field. A road traffic parameter determination device, includes vehicle real time monitor system which is composed of GPS vehicle monitor terminal GMT and monitor center MC, its characteristic is that: there is a GIS electron map linked with the vehicle real time monitor system, GIS electron map saves the real road information, sets electron enclosure in the wanted determine area in the GIS electron map. A road traffic parameter determination device, first judges whether the vehicle enter the first electron enclosure according to the gained data, if it has entered, the counter adds one, then determines the next data, to see whether there is new car entered, and then determines whether the car enters the second electron enclosure area, according to the data of the two electron enclosure area, calculates the road traffic parameter, gains the traffic state of the road. The date in this invention is real time, the range is large, and it is correct.

The invention discloses a measuring method of ground depression value, which comprises: separately arranging a plurality of interconnected liquid storage drums with right amount liquid on the tested point; arranging a plumb on each liquid storage drum which can be floated by balanced weight; when the test point occurs after ground depression, it measures the plumb height change of each test point; using one liquid storage drum as base drum and computing the ground depression value of each test point by the plumb change value of each test point and the ground depression value of the base drum. The invention also discloses the device of the method which comprises the liquid storage drums with right amount liquid on the tested point, the plumb on each liquid storage drum which can be floated by balanced weight, wherein the liquid storage drum is connected with each other by pipes.

The invention relates to an intelligent transporting cart with a track memory function. The intelligent transporting cart comprises a cart body capable of operating in a manual mode, memory mode or automatic transportation mode, and a remote control device capable of controlling starting and stopping, traveling direction and switching among the three operation modes of the cart body, wherein the cart body comprises two power wheels symmetrically arranged on the front side and a universal wheel arranged on the back side, a main control module, an ultrasonic ranging module, an optical-electricity encoder, an electronic compass, a camera and a motor module are arranged on the cart body, and the ultrasonic ranging module, the optical-electricity encoder, the electronic compass, the camera and the motor module are connected with the main control module. Remote operation of the cart can be achieved, cargos can be transferred to a destination from a starting point by the cart through automatic transportation without manual intervention by identifying a stored path, manual operation is not needed in the whole process, and automatic transportation of cargos can be achieved under the condition that no landmark or rail is arranged on the ground.

The embodiment of the invention discloses an information processing method, an information processing device and electronic equipment. A file transmission mode is determined on the basis of information carried in a speech flow acquired by an audio acquisition module and a speech flow output by an audio output module; a file corresponding to a file identification mark is found; the file is automatically transmitted to a receiving end from a sending end through the determined file transmission mode; therefore, automatic transmission of the file is realized; a user does not need to search a file to be shared manually, so that operation when the file is shared by users is simplified, namely, by means of the information processing method, the information processing device and the electronic equipment provided by the embodiment of the invention, file transmission can be automatically realized in a conversation process by the user; the file to be shared can be automatically sent to the other side of conversation when a user says a word including pre-set information and the identification mark of the file to be shared in the conversation process; and thus, operation when the file is shared by users is simplified.

A compact wafer automatic transmitting device overcomes shortages that the prior art can not do complicated actions in a narrow space in a processing procedure and the like, which comprises a framework, a material loading platform, a wind chest body and an arm mechanism. The technical key includes that a lifting motor and an extending motor are not arranged on an identical plane, a lower arm is connected with a catching mechanism through a translating mechanism and a turnover mechanism, the catching mechanism is driven by a geared linkage driving mechanism to rotate around a shaft line, a catching motor of the catching mechanism drives a holding jaw to reciprocate, and a locating mechanism on the catching mechanism can be equipped with an adjustable locating block. The compact wafer automatic transmitting device is reasonable in design, stable in operation when transmitting during the processing procedure, and flexible and reliable in action, completes automatic transmitting of wafers in horizontal or perpendicular state in a limited travel space, simultaneously realizes left and right translating and turnover of a wafer cassette to be suitable for totally realizing automatic transmitting in a narrow space in which center distances of process equipment which are in parallel arrangement are smaller than the center distance of the transmitting device, and can flexibly stop when encountering interference of outsides, thereby achieving transmitting effect of accurate control.

The invention discloses a coal rock cutting dust generation experiment system which comprises a cutting part, an experiment condition control part, a dust collecting part, a breakage form recording part and a control and signal processing part. The cutting part comprises a loading device vertically moving downwards, cutting teeth and a fixed frame. The experiment condition control part comprises aconfining pressure loading device and a positive-pressure variable-frequency draught fan. The dust collecting part comprises a negative-pressure variable-frequency draught fan and a dust collecting filter membrane. The breakage form recording part comprises a high-speed dynamic analyzer and an infrared thermal imager. The control and signal processing part comprises a signal collecting device, aPLC module and an upper computer. The coal rock cutting and breaking dust generation simulation experiment under the conditions such as different coal rock samples, different cutting tooth types, different cutting parameters (invasion angles, cutting depths and cutting speeds) and different wind velocities can be developed, and the innovation means can be provided for physically simulating the cutting tooth coal rock breaking process and further studying the coal rock cutting dust generation mechanism.

The invention discloses a pneumatic logistics workstation. The pneumatic logistics workstation comprises a sending workstation and a receiving workstation, wherein the sending workstation and the receiving workstation are connected by virtue of a pneumatic pipeline, the sending workstation comprises a sample sending shell, the pneumatic pipeline extends into the sample sending shell so as to form a pipeline interface which is connected with a sleeve group, the sleeve group can axially slide along the pipeline so as to form a telescopic lifting part, a transmission platform is connected to one side of the sample sending shell, the platform extends below the pipeline interface so as to continuously transmit sample bottles to a sample sending station, and the sleeve group slides downwards to cover the sample bottles at the sample sending station, so that the pneumatic logistics sample sending operation is realized. According to the pneumatic logistics workstation, the telescopic lifting part of the pneumatic pipeline interface in the sending workstation directly descends to cover the sample bottles, and then the sample bottles are sent to the receiving workstation by suction force generated by the pneumatic logistics workstation, so that automatic transmission and slow storage of samples are realized.

The invention discloses an automatic medicine packaging machine. A medicine plate is conveyed to a conveyer belt by using a medicine plate feeding device, and is further conveyed to a capsule feedingdevice through the conveyer belt to place capsules on the medicine plate tidily, the medicine plate is further conveyed to a medicine plate membrane pasting device for sealing through the conveyer belt, and finally the medicine plate is cut into an expected specification by using a cutting device, so that full-automatic packaging of granule medicines is achieved. The packaging machine is simple instructure, stable in operation and low in maintenance cost, filling and partitioning of capsules and medicine plates can be efficiently completed, the working efficiency is greatly improved, the packaging machine is applicable to packaging of different tablets or pills, the applicability of the packaging machine is improved, and very high popularization values can be made.

The invention provides a machining machine tool and machining method special for a plate frame type part. The left side surface of a base A is fixedly connected with a Y-axis feeding device. A horizontal milling device A is fixedly connected with the upper surface of the left side of the Y-axis feeding device. A vertical milling device is fixedly connected with the upper portion of the horizontalmilling device A. The upper surface of the right side of the Y-axis feeding device is fixedly connected with a supporting shell. A hollow shell body is arranged on the right side of the supporting shell. The upper end of the hollow shell body is fixedly connected with two L-shaped cantilevers along a Y axis. The tail end of each cantilever is fixedly connected with a clamping and overturning mechanism. A rotating worktable is fixedly connected the upper portion of the middle of the Y-axis feeding device. A lifting opening and closing mechanism is fixedly connected with the upper portion of therotating worktable. A machine tool outer shell is fixedly connected with the upper surface of the right side of the base A. A horizontal milling device B is connected between the machine tool outer shell and the supporting shell. A transmission device and the lifting opening and closing mechanism are arranged coaxially in the X-axis direction. The lifting opening and closing mechanism is locatedat the center of a conveying device. The machining machine tool aims to improve the mechanization degree and ensure the quality of a machined workpiece.

The invention discloses a method for monitoring the performance of exchange boards across safety subareas. The method includes receiving operation commands for configuring monitored exchange board equipment on safety areas III by the aid of an acquisition server; extracting operation commands required to be transmitted to safety areas II from the operation commands; transmitting the operation commands required to be transmitted to the safety areas II to an acquisition server for the safety areas II by a reverse isolation device. The method has the advantages that operation instruction files can be automatically transmitted across the safety subareas, and accordingly the work efficiency can be improved. The invention further discloses a system for monitoring the performance of the exchange boards across the safety subareas.

The invention discloses an automatic conveyer, comprising a charging mechanism, a feeding mechanism, a discharge mechanism and a feeding cam shaft mechanism, wherein the feeding mechanism comprises two feeding support roller carriers, a feeding plate, a pushing plate, a slide rail, a feeding shifting fork mechanism and a heat button work plate; the slide rail is fixed on a slide rail base; the feeding support roller carriers are fixed on the bottom surface of the feeding plate; the pushing plate is arranged in the middle of the top surface of the feeding plate; the feeding plate is connected with the slide rail; the feeding shifting fork mechanism comprises a feeding shifting fork, a pin shaft, a spring A and a shifting fork bracket; the spring A is sleeved on the pin shaft and fixed on the shifting fork bracket together with the feeding shifting fork; the shifting fork bracket is arranged at the back side of the feeding plate; the heat button work plate is divided into a front-end position, a rear-end position and a middle position. The automatic conveyer is simple and practical in structure design, automaton that semi-finished product plastic heddles are orderly conveyed to the work part to output is achieved, the work efficiency for processing the plastic heddles is greatly improved, and the production cost is reduced.

The present invention discloses a chip mounter, and relates to the technical field of chip mounters. The chip mounter comprises a working platform, an X-shaft cross beam, a first X-shaft device, a second X-shaft device, a transportation platform and chip mounting head devices. The X-shaft cross beam is located above the working platform, the first X-shaft device and the second X-shaft device are symmetrically installed on the X-shaft cross beam, and the chip mounting head devices are respectively slidingly installed on the first X-shaft device and the second X-shaft device; the transportationplatform is arranged on the working platform, the working platform is located below the X-shaft cross beam, and the transportation platform is configured to drive a carrying tool to move in a Y-shaftdirection; one side of the first X-shaft device is provided with a first feeder; and one side of the second X-shaft device is provided with a second feeder. The two chip mounting head devices are employed to perform chip mounting operation of a PCB in order so as to improve the chip mounting efficiency of a LED lamp bead and meet the demand of a production speed.

The invention relates to the technical field of bicycles, in particular to an automatic speed-changing device. The automatic speed-changing device comprises a pull wire, a derailleur, a drive mechanism, a sensor and a controller, wherein one end of the pull wire is connected with the output end of the drive mechanism, and the other end of the pull wire is connected with the derailleur; the drive mechanism and the sensor are electrically connected with the controller respectively; the sensor is used for monitoring a movement frequency value of a pedal crank and sending the movement frequency value to the controller; the controller generates a movement instrument of a corresponding gear according to the movement frequency value and sends the movement instruction to the drive mechanism; the drive mechanism executes the movement instruction, and the derailleur is adjusted to be at an angle of the corresponding gear under drive of the pull wire. According to the automatic speed-changing device, the controller controls the drive mechanism, and the pull wire changes the angel of the derailleur, so that automatic bicycle speed changing can reach the best state.

The present invention provides a telephone data terminal system using USB interface to realize data automatic transmission of manpower dial-up and data automatic transmission method thereof. The system includes a CPU, a USB host computer chip, a static RAM internal memory, an E2ROM modem, a CPLD, a power supply circuit, a USB interface, a keyboard, a display screen, telephone line interfaces, a SD card, a relay, an LED indicating lamp and a buzzer. The data automatic transmission method includes steps of procedure detecting U disk, initiating call by pressing dialing key on the keyboard, sending the data, off-hook , receiving data, and automatically breaking telephone connection. The inventive telephone data terminal system has advantages of simple operation, low professional requirement, convenience and shortcut(automatic data transmit-receive can be completed by dialing the telephone), and high efficiency.

The invention discloses a building waste crushing device which comprises a body, wherein a feed inlet is formed in the top end of the body, a fixed block is welded and fixed to the inner wall of one side of the top end of the body, a second pressure block is welded and fixed to one side of the fixed block, a hydraulic cylinder is fixed to the outer wall of the other side of the top end of the bodythrough a screw, the output end of the hydraulic cylinder is fixed to one end of a hydraulic rod through a key pin, the other end of the hydraulic rod is vertically welded and fixed to the middle ofone side of a first pressure block, connecting blocks are welded and fixed to two sides of the inner wall of the middle of the body, one end of each connecting block is connected to an opening and closing plate through a hinge, the bottom end of the opening and closing plate is welded and fixed to one end of a telescopic rod, the other end of the telescopic rod is welded and fixed to the inner wall of the body, a motor is fixed to the outer wall of one side of the bottom end of the body through a screw, a rotary shaft is fixed to the output end of a motor, and the rotary shaft is inserted andfixed to the middle of a hobbing cutter, so that the stirring efficiency is improved greatly, and the service life of the machine is prolonged.

The invention discloses an embedded Beidou satellite short message communication control system which comprises a measuring node, a data transmitting and receiving controller having a gateway function, a Beidou communication terminal and a server. The measuring node is used for collecting environmental data and communicating with a gateway by using a Zigbee. The data transmitting and receiving controller having the gateway function collects measurement data and controls the Beidou communication terminal to transmit and receive data. The Beidou communication terminal communicates with a Beidou satellite. The server is connected with the gateway via a twisted pair to display, monitor, and store the measurement data in real time. The data transmitting and receiving controller having the gateway function and the measuring node form a wireless sensor network. The Beidou communication terminal and an improved reliable transmission algorithm achieve remote measurement, reliable data transmission, and system automation transmission, and improve the quality of communication.

The invention provides a method and a system for opening a number. The method comprises the following steps: communication connection between a client terminal and a target terminal is established; the client terminal sends a request to the target terminal for obtaining the attribute information of a non-activated SIM card in the target terminal; the client terminal receives the attribute information of the non-activated SIM card returned by the target terminal; the client terminal sends the attribute information of the non-activated SIM card to an operator server of the non-activated SIM card; and the operator server generates a subscriber number and configuration information of the non-activated SIM card, and sends the configuration information to enable the target terminal to be configured with the same subscriber number as the client terminal according to the configuration information. Automatic transmission of information between the client terminal and the target terminal is realized, and the efficiency and accuracy of number opening are improved.