236results about How to "Achieve combination" patented technology

The invention discloses a method and a system for clipping a video based on a browser. The method mainly comprises the following steps: creating a video editor on line through Active X technology embedded in the browser, such as flash technology; loading videos in different video websites in the video editor, or uploading the local video, and easily editing the currently loaded video; softly clipping a required video segment; and gathering the videos from different network addresses through an XML structural mode to generate a multi-source video customized by a user. The user can clip the videos in the different video websites on line, so that a plurality of video segments from the different network addresses or the same network address can be combined into a new video; and no damage is caused to the structure of the original video code. Particularly, the method and the system of the invention support various video formats, including video stream of streaming media form.

The inveniton relates to a method and system of automatic testing of electric automobile charging facilities. The testing method comprises the following steps that a device to be tested is connected to a detection platform; the device to be tested is detected according to a testing project; data detected by the detection platform are collected; collected data are analyzed; an analyzing result is output. Compared with the prior art, the method of automatic testing of the electric automobile charging facilities can conduct comprehensive testing on functional characteristics and performance indexes of an alternating current charging pile, a non-vehicle-mounted charger , a charger module and the like. Intelligentized centralized control is adopted, combination and batch execution of multiple testing projects can be achieved, a whole testing process can be executed by a centralized control platform automatically, and after testing is finished, a test report is generated automatically. A testing device can be used independently, and can be integrated to achieve systematic testing, and post-maintenance and post-calibration can be conducted conveniently. The method and the system of automatic testing of the electric automobile charging facilities can construct a fixed testing platform or a vehicle-mounted mobile testing platform.

The invention provides an intelligent home system. The system comprises an intelligent home network, the Internet and a dynamic domain name server. The intelligent home network comprises network equipment, a home server and a plurality of intelligent home terminals, wherein the network equipment is in communication connection with the Internet, the home server is in communication connection with the network equipment and is used for information interaction with the network equipment, receiving information sent by the intelligent home terminals and sending control signals to the intelligent home terminals so as to control the work of the intelligent home terminals, and the intelligent home terminals are in communication connection with the home server. The dynamic domain name server is in communication connection with the Internet and is used for receiving a dynamic IP (Internet Protocol) address sent by the network equipment through the Internet, binding the dynamic IP address to the fixed domain name of the intelligent home network, and carrying out domain name resolution. With the adoption of the intelligent home system provided by the invention, the functions, such as video surveillance, leisure and entertainment, intelligent control of household appliances and home environment monitoring, can be achieved, and the customized customization, assembly and association can be achieved; and the information security can be guaranteed because no external operation service platform exists.

The invention discloses a multi-circuit current-limiting power supplying circuit, a controlling method of the multi-circuit current-limiting power supplying circuit and a current-limiting power supplying method of the multi-circuit current-limiting power supplying circuit. The power supplying circuit comprises an alternating-current power source, a rectifier, a current-limiting switch circuit and a load. The wave form of the alternating-current power source is equal to that of a sine wave alternating current. The alternating-current power source is connected with an input end of the rectifier, and the rectifier comprises two output ends. The current-limiting switch circuit comprises three ends, a first end of the current-limiting switch circuit is connected with a first output end of the rectifier, a second end of the current-limiting switch circuit is connected with a second output end of the rectifier and one end of the load, and the other end of the load is connected with a third end of the current-limiting switch circuit. The power supplying method comprises the steps that full-bridge rectifying is conducted on the alternating current, wherein the alternating current is the sine wave alternating current; the alternating current supplies power to the load directly and an energy storage capacitor supplies powder to the load; when an alternating current voltage is less than a phase range of an energy storage capacitor voltage, the alternating current stops supplying power and the energy storage capacitor supplies power to the load. The multi-circuit current-limiting power supplying circuit, the controlling method and the current-limiting power supplying method have the advantages that power factor is high, efficiency is high, output flash frequency is improved and circuit is simple.

The invention discloses Au / ZIF-8-TiO2 catalyst and a preparation method and application thereof. The method comprises: adding a metal organic frame material ZIF-8 (zeolite imidazate-like frame material) made by a self-assembly process into a precursor of TiO2 to obtain ZIF-8 modified TiO2 carrier, and dispersing Au nanoparticles as an active ingredient to the surface of the ZIF-8 modified TiO2 carrier to obtain high-dispersion supported-type Au catalyst Au / ZIF-8-TiO2. By introducing ZIF-8, the activity for the catalyst to catalytically oxidize CO in visible light is improved, and the catalyst applies to CO removal at normal temperature in air or other occasions; the preparation method is simple and easy and is convenient to popularize and apply.

The embodiment of the invention discloses service network access platform and method, wherein the service network access platform comprises an interface encapsulating layer, a management function entity, a service logic execution environment and a protocol adaption function entity, wherein the interface encapsulating layer is used for encapsulating the service capabilities of a broadcasting television network, an interconnection network and a telecommunication network and interacts with a CP / SP (Content Provider / Service Provider); the management function entity is used for connecting with the interface encapsulating layer and carrying out service management according to a service request sent by the CP / SP; the service logic execution environment is used for converting the service capabilities of the broadcasting television network, the interconnection network and the telecommunication network and jointly releasing the converted service capabilities; and the protocol adaption function entity is used for converting an interface and a protocol and converting interface parameters and interface semantics. The embodiment of the invention can expose the internal complex capability of the broadcasting television network to a value added service developer through a simple, convenient and standard interface, thereby enabling the broadcasting television network to play greater roles in the convergence of three networks.

The invention provides a multifunctional health care composite material and belongs to the field of novel material. The composite material comprises, by weight, 50-100 parts of magnetic material, 5-20 parts of negative ion material, 5-20 parts of far-infrared material, 10-20 parts of germanite, 0.5-5 parts of coupling agent and 0.5-5 parts of epoxy resin. The preparation method comprises four steps of crushing, well mixing, magnetizing pressing mold and sintering. Prepared magnet or magnetic stripe can be used to inlay into articles for daily life, so as to enhance health care function of the articles. The invention has the following beneficial effects: the material has multiple health care functions to improve microcirculation, supplement trace element, inhibit bacteria and refresh; germanite is added into the material creatively to enhance health care efficacy; and the preparation method is simple, practical and beneficial for subsequent application.

The invention discloses a multi-source self-adaptive fault-tolerant federated filtering integrated navigation system and a navigation method. The system comprises a strapdown inertial navigation system, a satellite navigation system, a Doppler velocity measurement system, a celestial navigation system, and a main filter and three sub-filters that are in information connection with the systems respectively; the three sub-filters are all in information connection with the strapdown inertial navigation system, and are connected to the main filter through a fault detection and isolation module, the strapdown inertial navigation system is connected to the fault detection and isolation module through a state transmitter, and an output result of the fault detection and isolation module passes through an information sharing factor calculation module, then the calculation result is input into the main filter; and the main filter outputs the fused information and synchronizes a fusion result tothe three sub-filters and the state transmitter. According to the system and the method disclosed by the invention, the state of each sub-filter can be tracked more accurately, and a more precise fusion result can be obtained.

The invention provides a magic cube type modularization satellite which comprises a center rotating shaft and N<3>-(N-2)<3> magic cube blocks, and N is larger than or equal to 2. Each magic cube block is provided with an independent spacecraft functional module. The magic cube blocks comprise the face center magic cube blocks, the edge face center magic cube blocks and the corner magic cube blocks. First arc surface grooves are formed in the inner side faces of the face center magic cube blocks. The face center magic cube blocks are rotatably connected with the center rotating shaft through the first arc surface grooves. Second arc surface grooves are formed in the inner side faces of the edge face center magic cube blocks. The edge face center magic cube blocks are arranged around the face center magic cube blocks in a sliding mode through the second arc surface grooves. Third arc surface grooves are formed in the inner side faces of the corner magic cube blocks. The corner magic cube blocks are arranged on the corners among the edge face center magic cube blocks in a sliding mode through the third arc surface grooves. By means of modularization design, the combinations and replacement of modules with different functions are achieved, and the orientations of the magic cube block surfaces can be configured adaptively.

The invention relates to an anti-collision guardrail with internally inlaid metal materials, which comprises metal materials and a guardrail made of wood plastics or PVC or PP or PE or glass plastics or rubber materials, and metal materials are inlaid in a W-shaped anti-collision guardrail plate.

The invention discloses a rotary multi-way switching valve which is driven by a stepping motor and comprises an outer housing, a shaft, a rotor and a valve seat at the lower part of the rotor, wherein the rotor is sheathed on the shaft, a sliding blocks is arranged on the lower end surface of the rotor, the sliding block can rotate along with the rotor under the drive the stepping motor, valve ports communicated with inlet and outlet connecting pipes are arranged on a plurality of concentric circumferences of the upper end surface of the valve seat, at least two valve ports are arranged in the same radial direction, one or more valve ports are arranged on each circumference, at least two boss planes which have different radii and are matched with the corresponding valve ports and sealed are arranged on the axial bottom end surface of the sliding block, a pressure spring is arranged on the upper end surface of the sliding block, and the upper end of the pressure spring is sheathed in the lower end of the rotor. The rotary multi-way switching valve can simultaneously carry out switching control on a plurality of the valve ports when a valve core stays at a certain angle and realize the combination of various states of a refrigerant.

The invention relates to the technical field of underground engineering construction, and particularly relates to a device and a method for constructing a great depth rectangular or quasi-rectangular tunnel shield, mainly aiming at providing the great depth rectangular or quasi-rectangular tunnel shield which is applicable to a great-depth assembled mechanical construction for improving the safety reliability in the constructing process and accelerating the construction progress. The device mainly comprises a shield host, a back auxiliary and a model board trolley, wherein a combined rotating cutter is arranged at the front end face of the shield host, and a rectangular segment erector is arranged at the rear end of the shield host; a model board telescopic cylinder is connected on a supporting cantilever at the rear end part of the rectangular segment erector, and a model board is connected with and fixed at the other end of the model board telescopic cylinder; a grouting opening is reserved in the model board; and the model board trolley is arranged at the rear end of the back auxiliary. The construction device and method have remarkable economic benefits in underground space utilization and material utilization.

The invention discloses an electric transporting mechanism, which comprises guide rails, one or more than two transporting devices, traction devices and an electric control device, wherein the guide rails are double rails in parallel arrangement, guide grooves allowing the transporting devices to move are arranged on the guide rails, each transporting device comprises front and back wheels, a base plate and functional assemblies, the base plate is driven by the wheels, the functional assemblies are arranged on the base plate, the wheels and the guide grooves are matched, the front end and the back end of the base plate are respectively provided with connecting rings, the base plate is provided with positioning holes used for connecting the functional assemblies, the traction devices are respectively arranged at the two ends of the guide rails, a coiling disc used for collecting and releasing traction ropes and a traction motor used for driving the coiling disc to rotate are arranged in each traction device, one end of each traction device is connected with the connecting ring arranged on the transporting device through the traction rope, and the other end of each traction device is connected with the electric control device through the traction motor. The transporting mechanism is in automatic operation, the watering, the fertilization, the seeding, the pesticide spraying, the temperature regulation, the humidifying, the spraying and the sterilization can be efficiently, fast, conveniently, regularly and quantificationally completed, and the agricultural and standardized operation is realized.

The invention discloses a power-saving display method of a portable intelligent terminal, which is characterized in that a display panel of the portable intelligent terminal is divided into two or more display areas through physical division or virtual division; in a power-saving mode, through changing the drive mode of a row driver or a line driver, only part of the display areas are lightened for displaying outputs so as to reduce the power consumption of the display panel; meanwhile, the invention also discloses a power-saving display device of a portable intelligent terminal, which comprises a display controller, a row driver, a line driver and a display panel, and the power-saving display device is characterized in that the power-saving display device is divided into two or more display areas through physical division or virtual division; and the power-saving display device also comprises a mode switching module, the mode switching module is used for setting lightened display areas, driving the display controller, and then controlling and configuring drives of the row driver and the line drive to the display panel, so that a corresponding display area is lightened, and a display output complying with the display area is formed.

The invention relates to the technical field of electronic equipment and discloses a camera module, an image pickup device and a mobile terminal. The camera module comprises a lens, a bracket which receives and fixes the lens, an infrared filter at the bottom of the lens, a photosensitive chip which is attached to one side of the infrared filter back to the lens and a flexible circuit board which is electrically connected to the photosensitive chip. The photosensitive chip comprises at least two photosensitive areas, in the at least two photosensitive areas, at least one photosensitive area is a color film plating process, and at least one photosensitive area is a non color film plating process. The photosensitive chip is packaged on the flexible circuit board and is connected to the flexible circuit board through a chip signal pin introduced from each photosensitive area. The embodiment of the invention provides the camera module, the image pickup device and the mobile terminal, the combination of multiple photographing functions can be realized, and the photographing effect is improved.

The invention discloses a folding culture net cage, belonging to the field of culture devices. The folding culture net cage comprises a net cage frame connected with a net, wherein the axis of the netcage frame is provided with a floating column; the upper and lower ends of the floating column are respectively provided with a slip ring which is connected with the net cage frame through floating bridges; the floating bridges on the upper and lower ends are connected through balanced connecting rods; and the side surface of the net cage frame is provided with a net opening sealing mechanism. The culture net cage disclosed by the invention can change the culture capacity and enhance the culture output, has the advantages of high culture safety, high wind wave resistance and high catching efficiency, and can be assembled in the culture region.

The invention discloses a computer-aided overhaul simulation system for large and medium refrigeration and air-conditioning engineering, which comprises a computer, an I / O input / output module, an electronic switch driving module and an electric control circuit fault simulation module of a large and medium refrigeration and air-conditioning system, wherein the fault simulation module comprises the electric control circuit of the large and medium refrigeration and air-conditioning system and a fault electronic switch arranged in each arranging point of the control circuit; and the computer sequentially drives each fault electronic switch to be turned on and turned off through the I / O input / output module and the electronic switch driving module. In the invention, each fault electronic switch is controlled to be turned on and turned off by compiling software for the computer, fault setting and removal of the electric control circuit of the large and medium refrigeration and air-conditioning system are realized, and the electric control circuit of the large and medium refrigeration and air-conditioning system in the fault simulation module is the same as or similar to a real circuit. Training and examination contents are determined by the computer software, the examination results are automatically assessed by the computer, information management of the setting and removal of the faults is carried out by the computer, and the examination is just, fair and efficient.

The invention discloses an offshore-floating-type wind power generation and fishing net cage culture mixed-type platform, and relates to the field of wind energy utilization. The offshore-floating-type wind power generation and fishing net cage culture mixed-type platform is in a regular pentagon layout and comprises fans, a central vertical column, vertex vertical columns, a buoyancy compartment,fixed fishing nets, retractable fishing nets, a control chamber and supporting rods; each vertex vertical column is arranged at the corresponding vertex of a regular pentagon, the central vertical column and the buoyancy compartment are arranged at the central point of the regular pentagon, and the buoyancy compartment is directly connected to the lower part of the central vertical column; everytwo adjacent vertex vertical columns are connected through the corresponding supporting rods, and the vertex vertical columns and a central buoy are connected through the supporting rods; the controlchamber is located on the upper part of the central vertical column; the i vertex vertical column serves as a mooring vertical column, and the two fans are arranged on the upper parts of the (i-1) vertex vertical column and the (i+1) vertex vertical column, wherein i is larger than 1 and smaller than 5; and the fixed fishing nets are arranged at the periphery and the bottom of the platform, and the retractable fishing nets are arranged between the central buoy and the vertex vertical columns. The stability of floating-type wind power generation and fishing culture fusion is improved.

The invention discloses a multi-energy complementary heat supply system applied to an independent heating supply system. The multi-energy complementary heat supply system comprises a heat supply unit, a heat storage unit and heat taking units. The heat supply unit comprises a solar heat collection system, an air source heat pump system and a gas heating water heater system, the heat storage unit uses a heat storage system with an upper coiled tube and a lower coiled tube, and the heat taking units are a domestic hot water system and a heating system respectively; the solar heat collection system is connected with the lower heat exchange coiled tube of the heat storage system with the upper coiled tube and the lower coiled tube; the air source heat pump system is directly connected with a water inlet-outlet port in the middle part of the heat storage system with the upper coiled tube and the lower coiled tube; the domestic hot water system is connected with an upper water inlet-outlet port and a lower water inlet-outlet port of the heat storage system with the upper coiled tube and the lower coiled tube through a gas heating water heater; and the heating water system is connected with the upper heat exchange coiled tube of the heat storage system with the upper coiled tube and the lower coiled tube through the gas heating water heater. The multi-energy complementary heat supply system disclosed by the invention uses many kinds of energy for realizing complementary heat supply, increases the heat efficiency of the system and the utilization efficiency of the energy, reduces the discharge of pollutants, and increases the integration degree of the device.

The invention relates to the technical field of communication and discloses a dual mode and dual standby terminal. The terminal comprises a first dual mode baseband chip, a second dual mode baseband chip, an application processor (AP) chip, a first clamping groove and a second clamping groove. The AP chip, the first clamping groove and the second clamping groove are connected with the first dual mode baseband chip and the second dual mode baseband chip respectively. The invention further discloses a method for achieving dual mode and dual standby. According to the dual mode and dual standby terminal and the method for achieving dual mode and dual standby, dual mode and dual pass standby can be achieved in any area, and two subscriber identity module (SIM) cards can be inserted into any clamping groove to be used in any mode.

The invention discloses a hybrid floating platform of offshore wind power generation and fishery net cage cultivation, and relates to the field of wind power utilization. The platform is a regular n-sided shape, wherein the n is an odd number. The platform comprises draught fans, a center stand column, peak stand columns, a floating cabin, a fixed fishing net, a retractable fishing net, a controlchamber and supporting rods. The peak stand columns are respectively arranged at each peak of the regular n-sided shape. The center stand column and the floating cabin are arranged at the center point. The floating cabin is directly connected below the center stand column to form a center float. The supporting rods are connected between the peak stand column and between the peak stand column and the center float. The control chamber is arranged above the center stand column. The connecting between one peak stand column and the center stand column is used as the symmetric axis, and the m draught fans are symmetrically arranged above other peak stand columns, wherein the m is no more than n-1, and m is an even number. The fixed fishing net is fixed to the circumference and the bottom of theplatform. The retractable fishing net is arranged between the center float and the peak stand columns. Stability of fusion of floating wind power generation and fishery cultivation is improved.

The invention discloses an air conditioner control method and device, a storage medium, an air conditioner and a remote controller. The air conditioner control method comprises the steps that mode switching commands used for conducting timing automatic switching on operation modes of the air conditioner are received, wherein according to the mode switching commands, the first operation mode, the set condition and the second operation mode are included; and according to the set condition, the air conditioner is automatically switched between the first operation mode and the second operation mode. Through the scheme, the defects that in the prior art, using is inconvenient, the health of human bodies is adversely influenced, and the user experience is poor can be overcome, and the beneficialeffects of being convenient to use, beneficial for the health of human bodies, and good in user experience are achieved.

The invention relates to the technical field of ceramic manufacturing, in particular to a medium-temperature snowflake glaze ceramic and a manufacturing method thereof. The medium-temperature snowflake glaze ceramic comprises a body, a bottom layer glaze and a snowflake glazing layer, wherein the bottom layer glaze and the snowflake glazing layer are sequentially arranged outwards from the body. The snowflake glazing layer is prepared from white ceramic particles, feldspar, waste glass, quartz, an opacifying agent, kaolin, barium carbonate and alumina. According to the medium-temperature snowflake glaze ceramic prepared through the method, snowflake particles can change according to the specifications of the ceramic and are uniform in distribution and high in three-dimensional sense; by means of cooperation of the bottom layer glaze and snowflake glaze of the glazing face, multi-color matching and combining of the bottom layer glaze and the snowflake glaze can be achieved; the white ceramic particles are introduced into the snowflake glaze to serve as a raw material, recycling of the waste can be achieved, and the production cost of the raw material is reduced; in addition, production technology of the medium-temperature snowflake glaze ceramic is simple, medium-temperature firing is carried out, energy is saved, the environment is protected, and social and economic benefits are achieved.

The invention discloses a beta-sitosterol type catechinic acid liposolubility antioxidant and a preparation method thereof. The preparation method comprises the steps that butanedioic anhydride and beta-sitosterol react; under the action of a coupling reagent, intermediate products react with catechinic acid with hydroxyl on benzene rings being protected till the reaction is completed; and obtained products are subjected to deprotection, and the beta-sitosterol type catechinic acid liposolubility antioxidant is obtained through posttreatment. The beta-sitosterol type catechinic has a very good liposolubility antioxidant function. The beta-sitosterol type catechinic has a very good antioxygenic property in grease. The beta-sitosterol type catechinic is low in price and suitable for industrialized production and application. Meanwhile, the preparation method for the beta-sitosterol type catechinic is simple in process, simple, practical and suitable for industrialized mass production.

The invention discloses a construction method for hoisting a novel phase modifier based on a portal frame and a Laoxinge device. Construction preparation and basic treatment are conducted; track beamsupports are arranged and reinforced; track beams are placed; the track beams are arranged in two columns on steel buttresses and fixed through bolts; a portal frame traveling mechanism is placed, anda portal frame is mounted; a hydraulic hoisting device is mounted and arranged; a hoisting device is perfected and debugged; a stator is unloaded and steered; the hydraulic hoisting device is arranged again; the stator is hoisted in position; and hoisting equipment is dismounted. The track beams are laid between a phase modifier base platform and a hoisted object, the Laoxinge device are matchedwith the portal frame to travel on the track beams, the effect that heavy objects are hoisted in position in factories without heavy hoisting equipment in a narrow space is achieved, vertical lifting,lowering, back-and-forth movement and rotation operation of the heavy objects can be completed, and the problems that in the prior art, assembled operation equipment is adopted for operation, the operation steps are cumbersome and complicated, the workload and labor intensity of personnel are increased, and the burden on enterprises is increased are solved.

The present invention discloses one attenuated vaccinia virus Tiantan plant carrier and its preparation process and application, and the attenuated vaccinia virus is high attenuated TT.WHU.ZCI, CCTCC: V200417. The preparation process includes the following steps: A. constituting shuttle plasmid containing flanking sequence homogenous with the coding region sequence or coding region lateral sequences of the vaccinia virus Tiantan plant HA gene, or containing flanking sequence homogenous with the promoter sequence or lateral sequences of the vaccinia virus Tiantan plant HA gene; and B. homogenously recombining the shuttle plasmid and the vaccinia virus Tiantan plant to deactivate vaccinia virus HA gene part for high attenuating the vaccinia virus Tiantan plant. The attenuated vaccinia virus Tiantan plant carrier is used in preparing vaccine for treating or preventing infectious diseases.

A mechanical multi-frame RF / infrared composite interference semi-physical simulation system includes a microwave anechoic chamber, a three-axle table, a table control system, a RF interference simulator, an infrared interference simulator, a mechanical multi-frame moving system, a servo system, and an integral real-time simulation control system. The three-axle table, the table control system, the RF interference simulator, the infrared interference simulator, and the mechanical multi-frame moving system are arranged inside the microwave anechoic chamber, and the integral real-time simulation control system is arranged outside the microwave anechoic chamber. The RF interference simulator and the infrared interference simulator are mounted on a moving platform of the mechanical multi-frame moving system. The integral real-time simulation control system is composed of a multi-node real-time computer network including a master control computer, an acquisition computer, a RF interference control system, an infrared interference control system, a real-time communication network, a simulative master control system and a monitoring system. The real-time communication network is built up by the utilization of reflective memory networking, and information transmission and real-time control among devices of the simulation system are realized.

The invention discloses a modularized surgical robot capable of achieving single-hole and multi-hole conversion. The modularized surgical robot capable of achieving single-hole and multi-hole conversion comprises a plurality of surgical robot modules, the plurality of surgical robot modules can be independently arranged and cooperate to perform multi-hole mode operation, or the plurality of surgical robot modules are connected to a same guide arm to perform single-hole mode operation; each surgical robot module comprises a mechanical arm with multiple degrees of freedom, the mechanical arms are connected with a tail end executing mechanism, a poking card is arranged at the bottom of the tail end executing mechanism, and a butt joint mechanism is arranged at the top of the tail end executing mechanism so as to be connected with a guide arm.

The invention discloses a preparation method of a high-toughness biomimetic structured graphene-based ceramic composite material. The preparation method comprises the following steps: preparing layered porous ceramic blank body by adopting an electrostatic field freeze-drying method, treating by a vacuum infiltration process to make graphene to be completely impregnated into pores of the prefabricated blank, carrying out microwave sintering in the inert gas protection, crystallizing graphene and coating the ceramic crystal surface with graphene crystal to form the microscopic continuously distributed layered shell-like graphene-based ceramic composite material. Compared with traditional ceramic materials, the composite ceramic material has high density and fracture toughness; with excellent performance of graphene, the thermal and electrical properties of the material are significantly improved. The preparation method has huge application value in the fields of transportation, architecture, aerospace, military and the like.