649results about How to "Realize seamless switching" patented technology

This invention discloses a method and a system for positioning switching between the indoor and the outdoor, a terminal and a positioning application platform, which relate to the mobile Internet field. The method comprises steps of collecting quantity of GPS visible satellites and RSSI of WIFI accessing points, reporting the GPS visible satellite quantity and RSSI of WIFI accessing points to a positioning application platform in order to provide convenience to the positioning application platform to determine what environment the terminal is positioned (outdoor environment, indoor environment and shielding environment) by combining the report information, choosing the corresponding positioning mode according to the environment where the terminal is positioned, and starting positioning by the terminal according to the positioning mode chosen by the positioning application platform. This invention realizes seamless switching between the indoor positioning and the outdoor positioning and improves the positioning success rate when the indoor environment or the outdoor environment changes.

The invention provides a server cluster system and a load balancing implementation method of the server cluster system. The system comprises a main node, a standby node and common nodes. The main node comprises an information collecting module, a load calculating module and a connecting and distribution deciding module. The standby node is used for reporting the information of the standby node to the main node, and synchronizes with the information of the main node, and the common nodes are screened, so that the selected common node is adopted as a new standby node after the common node becomes the main node. The common nodes are used for reporting the information of the common nodes to the main node, and when one common node becomes the standby node, standby node switching is carried out. Through the server cluster system and the load balancing implementation method, the server cluster system with the main node and the standby node of a mesh network is adopted, the structure of the main node and the standby node is utilized for achieving connection and distribution, the function of sharing connection is achieved, and the problems that connection and distribution delay, and connection is unstable and unreliable can be solved.

The invention provides a control method of a grid friendly type distributed power source based on hybrid energy storage. The method comprises the steps of optimally designing a topology structure of the distributed power source, controlling a direct current power supply system in a coordinating mode through a direct current (DC)/DC converter controlling a model normalization model, and self-adaptively controlling a grid of an alternating current (AC) side DC /AC converter. The distributed power source not only can be connected in a large grid to operate so as to reduce the influence of intermittent renewable energy power generation grid connection on the grid and provide support of voltage and frequency for the grid, but also can be connected into a micro-grid to operate as a network unit of the off-network type micro-grid to maintain stability of voltage and frequency of the off-network type micro-grid. When an outer grid breaks down, the distributed power source can realize switch between a grid mode and an island mode so as to improve power supply reliability of important loads in the system. The distributed power source improves technical performance and economic performance of the whole system through matching utilization of an energy type system and a power type energy storage system.

The invention discloses a multi-source fusion unmanned aerial vehicle indoor and outdoor positioning method and system. The system comprises a sensing layer and a decision making layer, wherein the sensing layer comprises a plurality of sensors, the decision making layer comprises a visual odometer system, a laser odometer system, an IMU odometer system and two multi-source fusion systems. IMU information is selected, relatively good initial gesture and gravity direction are provided, and the scale problem of a visual odometer and the inherent defect of scale drift are made up; high accuracy information of a laser radar and the visual odometer are fused, the motion estimation error is reduced, and the system robustness is improved; and with the addition of GPS absolute position correction, and an accumulated error of the system is further reduced. By the method, accurate positioning information can be generated according to true motion track of a vehicle, the positioning accuracy is high, indoor and outdoor seamless switching can be achieved, the positioning stability of the vehicle in an indoor and outdoor environment is improved, high robustness is achieved, and the system is suitable for indoor and outdoor positioning of a pilotless automobile in a large scene.

The invention relates to the field of operating systems, natural language processing technologies and of voice recognition technologies, and discloses a voice control device and method for a mobile terminal. The device comprises a control unit used for turning on and turning off the voice control device for the mobile terminal, wherein the control unit includes a suspension window; the suspension window is arranged on the uppermost layer of a mobile terminal user interface; and a user can input a command for turning on or turning off the voice control device for the mobile terminal to the control unit by operating the suspension window. The method comprises the following steps: a user inputs an on/off command to the control unit by operating the suspension window, and the control unit is used for turning on or turning off the voice control device for the mobile terminal according to the received commands.

The present invention provides a terminal and method that realizes the seamlessly switch between the IMS network domain and the CS domain network, It could conducted real-time detection of the network condition and switch the communication network when the switching strategy is satisfied. So the continuous conversation during the switch could be ensured. It would also provide technical support to IMS domain network that orients at a variety of access technologies and uses SIP as a session control protocol, and provide the effective technical guarantee for the further development of FMC.

The invention provides a wind power plant reactive voltage comprehensive control system and a wind power plant reactive voltage comprehensive control method. The system comprises a front-end processor subsystem, a network subsystem, a database subsystem, a reactive regulation module and a man-machine interface module. The wind power plant reactive voltage comprehensive control system receives a control objective delivered by a master station at regular time, carries out optimal balance adjustment on the reactive power of various reactive equipment according to the operating conditions and the reactive adjusting capacity of a fan, a SVC (static var compensator)/SVG (static var generator) and other reactive adjustable equipment and on the premises of meeting system stability and equipment safety, so that the requirement on voltage controllability is met, and the stability margin of a system is also improved.

The embodiment of the invention discloses a network switching method and apparatus, a terminal and a storage medium, and belongs to the field of network connection. The method comprises the followingsteps: establishing a first network connection and a second network connection, wherein the network connection modes of the first network connection and the second network connection are different; transmitting the network data of game application programs through the first network connection; performing a network quality test on the first network connection and the second network connection to obtain a network quality test result; and if the network quality test result indicates that the quality of the second network connection is better than the quality of the first network connection, switching to transmit the network data of the game application programs through the second network connection. The whole network switching process is automatically executed by the terminal, thereby simplifying the network switching procedures; and the network switching process generates no influence to the network data transmission, the blockage phenomenon in the switching process is avoided, and seamless switching between networks is achieved.

The invention discloses a system and method for realizing video seamless switching between multiple screens and belongs to the audio and video processing field. The system includes a first video playing terminal, a second video playing terminal and a screen switching server, wherein the first video playing terminal and the second video playing terminal are used for playing video files, and can perform screen switching operation on a currently-played video file, the first video playing terminal can switch the video file to the second video playing terminal so that the video file can be continuously played at the second video playing terminal, and the screen switching server detects and records equipment information and screen switching operation information to determine a time point when the second video playing terminal plays the switching-in frame of the video file. With the system and method of the invention adopted, seamless switching of media content from the screen of one terminal to the screen of the other terminal can be realized, and a user can freely and continuously switch a certain video between a plurality of screens for many times so as to complete watching the video.

The invention provides a switching method of a built-in antenna and an exposed antenna of an FM receiver as well as a corresponding terminal thereof. The terminal comprises an FM receiver, the built-in antenna, the exposed antenna, a CPU, a detection module and an antenna switching module. The CPU detects that the exposed antenna is switched in when the terminal switches in the exposed antenna inthe on-state of the FM receiver; the detection module is used for detecting the RSSI of signals received by the built-in antenna and the exposed antenna; the selection module is used for comparing the RSSI values of the signals received by the built-in antenna and the exposed antenna, which are detected by the detection module. The antenna with the larger RSSI value is selected, and then the CPU controls the antenna switching module to switch in the selected antenna as the current receiving antenna. The switching method performs a switching between the built-in antenna and the exposed antennaaccording to the quality of the signals received by the built-in antenna and the exposed antenna from a station, can realize a seamless switching between the built-in antenna and the exposed antenna,and raises the receiving quality and the effect of the FM receiver.

The invention discloses a full-electronic security computer interlocking system. The full-electronic security computer interlocking system comprises a special railway security computer, an interlocker, a control and display machine and an electronic executing unit subsystem, wherein the special railway security computer comprises two security computers as a master computer and a spare computer; each security computer comprises a CPU (central processing unit) board and multiple communication boards; data transmission and data synchronization between a first CPU module and a second CPU module of the CPU board are finished through a two-port RAM (random access memory) and interrupt operation; the CPU board and the communication boards in a same system exchange data through the two-port RAM and the interrupt operation; during system operation, the first CPU module and the second CPU module output control signals for driving a master relay; and a normally open contact of the master relay is used for controlling acting power of onboard safety relays of all the communication boards. By a working method of the full-electronic security computer interlocking system, the special railway security computer can achieve functional safety of a double 2-vote-2 platform, can achieve short-period task-level synchronization of a single computer and two computers, and can achieve seamless handover under fault conditions.

The embodiment of the invention discloses a multi-viewpoint video playing control method and device. The multi-viewpoint video can be stored in a cloud server for a video playing client to obtain. Themethod comprises the following steps of acquiring video stream data acquired based on each viewpoint according to a video stream address set corresponding to a multi-viewpoint video, the video streamdata being obtained by encoding video source signals acquired by each viewpoint based on a synchronous clock, playing the video stream data corresponding to the first viewpoint, when a viewpoint switching instruction is detected, determining a second viewpoint according to the viewpoint switching instruction, and positioning a starting video frame in the video stream data corresponding to the second viewpoint, the coding timestamp contained in the starting video frame being the same as the coding timestamp contained in the currently played video frame, and switching from the starting video frame to play the video stream data corresponding to the second viewpoint. According to the technical scheme provided by the embodiment of the invention, seamless switching of video pictures of different viewpoints can be realized, and multi-angle watching of the video is supported.

The invention provides a video definition switching method and a video player. The method comprises the following steps: loading a first fragment file of a first definition video from a preset second level buffer area into a video stream buffer area to be played; receiving a definition switching instruction; obtaining a configuration file of a second definition video from a video server according to the instruction, wherein the configuration file comprises time information and address information of each fragment file in the second definition video; determining a second fragment file conforming to a smooth switching condition in the second definition video corresponding to the first fragment file; loading the fragment files behind the second fragment file in the second definition video into the second level buffer area in sequence; and loading the fragment files into the video stream buffer area to start to play the second definition video after the first fragment file is played. The video definition switching method provided by the invention is used for realizing the seamless switch of different video definitions.

The invention relates to a novel software phaselock technique applicable to micro-grid master-slave control. In a master-slave control structure of a micro-grid, a micro-grid master control inverter tracks the phase of a power grid while in grid-connected operation; and when in isolated island operation, the micro-grid master control inverter needs to maintain the system frequency to be unchanged; to ensure that the phase and the frequency of a voltage do not change suddenly during the micro-grid mode switching process, the invention provides the novel software phaselock technique; when the connected grid is changed to the isolated island mode, the phase of the power grid is locked; and an output phase after the grid is disconnected transits from the power grid phase to the micro-grid phase gradually, and no phase jump happens; when the isolated island mode is changed to the connected grid, a phase difference of the power grid and the micro-grid is firstly calculated, and subsequently the PI modulation is carried out on the phase difference; the output is used as a frequency compensating signal to be overlapped with the frequency under the isolated island mode and to be used as frequency reference of an output voltage of the micro-grid main control inverter; and by changing the frequency, the phase of the micro-grid main control inverter is enabled to approach to the phase of the power grid slowly; and when the phase difference of the micro-grid main control inverter and the power grid is less than a set value (theta0), the grid connection operation is carried out.

An uninterruptible power supply comprises an energy storage battery, a monitoring circuit, a controllable switch, a grid-connected control circuit, an off-network control circuit, a mode changeover switch and a converter, wherein the grid-connected control circuit comprises a harmonic and reactive current extraction circuit and a current ring control circuit, and the off-network control circuit comprises a voltage outer ring circuit and a current inner ring circuit. When the above uninterruptible power supply is in grid connection, the grid-connected control circuit extracts a harmonic and reactive compensation instruction signal according to harmonic and reactive components in a mains supply and carries out reactive and harmonic compensation through current closed-loop control so as to reduce electric energy loss; the off-network control circuit does not take participate in controlling in a grid-connected mode while still is in a running state, and an off-network control signal can be generated according to a given voltage value of a voltage ring, an output voltage feedback signal and an output current feedback signal; and when the system is switched to an off-network mode from a grid-connected mode, the converter controls the output according to the off-network control signal so as to achieve seamless switching between the grid-connected mode and the off-network mode. The invention also relates to a control method of an uninterruptible power supply system.

The invention discloses a method, a device and a system for session information synchronization. The method comprises the following steps: A. when a primary device in a high availability system determines that the heartbeat and an engine of the primary device and a backup device are normal, establishing user data packet protocol (UDP) connection with the backup device; B. synchronizing the session information chosen from the session information in self-maintenance and the session information generated in real time to the backup device; and C. according to the received confirmation information fed back from the backup device, turning to the step B after determining that the backup device receives the chosen session information. According to the scheme, a data structure can be accurately and reliably sent to the backup device, thereby realizing seamless switching and prolonging the continuous operating time of a network security system.

The invention discloses a communication switching method and system of NB-IoT equipment. The method comprises the steps that: when the NB-IoT equipment detect a condition that an NB-IoT network is offline, a GPRS search network registration process is started to access a GPRS network, and position information is sent to a system server through the GPRS network; a position server receives the position information forwarded by the system server, whether the preset range of a position where the NB-IoT equipment is located has a NB-IoT base station is judged according to the position information, and notification information is sent to the system server when the preset range of the position where the NB-IoT equipment is located has the NB-IoT base station; when the system server receives the notification information, an NB-IoT starting instruction is sent to the NB-IoT equipment; and when the NB-IoT equipment receives the NB-IoT starting instruction, an NB-IoT search network registration process is started to switch to the NB-IoT network. The seamless switching between the NB-IoT network and the GPRS network is realized, the global network coverage of NB-IoT equipment can be almost achieved, the low power advantage of the NB-IoT equipment is maintained, the NB-IoT equipment can be always online, and the stability and reliability of NB-IoT are improved.

The invention provides a control system for a dual-redundancy electric steering engine. The control system comprises a first motor and a second motor for power input of a differential epicyclic gear train speed reducer for controlling the steering engine, a first position sensor and a second position sensor used for acquiring motion state of the steering engine, and a first digital control unit and a second digital control unit used for respectively receiving signals of the first position sensor and the second position sensor, the first motor and the second motor are respectively provided with a first brake and a second brake, the first brake and the second brake are respectively connected with output terminals of the first digital control unit and the second digital control unit, the first digital control unit and the second digital control unit respectively send control signals to the first motor and the second motor via a first inverter and a second inverter, the first inverter and the second inverter are respectively provided with a first bridge current sensor and a second bridge current sensor used for transmitting bridge current sampling signals to the first digital control unit and the second digital control unit, the first digital control unit and the second digital control unit respectively receive steering instruction signals for controlling a computer via a CAN bus interface, the first digital control unit and the second digital control unit are mutually connected and communicate with each other, and the first digital control unit and the second digital control unit are heat backups to each other.

The invention discloses a zookeeper-based cloud platform service hot backup method. The method comprises the following steps that: a plurality of same services request a zookeeper service to create temporary sequence nodes in a same znode path; the zookeeper service receives a request to respectively create nodes for each service, and allocate serial numbers to all nodes in a monotone increasing sequence; a plurality of services respectively judge whether the serial number of the nodes created by own request is minimal in the same znode path; if so, the service is a master service, and otherwise, the service is a backup service; when the master service fails, the zookeeper service deletes the nodes created by the request of the master service from the same znode path, and the backup service judges whether the serial number of the nodes created by the own request is minimal in the same znode path; and if so, the service is a new master service. According to the method provided by the invention, after the master service fails, the backup service can generate the new master service, and the seamless switching is realized, so that the time of service interruption is shortened.

The embodiment of the invention discloses a communication network switching method and device, electronic equipment and a storage medium. The method for switching a communication network from a groundmobile communication network to a satellite mobile communication network comprises the steps that the current position of a terminal is acquired, and the current positions of satellites in a satellite mobile communication network are acquired; a plurality of satellites closest to the terminal are determined according to the current position of the terminal and the current positions of the satellites; a control terminal measures the signal intensity of the plurality of satellites, and determines the satellite with the highest signal intensity in the plurality of satellites as a target satellite to be switched; and reserved uplink channel information of the target satellite is acquired, and a network switching request signaling carrying a target satellite identifier and the reserved uplinkchannel information of the target satellite is initiated to the terminal. According to the embodiment of the invention, seamless switching of the terminal between the ground mobile communication network and the satellite mobile communication network can be realized, and the stability and continuity of terminal service can be improved.

The invention relates to a micro-grid system, which comprises a storage battery, an energy storage converter, a monitoring circuit and a controllable switch. When the micro-grid system is in a grid-connected mode, the energy storage converter outputs a constant power under the control of an inner current loop unit; an outer voltage loop unit does not participate in the control in the grid-connected mode, but is still in an operating state; and the outer voltage loop unit estimates a given current loop signal in advance when the micro-grid system is switched into an island mode from the grid-connected mode according to four input signals of the outer voltage loop unit. When the micro-grid system is switched into the island mode from the grid-connected mode, the outer voltage loop unit is put into operation, and the inner current loop unit controls output voltage and frequency of the energy storage converter to be constant according to the given current loop signal which is estimated in advance and output by the outer voltage loop unit. According to the micro-grid system, the outer voltage loop unit controls the output given current loop signals to be the same before and after the mode is switched, so that seamless switching of the grid-connected mode or the island mode can be achieved. The invention further relates to a control method for the micro-grid system.

The embodiment of the invention provides a handlingmethod for switching driving modes of a rail transit train. The method comprises the steps of acquiring status information of the train after the train enters a common management area, wherein the common managementarea is an overlapping area of different operation systems of the train; obtaining a second driving mode of a to-be-switched operationsystem corresponding to a first driving mode of a current operation system of the train according to the status information of the train and preset triggering conditions; if the confirmation action ofthe second driving mode of the to-be-switched operation system is received, switching the first driving mode to the second driving mode. The handling method for switching the driving modes of the rail transit train acquires the second driving mode corresponding to the first driving mode of the train through the status information of the train and the preset triggering conditions, and achieves seamless switching between the driving modes of the train operation systems, so that manpower maintenance costs are reduced, and management efficiency of train operation is improved.

The invention discloses a method, a communication system and a related device for seamless fusion of multi-network IP (internet protocol) business flows. In order to implement the function of IFOM (IP flow mobility) of UE (user equipment) based on IPv4 (IP version 4), an HA (home agent) is discovered by a mobile anchor point agent UE; the mobile anchor point serves as an agent of the UE according to a strategy and network condition by using a signal of DSMIPv6 (dual-stack mobile IPv6) to interact with the HA, and total or partial business flows of the UE in a first network are unloaded to a second network; and support requirements of the UE for the DSMIPv6 are shifted up to the mobile anchor point on a network side, seamless switching of business flows among networks can be achieved without upgrading a traditional terminal of an existing network, and accordingly network compatibility is increased, mobile support among networks is provided when business continuity is guaranteed and perfect fusion of the networks is achieved.

The embodiment of the invention provides a data interaction method and method. The method may comprises the following steps of: invoking the API (Application Programming Interface) of a social network to send a data acquisition request to the social network when a third-party application detects a trigger operation for the social network; obtaining requested data by the social network according to the data acquisition request, and returning the data to the third-party application for processing; and sharing the processed data to the social network through the API of the social network by the third-party application. The method is capable of performing seamless switching between the social network and the third-party application, simplifying the data interaction operation and improving the data interaction efficiency.

The invention discloses a method for transmitting panoramic videos. The method comprises the following steps: splitting panoramic videos to be transmitted into viewing angle data corresponding to areas of different angles, and numbering the panoramic videos and the viewing angle data; allocating corresponding transport stream (TS) IDs and program numbers to the viewing angle data of the panoramic videos respectively, wherein different viewing angle data of the same panoramic video correspond to different TS IDs; and transmitting the viewing angle data of the panoramic videos on TSs identified by the TS IDs according to the TS IDs corresponding to the viewing angle data, and carrying corresponding panoramic video numbers and viewing angle numbers corresponding to the TS IDs and the program numbers of the viewing angle data in a PAT (Port Address Translation) table transmitted to a receiving end. Through adoption of the method, the transmission efficiency of the panoramic videos can be increased.