217results about How to "Troubleshoot out-of-sync issues" patented technology

This invention discloses a data buffer storing method and a system under cluster environment, in which, the method includes: a customer end sends a data calling request, a server enquires if there are data to be called in the loca buffer storage, if not, it enquires the database, if so, it judges if the buffer storage data are invalid, if not, it returns the data result to the customer end directly, if so, it enquires the database to return the result to the customer end and writes it in the buffer storage, therefore, it guarantees that the data result to the customer end by the server is the newest and the method will not break the character of cluster technology.

The invention provides a method and system for synchronously displaying images with the UHD resolution ratio. The method includes the first step of obtaining subimage signals corresponding to signal channels, wherein the subimage signals are image signals obtained through segmentation of image signals, requiring to be displayed, with the UHD resolution ratio, the second step of carrying out synchronization on read-write pointers, subjected to frame rate conversion processing, of the signal channels and read-write pointers, subjected to frame buffer processing, of the signal channels, and processing the subimage signals according to the synchronized read-write pointers, and the third step of carrying out image merging on the processed subimage signals of the signal channels and carrying out display on a tiled display device. Through the method and system, the synchronous display of the images with the UHD resolution ratio is achieved, and cost is reduced.

The invention discloses a method for realizing scene control of a plurality of sets of wireless controlled equipment. The method comprises the steps of allocating a scene ID and a scene parameter to s scene by a scene editor; binding on scene terminal equipment; starting scene execution, transmitting a scene execution instruction, simultaneously determining whether a scene is executed, if yes, suspending the current scene and storing a scene ID, and setting a suspending mark; transmitting a scene broadcast execution instruction by an intelligent household gateway; determining whether execution is required by terminal control equipment, and performing operation according to a determined result; inquiring the state of the terminal control equipment by the intelligent household gateway; and after the intelligent household gateway finishes inquiring, transmitting a scene ending command by the intelligent household gateway, and inquiring whether a scene which executes the suspending mark exists, if yes, inquiring the state of suspended scene equipment, and uploading the equipment state. The method has functions of settling a problem of realizing execution synchronization of multiple sets of equipment in the scene; realizing no waiting in scene switching and execution and scene binding in an execution process, and improving user experience to the scene.

The present invention discloses a robot 3D repeated positioning precision test system. The system is characterized in that the system comprises a reflector, sensors, brackets, a controller, a vertical column, and a base, the reflector is rigidly connected to a robot end and moves and rotates with the robot end, three sensors are fixed to three brackets in a direction of pairwise orthogonal and three laser beams are projected to the reflector at the same time, the brackets are reliably fixed to the vertical column and are responsible for positioning and fixing the sensors, and the controller is arranged at one side of the vertical column. The sensors are laser displacement sensors with an external trigger function, the controller is formed by a collector, a cache, a processor, a trigger, a display device, and a communication interface, the synchronous acquisition of three-dimensional coordinates can be realized, and a synchronization error is avoided. At the same time, the invention discloses a calibrator and a corresponding sensor azimuth calibration method.

The invention relates to an auction bidding system based on a distributed non-blocking asynchronous message processing mode and an operation method thereof. The auction bidding system comprises an nginx server, a node server, a Tomcat cluster, a message queue, a bidding logic processing module cluster, and an Oracle database. A user initiates a request through a user terminal, and sends the request to the Tomcat cluster through the nginx server. The Tomcat cluster converts the request into a message, saves the message to the message queue, and gives a feedback to the user for response, wherein the feedback is used to remind the user that the request has been received and is being processed. The bidding logic processing module cluster processes the message in the message queue, and notifies the user of the processing result through the node server.

The invention discloses an unequal interval federated filter method based on dynamic information distribution, belonging to the technical field of aircraft integrated navigation. The method comprises the following steps: firstly, establishing a fused reset mode federated filter of an aviation vehicle-loaded inertial navigation system and other navigation systems, then constructing an unequal interval federated filter by the combination of the different characteristics of data updating frequency of a practical sensor, and finally, establishing the dynamic information distribution-based unequal interval federated filter based on the number of effective local sub filters, a system covariance matrix, and the information distribution factors of a dynamic observable degree calculating filter. According to the method, under the condition of hardly increasing the extra calculating burden, the sub filters are reset according the number of the effective local sub filters, the system covariance matrix and the information distribution factors of the dynamic observable degree calculating filter, the information of different measuring periods is optimally fused, the information distribution efficiency and information distribution performance of the federated filter calculation method can be improved, and the method has a certain practical value.

The invention relates to the research field of the road traffic safety, which discloses an integrative monitoring system of the automobilism action of a driver. The integrative monitoring system comprises a CAN bus, a server, a microwave radar distance measurement module, an infrared laser scanning module, a braking pedal stroke measurement module, a steering wheel turn angle test module, a vehicle motion state measurement module, a driveway identification module, a driver eye motion measurement module and an environmental monitoring module, wherein the server is hung and connected on the CANbus, and the driver eye motion measurement module and the environmental monitoring module are respectively accessed into the server by network lines.

The invention discloses a GPS synchronization method of a distributed testing system. The problem that the distributed testing systems are hard to be mutually synchronized since the independent working of each testing point causes the physical dispersion and isolation in the transient signal testing is solved by use of the method oriented to an application of the current mainstream distributed testing system. The method comprises the step of precisely measuring a time difference between a PPS pulse signal produced by a designed GPS synchronization unit and a received tested signal, wherein the time differences respectively measured by the testing points and the UTC time are upload to a computer so as to establish the time unification taking the PPS pulse as the standard on the computer. The GPS synchronization unit designed by the invention comprises a GPS timing module, a control chip FPGA and high-precision clock source, an EEPROM memory, and a USB interface. The GPS synchronization method disclosed by the invention is suitable for the synchronization of the distributed testing system under the outdoor open environment. The prominent problems of low reliability and high work amount in the wire synchronization are solved in a wireless synchronization method; the method is high in precision, simple in operation and easy for engineering realization.

The invention discloses a water tank jacking mechanism. In the prior art, the water tank is commonly jacked by double cylinders or multiple cylinders, faults easily happen, and adjustment is relatively difficult after the faults happen. The water tank jacking mechanism comprises a cylinder jacking part, a water tank support frame four cylindrical guide rails, four adjustable guide wheels and a peripheral rack. A rectangular groove as large as the water tank is arranged at the geometric center of the upper bottom surface of the water tank support frame; two parallel and symmetrical rectangular bars are arranged on the lower bottom surface of the water tank support frame; a support plate is arranged on the lower sides of the two rectangular bars; a cylinder mounting seat is fixedly mounted at the tail of a jacking cylinder; a jacking head of the jacking cylinder is movably connected with the support plate; adjustable pulley brackets are fixedly mounted at four vertex angles of the lower bottom surface of a rectangular plate; and pulleys are arranged on the adjustable pulley brackets, and connected with the cylindrical guide rails mounted on the peripheral rack in a matching manner. The jacking mechanism avoids high possibility of a locking failure of a linear bearing structure, and is easy to maintain.

A system clock reference is transmitted to user devices (1, 2, 3) over a short range communication channel (40) and used to calculated a clock offset. The clock offset is stored together with a user identifier in a server memory (15), from which the clock offset can be retrieved when receiving the user identifier together with a video stream (21, 22, 23) of video frames (31, 32, 33) tagged with respective timestamps. The timestamps are converted into capture times according to a system clock (17) using the retrieved clock offsets. Video streams (21, 22, 23) from multiple user devices (1, 2, 3) thereby have video frames timestamped using a same clock reference and can be time aligned.

A VLC signal representing an alignment identifier is detected by cameras (4) of multiple user devices (1, 2, 3) filming a scene. Encoded video frames (91, 92, 93) from the user devices (1, 2, 3) are decoded and light patterns representing the captured VLC signal are identified in at least some of the video frames following decoding. The light patterns are decoded into alignment identifiers that are used in order to time align video frames (91, 92, 93) from different user devices (1, 2, 3) to thereby achieve video frame synchronization of video data from multiple user devices (1, 2, 3) recording a scene. The embodiments thereby enable video frame synchronization without the need for accurate clock synchronization between the user devices (1, 2, 3) and a video synchronization system (10).

The invention discloses a liquid crystal panel driving circuit, a liquid crystal display device and a driving method. The liquid crystal panel driving circuit comprises at least two signal input interfaces, a time sequence control module, a storage module and a data processing module. When the storage module receives frame data of one same display frame of all the signal input interfaces, the data processing module reads the frame data from the storage module and transmits the frame data to the time sequence control module which then drives a liquid crystal panel. The liquid crystal panel driving circuit solves the problem in the prior art that frames are not synchronous, and can improve display quality.

The invention discloses a feature invariant based remote sensing image watermark method which is directed at overcoming the incompatibility between anti-geometric attack and anti common image processing attack of the DCT algorithm and at the same time fully exhibits the advantages of 2D code, such as large storage information amount and strong error correction. The method includes the following steps: looking for invariants in 8 x 8 subblocks converted by the DCT algorithm, calculating embedded watermark information bits by using a mapping function in combination with the invariants, marking an initial position of each 8 x 8 subblock with intermediate frequency coefficients. In the process of watermark detection, image blocks containing watermark information can be located in a rapid and accurate manner through the determination of a feature location region. According to the invention, features of pixel digital numbers of remote sensing images before and after the geometric attack are fully utilized to address the problem of desynchrony of watermark information, which substantially increases robustness of the DCT algorithm, addresses the problem of inability of current remote sensing image digital watermark algorithm to resist cropping attacks, and effectively protects copyright of remote sensing image data.

The invention discloses a wireless sensor network data acquisition method and system based on broadcast synchronization, and the method specifically comprises: a host node broadcasting synchronizationheaders to all network sensor nodes, and the network sensor nodes carrying out the calibration of respective sampling timers according to the time calibration information; determining or updating therespective sampling rate according to the query period and the respective sampling rate; according to the time slot distribution information, packaging the sampling data according to a sampling timesequence and sending the sampling data to a host node in a datagram form; and the host node analyzing the content of each datagram, reproducing the data of each network sensor node, and transmitting the data to a comprehensive control computer or a remote measurement system. Whole network management and data collection are realized by adopting the host broadcast message, the method is simple and reliable, the data synchronization precision is high, the data reported in each period are equal in length, the hardware processing is convenient, the sampling rate can be dynamically changed, and theproblems in the prior art are solved.

The invention discloses a method and a system for synchronously watching videos and interacting , which are used for solving the problems that pictures of the same video watched by multiple users in real time are difficult to synchronize and the real-time interaction of the multiple users is difficult when the multiple users watch the video, and the method for synchronously watching videos and interacting in real time by the multiple users comprises the following steps that: the user creates a studio and sets a playing performance level and a playing priority guarantee strategy of the studio;a creator can invite other user terminals to join in the studio and set a playing video; an invited user terminal automatically adjusts the playing quality level of the terminal and automatically controls the elimination terminal; the creator sets different real-time synchronization instruction operation authorities for other user terminals; the user can control the synchronous playing of the video within the authority range; synchronous playing of terminal videos is accurately controlled through synchronous control and a real-time feedback algorithm; all synchronous users can perform real-time interaction in the form of characters, voices, videos, barrages or expressions.

The invention discloses a method and a system for realizing a Bluetooth subwoofer for televisions. The method comprises the following steps: when a Bluetooth subwoofer is connected with a television, original sound output of the television is retained, and the current volume value is sent to the Bluetooth subwoofer in real time; the Bluetooth subwoofer sends the crossover point frequency of the Bluetooth subwoofer and a television speaker to the television, and the frequency response curve characteristic of the television is adjusted after the television receives the crossover point frequency; and the rated output power of the Bluetooth subwoofer is determined according to the frequency response curve characteristic of the Bluetooth subwoofer and the rated output power of the television, and the current output power of the Bluetooth subwoofer is adjusted according to the current volume value of the television. According to the invention, through improvement on the process of connection between the Bluetooth subwoofer and the television, volume adjustment of the Bluetooth subwoofer and volume adjustment of the television are synchronized, and power and frequency response matching is realized automatically according to different television sizes. In addition, the problem that Bluetooth sound and picture are not synchronized is solved through the adoption of a low-latency Bluetooth data packet format.

The application provides a processing method and a processing device for SGW (Serving Gateway) redirected X2 switching, wherein the method comprises: a process of conversation deletion between an MME (Mobility Management Entity) and a Source SGW, and a process of position update between UE (User Equipment) and the MME; under the condition that a timer has no overflowing, the process of the conversation deletion between the MME and the Source SGW and the process of the position update between the UE and the MME comprises the steps that: the MME receives a Tracking Area Update Request message sent by the UE; the MME replies the Tracking Area Update Request message to the UE, and sends a Delete Session Request message to the Source SGW; the UE receives a Tracking Area Update Accept message, and then replies a Tracking Area Update Complete message to the MME; and the Source SGW replies a Delete Session Response message to the MME after receiving the Delete Session Request message. The application can improve the switching success rate and the switching efficiency, and promote the user experience.

The invention relates to an electrical control device for a crawler-type counter weight trolley, comprising a main machine control component arranged on a main machine of a crane and a counter weight trolley control component arranged on a counter weight trolley of the crane, wherein the main machine control component comprises a right main machine crawler travelling motor rotating speed sensor, a left main machine crawler travelling motor rotating speed sensor, a main machine controller and a main machine rotation angle displacement sensor; the counter weight trolley control component comprises a right counter weight trolley crawler travelling motor rotating speed sensor, a left counter weight trolley crawler travelling motor rotating speed sensor, a counter weight trolley controller anda counter weight trolley rotation angle displacement sensor; and the main machine controller and the counter weight trolley controller are connected to communicate by virtue of a CAN bus. By adoptingthe electrical control device provided by the invention, synchronous control on the main machine and the counter weight trolley is realized, and actions of the main machine and the counter weight trolley are combined to generate diversified operating modes, thus the automation strength is improved, the lifting capacity is improved, a counter weight is convenient to move, and the problem that desynchronization is caused by adverse impact of personal factors can be avoided.

The invention provides a networking method for stepping variable-frequency radar communication integration. The networking method includes that different radars are differentiated according to difference of communication signals and stepping variable-frequency signals, difference in stepping variable-frequency signals among the different radars is quite small, the stepping variable-frequency signals is a low-frequency single-frequency signal after frequency mixing, and carrier frequency of the communication signals is relatively high, so that communication information and radar information can be demodulated through different filters; distance among the different radars is measured by utilizing a bidirectional communication time method, distance measuring result is transmitted through the communication information, and a radar communication integration network on the basis of radar relative position is set up finally.

The invention discloses a method, a device and a system for synchronously playing a message stream and an audio and video stream, and belongs to the technical field of streaming media live broadcast.The method comprises the following steps that a stream pulling end pulls the audio and video streams from an audio and video server and plays the audio and video streams; a message stream is pulled from a message server and cached, an audio and video timestamp is added to each audio and video frame in the audio and video stream, a message timestamp is added to each message in the message stream, and time sources taken by the audio and video timestamps and the message timestamps are synchronous time sources; and the stream pulling end determines a message synchronously played with a to-be-played audio and video frame in the cached message stream based on the audio and video timestamp of the audio and video frame and the message timestamp of the message, and plays the message. According to the invention, the synchronous playing of the audio and video streams and the message streams can be realized, and the interaction and experience effects of online live broadcast education are improved.

The invention relates to the technical field of video synchronization. The invention relates to a video synchronization method and system, in particular to a distributed cross-node video synchronization method and system. The method comprises the following steps: when a video signal needs to be subjected to cross-screen window display, according to an image cutting area of a node corresponding toa cross-screen window and a display window area of the node corresponding to the cross-screen window, carrying out cutting and scaling processing on decoded frame data corresponding to the cross-screen window to obtain cut and scaled frame data; superposing the plurality of cut and scaled frame data according to superposing reference time to obtain frame data of the cross-screen window; setting the timestamp of the frame data of the cross-screen window after superposition processing as superposition reference time, and caching the superposition reference time into a display queue for display;According to the display sending reference time, adopting a single thread to carry out display sending processing on the frame data in the display queue. According to the distributed cross-node videosynchronization method and system, the cross-node video synchronization effect can be obviously improved.

The invention relates to the technical field of printing, and provides a printing data processing method and system. The method comprises the following steps: applying for a buffer area between every two processing threads, controlling the first processing thread to carry out color processing on a printing data file, storing the processed printing data into a storage unit of the first buffer area through an inlet pointer of the first buffer area, controlling the second processing thread to read the printing data in the storage unit through an outlet pointer of the first buffer area, and meanwhile, controlling the second processing thread to perform the same processing operation as the first processing thread on the read printing data until the (N+1)th processing thread, wherein the (N+1)th processing thread carries out color data processing on the printing data and outputs the processed printing data. The running thread processing mode solves the problem of non-synchronization due to different processing speeds of parallel threads, accelerates the printing data processing speed, and is also suitable for transmission of mass multipage data.