914results about How to "Solve the loss" patented technology

The invention discloses a block chain key management system and method. The system is provided with a transaction access device at a client end, is provided with a logic processing device, a secret key management device and a digital signature device at a server end, and is provided with a digital signature verifying device and a block chain device at a block chain end. Compared with a conventional block chain system, the system enables a transaction mechanism to keep public and private key pairs and establishes a one-to-one correspondence relation with client information, thereby solving theproblem of loss of private keys caused when a client keeps the private keys directly, and providing possibility for commercial use of block chains; and the client does not need to care what are blockchain public and private keys, only needs to pay attention to original user name passwords or hardware Ukey and the like issued by the mechanism, and does not need to change original operation habits.

The invention relates to a distributed coal mine rock burst monitoring method, belonging to a ground pressure monitoring method. The existing industrial Ethernet in a coal mine integrated automation system can be used for information transmission, a network sensor provided with an Ethernet interface is connected with a network, multiple measurements such as electromagnetic radiation, acoustic emission, micro-shock and the like which are used for reflecting signals of rock burst can be carried out, the measurement signals are transmitted into a host machine for monitoring the rock burst through the industrial Ethernet, and the host machine is used for analyzing, processing and locating a seismic source so as to realize rock burst monitoring; a main core of the network sensor is a singlechip provided with an Ethernet controller, and the measurement of three signals of electromagnetic radiation, acoustic emission and micro-shock can be realized by analog-to-digital conversion through three channels; and each sensor has the respective IP address. The method can be used for extracting features of various signals, carrying out event relativity analysis, extracting data fusion and event general features with different information, locating the seismic source and providing the analysis result of rock burst event.

The invention discloses a method for transferring ACK/NACK information, including the steps that an ACK/NACK numerical field carried by eNodeB in UL Grant is used for informing the bit number of the ACK/NACK information obligated on PUSCH by UE; Index information corresponding to each DL Grant on a PDCCH channel and carried by the eNodeB is used for informing the obligated position of the ACK/NACK feedback information of downlink transmission data corresponding to the DL Grant of the UE on the PUSCH; the UE carries the accurately received ACK/NACK information of the downlink transmission data corresponding to all the DL Grants on the appointed obligated position of the PUSCH and judges whether the instance that the DL Grant loses exists, if so, the ACK/NACK information corresponding to the lost DL Grant is set to be NACK, and the eNodeB is informed of the existence of the loss of the DL Grant; and the eNodeB retransfers the corresponding DL Grant and a corresponding downlink data block. The invention can solve the problems of a plurality of ACK/NACK feedbacks on the PUSCH and the loss of the DL Grant on the premise of not lowering the uplink covering range.

The invention discloses a sky-ground network based remote educational system implementing method, the system based on this method includes living broadcast classroom (lessons giving end), satellite home site, remote satellite receiving site, on the basis of satellite transmission network, combining with CERNET/Internet, implementing the real-time transmission and interaction between teachers and students with texts, voices and videos between living broadcast classroom and remote satellite receiving site; implementing multiple-mode teacher-student interaction and making synchronous real-time record and compression on data flows of filed teaching video, audio, electronic teaching plan, mouse, and electronic pointer and then transmitting to media server of the satellite home site by ground network, mixing and converting into DVB data form, then using satellite to broadcast them to each remote site, implementing living broadcast of teaching field; the remote site interacts with the teachers by means of texts, voices and videos through ground network; it can also implement automation, and synchronous record and generate stream media coursewares for students to demand and learn.íí íí íííííí íííííí

The embodiment of the invention provides an information interaction method and device. The information interaction method comprises the steps that when a user starts an application program, a first-window-sized floating window is generated; the first-window-sized floating window is displayed on a display interface of the application program; advertisement information is pushed to the user through the first-window-sized floating window. The information interaction method and device solve the problems that because the user clicks an advertisement, the program jumps, operation of the application program interrupts and operation data are possibly lost.

The invention discloses a method and a system for synchronizing data, relating to the field of memory database, and solving the problems of resource waste caused by synchronous operation of two memory databases and data loss caused by switching. The method for synchronizing data comprises the following steps of: receiving and caching logic log and ordering the logic log according to the serial number; judging whether the logic log is in normal state or not; and if so, writing the logic log in the memory database. The invention can be applied to data synchronization of a database.

The present invention relates to a multi-scale space-time hot point path detection method based on rapid road network modeling. The multi-scale space-time hot point path detection method comprises: constructing a road network by using large-scale track data; based on the constructed road network, carrying out road matching on the track; converting the track point sequence into the grid sequence covering the road; and carrying out hot point detection. According to the present invention, the multi-scale space-time hot point path detection method under the road-network-free topology support is provided so as to achieve the rapid road network construction based on the large-scale track data and the effective detection on the high flow path in the road network; and the high precision road network topology support is not required, the particular type of the data is not required, the positioning data of any existing positioning equipment can be used, and advantages of low economic input, rapidness, high efficiency and the like are provided.

The invention relates to a prediction method suitable for a movement track of a non-cooperative spinning object in space. A position coordinate of the object in a camera coordinate system is obtained, and a position coordinate of the object in an inertia coordinate system is solved according to a known camera attitude; and an NAR neural network is constructed, a BPTT algorithm is used to train the neural network, the position value of the object is predicted and output after deviation convergence, and the system robustness and sampling continuity are ensured. Position information is used to calculate an attitude transformation quaternion, the attitude transformation quaternion is calculated via kinematical and kinetic equations according to estimated parameters, and an estimated parameter value of least square regression is used to calculate a prediction result via the equations. The method is applied to an in-orbit service task of the space, the object track can be traced rapidly and accurately, and long-term prediction information of the object track can be obtained after parameter convergence.

The embodiment of the invention provides a method and a device for storing data. The method comprises the following steps: matching a fingerprint of each data block of a to-be-stored file with a fingerprint in a fingerprint database to obtain a corresponding backup data block; deleting repeated data of the to-be-stored file according to the backup data block, and performing status identification to the backup data block; and performing recovery process to the backup data block according to the status identification of the backup data block.

The t invention discloses an improved multi-expansion target tracking method. The method comprises the following steps: carrying out clustering and division on a measurement data set of a sensor and initializing a probability hypothesis density value and a potential distribution value of a target; predicting and updating a probability hypothesis density value and a potential distribution value oftarget state set at a next time to obtain a probability hypothesis density value and a potential distribution value at the current time; carrying out trimming and combination on a Gaussian term of anintensity function of the target, extracting target state estimation, and carrying out performance evaluation; and carrying out prediction, updating, and trimming and combination repeatedly and tracking the target till disappearance of the target. Therefore, the tracking accuracy of the target in a clutter environment is improved; the precision losses caused by the blind area of the radar are reduced; the computing load of the filter is reduced; and the engineering application of the GM-CPHD filter is realized well.

The invention provides a method, device and network equipment for generating a multilink transparent transmission interconnection forwarding table. The method comprises the following steps of: receiving, by a first routing switch in a first network, an LSP (Label Switching Path) message sent by a second routing switch connected with the first routing switch in the second network; respectively comparing Nicknames and system identifiers corresponding to the Nicknames in the LSP message with that in a local link state database so as to judge whether conflicting Nicknames exist; and updating the local link state database according to the LSP message when the judging result shows that the conflicting Nicknames exist, and generating a TRILL (Transparent Interconnection of Lots of Links) forwarding table according to the updated local link state database and the conflicting Nicknames. When the technical scheme provided by the invention is adopted, the problem of data stream losses caused by the wrong forwarding of the data stream due to the conflict of the Nicknames is solved, and the success rate of the forwarding of the data stream is improved.

The present invention, pertaining to the field of communication, discloses a method for realizing fault recovery and data backup, a system and an apparatus thereof. Wherein, the method comprises the steps of starting a recovery tool, the recovery tool loading a customized root file system, establishing a pre-boot execution environment (PXE) support service, a file transmission service and a disk image management service, wherein, the PXE support service and the file transmission service are used for supporting the device to be recovered to realize the starting of an operating system through a network, and the disk image management service is used for performing disk image backup and/ or a recovery operation to the device to be recovered; after receiving an information that the starting of the operating system through a network by the device to be recovered is successful, remotely logging in the device to be recovered, and performing disk image backup and/ or a recovery operation to the device to be recovered by the disk image management service. When the device to be recovered is not configured with a CD-ROM, a display and a keyboard, the fault recovery of the device can be realized rapidly by using the method, and also the data backup is realized, therefore, time cost by the fault recovery of the device to be recovered is greatly shortened.

The invention provides a distributed type caching method and system. The method comprises the steps of configuring backstage cache management strategies on backstage cache management configuration, wherein the backstage cache management strategies comprise the step of setting server nodes in which service data are stored correspondingly, calling the service data in a database according to the backstage cache management strategies at service data generation time, and sending the service data to corresponding service nodes according to a unique primary key value of the service data. The method and system realize distributed cache of the service data, greatly reduce pressure of server nodes, and avoid loss of the service data and blocking of service nodes I/O.

The invention relates to a method and a system for backing up mobile phone short messages. The method comprises the following steps that: a user selects the short messages needing to be backed up; a mobile phone converts the short messages needing to be backed up into files of formats suitable for multimedia service transmission; and the files of the converted formats serving as an email are sent to a specified Internet mailbox by using a mobile multimedia email service. The system comprises the mobile phone, mobile email client software, a short message filtering module, a short message format converting module, a mobile email server, a target email server and a terminal computer capable of logging in the Internet mailbox, wherein the short message filtering module is used for screening the short messages needing to be backed up according to the setting of the user; and the short message format converting module is used for uniformly converting short message files of different formats into the formats suitable for the multimedia service transmission.

The invention discloses an unmanned aerial vehicle-based data acquisition method and system for individual building modeling. The data acquisition method comprises the following steps: S1, acquiring a building height h1 and a sidelap degree P1 of an individual building; S2, according to the building height h1, generating a plurality of side surface air lines around a side surface; and S3, controlling an unmanned aerial vehicle to fly along the side surface air lines in sequence and take images so as to complete data acquisition from the bottom end to the top end of the side surface, wherein images between every two adjacent side surface air lines meet the sidelap degree P1. According to the unmanned aerial vehicle-based data acquisition method and system for individual building modeling, three-dimensional air line surrounding data acquisition of the individual building is implemented by using the measurement type unmanned aerial vehicle, precise information of the building is rapidly and conveniently is achieved in all directions by planning side surface air lines, and the problem that side surface information of a building is lost after conventional aerial photogrammetry is solved.

The invention discloses a method for preventing the interrupt of traffics in an aggregation link, which comprises the following steps: negotiating a port state by home terminal equipment and opposite terminal equipment, keeping the second category of configuration information of a port in a selected state currently constant, and using the port in the selected state currently to forward traffics; after the port state negotiation is completed, forwarding the traffics according to the negotiated port state, and using the changed second category of configuration information to update the corresponding port. The method ensures that the aggregation group bandwidth is fully used, improves the link stability, and better realizes the load sharing.

A management method for luggage tracing and wrong luggage tracking based upon RFID is applied to a system consisting of a management platform for luggage tracing and wrong luggage tracking, electronic labels, a reading and writing device, a terminal server for user inquiry, a wired or wireless network, a departure port information server storing and offering information service and a public service platform connecting with all the departure ports. The method is as follows: the departure port records information of the luggage route utilizing the reading and writing device, information is transmitted to the background for storing through a communication network and matches with the preplanned luggage route to locate wrong luggage timely and start wrong luggage treatment. The information server generates a luggage route map based upon the backup luggage route to track or trace luggage to locate luggage and the wrong parts and find the luggage rapidly. When a single departure port fails to process information related to a certain luggage route, the public service platform connects with all the departure ports to acquire or send overall luggage route information, thus achieving fast and unblocked luggage tracing and wrong luggage tracking in the industry.

The invention discloses data receiving and transmitting methods and devices and a data transmission system, relates to the field of communications and solves the problem of incapable realization of the reliable processing on the data packet missing while reasonably occupying the network resources. The data receiving method comprises the following steps: after receiving a media data packet, judging whether the missing media packet can be restored or not, if so, restoring the missing media packet, otherwise, transmitting the packet missing information to a streaming media server and requesting the streaming media server to retransmit the missing media packet. The technical scheme is suitable for IPTV services.

The invention discloses a power supply switching device which is applied to a vehicle communication system. The power supply switching device comprises a main power supply, a voltage converting circuit, a backup power supply, a switching circuit and a temporary circuit, wherein the main power supply can provide a first voltage; the voltage converting circuit is connected with the main power supply for receiving the first voltage and converting the first voltage into a second voltage to the vehicle communication system; the switching circuit is connected with the voltage converting circuit, the backup power supply and the vehicle communication system and detects the first voltage value of the first voltage or a second voltage value of the second voltage; when the first voltage value or the second voltage value is smaller than a threshold value, the switching circuit switches the main power supply to the backup power supply for supplying power to the vehicle communication system; and a temporary power supply is connected with the voltage converting circuit, the switching circuit and the vehicle communication system for providing power supply needed by a vehicle communication device in the switching process.

The invention discloses a multi-target tracking method in the case of loss of measurement data. The multi-target tracking method includes the following steps: initializing probability hypothetical density and potential distribution of a target state set; predicting the probability hypothetical density and potential distribution of the target state set; updating and converting a deviation matrix and a covariance matrix for measurement; introducing a scaling factor, and changing a gain matrix; using an ellipsoid threshold to remove irrelevant measurement data for the weight of a target strength function; performing trimming and merging, and extracting a target state; determining if a target exists or not, returning to the step of predicting the probability hypothetical density and potential distribution of the target state set if so, otherwise ending target tracking. According to the invention, the scaling factor is introduced during updating of a CPHD filter to regulate the filter gain matrix, and the robustness of the filter can be improved; a self-adaption threshold can simplify a measurement set, the observation number of a current observation set is reduced, all the measurement data irrelevant with a detected target is removed, and finally, the computing amount is reduced.

The invention discloses an automatic public transport passenger flow counting method and system. The method comprises the following steps: I. acquiring a video; II. acquiring a current background edge image; III. acquiring a current video frame edge image and a gradient direction angle of each pixel point; IV. acquiring a target edge image; V. acquiring a candidate circle center linked list; VI. acquiring the contours of the head parts of passengers; and VII. grouping and combining candidate circles to obtain the circular contour corresponding to the head part of each passenger; and VIII. tracing the contours of the head parts of all passengers to obtain the number of the passengers. The method has high counting precision and strong practicability, solves the difficult problem of counting the public transport passenger flow and provides technical support for achieving reasonable distribution, effectively utilizing the limited public transport resource and improving the public transport operating efficiency.