42results about How to "No data loss" patented technology

The invention discloses a method for detecting a gas flow rate through a weight loss method. The method is used for dynamically analyzing the gas flow rate and comprises the steps of establishing dynamic connection between an electronic balance and a computer, starting a gas generator, starting timing and weighing, calculating the gas volume flow rate per unit time, obtaining a flow-time curve graph, and processing and analyzing detection data. According to the method, the electronic balance and the computer are connected dynamically, the gas mass flow rate of the gas generator is detected in real time, weighing software of the computer is used for finishing corresponding detection processes, and the method comprises model selection and configuration of the balance, conversion of the volume flow rate, setting of detection duration, drawing of the flow-time curve graph and processing and analyzing of data. The method is widely used for detection of gas flow rates of various medium and small gas generators and can be used for dynamic detection of gas flow rates with mass and time changed correspondingly. The method has the advantages of being simple to operate, safe to detect, high in detection precision and good in field adaptability.

The invention discloses an inter-cell switching method of a cellular-VANET heterogeneous network. The method comprises the steps of: (1), initiating a switching assistance request by a cell edge vehicle; (2), selecting a cooperative node; (3), initiating a channel access request by the cooperative node, and allocating a channel by a base station; and (4), carrying out received data merging between base stations, and realizing accessing of the edge vehicle to the channel. According to the inter-cell switching method provided by the invention, the vehicle in a switching process communicates with the base stations of a source cell and a target cell through assistance of other vehicles in a vehicle self-organizing network, the vehicle keeps communicating with the base stations all the time in the switching process, the data loss is avoided, and the relatively high data transmission speed can be kept.

The invention discloses a high-availability and high-consistency database cluster system and a command processing method thereof. The system comprises a command processing rule setting unit, an initial configuration unit and a plurality of nodes, wherein the nodes are connected through a private network; each node can provide complete data storage, access and command execution management services; the initial configuration unit is used for providing a configuration interface and determining a primary node and secondary nodes in the nodes in a manual configuration manner; and the command processing rule setting unit is used for setting a command processing rule and ensuring data among the nodes of the database cluster system in the command processing process to be synchronous and consistent. According to the system and the method, each node in the database cluster system can provide complete storage and access services; in the command processing process, the data of the nodes in the database cluster system is synchronous and consistent; and a single node fault does not influence normal work of the database cluster system and also does not cause data loss.

The present invention provides a memory device for reducing power consumption during a self-refresh operation performed for protecting data loss. For this object, in the present intention, the memory device for performing a refresh operation in a self-refresh period instigated for every constant time interval after entering into a self-refresh mode includes a low-power controller outputting a enable signal for enabling the power supply means during the self-refresh period after being enabled in the self-refresh mode; and a power supply means receiving the enable signal for supplying a low and a high voltages used in an internal circuit by using an external supply voltage and a ground voltage, wherein the low voltage is lower than the ground voltage and the high voltage is higher than the external supply voltage.

The invention discloses a data importing method and device for a graph database, and the method comprises the steps: registering a self-defined Spark udf function in a graph database program, and enabling the graph database to be connected with a Spark resource through the Spark udf function; creating a node attribute index in the graph database; inquiring a hive database by utilizing the spark resources to obtain inquired data; re-partitioning the queried data, and registering the re-partitioned data as a temporary data table; and importing the temporary data table into the graph database through the Spark udf function and the node attribute index. According to the method, the spark is combined with the graph database, real-time data import can be realized, the data does not need to be exported into a csv format. The Spark performance can be conveniently adjusted and the data import speed can be conveniently adjusted by utilizing the Spark technology, and by utilizing the concurrencycharacteristic of the Spark, the data import can be accelerated, and meanwhile, data loss is avoided.

The invention provides a streaming media live broadcast method and system. The streaming media live streaming method includes: the streaming end slices the real-time recorded streaming media, sequentially generates slice files that can be played independently; updates the generated slice file information to an index file, and the index file has preset slices File information capacity; the streaming end uploads the index file and the slice file to the server. The server can further process as needed. The streaming media live broadcast system includes: the slice processing module is used to slice the streaming media recorded in real time, and sequentially generates slice files that can be played independently; the slice upload module is used to update the generated slice file information to an index file, the The index file has a preset slice file information capacity, and the index file and the slice file are uploaded to the server. The technical solution of the invention improves the anti-fluctuation performance of live streaming media and ensures data integrity.

The invention discloses a data protection device and a data protection method for an RAID (Redundant Array of Inexpensive Disks) card. A Nand flash technology and a super capacitor technology are combined; when a system is unexpectedly powered off, cache data of the RAID card are protected. The data protection device for the RAID card comprises the RAID card, a Flash board and a capacitor management board, wherein the Flash board is responsible for communicating with the RAID card and the capacitor management board and monitoring the states of the RAID card and a capacitor; when the system is powered off, important data of the RAID card are enabled to be kept in an activated state by a super capacitor, so that the data are allowed to be copied from an RAID card onboard cache to the Flash. According to the data protection device and the data protection method disclosed by the invention, the data of the RAID card can be automatically cached, so the security of the data in the RAID card is guaranteed, and the stability of the system is improved.

The driving method for code flow broadcast card and code flow acquisition card includes transmitting code flow data between hardware and application program in DMA mode; judging the interruption type with the ISR of the drive program and processing various interruption types through calling DPC routine in the interruption delay process; and realizing the control of the application program on the hardware through the communication between the application program and the drive program. The present invention solves the problem in interfacing the code flow broadcast card and the code flow acquisition card with the application program to make the code flow broadcast card and the code flow acquisition card operate normally on computer PCI bus to complete code flow broadcast card and acquisition task and further analysis and monitoring. The drive program completes the code flow transmission correctly at code flow rate as high as 120 Mbps without data loss.

The invention discloses a buried long distance pipeline cathode protection device based on an STM32 single-chip microcomputer. The device is characterized in that an anode ground bed and a reference electrode are laid in the soil beside a buried long distance pipeline, and a cathode wiring point is arranged on the buried long distance pipeline; the device comprises an upper computer, a main control module, an AD data acquisition module, a DA control module, a communication module, a storage module, an RTC module, a human-computer interaction module, a power module and a temperature sensor. Compared with the prior art, the main control module acquires output voltage, output current and reference potential through the AD data acquisition module, the temperature of the pipeline is collected by the temperature sensor, the output voltage of the power module is automatically adjusted through the DA control module, and the corrosion rate of the buried pipeline is greatly reduced.

The invention belongs to the field of security and protection technology and relates to a trouble intelligent detecting method for a video surveillance device and a detecting system thereof. The trouble intelligent detecting method for the video surveillance device and the detecting system thereof solve the technical problems that the design is not reasonable and the like in the prior art. Each trouble inspection device in each area is connected with a plurality of video surveillance devices. An area memorizer and an area alarm device are respectively connected with each trouble inspection device in each area. The area memorizers are both connected with a concentration memorizer. The area alarm devices are both connected with a supervision device. The concentration memorizer and a concentration alarm device are both connected with the supervision device. A plurality of spare trouble inspection devices are connected on the supervision device. The area trouble inspection devices and the spare trouble inspection devices are same in quantity and coordinated in one-to-one correspondence to work. The trouble intelligent detecting method for the video surveillance device and the detecting system thereof have the advantages of that the whole framework is reasonable and the structure is simple, the work stability is good and the overall breakdown conditions are not easy to appear, alarm methods are various so as to eliminate risks of ignoring alarm signals, and alarm signals can be timely sent out.

The invention discloses a cluster robot mapping system and method. The sweeping robot uses laser radar to construct a grid map, and sends a local sub-map to the control center in real time in a local area network communication module built on the basis of a router. Finally, when the initial relative position of the robot is known, Based on the pose, the map coordinate system is transformed and fused into a complete map. The real-time mapping method of cluster sweeping robots based on the local area network of the present invention can solve the problem of long mapping time in a large-area indoor environment, and can not only improve the mapping quality, but also observe the mapping effect in real time.