30results about How to "Avoid read and write operations" patented technology

The invention discloses an SAR (Synthetic Aperture Radar) imaging signal processing data transposing method based on an FPGA (Field Programmable Gata Array), which is mainly used for solving the problems of high power consumption, low speed, low efficiency and no radiation resistance existing in a real-time imaging processing CTM (Communication Terminal Module) based on a DSP (Digital Signal Processor). The method comprises the following implementation steps of: storing signal processing data in a DDRII SDRAM (Double Data Rate II Synchronous Dynamic Random Access Memory) through the FPGA; performing matrix partitioning on matrix data in the DDRII SDRAM; transposing a diagonal mode matrix block and a symmetrical non-diagonal mode matrix block in sequence; when the quantity of distance direction sampling points is unequal to that of azimuth direction sampling points, transposing the an asymmetrical non-diagonal mode matrix block; resetting after transposition; and reading out the transposed data in the DDRII SDRAM as required by using the FPGA. Due to the adoption of the transposing method, the working efficiency of the DDRII SDRAM is improved greatly, and a transposition memory CTMsystem runs more stably, has lower power consumption, higher speed and higher efficiency and is resistant to radiation; and the transposing method can be applied to the design of an SAR imaging system.

The invention relates to the field of computer image processing and remote sensing technology, and discloses a method for optimizing the space-time efficiency of a high-resolution remote sensing image classification algorithm, which adopts a strategy for block processing of images, and introduces CUDA parallel computing and memory mapping file technology. Avoiding the read and write operations of the disk greatly saves the running time of the algorithm. The rationally optimized algorithm retains the advantages of less memory usage in the block processing method, and improves the image file access speed, improving the time efficiency and time efficiency of remote sensing image processing. space efficiency.

The invention discloses a mobile terminal and a data protection method thereof. The mobile terminal comprises a character string generation module used for generating a character string through an international mobile equipment identity (IMEI) number of the mobile terminal and a medium access control (MAC) address of a computer connected with the mobile terminal by an encryption algorithm; a character string write-in module used for writing the character string generated by the character string generation module in a space, invisible to a user, of the mobile terminal; a character string compare module used for judging whether the character string generated by the character string generation module is identical to a character string in the space, invisible to the user, of the mobile terminal; a read-write area judgment module used for judging whether the user should conduct read-write on a read-write protection zone or on a non-read-write protection zone; and a first connection judgment module used for judging whether the mobile terminal is connected with the computer for the first time when the mobile terminal is connected with the computer. According to the mobile terminal and the data protection method thereof, important data in the read-write protection zone of the mobile terminal can be protected practically and reliably.

This application discloses a processing system for reinsurance business, including: a message processing subsystem, which is used to collect and store policy data, encapsulate the policy information used to indicate the policy data into a reinsurance notification message, and send it to the message queue sub-system System; message queue subsystem, used to store the reinsurance notification message in the form of message queue; insurance policy processing subsystem, used to obtain the reinsurance notification message stored in the message queue subsystem, and obtain policy data according to the policy information it carries , matching the risk target information corresponding to the policy data with the reinsurance contract to obtain the reinsurance contract information matching the risk target information; the reinsurance data processing subsystem is used to obtain the risk target information in batches and the information matching the risk target information Reinsurance contract information, establish the relationship between risk target information and reinsurance recipients in batches. In order to solve the business congestion risk existing in the existing processing system for reinsurance business.

The invention relates to a high-precision riverway flood inundated area generation method for mass DEM (Digital Elevation Model) data. The method comprises the following steps of: performing stripe division on the mass DEM data; performing run length compression storage on a plurality of continuous inundation units on grid lines in stripes to reduce a data size; and finally extracting inundation ranges by virtue of a compression unit boundary tracing method, thereby generating an inundated area under complex terrain conditions. The method changes the conventional inundation source seed point filling method into grid compression storage and grid boundary tracing calculation, so that a large grid data size is processed with small memory configuration; and at the same time, a large amount of recursion judgment in the seed point filling method is avoided, and thus the computing speed is improved. The method fully utilizes digital terrain analysis and data compression storage technologies, avoids the problems generated by mass DEM data inundation analysis in the seed filling method, can be used for well performing connected domain analysis on complex terrain environments with rivers and lakes, and generates the wide-range and high-precision river and lake flood inundated area.

The invention discloses a data recovery method and device. According to a first index number corresponding to a faulty machine, backed-up data are searched for a backup file corresponding to the first index number; all service data which are stored by the faulty machine and backed up in the backup file are read; the read service data stored by the faulty machine are recovered to storage space corresponding to a second index number. Compared with a large amount of magnetic disk read-write operation produced when index data are recovered in the prior art, the data recovery method and device have the advantages that magnetic disk read-write operation produced by a machine where the storage space corresponding to the index number exists is avoided when the index data are recovered, and the data recovery speed is increased.

The invention discloses a virtual machine storage space management method. In the method, virtual storage free block information is directly acquired by a storage balloon agent module which is deployed in a virtual machine, and the acquired virtual storage free block information is transmitted to a storage balloon daemon process module which is deployed in a virtual machine monitoring unit layer;and the storage balloon daemon process module partially or totally releases a physical storage space corresponding to the virtual storage free block information and labels virtual storage blocks corresponding to the released physical storage space to be unavailable. The invention also discloses a corresponding system and physical host. Due to the method, the service condition of the virtual storage space can be acquired in real time, the massive reading / writing operation of a storage system can be avoided, and the method is suitable for virtual storage systems in a dynamic allocation format and a pre-allocation format.

The invention discloses a file receiving management method, device, terminal equipment and storage medium. The method includes the following steps: receiving the file, storing the file provided by the file producer into the target directory through one or more file receiving methods ;Target directory check, regularly check whether there are files in the target directory; file transfer, if there are files in the target directory, transfer the files in the target directory to the storage directory; file information entry, when the files in the target directory have been transferred After arriving at the storage directory, store the path of the storage directory and the basic information of the files in the database; threshold detection of the storage directory, to detect whether the files stored in the storage directory reach the threshold; early warning, when the files stored in the storage directory reach the threshold, trigger Early warning, send out early warning information. The invention can reduce the work pressure of personnel and improve the work efficiency by receiving and managing the automatic multi-channel files.