9 results about "Null character" patented technology

The present application relates to the technical field of firmware booting, and particularly provides an automatic multi-path booting method based on a configuration file, comprising the following steps: S1, when a UEFI firmware is executed to a preset callback point of a booting device selection stage, a callback function is executed, all accessed storage devices are enumerated in the callback function, whether an external storage medium conforming to a preset file system format exists is detected, and whether a predefined configuration file exists is found by traversing a root directory or a specified path of the medium; S2, if the configuration file is found, contents thereof are loaded to a memory buffer by a UEFI file system protocol, and are terminated by a null character; subsequently, a text structure of the configuration file is parsed according to a keyword, at least one booting strategy identifier and corresponding target booting parameters are extracted, and the present application can effectively solve the problems of backwardness, low efficiency, high operation cost and complex process of an existing UEFI pre-booting interaction mode.

The invention discloses a document content extraction method and system and a storage medium, and belongs to the technical field of data processing. The document content extraction method comprises the following steps: selecting a current sector from a damaged DOC document; determining sector data of the current sector according to a preset character coding mode, and performing invalid character detection on the current sector; if the invalid characters do not exist in the current sector, whether null characters exist in the current sector or not is judged; if the null characters do not exist in the current sector, all the characters in the current sector are set as alternative characters; if null characters exist in the current sector and characters behind any null character are null characters, all characters before the null character at the most front position in the current sector are set as alternative characters; judging whether the character type statistical result meets a preset condition or not; and if yes, setting the alternative characters as the document content. According to the method and the device, the document content of the damaged DOC document can be efficiently and accurately extracted.

This method according to the present disclosure comprises: acquiring image information including a text description information (TDI) supplemental enhancement information (SEI) message; and deriving text description information for at least one picture on the basis of the TDI SEI message, wherein the TDI SEI message includes a text description designated in a character string format, and the text description designated in the character string format is not a null character string.

The application relates to a WebSocket-based embedded serial port remote transparent transmission method and system, and relates to the technical field of embedded communication. The method comprises the following steps: registering a callback function of a receiving data pointer and a byte length parameter to a UART interrupt service program through a hardware abstraction layer; when a UART interrupt is triggered, executing the callback function to write original byte data into a ring buffer; and in a network task time slice, reading the original byte data from the ring buffer to construct a WebSocket frame, and sending the WebSocket frame to a client through a TCP connection. The application can realize asynchronous decoupling of a serial port interrupt and network sending, avoid heap overflow caused by dynamic memory allocation, guarantee complete transparent transmission of binary data containing null characters, and improve real-time performance and reliability in a resource-limited environment.

The invention relates to an OCR text matching and structured processing system and method and a storage medium. Comprising the following steps of: initializing a variable timemat and a set paindboxes; traversing the text line groups and skipping the processed text detection box; the similarity is calculated according to fixedkeys, and keywords are judged with 0.7 as a threshold value; a value box is selected for matching of the confirmed keywords according to a post-adjacent principle; sorting multiple rows of values such as'inspection content 'according to a Y axis and connecting and combining the values by using comma; when the appropriate value is not found, null character strings are given to the key; after conventional pairing is completed, secondary traversal is carried out to complement the keywords which are not paired for the first time, and finally a structured key value result is output. The system comprises a state management module, a traversal module, a keyword matching module, a pairing logic module, a multi-line processing module, a default value module, a supplementary traversal module, a result output module and the like. According to the scheme, the accuracy, the integrity and the availability of a structured result are improved in a complex format and identification error scene.

The invention provides a database data processing method and device based on multi-rule dynamic sorting, and the method comprises the steps: receiving sorting request information, and extracting a to-be-sorted field value set from a data set based on the request information; identifying data types of field values in the field value set; under the condition that the field value set comprises a field value of a first data type, the field value of the first data type is converted into an empty character string, and the field value of the first data type does not comprise digits and preset language characters; and sorting the null character string and the field values, including the second data type, of the field value set according to the data type. In this way, based on the field values of different data types, the data are sorted by adopting the corresponding sorting rules, and the data processing efficiency can be improved.

The invention relates to a data coding method and system, a terminal and a storage medium. The method comprises the following steps: constructing a safe character set and a matched inverse mapping table; the method comprises the following steps: acquiring an original data packet, converting the original data packet into a plurality of groups of coded value sets according to a numerical value mapping mechanism, carrying out legality verification on the coded values in sequence according to an inverse mapping table, carrying out association mapping on each coded value passing verification and a safe character set to respectively obtain coded characters, and storing the coded characters in a database; collecting and generating a plurality of coded character strings; and collecting all the coded character strings, and generating a character text which corresponds to the original data packet and is matched with the target transmission protocol. According to the scheme provided by the invention, the security coding character set which does not contain null characters and transmission sensitive characters is constructed, and a specific mapping mechanism is combined, so that high-density and high-security coding operation on the original data is realized, and the data transmission efficiency is improved to the maximum extent.

The invention discloses a tire ridge-crossing data processing method and system, and relates to the technical field of tire testing. The method comprises the following steps: step 1, positioning a row number a1 of a MEASURDATA keyword in a tdx file through the MEASURDATA keyword, taking a (a1 + 1) row as a data part starting row, extracting the row and judging null characters (non-null is 0 and null is 1), taking an occurrence position of 01 as a data column segmentation boundary, circularly extracting and storing a data column row by row according to a segmentation position, and obtaining a data matrix c1; according to the method, except that any two tdx files are manually selected to be input, other operations are automatically completed through the alignment processing module of the system, convenience and rapidness are achieved, and the operation is simplified by not needing to import the tdx into excel to manually process data; according to the method, the starting time alignment of any two tdx data contact ridges can be realized, the method is not limited by the number of sampling points, the sampling frequency, a data template, a storage arrangement format and the like, and the practicability is high.

This invention relates to the field of data conversion technology, providing a method, apparatus, and computer-readable storage medium for converting tabular data. The invention converts the current row of string data in the source table into a first string array separated by whitespace characters. All strings in the first string array are then written into a second string array. Based on the number of whitespace characters between adjacent strings in the first string array of the current row, empty strings are written at corresponding positions in the second string array to represent empty data columns in the source table data. This ensures that when the second string array, which represents empty data columns in the source table data, is input into the target table, the resulting table will not have misaligned data columns, making the tabular data conversion more accurate.