37results about How to "Prevent rewriting" patented technology

The invention discloses a text hidden method based on Chinese sentence pattern template transformation. The method utilizes the computer system to carry out watermark embedment and extraction on textinformation to hide the text information, comprising the following steps: (1) carrying out pre-treatment on an electronic file; (2) generating watermark information sign and setting a key; (3) carrying out part-of-speech tagging to format-free file generated in step (1) by a part-of-speech tagging module and outputting a part-of-speech tagging string of a sentence; (4) simplifying the part-of-speech tagging string output in the step (3) by a chunk tagging module; (5) loading a template module to select a sentence pattern module; (6) embedding watermark information by a watermark embedment module; (7) outputting the hidden text with embedded watermark; and (8) extracting the watermark information from the hidden text by a watermark extraction module through the key. The text hidden method changes sentence pattern through a template, avoids complex understanding and processing of grammar and semanteme, ensures the carrier text better satisfying grammar and semanteme habit and prevents blindfold rewrite.

The invention provides a gamma correction buffer circuit which comprises a judgment unit and a control unit. According to judgment unit, when a circuit system where the gamma correction buffer circuit is located is powered on, whether digital working voltage of the gamma correction buffer circuit is larger than or equal to threshold value voltage of the gamma correction buffer circuit or nor is judged. According to the control unit, when the digital working voltage is determined to be smaller than the threshold value voltage, an IIC serial bus of the gamma correction buffer circuit is prohibited from being operated, data are not allowed to be written into a storage unit of the gamma correction buffer circuit through the IIC serial bus, and when the digital working voltage is larger than or equal to the threshold value voltage, the control unit controls the IIC serial bus to be allowed to be operated, and the data can be written into the storage unit of the gamma correction buffer circuit through the IIC serial bus. The invention further provides an anti-interference method and a display device. According to the technical scheme, external disturbance can be prevented from affecting the data in a register of the gamma correction buffer circuit, the capacity of resisting the disturbance of a system is enhanced, and stability of the system is improved.

The invention discloses a memory data reading method of a memory, a display device, and a computer readable storage medium. The display device comprises a memory including a first storage area and a second storage area. The first storage area is electrically connected with a timing controller. The data reading method of the memory comprises the following steps: setting preset storage data according to the storage data stored in the first storage area and the second storage area; acquiring a logical address transmitted by the sequencer; When the logical address sent by the acquired timing controller is the same as the stored logical address, comparing the stored data of the first storage area with the preset storage data; when the stored data of the two storage areas do not coincide, assigning the storage data stored in the second storage area to the first storage area, and triggering the timing controller to read the stored data of the first storage area. The invention solves the problem that the timing control data stored in the memory is overwritten by the interference signal, and the display panel display picture ca not be driven normally.

A memory electromagnetic interference protection circuit and vehicle electronic equipment are provided; in the daily work, a protection unit (2) outputs a switching signal to control the memory (1) in the write-protected state; when the contents of the memory (1) need to be updated online, the protection unit (2) outputs the switching signal to control the memory (1) in a non-write-protected state, thus preventing the contents of the memory (1) to be overwritten by the serious electromagnetic interference environment, and causing memory content chaos.

The invention is applicable to the technical field of display, and provides a test system and a test method of a display panel, and the test system of the display panel comprises a signal test unit, apower supply unit, a time sequence control unit and a delay starting unit. A delay starting unit is arranged between the power supply unit and the time sequence control unit, and the power supply unit is temporarily restarted again after power failure. A time delay signal is outputted so as to control the power supply state of the power supply unit to the time sequence control unit, so that the restart of the time sequence control unit after power failure caused by short restart of the power supply unit after power failure causes a problem that the memory cell cannot meet the rewriting condition, and the data of the memory cell is prevented from being rewritten.

This programmable logic controller comprises: a device (2) that stores data; an authentication information storage unit (4) that stores authentication information; an authentication function unit (5) that performs user authentication on the basis of the authentication information; and an encryption filter (3) that includes a plurality of encryption patterns (311-31n), one of which is set in advance by a user for encryption processing. The authentication function unit (5) performs user authentication when there is a request from an external instrument to write data into the device, and if the user authentication is successful, the authentication function unit makes the encryption filter (3) perform encryption processing on the data to be written into the device (2) by using the encryption pattern (311-31n) set in advance by the user, and then writes the data into the device (2). If the user authentication fails, the authentication function unit makes the encryption filter (3) perform encryption processing on the data to be written into the device (2) by using an encryption pattern (311-31n) that is different from the pattern set in advance by the user, and then writes the data into the device (2).

A method for protecting code section used in MIPS system includes making addresses of code section and data section be both placed in region being able to be converted by internal memory management unit in MIPS system when host software is compiled and generated, making code section and data section be placed in said region in program address space of host software when host software is started up. The protection device for realizing said method is also disclosed.

The invention discloses a communication architecture of a display panel. By arranging a time delay circuit, the write-in protection signal can delay the opening of the bus switch after flowing throughthe delay circuit until the process of checking codes in the power supply management integrated circuit is finished, the bus switch cannot be opened when the time sequence controller is checked, andthe checked communication content of the memory is prevented from being rewritten.

The invention provides a screen displaying method and a mobile terminal. The screen displaying method is applied to the mobile terminal. The mobile terminal comprises a first display screen and a second display screen. The method comprises the steps that information to be displayed on the second display screen of the mobile phone is acquired; according to a second drawing mechanism, a display interface of the information to be displayed is drawn, wherein the second drawing mechanism and a first drawing mechanism which draws a display interface of the first display screen are different drawingmechanisms; the display interface is displayed on the second display screen. According to the technical scheme, a secondary screen of the mobile terminal is separately displayed and is independent ofa main screen, display of the secondary screen is controlled by adopting a mode which is different from a mode of the main screen, and rewriting for a system layer of the mobile terminal is avoided, and different display of the main screen and the secondary screen is achieved.

The invention relates to an automatic testing device for the air tightness of a bogie brake pipeline. The automatic testing device comprises a quick plug, a pneumatic triple piece, a second electromagnetic switch control valve, an electromagnetic proportional control valve, a first ball valve controller, a first pressure sensor, a first pressure gauge and a first transition joint which are connected in sequence, wherein the electromagnetic proportional control valve is further sequentially connected with a second ball valve controller, a second pressure sensor, a second pressure gauge and a second transition connector; the quick plug is connected with a wind source; and the first transition joint and / or the second transition joint can be respectively connected with the brake pipeline. Theautomatic testing device for the air tightness of the bogie brake pipeline can compile an air tightness test program according to different brake pipeline air tightness test technical conditions, complete an air tightness test according to a set test program, and automatically print a test record after the test is finished.

The invention relates to the technical field of charging, particularly to a charging parameter verification method and equipment, and a charger, and aims to solve the problem of charging failure caused by the fact that safety threshold of each charging parameter cannot be effectively controlled and judged. The charging parameter verification method comprises the following steps: after a communication channel between a terminal and the charger is established successfully, the terminal reads charging capability information of the charger according to a preset way, compares a maximum capability value of the charger specific to each preset charging parameter and a target value corresponding to a corresponding preset charging parameter stored by the terminal, determines the minimum value as a first configuration value of the corresponding preset charging parameter, writes the first configuration value, obtained by comparison, of each preset charging parameter into the charger, and reads a second configuration value, specific to each preset charging parameter, of the charger; and after it is determined that all preset charging parameters are configured successfully, the terminal transmits charging confirmation indication to the charger.

A solid-state imaging device includes a first chip and a second chip. The first chip includes a pixel array in which a plurality of photodiodes corresponding to each pixel of a captured image is disposed in a two-dimensional array shape. Each photodiode generates a pixel signal corresponding to a signal charge generated by the photoelectric conversion of the photodiode. The first chip is stacked on the second chip that includes a memory storing the pixel signals generated from the first chip, where the memory is located outside a projection region formed by projecting the pixel array and in a thickness direction of the first chip.

The embodiment of the invention discloses a read-write control method and apparatus of an ultrahigh frequency electronic tag, and a read-write device. The method comprises the following steps: performing encryption operation on a random number according to a preset encryption algorithm to generate a random password; receiving a third password calculated by upper computer software based on the random number, and a fourth password calculated by an encryption module based on the random number; respectively judging whether a random password is consistent with the third password and the fourth password; and if the random password is inconsistent with the third password, and / or random password is inconsistent with the fourth password, feeding back an authentication failure signal to the upper computer software, and controlling the read-write device to enter a standby state. Through the above manner, the embodiment of the invention can prevent the data in the electronic tag from being rewritten by unauthorized software or an unauthorized device, thereby ensuring the security of the data.

The invention provides a gamma correction snubber circuit. The gamma correction snubber circuit comprises a determination unit and a control unit, wherein when a circuit system of the gamma correction snubber circuit is electrified, the determination unit determines whether the digital working voltage is greater than or equal to the threshold voltage of the gamma correction snubber circuit; when the determination unit determines that the digital working voltage is smaller than the threshold voltage, the control unit controls an IIC serial bus of the gamma correction snubber circuit so that the IIC serial bus is prohibited to operate and the data cannot be written into a memory unit of the gamma correction snubber circuit through the IIC serial bus; and when the digital working voltage is greater than or equal to the threshold voltage, the control unit controls the IIC serial bus to enable the IIC serial bus to be able to operate and the data can be written into the memory unit of the gamma correction snubber circuit through the IIC serial bus. The invention also provides an anti-interference method for the gamma correction snubber circuit. Through the technical scheme of the gamma correction snubber circuit and anti-interference method for the gamma correction snubber circuit, the external influence on the data in a register of the gamma correction snubber circuit can be avoided, and the anti-interference capability of the system and the stability of the system can be improved.

The invention provides a Nor flash erasure interference correction method and a Nor flash erasure interference correction device. The method comprises: when a power-on signal of a flash memory chip isin a power-on reset signal, performing erasure interference confirmation and correction on all Nor flash array blocks when the Nor flash array blocks of a nonvolatile flash memory in a physical storage array are subjected to block erasure operation for M times; and performing erasure interference confirmation and correction on the Nor flash array block in the selected physical storage array whenthe Nor flash array block in the physical storage array is subjected to block erasure operation for the remaining N-M times. In the scheme, all Nor flash array blocks are subjected to interference erasing confirmation and correction for at least M times, and in the remaining N-M times, the selected Nor flash array blocks are subjected to interference confirmation and correction each time. Therefore, the time consumption and the power consumption of the whole erasing operation are reduced, and the stored data can be prevented from being rewritten.

The invention relates to an artificial intelligence technology, and discloses a data authority control method, which comprises the following steps of: constructing a data authority control table of a preset database; intercepting an SQL statement accessing a preset database; analyzing the SQL statement to obtain a user role, an object data table and a filtering condition of the object data table; querying operable data tables corresponding to the user roles and filtering conditions of each operable data table from the data authority control table; judging whether the object data table is in the operable data table or not; if the SQL statement is not in the operable data table, prohibiting the access of the SQL statement; if the object data table is in the operable data table, constructing a data screening model according to the filtering condition and the filtering condition of the operable data table; and screening out operable data of the user role in the object data table by utilizing the model, and performing access operation on the operable data by utilizing the SQL statement. The invention further provides a data authority control device, equipment and a medium. The maintenance difficulty of the data authority control process can be reduced.

The invention discloses a method for protecting data in a display panel and a display device thereof. The display device comprises a display panel; a storage unit which is arranged on a driving boardin the display panel and is used for storing data of a time sequence control unit; a time sequence control unit which is arranged in the display panel, and comprises a signal detection unit for detecting the state of a write protection signal; and a micro-processing unit which is used for determining to request or stop the storage unit from sending the data according to the state of the write protection signal.

The present invention relates to the technical field of charging, in particular to a method for verifying charging parameters and a device and a charger to solve the problem that the safety threshold of each charging parameter cannot be effectively controlled and judged, resulting in charging failure. The method is : After the communication channel between the terminal and the charger is successfully established, the terminal reads the charging capacity information of the charger according to the preset method, and compares the maximum capacity value of the charger for each preset charging parameter with the corresponding preset value saved by the terminal itself. The target value corresponding to the charging parameter is compared, and the minimum value is determined to be the first configuration value of the corresponding preset charging parameter, and the first configuration value of each preset charging parameter obtained by comparison is written into the charger, and read The second configuration value of the charger for each preset charging parameter; after determining that all preset charging parameters are successfully configured, the terminal sends a charging confirmation instruction to the charger.

The invention discloses a key protection method in a PSAM card. The key is written into a specified key file, a specified encryption algorithm is adopted, and the key value is used as the data of the specified encryption algorithm, which is also used as the encryption algorithm. Encryption key, calculate the encryption value; group the obtained encryption value by 4 bytes, and use the packet data to get a 4-byte verification value; save the verification value and the key file together, and back up the key and check value at the specified location on the PSAM card. The invention can effectively prevent the key from being rewritten and effectively protect the key.

The invention discloses a storage data reading and writing protection method. The method comprises setting unlocking constants, locking constants and unlocking / locking variables, setting the initial value of the unlocking constants as the locking constants; creating an unlocking interface, and assigning the unlocking constants to the unlocking / locking constants in a high-to-low bit-by-bit mode; receiving a program command for reading / writing storage data and calling the unlocking interface; determining whether the unlocking / locking variables are equal to the unlocking constants, if so, calling the reading and writing interface of the storage data and executing the operation of storage data reading and writing, and if not, inhibiting the storage data reading and writing. The storage data reading and writing protection method can avoid rewriting data inside a storage device due to program running disorder during power interruption.

The invention discloses a control behavior detection and protection method and system of an industrial control system. The detection and protection method includes receiving at least one data packet being transmitted on the communication network of the industrial control system; A control behavior associated with at least one data packet is detected by a plurality of characteristics; corresponding to at least one data packet being transmitted and the detected control behavior, at least one protection rule is determined; a protection operation is performed on the data packet, and the data packet is the corresponding One of several data packets of a protection rule, and the protection operation includes one or more of the following operations: allow data packet transmission, block data packet transmission, require user authentication, and record data packets. The invention can detect internal or external illegal operation attempts that violate the control behavior norms on the basis of the pre-established control behavior norms.

The invention relates to a WeChat platform information transmission encryption and decryption system comprising terminal units, encryption units, an intermediate server unit and an application server unit. The charge and discharge interfaces of the multiple terminal units are plugged into the encryption units respectively. The multiple terminal units are connected to the intermediate server via a network. The intermediate server is connected with the other multiple terminal units or the application server unit via a network. The other multiple terminal units and the application server unit are equipped with encryption units. According to the invention, the terminal units can be mobile phones, tablets or other handheld devices and are equipped with mini USB interfaces, micro USB interfaces or lighting interfaces, and the interfaces appear in Windows phone modes, Android phone modes and Apple phone modes. Information is processed while being transmitted, so that information rewriting in a terminal unit or in a network is avoided, and the security of information transmission is ensured.