5 results about "Index function" patented technology

The invention relates to an exponential function operation processing device and method and a controller. The device comprises a function conversion unit used for obtaining an original exponential function and converting the original exponential function into a natural exponential function; the parameter decomposition unit is used for decomposing an exponential term of the natural exponential function based on the reference cardinal number to obtain an integer term parameter and a decimal term parameter; the operation unit is used for performing index operation by taking a natural number as a base number and a decimal term parameter as an index to obtain an intermediate operation result; and the merging unit is used for performing merging operation on the intermediate operation result according to the integer term parameter and the reference cardinal number to obtain an exponential function operation result of the original exponential function. By adopting the method, the calculation precision and the hardware resource consumption can be effectively balanced.

The application combines the technical field of dynamic analysis, and provides a consortium chain contract threat detection method, which can detect and process security vulnerabilities of a contract before the contract is formally deployed. The main scheme includes an index function generation module: through a large amount of data, the execution characteristics of the contract are obtained by simulating the execution of the contract, and an index function is constructed; a data variation module: inputting the specification data sample of the execution contract, according to the execution characteristics of the contract and the format requirements of the data, selecting the correct fuzz strategy, generating the data after variation, caching the data after variation, and waiting for the threat discovery module to request or provide data for re-variation; a threat discovery module: obtaining the data after variation from the data variation module, simulating the execution of the contract, obtaining the execution result of the variation data, and matching with the index function, if the deviation reaches a certain value, a threat warning is output.

The application provides a terminal device and a music generation method. The method can set an evaluation index function and a constraint condition of music generation, and create an initial population, wherein the initial population includes a first population and a second population. A first algorithm is used to iteratively evolve the first population to iteratively search for an optimal individual in the first population, and a second algorithm is used to iteratively evolve the second population to iteratively search for an optimal individual in the second population. An exchange operation is performed on individuals in the first population and individuals in the second population at intervals of a preset iteration number. Finally, target music is generated according to the results of the iterative evolution, wherein the target music is an individual whose fitness function value is greater than a preset fitness threshold when the iteration number is equal to an iteration threshold, and the fitness function value is calculated according to the evaluation index function and the constraint condition. The method generates music in a multi-population cooperative evolution manner, can more comprehensively search the solution space, and thus improves the quality and speed of music generation.

The embodiment of the present application provides a directory access method, a consistent directory and a processor chip, and the method comprises the following steps: querying the consistent directory based on a request address; the consistent directory is divided into a plurality of virtual groups based on index bits, each virtual group comprises a first part and a second part; the first part is used for storing a plurality of directory entries, and different index functions are used in each path in the same virtual group; the second part is used for storing the positions of invalid directory entries in the same virtual group; based on the first part and the second part obtained by querying, a target operation to be executed is determined, and the target operation comprises one of the following: an update operation, a replacement operation, an insertion operation, a moving and insertion operation; the target operation is executed in a target virtual group, and the first part and / or the second part are updated. On the basis of reducing the number of reading SRAM and the control complexity, the embodiment of the present application can reduce the replacement operation of the directory entry, so that the access delay is reduced and the system performance is improved.

The embodiment of the present application provides a directory access method, a consistent directory and a processor chip, and the method comprises the following steps: querying the consistent directory based on a request address; the consistent directory is divided into a plurality of virtual groups based on index bits, each virtual group comprises a first part and a second part; the first part is used for storing a plurality of directory entries, and different index functions are used in each path in the same virtual group; the second part is used for storing the positions of invalid directory entries in the same virtual group; based on the first part and the second part obtained by querying, a target operation to be executed is determined, and the target operation comprises one of the following: an update operation, a replacement operation, an insertion operation, a moving and insertion operation; the target operation is executed in a target virtual group, and the first part and / or the second part are updated. On the basis of reducing the number of reading SRAM and the control complexity, the embodiment of the present application can reduce the replacement operation of the directory entry, so that the access delay is reduced and the system performance is improved.