Stand growth and yield model dynamic management method based on encryption technique

Abstract

The invention provides a stand growth and yield model dynamic state management method based on an encryption technique, and relates to the technical field of forestry resource management and forestry informatization. The method comprises the following steps: S1, a stand growth and yield model table is built; S2, the symmetric encryption technique DES (data encryption standard) is used for performing encryption to a model stored in the stand growth and yield model table, and a cipher text generated through encryption is written in the stand growth and yield model table; S3, the symmetric encryption technique DES is used for performing decryption to the cipher text read in the stand growth and yield model table, and the plaintext generated through decryption is displayed to a user; S4, the structured query language (SQL) is used for performing analysis to a model in the plaintext. The method builds a stand growth and yield model table, closely related to the origin, of the same area, uses the encryption technique to perform management to the access of data in the model table, provides a fast and simple model interpretation method, and finally realizes flexile and safe dynamic management of the stand growth and yield model.

Description

technical field [0001] The invention relates to the technical fields of forestry resource management and forestry informatization, in particular to a dynamic management method for stand growth and harvest models based on encryption technology. Background technique [0002] Stand growth and harvest models describe the relationship between tree growth and stand state and site conditions, and use growth models to estimate the development of stands under various specific conditions. Forest growth model, as a guide for forest management activities to reduce production costs, increase output or economic benefits, is the most practical. It is widely used in forest resource data update, forest resource harvesting construction and planning, and visual simulation of forest growth Forestry production practice and research, etc., provide forecast data for dynamic decision-making of forest resource management and scientific management. [0003] Forestry often uses the Logistic equation ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of the poor flexibility of directly embedding the stand growth and harvest model into the program and the low security of the model library management method, the present invention provides a dynamic management method for the stand growth and harvest model based on encryption technology, which can realize: 1 1. Build a stand growth and harvest model table that is closely related to the same area and origin; 2. Use the symmetric encryption technology DES to encrypt and decrypt the models stored in and read from the stand growth and harvest model table, and convert the model to ciphertext Stored in the model table and displayed to the user in plain text; 3. Provides a fast and simple interpretation method for the stand growth and harvest model; finally realizes the safe and dynamic management of the stand growth and harvest model

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