Jiangsu University

Nanjing University of Posts and Telecommunicatins

Nantong Institute of Nanjing University of Posts and Telecommunications Co.,ltd.

Ming Wang

Weidong Jia

Shuai Yang

Zhikuang Cai

Yufeng Guo

Zixuan Wang

Jiafei Yao

Henglu Wang

Mingxiong Ou

Huitao Zhou

Xun Xu

Jingqi Yao

Shiqun Dai

The present invention relates to a method for detecting a thickness of a tree canopy based on an ultrasonic echo signal, and belongs to the technical field of agricultural machinery information sensing and detection. The present invention analyzes and discriminates a first effective peak and a last effective peak of the ultrasonic echo signal, obtains a first effective peak time and a last effective peak time, and calculates the thickness of the tree canopy according to a provided calculation formula, thus realizing the direct detection of the thickness of the tree canopy. This method has characteristics such as a high accuracy and a wide application range, and is applicable to the field of detection of the thickness of a tree canopy in industries such as agricultural machinery and forestry machinery.

Method for detecting thickness of tree canopy based on ultrasonic echo signal

A method for preventing a differential cryptanalysis attack is provided. The method is implemented by an adaptive scan chain, a control module, and a plaintext analysis module. The plaintext analysis module controls the adaptive scan chain, so that two plaintexts differing in the last bit of only one byte are input through scan chains with different structures. Consequently, the two input plaintexts for which differential cryptanalysis attack technology originally can be used to crack the key are unable to generate outputs that can be used by the differential cryptanalysis attack technology.

Method for preventing differential cryptanalysis attack

Growing community of inventors

Jiangsu, China

Ming Wang