In this paper, we propose a novel approach to secure communication based on spatiotemporal chaos. At the transmitter end, the state variables of the coupled map lattice system are divided into two groups: one is used ...In this paper, we propose a novel approach to secure communication based on spatiotemporal chaos. At the transmitter end, the state variables of the coupled map lattice system are divided into two groups: one is used as the key to encrypt the plaintext in the N-shift encryption function, and the other is used to mix with the output of the N-shift function to further confuse the information to transmit. At the receiver end, the receiver lattices are driven by the received signal to synchronize with the transmitter lattices and an inverse procedure of the encoding is conducted to decode the information.Numerical simulation and experiment based on the TI TMS320C6713 Digital Signal Processor(DSP) show the feasibility and the validity of the proposed scheme.展开更多
The orthogonal design was employed to study the reaction conditions of chitosan condensing with n-butyl aldehrde.Applying the L9(34) table in the method of the orthogonal experiment,proposing an optimal experiment con...The orthogonal design was employed to study the reaction conditions of chitosan condensing with n-butyl aldehrde.Applying the L9(34) table in the method of the orthogonal experiment,proposing an optimal experiment condition of pH,time,temperature and molar ratio of reactants in three different levels,the result showed that the best condition was pH:9,temperature:70℃,time:5h,and molar ratio of reactants:1∶6.Shiff base structure was determined by IR.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.61172070)the Funds from the Science and Technology Innovation Team of Shaanxi Province,China(Grant No.2013CKT-04)
文摘In this paper, we propose a novel approach to secure communication based on spatiotemporal chaos. At the transmitter end, the state variables of the coupled map lattice system are divided into two groups: one is used as the key to encrypt the plaintext in the N-shift encryption function, and the other is used to mix with the output of the N-shift function to further confuse the information to transmit. At the receiver end, the receiver lattices are driven by the received signal to synchronize with the transmitter lattices and an inverse procedure of the encoding is conducted to decode the information.Numerical simulation and experiment based on the TI TMS320C6713 Digital Signal Processor(DSP) show the feasibility and the validity of the proposed scheme.
文摘The orthogonal design was employed to study the reaction conditions of chitosan condensing with n-butyl aldehrde.Applying the L9(34) table in the method of the orthogonal experiment,proposing an optimal experiment condition of pH,time,temperature and molar ratio of reactants in three different levels,the result showed that the best condition was pH:9,temperature:70℃,time:5h,and molar ratio of reactants:1∶6.Shiff base structure was determined by IR.
