Based on some analyses of existing chaotic image encryption frameworks and a new designed three-dimensional improved logistic chaotic map(3D-ILM),an asymmetric image encryption algorithm using public-key Rivest–Shami...Based on some analyses of existing chaotic image encryption frameworks and a new designed three-dimensional improved logistic chaotic map(3D-ILM),an asymmetric image encryption algorithm using public-key Rivest–Shamir–Adleman(RSA)is presented in this paper.In the first stage,a new 3D-ILM is proposed to enhance the chaotic behavior considering analysis of time sequence,Lyapunov exponent,and Shannon entropy.In the second stage,combined with the public key RSA algorithm,a new key acquisition mathematical model(MKA)is constructed to obtain the initial keys for the 3D-ILM.Consequently,the key stream can be produced depending on the plain image for a higher security.Moreover,a novel process model(NPM)for the input of the 3D-ILM is built,which is built to improve the distribution uniformity of the chaotic sequence.In the third stage,to encrypt the plain image,a pre-process by exclusive OR(XOR)operation with a random matrix is applied.Then,the pre-processed image is performed by a permutation for rows,a downward modulo function for adjacent pixels,a permutation for columns,a forward direction XOR addition-modulo diffusion,and a backward direction XOR addition-modulo diffusion to achieve the final cipher image.Moreover,experiments show that the the proposed algorithm has a better performance.Especially,the number of pixels change rate(NPCR)is close to ideal case 99.6094%,with the unified average changing intensity(UACI)close to 33.4634%,and the information entropy(IE)close to 8.展开更多
Objective:To investigate the effect of out-of-hospital extended nursing on the compliance behaviors and therapeutic effect of brace treatment of patients with idiopathic scoliosis.Methods:54 patients with idiopathic s...Objective:To investigate the effect of out-of-hospital extended nursing on the compliance behaviors and therapeutic effect of brace treatment of patients with idiopathic scoliosis.Methods:54 patients with idiopathic scoliosis between February 2015 and December 2017 were randomly divided into control group and observation group.Patients in the control group received pelvic suspension traction,gymnastic exercises,and brace wear at discharge,on the basis of which patients in the observation group were added with extended care outside the hospital.The compliance behaviors and the changes of scoliosis angle(Cobb angle)of patients in the 2 groups were evaluated.Results:Compared with the control group,patients in the observation group had better compliance behaviors in completion status of functional exercise(χ2=5.594,P=0.018),brace wear(χ2=6.171,P=0.013),subsequent visit on time(χ2=9.247,P=0.002).Cobb angle was improved significantly in both groups at the last follow-up compared with that on admission,and the improvement was more significantly in the observation group(P<0.001).Conclusion:Through the implementation of out-of-hospital extended nursing,the compliance behaviors and clinical effect of brace treatment for idiopathic scoliosis patients are obviously improved,and this active nursing model is worth popularizing in clinic.展开更多
Objective: To observe the effect of super-early comprehensive rehabilitation intervention on neurodevelopmental prognosis of premature high-risk infants;Methods: Premature high-risk infantsmet the inclusion criteria w...Objective: To observe the effect of super-early comprehensive rehabilitation intervention on neurodevelopmental prognosis of premature high-risk infants;Methods: Premature high-risk infantsmet the inclusion criteria were divided into control group (n=30) and treatment group (n=30) according to parental willingness. The control group was given routine treatment, while the treatment group was treated with comprehensive rehabilitationon the basis of the control group. The course of treatment for both groups was 10 d. The changes of body weight, milk consumption, NBNA score, GMFM score and Gesell score were observed. Results:After treatment, the body weight and milk consumption of the treatment group increased significantly compared with those before treatment (P<0.01), which was significantly better than that of the control group (P<0.01);the NBNA score of the treatment group was higher than that of the control group at 40 weeks of gestational age (P<0.05), and the abnormal rate of NBNA was lower than that of the control group (P<0.01). The GMFM scores of A-energy and B-energy areas and the five dimensions of social adaptation, big exercise, fine exercise, language and personal social interaction in the treatment group increased significantly in 1 month, 2 months and 3 months after birth,which were significantly better than those in the control group (P<0.05 or P<0.01). Conclusion: Super-early comprehensive rehabilitation can improve the physical quality of high-risk infants and promote the development of the nervous system, with remarkable effect.展开更多
We propose a new asymmetric pixel confusion algorithm for images based on the Rivest-Shamir-Adleman(RSA)public-key cryptosystem and Arnold map.First,the RSA asymmetric algorithm is used to generate two groups of Arnol...We propose a new asymmetric pixel confusion algorithm for images based on the Rivest-Shamir-Adleman(RSA)public-key cryptosystem and Arnold map.First,the RSA asymmetric algorithm is used to generate two groups of Arnold transform parameters to address the problem of symmetrical distribution of Arnold map parameters.Second,the image is divided into blocks,and the first group of parameters is used to perform Arnold confusion on each sub-block.Then,the second group of parameters is used to perform Arnold confusion on the entire image.The image correlation is thereby fully weakened,and the image confusion degree and effect are further enhanced.The experimental results show that the proposed image pixel confusion algorithm has better confusion effect than the classical Arnold map based confusion and the row-column exchange based confusion.Specifically,the values of gray difference are close to one.In addition,the security of the new confusion operation is dependent on RSA,and it can act as one part of a confusion-substitution structure in a cipher.展开更多
基金the National Natural Science Foundation of China(Grant No.61972103)the Natural Science Foundation of Guangdong Province of China(Grant No.2023A1515011207)+3 种基金the Special Project in Key Area of General University in Guangdong Province of China(Grant No.2020ZDZX3064)the Characteristic Innovation Project of General University in Guangdong Province of China(Grant No.2022KTSCX051)the Postgraduate Education Innovation Project of Guangdong Ocean University of China(Grant No.202263)the Foundation of Guangdong Provincial Engineering and Technology Research Center of Far Sea Fisheries Management and Fishing of South China Sea.
文摘Based on some analyses of existing chaotic image encryption frameworks and a new designed three-dimensional improved logistic chaotic map(3D-ILM),an asymmetric image encryption algorithm using public-key Rivest–Shamir–Adleman(RSA)is presented in this paper.In the first stage,a new 3D-ILM is proposed to enhance the chaotic behavior considering analysis of time sequence,Lyapunov exponent,and Shannon entropy.In the second stage,combined with the public key RSA algorithm,a new key acquisition mathematical model(MKA)is constructed to obtain the initial keys for the 3D-ILM.Consequently,the key stream can be produced depending on the plain image for a higher security.Moreover,a novel process model(NPM)for the input of the 3D-ILM is built,which is built to improve the distribution uniformity of the chaotic sequence.In the third stage,to encrypt the plain image,a pre-process by exclusive OR(XOR)operation with a random matrix is applied.Then,the pre-processed image is performed by a permutation for rows,a downward modulo function for adjacent pixels,a permutation for columns,a forward direction XOR addition-modulo diffusion,and a backward direction XOR addition-modulo diffusion to achieve the final cipher image.Moreover,experiments show that the the proposed algorithm has a better performance.Especially,the number of pixels change rate(NPCR)is close to ideal case 99.6094%,with the unified average changing intensity(UACI)close to 33.4634%,and the information entropy(IE)close to 8.
文摘Objective:To investigate the effect of out-of-hospital extended nursing on the compliance behaviors and therapeutic effect of brace treatment of patients with idiopathic scoliosis.Methods:54 patients with idiopathic scoliosis between February 2015 and December 2017 were randomly divided into control group and observation group.Patients in the control group received pelvic suspension traction,gymnastic exercises,and brace wear at discharge,on the basis of which patients in the observation group were added with extended care outside the hospital.The compliance behaviors and the changes of scoliosis angle(Cobb angle)of patients in the 2 groups were evaluated.Results:Compared with the control group,patients in the observation group had better compliance behaviors in completion status of functional exercise(χ2=5.594,P=0.018),brace wear(χ2=6.171,P=0.013),subsequent visit on time(χ2=9.247,P=0.002).Cobb angle was improved significantly in both groups at the last follow-up compared with that on admission,and the improvement was more significantly in the observation group(P<0.001).Conclusion:Through the implementation of out-of-hospital extended nursing,the compliance behaviors and clinical effect of brace treatment for idiopathic scoliosis patients are obviously improved,and this active nursing model is worth popularizing in clinic.
文摘Objective: To observe the effect of super-early comprehensive rehabilitation intervention on neurodevelopmental prognosis of premature high-risk infants;Methods: Premature high-risk infantsmet the inclusion criteria were divided into control group (n=30) and treatment group (n=30) according to parental willingness. The control group was given routine treatment, while the treatment group was treated with comprehensive rehabilitationon the basis of the control group. The course of treatment for both groups was 10 d. The changes of body weight, milk consumption, NBNA score, GMFM score and Gesell score were observed. Results:After treatment, the body weight and milk consumption of the treatment group increased significantly compared with those before treatment (P<0.01), which was significantly better than that of the control group (P<0.01);the NBNA score of the treatment group was higher than that of the control group at 40 weeks of gestational age (P<0.05), and the abnormal rate of NBNA was lower than that of the control group (P<0.01). The GMFM scores of A-energy and B-energy areas and the five dimensions of social adaptation, big exercise, fine exercise, language and personal social interaction in the treatment group increased significantly in 1 month, 2 months and 3 months after birth,which were significantly better than those in the control group (P<0.05 or P<0.01). Conclusion: Super-early comprehensive rehabilitation can improve the physical quality of high-risk infants and promote the development of the nervous system, with remarkable effect.
基金Project supported by the National Natural Science Foundation of China(Nos.61972103 and 61702116)the Natural Science Foundation of Guangdong Province,China(No.2019A1515011361)+1 种基金the Project of Enhancing School with Innovation of Guangdong Ocean University(No.Q18306)the Guangdong Postgraduate Education Innovation Project(No.2020JGXM059)。
文摘We propose a new asymmetric pixel confusion algorithm for images based on the Rivest-Shamir-Adleman(RSA)public-key cryptosystem and Arnold map.First,the RSA asymmetric algorithm is used to generate two groups of Arnold transform parameters to address the problem of symmetrical distribution of Arnold map parameters.Second,the image is divided into blocks,and the first group of parameters is used to perform Arnold confusion on each sub-block.Then,the second group of parameters is used to perform Arnold confusion on the entire image.The image correlation is thereby fully weakened,and the image confusion degree and effect are further enhanced.The experimental results show that the proposed image pixel confusion algorithm has better confusion effect than the classical Arnold map based confusion and the row-column exchange based confusion.Specifically,the values of gray difference are close to one.In addition,the security of the new confusion operation is dependent on RSA,and it can act as one part of a confusion-substitution structure in a cipher.
