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| 1 | Chaotic Image Encryption Algorithm by Correlating Keys with Plaintext显示文摘A novel image encryption scheme based on the modified skew tent map was proposed in this paper. In the key generating procedure, the algorithm generates a plaintext-dependent secret keys set. In the encryption process, the diffusion operation with cipher output feedback is introduced. Thus, cipher-image is sensitive to both initial keys and plaintext through only one round diffusion operation. The key space is large. As a result, the algorithm can effectively resist differential attacks, statistical attacks, brute-force attacks, known plaintext and chosen plaintext attacks. Performance test and security analysis demonstrates that this algorithm is eficient and reliable, with high potential to be adopted for secure communications. | Zhu Congxu Sun Kehui | 2012 | China Communications2012，9，1： | 6 |
| 2 | Dynamics of a Strengthened Chaotic System and Its Circuit Implementation显示文摘To strengthen a chaotic system, a state feedback controller is applied to generate hyperchaotic behaviors based on the simplified Lorenz system, and a coordinate transformation is used for converting topological structure of the hyperchaotic system from two wings to four wings. Complex dynamics of the hyperchaotic and four-wing attractor system are analyzed and verified by Lyapunov exponent spectrums, bifurcation diagrams,phase portraits, Poincar′e sections and circuit realization.The circuit experiment results are agreed well with the simulation results, and it lays a good foundation for the chaotic secure communication. | SUN Kehui LIU Xuan ZHU Congxu | 2014 | Chinese Journal of Electronics2014，23，2： | 4 |
| 3 | Chaos-Based Multipurpose Image Watermarking Algorithm显示文摘To achieve the goal of image content authentication and copyright protection simultaneously, this paper presents a novel image dual watermarking method based on chaotic map. Firstly, the host image was split into many nonoverlapping small blocks, and the block-wise discrete cosine transform (DCT) is computed. Secondly, the robust watermarks, shuffled by the chaotic sequences, are embedded in the DC coefficients of blocks to achieve the goal of copyright protection. The semi-fragile watermarks, generated by chaotic map, are embedded in the AC coefficients of blocks to obtain the aim of image authentication. Both of them can be extracted without the original image. Simulation results demonstrate the effectiveness of our algorithm in terms of robustness and fragility. | ZHU Congxu LIAO Xuefeng LI Zhihua | 2006 | Wuhan University Journal of Natural Sciences2006，11，6： | 2 |
| 4 | Thermal properties of Si(Al)/diamond composites prepared by in situ reactive sintering显示文摘 | Zhu Congxu Ma Nan' gang Jin Ying | | 0，，： | 1 |
| 5 | Breaking and im- proving an image encryption scheme based on total shuffling scheme 显示文摘 | Zhu Congxu Liao Chunlong Deng Xiaoheng | 2013 | Nonlinear Dynamics2013，71，12： | 1 |
| 6 | A novel image encryption scheme based on improved hy perchaotic sequences显示文摘 | Congxu Zhu | 2012 | Optics Communications2012，285，1： | 1 |
| 7 | Thermal properties of Si (AD/diamond composites prepared by in situ reative sintering显示文摘 | Congxu Zhu Nangang Ma Ying Jin | 2012 | Materials and Design2012，41，20： | 1 |
| 8 | A Novel Image Encryption Scheme Based on Improved Hyperchaotic Sequences显示文摘 | Zhu Congxu | 2012 | Optics Communi- cations2012，285，1： | 1 |
| 9 | Thermal properties of Si(A1)/diamond composites pre- pared by in situ reactive sintering显示文摘 | ZHU CONGXU MA NANGANG JIN YING | 2012 | Materials and De- sign2012，，41： | 1 |
| 10 | Thermal properties of Si(Al)/diamond composites pre- pared by in situ reactive sintering显示文摘 | Congxu Zhu Nangang Ma Ying Jin Hua Bai Yi Ma Jing Lang | 2012 | Materials and Design2012，41，： | 1 |
| 11 | Hyperchaos andHyperchaos Control of the Sinusoidally Forced SimplifiedLorenz System显示文摘 | Sun Keihui Liu Xuan Zhu Congxu | 2012 | Nonlinear Dynamics2012，61，2： | 1 |
| 12 | Lightweight diamond/Cu interface tuning for outstanding heat conduction显示文摘With rapid developments in the field of very large-scale integrated circuits,heat dissipation has emerged as a significant factor that restricts the high-density integration of chips.Due to their high thermal conductivity and low thermal expansion coefficient,diamond/Cu composites have attracted considerable attention as a promising thermal management material.In this study,a surface tungsten carbide gradient layer coating of diamond particles has been realized using comprehensive magnetron sputtering technology and a heat treatment process.Diamond/Cu composites were prepared using high-temperature and high-pressure technology.The results show that,by adjusting the heat treatment process,tungsten carbide and di-tungsten carbide are generated by an in situ reaction at the tungsten–diamond interface,and W–WC–W_(2)C gradient layer-coated diamond particles were obtained.The diamond/Cu composites were sintered by high-temperature and high-pressure technology,and the density of surface-modified diamond/Cu composites was less than 4 g cm^(-3).The W–WC–W_(2)C@diamond/Cu composites have a thermal diffusivity as high as 331 mm^(2)s^(-1),and their thermal expansion coefficient is as low as 1.76×10^(-6)K^(-1).The interface coherent structure of the gradient layer-coated diamond/copper composite can effectively improve the interface heat transport efficiency. | Wenjie Dou Congxu Zhu Xiwang Wu Xun Yang Wenjun Fa Yange Zhang Junfeng Tong Guangshan Zhu Zhi Zheng | 2023 | Carbon Energy2023，5，12： | 0 |
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