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Multidimensional Z-Matrix with Control Parameters and Its Applications in Image Encryption 下载免费PDF全文
An n-dimensional Z-matrix with control parameters is presented, and its periodicity and chaos are testified. Experimental results show that the proposed Z-matrix has a long period and changeable periodicity with different dimensions. Some examples of image encryption with a Z-matrix of different dimensions are listed for demonstrating its applications. 相似文献
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<正>近年来,量子科技,特别是量子计算的研究呈加速发展的态势。包括中国在内的四十多个国家制定了量子规划,量子科技前沿竞争在不断升温。二十世纪初,以普朗克、爱因斯坦、玻尔为代表的一群科学先驱,共同努力,建立了量子力学这个人类迄今为止最基本、最深奥的科学理论体系。这是一项划时代的科学革命,奠定了现代信息技术发展的科学基础,也必将成为未来量子信息技术革命的科学源泉。 相似文献
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通过第一性原理密度泛函和超导Eliashberg理论计算, 我们研究了Li2C2在Cmcm相的电子结构和电声耦合特性, 预言这种材料在常压和5GPa下是由电声耦合导致的转变温度分别为13.2 K 和9.8 K的超导体, 为实验上探索包含一维碳原子链的材料中是否可能存在超导电性、发现新的超导体提供了理论依据. 如果理论所预言的Li2C2超导电性得到实验的证实, 这将是锂碳化物中转变温度最高的超导体, 高于实验观测到的LiC2的1.9 K和理论预言的单层LiC6的8.1 K超导转变温度. 相似文献
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Robust Magnetism Against Pressure in Non-Superconducting Samples Prepared from Lutetium Foil and H2/N2 Gas Mixture 下载免费PDF全文
We report the observation of a magnetic transition at the temperature about 56 K, through the high-pressure heat capacity and magnetic susceptibility measurements on the samples that have been claimed to be a nearroom-temperature superconductor [Dasenbrock-Gammon et al. Nature 615, 244(2023)]. Our results show that this magnetic phase is robust against pressure up to 4.3 GPa, which covers the critical pressure of boosting the claimed superconductivity. 相似文献
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