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相关概念视频

Quantum Numbers02:43

Quantum Numbers

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It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
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The Quantum-Mechanical Model of an Atom02:45

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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The Z-Scheme of Electron Transport in Photosynthesis01:34

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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
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Introduction to Inspiration: The Respiratory System in Action
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One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
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Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
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相关实验视频

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一个高效的图像加密方案,基于洛伦兹系统和量子启发的步行.

M Karmany1,2, A Moawad3, M Abaza4

  • 1Lab-STICC, UMR 6285 CNRS, ENSTA IP Paris, Brest, France. mahmoud.karmany@ensta.fr.

Scientific reports
|January 19, 2026
PubMed
概括

本研究介绍了一种使用混沌理论和量子步行的新型图像加密方法. 新框架增强了对网络威胁的安全性,为视觉数据提供了强大的保护.

关键词:
离散时间量子启发步行 (DTQWs)图像加密 图像加密洛伦茨混沌系统是一个混乱系统.这是一个S-Box.在SHA-256中使用SHA.

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科学领域:

  • 密码学 密码学 密码学 密码学
  • 信息安全 信息安全
  • 量子计算是一种量子计算.

背景情况:

  • 现有的基于混乱的图像加密方法与低密钥灵敏度和静态替换作斗争,这给安全的视觉数据传输带来了挑战.
  • 复杂的网络威胁需要先进的加密技术来提供强大的图像信息保护.

研究的目的:

  • 开发一个高度安全的多阶段图像加密框架,克服当前方法的局限性.
  • 为了提高图像加密算法中的密钥灵敏度,扩散和混.

主要方法:

  • 洛伦兹混乱系统,安全哈希算法256 (SHA-256) 和离散时间量子启发步行 (DTQWs) 的协同融合.
  • 利用位式模块化操作来实现混乱的扩散,并通过DTQW来动态构建依赖于纯文本的替换框 (S-Boxes),以避免混.
  • 将SHA-256纳入一个依赖会话的量子硬币旋转参数,以确保动态的,对纯文本敏感的演变.

主要成果:

  • 实现了接近理想的 (7.9999),高的NPCR和UACI率,以及接近零的相关系数.
  • 证明了高解密重建保真度,PSNR = ∞和NCC接近1以实现无损恢复.
  • 基于Python的评估证实了出色的安全性能和稳定性.

结论:

  • 拟议的框架提供了卓越的随机性,平衡的扩散-混机制,以及对统计和差异性攻击的弹性.
  • 它在先进的多媒体系统中为安全的图像通信和高保证度的数据保护提供了一个有希望的解决方案.