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相关概念视频

Signal Sequences and Sorting Receptors01:41

Signal Sequences and Sorting Receptors

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Signal sequences are short amino acid sequences that guide newly synthesized proteins to their proper location within the cell. Classical signal sequences are fifteen to sixty amino acids long and present at the N-terminus of a polypeptide chain. Each signal sequence has a conserved segment of basic residues towards their N terminus, a hydrophobic core, and a C-terminus rich in polar residues. The C-terminus also contains a signal cleavage site and features a -3 -1 sequence motif. The -3-1...
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In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
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Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
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Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest. Among the various sampling methods used by...
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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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An even signal, whether in continuous-time or discrete-time, is defined by its symmetry with its time-reversed version. Mathematically, this is represented as
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相关实验视频

Updated: Jul 27, 2025

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
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带有外 A 频道代码和投影解码的有模式的 Reed-Muller 序列,用于插槽控制的无源随机访问.

Wenjiao Xie1, Huisheng Zhang1

  • 1School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710129, China.

Sensors (Basel, Switzerland)
|June 10, 2023
PubMed
概括

我们推出了一种新的编码压缩传感方法,用于无源随机访问,提高效率和用户能力. 这种有模式的 Reed-Muller 代码显著提高了无线网络的性能.

关键词:
阻断色的道,阻止色的道.复杂的里德-穆勒代码.错误纠正代码 错误纠正代码几何学理论 几何学理论机器与机器之间的通信.投射式解码器 投射式解码器没有来源的随机访问.

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科学领域:

  • 无线通信无线通信
  • 信息理论 信息理论
  • 编码理论编码理论

背景情况:

  • 无源随机访问 (URA) 允许设备在没有预先分配的槽位的情况下进行传输.
  • 压缩传感 (CS) 技术可以提高URA系统的光谱效率.
  • 现有的URA计划在管理大规模设备访问和确保可靠通信方面面临挑战.

研究的目的:

  • 为无源随机访问提出一种新的编码压缩传感方案.
  • 为URA引入一个新的代码类别,即图案Reed-Muller (PRM) 代码.
  • 提高URA系统的光谱效率和用户能力.

主要方法:

  • 开发基于插槽模式控制的编码压缩传感框架.
  • 建议和分析有模式的Reed-Muller (PRM) 代码,重点是它们的几何性质.
  • 一个投射式解码器的设计,利用PRM代码的几何特性.
  • 扩展PRM代码的"模式"属性,以减少同时传输.
  • 内部和外部代码 (t-tree和Reed-Solomon与Guruswami-Sudan列表解码) 的联合优化,以最大限度地降低信号对噪声比 (SNR).

主要成果:

  • 由于PRM代码的序列空间大,证明了高光谱效率.
  • 在复杂领域证明几何性质,提高检测可靠性和效率.
  • 确定影响序列碰撞概率的因素.
  • 在每位能量和适应的活跃用户方面,与基准方案进行了有利的比较.
  • 确定实用的外部代码的最佳设置,以最大限度地减少SNR.

结论:

  • 拟议的基于slot-pattern-control的编码压缩传感方案与PRM代码提供了无源随机访问的显著改进.
  • 通过其独特的几何性质,PRM代码提供了更高的可靠性和效率.
  • 该方案有效地减少了同时传输,并最大限度地减少了序列碰撞.
  • 内部和外部代码的联合优化可以在能源效率和用户容量方面实现卓越的性能.