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相关概念视频

Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
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Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
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Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm
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Published on: December 9, 2012

使用进化算法设计高效的高阶沉浸式元分级.

Dhwanil Patel, Jacob de Nobel, Anna V Kononova

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    概括
    此摘要是机器生成的。

    这项研究引入了具有子波长结构的新型沉浸式元格,提高了微射效率并降低了紧光谱仪的偏振灵敏度. 这些先进的网格比传统的燃烧网格提供了更好的性能.

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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 纳米技术纳米技术
    • 频谱学是一种光谱学.

    背景情况:

    • 沉浸式反射网格提高了光谱分辨能力和光谱仪的紧性.
    • 传统的燃烧格在特定波长和高极化灵敏度下表现出有限的效率.

    研究的目的:

    • 使用次波长结构设计和理论演示一个沉浸式格子.
    • 为了提高衍射效率和减少偏振依赖与传统的浸泡格子相比.

    主要方法:

    • 优化沉浸在中的反射元格利用修改后的共差矩阵适应演化策略 (CMA-ES).
    • 针对与地球观测任务相关的短波红外波段-3 (SWIR-3) 的射角.

    主要成果:

    • 在SWIR-3频段中,优化的沉浸式元格实现了约78%的平均效率,超过了传统格 (约62%).
    • 极化灵敏度从~15%降低到~5%.
    • 制造容忍度分析显示,对于小特征尺寸错误,效率降低最小.

    结论:

    • 低波长结构的沉浸式超级格为传统的燃烧格提供了一个有希望的替代方案.
    • 这种设计显著提高了效率,并降低了光谱仪应用的偏振灵敏度.
    • 设计证明了对典型的制造变化的坚固性.