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相关概念视频

Introduction to MATLAB01:24

Introduction to MATLAB

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MATLAB stands for Matrix Laboratory. MathWorks developed MATLAB as a multi-paradigm numerical computing environment and proprietary programming language. It has evolved significantly over the years to become a tool utilized by engineers, scientists, and mathematicians for various tasks, including matrix calculations, developing algorithms, data analysis, and visualization. MATLAB's applications span various industries and disciplines. It's used in image and signal processing,...
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Power01:08

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The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
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In definite integration, Riemann sums approximate the area under a curve by dividing it into subintervals and summing the areas of rectangles. When these approximations follow predictable numerical patterns, such as arithmetic or polynomial sequences, sum formulas offer a more efficient and accurate way to compute the result. In particular, the sum of consecutive integers, squares, and cubes plays an essential role in simplifying these calculations, especially when dealing with uniform...
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Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.
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Complex Power01:14

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Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
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Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 watts. Consider a 25 Watt bulb and a 60 Watt bulb. The conversion of electrical energy produces heat and light, while the kinetic energy lost by the...
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PRISME:用于大数据驱动的多模式功率基准测试的 MATLAB 工具箱.

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    神经成像中的低统计能力阻碍了研究. PRISME (Power Resampling Infrastructure for Statistical Method Evaluation) 是一个新的 MATLAB 工具箱,为神经成像研究提供高效的,方法无关的功率分析,提高可重现性和资源使用.

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    科学领域:

    • 神经成像是一种神经成像.
    • 统计分析 统计分析
    • 计算神经科学是一种神经科学.

    背景情况:

    • 低统计能力是神经成像研究的一个重要问题,导致无法重现的发现和低效的资源配置.
    • 执行功率分析对于研究设计至关重要,但往往由于缺乏分析解决方案和高计算需求而受到阻碍.

    研究的目的:

    • 引入PRISME (用于统计方法评估的功率重新采样基础设施),这是一个为神经成像功率基准设计的MATLAB工具箱.
    • 为实证功率分析提供一个独立于特定推理方法的计算框架,以促进大规模的基准测试和比较.

    主要方法:

    • PRISME使用了一个非参数,灵活的算法,具有统一的数据表示,以支持各种神经成像数据类型,包括基于voxel的激活和功能连接.
    • 该工具箱容纳了各种测试类型,例如与行为和临床措施的关联和差异测试.
    • 算法优化实现了25倍的加快速度,从而实现了更大规模的功率基准测试.

    主要成果:

    • PRISME提供了一种方法和数据类型无关的方法,用于神经成像中的功率分析.
    • 它成功实现了ABCD数据集的第一个功率分析.
    • 该工具箱为各种神经成像研究设计的功率分析提供了统一的解决方案.

    结论:

    • PRISME解决了在神经成像中对高效和灵活的功率分析工具的关键需求.
    • 它的计算框架增强了进行强大的功率基准测试和方法比较的能力.
    • 该工具箱通过标准化功率分析来促进更可靠和可复制的神经成像研究.