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相关概念视频

Control of Power Flow01:30

Control of Power Flow

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There are several methods to control power flow in power systems:
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Binary Fission01:26

Binary Fission

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Binary fission is the primary mode of asexual reproduction in prokaryotes, such as bacteria. It results in the production of two genetically identical daughter cells. This highly efficient process ensures the rapid propagation of bacterial populations under favorable conditions and involves coordinated cellular and molecular events.DNA Replication and SeparationThe process begins with the replication of the bacterial chromosome. The circular DNA molecule unwinds at a specific origin of...
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Binary Fission01:20

Binary Fission

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Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
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Clinical Trials01:16

Clinical Trials

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Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
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Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
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A problem-solving strategy is a plan of action used to find a solution. Different strategies have distinct action plans. Trial and error involves trying different solutions until one works. For instance, to fix a broken printer, you might check ink levels, ensure the paper tray isn't jammed, and verify the printer's connection to your laptop. This method can be time-consuming but is commonly used. Thomas Edison, for example, used trial and error to find a suitable filament for the light...
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相关实验视频

Updated: Jan 23, 2026

Engineering Platform and Experimental Protocol for Design and Evaluation of a Neurally-controlled Powered Transfemoral Prosthesis
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贝叶斯权力先在平台试验中与二进制结果的非并发控制:开发和比较评估.

Junichi Asano1,2,3, Hiroyuki Sato3, Shin Watanabe3

  • 1Biostatistics Group, Center for Product Evaluation, Pharmaceuticals and Medical Devices Agency, Tokyo, Japan.

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概括

这项研究引入了一种新的贝叶斯权力先验方法,用于平台试验,通过自适应地借用非并发对照的信息来改进药物评估,以减轻偏差和增强统计能力.

关键词:
贝叶斯分析是贝叶斯分析.传染病是一种传染性疾病.不同步的非同步控制试验平台 试验平台 试验平台之前的功率前期.时间转移是时间转移.

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科学领域:

  • 生物统计学 生物统计学
  • 临床试验设计 临床试验设计
  • 药学研究 药学研究

背景情况:

  • 平台试验评估一个疾病的多种药物,提供灵活性和效率,特别是在流行病期间.
  • 在平台试验中的非并发控制 (NCC) 可以引入偏差并增加由于时间转移而导致的I型错误.
  • 现有的方法很难有效地纳入NCC数据,同时考虑到时间变化.

研究的目的:

  • 开发一种新的贝叶斯权力先验方法,用于在具有二进制结果的平台试验中整合非并发的控制数据.
  • 通过使用数据驱动的相似性指数,通过自适应地从NCC借取信息来解决时间变化.
  • 在各种时间转移场景中,与现有方法对比,评估拟议方法的性能.

主要方法:

  • 在整合数据驱动的相似性指数之前开发了贝叶斯力量,以调整从NCC借来的信息.
  • 模拟了各种时间转移的广泛场景,以评估操作特征.
  • 将拟议的方法与七种替代方法进行比较,包括频率主义和其他贝叶斯方法.

主要成果:

  • 提出的贝叶斯电力先验方法在各种时间转移场景中实现了I型错误控制和统计能力之间的有利平衡.
  • 它保持了I型错误率低于10%,并避免了在更积极的方法中存在的过度借贷问题.
  • 该方法在应用于COVID-19平台试验数据集时显示出实际实用性.

结论:

  • 新的贝叶斯权力先验方法有效地将NCC数据纳入平台试验中,减轻来自时间转移的偏差.
  • 这种方法为改善适应性试验设计中药物评估的效率和可靠性提供了强有力的解决方案.
  • 该方法在现实世界的临床试验中具有应用前景,包括针对COVID-19等传染病的临床试验.