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Related Concept Videos

Prediction Intervals01:03

Prediction Intervals

The interval estimate of any variable is known as the prediction interval. It helps decide if a point estimate is dependable.
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Distribution Reliability and Automation

Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
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Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least squares (OLS)...
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Correlation and Regression

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Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...

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Constructing and Visualizing Models using Mime-based Machine-learning Framework
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How to generate reliable and predictive CoMFA models.

Lei Zhang1, Keng-Chang Tsai, Lupei Du

  • 1Department of Medicinal Chemistry, School of Pharmacy, Shandong University, Jinan, China.

Current Medicinal Chemistry
|December 25, 2010
PubMed
Summary
This summary is machine-generated.

Optimizing Comparative Molecular Field Analysis (CoMFA) parameters enhances its predictive accuracy in drug discovery. This review surveys descriptors to improve CoMFA model robustness and performance.

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Area of Science:

  • * Computational chemistry
  • * Cheminformatics
  • * Drug discovery and development

Background:

  • * Comparative Molecular Field Analysis (CoMFA) is a key 3D quantitative structure-activity relationship (QSAR) technique.
  • * CoMFA's predictive power is limited by data-dependent noise and default settings.
  • * Optimizing CoMFA parameters is crucial for improving model robustness and accuracy.

Purpose of the Study:

  • * To conduct a comprehensive survey of descriptors used in CoMFA.
  • * To analyze the contribution of various factors to CoMFA model predictive ability.
  • * To provide insights for enhancing CoMFA's performance in drug discovery.

Main Methods:

  • * Review of existing literature on CoMFA methodology.
  • * Analysis of factors influencing CoMFA model predictions, including molecular conformation, alignment, field descriptors, and grid spacing.
  • * Examination of optimization strategies for CoMFA parameters.

Main Results:

  • * Optimized parameters significantly improve CoMFA model predictive results compared to default settings.
  • * Molecular conformation, alignment, field descriptors, and grid spacing critically impact CoMFA's predictive accuracy.
  • * Various endeavors have been made to enhance CoMFA's robustness and predictive capabilities.

Conclusions:

  • * Optimizing CoMFA parameters is essential for maximizing its predictive potential in drug discovery.
  • * A thorough understanding of descriptor contributions can lead to more robust and accurate QSAR models.
  • * This survey highlights strategies for improving CoMFA's application in pharmaceutical research.