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相关概念视频

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.
However, the point estimate is most likely not the exact value of the population parameter, but close to it. After calculating point estimates, we construct interval estimates, called confidence intervals or prediction intervals. This prediction interval comprises a range of values unlike the point estimate and is a better predictor of the observed sample value, y. 
The...
Applications of Integration to Find Blood Flow01:27

Applications of Integration to Find Blood Flow

Blood flow through a cylindrical blood vessel can be mathematically described using the principles of laminar flow, a regime in which fluid moves smoothly in parallel layers. In this model, the velocity of the blood is not uniform across the cross-section of the vessel; rather, it varies with the radial distance from the center. The maximum velocity occurs along the central axis, decreasing progressively toward the vessel walls, where it reaches zero due to viscous drag.Approximating Blood...

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A Computational Method to Quantify Fly Circadian Activity
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流失的循环预测方法基于一个改进的果算法支持矢量机器优化.

Song Deng1, Chunyu Pei1, Xiaopeng Yan1

  • 1School of Petroleum Engineering, Changzhou University, Changzhou 213100, China.

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PubMed
概括
此摘要是机器生成的。

这项研究引入了一种有效的方法,用于预测钻探期间流失的循环. 将主要组件分析与改进的果优化算法和支持矢量机相结合,可以实现高精度,提高运营安全性和效率.

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科学领域:

  • 石油工程是石油工程中的一个.
  • 钻井操作 钻井操作
  • 预测建模预测建模

背景情况:

  • 钻井过程中流失的循环事件很难控制,因为它们的突然性质.
  • 传统的诊断方法是主观的,经验性的,导致预测延迟或不准确.
  • 对于高效,及时和准确的流失循环预测方法有着极大的需求.

研究的目的:

  • 开发一种新的,高效和准确的方法来预测流失的循环事件.
  • 与现有技术相比,提高预测准确度和速度.
  • 提高钻井操作的可靠性和性能.

主要方法:

  • 使用主要组件分析 (PCA) 和经验分析进行尺寸缩小.
  • 完善的果优化算法 (IFOA) 与支持矢量机 (SVM) 技术的整合.
  • 纳入帐地图策略,以实现平衡的人口分布和正弦-正弦直线搜索以实现优化.

主要成果:

  • 拟议的IFOA-SVM模型实现了特殊的性能指标:96.8%的准确性,97%的精度,96%的回忆率和96%的F1得分.
  • 该方法在减少代次数时表现出高精度,表明了效率和速度.
  • 综合方法有效地克服了诸如人口不规则分布和过早融合等挑战.

结论:

  • 开发的IFOA-SVM方法是一种非常准确和高效的流失流通预测方法.
  • 这种新的方法显著改善了传统的预测技术.
  • 在钻井操作中实施可以提高效率,可靠性和整体性能.