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Updated: Sep 13, 2025

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach
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Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Published on: July 3, 2020

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负二项式混合效应定位尺度模型用于强度纵向计数类型的可穿戴设备提供的体育活动数据

Qianheng Ma1, Genevieve F Dunton2, Donald Hedeker3

  • 1Department of Psychiatry and Behavioral Sciences, Stanford University, Palo Alto, CA 94304, United States.

Biometrics
|July 31, 2025
PubMed
概括

可穿戴设备提供详细的身体活动 (PA) 数据. 我们提出了一个统计模型来分析PA的平均值和可变性,从活动计数中改善健康洞察力.

关键词:
动画摄影 (actigraphy) 是一种摄影方式.分散建模的分散模型.强烈的纵向数据密集.移动健康的移动健康在零通货膨胀的情况下.

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Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity05:59

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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...
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Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
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