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Related Concept Videos

Linearization and Approximation01:26

Linearization and Approximation

Linearization is a mathematical technique used to approximate complex, nonlinear functions with simpler linear models in the vicinity of a chosen reference point. The method is based on the idea that, although a function may be difficult to evaluate exactly, its behavior near a specific input value can often be closely approximated by the tangent line at that point. This approach is particularly useful when small deviations from a known value are involved.Consider the square root function, for...
Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear.
Linear Approximations01:23

Linear Approximations

For a differentiable function of two variables, linear approximation estimates values near a known point by replacing the curved surface with its tangent plane. Consider the function\begin{equation*}f(x,y)=x^2+3y^2\end{equation*}near the point (2, 1). The exact value at this point is f(2, 1) = 22 + 3(1)2 = 4 + 3 = 7.The linear approximation of f(x, y)) near (a, b) is\begin{equation*}L(x,y)=f(a,b)+f_x(a,b)(x-a)+f_y(a,b)(y-b)\end{equation*}First, compute the partial derivatives: fx(x, y) = 2x and...
Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length, the...
Application of Linearization and Approximation01:29

Application of Linearization and Approximation

A drone flying through complex terrain often relies on more than one sensing method to estimate small changes in altitude. Along with direct measurements, air pressure provides a useful indirect indicator of vertical movement. Atmospheric pressure decreases as altitude increases, and this relationship is commonly described using an exponential model. Although accurate, converting pressure measurements into altitude values requires calculations that are too complex to perform repeatedly during...
Model Approaches for Pharmacokinetic Data: Distributed Parameter Models01:06

Model Approaches for Pharmacokinetic Data: Distributed Parameter Models

Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
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Related Experiment Videos

Adaptive Debiased Lasso in High-Dimensional Generalized Linear Models with Streaming Data.

Ruijian Han1, Lan Luo2, Yuanhang Luo1

  • 1Department of Data Science and Artificial Intelligence, The Hong Kong Polytechnic University, Kowloon, Hong Kong.

Journal of the American Statistical Association
|July 15, 2026
PubMed
Summary

This study introduces an efficient online inference method for high-dimensional generalized linear models. The Adaptive Debiased Lasso (ADL) estimator updates estimates in a single pass, reducing computational complexity for real-time data analysis.

Keywords:
Confidence intervalLassoOne-pass algorithmStochastic gradient descent

Related Experiment Videos

Area of Science:

  • Statistics
  • Machine Learning
  • Computational Statistics

Background:

  • Traditional statistical inference relies on static datasets, limiting real-time analysis.
  • Online inference methods often require full dataset access or extensive summary statistics storage.
  • High-dimensional generalized linear models present computational challenges for sequential data.

Purpose of the Study:

  • To develop a novel online inference approach for high-dimensional generalized linear models.
  • To enable real-time updates of regression coefficients and standard errors with new data.
  • To reduce both time and space complexity compared to existing methods.

Main Methods:

  • A single-pass online inference algorithm.
  • An adaptive stochastic gradient descent algorithm for dynamic objective functions.
  • A novel online debiasing procedure to control optimization errors.

Main Results:

  • The proposed Adaptive Debiased Lasso (ADL) estimator maintains low-dimensional summary statistics.
  • Asymptotic normality of the ADL estimator is established.
  • Extensive simulations demonstrate the statistical validity and computational efficiency of the ADL estimator.

Conclusions:

  • The ADL estimator offers a computationally efficient and statistically valid approach for online inference in high-dimensional generalized linear models.
  • The method is effective for real-time analysis of sequentially collected data.
  • Demonstrated efficiency in spam email classification highlights practical applicability.