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Mathematics, Volume 13, Issue 8

April-2 2025 - 147 articles

Cover Story: Processes in biotechnology are considered reliable if they produce samples that meet regulatory benchmarks. For example, laboratories may be required to demonstrate that the levels of an undesirable analyte rarely (e.g., in less than 5% of samples) exceed a tolerance threshold. This can be challenging when measurement systems feature a lower limit of detection, meaning that for some samples, the only available information is that the true measurement value lies below the minimum value detectable by the system. In this paper, we first investigate the implications of detection limits on commonly used location-scale model-based inference in reliability studies. To address the need for robust methods, we then introduce a flexible weakly parametric model in which the right tail of the response distribution is approximated using a piecewise-constant hazard model. View this paper
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Articles (147)

  • Article
  • Open Access
1,244 Views
20 Pages

21 April 2025

With the continuous integration of globalization and financial markets, the linkage of global financial risks has increased significantly. This study examines the risk spillover effects and transmission dynamics among the financial markets in G20 cou...

  • Article
  • Open Access
725 Views
20 Pages

21 April 2025

This paper studies the data-driven attitude tracking control issue for an unmanned underwater vehicle (UUV) with disturbances. First, a new polynomial finite-time prescribed performance function (FTPF) is introduced to avoid the problem of the comput...

  • Article
  • Open Access
720 Views
18 Pages

20 April 2025

This paper introduces a dual-strategy model based on temporal transformation and fuzzy theory, and designs a partitioned mining algorithm for periodic frequent patterns in large-scale event data (3P-TFT). The model reconstructs original event data th...

  • Article
  • Open Access
4 Citations
733 Views
17 Pages

20 April 2025

To improve the stability of rolling bearing fault signal denoising under different working conditions, this study proposes a multi-condition rolling bearing fault denoising method based on RIME-VMD. According to the characteristics of rolling bearing...

  • Feature Paper
  • Article
  • Open Access
913 Views
21 Pages

20 April 2025

In steel production, the blast furnace is a critical element. In this process, precisely controlling the temperature of the molten iron is indispensable for attaining efficient operations and high-grade products. This temperature is often indirectly...

  • Feature Paper
  • Article
  • Open Access
5 Citations
2,251 Views
19 Pages

20 April 2025

The analysis of commodity markets—particularly in the energy and metals sectors—is essential for understanding economic dynamics and guiding decision-making. Financial and economic uncertainty indices provide valuable insights that help r...

  • Article
  • Open Access
1,164 Views
13 Pages

19 April 2025

Geographically and Temporally Weighted Elastic Net Ordinal Logistic Regression is a parsimonious ordinal logistic regression with consideration of the existence of spatial and temporal effects. This model has been developed with the following three c...

  • Feature Paper
  • Article
  • Open Access
932 Views
25 Pages

Limit Theorems for the Non-Convex Multispecies Curie–Weiss Model

  • Francesco Camilli,
  • Emanuele Mingione and
  • Godwin Osabutey

19 April 2025

We study the thermodynamic properties of the generalized non-convex multispecies Curie–Weiss model, where interactions among different types of particles (forming the species) are encoded in a generic matrix. For spins with a generic prior dist...

  • Article
  • Open Access
4 Citations
1,145 Views
16 Pages

19 April 2025

This study presents a novel finite-time robust control framework for quadrotor systems subjected to model uncertainties and unknown external disturbances. A fast terminal sliding mode (FTSM) manifold is first constructed to achieve finite-time conver...

  • Feature Paper
  • Article
  • Open Access
2 Citations
1,703 Views
16 Pages

19 April 2025

In this paper, we tackle the challenge of optimizing resource utilization and demand-driven allocation in dynamic, multi-dimensional heterogeneous environments. Traditional containerized task scheduling systems, like Kubernetes, typically rely on def...

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Mathematics - ISSN 2227-7390