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Mathematics, Volume 12, Issue 17

September-1 2024 - 193 articles

Cover Story: We propose a pricing formula for a defaultable zero-coupon bond with imperfect information under a regime switching model using a structural form of credit risk modelling. This paper provides explicit representations of risky debt under regime switching with a constant interest rate and risky debt under regime switching with a regime switching interest rate. While the value of the firm’s equity is observed continuously, we assume that the total value of the firm is only observed at discrete times, such as the dates of the release of the firm’s annual reports, or quarterly reports. This uncertainty about the true value of the firm results in credit spreads that do not approach zero as the debt approaches maturity, which is a problem with many structural models. View this paper
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Articles (193)

  • Article
  • Open Access
4 Citations
2,263 Views
16 Pages

A Method for Transforming Non-Convex Optimization Problem to Distributed Form

  • Oleg O. Khamisov,
  • Oleg V. Khamisov,
  • Todor D. Ganchev and
  • Eugene S. Semenkin

9 September 2024

We propose a novel distributed method for non-convex optimization problems with coupling equality and inequality constraints. This method transforms the optimization problem into a specific form to allow distributed implementation of modified gradien...

  • Article
  • Open Access
7 Citations
8,034 Views
36 Pages

A Novel Hybrid Model (EMD-TI-LSTM) for Enhanced Financial Forecasting with Machine Learning

  • Olcay Ozupek,
  • Reyat Yilmaz,
  • Bita Ghasemkhani,
  • Derya Birant and
  • Recep Alp Kut

9 September 2024

Financial forecasting involves predicting the future financial states and performance of companies and investors. Recent technological advancements have demonstrated that machine learning-based models can outperform traditional financial forecasting...

  • Article
  • Open Access
1,093 Views
22 Pages

9 September 2024

One of the major issues facing commercial airlines is the time that it takes to board passengers. Further, most airlines wish to increase the number of trips that an aircraft can make between two or more cities. Thus, reducing the overall boarding ti...

  • Article
  • Open Access
1 Citations
1,065 Views
15 Pages

Reduction in Optimal Time in Systems with Input Redundancy

  • Zhongxing Peng,
  • Gengzhong Zheng and
  • Wei Huang

9 September 2024

This paper discusses a reduction in the optimal time due to the presence of input redundancy in time-optimal control problems. By introducing a non-idle channel to represent an active input channel, we establish the necessary and sufficient condition...

  • Article
  • Open Access
1,422 Views
13 Pages

Hybrid Fuzzy Method for Performance Evaluation of City Construction

  • Chun-Ming Yang,
  • Chang-Hsien Hsu,
  • Tian Chen and
  • Shiyao Li

9 September 2024

Evaluating the performance of city construction not only helps optimize city functions and improve city quality, but it also contributes to the development of sustainable cities. However, most of the scoring rules for evaluating the performance of ci...

  • Article
  • Open Access
1,648 Views
14 Pages

Few-Shot Learning Sensitive Recognition Method Based on Prototypical Network

  • Guoquan Yuan,
  • Xinjian Zhao,
  • Liu Li,
  • Song Zhang and
  • Shanming Wei

9 September 2024

Traditional machine learning-based entity extraction methods rely heavily on feature engineering by experts, and the generalization ability of the model is poor. Prototype networks, on the other hand, can effectively use a small amount of labeled dat...

  • Article
  • Open Access
2 Citations
2,506 Views
46 Pages

Enhanced Parameter Estimation of DENsity CLUstEring (DENCLUE) Using Differential Evolution

  • Omer Ajmal,
  • Shahzad Mumtaz,
  • Humaira Arshad,
  • Abdullah Soomro,
  • Tariq Hussain,
  • Razaz Waheeb Attar and
  • Ahmed Alhomoud

9 September 2024

The task of finding natural groupings within a dataset exploiting proximity of samples is known as clustering, an unsupervised learning approach. Density-based clustering algorithms, which identify arbitrarily shaped clusters using spatial dimensions...

  • Article
  • Open Access
1,504 Views
23 Pages

Design and Comparison of Fractional-Order Controllers in Flotation Cell Banks and Flotation Columns Used in Copper Extraction Processes

  • Manuel A. Duarte-Mermoud,
  • Abdiel Ricaldi-Morales,
  • Juan Carlos Travieso-Torres and
  • Rafael Castro-Linares

9 September 2024

This work explores efficiency improvements in the copper flotation stage, a complex nonlinear, multivariable process subject to numerous perturbations. The primary objective is to design a fractional-order PID (FOPID) control strategy and a fractiona...

  • Article
  • Open Access
1 Citations
1,208 Views
26 Pages

9 September 2024

We consider a two-group social conflict under the corporates’ research and development (R&D) business processes. Conflict participants are divided into two groups depending on their attitude to new ideas, technologies, and behavioral style...

  • Article
  • Open Access
5 Citations
1,313 Views
23 Pages

9 September 2024

Outliers are a common problem in applied statistics, together with multicollinearity. In this paper, robust Liu estimators are introduced into a partially linear model to combat the presence of multicollinearity and outlier challenges when the error...

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Mathematics - ISSN 2227-7390