Buscar recursos académicos

This study presents the dynamical analysis and soliton solutions of the Chaffee–Infante equation, an important nonlinear evolution model. The Chaffee Infante equation, widely employed as a reaction–diffusion model, i...

Introduction. The stability of grid-connected inverters is critical for the integration of renewable energy into modern power systems. However, this stability is significantly challenged under weak grid conditions, chara...

Abstract This cross-sectional study of 2,250 hospital workers attempted to identify potential physiological risk structures for night workers by utilizing the nonlinear manifold learning framework. Unlike conventional me...

A comparative analysis of adsorption models application for the description of experimental isotherms of iron adsorption on two samples: natural bentonite and bentonite irradiated with microwave irradiation. Sorption iso...

Math anxiety undermines students’ motivation and achievement and is a pervasive challenge in mathematics education. Although prior studies have shown that cognitively demanding instruction is associated with lower anxi...

Both, a global isothermal temperature model and a nonlinear quadratic temperature model of the ISA was developed and presented here. Constrained optimization techniques in conjunction with the least-square-root approxima...

Differential equations are equations that relate a function to one or more of its derivatives. Nonlinear means that the equation is not directly proportional to the function and its derivatives. In other words, its varia...

BackgroundThe systemic immune-inflammation index (SII) has emerged as a widely studied inflammatory biomarker reflecting the balance between host inflammatory and immune status, although evidence in lung cancer patients ...

Background: In calibration, analytical figures of merit (AFOMs) are statistical parameters of great importance for method validation. In recent decades, relevant contributions have been made to estimate AFOMs in many cal...

Novel innovations in large language models (LLMs) have demonstrated their ability to generate and analyze literary texts. As a result of intricate semantic layers, metaphors, polyphony, and nonlinear narrative structures...

Objective To determine whether blood cadmium levels are associated with the likelihood of developing human papillomavirus infection in women aged 20–59 years. Methods In this cross-sectional study, we analyzed data fro...

Objective: This study aimed to investigate the association of body roundness index (BRI) with all-cause and cardiovascular mortality in patients with cardiovascular-kidney-metabolic (CKM) syndrome stages 0–3. Methods: ...

ABSTRACT Background Adolescents with type 1 diabetes (T1D) face premature atherosclerosis, but standard carotid intima‐media thickness (IMT) may lack sensitivity for the earliest vascular injuries. Since urinary albumi...

Achieving sustained economic growth while reducing carbon emissions remains a central challenge for China's sustainability transition. Despite the rapid expansion of renewable energy capacity and innovation activity, car...

Abstract Heart rate variability (HRV), regulated by the autonomic nervous system, is typically assessed using standard time-domain and frequency-domain methods to evaluate autonomic function. However, conventional linear...

Non-Gaussian quantum states of light are essential resources for quantum information processing and precision metrology. Among them, generalized coherent states (GCSs), which naturally arise from the evolution of a coher...

Nonlinear response conception in rotating machinery, particularly in systems with squeeze film dampers (SFDs), pose significant challenges for established time-domain numerical methods due to bifurcations and critical po...

A simple and robust nonlinear dilatation constitutive model with clear mechanics concept is introduced, and the stiffness coefficient matrix of constitutive relationship is presented. A kind of coarsed-grained soil is co...

Abstract BackgroundThe integration of robots into industrial settings has rapidly advanced, aiming to reduce human involvement in demanding tasks while improving overall efficiency. As collaborative robots (c...

Introduction According to modern scholars (N. Maslova, B. Astafiev), one of the important reasons for the global planetary crisis, including modern educational system in particular, is violation of the conformity of natu...

BackgroundAs markers of inflammation and oxidative stress, immune cells and high-density lipoprotein cholesterol (HDL-c) derivative markers, such as the monocyte to HDL-c ratio (MHR) and lymphocyte to HDL-c ratio (LHR), ...

The kidney is a primary organ of heavy metal accumulation, and metal toxicity poses a great challenge to kidney health. We conducted a repeated-measure study to examine the longitudinal associations between blood heavy m...

BackgroundSystemic immune-inflammatory imbalance plays a potential role in the development of diabetic macular edema (DME). The lymphocyte-to-high-density lipoprotein ratio (LHR) can reflect the systemic immune-inflammat...

Abstract This model is highly helpful in thermal management and complex energy systems, particularly where precise control over heat and mass transfer is required. Solarized nanofluids can be used to improve heat absorpt...