Understanding Stochastic Volatility and Its Impact on Asset Pricing

Stochastic volatility is the unpredictable nature of asset price volatility over time. It's a flexible alternative to the Black Scholes' constant volatility assumption.

NIO: A Few Reasons To Believe Breakeven Remains Close

NIO stock looks oversold vs business progress. Q3 2025 shows operating leverage, margin/mix gains and cost discipline guiding ...
thorax.bmj

Development and validation of PRECISE-X model: predicting first severe exacerbation in COPD

Objectives In patients with chronic obstructive pulmonary disease (COPD), severe exacerbations (ECOPDs) impose significant morbidity and mortality. Current guidelines emphasise using ECOPD history to ...
eLife

Continuous developmental changes in word recognition support language learning across early childhood

This is an important contribution that largely confirms prior evidence that word recognition - a cornerstone of development - improves across early childhood and is related to vocabulary growth. This ...
IEEE

Estimation of Random Mobility Models using the Expectation-Maximization Method

Abstract: Random mobility models (RMMs) capture the statistical movement characteristics of mobile agents, and have been widely used for the evaluation and design of mobile wireless networks. In many ...
IEEE

An Enhanced EWMA Chart with Variable Sampling Interval based on Expected Average Time to Signal

Abstract: The auxiliary information based variable sampling interval Exponentially Weighted Moving Average (VSI EWMA AI) chart, which combines the EWMA AI chart with the variable sampling interval ...