Results 41 to 50 of about 9,586,445 (221)
Copula‐based joint modelling of emergency department visits with time‐varying dependence
Canadian Journal of Statistics, EarlyView.Abstract Jointly modelling multiple correlated count time series is essential in health services research, where outcomes like emergency visits for mental health and substance use often evolve together. Ignoring these dependencies can obscure meaningful trends and limit the effectiveness of policy evaluation.
Guanjie Lyu, Cindy Feng, Lihui Liu
wiley +1 more source
Journal of Forecasting, EarlyView.ABSTRACT This paper presents a method for forecasting limit order book durations using a self‐exciting flexible residual point process. High‐frequency events in modern exchanges exhibit heavy‐tailed interarrival times, posing a significant challenge for accurate prediction.
Kyungsub Lee
wiley +1 more source
(R1961) On Fuzzy Upper and Lower Theta Star Semicontinuous Multifunctions [PDF]
, 2022 This work introduces the concepts of fuzzy upper and lower theta star (respectively theta)- semicontinuous multifunction on fuzzy topological spaces in the Sostak sense.
Vadivel, A. +2 more
core +1 more source
Exact Robust Filtering and Differentiation Based on Sliding Modes and Homogeneity
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This article addresses the problem of online estimation of the derivatives of a signal corrupted by measurement noise. The measured signal is modeled as the sum of a smooth nominal component and a uniformly bounded noise term. A key objective is to attenuate the effect of high‐frequency noise.
Jaime A. Moreno, Arie Levant
wiley +1 more source
On the lower semicontinuity of supremal functional under differential constraints [PDF]
ESAIM: Control, Optimisation and Calculus of Variations, 2015 Given \(\Omega\) a bounded open subset of \({\mathbb R}^N\), \(V \in L^{\infty}(\Omega; {\mathbb M}^{d \times N})\), where \({\mathbb M}^{d \times N}\) is the space of \(d \times N\) matrices with real coefficients, and a partial differential operator \[ {\mathcal A} V := \sum_{i = 1}^N A^{(i)} \frac{\partial V}{\partial x_i}, \, \qquad V : \Omega \to {
Ansini, Nadia, PRINARI, Francesca Agnese
openaire +4 more sources
High‐Order Sliding‐Mode control for MIMO Systems
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This paper extends Lyapunov‐based homogeneous high‐order sliding‐mode control to a class of uncertain non‐square multi‐input multi‐output (MIMO) nonlinear systems with a well‐defined vector relative degree. The considered systems admit a normal‐form representation with an uncertain but full‐row‐rank input‐gain matrix.
Jaime A. Moreno, Angel Mercado‐Uribe
wiley +1 more source
Perfect-information games with lower-semicontinuous payoffs [PDF]
, 2010 We prove that every multiplayer perfect-information game with bounded and lower-semicontinuous payoffs admits a subgame-perfect epsilon-equilibrium in pure strategies. This result complements Example 3 in Solan and Vieille [Solan, E., N. Vieille.
Kuipers, J. +11 more
core +2 more sources
Common Fixed Point of Multivalued Generalized φ-Weak Contractive Mappings
Fixed Point Theory and Applications, 2010 Fixed point and coincidence results are presented for multivalued generalized φ-weak contractive mappings on complete metric spaces, where φ:[0,+∞)→[0,+∞) is a lower semicontinuous function with φ(0)=0 and ...
Behzad Djafari Rouhani, Sirous Moradi
doaj +1 more source
Allergy, EarlyView.Young children (0–9 years) and residents of urban areas appeared particularly vulnerable to respiratory allergy development and exacerbation. Incidence showed nonlinear associations with PM10, PM2.5, temperature, and alder/birch pollen, while DPMR showed similar patterns, except for NO2 and the interaction O3*NO2.
Trang Dao‐Siebel +6 more
wiley +1 more source
On the Differences of Lower Semicontinuous Functions
Real Analysis Exchange, 2016 Answering one of the real function problems suggested by A. Maliszewski, the existence of a bounded Darboux function of the Sierpinski first class which cannot be expressed as a difference of two bounded lower semicontinuous functions is proved. As the reply to the other Maliszewski question, we show there exists an almost everywhere continuous Darboux
openaire +2 more sources