Results 51 to 60 of about 74,838 (223)

Advanced control of non‐isothermal axial dispersion tubular reactors with recycle‐induced state delay

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract We develop a delay‐aware estimation and control framework for a non‐isothermal axial dispersion tubular reactor modelled as a coupled parabolic‐hyperbolic PDE system with recycle‐induced state delay. The infinite‐dimensional dynamics are preserved without spatial discretization by representing the delay as a transport PDE and adopting a late ...
Behrad Moadeli, Stevan Dubljevic
wiley   +1 more source

Invariant Measure and Universality of the 2D Yang–Mills Langevin Dynamic

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT We prove that the Yang–Mills (YM) measure for the trivial principal bundle over the two‐dimensional torus, with any connected, compact structure group, is invariant for the associated renormalised Langevin dynamic. Our argument relies on a combination of regularity structures, lattice gauge‐fixing and Bourgain's method for invariant measures ...
Ilya Chevyrev, Hao Shen
wiley   +1 more source

Simulating causal collapse models

, 2004
We present simulations of causal dynamical collapse models of field theories on a 1+1 null lattice. We use our simulations to compare and contrast two possible interpretations of the models, one in which the field values are real and the other in which ...
Beckman D, Bell J, Bell J, Blute R F, Diosi L Milburn G, Dowker F, Dowker F Henson J Sorkin R D, Fay Dowker, Ghirardi G, Ghirardi G C, Hawkins E, Isabelle Herbauts, Kent A, Meyer D A, Nakano A, Pearle P, Pearle P, Rideout D P, Samols T M, Sorkin R   +19 more
core   +3 more sources

The Benjamin–Ono Equation in the Zero‐Dispersion Limit for Rational Initial Data: Generation of Dispersive Shock Waves

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT The leading‐order asymptotic behavior of the solution of the Cauchy initial‐value problem for the Benjamin–Ono equation in L2(R)$L^2(\mathbb {R})$ is obtained explicitly for generic rational initial data u0$u_0$. An explicit asymptotic wave profile uZD(t,x;ε)$u^\mathrm{ZD}(t,x;\epsilon)$ is given, in terms of the branches of the multivalued ...
Elliot Blackstone, Louise Gassot, Patrick Gérard, Peter D. Miller   +3 more
wiley   +1 more source

The Phoenix Project: Master Constraint Programme for Loop Quantum Gravity

, 2003
The Hamiltonian constraint remains the major unsolved problem in Loop Quantum Gravity (LQG). Seven years ago a mathematically consistent candidate Hamiltonian constraint has been proposed but there are still several unsettled questions which concern the ...
Ambjorn J Jurkiewicz J Loll R, Antonsen F Markopoulou F, Arnol'd V I, Arnol'd V I, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A Bojowald M Lewandowski J, Ashtekar A Fairhurst S Willis J L, Ashtekar A Lewandowski J Sahlmann H, Baez J C, Baez J C, Baez J C, Barrett J W, Biggs N, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M Perez A, Borissov R, Brunnemann J, Brunnemann J Giesel K Thiemann T, Brunnemann J Thiemann T, Carlip S, Cornfeld I P, Deser S, Deser S, Di Bartolo C, Di Bartolo C, Di Bartolo C, Dittrich B, Dittrich B, Dittrich B, Dittrich B, Dittrich B, Dittrich B Thiemann T, Dittrich B Thiemann T, Gambini R, Gambini R, Gambini R Porto R A Pullin J, Gambini R Pullin J, Gambini R Pullin J, Gaul M, Gel'fand I M, Giulini D, Giulini D, Glimm J, Klauder J, Lewandowski J, Loll R, Loll R, Markopoulou F, Markopoulou F, Okolow A Lewandowski J, Perez A, Renteln P, Rovelli C, Rovelli C, Sahlmann H Thiemann T, Sahlmann H Thiemann T, Sahlmann H Thiemann T, Sahlmann H Thiemann T, Smolin L, T Thiemann, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thirring W   +83 more
core   +2 more sources

Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati, Augusto Del Zotto, Klaus Widmayer   +2 more
wiley   +1 more source

Daily Body (Dis‐)Satisfaction and Dietary Restriction in Women Across the Eating Disorder Spectrum

International Journal of Eating Disorders, EarlyView.
ABSTRACT Objective Body dissatisfaction is a key risk factor in eating disorder development: It is theorized to promote dietary restriction, thereby contributing to symptom onset. Evidence for this pathway primarily comes from cross‐sectional or multi‐wave questionnaire studies in bulimia nervosa (BN) and anorexia nervosa (AN).
Michaela R. Buehler, Ann‐Kathrin Arend, Julia Reichenberger, Jens Blechert   +3 more
wiley   +1 more source

Convergence of Galerkin approximations for operator Riccati equations: A nonlinear evolution equation approach [PDF]

An approximation and convergence theory was developed for Galerkin approximations to infinite dimensional operator Riccati differential equations formulated in the space of Hilbert-Schmidt operators on a separable Hilbert space.
Rosen, I. G.
core   +1 more source

Applications of Canonical Transformations

, 2004
Canonical transformations are defined and discussed along with the exponential, the coherent and the ultracoherent vectors. It is shown that the single-mode and the $n$-mode squeezing operators are elements of the group of canonical transformations.
Bargmann V, Berezin F A, Bogoliubov N, Dekker H, Joachim Kupsch, Joos E, Kim Y S, Kupsch J, Kupsch J Banerjee S, Milburn G J, Ottesen J T, Schroer B, Schumacher B L, Shale D, Steane A M, Subhashish Banerjee, van Hove L   +16 more
core   +1 more source

Seizure forecasting with epilepsy cycles: On the causality of forecasting pipelines

Epilepsia, EarlyView.
Abstract Objective Seizure risk is modulated by multiscale brain rhythms. Previous studies using cycles in electroencephalography, heart rate, and wearable data suggest the possibility of forecasting seizures days in advance. However, they commonly rely on methods requiring (days of) information from time points beyond the moment of forecast (noncausal
Hongliu Yang, Jens Müller, Sotirios Kalousios, Georg Leonhardt, Matthias Dümpelmann, Andreas Schulze‐Bonhage, Ronald Tetzlaff   +6 more
wiley   +1 more source