Results 61 to 70 of about 50,043 (267)

Topology‐Orchestrated Multi‐physical Energy Control in Turtle Shell‐Inspired Metamaterials

Advanced Materials, EarlyView.
A turtle shell‐inspired lattice metamaterial efficiently manages acoustic, fluid‐thermal, and mechanical energy flows simultaneously. The unique hybrid‐coupling architecture achieves superior sound attenuation via pore‐cavity resonance, facilitates effective airflow transport, and maximizes mechanical energy absorption through multistage cell ...
Xi Wang, Shiyi Wang, Bingzhi Chen, Xinwei Li   +3 more
wiley   +1 more source

Parameter Estimation for the Linear Self-Attracting Diffusion Processes

Mathematics
In this paper, we investigate parameter estimation for a class of linear self-attracting diffusion processes. Specifically, we consider processes with a drift coefficient given by −θ∫0t(Xt−Xu)du.
Xuejiao Li, Wei Wang
doaj   +1 more source

The Asymptotic Distribution of Serial Covariances

The Annals of Statistics, 1976
A central limit theorem is proved for the sample serial covariances of an ergodic, stationary, purely nondeterministic process whose linear innovations have their first four moments as for a sequence of independent random variables. The necessary and sufficient condition for the theorem is then that the spectra be square integrable.
openaire   +3 more sources

A High‐Resolution THz‐PCF Sensing Framework: Precise Identification of Food Preservatives Through Refractive Index Analysis

Advanced Materials Interfaces, EarlyView.
As presented in the graphical abstract, it depicts an image of a terahertz photonic crystal fiber (THz‐PCF) sensor with a polygonal shape in the core, which is filled with an analyte, and air slots in the cladding. The THz waves will travel through the fiber, and due to increased light‐matter interaction in the sensing region, changes in refractive ...
T. H. M. Sumon Rashid, Md. Nayem Hossain, Md. Golam Kibria, A. H. M. Iftekharul Ferdous, Jabin Tasnin Upoma, Md. Lalon Hossain, Sajad Ali   +6 more
wiley   +1 more source

The Asymptotic Distribution of Extreme Sums

The Annals of Probability, 1991
Let \(X_{1,n}\leq\ldots\leq X_{n,n}\) be the order statistics of \(n\) independent random variables with a common distribution \(F\), and let \(T_ n=X_{n,n}+\ldots+X_{n+1-k(n),n}\), where \(\{k(n)\}\) is a sequence of positive integers such that \(k(n)\rightarrow\infty\) and \(k(n)/n\rightarrow\alpha\) as \(n\rightarrow\infty\), with \(0\leq\alpha0 ...
Csorgo, Sandor, Haeusler, Erich, Mason, David M.   +2 more
openaire   +2 more sources

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

Advanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel, Bastian Jülich, Anna Rosa Ziefuss, Florian Eibl, Stephan Barcikowski   +4 more
wiley   +1 more source

Strong Coupling in all‐Polymer Planar Microcavities

Advanced Optical Materials, EarlyView.
Strong Coupling has been achieved in an all‐polymer microcavity with dielectric contrast Δn = 0.33 doped with TDBC. A Rabi splitting of 39 meV has been measured opening novel perspectives for polymer photonics. ABSTRACT In this work, strong coupling effect is observed in all‐polymer planar microcavities incorporating TDBC J‐aggregates dispersed into ...
Daniela Di Fonzo, Andrea Lanfranchi, Giovanni Manfredi, Maddalena Patrini, Paola Lova, Davide Comoretto   +5 more
wiley   +1 more source

Testing proportional hazards for specified covariates

Modern Stochastics: Theory and Applications, 2019
Tests for proportional hazards assumption concerning specified covariates or groups of covariates are proposed. The class of alternatives is wide: log-hazard rates under different values of covariates may cross, approach, go away.
Vilijandas Bagdonavičius, Rūta Levulienė   +1 more
doaj   +1 more source

Backpropagation Through Soft Body: Investigating Information Processing in Brain–Body Coupling Systems

Advanced Robotics Research, EarlyView.
This study explores how information processing is distributed between brains and bodies through a codesign approach. Using the “backpropagation through soft body” framework, brain–body coupling agents are developed and analyzed across several tasks in which output is generated through the agents’ physical dynamics.
Hiroki Tomioka, Katsuma Inoue, Yasuo Kuniyoshi, Kohei Nakajima   +3 more
wiley   +1 more source

Testing Homogeneity for Poisson Processes Prueba de homogeneidad para procesos de Poisson

Revista Colombiana de Estadística, 2011
We developed an asymptotically optimal hypothesis test concerning the homogeneity of a Poisson process over various subintervals. Under the null hypothesis, maximum likelihood estimators for the values of the intensity function on the subintervals are ...
ALEJANDRA TAPIA, RAÚL FIERRO
doaj