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Limit Theory for Panel Data Models with Cross Sectional Dependence and Sequential Exogeneity
Panel Data Models Sequential Exogeneity
2015/9/22
The paper derives a general Central Limit Theorem (CLT) and asymptotic distributions for sample moments related to panel data models with large . The results allow for the data to be cross sec...
Limit Cycle Oscillations in CW Laser-Driven NEMS
Finite element method (FEM) laser drive limit cycle oscillation self-oscillation thermal stress
2015/8/27
Limit cycle, or self-oscillations, can occur in a variety of NEMS devices illuminated within an interference field. As the device moves within the field, the quantity of light absorbed and hence the r...
Perturbation analysis of entrainment in a micromechanical limit cycle oscillator
Resonance MEMS Bifurcation Perturbation
2015/8/27
We study the dynamics of a thermo-mechanical model for a forced disc shaped, micromechanical limit cycle oscillator.The forcing can be accomplished either parametrically, by modulating the laser beam ...
Dynamics of three coupled limit cycle oscillators with application to artificial intelligence
MEMS oscillators Associative memory Phase-locked motion Coupled oscillators
2015/8/27
We study a system of three limit cycle oscillators which exhibits two stable steady states. The system is modeled by both phase-only oscillators and by van der Pol oscillators. We obtain and compare t...
Entrainment of Micromechanical Limit Cycle Oscillators in the Presence of Frequency Instability
Limit cycles micromechanical devices optical resonators oscillators thermomechanical processes
2015/8/27
The nonlinear dynamics of micromechanical oscil-lators are explored experimentally. Devices consist of singly and doubly supported Si beams, 200nm thick and 35 μm long.When illuminated within a laser ...
Comparative Analysis of Computational Methods for Limit-Cycle Oscillations
Comparative Analysis Computational Methods Limit-Cycle Oscillations
2015/7/2
Various methods are explored in the computation of time-periodic solutions for autonomous systems. The purpose of the work is to illuminate the capabilities and limitations of methods, including a new...
Reduction of the Adjoint Gradient Formula in the Continuous Limit
Adjoint Gradient Formula Continuous Limit
2015/7/2
We present a new continuous adjoint method for Aerodynamic Shape Optimization (ASO) using the Euler equations, which reduces the computational cost of the gradi ents by reducing the volume integral pa...
Mesostructural Characterization and Probabilistic Modeling of the Design Limit States of Parallel Strand Lumber
Constitutive Modeling Finite Element Modeling Material Characterization Mechanics of Materials Parallel Strand Lumber (PSL) Probabilistic Mechanics
2014/11/4
Over recent decades, the public tendency toward using the structural composite lumber (SCL), a common composite of wood made of wood strands or veneers glued and compressed together, as structural mem...
Mesostructural Characterization and Probabilistic Modeling of the Design Limit States of Parallel Strand Lumber
Parallel Strand Lumber (PSL) Probabilistic
2014/10/31
Over recent decades, the public tendency toward using the structural composite lumber (SCL), a common composite of wood made of wood strands or veneers glued and compressed together, as structural mem...
Efficiency above the Shockley−Queisser Limit by Using Nanophotonic Effects To Create Multiple Effective Bandgaps With a Single Semiconductor
Photon management nanostructured solar cells Shockley− Queisser limit light trapping tandem solar cells
2015/8/6
We present a pure photonic approach to overcome the Shockley−Queisser limit. A single material can show different effective bandgap, set by its absorption spectrum, which depends on ...
Do context effects limit the usefulness of self-reported wellbeing measures?
context usefulness self-reported wellbeing measures
2014/3/17
Do context effects limit the usefulness of self-reported wellbeing measures?
Swimming by medusae Sarsia tubulosa in the viscous vortex ring limit
jet propulsion impulsive Stokeslet impulsive stresslet
2014/4/1
As organisms swim in their natural environment, they are constantly striving to forage successfully,
escape from predation, and search for mates to reproduce. At some stage in their life cycle, most ...
Slope Stability Evaluations by Limit Equilibrium and Finite Element Methods Applied to a Railway in the Moroccan Rif
Conventional Methods Finite Elements Safety Factor Slopes Stability
2013/1/31
Since 1930, the analysis of slope stability is done according to the limit equilibrium approach. Several methods were developed of which certain remain applicable because of their simplicity. However,...
The Kibble-Zurek Problem: Universality and the Scaling Limit
Kibble-Zurek nonequilibrium quench adiabatic
2012/2/27
Near a critical point, the equilibrium relaxation time of a system diverges and any change of control/thermodynamic parameters leads to non-equilibrium behavior. The Kibble-Zurek problem is to determi...
Fundamental limit of light trapping in grating structures
Solar Energy Nanophotonics and photonic crystals Diffraction and gratings
2015/8/10
We use a rigorous electromagnetic approach to analyze the fundamental limit of light-trapping enhancement in grating structures. This limit can exceed the bulk limit of 4n2, but has significant angula...