Results 61 to 70 of about 2,196,852 (174)
IEEE Access, 2020 In this paper, a novel fixed-time nonsingular fast terminal sliding mode control incorporating with an adaptive disturbance observer is proposed for second-order uncertain nonlinear systems to achieve fast stabilization and robust control.
Huihui Pan +3 more
doaj +1 more source
Unobserved individual and firm heterogeneity in wage and tenure functions: evidence from German linked employer-employee data [PDF]
, 2007 We estimate wage and job tenure functions that include individual and firm effects capturing time-invariant unobserved worker and firm heterogeneity using German linked employer-employee data (LIAB data set).
Cornelissen, T., Hubler, O.
core
The Orbital Stability of Planets Trapped in the First-Order Mean-Motion Resonances
, 2012 Many extrasolar planetary systems containing multiple super-Earths have been discovered. N-body simulations taking into account standard type-I planetary migration suggest that protoplanets are captured into mean-motion resonant orbits near the inner ...
Ida, Shigeru +2 more
core +1 more source
A fast fixed-time backstepping control method for systems with mismatched disturbances
Advances in Mechanical EngineeringIn this paper, a fast fixed-time backstepping control approach is developed for systems with mismatched disturbances. A novel fast fixed-time disturbance observer (FFTDO), which is convergent within fixed time regardless of initial conditions, is ...
Huihui Pan, Hongwei Zhang, Peng Gao
doaj +1 more source
Selection theorem for systems with inheritance
, 2007 The problem of finite-dimensional asymptotics of infinite-dimensional dynamic systems is studied. A non-linear kinetic system with conservation of supports for distributions has generically finite-dimensional asymptotics.
Gorban, A. N.
core +1 more source
Journal of Marine Science and EngineeringAiming at the robust path-following control problem of underwater snake robot (USR) systems subject to modeling uncertainties and time-varying external disturbances, this paper proposes a robust path-following control algorithm based on a fast fixed-time
Qingqing Shi, Jing Liu, Xiao Han
doaj +1 more source
A moving mesh method with variable relaxation time
, 2006 We propose a moving mesh adaptive approach for solving time-dependent partial differential equations. The motion of spatial grid points is governed by a moving mesh PDE (MMPDE) in which a mesh relaxation time \tau is employed as a regularization ...
Adjerid +20 more
core +1 more source
ISSUES WITH A CHAINED-TYPE PRICE INDEX: AN ANALYSIS WITH THE PRODUCER PRICE INDEX [PDF]
Regarding the recent switch from the fixed base price index to the chained-type price index in many countries, we examine important issues including the selection of the weight to produce more accurate chained-type price indices and to maintain ...
Cheolbeom Park, Deockhyun Ryu
core
Transverse instability of dunes
, 2011 The simplest type of dune is the transverse one, which propagates with invariant profile orthogonally to a fixed wind direction. Here we show numerically and with a linear stability analysis that transverse dunes are unstable with respect to along-axis ...
Eric J. R. Parteli +4 more
core +1 more source
AIMS MathematicsThis study investigates the fixed-time control problem for a class of second-order nonlinear systems. Acknowledging that most existing fixed-time sliding mode controllers encounter singularity issues, this paper aims to design a non-singular fixed-time ...
Zhiqiang Chen +1 more
doaj +1 more source