Results 21 to 30 of about 339,215 (316)

Methods of Ensuring Invariance with Respect to External Disturbances: Overview and New Advances

Mathematics, 2021
In this paper, we carry out a demonstration and comparative analysis of known methods of the synthesis of various control laws ensuring the invariance of the output (controlled) variable with respect to external disturbances under various assumptions ...
Aleksey Antipov, Svetlana Krasnova, Victor Utkin   +2 more
doaj   +1 more source

Circuit Implementation of a Modified Chaotic System with Hyperbolic Sine Nonlinearities Using Bi-Color LED

Technologies, 2021
In this paper, a chaotic three dimansional dynamical system is proposed, that is a modification of the system in Volos et al. (2017). The new system has two hyperbolic sine nonlinear terms, as opposed to the original system that only included one, in ...
Christos K. Volos, Lazaros Moysis, George D. Roumelas, Aggelos Giakoumis, Hector E. Nistazakis, George S. Tombras   +5 more
doaj   +1 more source

Nonlinear robust hierarchical control for nonlinear uncertainsystems [PDF]

Mathematical Problems in Engineering, 1999
A nonlinear robust control‐system design framework predicated on a hierarchical switching controller architecture parameterized over a set of moving nominal system equilibria is developed. Specifically, using equilibria‐dependent Lyapunov functions, a hierarchical nonlinear robust control strategy is developed that robustly stabilizes a given nonlinear
Leonessa, Alexander, Haddad, Wassim M., Chellaboina, Vijaysekhar   +2 more
openaire   +1 more source

IoT-Based Heartbeat Rate-Monitoring Device Powered by Harvested Kinetic Energy

Sensors
Remote patient-monitoring systems are helpful since they can provide timely and effective healthcare facilities. Such online telemedicine is usually achieved with the help of sophisticated and advanced wearable sensor technologies.
Olivier Djakou Nekui, Wei Wang, Cheng Liu, Zhixia Wang, Bei Ding   +4 more
doaj   +1 more source

Recursive Minimum Complex Kernel Risk-Sensitive Loss Algorithm

Entropy, 2018
The maximum complex correntropy criterion (MCCC) has been extended to complex domain for dealing with complex-valued data in the presence of impulsive noise.
Guobing Qian, Dan Luo, Shiyuan Wang
doaj   +1 more source

Study on the ultra-wide band gap characteristics of novel star-shaped chiral metamaterials

Hangkong gongcheng jinzhan
The suppression of vibration and noise has always been an important issue in engineering，and metamaterials have shown significant application value in vibration and noise reduction.
WANG Shuo, YAN Qun, YAN Hao, SUN Yongtao, WANG Anshuai, ZHANG Zhaozhan, DING Qian, WANG Liang   +7 more
doaj   +1 more source

A priori error estimates of finite volume element method for bilinear parabolic optimal control problem

AIMS Mathematics, 2023
In this paper, we study the finite volume element method of bilinear parabolic optimal control problem. We will use the optimize-then-discretize approach to obtain the semi-discrete finite volume element scheme for the optimal control problem. Under some
Zuliang Lu, Ruixiang Xu, Chunjuan Hou, Lu Xing   +3 more
doaj   +1 more source

Parametric Characteristics and Bifurcation Analysis of Multi-Degree-of-Freedom Micro Gyroscope with Drive Stiffness Nonlinearity

Micromachines, 2019
The dynamic equations of a four-degree-of-freedom micro gyroscope system were developed considering the nonlinearity of driving stiffness, the primary resonance, and the 1:1 internal resonance.
Mingjiang Han, Qichang Zhang, Shuying Hao, Weixiong Li   +3 more
doaj   +1 more source

Hard constraints in control state variables of multivariable nonlinear processes resolved by elementary nonlinear decoupling [PDF]

Modeling, Identification and Control, 1998
A model based control strategy for nonlinear multivariable processes having hard constraints on both control and state variables, is derived based upon the concept of Elementary Nonlinear Decoupling (END). In END a property space is defined which has the
Jens G. Balchen, Bjarne Sandrib
doaj   +1 more source

The Caenorhabditis elegans DPF‐3 and human DPP4 have tripeptidyl peptidase activity

FEBS Letters, EarlyView.
The dipeptidyl peptidase IV (DPPIV) family comprises serine proteases classically defined by their ability to remove dipeptides from the N‐termini of substrates, a feature that gave the family its name. Here, we report the discovery of a previously unrecognized tripeptidyl peptidase activity in DPPIV family members from two different species.
Aditya Trivedi, Rajani Kanth Gudipati
wiley   +1 more source