Results 21 to 30 of about 2,148 (198)

Study of the regulatory elements of the Ovalbumin gene promoter using CRISPR technology in chicken cells [PDF]

open access: yesJournal of Biological Engineering, 2023
Background Hormone-dependent promoters are very efficient in transgene expression. Plasmid-based reporter assays have identified regulatory sequences of the Ovalbumin promoter that are involved in response to estrogen and have shown that the deletion of ...
Sara Yousefi Taemeh   +6 more
doaj   +2 more sources

Dynamics and Control of a Tethered Satellite System Based on the SDRE Method

open access: yesInternational Journal of Aerospace Engineering, 2016
This paper presents the nonlinear dynamic modeling and control of a tethered satellite system (TSS), and the control strategy is based on the state-dependent Riccati equation (SDRE).
Yong-Lin Kuo
doaj   +2 more sources

A Modified SDRE-based Sub-optimal Hypersurface Design in SMC [PDF]

open access: yes, 2020
Sliding Mode Control (SMC) plays a prominent role in dealing with matched uncertainties. In classical SMC design, the sliding surface (SS) is crucial to the guarantee for the stability and desired performance, especially if the system is nonlinear.
Copur, Engin H.   +5 more
core   +1 more source

State Dependent Riccati Equation Based Rotor-Side Converter Control for Doubly Fed Wind Generator

open access: yesIEEE Access, 2018
This paper proposes a rotor-side converter (RSC) control of doubly fed induction generator (DFIG) through state-dependent Riccati equation (SDRE) approach to enhance the low voltage ride through (LVRT) ability.
Boyu Qin, Haoyuan Sun
doaj   +1 more source

Modified Infinite-Time State-Dependent Riccati Equation Method for Nonlinear Affine Systems: Quadrotor Control

open access: yesApplied Sciences, 2021
This paper presents modeling and infinite-time suboptimal control of a quadcopter device using the state-dependent Riccati equation (SDRE) method. It establishes a solution to the control problem using SDRE and proposes a new procedure for solving the ...
Sławomir Stępień   +1 more
doaj   +1 more source

A Class of SDRE-RRT Based Kinodynamic Motion Planners [PDF]

open access: yes2018 Annual American Control Conference (ACC), 2018
A variety of LQR-RRT kinodynamic motion planners are built on the idea of solving a two point boundary value problem in an LQR manner for affine systems. These planners can also be used for controllable nonlinear systems only if its linearized model at the equilibrium state is also controllable, and the cost function reflects only a time/control trade ...
Adnan Tahirovic, Faris Janjos
openaire   +1 more source

Research on Control Method of Keeping Flight Formation by Using SDRE on the Sun-Earth Libration Points

open access: yesAdvances in Astronomy, 2017
Keeping the flying formation of spacecraft is a key problem which needs to be solved in deep space exploration missions. In this paper, the nonlinear dynamic model of formation flying is established and a series of transformations are carried out on this
He Zhenqi, Zhang Ke, Lv Meibai
doaj   +1 more source

Integrated Control and Protection Architecture for Islanded PV-Battery DC Microgrids: Design, Analysis and Experimental Verification

open access: yesApplied Sciences, 2020
Direct current (dc) microgrids have gained significant interest in research due to dc generation/storage technologies—such as photovoltaics (PV) and batteries—increasing performance and reducing in cost. However, proper protection and control systems are
Ali Abdali   +2 more
doaj   +1 more source

Disturbance Rejection of IPMSM Drives by Simplified Taylor Series-Based Near Optimal Control Scheme in Wide Speed Range

open access: yesIEEE Access, 2019
This paper proposes a simplified near optimal control (NOC) scheme to reject the disturbances of interior permanent magnet synchronous motor (IPMSM) drives by minimizing the complex calculations in the Taylor series method required for solving the state ...
Muhammad Saad Rafaq   +3 more
doaj   +1 more source

Sediment delivery ratio of single flood events and the influencing factors in a headwater basin of the Chinese Loess Plateau.

open access: yesPLoS ONE, 2014
Little is known about the sediment delivery of single flood events although it has been well known that the sediment delivery ratio at the inter-annual time scale is close to 1 in the Chinese Loess Plateau.
Mingguo Zheng, Yishan Liao, Jijun He
doaj   +1 more source

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