Results 61 to 70 of about 53,622 (251)

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Ανάλυση και έλεγχος φωτοβολταϊκού συστήματος συνδεδεμένου σε DC φορτίο και στο δίκτυο μέσω μετατροπέων [PDF]

, 2014
Σκοπός της παρούσας εργασίας είναι ο έλεγχος και η ανάλυση ευστάθειας ενός φωτοβολταϊκού (Φ/Β) συστήματος που παρέχει ηλεκτρική ισχύ σε ένα τοπικό, μεταβαλλόμενο φορτίο συνεχούς ρεύματος και στο ηλεκτρικό δίκτυο μέσω μετατροπέων ισχύος.
Pappas, Vasileios L., Παππάς, Βασίλειος Λ.   +1 more
core   +1 more source

Record Performance in Vertically Stacked, Solution‐Processed ZTO Schottky Diodes

Advanced Materials Technologies, EarlyView.
Schottky diodes based on solution processed sustainable zinc—tin–oxide thin films present an eco‐friendly and versatile alternative to conventional CMOS based technologies. Beyond state‐of‐the‐art performance for vertically stacked solution‐based oxide diodes was achieved, including rectification ratios exceeding nine orders of magnitude, and intrinsic
Carlos Silva, Asal Kiazadeh, Raquel Azevedo Martins, António Dias, Jorge Martins, Luís Mendes, João Vaz, Rodrigo Martins, Elvira Fortunato, Emanuel Carlos, Jonas Deuermeier   +10 more
wiley   +1 more source

Nonlinear model predictive control applied to spacecraft attitude control (Closed-loop stability and optimality with thrusters and wheels)

Nihon Kikai Gakkai ronbunshu, 2016
This paper studies model predictive control (MPC) for spacecraft nonlinear attitude control with actuator input nonlinearities. This technology is important to achieve high-rate large angle attitude maneuver problems of recent spacecraft missions.
Atsushi SAKAMOTO, Yuichi IKEDA, Isao YAMAGUCHI, Takashi KIDA   +3 more
doaj   +1 more source

Experimental Study of Robust Output-Based Continuous Sliding-Modes Controllers for Van der Pol Oscillator [PDF]

, 2018
Robust output tracking control of Van der Pol oscillator is an important practical problem from an application point of view. Output feedback based robust tracking control strategies are proposed in this work for that purpose. First, a High-Order Sliding-
Ahmed, Hafiz, Ríos, Héctor
core   +1 more source

Skin‐Like Tri‐Modal Sensors Based on Soft Piezoelectric and Ionic Composites

Advanced Materials Technologies, EarlyView.
Inspired by the multimodal perception of human skin, a soft, skin‐like tri‐modal sensor is presented. The device incorporates an ionically conductive, piezoelectric, elastic composite as its active layer, enabling independent detection of temperature, static strain, and dynamic strain within a single two‐terminal architecture.
Liren Wang, Peter Zalar, Vishva Bhate, Takeo Furukawa, Hidekazu Kodama, Yijun Liu, Yuanyuan Zhou, Chuang Hou, Siyuan Liu, Naoji Matsuhisa   +9 more
wiley   +1 more source

Miniaturized Magnetic Tip Design for Endoluminal Vine Robot Navigation

Advanced Robotics Research, EarlyView.
A magnetic tip mount is designed for a miniaturized 7 mm soft‐growing vine robot to enable wireless magnetic steering and onboard imaging, while preserving a 3 mm working channel. The internal–external ring magnets design balances magnetic attachment with low eversion pressure. Experiments demonstrate ±90° steering, 34 mm bending radius, and successful
Andrea Yanez Trujillo, Joshua Davy, James H. Chandler, James Avery, Pietro Valdastri   +4 more
wiley   +1 more source

Input-to-State Stability for Dynamical Neural Networks with Time-Varying Delays

Abstract and Applied Analysis, 2012
A class of dynamical neural network models with time-varying delays is considered. By employing the Lyapunov-Krasovskii functional method and linear matrix inequalities (LMIs) technique, some new sufficient conditions ensuring the input-to-state ...
Weisong Zhou, Zhichun Yang
doaj   +1 more source

Stability analysis of DFIG-based wind turbine via input to state stability theory

电力工程技术, 2022
As the installed capacity of wind power generation is increasing continuously,analysis of the impacts on the voltage stability of power system during and after faults is important for the stable operation of power systems.
WANG Ruogu, LI Hengyi, GAO Xin, GUO Ning, DAI Liseng   +4 more
doaj   +1 more source

From Lab to Landscape: Environmental Biohybrid Robotics for Ecological Futures

Advanced Robotics Research, EarlyView.
This Perspective explores environmental biohybrid robotics, integrating living tissues, microorganisms, and insects for operation in real‐world ecosystems. It traces the leap from laboratory experiments to forests, wetlands, and urban environments and discusses key challenges, development pathways, and opportunities for ecological monitoring and ...
Miriam Filippi
wiley   +1 more source