Results 81 to 90 of about 18,440 (267)

Contributions to Leak and Air Pocket Detection Using Transient Pressure Signals

Engineering Proceedings
This study presents insights into how existing faults in pipe systems, like leaks and air pockets, modify transient pressure waves in terms of shape, damping, and phase shift, based on experimental tests conducted at the Hydraulics Laboratory of the ...
Dídia Covas, Marta Cabral, João Paulo Ferreira, Helena Ramos   +3 more
doaj   +1 more source

Omnidirectional Ultra‐Broadband Cu/TiO2 Metasurface Absorbers for High‐Efficiency Solar Thermal Conversion and Photothermal Plasmon‐Driven Catalysis

Advanced Optical Materials, EarlyView.
Metasurface shows selective solar–thermal energy conversion with high‐activity solar/laser‐driven chemistry. The breakthrough is co‐designing broadband FP‐cavity + plasmonic LSPR/SLR resonances in an ultra‐thin metamaterial so that it not only harvests the most efficient proportion of solar radiation but also suppresses mid and IR emissivity. Moreover,
Samira Mehrabi, HaoYu Zhang, Narendra Chaulagain, Edgar Acosta, Nazir P. Kherani   +4 more
wiley   +1 more source

Adaptive Damping PTO Control of Wave Energy Converter for Irregular Waves Supported by Wavelet Transformation

Energies
The power take-off (PTO) control strategy plays a crucial role in the heave response and power absorption of wave energy converters (WECs). This paper presents an adaptive damping PTO system to increase the power absorption of an oscillating-float WEC ...
Runhua He, Guanghua He, Penglin Jing, Zhengxiao Luan, Chaogang Liu   +4 more
doaj   +1 more source

Phonon Polariton Confinement in Isotopically Pure MOVPE‐Grown BN Triangles

Advanced Optical Materials, EarlyView.
Phonon polaritons are confined in MOVPE‐grown isotopically pure 10BN$^{10}{\rm BN}$ triangles. The resonator modes are excited and mapped by near‐field spectroscopy. Through scanning a wide infrared frequency range and modeling, the polariton dispersion relation is retrieved.
Maximilian Scharpey, Oskar Schröer, Daniel Wigger, Lena Miler, Jakub Iwański, Andrzej Wysmołek, Johannes Binder, Iris Niehues   +7 more
wiley   +1 more source

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

Exploring vibrational resonance in biophysical systems with fractional-order damping

Journal of Nigerian Society of Physical Sciences
Vibrational Resonance (VR), which is characterised by the enhancement of the maximum response of a weakly driven system’s output signal induced by a high-frequency (HF) periodic signal, was numerically examined in a bi-harmonically driven dimensionless ...
T. O. Roy-Layinde, K. O. Olonade, K. A. Omoteso, H. T. Oladunjoye, B. A. Oyero, J. A. Laoye   +5 more
doaj   +1 more source

Strong‐Magnetic Flexible Composites for Magnetically Responsive Soft Robots

Advanced Robotics Research, EarlyView.
This perspective provides an overview of the performance mechanisms, preparation methods, and applications of strong magnetic flexible composite materials in soft actuators (such as gripping, movement, and sensing), and further explores current opportunities and challenges.
Wenwen Li, Shuai Liu, Xinyi Wang, Xinglong Gong, Shouhu Xuan   +4 more
wiley   +1 more source

Analysis of Wave Propagation and Energy Deposition in Low-field Peaks under Three-dimensional Non-uniform Magnetic Field

Yuanzineng kexue jishu
The helicon plasma exhibits the advantages of a high rate of ionization, high density and low confinement magnetic field. It has been widely used in plasma thruster, semiconductor etching, etc.
DU Dan1, HU Shaoxiong2, YIN Chenyan3, , HUANG Ziwen3, YU Cui2, YANG Wenjun2, ZHOU Hua4, GONG Xueyu3
doaj   +1 more source

EIGENFREQUENCIES AND EXPANSIONS FOR DAMPED WAVE EQUATIONS [PDF]

Methods and Applications of Analysis, 2003
We study eigenfrequencies and propagator expansions for damped wave equations on compact manifolds. Under the assumption of geometric control, the propagator is shown to admit an expansion in terms of finitely many eigenmodes near the real axis, with an error term exponentially decaying in time.
openaire   +4 more sources

A Review on Sensor Technologies, Control Approaches, and Emerging Challenges in Soft Robotics

Advanced Robotics Research, EarlyView.
This review provides an introspective of sensors and controllers in soft robotics. Initially describing the current sensing methods, then moving on to the control methods utilized, and finally ending with challenges and future directions in soft robotics focusing on the material innovations, sensor fusion, and embedded intelligence for sensors and ...
Ean Lovett, Maxwell Hammond, Niloufar Seyfi, Amirreza Fahim Golestaneh, Venanzio Cichella, Caterina Lamuta   +5 more
wiley   +1 more source