Results 71 to 80 of about 39,985,526 (257)

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Research on broadband dither technique in signal acquisition

open access: yesThe Journal of Engineering, 2019
AD converter is one of the core components in the signal acquisition system. The quality of the signal acquisition system is mainly determined by its internal analogue-to-digital converter (ADC) characteristics.
Tong Yin, Xiaolong Chen
doaj   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

open access: yesAdvanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi   +3 more
wiley   +1 more source

Biopotential acquisition unit for energy-efficient wearable health monitoring

open access: yesIET Cyber-Physical Systems, 2018
In wearable health monitoring system, the energy consumption is dominated by the transmitter. These systems generally use proprietary acquisition platforms that are incompatible with each other which makes this even more challenging.
Wazir Singh, Sujay Deb
doaj   +1 more source

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev   +2 more
wiley   +1 more source

Research on design and key technology of wideband radar intermediate frequency direct acquisition module based on Virtex-7 series FPGA

open access: yesThe Journal of Engineering, 2019
The wideband radar intermediate frequency direct acquisition module is used to acquire, process and transmit data, which is an important part of radar system. Based on the current advanced Virtex-7 FPGA board and high-speed ADC card, this article designs
Jian Zhang   +3 more
doaj   +1 more source

Determining temporal differences with analogue and digital time displays

open access: yes, 1972
In daily life one often has to subtract the time shown by an analogue display, e.g, a conventional watch, from a time presented digitally, e.g. in a time-table.
van Nes, F.L.
core   +1 more source

Investigating the Effect of Inclination Angle and the Influence of Scan Parameters on the Appearance and Thermal and Mechanical Properties of Filigree Tension Rods of LPBF‐Manufactured NiTi Shape‐Memory Alloys

open access: yesAdvanced Engineering Materials, EarlyView.
This article investigates the dependence of the properties on the manufacturing orientation in the form of the inclination angle to the build plate of LPBF‐fabricated NiTi rods with a diameter of 150–220 µm. Metallographic, chemical, thermal, and mechanical characterization show behavior under identical manufacturing conditions that ranges from ...
Sandra Herzig   +2 more
wiley   +1 more source

An improved kT/C noise cancellation technique with presampling for high‐speed SAR ADCs

open access: yesElectronics Letters
The kT/C noise cancellation technique can effectively reduce the digital‐to‐analog converter (DAC) size for successive approximation register ADCs and thus relax the burden for input drivers and reference buffers.
Yuanfan Gu   +5 more
doaj   +1 more source

Transforming characteristics of the Rogowski coil current transformer with a digital integrator for high-frequency signals

open access: yesThe Journal of Engineering, 2019
The Rogowski coil current transformer is widely used in intelligent substations for its rapid response, wide bandwidth measurement, and non-magnetic saturation.
Fubin Pang   +3 more
doaj   +1 more source

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