Results 101 to 110 of about 3,882,562 (249)

An impedance approach to reduce the contact-instability whilst drilling with active heave compensation [PDF]

, 2012
The bit-bounce, or contact-instability, phenomenon which occurs in the drill string suspended from a floating vessel with an active drill string compensator to maintain a steady weight on the drill bit is investigated.
Hatleskog, Jan, Dunnigan, Mathew Walter
core   +1 more source

Programmable Pneumatic Actuator System for a Bioinspired Artificial Colon

Advanced Materials Technologies, EarlyView.
A modular soft robotic colon simulator driven by programmable pneumatic actuation is developed to mimic physiological and pathological‐like motility patterns of the large intestine. Finite element–guided design and distributed control enable anatomically realistic deformation for peristalsis, segmentation, and mass movements, supporting capsule ...
Andrew Bickerdike, Bo Tian, Xizheng Fang, Zepeng Wang, Yang Liu, Lucy Adams, Shyam Prasad   +6 more
wiley   +1 more source

High Throughput Aerosol Jet Printing to Operationalize High Aspect Ratio Patterning

Advanced Materials Technologies, EarlyView.
High‐throughput aerosol jet printing poses distinct limiting mechanisms to the printing process. These include rapidly changing ink chemistries, atomization instabilities, and liquid‐phase spreading. The combination of in‐line heating, process monitoring, and traditional optimization procedures enables rapid printing of high‐aspect‐ratio structures ...
Bella I. Guyll, Md Mahdi Ul Ishtiaque, Md Ramjan Ali, Todd A. Kingston, Ethan B. Secor   +4 more
wiley   +1 more source

Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication

Advanced Materials Technologies, EarlyView.
The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting, Yuh‐Chyi Chang, Yi‐Chan Hung, Cheng‐Yuan Hsiao, Chao‐Kai Wen, Tsung‐Hsien Lin   +5 more
wiley   +1 more source

Adaptive Virtual Complex Impedance‐Based Power Sharing Control Scheme for Islanded Microgrids

IET Smart Grid
To overcome the inaccurate power sharing and circulating current issues caused by the mismatched feeder impedance, this paper proposed an adaptive virtual complex impedance‐based power sharing control scheme, where both virtual inductance and virtual ...
Junjie Ma, Hui Wang
doaj   +1 more source

Self-Measurement of Three-Phase Converter Impedance With Virtual Excitation Source

IEEE Open Journal of Power Electronics
With the massive deployment of converter-based power generation, low-frequency oscillations (LFOs) such as sub-synchronous oscillations (SSOs) caused by converter-grid interactions have garnered widespread attention.
Han Mu, Zheran Zeng, Dongsheng Yang, Yin Sun, Xiongfei Wang   +4 more
doaj   +1 more source

Toward Perception‐Native Electronic Skin: Bio‐Inspired In‐/Near‐Sensor and Neuromorphic Computing for Humanoid Robots

Advanced Materials Technologies, EarlyView.
Dense tactile streams from across the humanoid body converge on collide in a central wiring and data bottleneck. By relocating computation closer to and then into the skin itself, near‐ and in‐sensor architectures, together with neuromorphic computing, chart a path toward perception‐native electronic skin, in which the conversion of stimulus into ...
Mijin Kim, Chang‐Jae Beak, Jiyoung Park, Youngdo Jung, Sunjong Oh, Sin‐Hyung Lee, Bo‐Yeon Lee   +6 more
wiley   +1 more source

Enhanced Low‐Voltage Ride‐Through Capability of DFIG by Explicit Model Predict Control Based Decoupled Virtual Impedance

IET Renewable Power Generation
The power grid requires doubly‐fed induction generators (DFIGs) to effectively suppress rotor currents and provide reactive power support during low voltage ride‐through (LVRT) events.
Jia Luo, Haoran Zhao, Peng Wang
doaj   +1 more source

The limits of Brune's impedance [PDF]

, 2012
"The impedance concept as popularized by Oliver Heaviside in the 1880s may be used to model physical systems that may or may not include wave propagation.
Serwy, Roger David
core  

Liquid Crystal Elastomer Actuator Matrix for Large Area Applications

Advanced Materials Technologies, EarlyView.
A scalable approach is used to manufacture a digitally‐controllable, 2D 5 × 5 actuator matrix. The elements of the matrix are produced by direct ink writing of a liquid crystal elastomer ‘artificial muscle’ on large‐area flexible thin‐film heaters. In optimizing the low‐power actuators, multiple heater designs and substrate materials are investigated ...
Giulia Spallanzani, Bart Peeters, Danqing Liu, Peter Zalar, Hylke B. Akkerman, Jeroen A. H. P. Sol   +5 more
wiley   +1 more source