Results 81 to 90 of about 47,725 (266)

Low-Thrust Interplanetary Trajectories with Missed Thrust Events: A Numerical Approach

Journal of Guidance, Control, and Dynamics
The problem under consideration is to drive a spatial vehicle to a target at a given final time while minimizing fuel consumption. This is a classical optimal control problem in a deterministic setting. However, temporary stochastic failures of the engine may prevent the vehicle from reaching the target after engine usage is recovered.
Carpentier, Pierre, Chancelier, Jean-Philippe, Cohen, Guy, Dargent, Thierry, Epenoy, Richard   +4 more
openaire   +3 more sources

Versatile Pneumatic Twisted Coiled Actuators Enabled by Fiber‐Polymer Composite Fabrication

Advanced Functional Materials, EarlyView.
This work reports composite Pneumatic Twisted Coiled Actuators with embedded Kevlar fibers that convert pneumatic or hydraulic pressure into powerful linear motion. A novel precise manufacturing technique is used to systematically explore how design variables influence actuator mechanics and dynamics.
William J. Townsend, Jeongmin Kim, Samuel Tsai, Yichao Shi, Sameh Tawfick, James H. Pikul   +5 more
wiley   +1 more source

Monolithic Oxidation Enables Ultrathin Vertically Graded Tantalum Oxide for Low‐Voltage, Low‐Variability Memristive Switching

Advanced Functional Materials, EarlyView.
Monolithic UV‐ozone oxidation of Ta forms an ultrathin Ta2O5/TaOx bilayer enabling resistive switching with a vertical defect gradient. A stoichiometric surface layer over an oxygen‐deficient sublayer promotes localized filament nucleation near the top interface, enabling low‐voltage operation, and reduced cycle‐to‐cycle variability.
Seunghoon Yang, Dong Hyun Lee, Conan Weiland, Won‐Il Lee, Kim Kisslinger, Mingzhao Liu, Aswin kumar Anbalagan, Xiao Tong, Soumyajit Mandal, Nikhil Tiwale, Houk Jang, Chang‐Yong Nam   +11 more
wiley   +1 more source

Maximizing wireless power transfer efficiency at exceptional points

Communications Engineering
Magnetically coupled wireless power transfer (WPT) technology has been applied in stationary consumer electronics and holds great potential for charging traveling electric vehicles.
Wei-Kang Hu, Bowang Zhang, Youhao Hu, Haoxiang Li, Wei Han   +4 more
doaj   +1 more source

EXPERIMENTAL RESEARCH REGARDING FORCES AND MOMENTS WICH APPEAR AT PROCESSING X17CRNI16-2 MARTENSITIC STAINLESS STEEL [PDF]

Fiabilitate şi Durabilitate, 2015
This paper main goal is to measure axial forces (thrust) and moments at stainless steel drill process, in particular the processing of stainless steel X17CrNi16-2 SR EN 10088- 4 DIN 17440.
Leonard Marius CIUREZU GHERGHE, Nicolae DUMITRU   +1 more
doaj  

Chemically Fueled Systems Chemistry Across Length Scales

Advanced Functional Materials, EarlyView.
Chemically fueled reaction cycles regulate processes through single and multiple catalytic sites on the molecular and assembly scale. This gives rise to unique kinetically controlled properties/functions like spatio‐temporal catalysis, oscillations, optical properties, and perform work.
Brigitte A. K. Kriebisch, Job Boekhoven
wiley   +1 more source

Mechanically Mutable Matrices: A Hierarchical Investigation of Decellularized Sea Cucumber Collagen as an Adaptable Scaffold Material

Advanced Functional Materials, EarlyView.
Sea cucumber mutable collagenous tissue (MCT) is a remarkable collagen‐based material which can rapidly undergo large changes in stiffness through transiently bound effector proteins. Here, we investigate the hierarchical structure and mechanical response of MCT from Cucumaria frondosa across length scales with a wide range of methods, also exploring ...
Nathalie R. H. Singh, Amy K. Lin, Sabra Rostami, Cameron Hastie, Paul W. Wiseman, Patrick Flammang, Christopher Moraes, Matthew J. Harrington   +7 more
wiley   +1 more source

Microassembly of multi-material and 3D integration enabled by programmable and universal high-precision micro-transfer printing

International Journal of Extreme Manufacturing
Micro-transfer printing is an assembly technology that enables large-scale integration of diverse materials and components from micro- to nano-scale.
Qinhua Guo, Lizhou Yang, Yawen Gan, Jingyang Zhang, Jiajun Zhang, Jiahao Jiang, Weihan Lin, Kaiqi Chen, Chenchen Zhang, Yunda Wang   +9 more
doaj   +1 more source

Simultaneous Identification of Multiple Parameters in Wireless Power Transfer Systems Using Primary Variable Capacitors

Applied Sciences
This paper proposes a novel approach to simultaneously identifying multiple critical parameters in a wireless power transfer (WPT) system, such as the resonant frequency, mutual inductance, and load resistance, solely from the primary side. The key is to
Chang Liu, Wei Han, Youhao Hu, Bowang Zhang   +3 more
doaj   +1 more source

Tunable Complementary Doping Strategy Enables High‐Performance Homo‐Channel CMOS in Monolayer WSe2

Advanced Functional Materials, EarlyView.
Polarity‐selective modulation enables a homo‐channel WSe2 CMOS platform from a single 2D semiconductor. MoOx and AlN tune WSe2 toward p‐ and n‐type operation, respectively, yielding complementary FETs and inverters with balanced switching, high voltage gain, low static power, and promising scalability for 2D logic integration.
Kuan‐Hsiang Chiu, Wen‐Chia Wu, His‐Yu Chen, Chien‐Chih Liu, Ze‐Rui Lin, Chiung‐Yuan Lin, Chenming Hu, Chao‐Hsin Chien   +7 more
wiley   +1 more source