Results 151 to 160 of about 78,150 (324)

A Generalized Approach to the Calculation Procedure of Distribution Network Steady-state and Transient Regime [PDF]

Problems of the Regional Energetics, 2015
The low-voltage electrical distribution networks are characterized by ramified topology and spatial distribution of the consumers connected to the power supply. This leads to certain difficulties in calculation of such circuits even in the case of steady
Berzan V., Postoronca Sv., Vieru D., Tintiuc Iu.   +3 more
doaj  

Asimov's Coming Back [PDF]

, 2006
Ever since the word ‘ROBOT’ first appeared in a science\ud fiction in 1921, scientists and engineers have been trying\ud different ways to create it. Present technologies in\ud mechanical and electrical engineering makes it possible\ud to have robots in ...
Wang, Mr. L.
core  

Roadmap to Precision 3D Printing of Cellulose: Rheology‐Guided Formulation, Fidelity Assessment, and Application Horizons

Advanced Materials Technologies, EarlyView.
This critical review presents a comprehensive roadmap for the precision 3D printing of cellulose. Quantitative correlations link ink formulation and rheological properties to print fidelity and final material performance. This framework guides the development of advanced functional materials, from biomedical scaffolds to electromagnetic shielding ...
Majed Amini, Hadi Hosseini, Seyyed Alireza Hashemi, Mohammad Arjmand   +3 more
wiley   +1 more source

Author Correction: Realization of quasicrystalline quadrupole topological insulators in electrical circuits [PDF]

Communications Physics, 2021
Bo Lv, Rui Chen, Rujiang Li, Chunying Guan, Bin Zhou, Guohua Dong, Chao Zhao, YiCheng Li, Ying Wang, Huibin Tao, Jinhui Shi, Dong-Hui Xu   +11 more
openaire   +2 more sources

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface

Advanced Materials Technologies, EarlyView.
An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim, Donggeun An, Hyunjae Shin, Youngno Youn, Wonbin Hong   +4 more
wiley   +1 more source

Design and Fabrication of High Dielectric GRIN Lens for a Directive Antenna Using a Hybrid Filled Voxel Additive Manufacturing Technique

Advanced Materials Technologies, EarlyView.
Hybrid‐filled voxel AM enables integration of high‐permittivity materials into additively manufactured devices. Using this approach, a graded refractive index (GRIN) lens is demonstrated, achieving a 50% antenna size reduction with enhanced directivity.
Qianfang Zheng, Anna Radkovskaya, Kailun Xu, Ekaterina Shamonina, Patrick S. Grant   +4 more
wiley   +1 more source

Bidirectional Hybrid DC Circuit Breaker With Zero Voltage and Current Switching for Radar Power System

IEEE Open Journal of Industry Applications
This article proposes a novel zero-voltage switching (ZVS) and zero-current switching (ZCS)-based hybrid dc circuit breaker for a radar power system. Long-range radars demand huge power, in the order of hundreds of kW. Radar's phased array antenna
Nandakumar Saminathan, Aditya P, Satish Naik Banavath, Alessandro Lidozzi, Marco Di Benedetto, Vengadarajan A   +5 more
doaj   +1 more source

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

Advanced Optical Materials, EarlyView.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova, Katsiaryna Pantsialeyeva, Dmitry Gorbach, Alexei Tolstik, Sergei Slussarenko Jr., Alina Karabchevsky   +5 more
wiley   +1 more source

Thermoelectric Generator Circuit With Tree Topology and Evolutionary Reconfiguration

IEEE Access
This paper presents an original technique for the dynamic reconfiguration of a thermoelectric generators (TEGs) electric mesh. The novelty of the method is the use of a unique binary tree topology of the switching circuit, as well as the designed ...
Tomasz Golonek, Jan Machniewski
doaj   +1 more source

Evolutionary Synthesis of Fractional Capacitor Using Simulated Annealing Method [PDF]

, 2012
Synthesis of fractional capacitor using classical analog circuit synthesis method was described in [6]. The work presented in this paper is focused on synthesis of the same problem by means of evolutionary method simulated annealing.
Drinovsky, J., Gotthans, T., Slezak, J.
core   +1 more source