Results 201 to 210 of about 19,229 (302)

Millimeter-Wave Antennas for 5G Wireless Communications: Technologies, Challenges, and Future Trends. [PDF]

Sensors (Basel)
Yang Y, Mao M, Xu J, Liu H, Wang J, Song K.   +5 more
europepmc   +1 more source

Study on the failure mechanism of the shield excavation face in the sandy cobble stratum under different buried depths

Deep Underground Science and Engineering, EarlyView.
Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang, Chongyang Liu, Ao Zhang, Xiaoyan Zhang, Yuhang Li   +4 more
wiley   +1 more source

Design of an Ultra-Wideband MIMO Antenna with Open-Slot Structures for 5G Metal-Frame Smartphones. [PDF]

Sensors (Basel)
Chen L, Bai J, Gu H.
europepmc   +1 more source

High‐Adhesion Quadruple Hydrogen‐Bonded Ionogels: A Dual‐Function Platform for Gesture Recognition and Real‐Time NH3 Detection in Multiscenario

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Quadruple hydrogen‐bonded high‐adhesion ionogels for gesture recognition and real‐time NH3 sensing. Ionogels have garnered significant attention in flexible sensing due to their outstanding mechanical properties, conductivity, and stability. However, establishing a robust and stable adhesive interface with various substrates remains a significant ...
Haohao Lin, Xiaotong Ma, Zihao Chen, Long Yang, Zitong Kan, Ruochen An, Lin Xu, Zhiyong Chang   +7 more
wiley   +1 more source

Hybrid-decoupling-based shared-aperture phased array antenna for Ku/Ka-band with low profile, wide-angle scanning and high isolation. [PDF]

Sci Rep
Xie W, Li C, Zhu Y, Xu Y, Xiong B.
europepmc   +1 more source

Bottlenecks‐Breaking in Zinc‐Iodine Batteries Toward Practical Implementation: A Review and Perspective

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Aqueous zinc–iodine batteries (Zn–I2Bs) offer promise for grid storage due to safety and cost advantages yet face critical bottlenecks: severe self‐discharge (polyiodide shuttling and HER), limited energy density, sluggish kinetics, and zinc anode instability.
Jia‐Lin Yang, Jun‐Ming Cao, Dai‐Huo Liu, Xing‐Long Wu   +3 more
wiley   +1 more source

An In-Depth Statistical Analysis of the TARC Parameter to Evaluate the Real Impact of Random Phases in MIMO Antennas. [PDF]

Sensors (Basel)
Perez-Miguel A, Jardon-Aguilar H, Tirado-Mendez JA, Gomez-Villanueva R, Flores-Leal R, Fritz-Andrade E.   +5 more
europepmc   +1 more source

Dinuclear Rhodium(I)–N‐Heterocyclic Carbene Complexes as Alkyne Hydropyridonation Catalysts

European Journal of Inorganic Chemistry, EarlyView.
Catalyst Improvement by NHC tuning: A series of new RhI–NHC dinuclear complexes has been revealed as efficient alkyne hydropyridonation catalysts. 333053IMes complex displays the highest reactivity of the series, suggesting that a moderate steric demand combined with balanced σ‐donation facilitates precatalyst activation and substrate exchange.
Belinda Español‐Sánchez, Mert Olgun Karataş, Andrea Di Giuseppe, Ulugbek Togaev, Vincenzo Passarelli, Luis A. Oro, Jesús J. Pérez‐Torrente, Ricardo Castarlenas   +7 more
wiley   +1 more source

Design and analysis of a 60 GHz high gain wideband magneto electric dipole antenna array based on trapped printed gap waveguide technology. [PDF]

Sci Rep
Hamada H, Ali MMM, Shams SI, Khalaf AAM, Allam AMMA.   +4 more
europepmc   +1 more source

Analysis of a Novel Brushless Doubly Fed Reluctance Generator Based Wind Energy Conversion System

Energy Science &Engineering, EarlyView.
BDFRG based grid connected wind energy conversion system. ABSTRACT This paper presents a grid connected Brushless Doubly‐Fed Reluctance Generator (BDFRG) based wind energy conversion system. It offers a reliable and cost‐effective solution since its brushless and cage‐less rotor structure eliminates the need for slip rings, reducing maintenance costs ...
Subir Datta, John Lalsanglien, Subhasish Deb, Robert Singh, C. Rohmingtlunga, Md. Minarul Islam, Taha Selim Ustun   +6 more
wiley   +1 more source