Results 91 to 100 of about 376,469 (312)

Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities

Advanced Materials, EarlyView.
This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen, Zhanxi Fan, Jingjie Ge, Qiyuan He, Zhuangchai Lai, Jiawei Liu, Chaoliang Tan, Hua Zhang   +7 more
wiley   +1 more source

Constraint models for multiple interference in the channel assignment problem [PDF]

, 2005
For the channel assignment problem, the adequacy of binary channel separation constraints based on the single interferer assumption and/or a constant re-use distance has been questioned by several authors.
Weston, Claire L
core  

A Comparison of Existing Optimisation Techniques with the Univariate Marginal Distribution Algorithm for the Channel Assignment Problem [PDF]

, 2016
The channel assignment problem has an important role to play in mobile telephone communication. Since the frequency band width is limited, the optimal assignment problem of channels has become increasingly  important.
Cheeneebash, J, Rughooputh, HCS
core   +2 more sources

A Resource Allocation Algorithm Based on Subcarrier Pairing in Multi-User Cooperative Relay Communication

Dianxin kexue, 2014
For the power minimization problem in multi-user cooperative relay communications,a resource allocation algorithm based on joint subcarrier pairing and assignment was proposed.Firstly,according to the average channel gain and the target rates of user,the
Bin Chen, Youming Li, Tao Guo, Peng Lei, Xiaoqing Liu   +4 more
doaj   +2 more sources

Optimized Hybrid Resource Allocation in Wireless Cellular Networks with and without Channel Reassignment

Journal of Computer Systems, Networks, and Communications, 2010
In cellular networks, it is important to determine an optimal channel assignment scheme so that the available channels, which are considered as “limited” resources in cellular networks, are used as efficiently as possible.
Xin Wu, Arunita Jaekel, Ataul Bari, Alioune Ngom   +3 more
doaj   +1 more source

Resource Allocation Optimization in Multi-User Multi-Cell Massive MIMO Networks Considering Pilot Contamination

IEEE Access, 2015
In this paper, we study the joint pilot assignment and resource allocation for system energy efficiency (SEE) maximization in the multi-user and multi-cell massive multi-input multi-output network.
Tri Minh Nguyen, Vu Nguyen Ha, Long Bao Le   +2 more
doaj   +1 more source

Space‐Time Coding Conformal Metasurfaces for Multifrequency Beam Steering and Shaping

Advanced Materials, EarlyView.
Space‐time coding conformal metasurfaces enable dynamic wave control on curved surfaces by combining programmable spatial patterns with temporal modulation. This study shows that a single conformal aperture can independently manipulate multiple frequency components, achieving multifunctional beam shaping and steering, with implications for ...
Filippo Pepe, Lei Zhang, Yi Ning Zheng, Xiao Qing Chen, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Tie Jun Cui, Vincenzo Galdi   +8 more
wiley   +1 more source

A heuristic algorithm for channel assignment in cellular mobile systems [PDF]

, 1998
This paper describes an efficient heuristic algorithm for the channel assignment problem (CAP) in cellular mobile systems. The channel assignment scheme proposed here is based on repetitive ordering of requirements in sequences.
Thavarajah, AI, Thavarajah, A, Lam, WH
core   +1 more source

Optimal channel assignment on dense Wi-Fi networks using Thermodynamic Threshold Accepting

Engineering Science and Technology, an International Journal
Channel assignment in Wi-Fi 6 dense networks is a challenging problem which critically impacts the performance of WLAN communications. Although there have been many proposals in the area of IEEE 802.11 channel assignment, LCCS has emerged as the de facto
Marino Tejedor-Romero, Jose Manuel Gimenez-Guzman, Luis Cruz-Piris, David Herranz-Oliveros, Iván Marsa-Maestre   +4 more
doaj   +1 more source

Stabilized Bi(III) Sites Direct *NH2OH Pathway for Efficient Cyclohexanone Oxime Electrosynthesis

Advanced Materials, EarlyView.
The electron‐buffering effect stabilizes Bi3+ sites under electroreductive conditions, preserving a favorable interfacial water configuration that sustains the selective *NH2OH pathway and enables efficient cyclohexanone oxime electrosynthesis. ABSTRACT Coupling electrocatalytic nitrite reduction reaction (NO2−RR) with cyclohexanone conversion enables ...
Zichao Xi, Yan Du, Haijing Li, Jian Shang, Jinxiao Wu, Peng Li, Huimin Yu, Tianyi Ma, Huanyu Jin   +8 more
wiley   +1 more source