Results 41 to 50 of about 391,221 (333)

Cognitive Radio for Emergency Networks [PDF]

, 2006
In the scope of the Adaptive Ad-hoc Freeband (AAF) project, an emergency network built on top of Cognitive Radio is proposed to alleviate the spectrum shortage problem which is the major limitation for emergency networks.
Kokkeler, A.B.J., Smit, G.J.M., Zhang, Qiwei   +2 more
core   +2 more sources

Integrative Approaches for DNA Sequence‐Controlled Functional Materials

Advanced Functional Materials, EarlyView.
DNA is emerging as a programmable building block for functional materials with applications in biomimicry, biochemical, and mechanical information processing. The integration of simulations, experiments, and machine learning is explored as a means to bridge DNA sequences with macroscopic material properties, highlighting current advances and providing ...
Aaron Gadzekpo, Ewa Anna Oprzeska‐Zingrebe, Mariana Kozlowska, Lennart Hilbert, Iliya D. Stoev   +4 more
wiley   +1 more source

Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot Contamination

IEEE Access, 2016
This paper concerns with a relay-aided massive multiple input multiple output (MIMO) cellular network. The exact closed-form expressions of both spectral efficiency (SE) and energy efficiency (EE) are obtained for downlink single-cell multi-user multi ...
Jing Chen, Hongbin Chen, Han Zhang, Feng Zhao   +3 more
doaj   +1 more source

Fuzzy logic, genetic algorithms, and artificial neural networks applied to cognitive radio networks: A review

International Journal of Distributed Sensor Networks, 2022
Cognitive radios are expected to play an important role in capturing the constantly growing traffic interest on remote networks. To improve the usage of the radio range, a cognitive radio hub detects the weather, evaluates the open-air qualities, and ...
Ahmed Alkhayyat, Firas Abedi, Ashish Bagwari, Pooja Joshi, Haider Mahmood Jawad, Sarmad Nozad Mahmood, Yousif K Yousif   +6 more
doaj   +1 more source

Targeting the ARRDC3–DRP1 Axis via hUMSC‐Derived Exosomal CRYAB for Neuroprotection in Cerebral Ischemia/Reperfusion Injury

Advanced Healthcare Materials, EarlyView.
Intranasally administered hUMSC‐derived exosomes modulate the CRYAB–ARRDC3–Drp1 axis, alleviating mitochondrial dysfunction and ferroptosis, enhancing neuronal survival, reducing oxidative stress, and promoting functional recovery in ischemia‐reperfusion injury, offering a promising therapeutic strategy for ischemic stroke.
Rong ji, Zengyu Zhang, Zhuohang Liu, Kaicheng Yang, Xueyu Mao, Min Chu, Yong Wang, Jing Zhao   +7 more
wiley   +1 more source

Multi-dimensional resource allocation strategy for LEO satellite communication uplinks based on deep reinforcement learning

Journal of Cloud Computing: Advances, Systems and Applications
In the LEO satellite communication system, the resource utilization rate is very low due to the constrained resources on satellites and the non-uniform distribution of traffics.
Yu Hu, Feipeng Qiu, Fei Zheng, Jilong Zhao   +3 more
doaj   +1 more source

Silent speech command word recognition using stepped frequency continuous wave radar

Scientific Reports, 2022
Recovering speech in the absence of the acoustic speech signal itself, i.e., silent speech, holds great potential for restoring or enhancing oral communication in those who lost it.
Christoph Wagner, Petr Schaffer, Pouriya Amini Digehsara, Michael Bärhold, Dirk Plettemeier, Peter Birkholz   +5 more
doaj   +1 more source

Sliding Window Spectrum Sensing for Full-Duplex Cognitive Radios with Low Access-Latency

, 2016
In a cognitive radio system the failure of secondary user (SU) transceivers to promptly vacate the channel can introduce significant access-latency for primary or high-priority users (PU).
Afisiadis, Orion, Austin, Andrew C. M., Balatsoukas-Stimming, Alexios, Burg, Andreas   +3 more
core   +1 more source

Throughput analysis for cognitive radio networks with multiple primary users and imperfect spectrum sensing [PDF]

, 2012
In cognitive radio networks, the licensed frequency bands of the primary users (PUs) are available to the secondary user (SU) provided that they do not cause significant interference to the PUs.
Alouini, M.-S., Imran, M.A., Shakir, M.Z., Tafazolli, R., Tang, W.   +4 more
core   +1 more source

Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application

Advanced Materials, EarlyView.
This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong, You Zhou, Qingxiu Li, Wenyu Zhao, Sunyingyue Geng, Hangfei Li, Yan‐Bing Leng, Shirui Zhu, Guanglong Ding, Yongbiao Zhai, Ziyu Lv, Ye Zhou, Su‐Ting Han   +12 more
wiley   +1 more source