Results 71 to 80 of about 8,951,924 (301)

Auxiliary beam terrain-scattered interference suppression: reflection system and radar performance [PDF]

, 2013
Terrain-scattered interference (TSI), that is, jammer signals reflected on the earth's surface, is a significant problem to military airborne radar.
Pettersson, Mats, Björklund, Svante, Björklund, Svante,, Nelander, Anders, Pettersson, Mats,   +4 more
core   +1 more source

Origin of Dark Current Robustness in Photomultiplication Organic Photodetectors Enabled by Ionic Conjugated Electron‐Blocking Layers

Advanced Materials, EarlyView.
Ionic conjugated polyelectrolyte electron‐blocking layers enable photomultiplication organic photodetectors with dark current robustness up to −10 V and external quantum efficiencies exceeding 3000%. Fowler–Nordheim tunneling, interfacial dipole, trap density of states, and noise analyses reveal how ionic conjugated polyelectrolytes suppress electron ...
Yelim Kang, Min Hun Jee, Shuai Zhang, Sang Heon Lee, Jung Min Ha, Xingchao Zhao, Xiaoling Ma, Huiseong Shin, Changhwan Shin, Soonyong Lee, Fujun Zhang, Jae Won Shim, Han Young Woo   +12 more
wiley   +1 more source

A Network of Portable, Low-Cost, X-Band Radars [PDF]

, 2012
Radar is a unique tool to get an overview on the weather situation, given its high spatio- temporal resolution. Over 60 years, researchers have been investigating ways for obtaining the best use of radar.
Allegretti, Marco, Andrea Prato, Marco Allegretti, Giovanni Pero, Prato, Andrea, Lucianaz, Claudio, Perona, Giovanni Emilio, Riccardo Notarpietro, Claudio Lucianaz, Marco Gabella, Notarpietro, Riccardo, Silvano Bertoldo, Oscar Rorato, Giovanni Perona, Gabella, Marco, Bertoldo, Silvano, Rorato, Oscar   +16 more
core   +1 more source

Sustainable and Multifunctional Natural Macromolecular Polymers for Aqueous Zn Metal Batteries

Advanced Materials, EarlyView.
We comprehensively review the structure‐function relationships and regulatory mechanism of natural macromolecular polymers in stabilizing zinc anodes at the microscopic and mesoscopic scales. The interactions among polymer structures, optimization strategies, and regulatory mechanisms are discussed systematically summarizing recent related research ...
Yunuo Shi, Bo Jiang, Jingcheng Zhang, Xiaodong Shao, Peixun Xiong, Lutong Shan, Shengyang Huang, Mengfang Liang, Mengyao Chang, Fangyan Liu, Wenwu Li, Baoyu Xia, Wei Ji, Ho Seok Park   +13 more
wiley   +1 more source

Evaluating the detection range of microwave quantum illumination radar

IET Radar, Sonar & Navigation, 2023
Based on quantum illumination (QI) protocol, microwave quantum radar has been developed, which has attracted great interest from radar researchers.
Rongyu Wei, Jun Li, Weihao Wang, Zhou Ye, Chunlei Zhao, Qinghua Guo   +5 more
doaj   +1 more source

Electrolyte Design for Fast‐Charging Lithium‐Based Batteries

Advanced Materials, EarlyView.
A decade of progress in fast‐charging electrolytes for lithium batteries is reviewed. Electrolyte design strategies spanning solvents, salts, additives, and advanced systems, such as localized high‐concentration electrolytes (LHCEs), are summarized. Advanced diagnostic tools for lithium plating and interphase chemistry are discussed, with perspectives ...
Chen Liu, Zehao Cui, Arumugam Manthiram
wiley   +1 more source

Confinement‐Induced Donnan Potential Enables Sealed Hydrovoltaic Power From Microliter Water

Advanced Materials, EarlyView.
An ultrathin MXene/cellulose nanofiber (CNF) nanochannel‐based hydrovoltaic generator produces sustained direct current (DC) from a single microliter droplet under sealed operation. Asymmetric nanochannel confinement establishes a persistent ion gradient and a confinement‐induced Donnan potential, harvesting the interfacial free energy released upon ...
Sangyun Na, Geonyoung Jung, Yoojin Chang, Yun Goo Ro, Cheolhong Park, Jeonghee Yeom, Jinyoung Kim, Jeeyoon Kim, Hyejin Lee, Hyeji Oh, Hyunhyub Ko   +10 more
wiley   +1 more source

Resource allocation of distributed MIMO radar based on the hybrid action space reinforcement learning

Scientific Reports
The distributed multiple-input multiple-output (MIMO) radar system exhibits superior target localization capability by jointly processing target information from multiple radars under different observation angles.
Jin Zhu, Wenxu Liu, Feifei Lyu, Siwei Li, Tianyang Zhang   +4 more
doaj   +1 more source

DDMA MIMO radar system for low, slow, and small target detection

The Journal of Engineering, 2019
The low, slow, and small (LSS) target detection has always been a problem for both ground-based and air-borne radar systems. The factors such as weak target reflection energy, ground clutter, and random Doppler component will have a severe impact on ...
Fawei Yang, Feng Xu, Xiaopeng Yang, Quanhua Liu   +3 more
doaj   +1 more source

Design of a wideband and tunable radar absorber

Materials Research Express, 2023
To effectively address the challenges posed by intricate and dynamic electromagnetic environments, we propose a wideband and tunable radar absorber in this paper.
Xin Gao, Zheng Dou, Ruihui Peng, Xiangwei Wang, Yongsheng Lv   +4 more
doaj   +1 more source