Results 61 to 70 of about 35,629 (311)
Advanced Science, EarlyView.A programmable 2048‐element circular ultrasound array combined with a compact acoustic lens produces a thin “sound sheet” over a large field of view, and records echoes with wide angular diversity across the ring aperture. Coherence‐enhanced beamforming converts full‐matrix data into high‐contrast tomographic slices, delivering near‐diffraction‐limited
Qiu‐De Zhang +11 more
wiley +1 more source
Variational Bayesian Based Adaptive Shifted Rayleigh Filter for Bearings-Only Tracking in Clutters
Sensors, 2019 This paper considers bearings-only target tracking in clutters with uncertain clutter probability. The traditional shifted Rayleigh filter (SRF), which assumes known clutter probability, may have degraded performance in challenging scenarios.
Jing Hou, Yan Yang, Tian Gao
doaj +1 more source
Geodesy and Cartography, 2022 The geospatial data accuracy and specification requirements for LTE and 5G radio propagation and optimization are much higher than those used in planning 2G and 3G networks.
Lidiya Prymak, Yurii Karpinsky
doaj +1 more source
Advances in Applied Mathematics, 1997 A family of circuits is associated with an arbitrary clutter. Several characterizations of matroid parts using their circuits are presented.
openaire +1 more source
Advanced Science, EarlyView.We investigate whether Montessori and traditional schooling systems shape the developmental trajectory of large‐scale brain dynamics in different ways. We quantify the arrow of time (“non‐reversibility”) in neural activity during resting state and movie‐watching, revealing distinct maturational patterns.
Elvira del Agua +6 more
wiley +1 more source
Detection of very close targets by fusion CFAR detectors [PDF]
Scientific Technical Review, 2016 In this paper the new application results of Linear and NonLinear Fusion Constant False Alarm Rate (LF-CFAR and NLF- CFAR) detectors are presented. Detection of very close targets per azimuth and per range is considered.
Ivković Dejan +2 more
doaj
Radar Constant-Modulus Waveform Design with Prior Information of the Extended Target and Clutter
Sensors, 2016 Radar waveform design is of great importance for radar system performances and has drawn considerable attention recently. Constant modulus is an important waveform design consideration, both from the point of view of hardware realization and to allow for
Wenzhen Yue +3 more
doaj +1 more source
Advanced Science, EarlyView.A multifunctional benzimidazole‐terminated CNF separator is constructed via a PEI‐mediated covalent locking strategy, generating dense zincophilic sites that accelerate Zn2+ transport and desolvation while enabling uniform Zn (002) deposition and suppressing side reactions.
Jie Liang +17 more
wiley +1 more source
A New Approach to OTH Main Parameters Determination [PDF]
Radioengineering, 2019 In this work, we propose a method based on a simulation that incorporates several models to provide the set of parameters needed on Over-The-Horizon radars (OTHR) performance evaluation, which consists in a versatile software tool.
Z. Saavedra +3 more
doaj
On the Use of Low-Cost Radar Networks for Collision Warning Systems Aboard Dumpers
Sensors, 2014 The use of dumpers is one of the main causes of accidents in construction sites, many of them with fatal consequences. These kinds of work machines have many blind angles that complicate the driving task due to their large size and volume.
José-Tomás González-Partida +3 more
doaj +1 more source