Results 21 to 30 of about 81,888 (264)

A new characterization of the dual polar graphs [PDF]

open access: yesJournal of Combinatorial Theory, Series B, 2019
In this paper we give a new characterization of the dual polar graphs, extending the work of Brouwer and Wilbrink on regular near polygons. Also as a consequence of our characterization we confirm a conjecture of the authors on non-bipartite distance-regular graphs with smallest eigenvalue at most $-k/2$, where $k$ is the valency of the distance ...
Zhi Qiao 0003, Jacobus H. Koolen
openaire   +3 more sources

Hybrid Beamforming for dual-polarized antenna [PDF]

open access: yes2019 IEEE Wireless Communications and Networking Conference (WCNC), 2019
Recently, dual-polarized antenna has attracted strong attention in Millimeter wave (mmWave) systems. It provides an additional degree-of-freedom in wireless communication, yielding higher throughput. Nowadays, with the development of antenna technology, dual-polarized large scale antenna arrays can be realized inexpensively. However, several challenges
Dien-Hoa Truong   +2 more
openaire   +2 more sources

A Microstrip Antenna Achieves Dual Polarization Conversion by Rotating Metasurface

open access: yesIEEE Access
To expand the channel capacity of a traditional single-polarization reconfigurable antenna, a design method for a dual-polarization reconfigurable microstrip antenna loaded with a passive metasurface was proposed.
Bo Wu   +6 more
doaj   +1 more source

Polarization Characteristics Simulation of Airborne Weather Radar Rainfall Target Based on Numerical Weather Prediction

open access: yesLeida xuebao, 2016
Meteorological target simulation using polarization information is the foundation of the theoretical research and design application of dual-polarization Doppler weather radar.
Liu Xia   +4 more
doaj   +1 more source

Enhanced Angle-of-Arrival and Polarization Parameter Estimation Using Localized Hybrid Dual-Polarized Arrays

open access: yesSensors, 2022
The millimeter wave (mmWave) channel is dominated by line-of-sight propagation. Therefore, the acquisition of angle-of-arrival (AoA) and polarization state of the wave is of great significance to the receiver.
Xiaolu Yu   +4 more
doaj   +1 more source

Adaptive Dual-Polarization Filtering Method for Countering Active Jamming

open access: yesInternational Journal of Antennas and Propagation, 2020
In order to counter active jamming, an adaptive polarization filtering method based on dual polarization radar is put forward. First, the signal flow principle of the dual polarization radar and its signal model are introduced.
Qiang Zhang   +3 more
doaj   +1 more source

Exceptional Extended Dual Polar Spaces

open access: yesEuropean Journal of Combinatorics, 1997
It is considered an extended dual polar space (EDPS). An EDPS \({\mathcal G}\) is called affine if there is a flag-transitive automorphism group \(G\) and a normal subgroup \(T\) in \(G\) such that \(T\) acts regularly on the set of elements of type 1 in \({\mathcal G}\). Theorem. Let \({\mathcal G}\) be an EDPS whose rank is greater than or equal to 3
openaire   +1 more source

Septin 9 PB domains coordinate centrosome positioning and microtubule acetylation to control epithelial polarity

open access: yesFEBS Letters, EarlyView.
Septin 9 polybasic domains couple phosphoinositide‐rich membrane binding to centrosome positioning, Golgi organization, and microtubule acetylation to control epithelial polarity. Their loss disrupts this axis, causing centrosome mispositioning, Golgi fragmentation, reduced microtubule acetylation, and polarity inversion via upregulation of the ...
Ting ting Cai   +4 more
wiley   +1 more source

A Characterization of Half-Dual Polar Graphs

open access: yesEuropean Journal of Combinatorics, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Hippo pathway at the crossroads of stemness and therapeutic resistance in breast cancer

open access: yesMolecular Oncology, EarlyView.
Dysregulation of the Hippo pathway drives nuclear accumulation of YAP/TAZ, activating stemness‐related transcriptional programs that sustain breast cancer stemness and fuel therapeutic resistance across subtypes, underscoring Hippo signaling as a targetable vulnerability. Figure created and edited with BioRender.com.
Giulia Schiavoni   +11 more
wiley   +1 more source

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