Results 91 to 100 of about 8,811 (267)
Advanced Materials, EarlyView.The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti +8 more
wiley +1 more source
Performance analysis and simulation of Iridium navigation satellite based on STK
, 2012 The navigation performance of Iridium satellite is simulated and analyzed based on STK from two aspectsthe number of visible satellites and geometric dilution of precision (GDOP).
Fan, Shiyue +7 more
core +1 more source
Solvent‐Free Thermal Defect Engineering in Molecular Frameworks With Volatile Linkers
Advanced Materials, EarlyView.Thermal removal of neutral volatile linkers enables precise and solvent‐free generation of metal vacancies in MOFs. This strategy affords redox‐stable, coordinatively unsaturated FeII sites with tunable spin, ligand coordination, and catalytic behavior. The approach offers a general route to design defect‐functional materials through local coordination
Sonia Martínez‐Giménez +9 more
wiley +1 more source
Geometric quality term for station-based total electron content estimation
, 2016 Global ionospheric maps (GIMs) are still commonly used to represent total electron content (TEC). However, a large number of permanent GPS receivers provide significant data for monitoring ionosphere.
Çepni, Murat Selim +3 more
core +1 more source
Advanced Materials, EarlyView.This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau +9 more
wiley +1 more source
Engineering Science and Technology, an International JournalThe aim of this paper is to enhance the accuracy and speed of receivers in integrated Global Navigation Satellite System (GNSS) systems, ensuring the ability to maintain precise and high-quality positioning even in blocking conditions.
K. Bahmani, M.R. Mosavi, A. Sadr
doaj +1 more source
A New Three-dimensional Assessment Model and Optimization for Acoustic Positioning System
, 2018 This paper addresses the problem of assessing and optimizing acoustic positioning system for underwater target localization with range measurements only. We present a new three-dimensional assessment model to assess the optimal geometric beacon formation
Lin Zhao +4 more
core +1 more source
Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection
Advanced Materials, EarlyView.Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel +7 more
wiley +1 more source
ANALISIS PERBANDINGAN NILAI DILUTION OF PRECISION (DOP) ANTARA LAYANAN SATELIT AMERIKA (GPS) DENGAN SATELIT GPS+GLONASS/RUSIA PADA PERANGKAT SMARTPHONE [PDF]
, 2014 Dari penelitian, berdasarkan pengamatan total satelit, user range error (URE) dan nilai Geometric Dilution of Precision (GDOP) dapat ditarik kesimpulan sebagai berikut: 1.
Rendra Agung Fanani
core
Geometric Analysis of LEO-Based Monitoring of GNSS Constellations [PDF]
The last decade has seen a surge in the development and deployment of low Earth orbit (LEO) constellations primarily serving broadband communication applications. These developments have also influenced the interest providing positioning, navigation, and
Brachvogel, Marius +9 more
core +1 more source