Results 91 to 100 of about 93,158 (208)

Unequal Land and Water Changes Between Nations Driven by International Boundary Rivers: Mapping and Temporal Analysis of Shared Borders Between China and Its Neighbors

Earth's Future, Volume 14, Issue 4, April 2026.
Abstract International Boundary Rivers (IBRs), as natural political frontiers, constitute one‐third of China's land borders. However, a lack of systematic monitoring has led to a limited understanding of the distribution of these politically significant rivers and the potential risks posed by their dynamic nature.
Shengquan Lu, Bin Wu, Wenzhu Zhang, Xiangying Kong, Guanhai Gu, Kai Jiang   +5 more
wiley   +1 more source

3D As‐Built Environments in Extended Reality Applications: A Systematic Review

The Photogrammetric Record, Volume 41, Issue 194, April/June 2026.
This systematic review identifies BIM and game engines as the primary tools for integrating 3D as‐built environments into XR. While multi‐sensor fusion and multimodal interaction enhance immersion, persistent challenges like manual modeling and bandwidth limitations continue to hinder full ecosystem maturation.
Jesús Balado, Yu Feng, Zhouyan Qiu, Weixiao Gao, Arttu Julin   +4 more
wiley   +1 more source

Towards Autonomous Uwb-Based Uav Indoor Navigation

Acta Electrotechnica et Informatica
This paper presents a system for autonomous indoor navigation of the DJI Mini 3 drone by combining an Android-based control application with ultra-wideband (UWB) technology for precise localization.
Krupáš Maroš, Pačuta Kristián, Zolotová Iveta   +2 more
doaj   +1 more source

Compact Ultra Wide-Band and Tri-Band Antenna for Portable Device [PDF]

Radioengineering, 2020
A compact ultra-wideband (UWB) and triband patch antenna with the partial ground plane is presented in this paper. Initially, the antenna is designed for UWB applications, operating at the UWB portion of the spectrum ranging from 3.1 GHz to 10.6 GHz ...
A. Ghaffar, W. A. Awan, A. Zaidi, N. Hussain, S. M. Rizvi, X. J. Li   +5 more
doaj  

Homogeneous Observer‐Based Affine Formation Tracking

International Journal of Robust and Nonlinear Control, Volume 36, Issue 5, Page 2692-2704, 25 March 2026.
ABSTRACT This article addresses the control of mobile agents, termed followers, to track a time‐varying affine formation specified by a set of leaders. We present a distributed hierarchical method composed of a homogeneous high‐order sliding mode observer and a tracking controller. The observer estimates the followers' target trajectories from neighbor
Rodrigo Aldana‐López, Miguel Aranda, Rosario Aragüés, Carlos Sagüés   +3 more
wiley   +1 more source

S-Parameter Analysis of Three-Layered Aperture Coupled Antenna with a Flame Retardant-4 Composite Material as Substrate for Biomedical Applications [PDF]

Mechanics of Advanced Composite Structures
In biomedical applications, particularly for tumor detection, the need for high-resolution imaging systems is critical. This paper presents the “S” parameter analysis of a three-layer stacked microstrip antenna with Defected Ground Structure (DGS) having
G. S. Deepthy, M. Nesasudha, T. A. Karthikeyan   +2 more
doaj   +1 more source

Ultra-wideband radio signals distribution in FTTH networks [PDF]

, 2008
The use of an ultra-wideband (UWB) radio technique is proposed as a viable solution for the distribution of high-definition audio/video content in fiber-to-the-home (FTTH) networks.
Roberto Llorente, Marti, Javier, Alves, T., Morant, Maria, Beltran, M., Beltran, Marta, Maria Morant, Perez, J., Martí Sendra, Javier, Alves, Tiago, Llorente, Roberto, Cartaxo, A., Perez Soler, Joaquin, Cartaxo, Adolfo   +13 more
core   +1 more source

Underground Personnel Positioning Method Based on Self-training and NLOS Suppression

Taiyuan Ligong Daxue xuebao
[Purposes] The research of precise location of underground personnel in coal mine is of great significance to protect their life safety. The ultra-wideband signal is susceptible to non-lineof- sight (NLOS) interference, which will seriously affects the ...
SHAO Xiaoqiang, HAN Zehui, MA Bo, YANG Yongde, YUAN Zewen, LI Xin   +5 more
doaj   +1 more source

Towards a hardware implementation of ultra-wideband beamforming [PDF]

, 2010
This paper discusses and analyses the hardware implementation of an ultra-wideband (UWB) beamformer for UWB Impulse Radio data transmission. We use a Complex Programmable Logic Device (CPLD) acting as the binary baseband information source.
Wolfgang Gartner, Mark E. Beach, Geoff Hilton, Philipp K. Gentner, Christoph F. Mecklenbrauker, Gartner, W, Beach, MA, Mecklenbräuker, CF, Gentner, PK, Hilton, GS   +9 more
core   +1 more source

UWB slot-loaded Antipodal Vivaldi Antenna for through-the-wall radar imaging (TWRI) applications [PDF]

Serbian Journal of Electrical Engineering
The study presents an Ultra-Wideband Slot-loaded Antipodal Vivaldi Antenna (SL-AVA) designed for through-the-wall radar imaging (TWRI) applications. The antenna incorporates rectangular slots of varying lengths and widths, effectively extending ...
Ahmed Sajjad, Joret Ariffuddin, Katiran Norshidah, Abbasi Muhammad Inam, Aminuddin Nuramin Fitri   +4 more
doaj   +1 more source