Results 81 to 90 of about 11,029 (268)

Performance study of Internet traffic on high speed railways

2013 IEEE 14th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM), 2013
Railway transportation uses specific technologies such as GSM-R for traffic signaling purposes, but commercial networks could also provide added value services to passengers and transport companies such as CCTV or telemetry. Furthermore mobile users increasingly want to be always connected even when they are traveling.
F. Javier Rivas, Almudena Díaz-Zayas, Pedro Merino Gómez   +2 more
openaire   +2 more sources

Uncertainty, Sensitivity, and Efficiency Analysis of a Hybrid Piezoelectric–Electromagnetic Energy Harvester

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Digitalization and emerging technologies are increasing the demand for wireless sensing and the Internet of Things (IoT), which provide opportunities for autonomous sources of electricity in the form of energy harvesting systems. This paper focuses on the challenges in hybrid piezoelectric‐electromagnetic kinetic energy harvesting systems that
Petr Sosna, Damian Gaska, Zdeněk Hadaš
wiley   +1 more source

Topic Modelling for Object-Based Unsupervised Classification of VHR Panchromatic Satellite Images Based on Multiscale Image Segmentation

Remote Sensing, 2017
Image segmentation is a key prerequisite for object-based classification. However, it is often difficult, or even impossible, to determine a unique optimal segmentation scale due to the fact that various geo-objects, and even an identical geo-object ...
Li Shen, Linmei Wu, Yanshuai Dai, Wenfan Qiao, Ying Wang   +4 more
doaj   +1 more source

Detecting Loosening of Bolt‐Flanged Pipe Using Smoothed Pseudo Wigner–Ville Distribution: Digital Twin‐Based Approach Using Convolution Neural Networks

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this paper, an integrated digital twin‐based fault‐diagnosis framework is proposed to detect bolt loosening in flanged pipe connections. The approach combines finite element‐based numerical modeling, experimental modal analysis, and advanced signal processing‐assisted deep learning to achieve reliable loosening detection under operational ...
Milad Shabani Yousefabad, Behzad Totakhaneh Bonab, Morteza Homayoun Sadeghi, Mir Mohammad Ettefagh, Mohammad Reza Chalak Qazani   +4 more
wiley   +1 more source

Control Strategy of Subway Bidirectional Converter for Suppressing Grid Background Harmonics

Chengshi guidao jiaotong yanjiu
[Objective] The nonlinear power equipment in subway traction power supply systems causes distortions in grid voltage during operation, leading to large grid background harmonics, which will affect the grid-connected current quality of subway ...
ZHOU Xiangjie, LIU Xiaogui, QIAN Na, LI Songlin, ZHANG Dachuan   +4 more
doaj   +1 more source

Deep Feature Fusion with Integration of Residual Connection and Attention Model for Classification of VHR Remote Sensing Images

Remote Sensing, 2019
The classification of very-high-resolution (VHR) remote sensing images is essential in many applications. However, high intraclass and low interclass variations in these kinds of images pose serious challenges.
Jicheng Wang, Li Shen, Wenfan Qiao, Yanshuai Dai, Zhilin Li   +4 more
doaj   +1 more source

Energy Optimization Models for the Locomotive Assignment Problem

Networks, EarlyView.
ABSTRACT Reducing energy consumption is a key objective in transportation. Using detailed infrastructure data, this study introduces the Green Locomotive Assignment Problem (GLAP) to minimize energy consumption in railway operations by efficiently assigning locomotives to pre‐scheduled trains.
Gislind Baumgartner, Fatih Kocatürk, Ninja Scherr, Jan Fabian Ehmke   +3 more
wiley   +1 more source

Balancing forage and fear: How people, environment and predators shape reindeer grazing in the Fennoscandian tundra

People and Nature, EarlyView.
Abstract The long history of reindeer herding in Fennoscandia has shaped the mountain tundra by influencing its productivity, nutrient and carbon cycling and vegetation structure. By partly limiting shrub expansion, extensive reindeer grazing contributes to ecosystem resilience and helps mitigate climate change effects.
Marianne Stoessel, Felicia Wikinger, Regina Lindborg   +2 more
wiley   +1 more source

Shaking table test on damage mechanism of bedrock and overburden layer slope based on the time–frequency analysis method

Scientific Reports
To systematically analyze the damage caused by bedrock and overburden layer slope under seismic action, a set of large-scale shaking table test was designed and completed.
Changwei Yang, Guangpeng Chen, Mao Yue, Xianqing Xu, Ke Su, Zhuqing Li   +5 more
doaj   +1 more source

Effect of Ti3C2Tx MXene Incorporation on the Mechanical Performance and Microstructural Characteristics of Bulk Molding Compound Composites

Polymer Composites, EarlyView.
Graphical overview of the preparation, mechanical performance and microstructural characterization of low‐content Ti3C2Tx MXene‐reinforced BMC composites. ABSTRACT Bulk molding compound (BMC) composites are widely used in engineering applications; however, improving their mechanical response through low‐content nanoscale modification remains ...
Bilge Yılmaz, Cemal Meran, Cahit Bilgi
wiley   +1 more source