Results 11 to 20 of about 88,367 (250)

Photoelastic stress analysis assisted evaluation of fracture toughness in hydrothermally aged epoxies [PDF]

Fracture and Structural Integrity, 2014
The present work has investigated the fracture toughness of a model DGEBA epoxy system subject to Hidro-Thermal aging. A Photoelastic Stress Analysis technique has been implemented, showing the evolution of stresses arising throughout the water uptake ...
G. Pitarresi , A. Toscano , M. Scafidi , M. Di Filippo , S. Alessi , G. Spadaro   +5 more
doaj   +3 more sources

Characterization and prediction of hygrothermally aged CFRP adhesive joint subjected to mode II load

Composites Part C: Open Access, 2023
Carbon fiber composite adhesives joints provide higher specific strength and fatigue life than traditional joints. However, carbon fiber composites and adhesives are polymeric materials that may lose their integrity in hygrothermal environment ...
Mohd. Tauheed, Naresh V. Datla
doaj   +1 more source

Minimum Age of Information in the Internet of Things With Non-Uniform Status Packet Sizes

IEEE Transactions on Wireless Communications, 2020
In this paper, a real-time Internet of Things (IoT) monitoring system is considered in which the IoT devices are scheduled to sample underlying physical processes and send the status updates to a common destination. In a real-world IoT, due to the possibly different dynamics of each physical process, the sizes of the status updates for different ...
Bo Zhou 0012, Walid Saad 0001
openaire   +2 more sources

Investigating Fourteen Countries to Maximum the Economy Benefit by Using Offline Reconfiguration for Medium Scale PV Array Arrangements

Energies, 2020
Over the past few years, electricity demand has been on the rise. This has resulted in renewable energy resources being used rapidly, considering the shortage as well as the environmental impacts of fossil fuel.
Mohammed Alkahtani, Yihua Hu, Mohammed A Alghaseb, Khaled Elkhayat, Colin Sokol Kuka, Mohamed H Abdelhafez, Abdelhakim Mesloub   +6 more
doaj   +1 more source

Cost Effective Offline Reconfiguration for Large-Scale Non-Uniformly Aging Photovoltaic Arrays Efficiency Enhancement

IEEE Access, 2020
In the past decades, a huge number of large-scale photovoltaic (PV) plants have been constructed all around the world. However, the capital and operational costs can be high, which limits their widespread applications.
Zuyu Wu, Chen Zhang, Mohammed Alkahtani, Yihua Hu, Jiangfeng Zhang   +4 more
doaj   +1 more source

Non-Uniform Aged Modules Reconfiguration for Large-Scale PV Array [PDF]

IEEE Transactions on Device and Materials Reliability, 2017
In the past decades, a large number of photovoltaic (PV) plants have been built. Due to the minor physical differences between PV cells and the influence of environmental factors such as rains, temperature, and humidity, the aging of a PV array is often distributed unevenly within each PV module.
Yihua Hu, Jiangfeng Zhang, Peng Li, Dongsheng Yu, Lin Jiang   +4 more
openaire   +1 more source

Effects of power transformer high-frequency equivalent circuit parameters non-uniformity on fault diagnosis using SFRA test

Ain Shams Engineering Journal, 2022
The electric power transformer is an essential component of an electrical power system because it regulates the voltage level to provide the best possible system operation.
Khalid H. Ibrahim, Nourhan R. Korany, Saber M. Saleh   +2 more
doaj   +1 more source

Non-Uniform Input-Based Adaptive Growing Neural Gas for Unstructured Environment Map Construction

Applied Sciences, 2022
The research and development of special robots such as excavation robots is an important way to achieve safe and efficient production in coal mines.
Suyu Wang, Ze Ren, Miao Wu
doaj   +1 more source

Incremental Capacity Analysis as a State of Health Estimation Method for Lithium-Ion Battery Modules with Series-Connected Cells

Batteries, 2020
Incremental capacity analysis (ICA) has proven to be an effective tool for determining the state of health (SOH) of Li-ion cells under laboratory conditions.
Amelie Krupp, Ernst Ferg, Frank Schuldt, Karen Derendorf, Carsten Agert   +4 more
doaj   +1 more source

Unusually high room and elevated-temperature tensile properties observed in direct aged wire-arc directed energy deposited Inconel 718

Scientific Reports, 2023
Wire-arc directed energy deposition (DED) processed Inconel (IN) 718 is known to have coarse columnar grains, strong texture, and significant chemical and microstructural inhomogeneity in the as-fabricated condition.
Jie Song, Xavier A. Jimenez, Carissa Russell, Albert C. To, Yao Fu   +4 more
doaj   +1 more source