Results 201 to 210 of about 7,507,875 (297)

A Comparative Sound Intensity Method for Measuring the Increase in Sound Insulation of Small Acoustic Metamaterial Samples. [PDF]

Sensors (Basel)
Agata P, Katarzyna BM, Bartłomiej Z, Mirosława LM, Dorota M, Katarzyna D.   +5 more
europepmc   +1 more source

Estimating red deer Cervus elaphus population density using drones in a steep and rugged terrain

Wildlife Biology, EarlyView.
Precise and accurate information about population density, crucial for wildlife management, is difficult to obtain for elusive species living in dense forests or steep and inaccessible terrain. Using unmanned aerial vehicles (UAVs), we developed a method for obtaining absolute population estimates of ungulates living in steep, rugged, and partly ...
Julie Bommerlund, Torbjørn Ergon, Simon Filhol, Atle Mysterud   +3 more
wiley   +1 more source

A Dual‐Frequency Sensitivity Model for Optical Fibre Ultrasonic Sensors in Power Transformer Partial Discharge Detection

High Voltage, EarlyView.
ABSTRACT The detection of partial discharges (PD) on the power transformer tank demands higher sensitivity in ultrasonic detection. To target the detection frequency band for sensor optimisation and enhance sensitivity, this paper presents a dual‐frequency sensitivity model for optical fibre ultrasonic sensors.
Sihan Wang, Jihang Sun, Jialin Wang, Bin Wei, Guoming Ma   +4 more
wiley   +1 more source

Mechanical and Acoustic Performance of Lightweight Cementitious Composites Incorporating Pumice and Expanded Perlite. [PDF]

Materials (Basel)
Yildirim YF, Emiroğlu M.
europepmc   +1 more source

Arc Resistance Enhancement of Converter Transformer Tank Through Structural Improvements: Simulation and Experimental Validation

High Voltage, EarlyView.
ABSTRACT Currently, limited research exists on the structural response and protection methods of the converter transformer tank for ± 800 kV ultra‐high voltage direct current transmission project to high energy arc faults. This research investigates the dynamic response and the vulnerable areas of the ultra‐high voltage converter transformer under the ...
Ke Wang, Shuqi Zhang, Yikun Zhao, Yichen Wang, Zongliang Zhang, Jinhua Zhang   +5 more
wiley   +1 more source

Characterization of Novel Partially Bio-Based, Waste-Derived Composites for Thermal and Acoustic Performance in Buildings. [PDF]

Polymers (Basel)
Ali M, Almuzaiqer R, Alshehri H, Alanazi MA, Alanazi MA, Almudhhi T, Nuhait A.   +6 more
europepmc   +1 more source

Sound Insulation Performance of Facades and Facade Elements.

The Journal of the INCE of Japan, 1997
openaire   +1 more source

Investigation of the Evolution Mechanism and Multiphysics Coupling in Tree‐Contact Single‐Phase‐to‐Ground Fault

High Voltage, EarlyView.
ABSTRACT Tree‐contact single‐phase‐to‐ground fault (TSF) is a common and hazardous type of failure in distribution networks. TSF is likely to occur when overhead conductors contact moist tree branches, potentially leading to insulation breakdown, posing serious threats to grid safety.
Wenjun Ning, Zuopeng Li, Mingxian Liu, Jianbo He, Tianxiang Chen, Shenli Jia   +5 more
wiley   +1 more source

Broadband low-frequency sound absorption and high insulation in a clay-cement composite with hydrogel-foaming engineered gradient porosity. [PDF]

Sci Rep
Hou Z, Zhou Z, Chen X, Zhang K, Li H, Zheng Y, Wang L.   +6 more
europepmc   +1 more source

Study on Raindrop Dynamic Behaviour and Its Impact on Insulator Flashover Characteristics Under Airflow Synergy

High Voltage, EarlyView.
ABSTRACT The synergistic effect of airflow on rainfall behaviour significantly impacts the flashover probability of insulators. This study combines experiments and simulations to investigate the influence of raindrop dynamic behaviour, shed structures and rainfall conditions on flashover characteristics under airflow conditions.
Keqi Huang, Xueqin Zhang, Song Xiao, Lirui Zhang, Yujun Guo, Guangning Wu   +5 more
wiley   +1 more source