Results 31 to 40 of about 421,517 (209)

Influence of Different Energy Supply Methods on Performance of Ablative Pulsed Plasma Thrusters

Frontiers in Energy Research, 2021
For a certain configuration of ablative pulsed plasma thruster, changing the initial energy is an effective way to optimize the performance of the thruster.
Rui Zhang, Rui Zhang, Wenxiong Xi, Wenxiong Xi, Qiang Huang   +4 more
doaj   +1 more source

Comprehensive evaluation of corroded grounding electrodes considering the impulse characteristics

Frontiers in Materials, 2023
The grounding electrodes are buried in a harsh soil environment, which will cause corrosion. Corroded grounding electrodes directly affect the safe and stable operation of the power system.
Xuemeng Wang, Lan Xiong, Zhanlong Zhang, Yihua Dan, Jun Deng   +4 more
doaj   +1 more source

Effect of Enhancement Material on the Performance of Ground Electrodes Under Impulse Conditions

IEEE Access
Among the factors that affect the soil resistivity is the chemical content in soil, where the ionic conduction is expectedly increased and the soil resistivity is reduced.
Usman Muhammad, Nurul Nadia Ahmad, Normiza Mohamad Nor, Fazlul Aman   +3 more
doaj   +1 more source

Impact of time parameters of lightning impulse on the breakdown characteristics of oil paper insulation

High Voltage, 2016
At present, the insulation performances of electrical apparatus under lightning impulse voltages are always evaluated by the withstand test of standard lightning impulse voltage (1.2/50 µs), which is recommended by IEC Standard.
Wenxia Sima, Potao Sun, Ming Yang, Jingyu Wu, Jiefang Hua   +4 more
doaj   +1 more source

Muscle-Specific Effective Mechanical Advantage and Joint Impulse in Weightlifting [PDF]

, 2016
Lifting greater loads during weightlifting exercises may theoretically be achieved through increasing the magnitudes of net joint impulses or manipulating the joints’ effective mechanical advantage (EMA).
Harris, Chad, Kipp, Kristof
core   +1 more source

Dynamics Modeling and Characterization of Sunk Screw Connection Structure in Small Rockets

Aerospace, 2022
Bolted flange joints are widely used in engineering structures. Sunk screw connection structures commonly used in small rockets and missiles exhibit significant nonlinear characteristics when subjected to forces.
Xiaotian Zhang, Ruiqing Wang, Xiaogang Li, Chengyang Lu, Zhengkang Wang, Wenlong Wang   +5 more
doaj   +1 more source

Tracking antenna deformation program [PDF]

, 1971
Computer program provides capability for analyzing accelerometer data obtained from impulsive testing of large antennas, and of determining from that data pertinent characteristics /amplitude, frequency, damping/ of the structural modes excited by the ...
Galef, A. E.
core   +1 more source

Impulse Characteristics of Soil Treated with Enhancement Materials and Various Moisture Contents

Applied Sciences
Due to the high mineral contents of additives and enhancement materials (EMs), EMs have become popular in treating soil, which expectedly improves the electrical characteristics of soil.
Usman Muhammad, Fazlul Aman, Normiza Mohamad Nor   +2 more
doaj   +1 more source

Joint Decision-Directed Channel and Noise-Variance Estimation for MIMO OFDM/SDMA Systems Based on Expectation-Conditional Maximization [PDF]

, 2011
A joint channel impulse response (CIR) and noise-variance estimation scheme is proposed for multiuser multiple-input–multiple-output (MIMO) orthogonal frequency-division multiplexing/space-division multiple access (OFDM/SDMA) systems, which is based on ...
Hanzo, Lajos, Mu, Xiaomin, Zhang, Jiankang   +2 more
core   +1 more source

Investigations on the Performance of a New Grounding Device with Spike Rods under High Magnitude Current Conditions

Energies, 2019
In many publications, the characteristics of practical earthing systems were investigated under conditions involving fast-impulse currents of different magnitudes by field measurements.
Abdul Wali Abdul Ali, Nurul Nadia Ahmad, Normiza Mohamad Nor, Muhd Shahirad Reffin, Syarifah Amanina Syed Abdullah   +4 more
doaj   +1 more source