Results 11 to 20 of about 14,554,155 (235)

Equivalent Source Method for Calculation of Periodic Commutation Electric Circuits [PDF]

Elektronika ir Elektrotechnika, 2011
In this paper the equivalent sources method which is intended to calculate the periodically switched electric circuits using harmonic analysis method is described. It is not possible to apply 'the harmonic analysis method to analyze such circuits, since the circuit configuration varies over time.
Bugenis, S.J., Vanagas, J., Gecys, S., Kauno technologijos universitetas   +3 more
openaire   +4 more sources

A refined wideband acoustical holography based on equivalent source method [PDF]

Scientific Reports, 2017
AbstractThis paper is concerned with acoustical engineering and mathematical physics problem for the near-field acoustical holography based on equivalent source method (ESM-based NAH). An important mathematical physics problem in ESM-based NAH is to solve the equivalent source strength, which has multiple solving algorithms, such as Tikhonov ...
Guoli Ping, Zhigang Chu, Zhongming Xu, Linbang Shen   +3 more
openaire   +3 more sources

High-resolution acoustic imaging method based on equivalent source method and reweighted minimization

Measurement + Control
Sparse regularization has been successfully applied to equivalent source method (ESM) in order to improve the acoustic imaging resolution. However, the application is not always feasible, especially at low frequencies. To overcome the problem, this paper
Yuan Liu, Wenqiang Liu, Yongchang Li, Dingyu Hu, Wenqian Jing   +4 more
doaj   +2 more sources

Review: The Use of Equivalent Source Method in Computational Acoustics [PDF]

Journal of Computational Acoustics, 2017
This paper reviews the equivalent source method (ESM), an attractive alternative to the standard boundary element method (BEM). The ESM has been developed under different names: method of fundamental solutions, wave superposition method, equivalent source method, etc. However, regardless of the method name, the basic concept is very similar; that is to
Seongkyu Lee
openaire   +3 more sources

A Forward−Backward Splitting Equivalent Source Method Based on S−Difference

Applied Sciences
The regularization method has a direct impact on the accuracy of the reconstructed sound field in the process of inverse calculation of near−field acoustic holography using the equivalent source method.
Jin Mao, Zeyu Wang, Jiang Liu, Danlong Song   +3 more
doaj   +3 more sources

Noise Directivity Reconstruction Radiated from Unmanned Underwater Vehicle’s Propeller Using the Equivalent Source Method

Sensors
Noise directivity reconstruction and prediction of noise levels at long ranges from such sources as unmanned underwater vehicles (UUVs) or aircraft are important practical problems.
Shuai Jiang, Liwen Tan, Ruichong Gu, Zilong Peng   +3 more
doaj   +2 more sources

3D inversion of magnetic gradient data based on equivalent source weighting method

AIP Advances
3D magnetic inversion is an important method for detecting underwater or underground magnetic objects, which can obtain the physical parameters and geometric features of the target.
Shuanglong Huang, Jing Qiu, Mingyu Li, Hexuan Sun, Shunyu Zhang   +4 more
doaj   +2 more sources

Half-Space Sound Field Reconstruction Based on the Combination of the Helmholtz Equation Least-Squares Method and Equivalent Source Method

Sensors
In practical conditions, near-field acoustic holography (NAH) requires the measurement environment to be a free sound field. If vibrating objects are located above the reflective ground, the sound field becomes non-free in the presence of a reflecting ...
Laixu Jiang, Yingqi Xi, Yingying Hu, Guo Wang, Jingqiao Liu   +4 more
doaj   +2 more sources

A Complex Equivalent Source Method for Scattering Effect of Aircraft Noise [PDF]

20th AIAA/CEAS Aeroacoustics Conference, 2014
An equivalent source method using equivalent monopoles in complex space is developed for calculating scattering effects for aircraft noise applications. The new method overcomes deficiencies in traditional equivalent real space source methods in treating
Hou, Yan, Zhang, Xin, Angland, David
openaire   +2 more sources

The Source Equivalence Acceleration Method [PDF]

Annals of Nuclear Energy, 2015
Abstract Fine-group whole-core reactor analysis remains one of the long sought goals of the reactor physics community. Such a detailed analysis is typically too computationally expensive to be realized on anything except the largest of supercomputers.
Everson, Matthew S., Forget, Benoit
openaire   +1 more source