Three-dimensional (3D) microwave imaging reflectometry has been developed in the large helical device to visualize fluctuating reflection surface which is caused by the density fluctuations. The plasma is illuminated by the probe wave with four frequencies, which correspond to four radial positions. The imaging optics makes the image of cut-off surface onto the 2D (7 × 7 channels) horn antenna ...

Existing impedance-based stability criterion (IBSC) for electromagnetic assessment of multiple-grid-connected-inverter (GCI)-based power systems suffers from several limitations. First, global feature is hard to be obtained if Nyquist-criterion-based IBSC used. Second, heavy computational burdens caused by either right-half-plane (RHP) poles calculation impedance ratios or nodal admittance matr...

Abstract: Electromagnetic energy radiated by antennas working in both the frequency domain and time domain is studied as a function of the charge associated with the current in the antenna. The frequency domain results, obtained under the assumption of sinusoidal current distribution, show that, for a given charge, the energy radiated within a period of oscillation increases initially with L/λ ...

Einstein-Maxwell theory implies the mixing of photons with gravitons in an external electromagnetic field. This process and its possible observable consequences have been studied at tree level for many years. We use the worldline formalism for obtaining an exact integral representation for the one-loop corrections to this amplitude due to scalars and fermions. We study the structure of this amp...

Abstract Consider observing two different waves with the same frequency and wavelength. When these are coupled, amplitude alternates between periodically, a phenomenon called coherent beating oscillation. Such phenomena can be seen in familiar coupled pendulums and, on cosmic scale, neutrino oscillations: oscillation types of neutrinos. In solids, other hand, there various wave excitations resp...

With the development of large-scale new energy, wind–thermal bundled system transmitted via high-voltage direct current (HVDC) has become main method to solve problem wind power consumption. At same time, subsynchronous oscillation among generators, (HVDC), and synchronous generators (SGs) increasingly prominent. According dynamic interaction doubly fed induction (DFIGs), HVDC, SGs, a lineariza...

In this paper, a physical principle that any matter must have finite energy is first proposed, which expressed and the under conditions. According to conservation principle, some laws with unclear reasons are explained: The mass of composite particle greater than sum component particles; potential smaller Any massless move at speed light independent conditions; velocity static field without can...

The spectrum analysis of interactions between biological tissues and the signals emitted by a specially designed electronic apparatus that incorporates a hybrid-state microwave stimulated emission amplifier-oscillator are described. The biological tissue provides an electromagnetic signature that could be used to investigate cases suspected disease or cancer. This methodology provides a structu...