The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The partial element equivalent circuit method (PEEC) has been popularly used for signal integrity and power integrity. Its port setup usually only includes conductive effects in the format of current sources or voltage sources. However, its radiation effect was neither included nor studied. In this paper, for the first time we provide novel solutions to approximate the radiation contributions from...
Electromagnetic radiations from parasitic structures such as electronic interconnections are very difficult to diagnose because the ability to identify the specific sources are missing. Mainly, the source of radiations cannot be identified separately. Here, the partial element equivalent circuit (PEEC) method is extended to diagnose the radiation and its distribution. For the first time we identify...
Four-rotor dish-shaped UUV is a new type of equipment for aquaculture to survey water pollution, which can land on the seabed by extending the hydraulic support. In this paper, the instability state of the UUV is defined, and the mathematical model of the instability state is established. Unstructured mesh generation is carried out using Ansys ICEM. Considering the coupling of the UUV between flow...
A study of the right-hand side effect for an iterative solver is presented. The right-hand side determines whether a mode can be excited under certain excitation. Based on the matrix equation system Ā · x = b, different formulations are discussed including the electric field integral equation (EFIE), Calderón preconditioned EFIE with electro-quasi-static problems, and the magnetic integral equation...
This study presents a self-paced hybrid brain–computer interface (BCI) speller, which can be voluntarily turn on/off, by merging a motor imagery (MI)-based brain switch into a P300-based BCI. In this paradigm, the participants tried to perform the two different cognitive tasks sequentially, rather than simultaneously, and the multiple EEG components were processed sequentially. The practicability...
This paper presents a dynamic brain-computer interface (BCI) approach for multiple mobile targets selection in complex scene. In this study, two dynamic paradigms based on the P300 and the steady-state visually evoked potential (SSVEP) respectively were devised and tested by experiments. In the experiments, a video in which several people walks around in a laboratory is presented on the screen, with...
The accuracy of wind plant power control strategy is the key to ensure the adaptability of the wind plant. Effective testing and verification are essential means for the correctness of the control strategy. In this paper, the principle of active and reactive power control system for wind plant is studied firstly, the implementation architecture of power control system of wind plant is analyzed then,...
Noninvasive measurement of blood pressure by optical methods receives considerable interest, but the complexity of the measurement and the difficulty of adjusting parameters restrict applications. We develop a method for estimating the systolic and diastolic blood pressure using a single-point optical recording of a photoplethysmographic (PPG) signal. The estimation is data-driven, we use automated...
The characteristic mode analysis is presented based on the potential-based integral equation, where the vector potential equation and the scalar potential are formulated separately and solved in tandem. Accordingly, the theory of the characteristic modes, originated from the electrical field integral equation (EFIE), can be analyzed for the novel potential-based integral equation system with the contributions...
Plasmonic nanostructures that support surface plasmon (SP) resonance potentially provide a route for the development of nanoengineered nonlinear optical media. In this work, a novel plasmonic particle-in-cavity nanoantenna (PIC-NA) is proposed. The second harmonic generation (SHG) of the PIC-NA under strong localized SP resonance is systematically analyzed by a self-consistent numerical solution based...
In this work, the nonlinear response from metallic metamaterials is characterized by a finite-difference time-domain solution to the Maxwell-hydrodynamic equations. The spatial locations of E-fields (and electric currents) are interleaved with that of magnetic fields. The electron charge is at the center of Yee grids. The current continuity equation connects Maxwell and hydrodynamic equations. For...
Nanoantennas have demonstrated unprecedented capabilities for manipulating the intensity and direction of light emission over a broad frequency range. The directional beam steering offered by nanoantennas has important applications in areas including microscopy, spectroscopy, quantum computing, and on-chip optical communication. Although the Kerr effect has been explored to control the far-field radiation...
Due to the increase of the operating frequency and the complexity of modern microwave circuits, transient hybrid field-circuit simulations have aroused great interest in the field of heterogeneous electromagnetics such as signal integrity/power integrity (SI/PI), electromagnetic compatibility/electromagnetic interference (EMC/EMI), etc‥ A novel transient field-circuit cosimulation method based on...
This paper is to present a new numerical method which can be used in computational electromagnetics in microwave remote sensing of random discrete medium embedded with irregular shape of scatterers. Current Radiative Transfer (RT) theoretical modeling is normally used to simulate wave propagation in the medium and wave scattering by basic shapes of scatterers, e.g., cylinder, disk, needle or sphere...
The reduction of electromagnetic radiation and couplings is a fundamental issue for electromagnetic compatibility (EMC) and electromagnetic interference (EMI) issues. Even though they represent distributed sources, radiation physics was seldom mapped to the geometry of the structure. In this paper, we develop a new approach based on PEEC to calculate the distributed sources for radiation and the couplings...
Proper power integrity analysis is required for printed circuit board (PCB) power distribution network (PDN) design. Developing a simple physics-based equivalent circuit model for critical structures is essential for understanding the physics of the system and for intelligent designs. In this paper, a physics-based model size reduction (PMSR) method is applied to get the equivalent circuit model for...
A novel transient field-circuit cosimulation method based on the discontinuous Galerkin time domain (DGTD) method and circuit behaviour macromodels for heterogeneous electromagnetics such as EMC problems is proposed. The traditional field-circuit simulation method needs to know the detail of the circuits, which cannot handle problems with unknown systems due to IP protections. To overcome this problem,...
Compared to active triangulation systems, the binocular vision ones have the superiority of low cost and small size for real-time 3-D sensing. The guided-filter driven stereo matching is state-of-the-art from the viewpoints of denseness and edge-preserving. However, as most of stereo matching algorithms, the high computation and storage prevent the guided-filter driven one from being integrated on...
Chiral structures are composed of periodically arranged asymmetric particles. The asymmetry of chiral particles results in extraordinary properties like negative refraction index, giant optical activity and circular dichroism. Consequently, they have applications in super lens and various polarization controllers. There are two types of chiral structures, namely planar and 3D structures. The planar...
In this paper, a new novel patch based Butler Matrix using 3-dB square-patch coupler and triangular-patch wideband phase shifter is presented. By inserting a via hole along the symmetrical plane of the triangular patch, the bandwidth of the transmitting response is significantly increased. In order to obtain a 45° phase difference and a wideband phase response, a reference line with high characteristic...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.