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In this paper, the problem of robust sliding mode control is studied for a class of discrete delayed nonlinear systems subject to randomly varying nonlinearities (RVNs) under uncertain occurrence probability. Here, the time-varying delay is bounded with known upper and lower bounds. The RVNs under uncertain occurrence probability are characterized by utilizing a Bernoulli distributed random variable,...
The environment-friendly perovskite solar cell materials CH3NH3PbI2.75Cl0.25 was investigated by using the CASTEP software package in Materials Studio (MS) software. For the CH3NH3PbI3 cell, six kinds of the structure and physical properties of the I anion replaced by one Cl anion were built and calculated. Firstly, the geometrical optimization and energy optimization of the six kinds of configurations...
In this paper, one fast method for analyzing printed circuits based on matrix high-dimensional interpolation schemes has been presented. By virtual of the bi-interpolation on the plane of the frequency direction and the dielectric constant direction, the proposed method can greatly reduce the global time consuming of matrix fillings, and it can greatly improve the efficiency of multi-parameter scanning...
In this paper, the generalized single-source tangential equivalence principle algorithm (GSST-EPA) is proposed to solve the electromagnetic scattering of array structures with very small distance or even connected elements. This GSST-EPA can reduce the number of unknowns by half via the extinction theorem, and keep the good accuracy by using tangential field projection. Based on source reconstruction...
An integral equation with non-conformal and non-overlapping domain decomposition method has aroused wide interest in the engineering community. The contribution of this paper is twofold: (I) In the framework of IE-DDM, phase-extracted (PE) basis function is employed to reduce the required number of unknowns in the large and smooth sub-domain. (II) A reverse operation self-consistent evaluation (ROSE)...
In this paper, a surface integral equation domain decomposition method (SIE-DDM) with phase extracted (PE) basis function is presented for the solution of electrically large problems. This kind of basis functions with the traveling wave variation can be defined on the relative large grids. so they are suitable for the decomposed smooth large subdomains to further reduce the required number of unknowns...
In this paper, a hybrid volume-surface electric field integral equation approach is developed to calculate the electromagnetic scattering from planar thin dielectric structures (dielectric materials or composite conductor-dielectric objects). The volume integral equation (VIE) is used for thin dielectric layers. To reduce the number of unknowns and accelerate the solution, the prism elements are employed...
The robust transceiver design in dual-hop up-link multi-user multiple-input multiple-output (MIMO) system with amplify-and-forward relay is presented in this paper. Different from the most existing works, a complex channel model is adopted, the antenna correlation at both ends of the channel and the channel estimation errors are taken into account. The proposed design method provides a joint iterative...
Electromagnetic radiation for a printed circuit board (PCB) midplane connector is studied in this paper. By applying integral-equation (IE) based method and characteristic mode (CM) analysis, the current is split into radiating and non-radiating ones. The radiated power from each part of the structure can be quantified using the radiating current. Therefore, the radiation hot spot can be identified...
The nonconformal domain decomposition method (DDM) of the hybrid finite element-boundary element(BEM) with FETI (finite element tearing and interconnecting) like algrithm and multilevel fast multipole algorithm (MLFMA) are presented for computing large electromagnetic scattering problems in this paper. Due to the Robin-type transmission conditions, it is possible to employ nonconformal interface discretizations...
This paper proposes a low profile wideband pattern reconfigurable stacked patch antenna, which is composed of four antenna elements. Each antenna element has two switchable feeding ports. Individual excitation at the two feeding ports can produce a 180° phase-shifting due to the symmetrical structure. A reconfigurable 2×2 prototype is developed by employing four single-pole double-throw (SPDT) switches...
A good initial guess is critical for the convergence of the steepest descent method. This paper presents a new method to estimate the initial guess of the near field phase. Based on image theory, tangential near fields on two scanning planes are linked by a radiation matrix. The radiation matrix is then scaled by the near field amplitudes. It is shown that the phase of an eigenvector of the scaled...
Average received power by an antenna in reverberation chamber (RC) is found to be related by its directivity to the same antenna's received power in an anechoic chamber (AC). In order to verify this relationship, this paper studies the received power of a monopole antenna in RC and AC. It is found that theoretically predicted ratio between received power in AC and RC agrees with the measured one at...
This paper presents a total/partial field scheme to model current sources near a wall of reverberation chambers (RCs). Such current sources cannot be modeled by the regularization technique or the total/scattered field scheme. Therefore, a total/partial field scheme is proposed to facilitate modeling of the current sources. In the proposed total/partial field scheme, the total field is decomposed...
In a surgery grading management system, surgeries are classified according to their operation difficulty and the complexity, surgeons' qualification is divided based on their experience and educational level, and a surgery of certain difficulty could only be done by a surgeon of certain qualification, therefore the operation risk cost could be reduced. When implementing surgery grading management...
Sparse source reconstruction is an effective method to find the radiation source from the near field scanning. Therefore, it is attractive to use sparse source reconstruction to locate failing elements in a failing array. This paper presents recent advances of sparse source reconstruction for near-field-based array diagnosis. First, fundamental formulation of near-field-based array diagnosis using...
The phase of near Held plane wave spectrum is useful for phased-array calibration. In order to calculate the phase of near fleld plane wave spectrum accurately, the influence of near-fleld scanning parameters on plane wave spectrum phase error is studied in this paper. The calculation of near field plane wave spectrum is efficiently implemented by using the fast Fourier transform. The accuracy of...
In this paper, the finite-time H∞ state estimation problem is investigated for a class of discrete-time memristive recurrent neural networks (DMRNNs) subject to randomly occurring time-delay and missing measurements. Two random variables obeying the Bernoulli distribution are employed to characterize the randomly occurring time-delay and missing measurements, where the corresponding occurrence probabilities...
CH3NH3PbI3 perovskite is an organic-inorganic hybrid material that has attracted attention recently as a candidate for photovoltaic applications because of its superb semiconductor characteristics. The first principle is adopted to study the structural, density of states and optical properties of orthorhombic self-doped perovskites (CH3NH3)1−xPbI3(A:=0.00, 0.25, 0.50, 0.75, 1.00). With the content...
This paper presents a method to extract structural spectral features from spectral envelopes using what-where autoencoders (WWAE) for statistical parametric speech synthesis (SPSS). A WWAE is constructed by concatenating a convolutional net for input encoding and a deconvolutional net for reconstruction. The output values of the max-pooling layer in the encoder and the positions of the max-pooling...
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