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This paper addresses the issue of lag consensus of the leader-following multiagent systems with communication delays and switching topologies. Lag consensus means that the states of the followers lag that of the leader. Based on the graph theory and the common Lyapunov-Krasovskii functional method, we design a protocol ensuring the lag consensus of multiagent systems with communication delays under...
An planar extremely subwavelength Mu-negative metamaterials is presented at low frequencies, composed of periodically arranged lumped components and subwavelength distributed structures with the combination of double layer rectangular spiral unit structure. The magnetic polarizability is induced by the resonance of the dual-layer metamaterials excited by an alternating electromagnetic field. The equivalent...
In this paper, metamaterials are regarded as a kind of specific medium. The application of three-dimensional electromagnetic field finite element mesh generation methods makes a finite element analysis and calculates the integral to metamaterials and its surrounding spatial structures so as to solve the spatial distribution of meta-materials and its surrounding electromagnetic parameter B and H under...
In order to study the spatial and quantitative relationship between land use and economic development level of cities and towns in Shandong Province, land use and economic and social data of 108 cities and towns in Shandong Province were chosen. First of all, the global spatial autocorrelation Moran's I was calculated to explore the spatial agglomeration features of the amount of land use data and...
This paper proposes a probabilistic Latent Emotion Analysis (pLEA) model, which is an extension of probabilistic Latent Semantic Analysis (pLSA) model, to discover latent emotion topics considering theoretical and empirical concepts from psychology and art theory. The traditional pLSA models performed poorly since the statistical model are hardly narrowing the semantic gap between low-level image...
The tension control technology of unit-type gravure printing machine is very important. The constant printing tension is the key factor to ensure the overprinting quality. So the research on modeling theory and control technology of control system becomes an important problem to restrict the technology development of unit-type gravure printing machine. In this paper, the winding tension system of...
This paper presents our observation of the abnormal Doppler effect inside a reconfigurable balanced transmission line, which has zero index at the balanced frequency. By applying a digital signal controller, a moving reflective interface is built inside this transmission line. The normal, inverse and zero Doppler effects are observed at different frequencies, which gives a completed picture of Doppler...
The designing of the two-dimensional extremely subwavelength epsilon-negative metamaterials is presented at radio frequencies. The operation of the proposed components originates from the resonance of a dual-layer metamaterial of inclusions excited by an alternating electric field. The real part of permittivity should be assuming negative values in the artificial materials from 11.1MHz to 14MHz. To...
An oscillator with band-pass quadrature outputs is proposed in this paper. Band-pass quadrature couplers are incorporated in the feedback path of the oscillator to improve stopband inhibition. The proposed oscillator was fabricated on an FR-4 substrate for verification. The measured output power at 2.06 GHz is −4.6 dBm. Phase noises of −104.8 dBc/Hz and −124.6 dBc/Hz at 100 kHz and 1 MHz offset frequencies...
Combining the metamaterials (MMs), which possess the ability to manipulate the electromagnetic (EM) field, with the wireless power transfer (WPT) system is a new trend. In this paper, a new WPT system is proposed, which is based on the MMs electromagnetic tunneling phenomenon. This system consists of two back-to-back sandwiches structure. The sandwiches structure is classic EM tunneling model which...
Charge-trapping (CT) flash memory devices with Ge channel are studied for the first time. The operation characteristics of Ge-channel devices with different interfacial layers (IL), including GeO2, GeON, and AlON, are investigated. The programming/erasing speeds of devices with Ge channel can be significantly improved as compared with those with Si or SiGe channel. The retention properties of Ge-channel...
This paper presents a novel template matching algorithm that copes with the occlusion on the target image. Most of the previous methods are sensitive to the occlusion because it induces some patches with similar semantic concepts but distinct appearances. Thus the template matching algorithm hardly accomplishes the task based on the appearance similarity only. To overcome this limitation, we integrate...
According to the Doppler Effect, the frequency of the incident wave changes when there is a relative motion between the source and the detector in normal substances with both permeability and permittivity positive. While in metamaterials with both permeability and permittivity negative, the inverse Doppler Effect would occur and the variation of the frequency is opposite to the normal Doppler Effect...
The inverse Doppler effect has been proposed for over four decades. However, there are only few experiments on it, nor to mention the practical application. The main reason is that it is difficult to build a relative movement between the source and detector in double negative materials (DNG), in which the inverse Doppler effect would happen. Here we report a practical method to realize the inverse...
A three-dimensional magnetic metamaterials structure which can be assembled combination and obtained easily was proposed in this paper. A sophisticated "slot" and "bugle" structure was designed at the edge part metamaterials unit structure and neighboring cells bite mutually together through them in order to achieve extensions in three perpendicular directions of Cartesian coordinate...
Broadband frequency selective directing of electromagnetic waves on the interface between the anisotropic metamaterials and conventional materials based on the two dimensional transmission line grids is realized. In certain frequency region, the dispersion relation of the anisotropic metamaterials shows two different kinds of behaviors beside the resonance frequency. The interface consisted of the...
It is essential to detect the state of EMU's component while running, since any small and subtle failure may cause major accidents in high-speed running. The traditional detection approach adopts the image matching technology, which suffers from the problem when the two images dislocation. The drawback stems from the image matching approach based on the visual features only easily affected by the...
Electromagnetic (EM) wave tunneling through an epsilon-negative (ENG) waveguide has been realized when it paired with mu-negative (MNG) waveguide. The ENG waveguide is imitated by a hollow metallic waveguide which operating below cutoff frequency. The MNG waveguide is implemented by standard waveguide filled with square split resonate rings (SSRRs). The dimensions of the MNG waveguide differ from...
A one-dimensional (1-D) leaky-wave antenna (LWA) with different radial direction working at 13.2GHz is presented. The antenna was based on Fabry-Perot cavity which composed of a planar partial reflective surface (PRS) and a high impedance surface (HIS). The PRS was made by a printed circuit board which consisted of an array of printed dipoles and the printed circuit's dimension was modulated to reduce...
The equivalent oxide thickness in Ge MOS device is scaled down to 0.39 nm, and the leakage current is decreased as well. The improvement can be attributed to the in-situ Ge sub-oxide desorption process in an ALD chamber at 370 °C. About 95% Ge4+ in HfGeOx interfacial layer are obtained by H2O plasma process together with in-situ desorption before atomic layer deposition.
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