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According the universal serial cyclic redundancy check (CRC) technology, one of the new CRC algorithm based on matrix is refered, which descibe an new parallel CRC coding circuit structure with r matrix transformation and pipeline technology. According to the method of parallel CRC coding in high-speed data transmiting, it requires a lot of artificial calculation. Due to the large amount of calculation,...
A mathematical model that can well describe the kinetics of liquid/solid reaction between Sn-Ag-Cu solder balls and Cu substrates was developed in this study. The Cu consumption and the intermetallic compound (IMC) thickness as functions of reflow time for solder balls with different volumes and initial Cu concentrations were obtained from the model. Multiphysics finite element (FE) software was applied...
The design of a cylindrical transmission cloak that provides low scattering cross width (SCW) at microwave frequencies is proposed. The cloak is composed of concentric layers of identical dielectric resonators (DRs), while different air fractions are employed to enable the required spatial dispersion of the effective permeability. The cloak performance has been investigated by using full-wave simulations...
Dispersion properties of a rectangular metallic waveguide periodically loaded with dielectric resonators (DRs) are investigated both theoretically and by full-wave simulations. Forward and backward wave propagation has been observed in the waveguide at below cut-off frequencies for the fundamental TE10 mode, when the DRs exhibited electric and magnetic resonances, respectively. It is demonstrated...
This paper describes the resonance splitting phenomena in fragments of the microwave cloak metamaterial composed of split-ring resonators. Splitting of elementary resonances was observed within the bands exceeding 1 GHz that could obstruct spatial distribution of the effective parameters in the cloak prescribed by the transformation optics relations. At some split frequencies, however, groups of resonators...
The effects of cavity dimensions on the resonance frequency and resonance strength of the TE01δ mode in split post-dielectric resonator (SPDR) technique are investigated by using full-wave simulations. The results of simulations provide guidance for adjusting the dimensions of the SPDR fixture so that a strong TE01d resonance mode can be excited to correctly determine the complex permittivity of dielectric...
In short term, the preceding period of yield has negative effects on the current period of yield; the preceding period of price has positive effects on the current period of yield. In long term, the cost is the main influencing factor on yield, and positive effect; the price has little effect on the yield.
Facial expression plays an important role in face-to-face human-computer communication. Although considerable efforts have been made to enable computers to speak like human beings, how to express the rich semantic information through facial expression still remains a challenging problem. In this paper, we use the concept of “modality” to describe the semantic information which is related to the mood,...
Today, the problem of trusting cloud computing is a paramount concern for most enterprises. Whether user behavior is trusted and how to evaluate user's behavior trust are important research contents in cloud computing. This paper suggests an adaptive access algorithm by introducing the trust into cloud computing to decide the access control to the resources using an improved RBAC technique to solve...
This paper presents a framework for signal-level emulation of propagation effects over generalized fading channels at the scale of entire networks. Network emulation enables research into network- scale systems - which would otherwise be limited to low-fidelity network simulators and one-off field experiments - to use real radio hardware and realistic channel models. Our hardware and software architecture...
Using techniques developed by Kuznetsov to discrete-time systems, we study the stability of the equilibrium and Neimark — Sacker bifurcation (also called Hopf bifurcation for map) of a tri-neural network system. The theoretical analyses are verified by numerical simulations. Our results have potential applications in neural networks.
A simulation model in ATP-EMTP is proposed for calculating lightning transient responses of transmission lines. Both frequency dependent characteristic of transmission line and impulse corona effect are considered in this model. The frequency dependent characteristic is analyzed by Marti line model and a user defined corona model is applied to simulate the effect of impulse corona. The expression...
This paper presents an implementation of electric WebGIS sharing platform based on OpenScales and introduces related key technologies. Functionally, ‘sharing’ is implemented by way of ‘subscription’. In terms of software, open source software, GeoServer and OpenScales are used. These softwares uniform the standard, make the development more flexible and reduce costs. Technically, the idea of RIA(Rich...
Given the time series quarterly data of China from 1993 to 2006, we apply the SVAR model to analysis the effect of oil shock on GDP and price index of China and the monetary policy the government should take facing oil shock. The empirical result shows that the effects of oil shock on inflation and GDP are asymmetry, central bank can decrease the interests and put in currencies to regulate the macro...
In order to overcome the shortcomings of the traditional three-dimensional panoramic system that it can only obtain virtual three-dimensional experience at a certain point, this paper proposed an algorithm to generate panoramic image at any point based on the hexahedral model and sphere model. In accordance with the special rules, this algorithm maps the panoramic image generated by splicing the fish-eye...
Electromagnetic responses of linear arrays of cylindrical dielectric resonators, which are building blocks of metamaterials, are investigated by full-wave simulations and measurements in a standard waveguide in the microwave range. It is demonstrated that electromagnetic interaction between ceramic resonators fabricated of the material with the relative permittivity of ∼37 can cause the resonance...
We present a cylindrical electromagnetic cloak composed of identical ceramic dielectric resonators for operation in the microwave range. The performance of the cloak has been verified by full-wave simulations of the true multi-resonator cloak structure and by the measurements of the integral transmission through the fabricated prototype. It is demonstrated that due to inter-resonator coupling the...
Metro amount of ground during excavation and tunnel crown settlement and the amount of physical and mechanical properties of overburden, overburden thickness, and the excavation of the upper surface of the shape of the load, and many other factors. In this paper, the monitoring of land subsidence subway, on the subway excavation of ground observation data analysis, the results show that the surface...
The rectangle, square, triangle and circle are commonly used as the shape of infiltration basin. In this paper, influence of the shape of infiltration basin with the same area on recharge efficiency was studied through numerous simulations using the sand-box model. The hydraulic heads of groundwater were obtained within the domain of flow field. The recharge efficiency of different shapes was analyzed...
The static var generator (SVG) with appropriate control method is a good solution to solve the problem of reactive power impact and harmonic pollution which is generated by the nonlinear load. In this paper, a control strategy using active current separation and the current indirect control is used for SVG. The active current separation is a method for detecting the harmonic and reactive current,...
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