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A stability analysis of Networked Control Systems based on the Industry Ethernet Ring Network is presented in this paper. The frame loss of the Industry Ethernet Ring Network is regarded as a random event. The sufficiency conditions for asymptotically stability of the stochastic discrete linear time-variant system are presented and proved using a new method in this paper. A Networked Control System...
In this paper, we propose a multimodal multimedia retrieval model based on probabilistic Latent Semantic analysis (pLSA) to achieve multimodal retrieval. Firstly, We employ pLSA, to respectively simulate the generative processes of texts and images in the same documents. Then we employ the multivariate linear regression method to analyze the correlation between representations of texts and images...
In order to develop the microwave and millimeter-wave vacuum electronic radiation source devices with field emission cold cathodes, an electron-optical system based on carbon nanotube cold cathode is investigated in this paper. A magnetron injection electron gun is designed for a 220GHz TE03 mode gyrotron. And the preliminary experiment results of the carbon nanotube cathode show the maximum beam...
Based on application conditions of CRH EMUs wheel-set, a more strictly ultrasonic inspection for online wheel-set is required. To find an optimized solution, phased array ultrasonic testing technology mixed with conventional ultrasonic testing technology is studied. In this article, multi probes arrangement on wheel tread and inner wheel rim are designed, and their ultrasonic fields in wheel rim &...
An epidemic model with infectivity and recovery in both latent and infected period is introduced. Utilizing the LaSalle invariance principle and Bendixson criterion,the basic reproduction number is found, we prove that the disease-free equilibrium is globally asymptotically stable when the basic reproduction number is less than one. The disease-free equilibrium is unstable and the unique positive...
Trend extraction is an important tool for the analysis of data sequences. This paper presents a new methodology for trend extraction based on Hilbert-Huang transform. Signals are initially decomposed through use of EMD into a finite number of intrinsic mode functions (IMFs). The Hilbert marginal spectrum of each IMF is then calculated and a new criterion, termed the cross energy ratio of the Hilbert...
In the previous work we proposed a method to correct the bias in localization algorithms in n dimensional space with an arbitrary number of sensors at known locations. The key mathematical tools used in the bias-correction method are Taylor series and Jacobian matrices. In this paper an enhancement protocol based on a grouping idea is proposed. The proposed protocol can be used when extra sensors...
Stereology is an interdisciplinary method of mathematics and morphology, and is unbiased, quick, accurate, noninvasive, and has high reproducibility. It is widely used in radiation imaging and cell biology. In this paper, the confocal laser scanning microscopic images (CLSMI) of tumor cells of MCF-7 and B16/ GPR4 were quantitatively analyzed using stereological point counting method. 22 images of...
Based on the mixture theory, to clarify the mechanism of macro segregation of blooms, a mathematical model of macro segregation coupled with a heat transfer equation and a solute balance equation is developed. The software is built with VC++ as the program language to predict the process, which can simulate the temperature filed, the solute concentration in the central portion and so on. The semi-analytical...
In this paper, we study the interactions between two Secondary Wireless Service Providers (WSPs) in different situations: competitive and cooperative. WSPs acquire spectrum by leasing from spectrum broker and then sell spectrum to secondary users by providing services. Users follow Wardrop's principle and choose WSPs with lowest perceived price which is associated with price and quality of service...
Numerical simulation of the internal flow field in a new wet dust removal device for quick lime slaking is studied by the software FLUENT, with κ-ε turbulence model and SIMPLE algorithm. The results show that it is favorable for the dust removal to adopt tangential outlet, which can retard the escape of gas flow from the outlet, the best gas velocity is 15m/s, besides, when the number of nozzles is...
In this paper, we investigate nonlinear dynamic behaviors of a piezoelectric plate. By the methods of boundary integration and modal truncation, the partial differential equation governing the vibration of piezoelectric plates has been derived. The piezoelectric resonator is described as a parametrically excited nonlinear vibration system. The calculations based on the coupled-mode equations based...
A novel algorithm for evaluating the quality of movable signal coverage in gridded area is proposed in this paper. The algorithm makes use of minimum mean-squared error rule to fit the path loss formula in Okumura-Hata model, combining the existing field test data, and then calculates the signal strength of each grid in the designated area by combining the fitted path loss formula and the parameters...
Because of belonging to the information of system condition, the noise degree of signal could be utilized to express the difference of system condition. After obtaining the symbolic probability series by the signal time series, the symbol-chaos characteristics, which could identify the noise degree of signal, are constructed with the four parameters that are symbolic Shannon entropy, symbolic Kolmogorov...
We present a novel numerical approach for solving inverse source problems using time domain TLM. Our algorithm reconstructs the unknown excitation sources in the time domain using the observed field outside the source region. In this work, we apply our algorithm to thin source regions consisting only of boundary cells. The source reconstruction for this case is always unique and does not require any...
Selective assembly is an effective way to achieve precision assembly with economical manufacturing processes based on mass production for mating parts with high precision requirements. The tolerance zone divisions of grouping for mating parts are usually fixed, and the tolerances of hole and shaft are designed to be equal in current selective assembly. But, remanufacturing of mating parts is usually...
Intelligent optimization algorithms based on biological mechanisms have better performance than traditional ones in solving complex multimodal function optimization problems. Most of those intelligent algorithms, however, have the problems of degeneration and vibration, which will lead to poor global optimization and low convergence speed. Inspired by the features of MHC (Major Histocompatibility...
This paper studies the problem that how social norms emerge even though agents are selfish and attempt to only maximize their own utility. We propose a new rule for social interactions. The rule is called Highest Rewarding Neighborhood (HRN). The HRN rule allows agents to remain selfish and be able to break relationships in order to maximize their utility. Our experiment shows that when agents are...
Influence of production cost on export price is always the hot topic of foreign trade research. Previous researches just use original series to establish models but not fully discover information content of time series signals. Taking China's citrus trade for example, the paper uses wavelet analysis to decompose production cost and export price into four series, which are trend, cycle, volatility...
This paper proposes a new mathematical QoS model called LRD_Q_Model for long range dependence (LRD) multimedia flows on the basis of network calculus theory. In LRD_Q_Model, the packets of a LRD flow are regulated by the Fractal Leak Bucket model at the edge nodes of networks and scheduled by the weighted fairness queuing (WFQ) model at each router of the transmission path. We give the service curve...
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