Abstract:For multiple-input single-output output-error systems,a difficulty is that the information vector in the identification model contains the unknown system outputs (true outputs or noise-free outputs),thus the standard identification algorithm cannot be applied directly.This paper presents a stochastic gradient identification algorithm based on the unknown output estimation.The basic idea is to replace the true output with the output estimate which is predicted/estimated by the estimated model,and also to compute the system parameter estimates by using the output estimates.Convergence of the proposed algorithm is studied and a simulation example is provided.

Abstract:The synthesis problem of sliding mode variable structure control is investigated for a class ofuncertain Delta operator system with internal parameter perturbation and external disturbance.The differences and similarities of designing sliding mode controller based on two types of idealreaching law and exponential reaching law.The proposed methodsbring previous related conclusions of continuous time system and discrete-time system into unified delta operator system.Slidingmode control system designed by employing two types of reaching lawsnot only can reach the region of the switching surface in finite time,but also decrease the system chattering effectively.The simulation results illustrate the the feasibility and validity ofthe proposed approaches.

Abstract:The design problem of full order H_∞ filter for continuous singular system is addressed in this paper,in order to design satisfactory full order H_∞ filter with regular and impulse-free filter error dynamics.Lyapunov-Krasovskii functional and quadratic inequality method was used to get H_∞ time-delay criterion of filter error dynamics.A sufficient condition of robust H_∞ filter existence of singular system is provided.Finally,a numerical example is given to verify the effectiveness and practicability of the design method.

Abstract:In this paper,we construct the auxiliary equation with the method of upper and lower solutions,combined with Leray-Schauder degree theory,to obtain the existence of positive solutions for second order multi-point boundary value problems with p-Laplacian operator,and discuss the convergence of iterative sequence by monotone iterative techniques and the quasilinear method.

Abstract:Finding satisfactory jobs is pursued by undergraduates,the university and the whole community,but what is the real picture of the graduate employment? Using the concept of satisfaction index and method of multivariate statistical analysis,this paper analysed the 2010 graduates' satisfaction on their first job based on the investigative statistics.Results showed that the influence facots of employment satsfaction mainly include company environment,individual promotion and income level,and the three factors exert degressive influence on respondents' satisfaction.

Abstract:With the increasing complexity of modern society,the occurrence of serial crimes climbed rapidly,which increased the detection difficulties for the police.Based on the survey data of serial crimes happened in Yorkshire UK,this paper analysed the buffer areas of crime places using software of ArcGIS 9.2,and established a model with Rossmo fomula to reclassify crime places.This research also gives the probable distribution of criminals' residence,and predicts the probable time and place of next crime by using the time sequence.

Abstract:In this paper,an optical feedback system based on fiber linear lasers is presented.The effects of optical feedback could be equivalent to the variation of laser cavity loss,and the output expression of the optical feedback system is deduced.A model is built to analyze the feedback influence on the system.The internal optical feedback effect on fiber linear lasers is similar to self-mixing interference,and the former has same phase sensitivity with the later.The influence from different parameters is analyzed in simulation.The system output is detected in experiment,and the influence of different parameters is also discussed by changing the experimental conditions.The experimental results show a good agreement with the simulated results.The conclusion can be summarized as follows:One fringe shifting of the system output corresponds to a target displacement of λ/2; the different inclination refers to different movement direction; the better sensitivity of optical feedback system can be obtained by choosing appropriate feedback cavity length and target reflectivity.Consequently,this system can be applied to optical survey,such as displacement,distance,velocity measurement,etc.

Abstract:By taking a twin diaphragm box as the sensing component for underwater pressure,a micrometric optical fiber displacement sensor was employed to inspect deformation of diaphragm box with water pressure changing.The signal processing circuit mainly includes signal pre-amplifier,BPF,RMS converting circuit,and 16 Bit MSP430 with ultralow-power consumption.The experimental results indicate that the change of water level from soutis 0 mm to 181 mm can be detected with the resolution of 0.7 mm.The resolution can be improved by increasing the amount of the diaphragm boxes.

Abstract:Based on the analysis of classical adaptive filtering algorithm,an effective speech enhancement algorithm is proposed,which could reduce noise and distortion effectively.According to the auditory masking properties,this algorithm uses masking thresholds of the key frequency segments as dynamic coefficients,to further improve the effect of speech enhancement and estimate error function dynamically.Signals with different SNR are input to simulate this proposed algrithm on Matlab.The high SNR and low residual noise of the output signals show that the algrithm is better than traditional filtering algrithms.

Abstract:Variable-weight optical orthogonal codes(VW-OOC) are put forward to provide differentiated quality of service(QoS) for different users.Due to its non-fixed code weight,the VW-OOC is larger in capacity than constant OOC.In this paper,the definition and the bound on capacity of VW-OOC are given.The method of designing VW-OOC is presented,and the structure results of the proposed codes are given.In the end,the bit error rate(BER) of multi-user interference for different number of code weight is compared through emulation and theoretical analysis.Results show that the BER of larger code weight is smaller while the number of code weight is the same,and the BER of larger number of code weight is smaller while the code weight is the same.

Abstract:In this paper,we investigate ruin problem over the random intervals for the risk model with negatively dependent(ND) claims and constant interest force.Suppose the random time obeys exponential distribution,we analyse the relation between random-time and limited-time,and derive the asymptotic formula for the ruin probability.

Abstract:DEM(Digital Elevation Model) is the digital representation of earth surface,which is used for enormous applications.Generally,DEM is employed without the analyses of its effects of both uncertainty and propagations on specific applications.In this paper,the effects of DEM uncertainty on the selected topographic parameters,such as the slope,upslope contributing area,the topographic index and TOPMODEL hydrological model,are analyzed in terms of the DEM uncertainty propagation.Furthermore,the effects of DEM uncertainty propagation on three topographic parameters are evaluated by using the simulation method of Monte Carlo,and then the effects of DEM uncertainty propagation on TOPMODEL is analyzed in the quantitative and qualitative aspects.This research shows that DEM uncertainty propagation almost certainly affects the slope,upslope contributing area and the topographic index as well.Among all of them,its effect on upslope contributing area is the biggest; while on the topographic index is the smallest.However,the effect of DEM uncertainty propagation on TOPMODEL is trivial and could be ignored in the applications.Further,the reasons can be found that on the one hand,the TOPMODEL is not sensitive to the distribution of topographic index; and on the other hand,the topographic index is affected limitedly by DEM uncertainty propagation.

Abstract:Shadow detection is an important step in the shadow phenomenon,and the total variational model can be used in shadow detection.This paper improves the TV model,and puts forward a shadow detection algorithm based on unconstrained total variation.After the experiments with several real images and statistical analysis,it shows that the unconstrained total variational shadow detection is valid for single iterative images.Total variation model can be used in shadow detection,which is an important step before shadow processing.An unconstrained total variation model is proposed to detect shadow,based on the improvement of variation model.Experiment and statistical analy-sis show that the model can detect shadow of single image under appropriate iteration conditon.

Abstract:The computational stability of nonlinear Schrdinger equation is analyzed by the Hirt heuristic analysis in this study.Using the method,the necessary condition of computational stability of difference schemes about the nonlinear Schrdinger equation is given,which is proved to be practical and effective by four sets of numerical examples.

Abstract:Lightning density and lightning current amplitude are two important parameters in lightning protection.In this article,time-weighted average method is introduced to combine data recorded by conventional method and lightning location system (LLS),Matlab is employed to realize the fitting of lightning current amplitude according to Anderson empirical formula.Results show that in Jiangsu province lightning activities occurred more in the southern regions than northern regions,more in the western regions than eastern regions.Lightning protection should be an important task particularly in regions surrounding Hongze Lake,Taihu Lake and Ningzhen hills; probability distribution of lightning current amplitude fits with Anderson experimental formula,and amplitude mainly distributed in the range from 20 kA to 40 kA.

Abstract:Iron and steel industry is one of the major industries which produce CO₂.Currently,CO₂ emission of the Chinese iron and steel industry accounts for 10% of the whole countries' CO₂ emission,and 35%—40% of big cities' CO₂ emission.The traditional production process of iron and steel consumed too much energy.This paper briefly discusses the bad effects of the greenhouse gas and the source of CO₂ in iron and steel industry.The ways to capture CO₂ in iron and steel industry of China are analyzed.

Abstract:This paper discusses the implementation of MPLS VPN,detailing in its realization modes,components,features,working principle and data forwarding process,and gives the instance of MPLS VPN configuration,finally analyes its security.

Abstract:This paper introduces the idea of ROI (Region of Interest) to moving target detection and tracking research,and proposes the ROI labelling algorithm based on rectangular expansion. The algorithm can label moving targets in binary image quickly and accurately,thus separates moving targets from complex background effectively and improves the efficiency of moving target tracking. Comparison between this ROI labelling algorithm and traditional dynamic clustering algorithm shows that the former can label moving targets with less time complexity and higher efficiency.