Abstract:Control is the core of all scientific issues.Mathematical models are the basis of all control problems.The movement law of things described by equations is the mathematical model.The development of different disciplines is to establish the process of their mathematical models.This paper divides the mathematical models of the linear dynamic systems into three categories:the timeseries models,the equation error type models and the output error type models,and introduces basic mathematical models of linear systems in detail,including the discretization of continuoustime system models and model equivalence transform,singleinput singleoutput stochastic system,multivariable systems,multivariablelike systems,multipleinput and multipleoutput systems such as the main model,submodel and subsubmodel of the transfer function matrix,multipleinput singleoutput systems,and singleinput multipleoutput systems.

Abstract:The difference of the model predictability between front rainstorm in the YangtzeHuaihe River Basin and warmarea rainstorm in South China is investigated through numerical model sensitivity experiments.The control experiments indicate that the rainstorms in the YangtzeHuaihe River Basin and South China can be reproduced by WRF model.The experiments were designed in which perturbations consist of random errors with Gaussian noise were added to the initial conditions,including temperature and wind fields.The result shows that small errors in initial conditions make the simulation results change a lot after 24 h both for front rainstorm in the YangtzeHuaihe River Basin and warmarea rainstorm in South China,but the forecasting error grows faster in south china than in the YangtzeHuaihe River Basin,which lead to the bigger change in simulation results.Furthermore,we found that the dispersion grows with time,and the magnitude of dispersion in south China grows faster than that in the YangtzeHuaihe River Basin.In addition,the model predictability of warmarea rainstorm in South China is less than that in the front rainstorm in the YangtzeHuaihe River Basin.

Abstract:Observation of concentration of pollutants in atmosphere by OPSIS AB DOAS system and Thermo SCIENTIFIC EMS system was performed in rural areas of Nanjing during the winter of 2009 and the spring of 2010.Based on technical characteristics of the two systems,quality control of the observation data and comparison of the two systems were carried.The characteristics of seasonal variations of mass concentration of NO2,O3 and SO2 were analyzed.The comparison of pollution characteristics between urban and rural areas measured by the two different systems during the autumn of 2009 was also carried.Quite good correlation can be established between the observation data of the two systems.The observation data of DOAS system are influenced by water vapor and aerosols in atmosphere,so they are generally higher than that of EMS system,with a rate from 14％ to 25％.The concentration of SO2 and NO2 are higher in winter,while that of O3 is lower,however,quite the reverse is true in spring.There is negative correlation between the curve of NO2 and O3.The concentration of NO2 in urban areas is higher than that in rural areas,and the diurnal variation shows two peaks,while that shows one peak in rural areas.The diurnal variation of O3 shows one peak in both urban and rural areas,but the former has a bigger variation range.The diurnal variation of SO2 shows one peak in urban areas and two peaks in rural areas.

Abstract:As a commonly used method by meteorologists,contour can display the distribution of meteorological elements vividly.A simple but effective automatic drawing method of objective contour for groundbased microwave radiometer data is described in this paper,which is based on the traditional tectangular grid method.This algorithm completes the contour searching from only one side and avoids smoothing,then mark the contour by a convenient method to simplify the drawing process.This automatic drawing and connection of contour is implemented in Delphi70,and two examples are given to verify this algorithm.

Abstract:Many studies indicated that biomass burning exerts important influence on the air quality and human health.This paper reviewed the recent resarch progress of source apportionment of biomass burning and other urban air pollution sources,which is based on the study of organic compounds and organic tracers emitted from biomass burning.Scholars from various countries have presented their research results and progress.Meanwhile,we also summarized several methods to detect the organic matters in particulate samples during the experiment,which is proved to be possible and can be used effectively and simply It could provide useful information for future rearch.

Abstract:Differential optical absorption spectrometry(DOAS) has been widely used for various polluting gas concentration measurement,which influence the measurement precision of the main factor is gas absorption section measurement.This paper using LambertBeer absorption law and the design of my own measuring device measuring the Absorption Cross Section of NO,and used polynomial fitting method to remove the Rayleigh scattering,Mie scattering and molecular absorption,including broadband slowly varying spectrum in the Differential absorption spectrum of NO,improves the accuracy of measurement.Then using leastsquare method inversion gas concentrations.The author inverted gas chroma value of different concentrations NO according to the measured absorption section,and achieved good effect.But this method have not obtained very ideal effect in the low concentrations,therefore,the author next work is to improve the measuring precision of the absorption cross section and inversion precision of the gas absorption cross section.

Abstract:In the paper,the ground nephogram edge detection based on the fusion technique between wavelet package transform and mathematical morphological method was introduced.In the proposed method,the detailed steps of wavelet package transform was presented firstly,the edge should be extracted using the wavelet package transform,and then applied the mathematical morphological method to get the image edge.Finally,the best edge of the image can be achieved by the proposed fusion technique using the edges obtained by the package transform and morphological method respectively.In order to test the performance of the proposed method,the experiment was conducted,some examples were tested and compared simulated by Matlab,it can be seen that the proposed method can get better results than the traditional methods.

Abstract:The paper presents a design of electronic cipher lock based on touch screen,which takes microprocessor LPC2132 of ARM7 as the core component to control the entire system.The paper makes detailed description about the design principle both of hardware and software.The system has some functions:password input,add,clear and display,when password is correct the system is unlock.Alarm when entering wrong password over three times,lock the keyboard and set the initial system when the input password is wrong or the input time is over.This design reduces the fault rate and improves the reliability,security and safety.Combined with touch screen,the electronic cipher lock works effectively and conveniently.

Abstract:This article makes an abstraction of the transportation network in Jiangsu province,a town connecting network model and a bus route network model are both established here.Complex network,graph theory and related tehories used to analyse the topological structure of the two models.By calculating and analysing the static parameters of two models,we can find topological properties of different models;at last,we study the antidestroying ability of two models.We hope it can provide some new references for the road construction and development of Jiangsu province from another angle.

Abstract:The generalization capability is one most important performance of Artificial Neural Network(ANN).This paper discusses several methods on enhancement of ANN generalization capability,and analyzes their advantages and disadvantages.Functions provided by Matlab were employed to approximate the nonlinear function,simulation and fitting with original fuction were carried out to verify the improvement of generalization capability.

Abstract:This paper studies into the encryption principle and several main algorithms in OpenPGP protocol,and presentes the design of JavaMail client based on the OpenPGP protocol,which remedies the security defects of JavaMail.Result shows that the add of OpenPGP protocol into JavaMail can effectively improve the Email confidentiality.

Abstract:In the era that electronic materials based on the silicon \soutis developing to the peak,carbon nanotubes(CNTs) and Graphene nanoribbons(GNRs),which have excellent natures of conductor and semiconductor,will become the mainstream in replacing of silicon microelectronic materials.It is verified that CNTs and GNRs possess some advantages as microelectronic materials by a specification of their structure and electronic natures.The paper also listed several existing achievements and promising methods in the process of constructing microelectronic devices,as well as introduced the methods of preparation of corresponding CNTs and GNRs.

Abstract:In this paper,we investigate the stabilization of the compactly coupled wave equations with variable coefficients and nonlinear dissipative boundary feedback.The energy decay estimates of solutions are obtained by the Riemannian geometry method and the multiplier technique.

Abstract:The paper presents a design of electronic cipher lock based on touch screen,which takes microprocessor LPC2132 of ARM7 as the core component to control the entire system.The paper makes detailed description about the design principle both of hardware and software.The system has some functions:password input,add,clear and display,when password is correct the system is unlock.Alarm when entering wrong password over three times,lock the keyboard and set the initial system when the input password is wrong or the input time is over.This design reduces the fault rate and improves the reliability,security and safety.Combined with touch screen,the electronic cipher lock works effectively and conveniently.