Abstract:With the development of control technology,the scales of the control systems become larger and larger,so does the computational load of the identification algorithms.For nonlinear systems with complex structures,especially for the nonlinear systems that contain the products of the unknown parameters of the nonlinear part and linear part,the sizes of the involved matrices in the over-parameterization model based least squares methods greatly increase,this makes the computational amount of the identification algorithms increase dramatically.Therefore,it is necessary to explore new parameter estimation methods with less computation.For output nonlinear equation-error type systems,this paper discusses the over-parameterization model based recursive least squares type identification algorithms; in order to reduce computational loads and improve the identification accuracy,this paper uses the decomposition technique and the filtering technique and presents the model decomposition based recursive least squares identification methods and the filtering based recursive least squares identification methods.Finally,the computational efficiency,the computational steps and the flowcharts of several typical identification algorithms are discussed.

Abstract:The key aim of this serial articles is to study various stochastic models in finance with emphasise on the Monte Carlo simulations with R for these models.This paper investigates the stochastic Log-linear (SLL) model and obtains the mean payoff of European options.Moreover,this paper discusses how to perform Monte Carlo simulations on the asset price.

Abstract:A thunderstorm forecasting method based on the Wavelet Neural Network optimized by the Improved Genetic Algorithm (IGA-WNN) is put forward in order to improve the accuracy of thunderstorm potential prediction.This method takes use of Cluster Analysis and Newton Iteration Method to improve the convergence direction and precision of multiple population genetic algorithm,thus avoids population homogeneity and local optimum;and employs improved Genetic Algorithm to optimize the initial weights of the threshold of wavelet neural network.The sounding data and lightning location data in Nanjing area from June to August during 2008 and 2009 were used for thunderstorm forecasting,and the convective parameters with higher degree of association,which were selected by grey correlation method,were normalized and put into the proposed model.Independent data are used to verify the forecast result.The forecasting and verification result indicate that,compared to other methods like BP neural network,IGA-WNN achieves higher prediction accuracy,and has better nonlinear processing capability as well as stronger generalization.

Abstract:A comprehensive electricity management system is designed and completed to meet the needs of electricity charge and information management for the user as well as administrator of power supply department.The electricity charge management system is based on the B/S model(Browser/Server),and uses Java as the development language.At the same time,the system adopts the JSP technology and the network database adopts MySQL.This system uses JDBC interface to connect the network database.Tomcat is adopted as WEB tools and MyEclipse6.6 is selected as integrated development environment.The electricity management system can cut the cost and reduce the management pressure for power supply department.

Abstract:A new efficient monitoring system is designed for highway traffic meteorological observation stations.This system is composed of two parts,the real-time meteorological data storage procedure,which is designed and developed by multi-threading,and the modified and reused open-source ZedGraph drawing controls.Backed up with the use of Oracle10g database,the monitoring system integrates the real-time meteorological data storage and data extraction and display.The system realizes the storage and backup of a large volume of meteorological data and provides basis for traffic management and warning decision through its monitoring and display function.Practical application results show that this system is feasible and effective in reducing the impact of meteorological disasters on highway traffic.

Abstract:With the rapid and deep development of space exploration,the existing Earth-based navigation solutions will not be able to meet the increasing precision demand of future spacecraft navigation.Pulsar are rapidly rotating neutron stars that generate pulsed electromagnetic radiation,which provides feasibility of precisely determining spacecraft time and position using X-ray pulsar.A detailed analysis in formation and radiation mechanism of X-ray pulsars is presented.The characteristics of the exiting Earth-based navigation systems,as well as its limitations in deep space exploration,are analyzed,and then the principle of the autonomous celestial-based systems using X-ray pulsar is introduced.This paper gives an overview on the development of pulsar-based navigation and its key technologies including X-ray detector,and gives a preliminary discussion on the radio pulsar navigation.

Abstract:The growth characteristics and purification capacity of wetland plants in different constructed wetlands was studied by simulating different wetland system with six tested wetland plants (Canna indica,Phragmites Australis,Typha angustifolia,Iris pseudacorus L.,Acorus calamus L.and Zizania caduciflora) and two substrates (sand and green sand).Results show that earthworms in the constructed wetland can promote the growth of plants.Compared with plants in sand substrate,plants in treatment of sand plus earthworm or sand plus green sand and earthworms grow better in terms of plant height,leaf length,and plant diameter,especially for plant Canna indica,Iris pseudacorus L.,and Acorus calamus L..The chlorophyll content,measured by term SPAD(Soil and Plant Analyzer Development) is also improved by earthworm.The adding of substrate(sand or green sand) combined with plant and earthworm increases the purification capacity of the simulated wetland,in terms of removal efficiency of COD,TP,NH₄-N,and TN.Sand of mall particle size is beneficial to plant growth as well as nitrogen removal,while green sand with relatively large particle size has higher capacity to remove phosphorus.

Abstract:CO₂ concentrationsretrieved by Greenhouse gases Observing SATellite(GOSAT) are used to study the spatial and temporal distribution of CO₂ in Jiangsu province.The good agreement between the GOSAT data and ground-based measurements in Waliguan and Shangdianzi stations,which is shown in comparative analysis,validates the GOSAT data for CO₂ concentrationsretrieval.The spatial-temporal characteristics of CO₂ concentration by GOSAT data are listed and analyzed for Jiangsu province during June 2009 to May 2011.The volume fraction of CO₂ are at the range of 398×10^-6-400×10^-6 and 393×10^-6-394×10^-6 at 975 hPa and 850 hPa,respectively.The volume fraction of CO₂ changes less in horizontal than in vertical direction.As for seasonal distribution,the maximum and minimum CO₂ concentrations are found in winter and summer,respectively,which can be related to photosynthesis variation in different seasons.As shown by the two years' data,the volume fraction of CO₂ increases by 3×10^-6-5×10^-6 in summer and autumn,and 2×10^-6-4×10^-6 in winter and spring.The diurnal variation of CO₂ concentrationshows peak at 02:00 and troughat 14:00 in Nanjing and Xuzhou station,which may be attributed to vegetation's photosynthesis variation at diurnal level.

Abstract:Based on seasonal and annual precipitation data from 73 meteorological stations during 1961—2009 in Hebei province and its vicinity,the spatial and temporal characteristics of drought are analyzed by the precipitation Z index,empirical orthogonal function and Morlet wavelet analysis method.The results show that uniform drought/flood is the most common pattern for the distribution of seasonal and annual drought in Hebei.The second pattern is a seesaw between southern and northern region,including flood in south with drought in north,and drought in south with flood in north.The emergence of seasonal and annual drought has obvious inter-decadal changes as well as significant inter-annual changes.In the recent 49 years,annual drought index in Hebei presented a downward trend.An abrupt change of annual drought index emerged after 1979 and the climate in the province has entered into dry period since then.

Abstract:Relationship between variation characteristics of frozen soil and the influencing climatic factors were analyzed for the prediction of soil freezing and thrawing in Shijiazhuang.Based on the daily observation data of ground temperature,precipitation,evaporation capacity and frozen soil archived by 5 stations in Shijiazhuang from 1981 to 2010 and methods such as linear trend,multiple regression and complete correlation coefficient,variation relation between characteristics of frozen soil and the influencing climatic factors was analyzed.The results show that,the first freezing date of surface soil had a significant deterring trend while the first thrawing date of surface soil had a significant advancing trend with the middle area having the most significant trend.An obvious positive correlation existed between the average lowest ground temperature during November to December,and the first freezing date of soil surface,while an obvious negative correlation between the average lowest ground temperature during February to March and the first thrawing date of soil surface.Precipitation and evaporation capacity in autumn had weak effect on deterring the first freezing date of soil surface,so is the precipitation and evaporation capacity in winter effect on advancing the first thrawing date of soil surface.

Abstract:Based on the daily NCEP/NCAR reanalysis data,an extraordinary storm occurred in Jiangsu province on June 24—25 of 2011 is analyzed from three aspects:circulation situation,nephogram compared with vapor flux,and change of the water vapor channel.The course can be divided into three stages,the first one is caused by trough,the last by typhoon,and the second one mainly results from the interaction of them.The vapor flux divergence,vertical velocity,divergence and vertical helicity have good indication for the forecasting of the coming 9-12 h rainfall intensity.It is discovered that for this northbound and offshore typhoon (Meari),when vertical helical degree at middle and low layers increases from negative to positive,rainstorm is prone to occur in 12 h;when it decreases greatly,especially changes from positive to negative,the rainfall intensity of the coming 12 h would decrease rapidly,giving about 2 h of advanced time.Analysis of the K index indicates that the precipitation type of June 24 and June 25 respectively belong to convective and systematic one.

Abstract:According to the statistical analysis,a total of 25 M≥8 earthquakes occurred in mainland China and nearby area from 1300 to 2015.The seismic activity of M≥8 earthquakes has showed an obvious self-organized orderliness.It should be remarked especially that,there were three ordered pairs of M≥8 earthquakes occurred in west China during 1902—2001,of which,the time interval in each pair of two earthquakes was four years.This is a unique and rare earthquake example in earthquake history of China and the whole world.In the guidance of the information forecasting theory of WENG Wenbo,based on previous research results,combining ordered analysis with complex network technology,we focus on the summary of the ordered network structure of M≥8 earthquakes,and add new information of three M≥8 earthquakes occurred in Nepal to further optimize network,hence construct the 2D-and 3D-ordered network structure of M≥8 earthquakes and make prediction research.The result shows,the occurrence of Nepal M8.1 earthquake in 2015 indicates the beginning of another M≥8 earthquake cycle.The strong earthquakes are suggested to happen near the Qinghai-Tibet plateau area and gradually shifted from south to north for the next several decades.The futrue ordered pair of M≥8 earthquakes are believed to happen around 2022 and 2026 in west China,as well as the single event around 2029 and 2045.