Abstract:The force telepresence telerobot system is a typical human-robot-interaction system with human-in-loop.The human operator as an important unit for the whole teleoperation system is the top control component to perform task of the robot control.The human operator will make a decision and manipulate a telerobot to execute tasks after receives the force feedback,haptic feedback,visual feedback and movement informatio from the sensors installed on the robot.As the human operator is a complex system of multi-input-and-single-output with nonlinear and time varying properties,an appropriate control model needs to be built.This paper analyzes the human operators'characters of perception,decision and movement,then propoeses a control model of human operator and gives an equivalent form of two-port networks,which provides a basis for the force telepresence telerobot system analyzing.

Abstract:Based on the analysis of the characteristics of atmospheric water vapor calculation scheme processed by GAMIT software,the results generated by two kinds of different calculation schemes are comparatively analyzed by using the ground-based GPS data of 6 meteorological stations in Yunnan province.The analysis and accuracy test are conducted by comparison with the radiosonde data.The results show that the two calculation schemes are quite different in the retrieved water vapor results.The precision of GPS water vapor is obviously improved after adopting the local model.The water vapor values derived from GPS are roughly in agreement with the radiosonde observations with a mean-root-square error less than 2mm,and the changing trends of them are basically the same.The study revealed that the retrieved water vapor generated by the ground-based GPS calculation scheme in the local model can be used in research business.

Abstract:As an important meteorological parameter,atmospheric precipitable water exerts great impact on many climatic processes such as the formation of precipitation,the absorption and emission of radiation,even the formation and change of the whole climate.There are several methods available for calculation of atmospheric precipitable water.This paper uses the NCEP reanalysis data to obtain multi-year mean atmospheric precipitable water,and analyses the spatial distribution and seasonal variation of the atmospheric precipitable water in China,then compares the obtained atmospheric precipitable water data with that form sounding data in the same period.The spatial distribution analysis shows that the atmospheric precipitable water is higher in low latitudes than in high latitudes,higher in plain than in plateau,higher in coastal area than in interior area.The atmospheric precipitable water shows an obvious seasonal variation,which is low in winter,and high in summer.The calculation result of atmospheric precipitable water based on NCEP reanalysis data is close to that from sounding data,and the average relative error is less than 19.5%.Thus the proposed method is applicable on estimation of atmospheric precipitable water in China.

Abstract:This paper analyzes the data of 15 acid rain monitoring stations in East China from 1993 to 2004,and the results show that the acid rain disasters were serious in East China,especially in Zhejiang and Fujian province which are in south of the Yangtze River.The precipitation acidity in East China from 1993 to 2004 shows a trend of decrease then increase,while the precipitation is the most important factor affecting the conductivity and pH value.The seasonal precipitation pH value is in descending order from summer,autumn,winter,to spring,but the acid rain frequency does not change obviously with season shift.The precipitation conductivity from the 15 stations is analyzed,and the results show that the conductivity remains stable then fluctuates in big range during the 12 years,and there is a significantly positive correlation between precipitation acidity and conductivity.The monitoring and research on the composition of atmosphere and precipitation acidity should be strengthened in future meteorological work.

Abstract:As the consequence of global warming,China has been affected by extreme weather events more frequently.In recent years,the severe drought events have caused significant economic losses and serious social impact in southwest China,which attracted great attention from the government departments and the scientific community.This research subject is of significant importance and great theoretical value as its findings will reveal the trends and main causes of drought in southwest China,and will provide basis for predicting and establishing early warning system.This paper summarizes the research advances of drought in southwest China,analyzes the characteristics and possible causes of drought,points out the remaining problems with the purpose to provide reference for future research work.

Abstract:Geographic maps are the basis in weather information analysis.However,the limitations in 2D geographic map,such as complexity and distortion in projection,lack in integration,all impose restrictions to the integrated management of multi-scale and multi-resolution meteorological information,which will result in the isolation between meteorological service,meteorological research and meteorological product.Three basic issues in integration of meteorological information in digital earth are put forward,including unity of space benchmark,earth ellipsoid subdivision for spherical integration of weather information,and theory & algorithm for meteorological information transformation from 2D to Earth ellipsoid.Technological approaches towards above issues are also discussed.

Abstract:The temporal and spatial distribution characteristics of lightning activity,including thunderstorm days,regional lightning activity and cloud-to-ground flash frequency,are analyzed based on data of Jiangsu province in 2011.The distribution characteristics and types of lightning disasters are also analyzed.The results are as follows.The peak value of lightning activities in 2011 appeared in August when 11 thunderstorm processes occurred,which were more than in past years,and there were 2 large scale thunderstorm processes in November,which were very rare in previous records.The lightning activities were generally more in the south and less in the north in Jiangsu province,and the high incidence areas of thunderstorm are the south region between the Yangtze River and the Huaihe River and the main region of the middle and east of south Jiangsu province.The lightning disasters occurred mainly between June and August,and the office electronic equipments damage cases were the biggest and the household electronic equipments damage cases were the second types of lightning disaster,and 85% of lightning casualties were in the rural areas.At last,the paper proposes the countermeasures and suggestions for lightning disaster prevention,and provides a reference for the lightning disaster prevention work of Jiangsu province.

Abstract:The complex terrain,vulnerable infrastructure,lagging communication network,all pose restriction on the meteorological monitoring and management in Three-river headwaters region of Qinghai province.Based on technologies of workflow,software metrics and configuration management,we designed an emergency warning and management system for disastrous weather,which is in accordance with the Capability Maturity Model (CMM) standard.The system is aimed to achieve secure and rapid information communication,thus improve the response and management of disastrous weather events.The disastrous weather database is established to electronically and intelligently manage the meteorological disaster information such as flood,drought,typhoon and sandstorm,which is the basis for emergency warning and response.The access to internet provides integrated services of map,text,table,and control for the management system.

Abstract:As a nationally standard fault diagnosis method,the fault tree analysis is easy to implement and has found wide applications,especially in fault diagnosis of large-scale and complicated electronic devices.The basic concepts and mathematical foundations of fault tree analysis are introduced in this paper.The qualitative analysis and quantitative analysis processes,as well as the determination of the minimal cut set significance are elaborated.Then a CINRAD fault is taken as an example to describe the calculation process of fault tree analysis in detail.Through the significance sorting in descending order,the contribution of end event to the occurrence of top event is determined,which is sorted for fault diagnosis.

Abstract:An idea of using interval method to describe the ability parameters of manufacturing resources and manufacturing tasks is put forward.Specific transformation rules are proposed to transform the range form into the value form of ability parameters.Then distance-based objective functions and genetic operators with multi-objective optimization idea are constructed.Non-dominated solutions based on the rapid sorting method produce a set of non-dominated solutions for the user to choose.Finally,a typical example validates the effectiveness of the algorithm.

Abstract:Although the modified constant modulus algorithm(MCMA) can correct the phase rotation,it is bothered by relatively high steady-state mean square error(MSE).In this paper,an improved MCMA blind equalization algorithm which incorporates a stop-and-go technique is proposed.First,a new error control function is obtained by introduction of the local information.Then,the idea of reducing wrong equalizations in stop-and-go algorithm is used to further lower MSE through synchronizing the direction of the new algorithm with MCMA.The simulation results demonstrate that the proposed algorithm not only have the same convergence rate,also lower the inter-symbol interference by 10 dB compared with MCMA.

Abstract:Based on the theory of electromagnetic shielding,modeling simulation is carried out to analyze the shielding effectiveness of electromagnetic shielding body and its influence on coupling efficiency of wireless charging system using electromagnetic field simulation software HFSS.Comparison of field intensity before and after shielding is conducted in a point outside the electromagnetic shielding body to analyze the shielding effectiveness.The magnetic field intensity change in a point inside the receiving coil is simulated,and the influence of shielding on mutual inductance and coupling efficiency is analyzed accordingly.The analysis result indicates that electromagnetic shielding measures will reduce the interference of wireless charging system on outside environment,and enhance the system coupling transmission efficiency.The experiment verifies the simulation analysis.

Abstract:In the signal detection algorithms for multiple input multiple output (MIMO) system,maximum likelihood (ML) detection offers the optimal performance while it encounters difficulties in practical system because of its computational complexity,which is increased exponentially with the number of antennas and modulation order.Minimum mean square error-ordered successive interference cancellation (MMSE-OSIC) algorithm has low complexity,but comparing with the optimal detection,its detection performance has a substantial margin due to error propagation in the progress of iterative detection.For dealing with the above algorithms' shortcoming,a new detection algorithm with low-complexity and near-optimal-performance is proposed.The algorithm makes readjustments of decoding order in MMSE-OSIC algorithm,which begins with the determination of the weakest emission signal layer by comparing the maximum norm of row vectors,then makes exhaustive search on this transmitted signal;on the premise of the correct detection of weakest signal as possible,MMSE-OSIC algorithm is used for the detection of the remaining signal layers.Theoretic analysis and simulation results show that the algorithm can effectively strain error propagation in the progress of iterative detection and nearly reach optimal performance at low computational complexity.An appropriate trade-off between detection performance and computation complexity is obtained by this improved algorithm.

Abstract:The group decision making method based on grey interval preference is investigated.When aggregating the interval preferences of group decision making,the range of interval may be gradually exaggerated with the increase of number of arithmetic computational steps.To avoid this kind of defect,we introduce the definition of adjustment parameter for grey interval.In order to determine the true value of grey interval preference,we develop a quadratic programming method to get the adjustment parameter.We establish a quadratic programming model for objective weight of decision maker,and give the optimal solution of this model.In addition,we construct an optimal model with the adjustment parameter and objective weight combined.We illustrate the feasibility and effectiveness of our proposed methods with numerical example for selecting industries with higher meteorological sensitivity.

Abstract:According to the latest statistical data at Bengbu hydrologic station,a total of 21 floods occurred over Huaihe river basins from 1916 to 2012 and showed an obvious commensurable orderliness.In the guidance of the information forecasting theory of Wen-Bo Weng,with previous research results,combining order analysis with complex network technology,this paper makes a summary on the ordered network structure of the Huaihe floods and supplement of new information,further refinement construction,builds the ordered network structure of commensurability.At last,a new prediction opinion is presented that a big deluge will probably occur over Huaihe basins at Bengbu station around 2013—2014.

Abstract:In order to study the effects of the factors like interest rate on the ruin probability,we consider a discrete time risk model with Markov chain as interest rates.Recursive and integral equations for ruin probability of finite and ultimate time are given,and upper bounds for ruin probability of ultimate time are obtained by inductive and martingale approaches.Numerical simulation shows that upper bounds for inductive and martingale are better than that of Lundberg.

Abstract:Almost difference family is a useful generalization of almost difference set,which was introduced by C.Ding and J.Yin.In this paper,some constructions are stated and then several new infinite classes of almost difference families with k=6,7,8,9 are constructed.