A novel method for planning a staged evacuation

This paper presents an innovative method to facilitate making such a plan.Using an algorithm to schedule the starting time of each evacuation group,the method guarantees that the time of completing a large-scale evacuation is very close to its theoretically shortest evacuation time. Meanwhile,unlike a simultaneous evacuation,during a staged evacuation planned with the proposed method,all evacuees can take the shortest path to a safe exit.Once evacuees start off,they will not suffer any traffic congestion.The above advantages of this innovative method are achieved by using an algorithm with three nested loops.Experiments have been conducted,and their results have validated the proposed method.     

Thermal conductivity model of filled polymer composites

Theoretical and empirical models for predicting the thermal conductivity of polymer composites were summarized since the 1920s. The effects of particle shape, filler amount, dispersion state of fillers, and interfacial thermal barrier on the thermal conductivity of filled polymer composites were investigated, and the agreement of experimental data with theoretical models in literatures was discussed. Silica with high thermal conductivity was chosen to mix with polyvinyl-acetate (EVA) copolymer to prepare SiO₂/EVA co-films. Experimental data of the co-films’ thermal conductivity were compared with some classical theoretical and empirical models. The results show that Agari’s model, the mixed model, and the percolation model can predict well the thermal conductivity of SiO₂/EVA co-films.     

Inspection of pipeline girth welds with ultrasonic phased array technique

A novel automatic ultrasonic system used for the inspection of pipeline girth welds is developed, in which a linear phased array transducer using electronic scan is adopted. Optimal array parameters are determined based on a mathematical model of acoustic field for linear phased army derived from Huygens＇ principle. The testing method and the system structure are introduced. The experimental results show that the phased array transducer system has the same detectability as that of conventional ultrasonic transducer system, but the system architecture can be simplified greatly, and the testing flexibility and the testing speed can be improved greatly.     

Evaluation of plasma sprayed YSZ thermal barrier coating with the CMAS deposits infiltrati on using impedance spectroscopy

The yttria-stabilized zirconi a (YSZ) thermal barri er coatings (TBCs) prepared by atmo-sp heric plasma spraying with different heat treatment period at the temperature of 1250°C were studied in the present investig ation. Electrochemical impedance spectroscopy (EIS) was employed to non-destructively examine the impedance and capaitance behavior of free standi ng YSZ coatings deposited by plasma spray with CMAS (calcium–magnesium–alumino-silicate) infiltration. Equivalent circuit was established on the basis of the biomodal structure in coatings. The sintering behavior of the coatings can be reflected by the changes of resistance and capacitance of the coating . By EIS , the microstructure evolution of the coating with CMAS deposits was discussed in detail.     

A Study on Automatic Scoring for Machine Translation Systems

String similarity measures of edit distance, cosine correlation and Dice coefficient are adopted to e-valuate machine translation results. Experiment shows that the evaluation method distinguishes well be-tween “good“ and “bad“ translations. Another experiment manifests a consistency between human and automatic scorings of 6 general-purpose MT systems. Equational analysis validates the experimental re-suits. Although the data and graphs are very promising, correlation coefficient and significance tests at 0.01 level are made to ensure the reliability of the results. Linear regression is made to map the automatic scoring results to human scorings.     

Bearings-only fusion tracking for maneuvering target with wavelettransform in three dimensional space

1.INTRODUCTION Passivesensordoesnotgenerateelectromagneticwaveand thereforecannotbefoundbyopponent.Thischaracter madeitplayinganimportantroleintargettrackingappli cationwhereradarhastraditionallybeenused.However,forpassivesensor,thedistancebetween sensorandtargetisusuallynotavailable.Tosolvethis problem,twowaysareusuallyadopted:passivesensor withintermittent workingactivesensortracking[1],two ormoreplatformsbearings onlytracking[2,3].Inthis work,bearings onlytrackingwithtwoplatformsisstud…     

Target tracking in glint noise using a MCMC particle filter

1.INTRODUCTION Insomeradarapplications[1～8],themeasurement noiseusuallyderivatesfromtheGaussianassumption.Forexample,complextargetsmightcauseirregular electromagneticwavereflection.Thisphenomenon variesthetargetcenterinaradarandgivesriseto outliersinangletracking,knownas“target glint”[1].Theglintnoisehasalong taileddistribu tionandcanseverelydegradetheKalmanfilterper formance[2～4].Filteringinnon Gaussianenviron mentshasbeenstudiedbymanyresearchers.Masre liez[5]usesascorefunctionbase…     

Decolorization of Anthraquinone dye by Rhodopseudomonas XL—1

Rhodoseudomonas XL-1 gained from textile wastewater can effectively decolorize anthraquinone dye.Under anaerobic condition,93 percent of the anthraquinone dye is decolorized,which is higher than that under aerobic condition.The optimum pH is 6-9 and the optimum temperature is 20-40℃ for the anthraquinone dye decolorization by XL-1,XL-1 can not decolorize the anthraquione dye when it is the sole carbon source.Microbial cometabolism and decolorization of the dye take plasce in the presence of some other carbon source(0.2-0.4g/100ml) called cometabolic substrate.The cometabolic substrate can be peptone,glucose,sodium acetate,beef extract,amylum,etc.The change of molecular structure of the dye before and after decolorized by XL-1 is studied by UV-Vis absorption spectrum.The results indicate that its molecular structure is changed evidently.     

Mixed search algorithm for protein folding

0　IntroductionThedeterminationofthefoldingpathwayfollowedbyaproteinintheconformationalspacefromthedenaturedstatetothenativestructureisstillanunsolvedproblem .Itsdifficultyismainlyduetotheenormousextensionoftheconformationalspaceandtoitsexponentialgrowthwhenthelengthoftheproteinchainincreases.HowaproteinsolvestheLevinthalparadox[1 ] ,i.e.,howitfoldstoitsnativestructurewithoutanexhaustivesearchintheconforma tionalspace,hasbeenlargelydebatedinRef.[2 5 ].Thenatureofthedrivingforcesinducingtheco…     

Sustainable Energy Development Strategy in China

Energy and electrical power is very important in economy and society. China has faced an increasingly serious energy shortage in the past decade. On the other hand, energy consumption and power generation, releasing carbon dioxide and other gaseous emissions from fossil fuels, may pollute the environment. Nuclear power, as an alternative energy source, would reduce these gaseous emissions. Both global wanning and sustainable energy supply can be solved to some extent by the application of nuclear power. In the aspects of regaining economic advantages, environmental protection, the security and reliability of energy, nuclear power has an obvious superiority. In this paper, we present the energy status in quo of China, and discuss ways to realize the sustainable development of energy and power.