Through measuring and analysing the magnetic susceptibility of seashore in quaternary loess south Liaonan,it's revealed that the magnetic susceptibility datas of Malan loess is lower.In the late pleistocene epoch,the climate here was dry and cold,and the sedimentation rate was relatively higher,which affected by the last Glaciation,so it's weak in pedogenesis.When come to Lishi loess which formated in the earlier period,the datas reflect a moist climate with lower sedimentation rate and strong pedogenesis.The fluctuation of loess magnetic susceptibility curve reflected that there had been several paleoclimatic cyclical transformations,and the loess-paleosol sequences indicated that there clearly had been a dry-cold to warm-wet cyclical transformation,meanwhile,corresponding to the winter-summer monsoon cyclical transforming.According to regression equation of the temperature and precipitation based on the magnetic susceptibility datas,the Paleo temperature varies in a range of 5.85 ℃ to 13.0 ℃(+1.5 ℃) and the Paleo precipitation varies in a range of 403.22 mm to 735 mm,which is lower than nowadays level.It's inverting that during the Medio Pleistocene,the late pleistocene epochthe,the paleoclimatic of loess sedimentating in south Liaonan is relatively dry and cold,and undergoing multiple miniature dry-cold to warm-wet alternate transformation.

The technique of powder sputter was developed,and the importance of this technique for fabricating a stable film gas sensor was put forth.The relation between the ratio of impurity in powder and in film,the range of deposition impurity x% for optimum sensitivity with film thickness,the optimum film thickness l* for some thin film,and the rule for response time varies with film thickness were given.