There are so many different operation targets in modern wars.From the view of target value,the importance of target is evaluated,and the model of analysis on target value is constructed based on Bayesian networks.Considering the relations in targets attributes,the complete undirected Graph Augmented Bayes has been used.This model may be a scientific way for commander to choose target.

In order to research the thermal conductivity of the air-entraining concrete,influencing factors such as aggregate content,sand ratio,fly ash content and air content on thermal conductivity of air-entraining concrete are quantitatively investigated by DRH-that is,a conductivity Apparatus of Guarded-Hot-Plate.The experimental results show that water-cement ratio and air content are the main factors of thermal conductivity of the air-entraining concrete.In addition,aggregate content,sand ratio,and fly ash content also does have an effect on the thermal conductivity to an extent.

For the defect of concrete pavement plate being empty,the use of acceleration sensor collecting data in various states(plate angle separation,plate angle of non-void) and different thickness of the concrete slabs.through analyzed by spectral analysis,it shows that a thickness of 20 cm,18 cm's Void concrete slab,the maximum amplitude of the corresponding frequency is from 200 Hz to 400 Hz,when the testing points are arranged in the region of the corner of concrete slabs.On the contrary,testing point arrangement in the area of non-void,the maximum amplitude of the corresponding frequency is from 500 Hz to 700 Hz.Thickness of 20 cm,18 cm,ordinary concrete slab,the maximum amplitude of the corresponding frequency is in the 500~800 Hz.There is a certain relationship between the frequency and void thickness of the plate and test point arrangement.This method provides an effective experiment basis for acoustic vibration judging rigid pavement in void and nondestructive testing technology.

Rockburst is a worldwide geological disaster and a great threat to the safety of mining constructors and facilities.A lot of research works have been done on rockburst at home and abroad.But because rockburst is very complicated,there are no good theories and methods.In this paper,the research status on definition,mechanism,prediction and control of rockburst is analyzed and commented.And some new opinions are proposed in several aspects.

Linglong Gold Mine is in the high in-situ stress area.Rock mass is stiff and brittle granite.The Mine is a deep well mine now.The mining depth is more than 1000m and will exceed 1000m in the future.Rock burst will be a serious problem for the Mine during deep mining excavation.So the predication and prevention of rock burst play an important role in the control of deep ground pressure for the Mine.Based on the investigation,SEM,indoor rock mechanics experimentation,CSIR and measurement of in-situ stress,the author analyzed the mechanism of rock burst during deep mining excavation in the Mine and advanced prevention methods.