Ecol-physiological characters including population density and height,leaf length and width,culm lenth,internode length and chlorophyll content of Calamagrostis angustifolia were studied using field survey and controlled experiment for two water regimes.

This paper analyzed the change orderliness of velocity and density following depth of many wells sedimentation lamina at Bohai Sea oil field, and then applied main amplitude and wave impedance parameters assemblage to forecast this oil filed landscape orientation of sedimentation lamina.

Considering the complicated situations such as uncertainly in strata pressure, high abnormal pressure coefficient, strata being easy to collapse, co-existence of well blowout and lost circulation etc, the article analyzes technical difficulties of drilling fluid with super high density, decides prescription of drilling fluid with density of over 2.

To achieve the aim of high cell density cultivation,fed-batch fermentation was applied,companied by chemic neutralization in our experiment.

Dialysis techniques are discussed as a means for effective removal of low-molecular-mass components from fermentation broth to reach high cell density.