Balance system of nutrient at the sediment interface in the culture area;

We can divide the geologic reserves of reservoir formation into individual wells,further into well formation and each sedimentary unit.

Based on detailed analysis on sedimentary units of thick oil zones, this paper describes spatial form of single sandbody and boundary relation among different sandbodies through vertically subdividing sedimentary units and structural units and areally subdividing sedimentary microfacies.

Through the contrast between recently drilled wells and old wells, the paper determined a few important guiding beds, reestablished the division and correlation principle for the sedimentary units on the basis of previous recognition, and clarified some confused and wrong ideas.

The glue material between two laminas is modeled by using traction-separation-based interface elements.

An interface element based on the cohesive zone model is employed to simulate the fiber/matrix interface in composite.

The model includes a special interface element, which is used to simulate the thin epoxy adhesive layer of the plate-bonded beam and which allows for the peel failure at the plate cut-off zone and or in the vicinity of flexure and shear cracks.

Based on the idea of interface damage mechanics,a new type of interface elements with three nodes was proposed.

Furthermore,two types of interface elements,spring interface elements and six noded interface elements, which are developed by the present author and can be used to p.

METHODS The paclitaxel(Ptx) poly(ethylene glyeol-lactic-co-glycolic acid)(mPEG-PLGA) nanoparticles were prepared by the interfacial deposition method.