Then it constructs the flow model within gas reservoirs,flow model within the well bore of horizontal wells and the mathematical model of the optimized length in the horizontal sector.

Analysis of optimum frame length in IEEE 802.11 DCF under error-prone channel and the channel adaptive strategy;

It is demonstrated that when BER is given, there is an optimum frame length which can make the throughput reaches its maximum in both basic access mechanism and RTS/CTS mechanism, and the value of the optimum frame length doesn’t change greatly with the number of the access points.

Through adding resources and environmental constraints to the optimal growth model,this paper builds up a dynamicand time-differentiable model to evaluate the energy resources with sustainability taken into account.

But why? A dynamic programming model of optimal growth with technology progress,where social planner must make the decision to put how much a part of the scientific output as resources for further research,can explain this distribution to some large extent,such as the distribution pattern and the shift to later age of peak research output.