The theory of stochastic equations and the theory of equivalence of measures previously applied to flows in the boundary layer and in the pipe are considered to calculate the velocity profile of the flat jet.This theo...The theory of stochastic equations and the theory of equivalence of measures previously applied to flows in the boundary layer and in the pipe are considered to calculate the velocity profile of the flat jet.This theory previously made it possible to determine the critical Reynolds number and the critical point for the flow of the plane jet.Here based on these results the analytical dependence for the index of the velocity profile is derived.Velocity profiles are calculated for a laminar-turbulent transition in the jet.This formula reliably reflects an increase of the energy transferred from a deterministic state to a random one with an increase of the index of the velocity profile.Results show satisfactory agreement with the known experimental data for the velocity profile of the flat jet.Using obtained results it is possible to determine the location of technical devices for laminarization of the flow in the jet.This is important both for reducing friction in the flow around aerodynamic vehicles and for maintaining the jet profile if it is necessary to ensure the stability of the flow characteristics.Also the obtained relations can be useful for researching of the processes in combustion chambers,in the case of welding and in other technical devices.展开更多
We give a comparison of two no-arbitrage conditions for the fundamental theorem of asset pricing. The first condition is named as the no free lunch with vanishing risk condition and the second the no good deal conditi...We give a comparison of two no-arbitrage conditions for the fundamental theorem of asset pricing. The first condition is named as the no free lunch with vanishing risk condition and the second the no good deal condition. We aim to derive a relationship between these two conditions.展开更多
In this paper, we build the arbitrage-free term structure model on the inflation rate, and discuss the relations between the arbitrage-free term structure and the equivalent martingale measure. The volatility terms of...In this paper, we build the arbitrage-free term structure model on the inflation rate, and discuss the relations between the arbitrage-free term structure and the equivalent martingale measure. The volatility terms of diffusion processes of the real forward interest rate, the nominal forward interest rate and the inflation index （Jarrow and Yildirim, 2003） are extended into many dimensional Brownian motions. Moreover, as we derive the differential equations of three-factor term structure, our results are generalized. At last, the analytic solutions of European option can be deduced on the inflation rate.展开更多
文摘The theory of stochastic equations and the theory of equivalence of measures previously applied to flows in the boundary layer and in the pipe are considered to calculate the velocity profile of the flat jet.This theory previously made it possible to determine the critical Reynolds number and the critical point for the flow of the plane jet.Here based on these results the analytical dependence for the index of the velocity profile is derived.Velocity profiles are calculated for a laminar-turbulent transition in the jet.This formula reliably reflects an increase of the energy transferred from a deterministic state to a random one with an increase of the index of the velocity profile.Results show satisfactory agreement with the known experimental data for the velocity profile of the flat jet.Using obtained results it is possible to determine the location of technical devices for laminarization of the flow in the jet.This is important both for reducing friction in the flow around aerodynamic vehicles and for maintaining the jet profile if it is necessary to ensure the stability of the flow characteristics.Also the obtained relations can be useful for researching of the processes in combustion chambers,in the case of welding and in other technical devices.
文摘We give a comparison of two no-arbitrage conditions for the fundamental theorem of asset pricing. The first condition is named as the no free lunch with vanishing risk condition and the second the no good deal condition. We aim to derive a relationship between these two conditions.
基金This work is supported by National Natural Science Foundation of China （70372011） and the Youth Teacher Foundation of Beijing University of Chemical Technology （QN0521）
文摘In this paper, we build the arbitrage-free term structure model on the inflation rate, and discuss the relations between the arbitrage-free term structure and the equivalent martingale measure. The volatility terms of diffusion processes of the real forward interest rate, the nominal forward interest rate and the inflation index （Jarrow and Yildirim, 2003） are extended into many dimensional Brownian motions. Moreover, as we derive the differential equations of three-factor term structure, our results are generalized. At last, the analytic solutions of European option can be deduced on the inflation rate.
