Neutron transport in a reactor system with temperature feedback

When the effect of temperature feedback in a reactor system is considered the neutron transport equation for the neutron density is supplemented by a temperature equation which is a partial differential equation of parabolic type if heat conduction is taken into consideration. This consideration leads to a coupled system of nonlinear partial integro-differential equations. The aim of this paper is to present an iterative scheme for the determination of the solution of the nonlinear coupled system and to establish some qualitative property of the solution. The iterative scheme consists of two monotone sequences which converge monotonically from above and below, respectively, to a unique solution. The qualitative aspect includes the existence and uniqueness of a positive solution, upper and lower bounds of the solution and stability of a steady-state solution.     

n阶非线性微分方程三点线性边值问题解的存在唯一性

讨论了ｎ阶非线性微分方程ｙ＾（ｎ）＝ｆ（ｔ,ｙ‘,…,…,ｙ＾（ｎ－１）满足边界条件ｙ＾（ｎ－３）（α）＋λαｙ＾（ｎ－２）（α）＝λ１,ｙ＾（ｎ－１）（β）＝λｎ－１,ｙ＾（ｎ－３）（４）＋λｎｙ＾（ｎ－２）（ｒ）＝λｎ＋１,或ｙ＾（ｎ－２（α）＋λαｙ＾（ｎ－１）（α）＝λ１,ｙ＾ｊ）（β）＝γｊ＋２（ｊ＝０,１,…,ｎ－３）,ｙ＾（ｎ－２）（４）＋λｎｙ＾（ｎ－１）（４）＝λｎ＋１的三点问题     

n阶非线性微分方程边值问题解的存在唯一性

讨论了ｎ阶非线性微分方程ｙ（ｎ）＝ｆ（ｔ,ｙ,ｙ′,…,ｙ（ｎ－１）满足边界条件ｙ（ｎ－３）（α）＋λ０ｙ（ｎ－２）（α）＝λ１,ｙ（ｎ－１）（β）＝λｎ－１,ｙ（γ）＝λｎ,ｎ≥３,ｙ（ｊ）（β）＝λｊ＋２（ｊ＝０,１,…,ｎ－４）,ｎ＞３或ｙ（ｎ－２）（α）＋λ０ｙ（ｎ－１）（α）＝λ１,ｙ（ｊ）（β）＝λｊ＋２（ｊ＝０,１,…,ｎ－３）,ｙ（γ）＝λｎ的边值问题解的存在唯一性,其中α,β,γ及λｉ（ｉ＝０,１,…,ｎ）均为实数。通篇假设函数ｆ（ｔ,ｙ１,ｙ２,…,ｙｎ）是区域［α,γ］×Ｒｎ上的连续函数。