three step care

Higher-order asymptotic solutions of a class of boundary value problems for third-order differential equation with a turning point;

一类具有转向点的三阶微分方程的边值问题的解的高阶渐近展开

In this paper the existence of solutions of a class of singularly perturbations of third order boundary value problems with turning points is proved,and the uniformly valid estimates of the solutions are given.

本文证明了一类具有转向点的三阶奇摄动边值问题解的存在性,并给出了解的一致有效估计。

Oscillation of third order nonlinear delay damped difference equations of the form△(β_n△(α_n△y_n))+ p_n△y_n+q_nf(y_(n-(?))=0 is studied.

研究了一类三阶非线性时滞阻尼差分方程△(β_n△(α_n△y_n))+p_n△y_n+q_nf(y_(n-(?))=0的振动性,得到了一些新的能够保证这个方程的解振动或收敛于零的充分条件。

Research of CNC Gear-hobbing Technology on Three Order Ellipse Helical Gear;

三阶椭圆斜齿轮数控滚切加工的研究

According to the operation and development of radiation therapy in the world,in order to further promote the radiation therapy of tumour in China,a design of a special synchrotron with two super-periodicity for hadron therapy is presented,including lattice,injection system,RF acceleration and slow extraction of the third order resonance.

根据国际放射疗法的现状和发展,为了进一步提升国内的肿瘤放射疗法,研究设计了1台由两个完全相同的超周期组成的治癌专用离子同步加速器,包括LATTICE、多圈注入系统、RF加速及三阶共振慢引出系统。