1) third order approximation
三级近似
1.
To calculate the beam transport in the ion optical systems accurately, a beam dynamics computer program of the third order approximation has been developed.
粒子轨迹的计算可精确到三级近似。
2.
To understand the nonlinear optical properties of solenoidal lenses,Lie algebraic methods are used in the analysis of particle trajectories in this kind of lenses,and the results of third order approximation are obtained.
用李代数方法分析了带电粒子在螺线管透镜中的运动 ,得到六维相空间中粒子轨迹的三级近似解 ,并包含了运动的相对论效应 。
3.
The solutions of particle trajectories of third order approximation are obtained.
用Lie代数方法分析了带电粒子在四极透镜中的运动 ,得到六维相空间中粒子轨迹的三级近似解 ,并包含了运动的相对论效应。
2) Third-order interaction approximation
三级相互作用近似
1.
This paper adopts the third-order interaction approximation of the rotational isomeric-state model to calculate the bond conformation probabilities of the polymethylene (PM) chain, and compare them with the bond conformation probabilities under the second-order interaction approximation.
本文采用旋转异构态模型的三级相互作用近似,计算了Polymethylene(PM)链键构象的几率,并与二级相互作用近似下键构象的几率作了比较,得到一些新的结果。
2.
In this paper, fourth moment of end-to-end distance of polymethylene chains in the third-order interaction approximation is calculated.
本文用三级相互作用近似理论导出了高分子链末端距的四次矩的计算公式。
3) strong proximate order
强近似级
1.
The essay defined the proximate order and strong proximate order,studied the slowly increasing function and strictly increasing function,deduced the properties of the proximate order and strong proximate order and also studied the existance conditions of the strong proximate order.
在一般意义函数级的基础上定义近似级和强近似级,研究了缓慢增长函数、严格增长函数,推导了近似级和强近似级的相关性质,并研究了一定条件下强近似级存在的条件。
4) More exact
二级近似
1.
The more exact object image refraction image on axial spherical surface is presented, thereafter the lateral magnification and aberration are discussed.
给出了二级近似时近轴球面折射成象的物理规律 ,进而讨论了横向放大率与象
5) zeroth order approximation
零级近似
补充资料：零级近似
分子式：
CAS号：
性质：又称布喇格-威廉姆近似。从分子论角度用似晶格模型推导溶液的热力学函数表达式时报出的一种最简化的近似。在似晶格模型中不计及分子不同放置方式间的能量差异，即又体系的熵和能给予独立的考虑。
CAS号：
性质：又称布喇格-威廉姆近似。从分子论角度用似晶格模型推导溶液的热力学函数表达式时报出的一种最简化的近似。在似晶格模型中不计及分子不同放置方式间的能量差异，即又体系的熵和能给予独立的考虑。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条