我们建立了一套描述聚丁二炔晶体中的三阶非线性光学过程的数学公式。
We derived a set of mathematical formulas for describing the third-order nonlinear optical process in polydiacetylene crystals.
令X射线穿过晶体：我们使用一个数学模型根据通过它们时产生的衍射来测量和观察蛋白质结构。
Sending X-rays through the crystal: Depending on how they diffract , a mathematical model is used to determine and observe the protein's structure.
从激子模型出发，建立了一套描述聚丁二炔晶体中的三阶非线性光学过程的数学公式；
Starting from excitonic model, we derived a set of mathematical formulas for describing the third - order nonlinear optical process in polydiacetylene crystals.
而本论文重点论述的是配位形集这种新的晶体空间数学划分形式。
In this dissertation, we would make a detailed discussion about a new mathematical form of crystal space classification: coordination shape set.
基于正统单电子理论，提出了单电子晶体管的I - V特性数学算法改进模型。
A mathematical model of the I-V characteristics of single-electron transistors (SET's) is improved based on the orthodox single-electron theory.
差值结构是为了便于用直接法求解含重原子晶体结构而引进的一种经过数学加工的结构。
Difference structures are structures subjected to certain mathematical processing, they are introduced for the convenience of solving heavy-atom-containing structures by direct methods.
简立方晶体中的计算对晶体作了各向同性近似，虽然各向同性数学计算简单，并且可以得到一些有用的结果，但得到的结果仅仅数值表达式，不能反映其物理本质。
The approximation of isotropy was considered in simple cubic which makes the mathematics be simple, but the result is only described by number which doesn't reflect essence in physic.
本文根据晶体管非线性元件的特点，利用数学推导方法，从基础上分析了变频工作啸叫的原因，并提出了消除方法。
Based on the speciality of transistors non-linearity, using maths method, this article analyses the cause of whistle of frequency conversion circuit and provides method to eliminate.
本文根据晶体管非线性元件的特点，利用数学推导方法，从基础上分析了变频工作啸叫的原因，并提出了消除方法。
Based on the speciality of transistors non-linearity, using maths method, this article analyses the cause of whistle of frequency conversion circuit and provides method to eliminate.
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