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1)  primary beam theory
初等梁理论
1.
In order to analyze the adaptability of primary beam theory on cantilever box girde of sandwich composite materials, the stress of cantilever box girde is analyzed by primary beam theory.
为了分析复合材料初等梁理论计算夹芯复合材料悬臂箱梁正应力的适应性,利用复合材料初等梁理论计算了夹芯复合材料悬臂箱梁的正应力;建立了夹芯复合材料悬臂箱梁有限元模型,得到了夹芯复合材料悬臂箱梁正应力的数值解。
2.
The flexibility which takes shear deformation into account of sandwich composite materials of cantilever box girder is analyzed by primary beam theory.
为了分析剪切变形对夹芯复合材料悬臂箱梁挠度的影响,推导了夹芯复合材料薄壁箱梁的等效弯曲刚度和剪切刚度,将夹芯复合材料悬臂箱梁等效为具有等跨度等刚度的均质箱梁;利用初等梁理论得到了考虑剪切变形的夹芯复合材料悬臂箱梁的挠曲线方程;分析了剪切变形对夹芯复合材料薄壁箱梁挠度的影响,为复合材料薄壁箱梁的设计提供了理论参考。
2)  general beam theory
初等理论
1.
Preciseness of general beam theory in the power calculation of Zhangping Xiyuan Bridge
指出Rayleigh修正解以谐波理论为基础,说明只要杆的横向尺寸远小于波长,横向动能便远小于轴向动能,则杆轴向振动的初等理论就能给出足够好的近似解,通过漳平西元大桥分析了简支板梁桥动力计算中初等的Euler-Bernoulli梁理论的精确性。
3)  elementary catastrophe theory
初等灾变理论
1.
It applied bifurcation approach of elementary catastrophe theory to find out control parameters′ bifurcation values,which decide stability of power systems,further,stability region can be obtained.
它运用初等灾变理论中分岔的概念找出决定电力系统稳定的控制参数的分岔值,从而确定了系统的稳定区域,由稳定区域即可进行系统的稳定判断。
4)  theory of elementary divisors
初等因子理论
5)  Elementary number theory
初等数论
1.
Mathematical thoughtway in elementary number theory;
初等数论中蕴涵的数学思想方法
2.
On the Teaching Practice and Experiece of Elementary Number Theory
初等数论的教学实践与体会
3.
The purpose of the article is to draw attention to the most important problem solving techniques in elementary number theory and their uses are illustrated by some examples and problems.
针对学生在初等数论解题中不易下手这一难点,结合作者多年对数学教育专业初等数论课的讲授经验,提出了一些解题思路并总结了一些解题方
6)  primary physics
初等物理
1.
By the principles of the electric charge conservation, the mass conservation, the energy conservation and the momentum conservation in the nuclear reaction, threshold can be calculated with the methods of primary physics and can be applied to various collision types.
遵循核反应中的电荷守恒、质量守恒、能量守恒、动量守恒,用初等物理的方法也可求解阈能,并适用与各种不同的碰撞类型。
补充资料:初等
1.犹初级。
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