一阶

Based on deformation assumption and Mindlin first order shear deformation theory, a finite element method was proposed for free vibration analysis of the composite sandwich plates with debonded damage along the face/core interface.

基于Zig-Zag变形假定和Mindlin一阶剪切理论，提出了具有面板和芯体开裂损伤复合材料夹层板自由振动的有限元分析方法。

In chapter 2, a tangent stiffness matrix formula of four-node C〓 element for the laminated plate is deduced, which is based on the first order shear deformation theory and the Von-Karman nonlinear deformation assumption.

第二章首先给出了在一阶剪切效应和Von-Karman大挠度理论下复合材料层合板的几何关系，然后基于单元域内和边界一致概念，推导了在大变形下"无剪切闭锁"的层合板单元切线刚度阵，并给出了复合材料层合板后屈曲分析的有限元平衡方程。

Considering the interaction between theΓvalley and the folded L valley, we calculated the dependence of theΓvalley of ordered GaInP on pressure using first order perturbation theory.

在考虑有序GaInP中Γ能谷和折叠到Γ点的L能谷相互作用的基础上，用一阶微扰理论计算了有序GaInP直接带隙发光峰峰值能量随压强的变化，计算结果和两个样品的实验结果符合得很好。

Moreover, students should know some basic theories of initial value problem of differential equation, stability theory and first order linear or quasi-linear differential equations.

稳定性理论或一阶线性偏微分方程有所认识。

This theory emerged from those philosophical and logical inquires Russell made in his early stage, when Russell use logical analysis to solve the semantics problem his meaning theory suffered. The foundation of the theory of descriptions is a theory of meaning, as this thesis presents, and its central notion includes two syntax rules. Based on the first order predicates calculus, this theory seems successfully solve some notable semantics problems and then assures Russell's denotation theory.

本文认为，摹状词理论有深刻的哲学渊源，它脱胎于罗素早期的哲学和逻辑研究，直接缘起于罗素想要利用逻辑的分析方法去解决意义指谓论所面临的语义学难题；摹状词理论的基础是它的意义理论，核心是两个句法规则，它基于带等词的一阶谓词演算成功地解决了一些著名的语义学难题，维护了直观的指谓论，从而产生了巨大而深刻的哲学影响。

Both a free volume approach for Helmholtz free energy and a theoretically-based fitted formula for radial distribution function of hard sphere solid were employed to describe the Helmholtz free energy of Lennard-Jones solid in the framework of first order thermodynamic perturbation theory.

结合描述硬球固体Helmholtz自由能的自由体积方法与描述硬球固体径向分布函数的拟合的分析表达式与一阶热力学摄动理论，用于描述Lennard—Jones固体的Helmholtz自由能。

The wind velocity of first order instability is obtained from the dynamic equilibrium relationship between aerodynamic force with dead weight and inertia force of membrane.

根据气动力与薄膜自重和惯性力之间的动力平衡关系获得了薄膜一阶失稳时的临界风速。

As author's conclusion, the vibration of the alying head is a first order non-resonance response of forced vibration.

从而排除了上述两种振动说法，确定了吐丝机的振动属于系统一阶受迫振动非共振响应。

The results show that the responses are decreased with the addition of viscous energy dissipation brace systems, and traveling wave effect is disadvantage to the structure, and pseudo static displacement is decreasing with the increasing of wave velocity. The approximation results by the first-order perturbation modification based on forcing decoupling method are precise.

结果表明，加粘滞耗能支撑后，结构的反应明显减小；行波效应对结构的反应是不利的，且拟静力项的影响随着波速的增加而减小；基于强行解耦的一阶摄动修正法给出的近似解有很好的精度。

A first-order perturbational modification based on the forcing decoupling method is offered for the condition of the large error by the normal forcing decoupling method.

对于常用的强行解耦振型分解法误差较大的情况，推导了强行解耦的一阶摄动修正。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。