结构的

On the basis, we analyze and explain the symmetry of body structure of animals, and think that the symmetry of body structure of animals is determined by the principle of minimum energy.

首先对两个具体的物理系统进行分析，揭示了结构对称与能量最小之间的关系，在此基础上分析和解释了动物体形结构的对称性，并认为动物体形结构的对称性是由最小能量原理决定的。

The invention relates to a microlens configuration having a substantially circular form is constituted of a part of one circle or aspheric curve at any section when a section is taken at a face which is vertical to a major axis or a minor axis of the microlens configuration.

本发明涉及一种具有基本上环形的微型透镜结构，当在垂直于所述微型透镜结构的长轴或短轴的任何一个面取截面时，该结构由在任何截面的圆形的一部分和非球面曲线构成。

A modularized program of plane wave methodis designed to calculate two-dimensional photonic band structures.

并编制了计算二维光子晶体光子带结构的平面波法的模块化计算机程序；研究了方形、三角形复式晶格的光子带结构，发现了三类存在绝对光子带隙的电介质圆柱在空气中排列的光子晶体晶格结构。

In this thesis the dynamic property of viscoelastic damping material was first be explained on the basis of the characteristics of polymer molecular structure. The mathematical models describing the dynamic property of damping material were discussed and the nomogram curve-plotting program of damping property of material was compiled by Visual Basic language.

所以，研究粘弹阻尼结构的动态力学性能，首先要对材料阻尼性能的温度、频率依赖性进行准确的表征，进而才能探讨材料阻尼特性与结构动态力学性能之间的相关关系，以寻求抑制结构振动的内在规律。

Convenient application tools and practicable facilities have been provided for second order nonelastic analysis of multistorey and high-rise lightweight steel frame and design method based upon structural ultimate bearing capacity.

结合本文轻型钢框架的二阶非弹性分析的计算理论和方法及结构极限承载力的设计方法，将遗传算法引入轻型钢框架结构的优化设计中，这为合理地进行轻型钢框架结构工程设计提供了有利的工程指导。

In this paper, in cognizance of the lack of accuracy of the calculation results in the current method of seismic analysis for the frame structures, the paper is searching for a new approach, using continuous models and through the establishment of the partial differential equations to carry on the dynamic analysis of the fiame structures, the limited units will be expanded to the unlimited units, each component as a continuous unit to deal with without the need of further subdivision, making the structure of dynamic behavior closer to the actual behavior and to improve the accuracy of the results.

本文针对当前框架结构抗震分析的动力时程法计算结果不精确的不足，寻求一种采用连续模型并通过建立偏微分方程来对框架结构进行动力分析的新方法，把每个构件作为一个连续单元来处理而不需要再细分，使得结构的动力行为与实际更为接近，从而提高计算结果的精度。

The result shows that, under the condition of the same thickness of material, increasing the number of layers properly can weaken the press, the cutting damage and the destruction due to extension, and lower the impact energy on the construction effectively. In particular, multi-layered protection construction is rather striking in its advantage of destruction-resistance under high stress and low impulse load.

结果表明，分层总厚度相等的条件下，适当增加分层数目可以有效减小冲击载荷对结构的压、剪损伤和拉伸破坏，降低结构所受的冲击能量，尤其对于高强度、持续时间短的脉冲载荷，多分层防护结构的抗毁伤能力优势更为明显。

The output probability distribution of charge carrier multiplier structure from the electron multiplying charge-coupled device and its influence on image uniformity are studied. The probability model is established for the CCM structure of EMCCD. And based on the probability generating function and its properties, the probability distribution function of multiple CCM stages is deduced and its application in improving image uniformity is also discussed.

为了研究电子倍增电荷耦合器件中电荷载流子倍增结构的输出概率分布及其对图像均匀性的影响，建立了EMCCD中CCM结构的概率模型，利用概率生成函数推导了多级CCM倍增结构的输出概率密度函数，讨论了PDF在提高图像均匀性中的应用。

In addition, the two-photon absorption cross section σ non-linearly increased with a ratio of 1∶2.8∶3.7, which is near to the ratio of the square of branching number n2 (1∶2.25∶4), indicating a remarkable cooperative enhancement of σ in the multi-branched pyrazine derivatives.

另外， 从双支到四支结构，双光子吸收截面σ按照1∶2.8∶3.7的比例增加，接近于支链数目的平方之比(1∶2.25∶4)，表明多支结构的双光子吸收存在显著的增强效应，其中四支结构的σ值为1007 GM。

In order to increase the negative refraction bandwidth and the dimension of metamaterials, based on a quadrate structure, a crossing-net metamaterial structure is proposed, and the frequency properties of its permittivity and permeability are simulated.

为拓宽异向介质结构的带宽和维数，在方形环结构的基础上，提出了一种异向介质的交叉网状结构的设计，并对其介电常数和磁导率的频率特性进行了计算机仿真。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。