理论模型

This paper presents a theoretical model for the coefficient of restitution calculation of point impact.

建立了一种计算点接触正碰撞恢复系数的理论模型。

The experimental results show that it is coincident well with the computational simulation of theoretical model.

实验结果表明，该传感器理论模型的数值模拟结果与实验结果是一致的。

Chapter 1 reviews recent investigation in Bose-Einstein condensation, and analyzes critical point and condition of phase transition. Chapter 2 introduces the experiment of Mott insulator and superfluid phase transition in dilute atomic gases, theoretic mode and some studying. In chapter 3, we study the influence of dipole-dipole interaction of two component BEC in optical lattice, by Green function technique and mean-field approach. The results show that long range interaction and dipole-dipole interaction can be strongly influence the phase transition of two component.

本文内容分为四章，第一章对BEC近几年的研究回顾，分析了理想情况下凝聚的临界行为和凝聚条件；第二章我们介绍了光格子中绝缘-超流相变和理论模型及其描述；第三章我们利用格林函数和平均场近似的方法，对偶极-偶极相互作用在光格子中两分量BEC原子的超流-绝缘相变的作用进行了分析，结果表明偶极-偶极相互作用和长程相互作用对绝缘-超流相变有很大的影响。

It is based on the conformal mapping approach and improved transmission line model, which is suitable for direct application in CAD programs.

它是基于保角变换法和改进的传输线理论模型，特别适合于多介质层矩形贴片微带天线的计算机辅助设计及微带阵列天线的分析。

Theoretic simulations are made and compared with the classical conjugate gradient method. Field data applications are performed. It reveals that the proposed algorithm has the advantages of high precision, robustness, fast calculation and practicability.

通过理论模型试算和实际资料处理，并与共轭梯度法进行对比，表明该算法具有精度高、抗病态能力强，运算速度快的优点，具有实用性。

In this paper, a new CRS stack method is proposed as an OIS in a constant velocity medium.

本文基于理论模型数据，实现了输出道成缘方式的CRS叠加方法。

To verify the new approach, an open-ended empty rectangular cavity and cavity loaded with a metal cuboid are analyzed. The numerical results are in agreement with the published data and those obtained by FDTD. Good convergence behavior is observed.

为了验证理论模型的正确性，该文对某一矩形空腔及底部加载金属台阶的腔体进行了分析，计算结果与文献数据以及用时域有限差分法所得结果一致，并具有很好的收敛效果。

Development of droplet evaporation models and application in cryogen spray cooling.

激光治疗葡萄酒色斑的制冷剂喷雾冷却中单液滴蒸发理论模型的比较。

The cooling process involves complex droplet evaporation, strong convective heat and mass transfer, therefore a deep understanding of spray characteristics is essential to optimize the nozzle design and improve the cooling efficiency of the spray. This paper presents a theoretical model to describe the equilibrium evaporation process of a single droplet in cryogen spray.

为了深入了解制冷剂喷雾特性以提高冷却效率、优化喷嘴设计，利用质量传递数法推导传质方程，通过选取合适的阻力系数经验关联式建立了动量方程，考虑液滴蒸发以及与环境气体的对流换热建立了液滴能量方程，初步建立了单个制冷剂液滴平衡蒸发阶段蒸发冷却理论模型。

An "ordering clustering structure" model, which exists in austenitic crystal lattice, has been set up in this paper, and it is considered that alloying would enlarge the structure.

本文提出了奥氏体锰钢晶格点阵中存在"有序簇聚结构"的理论模型，并认为通过合金化能够使这种结构得到强化和扩大。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。