查询词典 Green function

Firstly, a generalized spectral dyadic Green's function formulation of multidielectric-layer structures is derived with three dimension sources, which is a set of closed form formulas, and is different from available iterative expressions for two dimension source.

论文从理论和实验上系统地研究了多介质层单频和双频微带天线，推导出新的理论计算公式，提出有效的数值计算方法，研制出新型式的双频微带天线，得。。。

In part one,because there is no long-range order in one-dimensional(1D)system,generalized second-order Green's function theory isused to 1D spin-1 antiferromagnetic spin chain.The Haldane gapin the excitation spectrum appears naturally in the analytical re-sult;When k is zero,there is a gap 2Δ.

第一部分中，在长程序为零的条件下，我们应用推广的二级格林函数理论，讨论了自旋为1的反铁磁一维链，Haldane能隙在解析结果中自然地得出，在k＝0时，能谱中存在一个2Δ能隙，Δ＝0.5J。

Wooded green belt, there is a beach environment enriched by many, and played a sand-fixing function.

林木绿化地带，有丰富的海滩环境很多，起到了固沙的功能。

The result is compared with the result of Green's function method.

并在此基础上利用能谱表达式中被积函数的

The method of Green's function for solving this problem has been introduced in chapter one.

这个方法是严格精确的，它〓较好地解释叉指换能器的实验结果。

In the end, the further improvement of semi-empirical Green's function method is discussed.

同时对经验格林函数法需进一步改进的方向进行了探讨。

Methods to estimate Green's function matrix are presented in detail and relations between these methods are stated.

本文详细推导了声场格林函数矩阵的各种估计方法，统一了各估计方法之间的关系。

Matrix expression of acoustic field and Green's function are introduced in detail.

对声场的简正波形式的矩阵表达式以及声场格林函数矩阵进行了详细介绍。

The computational efficiency and accuracy of the present method have been compared with that of the Green's function method.

计算结果表明，采用该方法可以得到消声器传递损失的高次波效应。

It shows that green cover has obvious function of restraining salt.

说明绿色覆盖具有明显的抑盐作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。