格林函数

Some methods, in which synthesized theoretical seismogram of high frequency is taken as record signal and 20%random noise is superimposed on the seismogram, are used to analyze the theoretical seismogram. The digital experiment shows that in the correlating frequency range, Green's function method can measure precisely interstation phase velocity, but the results obtained by correlation and narrow band-pass filtering correlation methods are more dispersed.

以合成的高频理论地震图作为记录信号，并在理论地震图上叠加了20％的随机噪声，利用这些方法分析理论信号，数字实验表明：在相干频率范围内，格林函数方法能够精确测量台间相速度，而互相关法和窄带通滤波互相关法所得结果较为离散。

The kinematical finite source is considered as stacking of dynamic point sources based on the dynamic independent principle.

点源格林函数解析解的基础上，根据动力学的独立性原理，把运动的有限尺度破裂源看做是多个动态的点源的叠加。

We present a new method of perturbative expansion in quantum chromodynamics with gluon background fields,which can be used at high,intermediate and low energy scales,and the corresponding Feynman rules are given.

对于具有胶子背景场的量子色动力学，从变分微扰论出发，通过对场作标度变换，把格林函数按一个合适的参数展开，提出了一种既适合于高能区也适合于中低能区的新的微扰展开方法，并给出了相应的费曼规则。

The idea of this method is clarified by taking a vibration problem of simply-supported thin polygonic plate.

以简支多边形薄板的振动问题为例，详细阐明了准格林函数方法的思想。

The idea of this method is clarified by taking vibration problem of simply-supported thin polygonic plate on Winkler foundation.

以Winkler地基上简支多边形薄板振动问题为例，阐明了准格林函数方法的思想。

And then we use 27 pairs of P/SH teleseismic body waves to make tests for our CAPtele method,which shows that the best t_p~*=1,t_~*/t_p~*=5 and length of source time function is 3.5s.

与其相对的，我们还利用环境噪音互相关的方法获取了面波的格林函数。

In part two,thermodynamical Green's function is used to discussthe ferromagnetic behavior of organic ferrromagnets.

第二部分中，我们用热力学格林函数理论研究了有机铁磁体的铁磁行为。我们得出低温自发磁化正比于T3/2和T1/2e-2JZSα/T。

The first principle based on the density functional theory and the nonequilibrium Green's function method are adopted to research the electronic transmission of a zigzag single wall carbon tube with an implanted Li atom.

运用基于第一性原理的密度泛函理论的非平衡格林函数方法对Li原子嵌入后的zigzag型单壁碳纳米管的电子输运性质进行了研究。

A new solution has been obtained for Larson′s model of finite pulse time effects in the flash method for measuring thermal diffusivity by means of Green′s functions.

用格林函数法推导了闪光法测定热扩散率的有限脉冲效应的Larson方程得到了一个与Larson不同的解，对这2个解进行了对比和讨论，指出了Larson的解所存在的问题。

A seismic scattering tomography method based both on the above-mentioned results and the fixed point inversion that is a sort of global optimization method is developed.

在地震波传播及散射理论研究中，我们推出了任意非均匀声学介质中的格林函数，并在此基础上给

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。