不散射的

The scattering coefficients of a single charged sphere are deduced. And with spherical vector wave functions and addition theorem, the scattering coefficients of multiple charged and uncharged spheres are derived. The sampling method of simulating a Gaussian beam in use of MC is provided.

详细推导了单个带电球粒子的散射系数；并采用矢量波函数展开方法结合矢量波函数的加法定理导出了高斯波束入射多个带电/不带电球粒子的散射系数；提出了用MC模拟高斯波束的抽样方法。

These methods are validated using simulation data, data measured in microwave anechoic chamber and practice measured PolSAR complex imaging data. Unlike the traditional method, these methods can estimate coherent scattering matrices of scattering centers accurately by overleaping the step of scattering center association.

利用仿真数据、暗室测量数据和实测PolSAR复图像数据，验证了这两种方法的有效性，其突出优点是不需要进行散射中心位置及极化的关联，并可以实现相干极化散射矩阵元素的同时估计。

Using the properties of differential cross section is invariant under the rota- tion of total spin,The ambiguity in assigning phase shift of the nueleon-deu tron scattering is discussed.

从氘核与核子的散射截面在自旋转动下的不变性讨论了由散射截面确定相移的非单值性。

The impenetrability of the star cores is known to cause a discontinuity in the osmotic pressure showed through a peak in the scattering functions.

另外，还研究了不同拉伸状态下，不同官能度f的星型高分子链的散射因子，星型高分子"核心"的不可穿透性导致了渗透压的不连续，反应到散射函数曲线上有一个峰值。

After comparing with the thermal conductivity under two different conditions, the thermal conductivity with vacancy is lower than that with Kr, which accounts for phonon scattering on impurities due to lattice strain is stronger than that due to differences in mass between the defect and the surrounding matrix.

模拟结果显示，温度在20~80K之间，考虑热膨胀时的导热系数比晶格常数固定时的值要低，但随温度变化的关系更加接近实验值时的情况；比较固体氩中不同掺杂时导热系数大小，发现同样掺杂浓度条件下，掺空穴时材料导热系数比掺氪时低，说明掺杂时由于晶格不匹配引起的声子散射比不同质量引起的散射更重要。

The measuring mechanism of diffusion nephelometer and methods for its improvement were studied,the result of which shows that the diffusion nephelometer using a new-type monochromatic electronic light source and provided with a luminous intensity stabilizing circuit is featured by high accuracy and sensitivity in case of narrow range of NTU,with good linearity up to 100 NTU,without frequent adjustment of zero point an

探讨散射式浊度仪的测试机理和改进方法。测试结果表明，采用新型单色电子光源和配备发光强度稳定电路的散射式浊度仪具有低浊度范围准确性和灵敏度高，至100NTU线性好，不须经常调整零点和重新标定，耗电量少，光源寿命长和抗色度干扰能力强等特点，适用于水厂提高滤池效果和监测出水水质。

In order to improve the robustness and performance of calibration, several spectra preprocessing methods were employed, including standard normalized variate, multiplicative scatter correction and direct orthogonal signal correction.

为了有效消除土壤颗粒不均匀性所带来的散射影响，同时扣除与土壤品质参数无关的光谱信息，研究运用变量标准化、附加散射校正和直接正交信号校正等光谱预处理方法，使模型精度得到显著提高。

At last,simulation research is carried out on radar echo of two same frequency vibration scatter points.Theoretical annlysis and simulation result indicate that the model is effective and that the periodicity of amplitude modulation function and phase modulation function is invariable as the number of scatter points increased,but,their amplitudes are variational.

最后对两个同频振动散射点合成雷达回波进行了计算机仿真研究，理论分析和仿真结果表明，该模型是有效的，并且随着同频振动散射点数的增加，其幅度调制函数和相位调制函数的周期性不发生变化，只是它们的值会随着振动点数的增加而改变。

The backscattering lights will increase if the laser power increase. The useful signal will be merged in the powerful backscattering lights so that the targer can't be detected and recognized.

随着激光功率的增加，后向散射光也随之增加，有用的信号甚至会被强大的后向散射光所淹没，不能探测和识别目标。

Orthogonal subset is extracted from orthogonal geometry by collecting all traces that have a shot line and a receiver line in common, therefore the two lines are vertical bisectors. An orthogonal subset is single-fold coverage of a 3-D dataset.

在正交子集中，各种规则干扰，如面波、声波、折射以及由地面不均匀体产生的散射，在三维空间上，形成以震源或散射点为顶点的锥形体，线性噪音为从圆锥顶点辐射出的直线，具有恒定的视速度。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷