反射

Through numerical calculation and comparison with the complete formula,the accuracy of the approximate formula for calculation of reflection coefficient often used in AVA method for gas hydrate is discussed.

通过与完整公式的对比，对AVA常用的反射系数近似计算式的精度进行了讨论，同时分析了地震波速度、泊松比、密度等参数对于BSR反射系数的不同贡献。

The small concrete blocks and big concrete plate were constructed for the experiment. The dielectric constant and the attenuation index obtained by the first 1 and 1/2 waveforms reflected from the concrete surface are used as the parameters.

研究使用1GHz天线，经由实验分析采用抬高天线与受测物距30cm方式检测混凝土，将测得混凝土反射波形计算出介电常数，并选择反射脉冲波形1又1/2振幅面积来做为量测标的，将火害前后振幅面积计算求得衰减常数，比较火害前后混凝土之差异性。

Methods 16 patients who were diagnosed as myasthenia gravis with initial head and neck symptoms were determined by a pure tone audiometer and acoustic immitance measurement and then the acoustic reflex was reexamined 30 min after injection of Neostigminum sulfate 0.5～1?

对以头颈部和五官症状为首发症状而到我科初诊的16例重症肌无力患者进行纯音测听和声导抗检测，并在肌肉注射甲基硫酸新斯的明0.5～1.0？mg，30？min后复查声反射。检测用0.5、1.0、2.0和4.0？kHz的纯音作同侧和对侧刺激，比较用药前后有无声反射及其阈值、振幅变化、有无衰减等。

Although mix the HD-DVD in CD,the reflectivity of the layer is reduced somewhat, toshiba and Memory-Tech company still the maintenance of plan general is in 14%, can autotype with HD-DVD the reflectivity of CD is identical.

尽管同化光盘中HD-DVD层的反射率有所降低，东芝和Memory-Tech公司仍旧筹算将之保持在14%，和HD-DVD可复写光盘的反射率雷同。

In the inversion of elastic parameter by AVO, the components make different contributions to the inversion.

在利用振幅随偏移距变化进行弹性参数反演中，这些分量对反演所作的贡献是不同的，体现在各反射波的反射系数与弹性参数的信息量及其组合关系的关联程度是不同的。

By using a set of simple formula and calculating method with the rotating of coordinate axis, this paper gives the concrete expression of the reflectance and transmissivity of monopodium with discretional optical axis.

研究了光从各向同性介质入射至单轴晶体界面上时反射和折射情况，采用一套较为简单的公式和计算方法，再加上坐标轴的旋转，从而给出了在晶体光轴取向任意的一般情况下，光在晶体界面上的透射、反射系数的具体表达式。

On the basis of sensitivity analyses using the PROSAIL model, the present study demonstrates an approach that uses a neural network based on image classification incorporated in PROSAIL for accurate retrieval of LAI. By including the soil reflectance index in the original PROSAIL model to take the place of soil background reflectance parameters that are difficult to determine, specific neural networks are constructed corresponding to individual types of vegetation cover.

在PROSAIL模型敏感性分析的基础上提出了一种基于影像分类的神经网络反演方法，引进了土壤反射指数用于替代原模型中难以确定的土壤背景反射参数，分别针对不同植被类型建立各自的神经网络，对经过大气纠正后的Landsat ETM+影像进行了模拟实验并同野外实测LAI数据进行比较。

Improvement of MT migration tomography technology Based on the immanent relationship between tomography purpose and suitable frequency segment selection, we raise an entire frequency segment multi-parameter tomography scheme of MT finite difference migration. We establish a mathematical relationship among apparent electromagnetism reflectance, migration reflectance, background resistivity and the true resistivity distribution. After the introduction of TE/TM mode superpose rate, we carry out the associated resistivity tomography of two polarization mode to adapt the practical data interpolating situation.

大地电磁偏移成像的改进：针对频段选择和成像效果的内在关系，提出全频段、多参数有限差分偏移的解决方案；构建视反射系数、偏移反射系数、背景电阻率与实际电阻率分布的数学关系实现偏移电阻率成像；同时引入TE、TM模式加权因子以实现两个模式的联合偏移电阻率成像，更好的适应解释工作需要。

However, due to the limitation of cholesteric LC materials, the reflective spectrum is narrow band.

然而，由於胆固醇液晶材料的限制，反射频谱通常只有窄频谱的反射，所以此显示器通常只能呈现单一色彩的影像。

In this paper, a kind of omnidirectional reflector in special spectrum band is introduced on the base of λ/4 film system, which is composed of MgF2 / ZnS.

分析了反射带中心波长、边缘波长及带宽对全角度反射器件性能的影响，并对如何避免Brewster角做了定量分析。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。