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- band gap of elastic wave 弹性波禁带
- Lumped-mass method on calculation of elastic band gaps of one-dimensional phononic crystals 基于集中质量法的一维声子晶体弹性波带隙计算
- Due to quantum confinement effect,band gap of semiconductor nanocrystals(NCs) is dependent on the particle size. 由于量子限域效应,半导体纳米晶的能带宽随粒子大小而改变。
- The photonic band gap of 1-D photonic crystals with graded single refractive index layer is investigated using the method of the characteristic matrix. 摘要利用特征矩阵方法研究了一类周期厚度变化的－维光子晶体的能带特性。
- In this study, we applied the reversibility of elastic wave to a discussion of the reverse time propagation of wave equation. 摘要本文应用波动方程式的可逆性讨论弹性波的逆时影像重建。
- The a-D films have more than 85% sp3 bonding. Density of the films is more than 3 glcm3. Band gap of 2.4 eV is obtained. Hardness is about 30 60 GPa. 其SP~3键的含量超过 85%25，密度超过 3g/cm~3;禁带宽度达2.;4eV，显微硬度达30~60GPa，厚200nm的薄膜表面粗糙度小于1nm。
- The computerized tomography(CT) of elastic wave is a forward problem in the geophysical domain for more than ten years. 弹性波计算机层析成像（CT）技术是十多年来地球物理领域里的一个前沿热门课题。
- By the researched on surface photovoltage spectroscopy(sps), we found the types and band gap of semiconductors, surface state and its position, etc. 通过运用表面光电压技术（SPS），对二联体卟啉的光电性质进行了研究，测定了其半导体类型、表面态及能级位置、表面电荷分布和半导体的能隙带等，为进一步研究该体系的光敏过程和光致电荷转移过程提供了可行性方法。
- We propose an optimization algorithm based on conjugate gradient method to maximize the complete band gap of 2D photonic crystals. 摘要:依据共轭梯度法，我们提出一优化（最佳化）演算法，来优化二维光子晶体的能结构。
- By using the propagating theory of elastic wave the attenuation mechanisms of the elastomer with cylindrical bores is analyzed. 摘要应用弹性波在带圆柱通道橡胶体内传播的理论，分析了穿孔橡胶体的吸声机理。
- The thin-layer method(TLM) is a semi-analytical and semi-numerical approach for the analysis of elastic wave propagation in stratified media. 薄层法是分析和模拟弹性波在层状介质中传播的一种半解析半数值方法。
- Results indicate that the optical band gap of the CN x films is decreased with the increasing nitrogen concentration, accompanied with the reflectance increase of the films. 结果表明：随着薄膜中氮含量的增加，碳氮薄膜的光学禁带宽度减小，红外反射率增加。
- The thin layer method(TLM) is a semi-analytical and semi-numerical approach for the analysis of elastic wave propagation in stratified media. 薄层法是分析和模拟弹性波在层状介质中传播的一种半解析半数值方法。
- The scattering problem of elastic wave by arbitrarily shaped cavities in an infinite anisotropic medium is investigated by the boundary intcgral equation (BIE) method. 本文借助于广义格林公式导出了用位移表示的各向异性介质中SH波入射时的边界积分方程.
- To test the absorbing ability, the reflection coefficient formulas on the absorbing boundaries are derived based on the potential functions theory of elastic wave. 为检验其吸收能力，利用弹性波的势函数理论导出了P波和S波在吸收边界处的反射系数公式。
- Electronic structure analysis shows that the doping S could substantially lower the band gap of TiO_2 by the presence of an impurity state of S3p on the upper edge of valence band. 对TiO_(2-x)S_x的电子结构分析表明，其带隙相对于未掺杂TiO_2有所减小，这是由S3p杂质态在价带上边沿的出现造成的。 可以推断，由S3p杂质态到导带的跃迁造成了实验观测到的S掺杂TiO_2吸收边沿的红移。
- Based on the theory of elastic wave in saturated soils estabblished by the fundamental equaations of Rayleigh wave in a saturated soil ground are derived herem. 基于第一作者提出的饱和土弹性波动方程，本文提出了饱和地基中端利波的频率特征方程，并由此分析了瑞利波传播速度和衰减系数随振动频率、土渗透系数等因素而变化的规律性。
- Spectroscopic ellipsometry indicates that the quantum effect of ZnO quantum dot leads to the fact that the absorption energy of exciton(3.76 eV) is bigger than the band gap of bulk ZnO. SE表征发现ZnO量子点的量子效应导致了ZnO量子点的激子吸收能(3.;76eV)比ZnO体晶的能带隙(3
- By altering the lattice sadius,lattice period and ply,the changes of the band gap of two-dimensional photomic crystals of InP-InGaAsP heterostructure are simulated and the rule of change is analysed. 通过改变二维光子晶体三角形结构的晶格元胞半径、晶格周期和厚度,模拟其带隙变化,分析变化规律,为二维光子晶体集成波导提供理论基础。
- It snapped back like a piece of elastic. 它像一条橡皮带那样迅速弹回。
