Starting from the experimental lattice parameters,we calculate the electronic structures and the phonon modes with density functional theory,then we evaluate the electron-phonon coupling constants by projecting the first-principles to tight binding model and by finite derivat.
电声子耦合系数是决定有机分子体系电荷传导过程的最重要因素之一,研究电声子耦合对理解有机分子晶体中的本征电荷传输机制有重要的意义。
A model of sound absorption coefficient based on damped harmonic oscillator and its application
基于阻尼谐振子的吸声系数模型及其应用
The sound absorption coefficient of the material was tested by standing wave tube method.
采用驻波管法测试材料的吸声系数。
The effect of thickness and density of the melamine foam on the sound absorption coefficient was analyzed by impedance experiment.
结果表明:材料厚度对其吸声性能的影响较大,密度对吸声性能只在频率400 Hz以下略有影响;三聚氰胺泡沫塑料较纤维材料低频(<1 kHz)吸声系数低,中高频(≥1 kHz)系数高;与聚氨酯泡沫塑料相比,低频(<1 kHz)吸声性能相当,中高频(≥1 kHz)吸声性能较佳。
Automatic gain control technique in microwave noise figure analysis;
微波噪声系数分析中自动增益调整技术
Noise figure measurement within high temperature superconductor mixer;
高温超导混频器噪声系数测量
average sound absorption coefficient
平均吸声系数,平均吸声率
Code for measurement of sound-absorbing coefficient in reverberation room
混响室法吸声系数测量规范
The sound absorption coefficient of the material was tested by standing wave tube method.
采用驻波管法测试材料的吸声系数。
Analysis on the Error of Calculating the Sound Absorption Coefficient Using the Reverberation Chamber Method
混响室法测定吸声系数计算误差分析
Code for measurement of sound-absorbing coefficient and specific acoustic impedance of standing-wave meter
驻波管法吸声系数与声阻抗率测量规范
Use of Corner Microphone for Sound Absorption Measurement in a Reverberation Chamber
混响室中用角点传声器测量材料的吸声系数
A new method to measure the absorption coefficient based on sound pressure shifting
基于声压移相的测量吸声系数的一种新方法
A measurement of the absorption coefficient based on cepstrum analysis
基于倒频谱分析的吸声系数测量的一种新方法
A model of sound absorption coefficient based on damped harmonic oscillator and its application
基于阻尼谐振子的吸声系数模型及其应用
Influence of Specimen Area on Its Absorption Coefficient in Reverberation Room
混响室中不同试件面积对吸声系数的影响研究
Research on Measurement of Sound Absorbtion Coefficient Based on Inverse Filter Principle
基于逆滤波器原理的吸声系数测量研究
When the backing is a double-shell, the water layer causes obvious modulation phenomenon to the absorption coefficient curve.
背衬为双层壳体时，水层对吸声覆盖层的吸声系数曲线有明显的调制现象。
It is concluded from the study that the absorption coefficient depends upon the air voids of asphalt mixture.
发现空隙率尤其是有效空隙率是影响沥青混合料吸声系数的关键因素;
statistical sound power absorption coefficient
统计声功率吸收系数
acoustical transmission coefficient
声透射系数，透声系数
Theoretical Analysis of the Influence of Measurement Parameters on the Measurement Accuracy of Optical Absorption Coefficient with Pulsed Photoacoustic Method
检测参数对脉冲光声法测量绝对吸收系数准确性的影响
Discussion on System of Polyurethane Underwater Anechoic Material and Research Progress in Polyurethane Anechoic Structure
聚氨酯水声吸声材料的体系探讨及其吸声结构的研究进展
The Relationship between Molar Absorption Coefficient & Apparent Molar Absorption Coefficient;
摩尔吸光系数与表观摩尔吸光系数的关系