查询词典 absorption coefficient

It is based on the analysis of reflectometric interference spectrum and by this means, optical constants, such as extinction coefficient, refractive index, absorption coefficient and thickness, can be calculated with a high precision.

该方法是一种高精度的测量方法，与透射光谱分析法相比，反射干涉测量方法对于薄膜系统的载体要求较小，可以是透明载体，也可以是非透明基底，可以是金属载体，也可以是光纤端面。

Based on the acoustic absorption theory of microperforated panel and by the means of the theoretical analysis and emulation, the paper focuses on the acoustic characteristic including acoustic impedance, frequency and acoustic absorption coefficient of microperrforated panel working in the combustion chamber which has high temperature and great temperature gradient.

摘要根据微穿孔板吸声理论，采用理论分析和仿真的方法，着重讨论微穿孔板在温度梯度下的声阻抗、共振频率和吸声系数等声学特性，分析其受温度影响变化的机理。

For the multi-layer absorber composed of perforated plate, composed of perforated plate and cavity, composed of perforated plate, porous absorption material and cavity, the absorption coefficient is theoretically calculated.

论文回顾了主动消声、吸声降噪的发展历史与现状，阐述了主动吸声降噪有待解决的关键技术问题，提出了论文的主攻目标和研究内容。

The difference in the absorption coefficient for normal human stomach mucosa/submucosa tissues between 1064 and 532 nm is 53.8%,and the difference in the reduced scattering coefficient for tissue samples between 1064 and 532 nm is 52.2%,and the difference in the optical penetration depth for tissue samples between 1064 and 532 nm is 113%,and the difference in the diffusion constant for tissue samples between 1064 and 532 nm is 110%.

正常人胃黏膜/黏膜下层组织对1064 nm的激光的吸收系数与其对532 nm的激光的吸收系数的差异为53.8%，其对1064 nm的激光的约化散射系数与其对532 nm的激光的约化散射系数的差异为52.2%，其对1064 nm的激光的光学穿透深度与其对532 nm的激光的光学穿透深度的差异为113%，其对1064 nm的激光的漫射系数与其对532 nm的激光的漫射系数的差异为110%。

Assuming that the temperature distribution close to the concrete surface is the quadratic function of the coordinate, the back-analysis equations of thermal conductivity, heat transfer coefficient and absorption coefficient of solar radiation are derived based on one dimension Fourier equation of heat conduction and thermal boundary conditions.

为了选取更接近实际的热工参数，采用试验和反演分析相结合的方法，计算影响日照条件下混凝土结构温度场和温度效应分析结果的热工参数。

Studied the mechanism of interior loss factor of structral subsystems and accoustic subsystems. Studied the composing and methods of calculating interior loss factor of some normal subsystems like beams and plates. And analysised how to get the acoustic subsystem interior loss factor from sound absorption coefficient and air attenuation coefficient while no actural model of vehicle to test.

三、分析结构元件和声场内部损耗因子机理，研究将SEA方法应用到车辆系统时对于一些常见梁板子系统的内部损耗因子的构成和计算方法，以及在没有实际车型无法进行实测时，根据表面吸声系数和空气空间能量衰减常数进行理论计算声腔内损耗因子的方法，并利用SANTANA2000车型的实例进行实测对照。

Fitting analysis with a power function for the pigment concentration and absorption coefficient showed that the absorption coefficients at 412 nm and 440 nm exhibited higher correlation with pheophytin concentration than chlorophyll a, but contrary at 675 nm.

色素浓度与吸收系数进行乘幂函数拟合分析表明，412、440nm波段吸收系数与脱镁叶绿素浓度拟合相关性高于叶绿素a，而675nm波段相反。

The optical characterization methods were used in the study of the defects of transparent crystal in visible light and the near UV absorption topography method is used in the study of the defects and relationship between defect and growth facets because scintillant BGO crystals, when suffered radiation damage,have a high absorption coefficient for light of short wavelength.

除使用通常研究透明晶体的光学方法外，由于BGO晶体在受到光辐照损伤时时短波长光具有高的吸收系数，因此还采用近紫外光吸收形貌法研究晶体缺陷，以及缺陷与晶体小面之间的关系，并根据BGO晶体的结晶习性和小面形成机理提出了减少和消除晶体小面生长及缺陷的方法。

The optical characterization methods were used in the study of the defects of transparent crystal in visible light and the near UV absorption topography method is used in the study of the defects and relationship between defect and growth facet s because scintillant BGO crystals, when suffered radiation damage,have a high absorption coefficient for light of short wavelength.

除使用通常研究透明晶体的光学方法外，由于BGO晶体在受到光辐照损伤时时短波长光具有高的吸收系数，因此还采用近紫外光吸收形貌法研究晶体缺陷，以及缺陷与晶体小面之间的关系，并根据BGO晶体的结晶习性和小面形成机理提出了减少和消除晶体小面生长及缺陷的方法。

Good correlations were found between the computed phytoplankton absorption coefficient and the measured value,with the determination coefficients (r2) being higher than 0.97 and slopes being around 1.0;and the RMSE values could be controlled within 17% over the main absorption wavebands such as 443,490 and 683 nm.

基于这种光谱变化规律本文建立了ap分解模型，并采用2005年同一海区实测数据进行验证，发现模型计算光谱与实测数据有较好的相似性，在主要的吸收波段如443，490和683 nm处的平均相对偏差值在17％以内，两者之间线性关系拟合的决定系数(R2)均在0.97以上，斜率接近于1.0。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。