吸收

After comparing the laser intensity absorbed due to the inverse Bremsstrahlung absorption of the plasma with that absorbed due to the Fresnel absorption on the keyhole wall, the different effects of the two energy absorption mechanisms on forming and keeping the keyhole were analyzed.

通过比较小孔内等离子体的反韧致辐射吸收的激光功率密度和小孔孔壁上的多次反射吸收的激光功率密度，分析了两种能量吸收机制在小孔形成和维持过程中所起的不同作用。

In addition, root resorption of deciduous teeth is not continuous, but discontinuous, intermittent stage in the absorption, the absorption of root surface can be deposited new cementum, may also be near the new bone.

另外，乳牙的牙根吸收不是持续不断的，而是间断的，在吸收间歇阶段，被吸收牙根的表面又可以沉积新的牙骨质，附近也可产生新的牙槽骨。

Among the large number of nonlinear absorbers, the material applied most extensively is phthalocyanine reverse saturable absorption compound which is organic large molecule with central symmetry two-dimensional π-electron conjugate system. In the off-resonance condition, its absorption coefficient will raise along with the increasing of incoming light intensity, which shows its reverse saturable absorption properties.

在非线性光学材料中目前最具应用价值的是酞菁类的反饱和吸收材料，这是一类具有中心对称二维π电子共轭体系的有机大分子，在非共振激发条件下，吸收系数往往会随入射光强的增加而增加，体现反饱和吸收。

Spectral element methods for partial differencial equation is introduced in this study from viewpoint of the collocation approximation of Chebyshev polynomial. Wave Equation and its space discretization are deduced. Two time integral methods, central difference method and implicit Newmark method, are introduced, and their stability and applicability are also discussed in some details. The significance of absorbing boundary conditions in spectral element methods for Aeroacoustics is explained, and Clayton-Engquist-Majda absorbing boundary conditions is emphasized and introduced, then the discrete scheme of this boundary conditions is deduced and applied to spectral element methods for wave equation.

本文从Chebyshev多项式逼近理论出发，详细介绍了谱元方法求解偏微分方程的过程；推导了流体中的声波动方程并在空间上对其进行了谱元离散；详细讨论了两种时间积分方法──中心差分法和Newmark方法，分析了它们的稳定性条件，并从理论上对比了两种方法的优缺点和适用范围；将吸收边界条件推广应用于谱元方法求解气动声学问题中，重点介绍了Clayton-Engquist-Majda吸收边界条件的原理和公式，推导了该吸收边界条件的变分形式，并将其引入波动方程的离散形式中。

Using absorbed value feature of known mineral criterion for reference, utilizing Landsat 7 ETM remote images and features of altered mineral spectrum from USGS, valuable alteration mineralization information are extracted by comparison of spectrum similarity.

利用该区域的Landsat7 ETM遥感影像和标准光谱库中的特征蚀变矿物光谱为基本数据，借鉴已知矿物标准中的吸收谷特征，应用光谱特征匹配技术进行吸收谷谱区间和吸收谷深度对比，通过比较两者的相似性，达到提取蚀度矿物的目的，提取出许多有价值的似蚀变带遥感信息。

In pH 3.0 BrittonRobinson buffer solution, brilliant cresyl blue can react with heparin resulting in the decrease of absorbance of BCB at 592 nm.

灿烂甲酚蓝在592nin处有一特征吸收峰，加入肝素钠后，吸收峰强度降低但没有新的吸收峰出现，表明两者能够相互结合形成复合物。

It showed that the propane recovery rate of new process would be 23%~27% higher than that of cryogen refrigeration process at the same refrigeration temperature. To increase the absorption tower pressure appropriately was good to improve the propane recovery rate. However, the choice of pressure must take the pressure of the feed natural gas and product gas into account together. The flow rate of absorbent had great effect on propane recovery rate and tower heat load.

本文实例研究表明：相同制冷温度下，冷剂制冷－油吸收复合工艺的丙烷回收率比原冷剂制冷工艺可提高23%~27%适当提高吸收塔的压力，对增大丙烷回收率有利，但吸收塔压力的确定要综合考虑原料气压力和外输气压力的大小。

When proceeding the research of drug identification by ultraviolet spectrophotometry, this paper adopts the approaches below: to identify Metronidazole Buccal Tablets and Potassium Sodium Dehydroandroan Drographolide Succinate by ulviolet maximum absorbent wavelength; to identify Metronidazole Disodium Phosphate for Injection by ulviolet maximum absorbent wavelength and minimum absorbent wavelength; to identify Ceftriaxone Sodium for Injection and Clarithromycin Tablets by retention time of high performance liquid chromatography- ultraviolet spectrophotometry.

通过测定紫外最大吸收波长λ_(max鉴别甲硝唑口颊片和炎琥宁、测定紫外最大吸收波长λ_(max和最小吸收波长λ_(min鉴别注射用甲硝唑磷酸二钠，结合高效液相色谱(high performance liquid chromatography-ultraviolet detector，HPLC-UV)中保留时间的测定鉴别注射用头孢曲松钠和克拉霉素片，本文建立了药物鉴别的紫外分光光度法。

The edible parts of the vegetables(stems of water dropwort and corms of arrowhead and water chestnut)showed enrichment of 147 Pm with the absorption coefficient,being 1.29±0.28,2.09±0.03 and 1.55±0.55,respectively.

其中，水芹菜随生长时间的延长，吸收147Pm的量明显增加，50、80、110d时全样的吸收系数分别为0.98±0.19、0.92±0.38和1.14±0.18；(2)3种蔬菜的食用器官(水芹菜的主茎，慈姑和荸荠的球茎)对147Pm具有明显的富集性，吸收系数分别为1.29±0.28、2.09±0.03和1.55±0.55。

In chapter 4, we studied the effects of spontaneously induced coherence on absorption properties. Firstly, we gave the definition of electromagnetically induced absorption and introduced theway of obtaining EIA using transfer of coherence and transfer of population.

第四章主要研究了自发辐射诱导相干对原子系统的吸收特性的影响，本章首先给出电磁感应吸收的定义并介绍了一些文献中利用相干转移及几率转移产生电磁感应吸收的理论。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。