查询词典 sampling fraction

Under proper volume fraction, the neutral nanoparticles may not influence the final morphology and the nanoparticles will localize at the interfaces between two blocks.

中性纳米粒子不会对相分离产生影响，而会集中分布在嵌段共聚物相分离的界面上。

By the means of experiments and numerical simulations, it is verified that speckles can be formed when nanofluids are illuminated by laser beam. First, clear speckles are formed by illuminating static nanofluids containing proper volume fraction of nanoparticles. Then, classic-scattering-model and photon-nanoparticle-collision-model are respectively established based on the wave-particle duality of light. The formation of speckles with nanofluids is simulated respectively on these two models, and the formation mechanism of speckles is figured out.

其中通过静态实验确定激光照射含有合适体积百分比纳米粒子的纳米流体可以形成清晰的散斑图；基于光的波粒二象性，分别根据光的波动性和粒子性建立了"经典散射模型"和"光子——粒子随机碰撞模型"，基于这两个模型分别对激光照射纳米流体形成散斑的过程进行了数值模拟，并对散斑的形成机理进行了解释。

Nanoparticle of an appropriate proportion were homogeneously dispersed in the PI matrix, and the interfacial adhesion between the matrix and the nanoparticle was hence strong owing to the high specific surface area and reactivity of the nanoparticle. Subsequently, the molecular chains of PI attained unchanged or even increased interaction at a proper mass fraction of the nanometer particle, which contributed to improve the wear-resistance of the nanocomposites.

采用PI的原位聚合填充方法，利用聚酰亚胺与无机纳米表面较强的相互作用（如静电作用、较强的范德华力、氢键甚至化学键的形成），用非水悬浮工艺制备了无机纳米/聚酰亚胺纳米复合材料，率先用大型分析仪器全面地表征了复合材料的结构，采用原位聚合填充法制备的聚酰亚胺复合材料中，无机纳米分散状态良好；无机纳米氧化物/聚酰亚胺复合材料的结构表征显示出PI有机相和SiO〓无机相之间形成了键联型复合体系，两相相互影响；在复合体系中，单相本体的结晶结构并未发生改变；在摩擦过程中纳米氧化物没有发生价态的转变；无机纳米氧化物的加入，提高了聚酰亚胺的耐热等级；适量纳米氧化物并不影响复合材料的机械性能， 2。

The resonant peak shifted towards longer wavelength with the increasing volume fraction of methanol,ethanol,propyl alcohol,acetone and formaldehyde with high sensitivities and linear relations.

结果表明，谐振波长随甲醇、乙醇、丙醇等醇类化合物，以及丙酮、甲醛等蒸气体积分数的上升而向长波方向移动，具有高的灵敏度，且两者基本呈线性关系。

Compared with OVX, the ethyl acetate fraction from Psoralea corylifolia L. significantly increased bone mineral density and bone calcium content of rats.

结果表明，给予补骨脂乙酸乙酯萃取物的大鼠与模型组大鼠相比，骨密度、骨钙含量显著增加。

Rna - Rns, see "Partitioning of net radiation", for multiple plants the fraction of radiation to each plant is calculated in the radiation section, see "Partitioning of radiation between plants", es is the vapour pressure at saturation, ea is the actual vapour pressure,ρa is air density, cp is the specific heat of air at constant pressure, Lν is the latent heat of vaporisation,Δ is the slope of saturated vapour pressure versus temperature curve,γ is the psychrometer "constant", rs is an "effective" surface resistance and ra is the aerodynamic resistance.

潜在蒸腾量 Etp 根据Monteith(1965)给出的彭曼联合方程形式计算：式中： Rn 为对于蒸腾的有效净辐射量(也就是 Rna - Rns ，见"净辐射划分"-Partitioning of net radiation，对于多重植被，每一株植物的辐射比率的计算见辐射一节的"植物间的辐射划分"Partitioning of radiation between plants)； es 为饱和水气压；ea 为实际水气压；ρa 为空气密度； cp 为常压下的空气比热；Lν为汽化潜热；Δ为与温度曲线饱和水气压关系曲线斜率；γ为干湿球湿度计"常数"；rs 为"有效"表面阻力；ra 为气动阻力。

Pyroxenite or anortlesite partings a fraction of an inch to 2 feet in thickness and tens of feet to hundreds of feet in length are also present in many seams.

在许多矿层中还见到辉岩或斜长岩夹层，厚几分至2尺，长几十到几百尺。

Methods Using the excellent radioautography technigue, the diffusion, particle size and inhalable fraction of radioactive plutonium aerosols in the accident site were analyzed.

使用优异的放射自显影技术来分析放射性气溶胶在事故现场的扩散和粒径大小，以及可吸入的组分。

By using methods on the theory of majorization, two refinements of an inequality for the rational fraction are established.

利用控制不等式理论给出了一个有理分式不等式的两种加细，并比较了二者的优劣。

Because all the scores are rational, or a fraction of thirteen, or a cycle of festivals, this procedure to solve the problem.

因为所有的分数都是有理数，所以一个分数要么除尽，要么有循环节，这个程序很好地解决了这个问题。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。