查询词典 marginal density

Relative density is defined as the ratio of the mass density of a substance to that of water under the same conditions of temperature and pressure.

相对密度系指在相同的温度、压力条件下，某物质的密度与水的密度之比。

Part 3 : determination of water absorption, apparent porosity, apparent relative density and bulk density.

第3部分：吸水率、外表孔隙率、外表相对密度和松密度的测量

NBR/modified montmorillonite and NR/HMMT nanocomposites were prepared by the mixing intercalation method with the monomers resorcin and hexamethylenetetramine complex . XRD and TEM showed that the interlayer spacing of HMMT had got much larger with RH addition and the layers of HMMT had dispersed in rubber matrix on nanometers. FTIR and crosslinking density results explained that chemical reaction had occurred between RH and rubber in the course of vulcanization, which improved the crosslinking density of rubber and enhanced the interaction between the rubber and HMMT.

采用单体混炼插层法，引入间苯二酚-六次甲基四胺的络合物，制备了橡胶／改性蒙脱土插层纳米复合材料。X-射线衍射分析表明：RH的加入使蒙脱土层间距不断扩大；TEM观察到无机片层在橡胶基体中纳米级分散；FTIR和交联密度的分析发现，在硫化过程中RH与橡胶发生化学键合反应，同时与改性蒙脱土相互作用，使得体系交联密度提高。

The experiment that is just enunciation, the royal crown eject of water quantity ratio gold bullion many, elucidation royal crown of density ratio gold bullion of the density be small, this certificate the royal crown don't use pure gold manufacturing.

刚才的实验表明，皇冠排出的水量比金块多，说明皇冠的密度比金块的密度小，这就证明皇冠不是用纯金制造的。

The density of states of 17 kinds of RE doped rutile TiO2 is studied using first-principles density functional theory calculation.

稀土掺杂金红石相TiO2的禁带宽度是其吸收波长的主要影响，进而决定其光催化活性。

The intensification phenomenon at 1-meter scale was not found. The larval density in water column might be highly heterogeneous even in very small scale. On the other hand, we consistently found higher settlement density in sand areas than in reef areas. This phenomenon may well have been caused by the intensification

本研究结果在1公尺的空间尺度下并没有发现附苗强化现象，但是礁区的附苗密度却如预期低於砂区，推测可能是1公尺空间尺度内幼生数量过於不均匀，相差5倍的附苗板面积不足以造成幼生附苗密度的变异，而礁区与砂区则由於面积相差相当大因此可以发现附苗强化现象。

The optimal location range of the cavity resonator is dramatically shorten with NCl(a1Δ) self-annihilation. The available power with NCl(a1Δ) self-quenching is much less than that obtained without NCl(a1Δ) self-annihilation at small initial density of HI but has little difference at large initial density of HI.

其中，光腔位置的可选范围大大缩短，在较小的初始HI粒子数密度和适当的输出镜反射率下总输出功率大幅度降低，而随着HI粒子数密度的增加，NCl(a1Δ)自猝灭对总输出功率的影响逐渐减小。

The available power with NCl(a1Δ) self-quenching is much less than that obtained without NCl(a1Δ) self-annihilation at small initial density of HI but has little difference at large initial density of HI.

标 签 激光物理 NCl(a1Δ)自猝灭数值模拟计算功率提取全气相碘激光 laser physics NCl(a1Δ) self-quenching numerical simulation power extraction all-gas phase iodine laser

The types,morphology,number,distribution and density of antennalsensilla in five leafroller moths species,i.e.Ancylis sativa Liu,Aclerisfimbriana Thunberg,Grapholitha molesta,Spilonota lechriaspisMeyrick and Adoxophyes orana Fischer von Roslerstamm,were observedwith microscope and electron microscope.Seven types of sensillum,i.e.sensillum trichodea,sensillum chaetica,sensillum coeloconica,sensillumstyloconica,sensillum squamiformia and Bohm's bristles were present inboth sexes and all five species.The number and density of sesillum trichodeaare much more than other types of sensillum.

用扫描电镜和相差显微镜对枣粘虫Ancylis sativa Liu、黄斑长翅卷蛾Acleris fimbriana Thunberg、梨小食心虫Grapholitha molesta、芽白小卷蛾Spilonota lechriaspis Meyrick、棉褐带卷蛾Adoxophyes orana Fischer von Roslerstamm五种卷叶蛾触角感受器的类型、形态、数量、分布、密度进行了观察，结果发现在所有五种的雌雄成虫触角上都具有七种类型的感受器，它们是毛形感器、刺形感器、腔锥感器(S.coeloconica)、栓锥感器(S.styloconica)、鳞形感器(S.squamiformia)、耳形感器(S.auricillica)和Bohm氏鬃毛(Bohm's bristles)。

Photographic sensitometry, determination of optical density; geometric conditions for reflection density

照相胶片感光度的测定。光密度的测定。反射测量的几何条件

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。