本文采用安德森分级采样直接获得的大气气溶胶质量密度换算成数密度。
The number density is obtained by transforming the aerosol quality density which is gained directly from Andersen stage sampler.
由质量守恒定律，质量密度增量来自未挠动的质量密度的散度和位移矢量场。
According to the law of mass conservation the incremental mass density can be inferred from the divergency of the scalar unperturbed mass density and the vectorial displacement field.
实验和理论显示，对于局域共振声学材料而言，动态质量密度甚至还会变成是负的。
The dynamic mass density can even be negative for the locally resonant sonic materials, as demonstrated both experimentally and theoretically.
用一个具有随机质量密度和截面直径的简支梁的理论结果，验证文中方法的正确性。
It is proved that the method is correct by comparing with the theoretical results of a simply-supported beam with random mass density and section diameter.
粒子的固体输送特性，在啮合段形成的返向漏流速率是依靠螺杆的设计参数和质量密度。
Solid particulate conveying characteristic is given by backwards leakage flow rate through intermeshing region and formulated as a conveying efficiency d.
因此，中微子是否具有静止质量，将极大地影响着宇宙中的质量密度，从而影响着宇宙演化的进程。
Hence, the rest-mass of the neutrino being non-vanishing would influence greatly the mass density and further the evolution of the universe.
根据在郑州进行的冬小麦根系田间实测资料，研究了根长密度和根质量密度在砂壤土中的垂直分布。
Based on the measured data from the winter wheat fields in Zhengzhou of Henan Province, the vertical distribution of root length density(RLD)and root mass density(RMD)were analyzed.
建立了由微小颗粒(无定形的或结晶的)和填充空气或水的小孔构成的模型，在此基础上分析了质量密度与折射率的相关性。
The correlation between mass density and refractive index is analysed on the basis of a model comprising compact grains (i. e., amorphous or crystalline) and pores filled with air or water.
为避免用于计算接触力的罚函数法中的罚因子影响显式仿真算法的稳定性 ，采用了局部质量密度因子来抵消罚因子的负面影响。
To avoid reduction of critical time step size due to the penalty parameter for contact force calculation, a local density factor is introduced.
天文学家们知道冥王星和海王卫一拥有几乎相同的体积、质量和密度。
Astronomers know that Pluto and Triton have nearly the same size, mass, and density.
它几乎与我们自己的行星和体积属性相同，包括质量、密度和大小。
It is nearly identical to our own planet and bulk properties such as mass, density, and size.
森林里的日光质量随着植被密度、太阳照射角度和天空云层数量变化而变化。
The daytime quality of light in forests varies with the density of the vegetation, the angle of the Sun, and the amount of cloud in the sky.
随着野兔密度的增加，这些树枝的数量减少，迫使野兔以低质量的高纤维食物为食。
As hare density increases, the quantity of these twigs decreases, forcing the hares to feed on low-quality high-fiber food.
因此，可以通过密度求一个平面物体的质量。
一个平面物体的密度是每单位面积元的质量。
The density for a flat object would be the mass per unit area.
相似质量的恒星可能在大小上有所不同，因为它们有着不同的密度。
Stars with similar masses might not be similar in size because they have different densities.
由于密度是质量除以体积，相对密度和相对大小给予相对群众。
Since density is mass divided by volume, the relative densities and relative sizes give the relative masses.
但如果，密度可能是变化的，因为它是许多金属的混合物，或者厚度在变化等等，但你仍然可以通过对密度积分得到质量。
But if, actually, it has varying density maybe because it is some metallic thing with various metals or with varying thickness or something then you can still get the mass by integrating the density.
我们知道铁的密度，所以你能算出质量，相信我说的。
We knew the density of steel, and so you can figure out the mass, just take my word for it.
知道了它的大小和质量，并能求出密度，进而可对其成分进行估测。
Knowing both its size and its mass, he wasthen able to calculate its density, and thus make a plausible guess about itscomposition.
假设你被缩小到一枚硬币那么大，你的质量也同比例缩小以保持你的密度不变。
You are shrunk to the height of a nickel and your mass is proportionally reduced so as to maintain your original density. You are then thrown into an empty glass blender.
它大约和木星一样大，但是却是木星质量的20倍，这使它有铅密度的两倍。
It is about the size of Jupiter, but 20 times that planet's mass, making it about twice as dense as lead.
尽管它只占太阳总体积的2%，但其密度可达铅的16倍，并占有差不多一半的太阳质量。
Although it only makes up roughly 2 percent of the sun's volume, it is almost 15 times the density of lead and holds nearly half of the sun's mass.
计算质量可看成二重或三重积分，这取决于空间维数，取决于密度函数，dA还是。
And mass will be double or triple integral, depending on how many dimensions you have, dV of whatever density function you have, dA or dV.
总质量是体积，也就是面积乘以长度乘以密度。
The total mass is the volume, which is the area times the length times rho.
贝尔斯与其同事在上周四三(25日)的《科学》杂志上发表报告指出，这颗钻石行星的质量比木星稍大一些，密度却是木星的20倍。
The measurements suggest the planet has slightly more mass than Jupiter but is 20 times as dense, Bailes and colleagues reported in the journal Science on Thursday.
有些网站需要更高的关键字密度-为非常有竞争力的关键字做网页优化会需要更多的高质量的链接，这才有你在线赚钱的所需流量。
Some sites need higher keyword density -- pages optimized for very competitive keywords may need more quality links to achieve the traffic you need to make money online.
控制组的老鼠表现出比目鱼肌质量和力量下降，胰岛素抵抗上升，骨密度和抗折能力降低。
The control group showed a decrease in soleus muscle mass and strength, the development of insulin resistance, and a loss of bone mineral density and resistance to breakage.
阿尔伯特.爱因斯坦在其广义相对论中对此已有预测，他指出密度极高，质量极大的物体相互靠近到一定程度时就会出现上述现象。
They were predicted by Albert Einstein as part of his theory of general relativity and expected to be generated whenever extremely dense and massive objects get too close to each other.
阿尔伯特.爱因斯坦在其广义相对论中对此已有预测，他指出密度极高，质量极大的物体相互靠近到一定程度时就会出现上述现象。
They were predicted by Albert Einstein as part of his theory of general relativity and expected to be generated whenever extremely dense and massive objects get too close to each other.
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