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In strong magnetic fields, Proton density increases with the increasing of total baryon densities, while neutron number density decreases. 随着总粒子密度的增加质子粒子数密度增加，中子粒子数密度减小。
Diffusion coefficient for neutron number density 中子数密度扩散系数
neutron number density 中子数密度
It is a general practice in drawing diagram of nuclides that the ordinate represents the proton number Z,and the abscissa the neutron number N. 习惯上,核素图以原子序数Z为纵坐标,中子数N为横坐标绘制而成。本文试图以质子数为纵坐标、以核素的中子比值n/A为横坐标绘制核素图,这样绘制的核素图可以更清晰地反映出有关核结构的特性,诸如质子和中子的成对性、核素的奇偶性以及核壳层结构的表现等。
With the cell cycle model, the cell cycle related variables, such as fraction of budding cells (FBC) and cell number density, can be simulated. 通过细胞循环模型，求得与细胞循环过程相关的变量，如细胞带芽分率和细胞数目浓度。
The number density is obtained by transforming the aerosol quality density which is gained directly from Andersen stage sampler. 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。
It indicated that the simulation model was able to well predict both electron number density and ion current density of plume of SPT. 研究表明，所建立的仿真模型能够较好地预测SPT羽流电子数密度和离子电流密度等参数。
When the total baryon number density is about 6 , neutrons and protons almost have the equal proportion, which leads to the symmetric nuclear matter. 当总粒子数密度为左右时中子数密度与质子数密度很接近，使中子星物质几乎成为对称核物质。
The distribution of the void number density has been numerically investigated under the condition of the same ratio of inner and outer diameters for all voids. 假设所有孔洞的内外半径之比相同，用数值方法定性分析了材料在层裂损伤过程中孔洞数密度分布的变化。
This paper introduced the inversion model of nolinear heatflow through the relation betweentheareal track number density of apatite fission track versus time and temperature. 本文应用磷灰石裂变径迹的面积径迹数随时间、温度变化的规律，建立非线性热流的反演模型。
The model of cracked media with crack number density of spatial distribution is presented according to the theory of spectral factorization in stochastic process and Hudson′s model of cracked media. 利用随机过程的谱展开理论以及hudson的裂纹介质模型,构造一种裂纹数密度具有空间统计分布的随机介质模型,给出了详细的理论推导过程。
In high energy neutrino-emulsion collisions, the normalized distribution of two-particle relative pseudorapidity and the correlation between the mean maximum number density of shower particles and multiplicity are investigated. 摘要论述了高能中微子与核乳胶碰撞中，归一化的两粒子相对鹰快度分布，和平均最大簇射粒子数密度与多重数的关联。
Influences of initial damage on development of spalling damage have been indicated by analyzing the distribution of void number density, the cumulative percentage of void volume and the volume fraction of the different-seize voids. 通过分析孔洞数密度分布、孔洞体积累积百分比、不同大小孔洞所占体积份额的计算结果，指出初始损伤对损伤演化有直接影响。
He thumbed through the directory to look for her number. 他翻阅电话号码簿找寻她的号码。
Let me note down your address and telephone number. 让我记下你的地址和电话号码。
void number density distribution 孔洞数密度分布
He picked a winning number on the first draw. 他第一次便抽到一个中奖号码。
The number of fish in coastal waters has decreased. 沿海鱼的数量已减少了。
A proton or a neutron, especially as part of an atomic nucleus. 核子质子或中心，尤指作为原子核的一个组成部分