1) hash value
散值
2) dispersion threshold
分散阈值
1.
The results showed that the dispersion of TiO_2 on SiO_2 surface could enhance interaction between WO_3 and support,and raised the dispersion threshold of WO_3 on support surface.
应用LRS和TPR技术研究WO3在复合载体TIO2-S iO2表面的分散状态,发现TiO2在S iO2表面的分散可增强WO3与载体之间的相互作用,提高WO3在载体表面的分散阈值。
2.
The obtained ZrO_2/ Al_2O_3 materials are characterized by XRD,DSC-TG and TPD et al investigations,ZrO_2 is dispersed as monolayer on the surface of Al_2O_3 support with the dispersion threshold 0.
经 XRD、DSC-TG、TPD 等测试表明:ZrO_2能单层分散在 Al_2O_3表面,分散阈值为0。
3) dispersion thresholds
分散阈值
1.
were employed in examining the dispersion of the active component on the surface of the carrier,and the relevant dispersion thresholds(i.
XRD,LRS和XPS等技术可用于研究活性组分在载体表面的分散状态,并测得相应的分散阈值。
2.
Furthermore,the relationship between dispersion thresholds and calcination temperature has been investigated,the critical dispersion temperature of KCl and NaCl on the HZSM 5 surface has been found,and th.
本文选择了KCl、NaCl两种盐类,研究了他们在HZSM-5分子筛上的分散阈值,临界分散温度等性质。
4) numerical dispersion
数值弥散
1.
The authors use an operator split upwind equalization scheme for overcoming the numerical dispersion and oscillation problems appeared in water pollution simulations problems where the convection is dominated.
各种常见的数值解法在以对流为主溶质运移问题的求解中都会遇到困难,如用有限单元法或有限差分法时,会产生数值弥散与过量这两类误差。
2.
Then this paper studied the effect of diffusion coefficient on concentration distribution and the conditions of substitution with numerical dispersion for physical diffusion.
本文通过求一对流-扩散方程的半解析解,分析了扩散系数大小及影响扩散系数的参数对计算出的浓度分布的影响;通过将该半解析解与忽略扩散的数值解进行对比分析,讨论了数值弥散代替物理扩散的条件。
3.
Influences of reservoir heterogeneity and dip angle on unstable-state displacement of gas flooding in an oil field have been studied through numerical simulation,adopting dimensionless quantity batch and high-density grid eliminating numerical dispersion techniques,which could identify multiple phase flow patterns.
应用标定多相流态的无因次量组及高密度网格消除数值弥散技术,采用数值模拟方法研究了针对矿场规模的注气驱替中非均质程度、倾角数对非稳态驱替动态的影响。
5) numerical dispersion
数值频散
1.
Analysis of numerical dispersion in wave-field simulation;
波场模拟中的数值频散分析与校正策略
2.
A numerical dispersion relationship is proposed, which is mainly influenced by both the finite difference accuracy and the grid size.
采用适于三维各向同性介质正演的有限差分格式 ,对声波方程进行了差分离散 ,导出了差分格式的数值频散关系。
3.
Conventional finite-difference methods for solving elastic-wave equation suffer from numerical dispersion when too few samples per wavelength are used.
通量校正传输(FCT)算法可有效地压制在粗网格情况下产生的数值频散。
6) dispersion threshold value
分散阈值
1.
The variation of dispersion threshold value is related to the interaction between active component and carrier ,and it is an important experimental parameter in the study of catalyst.
分散阈值的大小与活性组分和载体相互作用有关,是催化剂研究中的一个重要实验参数。
2.
The variation of dispersion threshold value is related to the interaction between active component and carrier,and it is an important experimental parameter in the study of catalyst.
分散阈值的大小与活性组分和载体相互作用有关，是催化剂研究中的一个重要实验参数，分散阈值的测定不仅为单层分散原理广泛的应用奠定了实验基础，亦为催化剂的研制提供一种定量研究手
补充资料：地理阈值
亦称地理临界值。它将地理系统中的不同状态加以分隔与区分，把某一性质的表现范围加以限制和说明。在此种意义上，地理阈值代表了系统的“状态空间”的非连续性。在一般叙述中，常把地理阈值等同于地理系统边界条件，但二者是有区别的：如果两种不同的状态同时存在于相同的边界条件之中时，地理阈值的表现可能是“非传递性”的转移；而当两种不同状态分置于不同的边界条件之中时，地理阈值的表现可能是“过渡性”地转移。无论是非传递性转移的地理阈值，还是过渡性转移的地理阈值，都使地理系统中不可能具备唯一的、通用的或稳定的解。所谓“解”都是有条件的，都是在地理阈值约束下的解。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条