permeability distribution meaning in English
渗透率分布
Examples
- But in the course of magnetic field computation the permeability distribution in soft magnetic materials has to be supposed as known and fixed
该程序在磁场计算中只能假设软磁材料中的磁导率都是已知的固定值。 - According to the criteria , natural fracture zones of no . 3 coal seam are divided into four grades and then the permeability distribution of no . 3 coal seam is preestimated
依据该标准将3号煤层天然裂隙划分为4级发育区，进而预测出3号煤层渗透率的分布概况。 - When one tries to calculate the permeability distribution the iteration will lose its convergence . the author finds out the reasons for the divergence by means of theoretical analysis combined with numerical experiments
作者通过理论分析与数值实验相结合的办法找出它计算软磁材料中磁导率分布时迭代发散的原因，并作出相应的改进，解决了非线性磁场计算的问题。 - A series of research achievements about the theory and experiment show that many phenomenons of percolation mechanics in gas and oil reservoir have the property such as permeability distribution , porosity distribution , fractal network distribution in fractal gas and oil reservoir and so on
大量的理论和实验研究表明，油气藏渗流力学中的许多现象都具有尺度不变性，如渗透率分布，孔隙度分布，裂缝油气藏中裂缝网络分布等。 - By successful solution of non - linear magnetic fields and revision of the program , we can reach following conclusions : in the computation of nonlinear magnetic fields , if iteration method is used , under - relaxation is necessary when amending the permeability distribution in soft magnetic materials ; and when < wp = 5 > calculating the equivalent current density in permanent magnets , under - relaxation is not a necessity ; when searching for permeability values by interpolation method on the demagnetization curve of soft magnetic materials , if a fixed saturation point is set , around this point an abrupt change of permeability values will be obtained ; this sudden change may cause a little problem in the smoothness of magnetic field distribution ; because the magnetic circuits of microwave tubes are too complicated , in the author ' s view , to describe the working state of a magnet system , the working points of magnets can not do it properly but average energy production of magnets will serve ; as to indicate the quality of a magnet system design for microwave tubes , the efficiency of magnetic energy utilization will be a very good criterion
由此得出结论，在非线性磁场计算中：采用迭代法的情况下，在各迭代循环之间进行磁导率修正时，一个欠松弛迭代过程是必需的；对永磁体中的等效电流修正时可以不作欠松弛迭代；在纯铁的磁化曲线上指定某一个固定的磁感应强度为磁饱和值，会使得插值求出的磁导率在该磁饱和值附近有一突变,这一突变对计算结果中磁场分布变化的光滑性稍有影响。在微波管磁系统设计中，由于微波管磁路比较复杂，作者认为磁体的工作点并不能很好地反映磁体的工作状态，而采用平均磁能积为衡量磁体工作状态的标准更加符合微波管磁系统的实际情况；要表示磁系统设计好坏的程度，则用磁能利用的效率为标准更好。