For geodesic triangle in 2 - dimensional constant curvature space , the author improves some geometric inequalities on its interior angle by theory of majorization 摘要对于二维常高斯曲率空间上的测地三角形，研究了其内角的优超关系，并运用优超理论得到了若干新的关于其三内角的几何不等式。
Based on the depth - integrated 2 - dimensional mathematical model , the numerical simulation of the effect of a deep - water navigation channel project on the hydrodynamic flows is presented in this paper 本文基于沿水深积分的平面二维非定常流动数学模型对长江口拦门沙水深水航道工程对长江口水域流场的影响作了细致的数值模拟。
The newly - developed " routine d . c . 2 - dimensional interactive inversion software system " was used to perform computer interpretation of ip and resistivity data from a certain large - size lead - zinc deposit in hebei province 摘要介绍了利用新研制的常规直流电法二维人机联做反演软件系统对河北省某大型铅锌矿的激电和电阻率法资料作计算机解释的结果。
Abstract : the newly - developed “ routine d . c . 2 - dimensional interactiveinversion software system ” was used to per - form computer interpretation of ip and resistivity data from a certain large - size lead - zinc deposit in hebei province 文摘:介绍了利用新研制的常规直流电法二维人机联做反演软件系统对河北省某大型铅锌矿的激电和电阻率法资料作计算机解释的结果。
Nai - heng chang , j . shatah , k . uhlenbeck considered the initial value problem for the 2 - dimensional cylindrical symmetric case in 1999 , they proved that there exists one global smooth solution under the energy small initial condition 1999年changnaiheng 、 jalalshatak和uhlenbeck考虑了它的2 -维柱对称情形的初值问题，在小初始能量条件下，他们证明了它存在一个整体光滑解。
By using the new method of variable separation with addition , semi - analytical solutions of 2 - dimensional ( 2 - d ) steady incompressible viscous gas diffusion flow field are obtained in the paper , and suitable conditions are discussed 摘要运用加法分离变量法，解析求解了二维定常粘性气体不可压缩扩散流场，得到了几组空气流场有源汇和无源汇情况下扩散流场的半解析解，并分析了其适用条件。
( 2 ) as an application of ( 1 ) , in view of the vagueness in the proof of the theorem 2 . 1 : " a continuous flow is uniquely ergodic on 2 - dimensional torus if and only if it has at most one periodic orbit " in [ 2 ] , we give it a proof ( 2 )作为( 1 )的应用，针对[ 2 ]的定理2 . 1 ： “环面上无不动点的连续流是唯一遍历的当且仅当它至多有一条周期轨”证明中所存在的含糊之处，我们给出了它的一个证明。
In order to reveal the mechanisms of extreme radioresistance and dna repair in deinococcus radiodurans , we examined proteome changes in a wild type strain following y - irradiation using 2 - dimensional polyacrylamide gel electrophoresis and silver staining 为了研究耐辐射球菌极强的辐射抗性与dna修复机理，我们应用双向电泳结合银染的方法考察了野生型菌株kd8301在射线照射前后细胞体内总蛋白组的变化情况。
Objective to generate 2 - dimensional ( 2d ) vascular networks by numerical simulation of tumor angiogenesis moving along random directionin order to provide more realistic microvascular networks for the study of hemodynamics , drug delivery and anti - angiogenesis in solid tumors 摘要目的二维数值生成实体肿瘤任意方向生长的血管网，为研究实体肿瘤内血液动力学、药物输运以及抗血管生成提供更趋真实的微血管网络结构。
The solutions of 2 - dimensional theory of elasticity are decomposed by a solution with differential operators . its saint - venant ' s solution and special solution are expressed by ordinary different equations containing one variable z . the relationship is uncovered between the bend the 在板弹性弯曲理论中，分离出了与零特征解对应的圣维南解关于x 、 y方向的偏微分方程，分析了薄板弯曲理论与弹性弯曲理论圣维南解的关系。
