| 1. | Temperature drop calculation of waxy crude in a buried pipeline after shutdown using enthalpy formulation
采用焓法方程计算埋地管道含蜡原油停输温降 |
| 2. | This model presents the modified nodal approach ( mna ) equations instead of the equivalent circuit of the structure
同时，它以描述系统的改进节点法方程( mna )代替了具体的等效电路。 |
| 3. | Based on the force - method equation , the stiffness matrix and fixed - end nodal displacement and force vector are derived
在力法方程的基础上，给出了组合梁单元的刚度矩阵、杆端位移向量及杆端荷载向量并建立了刚度方程。 |
| 4. | A force - method equation about unknown nodal forces of the composite beams is proposed based on the governing differential equation
在粘结剪力和滑移微分控制方程的基础上，建立了关于组合梁单元杆端未知力的力法方程。 |
| 5. | The characteristics of the normal equation created in recovering the earth gravity model ( egm ) by least - squares ( ls ) adjustment from the in - situ disturbing potential has been discussed in detail
摘要讨论了在基于能量法确定地球重力场模型的过程中，利用最小二乘方法由沿轨扰动位数据解算位系数时法方程的特性，在该问题中，法方程只与卫星轨道有关。 |
| 6. | The nonparallel linear stability of the two - dimensional and three - dimensional disturbance waves are studied by the parabolized stability equation which is developed in recent years and the local method based on the landau expansion
采用近年来新发展的抛物化稳定性方程和利用landau展开式的局部法方程,分别研究二维和三维线性非平行流稳定性问题。 |
| 7. | As we know , there exist some defects in solving normal equation system . in order to overcome the shortcomings , the singular - value decomposition method and its applications in direct solving the ill - conditioning observation equation are studied
最后针对法方程解算方法存在的缺点，主要研究了矩阵的奇异值分解技术在直接解算病态观测方程中的应用。 |
| 8. | In this paper , we introduce in detail some kinds of views how to choose subsoil models correctly and how to determine computation parameters for subsoil models , and we analyze their system with reaction theory and establish balancing matrix equation of pile - raft interaction
在本文中，我们就地基模型和计算参数选择进行了详细的介绍，并用共同作用分析方法对该系统进行了分析，且建立了共同作用的矩阵法方程。 |
| 9. | This paper deals with the solution for 200 000 order normal equations in combined adjustment of astro - geodetic and space networks by using conjugate gradient method , puts forward a scheme of adjusting the coefficients and a strategy of separation as well as mergence between the adjustment and inversion
本文研究了用共轭梯度法解算天文大地网与空间网联合平差中20万阶法方程的有关问题，提出了“系数调整策略”和“平差与求逆既分又合的策略” 。 |
| 10. | Followings are the main study in this paper . 1 ) based on building the condition function of orbit determination of satellite - to - satellite tracking , the coefficient matrix of its normal function was studied . and the relativity of satellite ’ s corresponding orbit elements was analyzed in different cases
本文的主要研究工作如下: 1 )在建立星-星跟踪定轨条件方程的基础上,对其法方程的系数矩阵进行研究,分析了在不同情况下,卫星对应的轨道根数的相关性。 |
