迭代计算

We presents an accurate F method based on corresponding point adjustment.The method adjusts coresponding points according to the fixedness of projective transformed cross ratio,then calculates F matrix accurately through linear and non-linear methods. When computing intrinsic parameter,A matrix,we simplify the step,and stress on the two important parameters of A.The result will be getten through solving Kruppa equation based on SVD decomposition.In order to compute extrinsic parameters,we use linear method to get initial R and t,then apply non-linear method to accurate them.

提出了基于匹配点调整的F求精方法，先根据摄影交比不见性对手工选择的匹配点进行调整，再用线性、非线性结合的方法求精F矩阵；在计算内部参数A中，进行了一定的简化，把重心放在A中重要的两个参数上，用SVD分解法计算Kruppa方程；在计算外部参数时，首先用线性法求解R、t，然后再用非线性法迭代求精。

In the self - calibration scheme , the thesis emphasizes the accuracy of camera intrinsic and extrinsic parameters . we presents an accurate f method based on corresponding point adjustment . the method adjusts coresponding points according to the fixedness of projective transformed cross ratio , then calculates f matrix accurately through linear and non - linear methods . when computing intrinsic parameter , a matrix , we simplify the step , and stress on the two important parameters of a . the result will be getten through solving kruppa equation based on svd decomposition . in order to compute extrinsic parameters , we use linear method to get initial r and t , then apply non - linear method to accurate them

提出了基于匹配点调整的f求精方法，先根据摄影交比不见性对手工选择的匹配点进行调整，再用线性、非线性结合的方法求精f矩阵；在计算内部参数a中，进行了一定的简化，把重心放在a中重要的两个参数上，用svd分解法计算kruppa方程；在计算外部参数时，首先用线性法求解r、 t ，然后再用非线性法迭代求精。

First low order approximation of generating function and approximate optimal trajectory were obtained. Then using low order approximation of generating function of Hamilton "relative motion" to the approximate optimal trajectory, improvement of the approximate optimal trajectory was iteratively made. In this way, high order approximation accuracy can be obtained by only using low order approximation, which is much cost effective in computing.

首先以较低的计算代价，获得最优控制Hamilton系统生成函数的低阶近似，得到一条近似的最优轨线，然后将最优控制Hamilton系统相对于近似最优轨线求"相对运动"，该"相对运动"仍具有Hamilton性质，利用这一"相对运动"的生成函数低阶近似，可以对近似最优轨线进行迭代修正，从而以计算代价较小的低阶近似逼近计算代价高得多的高阶近似的精度。

Depending on the required reactive optimal control ask for power flow, this inquiry method is used in alternate iterating algorithm to calculate flow. By this method, there is not special need to deal numbering nodes of line, and there is not effect to program if add or reduce number of nodes.

针对配电网无功优化控制对潮流计算的要求，将上述这种节点链表查询法运用到交替迭代潮流计算方法中来，这种经过节点链表查询的潮流计算方法不需要进行特殊的线路编号，而且任意增减节点数对程序没有影响。

Based on the vehicle-bridge interaction model, a new decoupling ineration method for solving dynamic equation has been developed. This method is so powerful for saving computer time that the simulation calculation for whole train crossing long-span bridge can be completed with both mini-computer and micro-computer.

根据所建立的车桥相互作用模型，提出了一个新的车桥动力方程迭代去耦解法，可以比原有方法大大节省计算机时，从而使得在小型计算机或微型计算机上实现整列车通过大跨度桥梁的全过程的仿真计算成为可能。

Methods for calculating the optimal solution of the minimum time attitude slewing motion and the energy-optimal problems were obtained using Genetic Algorithm, which does not need initial guesses and increases the calculational efficiency.

同时，将遗传算法引入卫星姿态控制的数值计算中，求解最短时间控制问题和能量最优控制问题，发展了一种新的最优控制问题的计算方法，避免了对迭代初值进行猜测的困难，提高了计算效率。

First by testing the practical multilayer insulation in a cryogenic tanker, which is the carilometer in my paper,some affecting factors on multilayer insulation are analysed, then by using the low-temperature and vacuum environment caused by multilayer insulation, the effective thermal conductivity of multiple fiber paper with 5 layers is tested.Through Newton interativemethod,an empirical formula is deduced to computer the thermal conductivity of fiber paper,The errors between experimental thermal conductivity and the calculated conductivity by empirical formula are below10%,so the formula of fiber conductivity can be applied to practical enginnering.

为探索改善工程应用中高真空多层绝热层绝热性能的方法，本文实验研究中首先测量了包扎在实际低温储罐上不同结构的高真空多层绝热层的绝热性能，并分析了环境温度、环境压力，层数、不同隔热材料的组合等因素对工程应用中的高真空多层材料绝热性能的影响；然后利用多层绝热层中的低温真空环境测量5层干法纸在不同温度区间内的表观导热系数，在有限实验数据的基础上用牛顿迭代数值拟和出计算5层干法纸表观导热系数的经验公式，对比经验公式计算值和实验测量值，发现二者的误差在10%以内，因此在工程应用中可用本文的经验公式计算干法纸在低温下的导热系数。

This paper puts forward a numerical model, a parallel operator splitting-up implicit iterative scheme, parallel arithmetic program, parallel arithmetic information and alternating-direction mesh subdivision.

从生产实际出发，提出数学模型，构造大规模精细并行计算的耦合算子分裂隐式迭代格式，设计了并行计算程序和并行计算的信息传递和交替方向网格剖分方法。

NLS-NCG is an algorithm whose line search step length is determined by a formula instead of line search.

NLS-NCG是用一个固定的公式来计算搜索步长，而不用迭代产生搜索步长，降低了求解问题时的计算量，特别适合求解在计算搜索步长消耗很长时间的问题。

Compared with traditional method by solving a Jacobi matrix, calculating account is greatly decreased because only displacement and center of buoyancy need computing while those elements of waterline plane are not required.d Based on the research mentioned above, the paper presents the computer programmes of compartment definition, free surface effection, and some modules of the programme of the intact and damaged stability calculation.

与传统的拉格朗日乘子法相比，该优化方法公式推导简单，而且每次迭代只需计算水线面以下的排水体积和浮心坐标，不需计算水线面上的面积、漂心、惯性矩等要素，计算方法直接简便。 4在以上理论研究的基础上，开发了舱室定义，自由液面修正的计算机软件；编制了船舶完整、破损状态下的浮态、稳性计算的部分模块。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。