小区域

• In order to research the two - regime well flow problems more accurately , in the third chapter , the analytical solutions have been derived in the situations as follows : the nonlinear exponent has been discussed in details according to the separations of nonlinear domain
  对非线性渗流区域上描述渗流规律的非线性指数进行了分区，即假定在非线性渗流区域内不同的小区域上，对应不同的非线性指数，并在理论上分别推导出了各分区内井流问题的更准确、更客观解析解。
• This thesis discusses the problem free - surface modeling technique of turbine blade according to the property of the runner blade and the present research achievement in free - surface modeling technique , the major study concerned are introduced below : firstly , it accomplished the study of intersection for blade - to - plane and present the method of three - step algorithms such as subdivision > iterative refinements approach ; meanwhile it solved the problem of small area extend of blade by use minimal modulus method
  本文针对水轮机叶片的特点，结合曲面造型技术的研究现状，研究了水轮机叶片的nurbs曲线曲面造型问题。主要工作有：第一，完成了叶片与任意平面求交问题的研究，提出分割-迭代-拟合三步求交算法。同时首次应用最小二乘拟合端部法解决了叶片的小区域延展问题。
• The solving steps are as follows : the field is divided into three regions by the cylindrical surface of the finite - length cylinder and the location of the delta - coils . because " the surface current source is placed at the interface , the non - homogenous restricted equation on the magnetic vector potential is transformed into the homogenous helmholtz equation . by using the method of separation of variables to solve equation and according to the interface conditions and the condition at infinity to determine the unknown constants , the expressions for the magnetic vector potential of the three regions are solved out
  在求解过程中，假定放置式圆柱线圈是由无穷多个对称圆环线圈密饶而成，首先求解含有有限长磁芯的通电对称圆环线圈的电磁场：以有限长圆柱磁芯的侧面和圆环线圈所在圆柱面为分界面将场域划分为三个小区域，由于场源放置在内边界面上，使得关于矢量磁位的非齐次约束方程转化成齐次亥姆霍兹方程，利用分离变量法求解，根据分界面郑州大学硕十研究生毕业论文摘要条件以及无限远条件确定待定常数，从而得到各场区矢量磁位的表达式。
• The search space is divided into many small areas , and each area is given a certain pheromone value . according to the state transition rules , the artificial ants move to the next solution which is generated randomly or calculated by particle swarm optimization . local search strategy is also added into psaco so that the search speed and precision is enhanced
  该算法首先将连续对象定义域平均分成许多边缘相互重叠的小区域,区域的稠密程度决定了算法解的精度,每个区域赋予一定的信息素值;蚂蚁根据状态转移规则在随机生成的可行解与利用微粒群算法得出的可行解之间选择下一步要去的位置;引入局部寻优策略,加强近似最优解邻域内的局部搜索,提高搜索速度和精度。
• During analyzing the 3dnfem , this thesis has used ansys to do finite element calculation for rocks and soils , to ansys finite element ' s parsing process and realizing method having done the acquirement , create and solve the real model basis on the ansys integral bullet plasticity model and nonlinearity equation resolution , and imitates the excavating problem using the " birth and death " of the element , and uses the sub modeling to carry on from the thick grid of large area domain to the dense grid of small region
  在进行三维非线性有限元初始地应力场反演分析中，使用了ansys有限元程序，对ansys的分析过程以及实现方法做了探讨，利用ansys内置的弹塑性模型和非线性方程求解器对实际工程建立模型求解计算；利用单元的“生和死”模拟开挖隧洞；利用子模型进行大区域粗网格转换到小区域密网格进行隧洞围岩的应力变形的研究分析。
• We put forward the best coordinate - based method to extract the form structure . the horizontal and vertical lines and text lines are applied as locating mark , and location coordinates is created according to these marks . the full document image is divided into several areas , so the aberration is removed because of each area is very small
  本文提出了基于最佳坐标系的表格结构提取方法，利用分布在表格中的水平和垂直线条作为定位标记，用这些定位标记组成多个定位坐标系，可将一幅表格划分为多个小区域，每个坐标系定位其附近的一个小区域。
• This result is different from the result on image sequences formed by visible light . the reason why other approaches fail is discussed . the computational cost of the approach proposed by horn & schunck is estimated and the hardware architecture for implementing it in real time is presented
  Lucas & kanade算法假定光流在一个小区域内是相同的，实际情况并非如此；然后，对这些结论进行了分析，并对horn & schunck算法的参数选择进行了详细的讨论；分析了horn & schunck算法的运算量，给出了算法实时实现的原理框图，为硬件实现打下了基础。
• This is a hot issue in the medical image processing . this paper applies slice - by - slice method to separate the slice into many small regions , then judge if these regions distribute seed point or not according to some rules . after that , choose the seed point as the center of a circle and make the region growing inside this circle , then conform the roi ( region of interesting ) into a whole liver tissue
  本文采取slice - by - slice的分割方法，把要分割的切片分成许多小区域，根据一定的规则，判断这些小区域是否分配种子点，接着在分配有种子点的区域进行区域增长，然后把小区域分割得到的roi ( regionofinteresting )整合成整个肝脏组织。