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在手写字符自动识别时,由于手写字符中存在字符大小间距不一、粘连、断点,以及不连贯等情况,给字符自动分割识别带来极大的困难。针对该问题,提出了一种优化的手写字符自动分割算法。该方法依据滴水算法的原理,结合CFS(colorfillingsegmentation)做初步分割;再根据分割字符的连续黑色像素点的宽度判断是否为粘连字符,若为粘连字符,则在分割字符图片02倍宽度与08倍宽度之间扫描黑色像素...
动态有限差分法作为解决冲击动力学问题的有效方法而被广泛应用。但目前还鲜有学者给出该方法实现细节中的积分路径的形状和网格单元类型对计算结果影响效应的系统研究。针对这一问题,本文基于拉格朗日动态有限差分法求解框架,使用JAVA语言编写计算程序,模拟了应力波在长柱模型中的传播,利用理论解,对比了多种积分路径下模拟结果。然后模拟了应力波在无限大介质中的传播,从能量误差的角度,指出了四边形网格的沙漏效应缺陷...
数学家试图用数学算法计算“惊奇”,心理学家则试图用“惊奇”的数学算法来计算生活场景中所包含的信息,并用以探索场景知觉过程中的信息加工机制。
By a d-dimensional B-spline object (denoted as Od), we mean a B-spline curve (d = 1), a B-spline surface (d = 2) or a B-spline volume (d = 3). By regularization of a B-spline object Od we mean a pro...
In this paper we are concerned with substructuring methods for the second-order elliptic problems in three-dimensional domains. We 痳st design a simple and completely explicit nearly harmonic extensi...
In this paper, we consider the cascadic multigrid method for a parabolic type equa- tion. Backward Euler approximation in time and linear 痭ite element approximation in space are employed. A stabilit...
In this paper we are concerned with non-overlapping domain decomposition methods for the second-order elliptic problems in three-dimensional domains. We develop a new kind of substructuring method, ...
The numerical integration of many geometric partial di erential equations involves discrete approximations of several first- and second-order geometric di erential operators. In this paper, we consi...
In this paper, the discrete gradient methods are investigated for ODEs with 痳st integral, and the recursive formula is presented for deriving the high-order numerical methods. We generalize the idea...
In this paper, we present a generalized Peierls-Nabarro model for curved dislo- cations. In the generalized Peierls-Nabarro model, the anisotropic elastic energy is obtained e±ciently by solving the...
The uniaxial perfectly matched layer (PML) method uses rectangular domain to define the PML problem and thus provides greater flexibility and efficiency in dealing with prob- lems involving anisotro...
The uniaxial perfectly matched layer (PML) method uses rectangular domain to define the PML problem and thus provides greater flexibility and efficiency in dealing with prob- lems involving anisotro...
A new type of the KP equation with self-consistent sources (KPESCS) 痳st found by Melnikov ( Lett. Math. Phys. 7(1983) 129-136)is re-constructed via source generation procedure. New feature of the ob...
We shall establish a discrete weighted Helmholtz decomposition in edge element spaces, which is stable uniformly with respect to the jumps in the discontinuous weight function. The stable decomposit...
Based on some coupled discretizations, a local computational scheme is proposed and analyzed in this paper for a class of higher order 痭ite element eigenvalue approximations. Its e眂iency is proven b...

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