yibudianji

matlab code for finite element method

一个用matlab进行微积分的课件，希望对相关同学有帮助！(Using matlab to a calculus of courseware, the students hope that the relevant help!)

曲面样条插值实现（没用householder变换，不稳定）(Surface Spline Interpolation (useless householder transformation, instability))

刘老师的变结构控制，修改了符号函数，解决了抖振问题。( Variable Structure Control , modify the symbolic function to solve the chattering problem.)

本课程是航空航天类院校本科飞行器设计与工程专业教学计划中的一门技术基础课。为飞行器设计与工程专业学生的必修课。本课程的目的和任务是使学生掌握流体力学基本知识和空气动力学的基本概念、基本理论，以及解决空气动力学问题的基本方法和分析手段。本课程的内容可分为两大部分：低速空气动力学和可压缩空气动力学，包括了空气动力学的基本概念、低速流动和可压缩无粘流动的基本原理、绕翼型和机翼的不可压缩流动的薄翼理论和有限翼理论、激波理论、翼型亚音速和超音速线化理论及应用等。(This course is a class of undergraduate aerospace vehicle design and engineering teaching program in a technical basic course.)

program for fingerprint recognition using minutia The general shape of the fingerprint is generally used to pre-process the images, and reduce the search in large s. This uses the general directions of the lines of the fingerprint, and the presence of the core and the delta. Several categories have been defined in the Henry system: whorl, right loop, left loop, arch, and tented arch. Most algorithms are using minutiae, the specific points like ridges ending, bifurcation... Only the position and direction of these features are stored in the signature for further comparison.

Sum of values ignoring NaNs

谱系聚类发 给定聚类点数可得到聚类中心 很好很强大(Hierarchical clustering distributed clustering fixed points can be obtained very powerful cluster centers)

单因变量偏最小二乘回归matlab程序 程序尚不完善，固定提取了3个主成分，没有做寻求最佳主成分个数；没有做交叉有效性检验 (Single dependent variable and partial least squares regression matlab The program is not perfect, the fixed extract 3 principal components, do not seek the best number of principal components do not cross validation test)

随机骨料生成（Matlab建立的混凝土骨料随机投放模型）(concrete bone 2d model)