nonliearvibration

共轭梯度法（Conjugate Gradient）是介于最速下降法与牛顿法之间的一个方法，它仅需利用一阶导数信息，但克服了最速下降法收敛慢的缺点，又避免了牛顿法需要存储和计算Hesse矩阵并求逆的缺点，共轭梯度法不仅是解决大型线性方程组最有用的方法之一，也是解大型非线性最优化最有效的算法之一。 在各种优化算法中，共轭梯度法是非常重要的一种。其优点是所需存储量小，具有步收敛性，稳定性高，而且不需要任何外来参数。(Conjugate gradient method (Conjugate Gradient) is between the steepest descent method between the method and Newton' s method, it takes only a first derivative information, but to overcome the steepest descent method convergence slow shortcomings, but also to avoid the Newton method needs to be stored Hesse and disadvantages of computing inverse matrix and the conjugate gradient method is not only one of the most useful methods to solve large linear equations, solution of large-scale nonlinear optimization is one of the most effective algorithm. In various optimization algorithm, conjugate gradient method is a very important one. The advantage is that a small amount of memory required, with step convergence, high stability, and does not require any external parameters.)

电网络理论程序 matlab 半动态及动态节点编号优化 NODE为节点关系表 无错误，低警告(Electrical network theory the program matlab semi-dynamic and dynamic node numbering optimization the NODE node relational tables error-free, low-warning)

fortran cases for BEM

数值传热学Simple算法，Fortran编写(Simple using Fortran)

有限元计算控制加载中弧长法（arc-length）的matlab源程序(Loading FEM arc length control method (arc-length) matlab source)

sap4源代码！by fortran 这是一个有限元计算的软件 可以完成平面，三维的计算功能(SAP4 source code! By FORTRAN This is a finite element software can be completed planar, 3D computing power)

有限元n维实体材料单元，仅供科研用途，拒绝商业使用(N-dimensional finite element solid material element, for scientific purposes, refusing commercial use)

滚动轴承信号的保罗谱分析，hilbert Teager能量算子，信号平方，信号取绝对值等等方法求信号包络谱(hilbert transmission)

高斯-塞德尔迭代、拉格朗日差值、牛顿法、四阶龙格库塔 与数值分析有关的公式(Gauss- Seidel iteration)

使用labview2009开发平台，实现对机械信号频谱泄露的功能。(Use labview2009 development platforms for the mechanical function of the signal spectrum leakage.)