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insert
对于单片机上的一些简单的开发程序和他们的应用(For some simple microcontroller development process and their application)
- 2014-08-07 15:08:42下载
- 积分：1
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liziqunmatlab
粒子群反演算法，可用于波动反演，地震领域，岩石破裂领域。(Particle swarm inversion algorithm can be used in wave inversion, seismic field, rock fracture field.)
- 2017-06-03 09:56:18下载
- 积分：1
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国家集训队 论文集
National Training Team 1999 Proceedings
- 2020-06-23 02:20:02下载
- 积分：1
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lab20-PWM
说明： DSP28335产生10KHZ方波的例程，包含完整的工程文件，打开即可使用。适用于ccs6.0以上版本(The routine of 10KHZ square wave generated by DSP28335 contains complete engineering files, which can be opened and used. Suitable for CCS version 6.0 or above)
- 2020-06-16 09:20:01下载
- 积分：1
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RN8209 串口参考程序
RN8209C及D初始化及UART通讯参考程序
- 2022-06-14 17:07:31下载
- 积分：1
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Euler_DG_Quadrilateral_2D
自己写了一个二维Euler方程的间断有限元程序
上次发了一个三角形单元的程序 因为不是曲边单元 所以在圆柱后面容易形成涡
现在把程序改为曲边四边形单元了 没有涡出现
单元是8节点四边形单元 节点编号顺序是 1 5 2 6 3 7 4 8 也就是四个角点依次
是1 2 3 4 然后是边的中点编号 5 6 7 8.
时间推进采用 Runge-Kutta 方法
数值通量采用全局Lax-Friedrichs通量
仍然不能捕捉激波 因为没有做重构或者加人工粘性 等这个做出来了 再发一次。
程序没有进行优化 比如说内存的消耗没有优化 比如直边单元的边界积分仍然采
用了曲边的积分方法 增加了计算量 比如面积分、线积分都是采用的是Gauss-
Legendre-Lobatto积分 积分精度会比一般的Gauss-Legendre积分精度低一阶 等
等问题。 二维的 纯属交流性质 就没有考虑这些问题 ^_^
如果物面全部是直边 那么只要改变一个参数N 就可以获得不同的计算精度 且具
有谱精度 因为单元的节点是Gauss-Legendre-Lobatto积分点。 其实就是谱元法
（物面是曲边的情况我不清楚是不是也可以通过提高基函数的阶数 也就是增加N
来提高计算精度）(Wrote a two-dimensional Euler equations with discontinuous finite element program
Last made a triangular element of the program, not curved edge unit is so easy to form a vortex in the cylinder behind the
Program to curved edge quadrilateral element vortices appear
Unit is the order of 8-node quadrilateral element node number is 15,263,748 which is the four corners of the points in turn
Is 1234 and then the side of the midpoint of the number 5678.
Time promote the use of Runge-Kutta method
Numerical flux of the overall situation of Lax-Friedrichs, flux
Still can not capture the shock wave did not do the reconstruction or artificial viscosity do it Zaifayici.
The program is not optimized for example, memory consumption is not optimized such as straight-edge boundary integral of the unit is still mining
Integral method to increase the amount of computation such as surface integral with a curved edge, the line integral using the Gauss-
The Legendr)
- 2021-01-29 12:58:40下载
- 积分：1
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间断有限元
the structure of the DG-FEM is very similar to that of the finite element method (FEM), there are several fundamental differences. In particular,
the mass matrix is local rather than global and thus can be inverted at very
little cost, yielding a semidiscrete scheme that is explicit. Furthermore, by
carefully designing the numerical flux to reflect the underlying dynamics, one
has more flexibility than in the classic FEM to ensure stability for wavedominated problems. Compared with the FVM, the DG-FEM overcomes the
key limitation on achieving high-order accuracy on general grids by enabling
this through the local element-based basis
- 2022-06-13 20:11:15下载
- 积分：1
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ImageExplorer
用wpf做的图片浏览器，源码，C#，也是从别的地方下的(Does the picture with wpf browser, source code, C#, also from other places under)
- 2009-02-18 16:32:00下载
- 积分：1
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zonghe
永磁同步电机矢量控制的simulink仿真，自己按照原理搭建的电机模型(Simulink simulation of permanent magnet synchronous motor vector control, according to the principle of the motor model set up)
- 2017-10-21 18:48:29下载
- 积分：1
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mnsuer
说明： modbus 源码 modbus master yuanma(Modbus source modbus master yuanma)
- 2019-01-06 02:05:07下载
- 积分：1
