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Program
利用表达式求解和栈的只是，设计一个简易的数学题库， 可供小学生作业，并能给出分数。
要求：建立试题库文件，随机产生 n 个题目；题目涉及加减乘除，带括弧的混合运算；随时可以退出；保留历史分数，能回顾历史，给出与历史分数比较后的评价。(Use solving expressions and stack just design a simple math exam, students for the job, and can give a score.
Requirements: Create test file, randomly generating n topics topics involving addition, subtraction with parentheses mixing operation ready to quit keep historical scores, can look back at history, and history is given uation scores after comparison.)
- 2020-12-29 22:59:01下载
- 积分：1
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PCA算法程序 pca
PCA算法程序设计步骤：
1、去均值
2、计算协方差矩阵及其特征值和特征向量
3、计算协方差矩阵的特征值大于阈值的个数
4、降序排列特征值
5、去掉较小的特征值
6、去掉较大的特征值(一般没有这一步）
7、合并选择的特征值
8、选择相应的特征值和特征向量
9、计算白化矩阵
10、提取主分量
(PCA algorithm programming steps: 1 to mean 2, calculation of covariance matrix and its eigenvalues and eigenvectors 3, the calculation of covariance matrix eigenvalues greater than the threshold number of 4, in descending order of eigenvalue 5, remove the smaller eigenvalue 6, remove the larger eigenvalue (usually not this step) 7, the combined choice of eigenvalues 8, select the appropriate eigenvalues and eigenvectors 9, computing whitening matrix 10, principal component extraction)
- 2021-03-09 13:09:27下载
- 积分：1
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SQP方法
序列二次规划(SQP)方法被认为是解决非线性约束优化最有效的方法之一，传统的SQP算法每一步迭代都要求解QP子问题。
(Sequential two times programming (SQP) is considered to be one of the most effective ways to solve nonlinear constrained optimization. The traditional SQP algorithm requires QP iteration for every iteration.)
- 2020-10-06 16:07:38下载
- 积分：1
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dian004
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)
- 2020-11-22 15:29:38下载
- 积分：1
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ekfslam_v2.0
It is a code for simulation of fast slam in matlab
- 2012-10-10 07:43:08下载
- 积分：1
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fdtd-3D
计算同轴电缆的时域有限差分算法的matlab程序(Finite-difference time-domain algorithm matlab program calculated coaxial cable)
- 2012-10-18 15:06:49下载
- 积分：1
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UMAT-JC
适用于ABAQUS的自定义材料子程序，适用于Johnson-Cook材料模型(Apply to custom material ABAQUS subroutine for Johnson-Cook material model)
- 2020-11-04 16:59:51下载
- 积分：1
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source
线弹性模型，可以对一般的弹性体通过abaqus进行验证使用(Linear elastic model)
- 2013-11-18 10:33:29下载
- 积分：1
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Goal_programming_model_sparse
针对多期随机规划问题，利用情景树方法来求解(For multi-period stochastic programming problems, the use of scenarios to solve Tree)
- 2016-01-05 21:33:06下载
- 积分：1
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fdtd_2D_TE_Veszt_PML
2维TE波的FDTD的源程序。周期边界条件，有限宽度的吸收边界条件(Two-dimensional TE wave FDTD source. Periodic boundary conditions, the limited width of the absorbing boundary conditions)
- 2021-04-13 15:58:57下载
- 积分：1
