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BruteSearch
K-nearest neighbors 搜索 聚类时经常使用的一种方法 国外网站转载( The following utilities are provided:
- Nearest neighbor
- K-Nearest neighbors
- Radius Search
They al supports N-dimensions and work on double, it is possible to choose if return the distances.
Here is a time comparison with a vectrized m-code:
N=1000000 number of reference points
Nq=100 number of query points
dim=3 dimension of points
k=3 number of neighbor
tic
[idc,dist]=BruteSearchMex(p ,qp , k ,k) MEX
toc
tic
[idc,dist]=knnsearch(qp,p,k) VECTORIZED M-CODE
toc
p=rand(N,dim)
qp=rand(Nq,dim)
Output:
Elapsed time is 0.962640 seconds.
Elapsed time is 18.813100 seconds. )
- 2009-03-30 08:08:08下载
- 积分：1
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Redge-regression
说明： 岭回归的matla源程序，主要用于解决无法求逆或需要更好的解时所用的(Ridge regression matla source, mainly used to solve the inverse can not be a better solution or need to use when)
- 2011-04-13 23:05:55下载
- 积分：1
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BFGS
拟牛顿法和最速下降法(Steepest Descent Methods)一样只要求每一步迭代时知道目标函数的梯度。通过测量梯度的变化，构造一个目标函数的模型使之足以产生超线性收敛性。这类方法大大优于最速下降法，尤其对于困难的问题。另外，因为拟牛顿法不需要二阶导数的信息，所以有时比牛顿法(Newton s Method)更为有效。如今，优化软件中包含了大量的拟牛顿算法用来解决无约束，约束，和大规模的优化问题。(The quasi-Newton method and the Steepest Descent Methods only require that each step iterations know the gradient of the objective function. By measuring the change of the gradient, constructing a model of the objective function is sufficient to produce superlinear convergence. This method is much better than the steepest descent method, especially for difficult problems. In addition, because the quasi-Newton method does not require information on the second derivative, it is sometimes more effective than the Newton s Method. Today, the optimization software contains a large number of quasi-Newton algorithm used to solve the unconstrained, constraint, and large-scale optimization problems.)
- 2017-05-05 10:28:29下载
- 积分：1
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d-s_for_matlab
matlab实现的D-S证据理论代码实现(the matlab implementation DS evidence theory code to achieve)
- 2013-03-20 23:07:01下载
- 积分：1
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sd
说明： 其中有线性STBC的球型译码算法的MATLAB代码，
其中有球型半径的决定以及另外一个球型译码算法的代码等等，可以用于球型译码算法学习的参考(Among them, spherical linear STBC MATLAB code decoding algorithm, including the decision of the radius of ball and another ball code decoding algorithm, etc., can be used to study spherical reference decoding algorithm)
- 2010-09-25 17:36:02下载
- 积分：1
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chap8_4
单输入单输出连续系统灰色PID位置跟踪。(single-input single-output continuous system gray PID position tracking.)
- 2007-05-20 17:08:51下载
- 积分：1
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PV_MPPT
matlab simulation of MPPt of PV array
- 2014-11-12 19:57:00下载
- 积分：1
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BRF
关于径向基的预测，本篇为能见度的预测，可添加其他数据进行其他方面预测。(For the prediction of radial basis, this article is a prediction of visibility, and can add other data to predict other aspects.)
- 2020-09-20 00:37:52下载
- 积分：1
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New folder
A new technique of free-space simulation has been developed for solving unbounded electromagnetic problems with the finite-difference time-domain method.
- 2020-06-18 06:20:01下载
- 积分：1
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compressed-sensing-code
《压缩感知及应用》代码，许多常用的学习压缩感知matlab代码(The compression perception and application code, many commonly used compression perception of learning matlab code)
- 2021-04-27 13:58:45下载
- 积分：1
