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Apso-bp-Rainfall
- 降水短期气候预测是一个非常复杂、重要的研究课题。为了提高其预测能力，拟采用1959—2011 年逐月74 项大气环流特征量序列、月平均500 hPa 高度场和月平均海温场，选取预测因子；用主分量分析方法提取样本数据中主要信息为综合因子。用粒子群优化人工神经网络方法，建立宣城市夏季降水短期气候预测模型。对2007—2011 年宣城市夏季降水预报检验结果表明，粒子群优化人工神经网络收敛速度快，迭代次数少；试报平均绝对误差是66.5 mm，绝对值平均相对误差10.5 ，预测精度高，具有很好的应用推广前
alexa.gd.V1.1
- alexa查询程序源码（asp）版，仿chinaz网站查询的风格，更新说明： 1.专门争对SEO优化页面，便于收录 2.完善查询功能，增加了中文排名，网页跳出率，平均浏览时间，搜索引擎访问比例数据查询。 3.完善alexa精简查询及alexa详细查询 4.更多更改信息可直接到alexa排名查询系统查看 5.增加404.asp错误页面，智能判断域名查询，进一步优化查询，实现二级目录直接实现查询。-Alexa query program sourc
Average_Path_Length
- 计算复杂网络平均路径距离，运行无错误，推荐下载！-The computational complexity of network average path distance, error-free operation, it is recommended to download!
1
- Abstract-The paper introduces a statistical channel model which is a combination of Rice and lognormal statistics, and is suitable in principle to all types of environment (rural, suburban, urban) simply by tuning the model parameters. The mode
CS-dft
- 对一维语音信号，用正交匹配追踪的方法进行重构，首先对其进行了分帧，然后再一帧一帧的重构，最后计算了平均帧重构误差-One-dimensional speech signal reconstruction, orthogonal matching pursuit, the first of its sub-frame, and then again a reconstruction of a final calculation of the average frame reconstruction
CAPTURE
- PIC单片机的CCP功能 //220V的交流电源直接用电阻限流,经光耦隔离,形成脉冲送到CCP2, //CCP2模块的捕捉功能,设置为每16个上升沿捕捉一次,相当于平均滤波,目的是为了减小误差 //TMR1计数的分频系数计算:假设电源为50Hz,即一个周期为20ms,16个周期为320ms //320ms=320000us,单片机用4MHz晶振,指令周期为1us,设TMR1的分频系数为K:65536×K=320000 //得K=4.88,取K=8,即TMR1的预分频系数设为1
quality--index-of-image
- 此文档中的代码可以计算5种图像的质量参数，分别是：图像灰度均值、图像方差、图像平均梯度、熵和峰值信噪比及均方误差。-The code in this document can be calculated five kinds of image quality parameters, namely: the image gray value, image variance, average gradient image, entropy and peak signal to noise ratio
moxingyuece3
- 高速铁路路基沉降是一个复杂的系统过程,涉及不同时期、不同工况,选用单一的预测模型不足以反映路基整体的变形规律.Logistic模型及Verhulst模型的曲线均为S形,可以反映全过程的地基沉降与时间的关系.针对路基填筑期和降水期两个时段利用MATLAB软件编制程序计算模型参数,得到Logistic模型和灰色Verhulst模型,进而求得两者的最优加权组合模型.对比结果表明:在路基填筑期由两者的最优加权组合模型预测得到的结果与实测结果较吻合,拟合精度高于单一模型 而在降水期Verhulst模型的预
forcasting
- 关联度误差分析，全平均预测法算例，一次平均预测，一次指数滑动预测，二次平均滑动预测-Correlation of error analysis, the average prediction example, a average forecast, a slide index prediction, quadratic average sliding prediction
gussi-avg-fre-err
- Generate the code for adding user defined Gaussian Noise (in dB) and a. Filter out the same using average filter (generate function) b. Determine the frequency plot c. Determine error image, SNR and PSNR
QPSK
- OnPerformanceLimitsofDFTSpreadOFDMSystems DFT Spread OFDM has been proposed recently to reduce the Peak to Average Power Ratio (PAPR) of conventional OFDM transmission. Besides PAPR reduction, an important implication of DFT Spreading is that the ind
QPSK
- OnPerformanceLimitsofDFTSpreadOFDMSystems DFT Spread OFDM has been proposed recently to reduce the Peak to Average Power Ratio (PAPR) of conventional OFDM transmission. Besides PAPR reduction, an important implication of DFT Spreading is that the ind
tree
- 实现二叉树的先序遍历，中序遍历和后序遍历的递归和非递归算法，以及层次遍历的算法。 用二叉树来表示代数表达式，树的每一节点包括一个运算树，代数表达式中包含“+”，“—”，“*”，“/”和一位整数且没有错误，按照先乘除后加减的原则构造二叉树。 构造一颗哈夫曼树，输出对应的哈夫曼编码和平均查找长度。-Recursive and non-recursive algorithm binary tree preorder, preorder and post-order traversal, and
THE3
- a Matlab code that produces a plot of probability of bit error rate for QPSK versus SNR for three receive antennas, and three different combining methods: MRC, equal gain combining, and selection combining. The plot is generated by using Monte Carlo
kmeans
- K-means算法是最简单的一种聚类算法。算法的目的是使各个样本与所在类均值的误差平方和达到最小，该程序操作简单，能快速实现遥感影像的kmeans聚类，进行影像分类，显示分类结果。-K- means algorithm is the simplest kind of clustering algorithm.Algorithm is designed to make the sample and the average in the class to minimize the error sum
statistic
- IDL计算影像均值、标准差、偏差指数、信息熵、平均梯度、光谱扭曲程度、相关系数的小程序。-average gradient, correlation coefficient, entropy, cross entropy, joint entropy, mean square error and mutual information, signal to noise ratio, peak signal to noise ratio,
AverageDifference
- Average difference, maximum difference and absolute error of the two images
matlab
- 第一个是标准差，用于算数学模型均值，评价模型的平均量 第二个熵，用于评价信息量的大小，熵越大信息量越大。 第三个用于pcnn模型,评价是否接近理论模型,残差越小，就越接近理论模型-The first is the standard deviation, the mathematical model is used to calculate the mean, the average amount of uation model. The second entropy, to ua
image-quality-evaluation
- 该matlab代码主要用于计算图像的边缘强度，信息熵，灰度均值，标准差(均方差MSE)，均方根误差，峰值信噪比（psnr），空间频率(sf)，图像清晰度，互信息(mi)，结构相似性(ssim)，交叉熵(cross entropy)，相对标准差。- calculate the uation average gradient, edge strength, information entropy, gray are Value, standard deviation (mean square er
mod16qam
- Multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) is very sensitive to the carrier frequency offset (CFO), which not only affects the channel estimation but also the selection of a minimum error probability based p