任意弧计算半径

说明：  这是用python语言编写的bp神经网络算法，用来评估算法的正交验证得分和平均准确率(This is a BP neural network algorithm written in Python language, which is used to evaluate the orthogonal verification score and average accuracy of the algorithm)

洛谷OJ P1000,1421,1422,1425 Python 3 代码(Luogu OJ P1000,1421,1422,1425 in Python 3)

层次分析法，简称AHP，是指将与决策总是有关的元素分解成目标、准则、方案等层次，在此基础之上进行定性和定量分析的决策方法。(It refers to the decision-making method that divides the elements that are always related to decision-making into objectives, criteria, schemes, etc. on the basis of which qualitative and quantitative analysis can be carried out)

Python密度聚类 最近在Science上的一篇基于密度的聚类算法《Clustering by fast search and find of density peaks》引起了大家的关注(在我的博文“论文中的机器学习算法——基于密度峰值的聚类算法”中也进行了中文的描述)。于是我就想了解下基于密度的聚类算法，熟悉下基于密度的聚类算法与基于距离的聚类算法，如K-Means算法之间的区别。 基于密度的聚类算法主要的目标是寻找被低密度区域分离的高密度区域。与基于距离的聚类算法不同的是，基于距离的聚类算法的聚类结果是球状的簇，而基于密度的聚类算法可以发现任意形状的聚类，这对于带有噪音点的数据起着重要的作用。(The main goal of the density based clustering algorithm is to find high density regions separated by low density regions. Different from distance based clustering algorithm, the clustering results based on distance clustering algorithm are spherical clusters, and density based clustering algorithm can detect clustering of arbitrary shapes, which plays an important role in data with noisy points.)

3DEC后处理程序接口压缩文件，下载试试帮助你(The 3DEC post-processor interface compresses the file, download it and try to help you)

Get weather data from cnv

说明：  python curses source code pgen2

可以进行金属材料断裂模拟，经试验验证该模型的正确性(the damage programme for steel in Abaqus)

说明：  可以翻译英文论文，非常简单便捷，效果还不错(Can translate English papers, very simple and convenient, the effect is good)

Python的基础资料，适合新手进行学习，附带讲解的PPT资料(Python basic materials, suitable for beginners to learn, with explanation of the PPT materials)