Time series analysis focus on the analysis of random variable sequences. In this article, I would briefly review the basic definitions and properties of time series, the typical models, and the prediction of time series. The concepts and formulas are from Applicational Time Series Analysis by Shuyuan He, published by Peking University Express.
Capture Rectilinear RGBD Data with iPhone
A rectilinear RGBD image will help a lot in computer vision tasks, such as 3D reconstruction. This tutorial will illustrate how to capture RGBD data with iPhone, export the data to Python, and rectify the data.
离别的维也纳没有钢琴
交换学期的最后一场旅行：摩天轮，蛋糕，宫殿以及世界各国的朋友们似乎可以弥补没有到金色大厅的遗憾。
敬冰冷宇宙中的意识光辉
To the glory of consciousness in the freezing universe.
第五大道
和 Tim Cook 自拍，参与 Apple Fifth Avenue 的重新开业活动，购买 Apple Watch Series 5，在纽约街上躺着过夜，走过纽约的著名景点。24 小时中，发生了无数以前根本没有想过的疯狂的事情。
布拉格的养老生活
旅行分两种，一种是马不停蹄打卡所有景点的硬核旅行，一种是每天睡懒觉好吃好喝的同时花一小部分时间随处走走逛逛的养老旅行。而我在布拉格的日子，应该算是后一种。
如何推翻“所有自然数都可以唯一地用不超过23个汉字表达”的反证法证明
“所有自然数都可以唯一地用不超过 23 个汉字表达” 当然是个伪命题，但是，在一个段子中，它居然被用反证法证实了。证实这个问题的反证法肯定有问题，然而段子里面的反证法听起来太过合理以至于找不出漏洞。最终，我曾经花了坐火车的晚上的时间找出了反证法的漏洞，现在把这些内容整理在这里吧。
Preprocessing Methods and Pipeline of Data Mining: An Overview
This is the course project of Seminar Data Mining (IN0014, IN4927) in Technical University of Munich. My topic described as "Give a quick overview over the data mining pipeline and then focus on methods to preprocess data such that it can be successfully tackled by data mining methods."
30 小时的苏黎世
借在欧洲交换之便，在 2019 年 5 月的一个周末开始一场仅仅 30 小时的，说走就 5 天以后走的苏黎世之旅。
Implementing Box-Cox Transformation for Linear Model
The linear model is a simple but powerful statistics model for predicting. However, sometimes, the relationship between given features and labels is not linear, such as the diameter of a circle and the area of it. But this does not necessarily mean the linear model is not suitable for them. By applying certain transformations, the model can still be optimized for more realistic problems.