Edward Xu a software engineer in Essen, Germany

Snapshots for a Graph in Database

A data structure to store, modify, query temporal evolutions and subgraphs of some graph is proposed in this post, in order to handle issues discussed in the previous post, relational database not for power grids. There are more benefits.

Spring 2021

Here are some photos I took in spring in Copenhagen (CPH), Denmark and Essen, Germany.

Relational Database not for Power Grids

After my 5-month part-time job at Utiligize, I begin to understand the problems in incumbent open-sourced tools for power system analysis.

Resume and Cover Letter

The resume played an important role in my last year at the university, because it forces me to think about what I can do and want. The best way to improve it is to receive feedback from others. In addition, there are some key points that I want to talk about. Some advice on cover letter writing is given in the last section.

2.5 Years at DTU

I have graduated from DTU with a MSc in Engineering. Here are some points that worth mentioning.

Power Grid as Multilayer Network

A power grid with multiple voltage levels can be modelled using a multilayer network. A graph in each layer represents all the cables at the same voltage level. A directed bipartite for a pair of adjacent layers consists of transformers connecting two voltage levels.

Lyngby, Winter 2021

Here are some photos I took in winter in Lyngby, Denmark.

Teaching Assistant for Stochastic Simulation

In June, 2020, I worked as teaching assistant (TA) for stochastic simulation at Technical University of Denmark. The course consists of 6 lecture days (3 hours lecture and 4 hours exercise per day) and a group project. Because of the COVID-19 pandemic, everything has to be done online, which made it harder for everyone.

英译中:阿波罗岩石样本引发了对月球形成的激烈讨论

一项新的研究表明,地球和月球在成分上存在明显差异,这有助于解释月球的形成。

我和丹麦的那些故事(五十七)

构思了一年多的硕士毕设提案终于通过了开题审核,接下来的任务就是把它变成现实。从一次睡觉前的灵感爆棚,到现在的 12 页开题报告,这一年多在丹麦的学习生活很不容易。每天入睡前都要思考两个问题,想法可不可行,有没有类似的想法。但只靠想是不够的,更需要阅读和写作,以及朋友的帮助。