2025S-Seminar #12 / Spring Semester Summary by M2 and D1 Students

2025.07.02

夏の気配が次第に濃くなってきました。春学期の全体ゼミもいよいよラストです！
The summer atmosphere is growing stronger day by day, and the seminar series for this spring semester has also come to its final stage.

本日のゼミでは、M2の田村さんとWeiさんがそれぞれの研究内容について発表を行い、その後、D1のTheethadさんが今学期にレビューした論文について発表しました。
In today’s seminar, M2 students Tamura and Wei presented their respective research topics, followed by D1 student Theethad, who gave a presentation on the literatures he reviewed over the semester.

それでは、今学期の研究を通じて得られた成果について、3名の学生にそれぞれ語っていただきましょう。
Now, let’s hear from the three of them about the insights and progress they have made in their research this semester.

田村 (Tamura)：
春学期は、研究の背景・関連する制度や既存研究を改めて整理することと、モデルの動学化・SP調査の準備を並行して進めてきました。制度については文献による調査に加え、6月には集合住宅でのヒアリングも実施することができ、EV充電器を取り巻く状況に対する理解の解像度を高めることができました。動学化・SP調査はまだ道半ばといった感じですが、社会的意義とオリジナリティのある研究になるよう、取り組んでいきたいと思います。
During the spring semester, I worked on organizing the background of my research, relevant systems, and existing studies, while also making progress on dynamic modeling and preparing for a SP survey. In addition to conducting a literature review on the relevant systems, I was able to carry out interviews at apartment complexes in June, which helped deepen my understanding of the context surrounding EV chargers. Although the dynamic modeling and SP survey are still in progress, I hope to continue working on this project to make it a socially meaningful and original piece of research.

ウェイ (Wei)：
4月からは、滞在時間の分布についてより深く掘り下げてきました。移動軌跡の可視化や推定カーブの作成を通して、実際の滞在時間は文献で示されているような理想的なものではないことが分かってきました。今回の発表では多くの貴重なアドバイスをいただき、大きな収穫がありました。この課題も、きっと近いうちに乗り越えられると感じています。一方で、ネットワークの構造によって生まれる違いはとても面白いテーマで、試してみたいことがたくさんあります。今後の展開がとても楽しみです。
Since April, I’ve been diving deeper into the distribution of stay durations. By visualizing movement trajectories and working with estimated curves, I’ve come to realize that actual stay times are not as ideal as what’s often suggested in the literature. That said, I received a lot of valuable feedback during this presentation, which was incredibly helpful. I’m confident that with these insights, the issue will be resolved soon. On the other hand, exploring how different network structures affect the results has turned out to be a really fascinating part of the study. There are so many ideas I’d like to try out, and I’m genuinely looking forward to what comes next.

ティータッド (Theethad)：
In spring of 2025, I have been reviewing 3 main areas. Firstly, I learned the stochastic assignment model. I saw many essay explaining benefits from stochastic input and output flow from the model. Secondly, I read and reviewed network design from 3 papers. There are 2 approaches for objective function where first one is variation inequality and second one is total cost. We can select to either of them. Lastly, I reviewed disaster paper to see the variation of trip during recovery period. From now, i will focus on specific problem of network design during recovery period from my selected city and learn more about approximation method for solve my network design problem.

written by Miaoheng Wei (M2)