2018
破解含语序问题的点击验证码Cracking Sequence Click Captchas
针对按语序点选汉字的验证码：用 YOLO 定位汉字、切割分类，再组成点击序列，解决工商系统一类语序点选验证码。For Chinese click-captchas in reading order: YOLO detection, crop & classify characters, then assemble the click sequence.
Practice
实践 Practice
从真实问题出发，把做过的项目写清楚；点击「打开项目」可直达 GitHub 源码。 Projects built from real problems. “Open project” jumps to the GitHub repo.
2018
2018年全国大学生计算机应用能力大赛之住房月租金预测大数据赛2018 National Collegiate Contest — Housing Rent Prediction
第一次参加数据分析比赛的复盘：特征工程、模型尝试与改进流程，后续在 A 榜冲到第 3 名。A first data contest retrospective: feature work, modeling, and later reaching 3rd on leaderboard A.
2018
基于Scrapy框架的CrawlSpider类爬取当当全网商品信息Scraping Dangdang with Scrapy CrawlSpider
用 CrawlSpider 抓取当当商品与评论，写入 MySQL，并用中间件应对访问频率限制。Used CrawlSpider to collect Dangdang products and reviews into MySQL, with middleware for rate limits.