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.
核心实践 Core practice
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.