机器学习的核心目标是在未见过的新数据上实现准确预测。 当模型在训练数据上表现良好，但在测试数据上表现不佳时，即出现“过拟合”。这意味着模型从训练数据中学习了过多的噪声模式，从而丧失了在新数据上的泛化能力。 那么，过拟合的根本原因是什么？具体来说， ...

BEIJING, Jan. 31 (Xinhua) -- China's railways have transported over 200 million passengers since the 40-day Spring Festival travel rush kicked off on Jan. 14, China State Railway Group Co., Ltd.

中国科技公司DeepSeek在美国人工智能行业引发的剧烈震动已经持续数日，一些不同的声音正在不断传出。伦敦金融时报周三（1月29日）报道说，美国人工智能聊天机器人ChatGPT的开发者OpenAI指出，它已经发现证据表明，中国初创公司DeepSeek ...

菲律宾军方周二（1月28日）表示，菲律宾军队将在下个月的军事演习中接受美军中程导弹系统的训练，为下次美菲大型军演做准备。

On January 28, Chinese New Year's Eve, trucks loaded with goods were bustling in and out of the Zhengzhou International Land ...

探寻知识与乐趣的交融之道，热门教育游戏排行榜揭晓！这篇文章带你走进教育新领域，领略那些寓教于乐的Top10游戏，让孩子在轻松玩耍中提升学习兴趣，激发潜力。无论是幼儿园启蒙还是高中深造，这里有适合各年龄段的游戏精选，快来一探究竟吧！ 《桥梁工程师传送门》是一款建筑模拟类游戏，玩家扮演光圈科技测试实验室的新员工，负责在60个测试室中建造桥梁、斜坡和滑梯等建筑，并让班迪安全通过终点线。游戏提供了多种工具 ...

每年春节来临之际，在中国最繁忙的旅行季节——春运，很多人都在苦恼如何顺利抢到回家的火车票。在这个人人争抢的时刻，春运抢票的情况频频成为话题。你是否想知道“抢票”用英语怎么表达？别担心，今天就让我们一起学习在这个重要时刻的英语用法，帮助你在春运期间轻松应对。

Late-night hustle, a "health check" for high-speed trains. Follow Rick to the Beijing North EMU Depot, where dedicated workers inspect every inch of the trains. See how these teams ensure safe ...

Late at night on January 15, the maintenance workers were working feverishly to inspect and maintain a train of high-speed trains. The institute is responsible for the maintenance and repair of some h ...

SBS承认全澳大利亚传统的拥有者。© 2025 SBS ...

LANZHOU, Jan. 18 (Xinhua) -- During this year's Spring Festival travel rush, busy staff members at Lanzhou West Railway Station are joined by a group of foreign students, who help passengers carry ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...