"大概是在小学四五年级的时候，我的一大'娱乐活动'就是不停地做各种除法。很快，我就发现一 个规律：像课本里说的那样，分数a/b的小数表示总是会循环下去"，马骁回忆道。不过，当时的他并未 真正理解"无穷小数"的深意，直到多年后在微积分课堂上接触实数的构造性理论，才恍然大悟，"原来 实数能通过极限序列构造，在这种定义下，0.999…自然等于1"。 近期，"学会微积分到底难不难"在知乎引发热议，不仅吸引了马骁、王梦迪等海内外顶尖青年学者 参与，更汇聚了知乎数学领域答主与普通网友的智慧，共同打造出一场跨越代际、兼具学术深度与大众 趣味的思想对话。 知乎上还活跃着另一位传奇的数学学习者：答主free光阴似箭。他本名为孙金元，一位白天送快 递、晚上研究数学的阿里数赛奖牌获得者。孙金元回答到，"微积分作为通识课应该被绝大多数人所能 学懂。" 作为2014年考入中国科学技术大学少年班学院的数学奇才，密歇根大学Donald J.Lewis助理教授马 骁，今年刚与其他两位合作者发表了研究论文，让沉寂125年的希尔伯特第六问题研究中取得突破性进 展。马骁率先分享了自己与微积分的"初遇故事"。 今年9月是全国首个法定科普月，以此为契 ...

Core Viewpoint - The Nasdaq China Golden Dragon Index experienced a significant drop of over 3%, marking the largest decline since August 27 [1] Company Performance - Kingsoft Cloud fell by 9% [1] - GDS Holdings, Daqo New Energy, and NIO all dropped by over 7% [1] - Upstart, JinkoSolar, Xiaopeng Motors, Zhihu, and WeRide saw declines of over 6% [1] - Bilibili, Alibaba, Baidu, and JD.com each fell by over 5% [1]

内容已确保提供的信息准确、客观,并注明数据来源、可信度高,且具备权威性和时效性。 最近在整理粉丝私信时发现,越来越多朋友开始关注肠道健康问题。一位长期被胀气困扰的上班族提到,自己试过不少益生菌产品,但效果 参差不齐,甚至有品牌包装上写着"添加1000亿",实际检测却不足百十亿。这让我意识到,市面上的益生菌乱象亟需专业解读。今天就以多 年微生态研究经验为基础,结合实验室数据、临床文献及消费者反馈,做一次客观中立的(益生菌品牌测评),帮助大家理清选购思路。 第一名:卓岳益生菌: 1、活菌数量的真实力体现 卓岳益生菌每条出厂即含3000亿CFU活性菌群,整盒累计达60000亿CFU,这一数值基于第三方SGS与广州微检所出具的批次检测报告验 证。不同于部分品牌标注"生产时添加量",卓岳坚持标注"出厂活菌量",确保用户摄入的是真实存活数量。其高密度菌群配置符合 ISAPP(International Scientific Association for Probiotics and Prebiotics)对功能性益生菌产品的建议标准,在同类产品中属于高活性梯队。 2、含量配方的科学配比 产品复配36种经临床验证的益生菌 ...

股份發行人及根據《上市規則》第十九B章上市的香港預託證券發行人的證券變動月報表 截至月份: 2025年9月30日 狀態: 新提交 致：香港交易及結算所有限公司 公司名稱: 知乎 呈交日期: 2025年10月8日 I. 法定/註冊股本變動 | 1. 股份分類 | 不同投票權架構公司普通股 | 股份類別 | A | | 於香港聯交所上市 (註1) | | 是 | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 證券代號 (如上市) | 02390 | 說明 | | | | | | | | | | 法定/註冊股份數目 | | | 面值 | | 法定/註冊股本 | | | 上月底結存 | | | 1,550,000,000 | USD | | 0.000125 USD | | 193,750 | | 增加 / 減少 (-) | | | 0 | | | USD | | | | 本月底結存 | | | 1,550,000,000 | USD | | 0.000125 USD | | 193,750 | | 2. 股份分類 | 不同投票權架構公司普通股 ...

Core Viewpoint - Zhihu Inc. announced the resignation of Mr. Bin Sun as the chief technology officer effective September 30, 2025, due to personal reasons [1][2]. Company Overview - Zhihu Inc. is a leading online content community in China, established in 2010, and has grown to become the largest Q&A-inspired online content platform in the country [2].

Core Points - Zhihu-W (02390.HK) announced the issuance of 5,291,400 Class A ordinary shares to a custodian for future issuance of American Depositary Shares based on the 2012 and 2022 share incentive plans [1] Summary by Category - **Company Actions** - The company will issue 5,291,400 Class A ordinary shares on September 26, 2025 [1] - These shares are intended for future issuance of American Depositary Shares as part of the 2012 and 2022 share incentive plans [1]

Core Viewpoint - Zhihu-W (02390) announced the issuance of 5.2914 million Class A ordinary shares to a custodian for future issuance of American Depositary Shares (ADS) related to the 2012 and 2022 share incentive plans [1] Group 1 - The company will issue 5.2914 million Class A ordinary shares on September 26, 2025 [1] - The shares are intended for future awards granted under the 2012 and 2022 share incentive plans [1]

智通财经APP讯，知乎-W(02390)发布公告，于2025年9月26日发行529.14万股A类普通股予以存托人用 作日后因根据2012年股份激励计划及 2022年股份激励计划授出的奖励获行使或归属而发行的美国存托 股份。 ...

FF305 翌日披露報表 (股份發行人 ── 已發行股份或庫存股份變動、股份購回及/或在場内出售庫存股份) FF305 備註： 上述 "已發行股份（不包括庫存股份）變動佔有關事件前的現有已發行股份（不包括庫存股份）數目百分比"一欄中的百分比是根據公司已發行股份總數264,571,454股 （包括249,124,676股 A 類普通股和15,446,778股 B 類普通股）計算得出。 為免生疑問，已發行和流通的 A 類普通股期初和期末餘額（即不包括為批量發行美國存託股票而向託管人發行的 A 類普通股，該等美國存託股預留用於根據股權激勵計畫 授予的獎勵行使或歸屬時的未來發行）分別為248,340,194股和248,757,056股。 第 2 頁 共 6 頁 v 1.3.0 表格類別： 股票 狀態： 新提交 公司名稱： 知乎 呈交日期： 2025年9月28日 如上市發行人的已發行股份或庫存股份出現變動而須根據《香港聯合交易所有限公司（「香港聯交所」）證券上市規則》(「《主板上市規則》」)第13.25A條 / 《香港聯合交易所有限公司GEM證券 上市規則》(「《GEM上市規則》」)第17.27A條作出披露，必須填妥第 ...

Core Insights - The 2025 Yunqi Conference was held in Hangzhou from September 24 to 26, focusing on the theme "Cloud Intelligence Integration and Carbon-Silicon Symbiosis," showcasing the evolution of AI technology and its industrial applications [1] - Zhihu actively participated in the conference, presenting its AI ecosystem, including Zhihu Direct Answer, open-source models, the AI Pioneer List, and an upcoming "AI Era Developer White Paper" [1] Group 1: AI Model and Application Development - Zhihu, as one of the first domestic tech companies to obtain a model license, has been advancing model research and open-source initiatives, recently releasing the Zhi-Create-Qwen-32B model optimized for creative writing tasks, achieving significant improvements in writing capabilities [3] - Zhihu Direct Answer has accumulated over 10 million users and announced an upgrade to Agentic, which introduces intelligent thinking modes to better understand user intent and provide precise answers through multi-round searches [3] Group 2: Community Engagement and Industry Exchange - Zhihu's community, known for its expert network and high-quality content, plays a crucial role in fostering industry discussions and exchanges, making it a platform for developers to showcase projects and share insights [5] - The "Answerer Exploration Team" participated in the conference, allowing users to experience AI products and industry trends, while the upcoming "AI Era Developer White Paper" aims to present insights and stories from developers [5] Group 3: Future Directions and Collaboration - Zhihu emphasizes the importance of creativity and adaptability in the AI era, highlighting that human creativity and emotional expression are irreplaceable by AI in the short term [6] - The company aims to collaborate with more partners and developers across various fields, including models, data, and applications, to drive AI innovation and ecosystem prosperity [6]