机器学习

Search documents
字节跳动创始人张一鸣久违露面并发言,现身上海徐汇知春创新中心!长期关注人才的招聘与培养
Sou Hu Cai Jing· 2025-10-10 06:43
活动现场,字节跳动创始人张一鸣久违露面并发言。张一鸣称,自己长期关注人才的招聘与培养,注意到许多人才的潜力尚未被充分挖掘。他以机器学习 中的"过拟合"现象作比,指出有些人专业技能很强,但在创新任务面前却难以发挥。他强调,创新中心希望培养的是思维活跃、富有热情与韧性的青年人 才,鼓励他们独立思考、重视实践,保持长期主义视角,在探索中成长,并学会以平常心拥抱不确定性。 【免责声明】本文仅代表作者本人观点,与和讯网无关。和讯网站对文中陈述、观点判断保持中立,不对所包含内容的准确性、可靠性或完整性提供任何 明示或暗示的保证。请读者仅作参考,并请自行承担全部责任。邮箱:news_center@staff.hexun.com 蓝鲸新闻10月10日讯(记者 武静静)据知春创新中心公众号,10月9日,上海徐汇知春创新中心正式开业,该中心由字节跳动创始人张一鸣、上海交通大 学ACM班创始人俞勇教授共同发起。定位为民办非营利性机构,将面向对泛计算机与人工智能感兴趣的年轻人开放招聘。 本文首发于微信公众号:蓝鲸新闻。文章内容属作者个人观点,不代表和讯网立场。投资者据此操作,风险请自担。 ...
京北方实控人方减持套现1.94亿元 2020年上市募9.3亿
Zhong Guo Jing Ji Wang· 2025-10-10 02:59
中国经济网北京10月10日讯 京北方(002987.SZ)昨日晚间披露关于控股股东、实际控制人及一致行 动人权益变动触及1%整数倍的公告。 公司于2025年7月12日披露了《关于实际控制人之一致行动人减持股份的预披露公告》。公司控股 股东、实际控制人之一致行动人元道(温州)创业投资合伙企业(有限合伙)(更名前为:和道(天 津)企业管理合伙企业(有限合伙),以下简称"元道投资")计划自公告披露之日起十五个交易日后的 三个月内通过大宗交易及集中竞价交易方式减持其持有的公司股份不超过26,000,000股,即不超过公司 总股本的3.00%。其中以大宗交易方式减持公司股份不超过公司总股本的2%,以集中竞价交易方式减持 公司股份不超过公司总股本的1%。 京北方首次公开发行股票募集资金总额为92,551.68万元,扣除发行费用5,996.68万元后,募集资金 净额86,555.00万元。京北方于2020年4月22日披露的招股说明书显示,其拟募集资金86,555.00万元,分 别用于金融IT技术组件及解决方案的开发与升级建设项目、基于大数据、云计算和机器学习的创新技术 中心项目、金融后台服务基地建设项目和补充流动资金。 京 ...
3D打印铝合金强度达传统铝材5倍 有望用于制造轻量化飞机部件
Ke Ji Ri Bao· 2025-10-09 23:37
美国麻省理工学院研究团队结合模拟计算与机器学习,研制出一种新型3D打印铝合金,不仅耐高温, 强度更是传统铸造铝合金的5倍,且比未经机器学习辅助设计的合金强度高出50%。相关研究成果发表 于新一期《先进材料》杂志。 研究团队展望,这种3D打印铝合金有望用于制造喷气发动机风扇叶片等部件,制造出更轻、更强、更 耐高温的产品。目前风扇叶片多采用钛合金或先进复合材料,而钛比铝重50%以上,成本更是铝的10倍 之多。 团队强调,若能以更轻、更强的材料制造风扇叶片,将使交通运输领域大幅降低能耗。此外,得益于 3D打印技术在复杂造型、材料节约与设计自由方面的优势,该合金还可应用于高端真空泵、汽车冷却 系统及数据中心散热设备等场景。 (文章来源:科技日报) 这种新合金由铝与其他元素复合而成。研究团队利用模拟计算与机器学习,大幅缩小了候选材料的筛选 范围,高效锁定了目标成分。传统方法需模拟上百万种材料组合,而借助机器学习,研究团队仅评估了 40种成分,就精准找到了兼具高强度与良好打印性能的铝合金配方。 实际打印测试结果与预测高度吻合:新合金的强度为目前通过传统铸造法制备的最强铝合金的5倍,且 比未经机器学习辅助设计的合金强度高出 ...
高盛:股市尚未处于泡沫之中,围绕机器学习及AI领域将催生新一波明星企业
Ge Long Hui A P P· 2025-10-09 05:44
该行认为目前正进入一个时代,领先科技股的命运愈来愈依赖于其背后的实体基础设施。暴增的电力需 求无法仅靠应用程序或软件解决,必须投入真正资源于发电与配电领域,这将为能源、资源,甚至房地 产及运输等行业带来更广阔的增长与回报前景。在科技行业内部,回报来源亦将进一步分化。2020年代 的领先科技巨头很可能继续主导各自领域,但快速的创新——尤其是围绕机器学习及人工智能的领域, 将催生新一波科技明星企业,借助当前的资本支出热潮推出新产品与服务。 格隆汇10月9日|高盛发表环球股市策略报告表示,目前环球市场行为和定价确实出现了一些与过去泡 沫相似的迹象,同时也观察到几个关键差异:首先,科技板块至今的上涨主要由基本面增长所驱动,而 非对未来增长的非理性投机;其次,表现最强劲的领先企业拥有异常稳健的资产负债表;第三,人工智 能领域迄今仍由少数现有巨头主导,而多数泡沫往往出现在竞争激烈、投资者及新进入者蜂拥而至的阶 段。 对于美股大科技公司的估值是否合理?该行指由于无法确切知道相关公司最终将实现的盈利与回报,这 个问题显然难以回答,但却是当前多数投资者正在面对的课题。该行从以下几个角度分析:1)与过去泡 沫时期的估值比较,2) ...
量化模型持续进化,他是指数增强的“超级黑马”
点拾投资· 2025-10-09 01:04
导读:过去一年,人工智能出现了革命性的技术突破。通过把强化学习的思路和大语言模型架构整合,实现了机器学习的自我思考能力。机器学习 不再只是一种强大的数据处理工具,还能通过训练变得越来越聪明,突破人脑的思维边界。比如说自动驾驶、机器人等领域,都在人工智能时代, 实现了重大技术突破。 在量化投资领域,也有一位深耕机器学习多年的基金经理:安信基金的施荣盛。 他是公募量化中的"少数派",用"白盒化"的机器学习方式捕获 Alpha,用统一的模型管理所有的指数增强产品。这是一种更现代、更创新、更具有科技含量的量化模型,也帮助施荣盛管理沪深300指数增强产品 以来,取得了优异的超额业绩表现。 沪深300作为A股龙头聚集的核心指数,我认为是指数增强"极卷"的赛道。今年上半年,沪深300指数增强基金,合计规模增长超过3亿的也只有5 只。施荣盛管理的安信量化精选沪深300 指数增强规模增长超10亿,并且近一年回报和最大回撤均表现出色。 | 車を開駅 | 近一年 | 近一年 | 2024年末 | 2025年中报 | 下来在 | | --- | --- | --- | --- | --- | --- | | | 回报 | 最大回撤 ...
北大校友、华人学者金驰新身份——普林斯顿大学终身副教授
机器之心· 2025-10-04 05:30
机器之心报道 机器之心编辑部 今天,华人学者金驰(Chi Jin)宣布他在普林斯顿晋升为终身副教授。 金驰于 2019 年加入普林斯顿大学电气与计算机工程系,担任助理教授。在普林斯顿的 6 年任期内,他在 AI 领域的学术影响力迅速提升。 个人主页: https://sites.google.com/view/cjin/ 他的副教授任命将于 2026 年 1 月 16 日正式生效。这一任命不仅是金驰个人学术生涯的重要里程碑,更是对他在机器学习理论领域所做出的基础性贡献的高度认 可,这些贡献为当前 LLM 的崛起提供了关键的数学基石。 去年 2 月, 金驰与杨笛一、杜少雷等华人学者一起获得了 2024 斯隆奖 。 主要贡献 金驰的职业生涯恰逢深度学习革命的爆发。自 2012 年 AlexNet 引领热潮以来,学界与业界在 2010 年代中期已能训练大规模非凸模型,但一个根本问题依然悬而未 决:为何像随机梯度下降(SGD)这样简单的优化器能如此有效,尤其在鞍点问题上缺乏理论解释。 金驰与导师 Michael I. Jordan 等人的合作正面回应了这一挑战,为深度学习的实践成功提供了坚实的理论基础。 与此同时,随 ...
桥水强势反弹!旗舰基金飙涨26%,或创2010年以来最佳表现
Sou Hu Cai Jing· 2025-10-02 18:32
今年1月,该公司任命资深宏观交易员Ben Melkman为副首席投资官。他是首批从其他公司加入这家传 统封闭公司的高管之一,也是最受关注的一位。Melkman目前与公司内部的David Trinh和Blake Cecil共 同担任副CIO。 Melkman于去年加入桥水,是最早、也是最引人注目的外部高管之一。桥水是一家系统化宏观对冲基 金,运用其所谓"永恒且普遍"的算法规则来进行交易,而Melkman的风格历来更为灵活。 他曾在Brevan Howard资产管理公司工作七年,担任合伙人。2017年,他创立了自己的对冲基金Light Sky Macro,并在五年后关闭该基金,随后加入Schonfeld Strategic Advisors,不到一年后就跳槽到桥 水。 相比之下,桥水的三位共同CIO几乎整个职业生涯都在公司内部发展。Bob Prince在1986年加入,Greg Jensen和Karen Karniol-Tambour大学毕业后就进入了公司。而Melkman的两位副CIO同事几乎没有任何外 部工作经验。 媒体援引知情人士表示,桥水基金(Bridgewater Associates)的旗舰宏观基金P ...
中国科学院最新论文登上Cell头条
生物世界· 2025-10-01 10:27
Core Insights - The article discusses a research paper published in Cell Press that evaluates the global flux of perfluoroalkyl acids (PFAA) from glaciers in the context of climate change, highlighting the urgency for coordinated action in managing historical pollutants and climate mitigation [5][6]. Group 1: Research Findings - The study identifies major PFAA release hotspots, including the Arctic, South Asia, and Central Asia, emphasizing the need for urgent action to manage these pollutants [5][6]. - PFAA, a significant industrial pollutant, poses serious risks to both ecological and human health due to its persistence and accumulation in cold regions, including glaciers [6]. - The research estimates that global glaciers release approximately 3,500 kilograms of PFAA annually, with suspended particles contributing about 12% of this total [6]. Group 2: Implications and Recommendations - The findings fill a critical gap in the global PFAA budget and stress the need for coordinated efforts to manage historical pollutants and mitigate climate change [7]. - The study suggests that controlling PFAA pollution in hotspot areas requires reducing emissions at the source and slowing down glacier melting through climate change mitigation [7]. - Effective strategies to address this dual threat necessitate interdisciplinary collaboration among scientists, local communities, and policymakers [7].
革命就要有人牺牲,最后一次人工智能革命牺牲的是谁的命?
Sou Hu Cai Jing· 2025-10-01 06:01
Group 1 - The core viewpoint is that the artificial intelligence revolution is seen as the last technological revolution for humanity, with significant implications across various sectors including defense, healthcare, and finance [1][3] - The development of artificial intelligence relies on core technologies such as machine learning, deep learning, and large models, aiming to achieve autonomous decision-making capabilities [3] - The revolution is expected to unfold over decades or even centuries, potentially accompanied by breakthroughs in energy fusion [1][3] Group 2 - There are known sacrifices in the advancement of artificial intelligence technology, particularly in defense applications, exemplified by the case of Feng Yanghe, a prominent expert who tragically died in a car accident while on duty [5][7] - Feng Yanghe's contributions to military artificial intelligence, including enhancing intelligent decision-making capabilities in defense systems, highlight the risks faced by researchers in this field [5][7] - The official narrative attributes his death to an accident, without evidence of external interference, emphasizing the inherent risks in pioneering technological advancements [7] Group 3 - The ethical, legal, and security challenges associated with the development of artificial intelligence are critical considerations as the technology continues to evolve [3][7] - Ensuring the ethical protection and technical safety of researchers is essential as artificial intelligence applications deepen in sectors like defense [7]
IDT(IDT) - 2025 Q4 - Earnings Call Transcript
2025-09-29 22:32
Financial Data and Key Metrics Changes - IDT reported a 43% increase in consolidated adjusted EBITDA to a record $129 million for the fiscal year 2025, with full-year adjusted EBITDA totaling $128.7 million, surpassing the updated guidance of $126 million [4][11][26] - Consolidated revenue increased by 2% for fiscal 2025, marking the first full-year increase since 2021, with Q4 revenue up by 3% [12][11] - Consolidated income from operations increased by 9% to $21.9 million in Q4 and by 55% to $100.4 million for the full year [13] Business Line Data and Key Metrics Changes - NRS's income from operations decreased by 3% to $5.8 million in Q4, while adjusted EBITDA increased by 32% to $9.3 million [14] - The fintech segment saw income from operations increase by 88% to $4.8 million in Q4, with adjusted EBITDA climbing over threefold to $5.5 million [16] - Net2phone's income from operations increased by 74% to $1.5 million in Q4, and adjusted EBITDA increased by 42% to $3.5 million [19] Market Data and Key Metrics Changes - BOSS Money's digital channel expansion contributed over 80% of remittance volume, with digital transactions increasing by 28% in Q4 and the amount sent increasing by 41% [5][17] - The average recurring revenue per terminal at NRS reached $299 in Q4, benefiting from increased penetration of NRS pay offerings [15] - The strengthening dollar impacted financial results from key South American markets, muting positive impacts from continued seat growth in net2phone [20] Company Strategy and Development Direction - The company plans to continue focusing on high-margin growth segments, with expectations of 20%-25% revenue growth and faster adjusted EBITDA growth in fiscal 2026 [16] - IDT is exploring opportunities in AI-driven solutions, particularly in net2phone, with a shift from a seat-based model to a usage-based model for AI agents [7][19] - The company is committed to returning cash to stockholders through buybacks and dividends while evaluating potential acquisitions [9][24] Management's Comments on Operating Environment and Future Outlook - Management expressed optimism about fiscal 2026, citing strong customer enthusiasm and the potential for continued growth despite challenges in the remittance business due to immigration policy changes [9][47] - The upcoming 1% federal tax on remittances is expected to accelerate the migration to digital channels, which are exempt from the tax [18] - Management acknowledged the competitive landscape and the need to adapt to changing market conditions while maintaining a focus on operational efficiency [41][42] Other Important Information - The company will report a revised measure of non-GAAP adjusted EBITDA starting Q1 FY 2026, excluding non-cash compensation expenses [24][25] - IDT's cash position increased by $30 million to $254 million, reflecting strong cash generation across all segments [23] Q&A Session Summary Question: What is the progress with stablecoins and Visa-linked wallets? - Management indicated that wallets have been launched in a beta phase and expect stablecoins to play a significant role in future transactions [28] Question: What is the WhatsApp launch date? - The WhatsApp feature is set to launch in the next few days for existing customers, with a broader rollout expected within 30-45 days [30] Question: What is causing the increase in churn rate in NRS terminals? - Management noted factors such as increased immigration enforcement, competition, and technical issues with equipment as contributors to churn [41][42] Question: Can the strong growth in BOSS Money be sustained? - Management believes that while growth may slow slightly, initiatives like wallets and WhatsApp will help maintain a competitive edge [46][49] Question: What is the focus for future acquisitions? - Management indicated a preference for smaller acquisitions over larger ones, emphasizing organic growth and internal investments [54]