近些年，不少演唱会倾向于使用激光打造出众的舞美效果。那么，大型演出使用的高密度激光是否安 全？人们应该如何避免被激光伤害？科技日报记者日前就此采访了相关专家，为您一探究竟。 科技日报记者 王姗姗 前不久，某歌手在生日演唱会上，使用高密度激光打造"激光银河"舞美特效，很好地调动了现场气氛， 但有观众将此调侃为"致死量激光"。这也引发了公众对激光危害的讨论。 演唱会通常会使用"动态能量调节系统"实时监控和调整激光输出。"在演唱会中，'动态能量调节系统'通 过传感器监测环境光强、观众位置和激光路径，自动降低或调整激光功率和方向，以防止观众过度暴 露。"韩德专举例道，当监测到激光强度超过阈值时，这套系统会动态调低激光能量。同时，该系统还 可以通过调整激光投射角度和高度，避免光束直射人群，减少眼部或皮肤受伤的可能性。 第二，要采取必要的防护措施。例如让激光设备以30度以上仰角投射激光，并确保光束路径与观众头部 保持3米以上的安全距离。 此外，如果现场工作人员长时间处于激光覆盖区域，则需佩戴符合标准的激光防护装备，防止眼部因激 光照射出现刺痛、视物模糊等不适。 避免眼睛直视光束 针对现场观众"致死量激光"的调侃，韩德专认 ...

Core Viewpoint - The 2025 World Internet Conference Cultural Heritage Digitalization Forum emphasizes the importance of digital technology in preserving and innovating cultural heritage, highlighting the need for global cooperation in this area [2][3][4]. Group 1: Forum Overview - The forum is themed "Connecting the Past and Present, Smartly Drawing Civilization" and addresses four main topics: "Protection and Inheritance," "Technology and Innovation," "Industry Empowerment," and "Open Governance" [2]. - This is the first specialized forum on cultural heritage digitalization at the World Internet Conference, following the 2024 Digital Silk Road Development Forum [2]. Group 2: Significance of Digitalization - Digital technology is seen as a powerful driver for the innovation and protection of historical and cultural heritage, as stated by the Secretary-General of the World Internet Conference [2]. - The forum showcases local examples from Shaanxi, such as the "Digital Cabin" system for the Xi'an City Wall and VR experiences of the Terracotta Army, demonstrating the integration of technology and culture [2]. Group 3: Global Perspectives - International experts, including museum professionals, emphasize that digitalization is essential for connecting the past with the future, creating new opportunities in education, tourism, and cultural industries [3]. - The forum features discussions on how digital technology can enable sustainable protection and innovative use of cultural heritage, transforming the way artifacts are preserved and shared [3]. Group 4: Collaborative Efforts - Nearly 200 cases from over 20 countries were submitted, with 40 exemplary practices selected for compilation to provide references for global cultural heritage digitalization [4]. - The conference aims to promote data sharing, standard building, and international cooperation to support the sustainable development of cultural heritage [4].

Core Insights - A Chinese research team has successfully revealed the complete process of how a single plant somatic cell develops into a complete plant, addressing a long-standing challenge in plant life sciences [1][2] - The study, published in the journal "Cell," provides new theoretical support for crop genetic improvement and efficient regeneration [1] Group 1: Research Findings - The concept of "plant cell totipotency" indicates that plant cells can dedifferentiate to form totipotent stem cells, which can then develop into a complete plant [1][2] - The research team has identified the "key" to triggering cell totipotency, involving the specific gene SPCH from leaf stomatal precursor cells and the artificially induced high expression of the gene LEC2, which together form a "molecular switch" [3] - The study has documented the complete path of cell fate reprogramming, revealing a critical bifurcation point where cells can either continue to differentiate into stomata or be reprogrammed into totipotent stem cells under the influence of endogenous auxin [3] Group 2: Methodology and Techniques - The research utilized advanced techniques such as scanning electron microscopy, single-cell sequencing, transcriptome sequencing, and live imaging to capture the entire division process of a single plant cell [2] - The team has established a stable system for inducing somatic embryogenesis from single cells, marking a significant advancement in understanding plant cell reprogramming [2][3] Group 3: Implications for Agriculture - This breakthrough opens new pathways to overcome the long-standing "regeneration bottleneck" in agricultural biotechnology, potentially enhancing crop yields and resilience [1][3] - The research is currently being applied to other crops such as wheat, corn, and soybeans, indicating its broad applicability in agricultural practices [3]

"强"：研发经费投入连续三年超万亿元 "近年来，国资央企把科技创新作为头号任务，全面践行新型举国体制，以更大的力度集聚创新要 素、完善创新体系、激发创新活力，取得了积极进展和重要成效。"9月17日，在国务院新闻办举行 的"高质量完成'十四五'规划"系列主题新闻发布会上，国务院国资委主任张玉卓表示。 "'十四五'以来，中央企业取得了一系列令人鼓舞的科技成果，可以用'顶天立地'来形容。"张玉卓 自豪地说，"顶天"，就是服务国家战略需求，打造了"深海一号"二期等一批大国重器，建成了深中通道 等一批重大工程；"立地"，就是填补了一批产业技术空白，在集成电路、工业母机、工业软件、基础材 料等领域取得突破，切实推动了有关产业的安全发展。 不仅如此，张玉卓用"强""高""优"来概括"十四五"期间中央企业取得的创新成果。 "'强'主要是体现在创新实力明显增强。"张玉卓介绍，"十四五"以来，中央企业持续加大投入力 度，有效汇聚内外部创新资源，科技创新的"硬实力"明显提升。 张玉卓谈道，从研发投入看，中央企业研发经费年均增长6.5%，研发经费投入连续三年超过万亿 元，投入强度从2.6%提升到2.8%。去年，研发经费投入达到1.1 ...

Core Viewpoint - The use of high-density lasers, specifically Class3R lasers, in concerts has raised public concern regarding safety, particularly in relation to potential eye damage from direct exposure [1][5]. Group 1: Laser Classification and Safety - Class3R lasers are commonly used in concerts and are categorized by the International Electrotechnical Commission (IEC) as having medium to high output power, suitable for creating visually impactful stage effects [2][3]. - The IEC standard 60825-1 classifies lasers into four categories (Class1 to Class4), with Class3R being a subcategory that poses certain safety risks if not managed properly [2][3]. Group 2: Safety Measures and Recommendations - To mitigate risks associated with Class3R lasers, it is crucial to limit the output power and exposure duration, with a recommended maximum exposure time of 0.25 seconds [4]. - Dynamic energy regulation systems are employed during concerts to monitor and adjust laser output in real-time, ensuring safety by preventing excessive exposure to the audience [4]. - Additional safety measures include projecting lasers at angles above 30 degrees and maintaining a minimum distance of 3 meters between the laser beam path and the audience [4]. Group 3: Public Awareness and Precautions - Despite the safety measures in place, there are still risks associated with improper exposure to Class3R lasers, which can lead to eye damage or skin issues if individuals are repeatedly exposed [5]. - Audiences are advised to avoid direct eye contact with laser beams and to take precautions, such as closing their eyes or turning away during laser displays [5][6].

（文章来源：科技日报） 如今，很多爱美人士都会定期进行睫毛嫁接。以往人工嫁接睫毛需要两个多小时，而现在最新美睫机器 人能提供更高效的睫毛嫁接服务。 这款机器人集成了计算机视觉与人工智能等前沿技术，将原本长达两个多小时的睫毛嫁接过程缩短至20 分钟。美睫师先清洁客户睫毛，去除灰尘与油脂以保证嫁接持久度，接着给客户贴上带引导条码的眼贴 膜，为机器人定位提供参考。准备就绪后，美睫机器人开始操作。借助计算机视觉技术，它能够精准扫 描每位用户的眼部轮廓，还可以根据面部肌肉微动作进行实时动态调整，从而为用户定制独一无二的美 睫方案。同时，它采用的AI算法可将睫毛嫁接位置的误差控制在10微米以内。 ...

日本政府日前在首相官邸召开了"人工智能（AI）战略本部"首次会议，正式启动国家层面的AI战略规划 工作。会议明确，将在年内完成制定《AI基本计划》，目标是打造"全球最易于开发和应用AI的国家"， 并强调要在政府引导下大力支持可信赖的"国产AI"研发，同时梳理并调整现有制度与监管框架，为AI的 广泛运用扫清障碍。 日本首相石破茂出任战略本部长并在会上指出，AI已成为国家竞争力的核心领域，必须提升到国家战 略层面予以推进，这不仅是经济战略，也是社会转型的必要步骤。他表示，日本将以跨部门合作的形 式，在医疗、护理、农业、制造业等重点领域推动AI与机器人应用，通过创新提升公共服务和产业效 率。 经济产业大臣城内实同时兼任AI战略担当大臣并负责具体工作。他表示政府将依托专家团组成的专业 调查会加快讨论，计划在9月19日就具体支援措施、产业扶持和监管改革展开实质性磋商。他强调，政 府将积极支持国内企业和研究机构在国产AI开发上的努力，特别是高质量日语数据资源的整备、日语 大模型的研发，以及能够反映日本社会文化特征的本土化AI服务。同时，政府的规制改革推进室也将 介入，对阻碍AI应用的制度和规则进行逐一修正，以确保新技术能 ...

该方法有望帮助识别高疾病风险的人，指导筛查计划，支持医疗服务的长期规划。未来版本可能会包含 更多健康信息类型，并帮助改进个性化诊疗。但科学家指出，该模型会反映出训练数据中的偏见，其预 测在进一步测试之前不应被用于直接医疗决策。 （文章来源：科技日报） 大多数人一生中会不止一次生病，但预测不同疾病（如心血管疾病与癌症）如何互相影响是个难题。医 疗决策日益依赖于根据病史预测个体健康演变趋势。AI通过分析患者记录的大数据集，为识别疾病进 展模式提供了强大工具。但这些模型的全部潜力仍未得到充分发掘，尤其在人群规模上。 此次，来自德国癌症中心DKFZ的研究团队创造了一个AI模型——Delphi-2M，用于识别特定疾病相对 于患者记录中其他事件（如生活方式因素和其他健康状况）何时发生。该模型利用英国40万人的健康数 据训练，使用丹麦近200万人的数据进行了测试。他们发现，Delphi-2M基于个人医疗史，预测了超过 1000种疾病的发生率，准确性接近或好于现有工具，而现有工具大多仅能各自预测极少数疾病。该模型 还能模拟未来长达20年健康变化的可能路径，并产生合成数据，在保护隐私的同时能用于训练其他AI 模型。 《自然》杂 ...

Core Insights - The collaboration between Vanderbilt University and Dresden University of Technology has successfully compressed terahertz waves from wavelengths over 50 micrometers to less than 250 nanometers, which could significantly enhance the performance of optoelectronic devices [1][2] Group 1: Terahertz Technology Advancements - Terahertz waves, with frequencies between 0.1 to 10 terahertz and wavelengths ranging from 0.03 to 3 millimeters, have shown potential in various applications such as 6G communication, radar systems, biomedical imaging, and sensing [1] - The challenge of integrating terahertz waves into compact devices has been addressed by using a layered material composed of hafnium and chalcogen elements, achieving low energy loss during the compression process [1] Group 2: Future Implications and Research Directions - This breakthrough is expected to revolutionize optoelectronic integration, leading to the development of ultra-compact terahertz resonators and waveguides, which will be crucial in environmental monitoring and security imaging [2] - Integrating hafnium disulfide into van der Waals heterostructures may open new avenues for research in two-dimensional materials, paving the way for nanoscale optoelectronic integration [2] - The research establishes hafnium disulfide as an ideal platform for terahertz applications and lays the groundwork for exploring new physical phenomena in strong coupling states [2]

人体由约30万亿个细胞构成，每个细胞每秒发生近10亿次化学反应。一分钟内的生命活动规模如此庞 大，以至于"百亿亿次"这样的数值也仅能描述其冰山一角。 近年来，科学家不断深入探索细胞内部，从细胞核到基因组，逐步揭示微观世界的复杂性。他们发现， 大多数人类疾病并非单一因素导致，而是源于错综复杂的生物网络共同作用。面对浩瀚的生命数据，传 统方法难以应对。如今，人工智能（AI）正成为破解这一难题的关键。 读懂"生命语法" AI正以一种突破性的视角重新解读生物学：它将蛋白质序列视为一种可被解译的语言。 加速科学发现 Wake和Dyno的AI模型用于非常具体的任务，而非营利研究机构"未来之屋"的目标更宏大。 正如自然语言由字母和标点组成，构成细胞、骨骼和肌肉的蛋白质，是由一串串氨基酸组成。生物学家 发现，大型语言模型同样可用来识别氨基酸链中的潜在规律。 美国Dyno医药公司首席执行官埃里克·凯尔西克坦言："我曾认为蛋白质复杂到无法理解。但数据中自藏 秩序，譬如哪些氨基酸可置于衣壳的特定位置。现在，我们可利用AI自动分析数据，发现人类难以发 现的规律。"该公司正利用AI设计病毒衣壳，以实现更安全、高效的基因疗法。 AI的高 ...