Core Viewpoint - The release of the intelligent electric drive mechanical brake system by CRRC Brake System Co., Ltd. represents a generational innovation in the rail vehicle braking field, promoting the transformation of rail transit equipment towards greening and intelligence [5]. Group 1: Product Features - The newly launched intelligent electric drive mechanical brake system is fully electric, intelligent, and high-performance, replacing traditional compressed air drive with direct electric drive, addressing issues such as medium leakage and complex maintenance [3]. - The system features high responsiveness, superior control performance, high redundancy, and lightweight design, with brake response time shortened by approximately 40% and overall weight reduced by over 15% [3]. - Key components of the system are 100% equipped with intelligent self-diagnosis capabilities [3]. Group 2: Industry Impact - This innovation is a significant achievement in the development of new productive forces and is expected to facilitate the advancement of multi-system integration control technology in trains [10]. - The electric drive mechanical brake system can be widely applied to various models, including subways, intercity trains, urban trains, and high-speed trains [10]. - CRRC Brake System Co., Ltd. aims to contribute further to the construction of green, smart, and integrated urban rail systems through innovation-driven development and technology leadership [10].

Core Insights - The DeepSeek-AI team has published a new open-source AI model, DeepSeek-R1, which utilizes a large-scale reasoning model training method to enhance the reasoning capabilities of large language models (LLMs) through pure reinforcement learning, thereby reducing the human input required for performance enhancement [1] Group 1: Model Performance - DeepSeek-R1 outperforms traditionally trained LLMs in tasks related to mathematics, programming competitions, and graduate-level STEM problems [1] - The model achieved scores of 77.9% and 79.8% in mathematical benchmark tests for DeepSeek-R1-Zero and DeepSeek-R1, respectively, demonstrating superior performance in programming competitions and graduate-level biology, physics, and chemistry problems [1] Group 2: Training Methodology - The model incorporates a deep training phase under human supervision to optimize the reasoning process, utilizing reinforcement learning instead of human examples to develop reasoning steps, which reduces training costs and complexity [1] - The team emphasizes that the model receives a template to generate reasoning processes after being shown high-quality problem-solving cases, reinforcing learning through problem-solving rewards [1] Group 3: Future Research Directions - Future research may focus on optimizing the reward process to ensure more reliable reasoning and task outcomes [1]

团队进一步解释道，太阳星云消散后不久，木星与土星等巨行星轨道发生变化，扰动了彗星和小行星的 运行轨迹，致使它们向太阳系内侧冲击，猛烈撞击岩质行星。虽然科学家已从地球大气和岩石化学特征 中找到此类撞击的证据，但在火星上相关证据仍较为缺乏。他们推测，火星当时浓厚的富氢大气可能稀 释了彗星撞击所带来的物质。（记者刘霞） 太阳系诞生约400万年后，火星已基本成形，而太阳与其他多数行星仍处于形成阶段。当时，太阳系内 所有行星都处于围绕年轻太阳旋转的炽热气体和尘埃团块（太阳星云）中。部分行星会暂时将太阳星云 气体吸收进自身大气，但随着星云逐渐消散，这些气体会迅速逸失，大气密度也随之下降。 最新研究认为，火星可能"锁住"这部分气体的时间更长，从而维持了一层持久存在且很厚的原始酸性大 气。 据英国《新科学家》杂志网站9月16日报道，法国法兰西学院团队近日在欧洲行星科学大会上提出，火 星现在大气稀薄，但在早期可能拥有一层比现在厚数百倍的大气层。 团队通过模拟早期太阳系环境，估算抵达火星的彗星物质总量，并与现有实际观测值进行比较，推算出 火星原始大气的质量，结果显示其大气压约为现今地球的2.9倍。这表明，火星曾像披着一层厚毯般， ...

Core Insights - The article discusses the advancements in mRNA vaccine delivery using lipid nanoparticles (LNP), highlighting the development of a novel AI-driven platform called NanoForge by Jitai Technology, aimed at enhancing drug development efficiency [1][2]. Group 1: Technology and Innovation - NanoForge integrates AI, quantitative simulation, and high-throughput capabilities to provide developers with efficient construction abilities for LNPs, which are likened to "delivery rockets" for precise drug targeting [1]. - The platform boasts over 10 million lipid structures and 100,000 data points for model training, enabling targeted delivery to eight identified organs or tissues, with more than 100 authorized and filed patent applications [1][2]. Group 2: AI and Data Utilization - The platform operates on a series of vertical AI foundational models that cover critical stages in the nanomaterial development cycle, including molecular generation, property prediction, experimental design, formulation optimization, and expert validation [2]. - Unlike other databases, NanoForge includes both AI pre-training data and algorithms designed to uncover the formation rules of lipids, ultimately creating the world's largest lipid library [2]. Group 3: Development Efficiency - With the support of the NanoForge platform, research teams can achieve end-to-end optimization from computer design to in vivo validation, significantly reducing development time through a "design-learn-validate" closed-loop process [3]. - Over the past five years, more than ten pipeline projects have produced seven preclinical drug candidates, with one new drug entering the pre-application stage [3].

Group 1: New Materials and Technologies - The integration of "new materials + smart technology" showcased at the 7th China International New Materials Industry Expo includes a variety of products from wearable functional clothing to smart health devices [1] - Corn-based nylon, made from corn starch, offers superior skin-friendliness and moisture-wicking properties compared to traditional synthetic fibers, with a carbon emission of only 50% of that of petroleum-based nylon during production [2] - Nanofiber membranes developed by Chongqing Zhongna Technology Co., Ltd. can autonomously adjust pore sizes to balance waterproofing and breathability, achieving a waterproof capability of 10,000 mm water column and a breathability of 8 mm/s [3][4] Group 2: Product Innovations - A new type of carbon fiber ski board, made from T700-grade carbon fiber, is 30% lighter and has a 400% increase in impact resistance compared to traditional materials, with a price range of 2000 to 3000 yuan [6][7] - The electronic skin developed by Chongqing Graphene Research Institute has a sensitivity 1000 times greater than similar devices, capable of recognizing temperature, texture, and even reading Braille, enhancing the quality of life for disabled individuals [8][9]

8月16日，在四川省绵阳市梓潼县许州镇，随着最后一片T梁浇筑完成，G5京昆高速广绵段扩容项目智 慧梁场（以下简称"广绵智慧梁场"）全部完成5753片T梁预制任务。 "从去年1月开工至今，如此短的时间内完成5000余片T梁预制生产，换作传统梁场根本无法实现。"该项 目建设方、中铁五局集团第六工程有限责任公司副总经理刘智军说。 从"不可能"变为现实，背后是"数智帮手"。广绵智慧梁场以T梁智慧生产线、钢筋自动绑扎生产线、智 能张拉机器人等为核心的智能制造流水线大显身手。"智慧注入带来了效率和质量的同步跃迁，实现了 降本增效、提质增速，整个梁场生产总效率提升近100%。"刘智军说。 "两纵一横"降本增效 "智慧梁场布局有T梁智慧生产线、混凝土配送中心、钢筋配送中心、智慧控制中心等。"该项目负责 人、中铁五局集团第六工程有限责任公司常务副经理左陈森说，广绵智慧梁场负责生产、架设G5京昆 高速广绵段扩容项目相关标段34座主线桥梁、27座行车天桥及匝道桥梁所需的T梁，面临产品工艺复 杂、时间紧、任务重等挑战，智能化装备的应用使生产效率大幅提升。 走进广绵智慧梁场控制中心，巨大的屏幕上显示着数字孪生的虚拟梁场，仿佛把现实中的 ...

Core Viewpoint - China Petrochemical Corporation (Sinopec) has unveiled a new 60K large tow carbon fiber product at the 28th China International Composite Materials Exhibition, marking a significant advancement in the domestic carbon fiber market and filling a market gap [1] Group 1: Product Development - The 60K large tow carbon fiber is a domestic first, expanding Sinopec's production capabilities to nearly 20 models across various tow specifications, including 24K, 48K, and 60K [1] - The new product enhances the existing range of carbon fiber offerings, which includes both general and high-performance fibers, contributing to a self-sufficient carbon fiber industry chain in China [1] Group 2: Industry Context - Carbon fiber, known as "the king of new materials" or "black gold," has superior properties, being less than a quarter the weight of steel while having 7 to 9 times its strength, and is resistant to corrosion [3] - Traditionally, China's carbon fiber development has focused on small tow fibers, but Sinopec has made significant strides in large tow fiber production, achieving industrialization of 48K fibers in 2022 and now 60K fibers [5] Group 3: Technical Advancements - The 60K carbon fiber exhibits a 23% increase in tensile strength compared to 48K fibers and a 5% increase in elastic modulus, making it suitable for larger offshore wind turbine blades [5] - Sinopec is the first in China and the fourth globally to master large tow carbon fiber technology, having made significant technological breakthroughs since 2018 [6] Group 4: Future Outlook - The company has filed 842 patents in the carbon fiber and composite materials sector, ranking first in China and third globally, with plans to strengthen the carbon fiber industry chain and provide high-end material solutions for "Made in China" initiatives [6]

Group 1 - The "Science and China" event in Qinghai, initiated on September 17, aims to promote scientific knowledge among the local population through a series of lectures and activities led by renowned Chinese Academy of Sciences academicians and experts [1][2] - The event is part of the "National Science Popularization Month" and highlights the importance of scientific education and outreach, with a focus on leveraging high-end research resources from the Chinese Academy of Sciences [1] - Keynote speeches during the event emphasize the significance of material development and terahertz wave detection technology in advancing human civilization and astronomical observations, respectively [2] Group 2 - The event features multiple sessions held simultaneously in different venues, with various academicians and professors presenting on topics related to climate, astronomy, and materials science [2] - The organizing bodies include the Chinese Academy of Sciences, the Chinese Astronomical Society, and local government entities, showcasing a collaborative effort to enhance scientific literacy in Qinghai [2]

Core Insights - A new type of hydrogen negative ion electrolyte has been developed by a research team from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, leading to the creation of the world's first hydrogen negative ion prototype battery, marking a significant advancement from conceptualization to experimental validation [1][3] Group 1: Battery Technology - Hydrogen is recognized as a crucial component of future clean energy systems, existing in three forms: hydrogen positive ions, hydrogen atoms, and hydrogen negative ions, with the latter being a highly reactive and potential energy carrier [1] - The hydrogen negative ion battery operates similarly to lithium-ion batteries, utilizing the movement of ions between electrodes for charging and discharging, but replaces lithium ions with hydrogen negative ions [1] Group 2: Research and Development - The research team utilized a "core-shell structure" strategy, wrapping barium hydride around cerium trihydride to create an electrolyte with high hydrogen negative ion conductivity, low electronic conductivity, and high stability [1] - Experimental data shows that the battery's anode achieved a discharge capacity of 984 milliamp hours per gram, maintaining a capacity of 402 milliamp hours per gram after 20 charge-discharge cycles [3] Group 3: Future Applications - The hydrogen negative ion battery is seen as a new energy storage technology with potential applications in large-scale energy storage, hydrogen storage, and mobile power sources [3] - The research team plans to focus on optimizing the core materials and performance of hydrogen negative ion batteries to expand their application scenarios, contributing to the development of green energy in China [3]

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 ...