（ 转 载请注明出处：微信公众号 lixunlei0722 ） 关税加码背后的深层原因 年初至今，美国对他国的进口关税税率不断加码，尽管关税政策朝令夕改，但税率则超乎想象地往上加。如美方近日 公布的所谓"对等关税"方案，向所有贸易伙伴征收不同水平的关税，拟对中国加征 34% 关税，对欧盟、越南、中国 台湾地区、日本、印度、韩国、泰国、瑞士、印度尼西亚、马来西亚、柬埔寨等贸易伙伴征收 20% 到 49% 不等的 关税，对任何贸易伙伴的最低对等税率也为 10% 。 有研究机构统计结果表明，若该对等关税方案落地，叠加此前对个别国家加征的关税以及针对钢铁、铝和汽车等特定 产品加征的关税，美国所有进口商品的实际关税税率将从 2024 年年底的 2.3% 升至 26% 左右，达到 131 年来的 最高水平 。其中今年对中国加征的关税就达到 54% ，若加上2018年美国对中国加征的 关税水平，已经显著超过7 0% 了 ，可谓骇人听闻。其规格已经大大超过了 2018 年的贸易战。 近年来中国对美顺差的占比已下降 来源： Wind ，中泰证券研究所 再如，美国要重振造船业，因为 美国造船业的全球份额不到1%，而中国在50%以 ...

Group 1: Technological Innovation and Development - The 2025 Zhongguancun Forum highlights China's commitment to innovation-driven development, with R&D expenditure reaching 3.6 trillion yuan in 2024 and an R&D intensity of 2.68% [1] - China has established technology cooperation with over 160 countries and regions, signing 118 intergovernmental agreements, positioning Beijing as a strategic hub for technological innovation [2] - The forum showcased humanoid robots as a key focus, with applications in the automotive sector, emphasizing the importance of reducing data costs for large-scale industrialization [3][4] Group 2: Advancements in Electric Vehicles - The forum announced significant technological achievements, including the "AI + New Materials" initiative, with Xiaomi's automotive project utilizing advanced materials for enhanced vehicle performance [5] - Li Auto introduced its self-developed operating system, Li Xiang Star Ring OS, aimed at reducing BOM costs by billions annually, marking a significant step in automotive intelligence [6] - Beijing's efforts in promoting technology transfer have led to a thriving ecosystem with nearly 30,000 national high-tech enterprises and significant growth in strategic emerging industries like AI and electric vehicles [7] Group 3: Showcase of Smart New Energy Vehicles - The forum featured a dedicated exhibition area for smart connected new energy vehicles, with Xiaomi showcasing its SU7 models and various in-car products [8] - Innovative technologies such as the rubber-wheeled guided transit vehicle were highlighted, demonstrating advancements in public transport automation and energy efficiency [8][9] - The event underscored the automotive sector's role as a representative of new productive forces, showcasing China's rapid development in this field [9]

如果您希望可以时常见面，欢迎标星收藏哦~ 哈佛大学约翰·A·保尔森工程与应用科学学院 (SEAS) 的应用物理学家开发出一种光子路由器，未 来可以通过现有的光纤网络连接量子计算机。该设备为依赖微波信号的量子系统（尤其是对电噪声 敏感的系统）创建了一个强大的光学接口。 这一进展使研究人员距离构建模块化分布式量子计算网络更近了一步。这些网络将通过当今的全球 电信基础设施发送量子信息，而这些基础设施已经将数据作为光脉冲（称为光子）通过数百万英里 的光纤进行传输。 弥合量子鸿沟 研究团队由 SEAS 电气工程与应用物理学系 Tiantsai Lin 教授 Marko Lončar 领导，设计了一种 新型微波光学量子换能器。该设备可实现微波超导量子比特（经典比特的量子等效物）与光信号之 间的通信。他们的研究成果于4 月 2 日发表在《自然物理学》杂志上。 该换能器实际上是光子的路由器，它弥补了微波和光子之间的巨大能量差距，从而能够利用数英里 外产生的光信号来控制微波量子比特。该设备是同类设备中第一个仅使用光来控制超导量子比特的 设备。 来源：内容 编译自 scitechdaily ，谢谢。 哈佛大学的科学家开发出了一种 ...

鱼羊 一水 发自 凹非寺 量子位 | 公众号 QbitAI 我们正在进入AI创新的「中国时间」 。 2025第一季度刚刚过完，中国大模型"国产之光"已经可以预定一个年度关键词了。 从DeepSeek走红全网，到Manus一夜爆火，再到宇树为代表的机器人让中外网友连连惊呼…… 毫无疑问，中国前沿科技，正在2025年成为全世界热议和肯定的焦点。 △ LeCun评DeepSeek 但问题是：为什么是2025？ 以ChatGPT为起点的新一轮技术风暴刚刚卷到第三年，时间不算长，但对于风暴眼里的人们来说，信息量却早已爆炸。 更重要的是，随着大模型变革迎来新的转向，即关注点由训练向推理的迈进，新的机会伴随着挑战，正在不断涌现。密集突破，正在当下发 生。 所以现在，又来到了一个值得好好复盘，进而展望未来的时刻。 如果你需要一份「全面」、「硬核」的科技报告作为参考 ，这份 全新出炉的全景式科技报告，值得一读： 报告来自诺安基金，一家长期陪伴中国科技成长的千亿公募基金。 自2003年成立以来，累计为740家科技企业提供IPO募资支持，产品持有 新质生产力企业发行的股票市值合计278亿元。可谓是真懂硬科技，真懂中国创新。 而且这 ...

Core Viewpoint - Quantum and photonic computing possess significant computational advantages over traditional computing, especially in the context of the exponential growth in computational reasoning demands driven by AI. The commercialization of quantum computing is expected to accelerate with advancements from leading global companies like Google and IBM, as well as domestic innovations such as Wukong, Nine Chapters No. 3, and Zu Chongzhi No. 3 [1][3][4]. Group 1: Quantum and Photonic Computing Advantages - Quantum computing utilizes quantum bits (qubits) and can achieve exponential speedup over classical computers in specific problems, such as large number factorization and quantum chemistry simulations. For instance, Google's Willow chip, equipped with 53 qubits, can compute in a dimension of 2^53 [3][11]. - Photonic computing offers higher information capacity, efficiency, and parallelism compared to traditional electronic computing, making it advantageous for solving complex problems [3][14]. Group 2: Technological Pathways - Various technological pathways for quantum and photonic computing are rapidly evolving, including superconducting quantum computing, photonic computing, ion traps, neutral atoms, semiconductors, and topological computing. Superconducting quantum computing is currently the most mainstream approach, with products from companies like IBM and Google [4][18]. - The development of quantum computing technologies is characterized by a competitive landscape, with significant advancements in superconducting, ion trap, and photonic technologies [18][19]. Group 3: Industry Developments and Collaborations - NVIDIA has launched a "Quantum Day" at its GTC conference, inviting CEOs from 12 quantum computing companies to discuss advancements and applications of quantum technology in AI. NVIDIA also announced the establishment of a quantum computing research lab in Boston, collaborating with top universities [3][7][9]. - Major companies like Google, IBM, and Microsoft are making significant strides in quantum computing, with Google focusing on superconducting quantum computing and recently introducing the Willow chip with 105 qubits [40][41][47][48]. Group 4: Domestic Innovations - The "Zu Chongzhi No. 3" quantum computer developed by the University of Science and Technology of China has achieved 105 qubits, demonstrating high fidelity in quantum operations [54]. - The "Nine Chapters" series, led by the University of Science and Technology of China, has made significant advancements in photonic quantum computing, with the latest prototype achieving control over 255 photons, setting a new record in quantum computing superiority [56].

导语： 亚马逊揭开微软量子计算"突破"的面纱，直指其过度营销与技术现实的落差。 2025 年 2 月 19 日，微软宣布了一项所谓的重大突破：其最新量子处理器"Majorana 1" 采用了一种 全新的架构，据称可以存储更多数据并执行更复杂的计算。然而，作为竞争对手的亚马逊却对此持 谨慎态度。 在微软发布公告当天，亚马逊量子技术主管 西蒙·塞韦里尼（Simone Severini） 便通过电子邮件向 亚马逊首席执行官 安迪·贾西（AndyJassy） 发表了质疑。这封邮件被BI获得并曝光。 塞韦里尼在信中指出，微软在《自然》（Nature）期刊上发表的研究论文实际上"并未真正证明"这 款芯片的性能。他表示，该论文仅表明该处理器"可能在未来的实验中发挥作用"，而非真正实现了 突破性的计算能力。 他承认微软的研究"可能是一个重要的技术进步"，但他强调，这与媒体所宣传的"突破"有很大区 别。此外，他还认为，微软所采用的拓扑量子比特（topological qubits）架构是否能真正提供性能 优势仍然存疑。 亚马逊内部对微软芯片冷嘲热讽 根据 BI 获取的亚马逊内部 Slack 聊天记录，该公司多名高管和员工对微软 ...