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由 150 余名神经科学家参与的“大脑皮层网络机器智能”（MICrONS）项目发表十篇论文，公布了迄今最详尽的哺乳动物大脑连接图谱。根据一粒沙大小的脑区就能绘制神经元连接、形态与功能图谱不仅是一项科学奇迹，更是迈向理解思维、情感和意识神秘起源的关键一步。美国贝勒医学院科学家首先利用专门的显微镜，记录了小鼠视觉皮层一立方毫米区域在观看各种电影和视频片段时的大脑活动。随后，艾伦研究所的研究人员取下这一立方毫米的大脑组织，将其切成25000多层，每层厚度仅为人类发丝的1/400，并使用一系列电子显微镜对每一层进行高分辨率成像。最后，普林斯顿大学的另一个团队利用人工智能和机器学习技术，将这些细胞和连接重建为三维图像。结合大脑活动记录，研究团队绘制出迄今最大的大脑连接图谱和功能图谱，其中包含20多万个细胞、4公里长的轴突（延伸至其他细胞的分支）以及5.23亿个突触（细胞间的连接点）。该连接图谱及其数据现可通过 MICrONS Explorer 免费获取。其数据量达1.6拍字节。 Nature：Biggest brain map ever details huge number of neurons and their activity 科技日报：哺乳动物大脑最详连接图谱绘成
由 150 余名神经科学家参与的“大脑皮层网络机器智能”（MICrONS）项目发表十篇论文，公布了迄今最详尽的哺乳动物大脑连接图谱。根据一粒沙大小的脑区就能绘制神经元连接、形态与功能图谱不仅是一项科学奇迹，更是迈向理解思维、情感和意识神秘起源的关键一步。美国贝勒医学院科学家首先利用专门的显微镜，记录了小鼠视觉皮层一立方毫米区域在观看各种电影和视频片段时的大脑活动。随后，艾伦研究所的研究人员取下这一立方毫米的大脑组织，将其切成25000多层，每层厚度仅为人类发丝的1/400，并使用一系列电子显微镜对每一层进行高分辨率成像。最后，普林斯顿大学的另一个团队利用人工智能和机器学习技术，将这些细胞和连接重建为三维图像。结合大脑活动记录，研究团队绘制出迄今最大的大脑连接图谱和功能图谱，其中包含20多万个细胞、4公里长的轴突（延伸至其他细胞的分支）以及5.23亿个突触（细胞间的连接点）。该连接图谱及其数据现可通过 MICrONS Explorer 免费获取。其数据量达1.6拍字节。 Nature：Biggest brain map ever details huge number of neurons and their activity 科技日报：哺乳动物大脑最详连接图谱绘成
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Bitcoin is a decentralized digital currency that you can buy, sell and exchange directly, without an intermediary like a bank. Bitcoin’s creator, Satoshi Nakamoto, originally described the need for “an electronic payment system based on cryptographic proof instead of trust.” Each and every Bitcoin transaction that’s ever been made exists on a public ledger accessible to everyone, making transactions hard to reverse and difficult to fake. That’s by design: Core to their decentralized nature, Bitcoins aren’t backed by the government or any issuing institution, and there’s nothing to guarantee their value besides the proof baked in the heart of the system. “The reason why it’s worth money is simply because we, as people, decided it has value—same as gold,” says Anton Mozgovoy, co-founder & CEO of digital financial service company Holyheld.
The messaging service and social-media platform owes creditors roughly $700 million by the end of April, according to people briefed on the company’s plans and loan documents viewed by The Wall Street Journal. At the same time, Telegram Group Inc. must cover rising equipment and bandwidth expenses because of its rapid growth, despite going years without attempting to generate revenue.
