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我学者首次确证史前母系氏族存在
Ke Ji Ri Bao· 2025-06-06 01:10
Core Insights - The research confirms the existence of prehistoric matrilineal clans in the Dawenkou culture, based on high-resolution ancient DNA analysis, marking a significant breakthrough in understanding early human social structures [1][2]. Group 1: Research Findings - The study utilized ancient DNA sequencing techniques to analyze burial sites at the Fujia site, revealing a strong correlation between burial zones and maternal genetic traits [2]. - All individuals from the northern burial area belonged to the mtDNA haplogroup M8a3, showing complete consistency in mitochondrial DNA sequences, while 95.65% of individuals from the southern area belonged to haplogroup D5b1b, also exhibiting identical mtDNA characteristics [2]. - The findings suggest that the two burial areas originated from distinct maternal ancestors, indicating a matrilineal social structure characterized by low maternal genetic diversity and high paternal genetic diversity [2]. Group 2: Implications for Academic Research - This research establishes the first systematic genetic model of a Neolithic matrilineal society, contributing significantly to the global academic discourse on human civilization [3].
【科技日报】彭桓武:专门写纸条请年轻人为自己的论文把关
Ke Ji Ri Bao· 2025-06-06 01:09
Core Insights - The article highlights the importance of academic integrity and the courage to acknowledge mistakes in scientific research, as demonstrated by the interaction between Sun Changpu and Peng Huanwu [2][3]. Group 1: Contributions of Peng Huanwu - Peng Huanwu, a renowned theoretical physicist, made significant contributions to China's atomic energy science, particularly in the research and theoretical design of the first generation of atomic and hydrogen bombs [2]. - He received numerous prestigious awards, including the National Natural Science Award (First Class) in 1982 and the Two Bombs and One Satellite Meritorious Medal in 1999 [2]. Group 2: Academic Integrity and Collaboration - Sun Changpu, after discovering an error in Peng Huanwu's paper on quantum Brownian motion, was encouraged by Yang Zhenning to address the issue directly with Peng [3]. - Peng Huanwu's response to Sun's concerns was commendable; he invited Sun to present an academic report and acknowledged the mistake in his paper, emphasizing the shared responsibility of authors and reviewers [3]. - This incident illustrates the necessity of humility and the willingness to correct errors in the pursuit of scientific truth, which is essential for the advancement of knowledge [3].
新一代视觉假体有望让失明者重见光明
Ke Ji Ri Bao· 2025-06-05 23:51
Core Viewpoint - The development of the world's first wide-spectrum visual prosthesis by a collaborative team from Fudan University and the Chinese Academy of Sciences marks a significant advancement in restoring vision and extending sensory capabilities beyond natural limits [1][2]. Group 1: Technology Development - The visual prosthesis allows blind animal models to regain visible light vision and perceive infrared light, achieving "super vision" capabilities [1]. - The device utilizes a tellurium nanowire network (TeNWNs) that has the highest known photogenerated current density, enabling the widest spectral coverage for visual reconstruction [1]. - The prosthesis is thin and can directly replace degenerated photoreceptor cells, activating retinal neurons and transmitting signals through natural pathways without external devices [1]. Group 2: Experimental Validation - The effectiveness of the prosthesis was validated in non-human primates, specifically in crab-eating macaques, showing no adverse rejection reactions after six months of implantation [2]. - The research team is investigating the efficient coupling mechanism between the visual prosthesis and the retina, which is crucial for future clinical applications [2]. Group 3: Future Implications - The new generation of super-visual prosthesis technology has the potential to not only restore sight to the blind but also to expand human sensory perception beyond natural limits [2].
我国建成全球规模最大互联网办电服务体系
Ke Ji Ri Bao· 2025-06-05 23:47
Core Viewpoint - The Chinese government is enhancing the "power access" service level to create a modern electricity business environment, achieving significant improvements in efficiency and user experience [1][2]. Group 1: Service Improvements - China has established the world's largest internet-based electricity service system, with an efficient and convenient service model that is information-based, networked, and intelligent [1]. - All provinces have achieved interconnectivity between government platforms and electricity supply companies' power application systems, enabling smart services like "face recognition for residents" and "one certificate for enterprises" [1]. - The State Grid and Southern Power Grid have developed comprehensive online service channels, including online business halls and mobile apps, with over 400 million registered users and an online processing rate exceeding 97% [1]. Group 2: Cost and Time Savings - The government has implemented reforms allowing residents and low-voltage small enterprises (under 160 kW) to connect to electricity without any upfront costs, saving users approximately 60 billion yuan annually over the past five years [1]. - The service has achieved "three zeros" for low-voltage users (zero visits, zero approvals, zero investment) and "three savings" for high-voltage users (savings in time, effort, and cost), cumulatively saving over 300 billion yuan in investment and reducing processing time by over 40% [2]. - The overall electricity service capability is improving, facilitating a historic transition for 1.4 billion people from merely "using electricity" to "using electricity well" [2].
科学家合成新核素镤-210
Ke Ji Ri Bao· 2025-06-05 23:46
研究团队利用中国超重元素研究加速器装置提供的钙-40束流轰击镥-175靶,通过熔合蒸发反应,在新 一代充气反冲核谱仪上成功合成了新核素镤-210,并测量了该核素的α衰变能量和半衰期。结合已有实 验数据,团队拓展了重核区质子滴线附近核素α衰变性质的系统性,并检验了理论模型对远离稳定线原 子核性质的预言。 中国科学院近代物理研究所研究员马龙介绍,尽管镤-210的合成截面仅约7皮巴(1皮巴=10-26平方厘 米),但得益于中国超重元素研究加速器装置提供的高品质束流,团队成功观测到23个事件。这验证了 该装置在极低反应截面条件下合成与探测目标核的能力,为我国新元素合成研究积累了经验。 记者5日从中国科学院近代物理研究所获悉,该所甘再国研究员团队与合作者利用兰州重离子加速器国 家实验室加速器装置,首次合成了目前已知最缺中子的镤同位素——新核素镤-210。相关研究成果发表 在《自然·通讯》上。 原子核是由质子和中子组成的量子多体系统,不同数量的质子和中子构成了不同的核素。自然界中存在 约288种稳定核素,它们分布在核素图中狭长的稳定线附近。然而,当原子核远离稳定线时,其稳定性 降低,会表现出α衰变、β衰变、自发裂变等衰变 ...
既要“飞起来”,又要“飞得稳”——四川多措并举促低空经济乘势高飞
Ke Ji Ri Bao· 2025-06-05 11:53
Core Viewpoint - Sichuan province is actively promoting low-altitude economic development through extensive reforms and initiatives, aiming to maximize the utilization of low-altitude airspace and enhance safety and efficiency in operations [1][2][3]. Group 1: Low-altitude Airspace Management - Sichuan has planned over 400,000 square kilometers of reportable airspace to release low-altitude resources [1]. - The province transitioned from an "approval system" to a "reporting system" for airspace management, allowing drone operators to report only one hour before takeoff [2]. - The trial airspace in Sichuan has expanded from 7,800 square kilometers in 2017 to nearly 80,000 square kilometers by 2025, with expectations for full coverage across 21 cities by the end of 2026 [3]. Group 2: Development of Low-altitude Economic Applications - Eight new low-altitude transport routes were announced, including four manned routes and two cargo routes for both manned and unmanned aircraft [4]. - The province is establishing a joint investment mechanism to promote various low-altitude applications, including passenger transport and drone logistics [4]. - The introduction of a "cherry route" using drones for transporting fresh produce has increased farmers' income by approximately 20% [5]. Group 3: Infrastructure and Future Plans - Sichuan plans to accelerate the construction of general airports and enhance the functionality of transport airports to improve low-altitude infrastructure [5]. - The province aims to strengthen policy support and service for the low-altitude economy, focusing on high-quality development and nurturing leading enterprises [5].
西藏加速建设智慧通关体系
Ke Ji Ri Bao· 2025-06-05 11:46
在西藏,智慧通关体系加速建设,西藏外贸从"人力跑腿"向"数据跑路"加速进化。 吉隆口岸新能源汽车专用通道前,扫描枪掠过车身车辆识别代码,3秒完成信息核验。"我们开发了 车辆特征数据库,非侵入式查验替代开箱检查。"吉隆海关关员介绍。 科技日报记者 杨宇航 日前,在日喀则国际陆地港智能监控屏前,小元(日喀则)实业有限公司负责人轻点鼠标,一批新 能源汽车的通关状态实时跃现。该负责人介绍:"过去通关需辗转数日,如今当天转关。"通关速度的提 升得益于西藏创新构建的"区岸联动"智慧通关体系——依托物联网设备与数据协同平台,现代化查验场 将报关、查验、转运等全流程压缩至24小时内。 当满载日用百货的货车驶入日喀则国际陆地港查验区,智能闸机自动识别车牌,货物信息同步传输 至海关系统。"按照传统模式,企业人员需反复跑多个部门,现在一站式搞定。"日喀则市商务局口岸科 负责人李春指着电子调度屏介绍,智能预约系统与自动化查验设备使日喀则国际陆地港查验区的单日处 理能力达300车。自治区商务厅口岸处工作人员顾培补充道:"场站内嵌的智能分拣系统和远程验核平 台,使60票货物实现零滞留通关。"数据印证成效:首批1022吨货物通关耗时较旧模 ...
技术破壁,人与AI共创科幻未来
Ke Ji Ri Bao· 2025-06-05 06:12
Core Insights - The first AIGC-produced sci-fi short drama based on the Nebula Award-winning work "When the Sun Falls" has gained significant attention on Douyin, showcasing the potential of AI in content creation and visual effects [1] - The success of this short drama highlights the evolution of Chinese sci-fi literature from niche to mainstream, driven by awards like the Global Chinese Science Fiction Nebula Award, which has recognized numerous outstanding works and authors over the past 16 years [1][2] - The integration of AIGC technology is revolutionizing the sci-fi film and television production landscape, allowing for more efficient and cost-effective creation of high-quality visual content [4][5] Industry Development - Chinese sci-fi literature has its roots in the late Qing and Republican eras, with early works paving the way for future narratives and themes [2] - The establishment of the Global Chinese Science Fiction Nebula Award in 2010 has significantly contributed to the recognition and proliferation of new generation authors, leading to a resurgence in interest in Chinese sci-fi, exemplified by the success of "The Three-Body Problem" [2] - AIGC technology has drastically reduced production time and costs, with the recent short drama being produced in just three months at less than one-fifth of traditional production costs [4][5] Market Trends - The Chinese sci-fi industry is experiencing unprecedented growth, with projections indicating total revenue will reach 108.96 billion yuan in 2024, marking two consecutive years of surpassing the 100 billion yuan threshold [6] - The rise of AI technology is not only enhancing literary creation but also expanding into audio production, leading to a diverse range of sci-fi content including novels, comics, and audio dramas [6] - The industry is evolving towards a more integrated ecosystem, focusing on discovering quality topics and maximizing the value of classic IPs through data analysis and cross-industry collaboration [6]
终结塑料污染,中国在行动!
Ke Ji Ri Bao· 2025-06-05 03:36
Core Viewpoint - The article emphasizes China's significant role in combating plastic pollution, highlighting the country's comprehensive governance system and innovative practices aimed at reducing plastic waste and promoting recycling [1][2][3]. Group 1: Governance and Policies - China has established a "legal-policy-standard" governance system for plastic pollution control, with recent documents like the "Opinions on Further Strengthening Plastic Pollution Control" and the "14th Five-Year Plan for Plastic Pollution Control" expanding the scope of governance to include e-commerce and takeout services [1][2]. - The implementation of "extended producer responsibility" in regions like Shanghai has led to a 20% reduction in packaging waste for participating companies [2]. Group 2: Current Situation and Challenges - In 2023, China generated approximately 62 million tons of plastic waste, with a recycling volume of about 19 million tons, reflecting a 5.6% increase from 2022, but the recycling rate remains low at around 30% [3]. - The express delivery and takeout industries are identified as major sources of plastic pollution, with one delivery platform generating 1.6 million tons of plastic waste from 17 billion orders [3]. Group 3: Technological Innovations - Significant advancements in chemical recycling technologies have been made, such as the "one-step" catalytic cracking process developed by Guangdong Dongyue Chemical Technology Co., which can convert mixed plastic waste into high-value chemical raw materials with minimal environmental impact [5]. - Digital technologies, including blockchain and big data, have enhanced the efficiency of plastic waste management, enabling a transparent and traceable recycling process that benefits both collectors and businesses [6]. Group 4: Public Participation and Awareness - Public involvement is crucial for effective plastic pollution management, with various strategies suggested for reducing plastic consumption, such as using reusable bags and supporting products made from recycled materials [7]. - Community initiatives, such as educational workshops and distribution of guidelines for reducing plastic use, are essential for raising awareness and promoting sustainable practices among consumers [7].
“美丽城市”示范 “美丽经济”繁荣
Ke Ji Ri Bao· 2025-06-05 02:20
Group 1 - The core theme of the news is the promotion of "Beautiful China" initiatives across various provinces, focusing on ecological protection and sustainable development [1][2][3][4] - Qinghai has established a natural protection system with 39.16% of its land area designated for ecological conservation, achieving 100% excellent water quality in national assessment sections [2][3] - Sichuan is implementing the "Beautiful Sichuan" initiative, targeting improvements in air and water quality, with a goal of reducing PM2.5 concentration below 30 micrograms per cubic meter by 2024, a 10.2% year-on-year decrease [3][4] Group 2 - Qingdao has achieved significant air quality improvements, maintaining national secondary standards for five consecutive years, and has implemented a "Bay Long System" to ensure 99% of nearshore water quality is excellent [4] - Guangzhou is innovating in financing models for "Beautiful City" projects, with a project library containing 28 initiatives and over 17.42 billion yuan in financing secured for various projects [4]