Ke Ji Ri Bao
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力箭一号“一箭七星”发射成功
Ke Ji Ri Bao· 2025-08-20 01:33
Core Points - Zhongke Aerospace successfully launched the Lijian-1 Yao-10 rocket, deploying seven satellites into orbit, marking a significant achievement in commercial space endeavors [1][2] - The Zhongke Satellite 05, equipped with advanced X-band synthetic aperture radar (SAR), offers high-resolution imaging capabilities and extensive observation coverage [1] - The ThumbSat-1 and ThumbSat-2 satellites are part of a collaborative project aimed at promoting affordable and accessible space technology, enhancing international cooperation between China and Mexico [2] Group 1 - The Lijian-1 Yao-10 rocket, named "China Women's No.," completed its eighth flight, successfully placing 70 satellites into orbit with a total payload exceeding 7 tons [2] - The Zhongke Satellite 05 features a resolution better than 1 meter and a maximum observation width exceeding 300 kilometers, supporting various operational modes [1] - The project involving ThumbSat satellites represents a breakthrough in satellite integration between China and Mexico, facilitating low-threshold solutions for international collaboration in science and education [2] Group 2 - The Lijian-1 rocket is expected to enhance its capabilities, with future missions planned to deploy over 50 satellites in a single launch [2] - The Zhongke Satellite 05 integrates intelligent on-orbit processing modules for high-quality imaging and data extraction, particularly useful in wide-area observation scenarios [1] - The collaboration between Zhongke Aerospace and China Women's Magazine signifies a cross-industry partnership aimed at advancing space technology [2]
数智画笔点染藏式建筑彩绘新图景
Ke Ji Ri Bao· 2025-08-20 01:33
Core Viewpoint - The integration of traditional Tibetan architectural painting with modern digital technology is being pursued to preserve and revitalize this ancient art form, showcasing its cultural significance and enhancing accessibility for future generations [1][2]. Group 1: Cultural Significance - Huangnan Prefecture is renowned as the "hometown of Tibetan painting," with local art forms like Thangka and architectural painting recognized as part of UNESCO's intangible cultural heritage [2]. - The traditional Tibetan architectural painting features distinctive regional and cultural motifs, such as the Four Children Presenting Auspiciousness and the Cloud Dragon pattern, which reflect the rich heritage of the area [1]. Group 2: Digital Preservation Efforts - A collaboration between local artist Geng Deng and researchers from Qinghai Normal University aims to digitize Tibetan architectural paintings, combining traditional craftsmanship with modern technology [2][3]. - The research team is developing a comprehensive resource database using advanced technologies like 3D laser scanning and digital photography to collect and preserve architectural painting images [3]. Group 3: Technological Innovations - The team has created a high-resolution digital capture method to address challenges such as color fading and image distortion, allowing for the reconstruction of missing parts of the artwork [3]. - A coloring system has been developed that enables users to apply colors to line drawings easily, significantly lowering the entry barrier for beginners in the art form [4]. Group 4: Future Aspirations - The goal is to create a user-friendly platform where users can assemble architectural paintings using a library of design elements, akin to building blocks [5][6]. - The team is also working on virtual reality models to provide immersive experiences of Tibetan architectural art, enhancing public engagement and appreciation [6].
培育“中国芯” 传授“科技经”
Ke Ji Ri Bao· 2025-08-20 01:33
不过,求索之路并不好走。"这一过程像大海捞针,需要在庞大的牛基因组里找到控制重要经济性 状的关键位点。"昝林森回忆道。经过十年攻坚,团队终于让这颗芯片具备一次性精准检测数万个遗传 位点的能力,不仅让育种周期大幅缩短,还显著提升了选种准确率。"装上这颗'中国芯'后,黄牛育种 再也不用'凭经验、看长相',精准'优生优育'得以实现。"昝林森说。 "推动学科拔尖筑峰,提升基础学科能力,核心在于激发科技创新活力,产出'顶天立地'的成 果。"8月19日,在西北农林科技大学推进教育科技人才体制机制一体化改革交流会上,该校党委书记黄 思光的一席话,道出了该校科技强农的发展路径。 前不久,在西北农林科技大学动物科技学院的实验室里,由该校教授昝林森团队研发的"中国黄牛1 号"基因育种芯片正式发布。这颗凝聚了团队十年心血的"中国芯",正是学校深化体制机制改革结出的 硕果。该校通过体制机制改革构建起贯通创新链与产业链的转化网络,一批标志性创新成果不断涌现, 为农业强国建设注入澎湃动能。不仅如此,近年来,该校农业科学稳居ESI全球前1?,多个学科位居全 国前列…… 把核心育种技术攥在手里 面对我国肉牛育种核心种源和技术曾受制于人的困境 ...
人体细胞会通过变形修复伤口
Ke Ji Ri Bao· 2025-08-20 01:13
Core Insights - A new study published in "Nature Cell Biology" reveals that human cells can change their shape to close wound gaps, providing insights into cellular self-repair mechanisms and potential applications in wound healing and tissue regeneration [1] Group 1: Cellular Mechanisms - Epithelial cells, which cover internal and external surfaces of the body, play a crucial role in protecting against physical damage, pathogen invasion, and water loss [1] - The endoplasmic reticulum (ER) in epithelial cells alters its shape in response to wound curvature; it forms tubular structures at convex curves and flat sheet-like structures at concave curves [1] Group 2: Cellular Movement - The driving force at the edges of convex curves and the pulling force at concave curves change the shape of the endoplasmic reticulum through different mechanisms [1] - At the edges of convex cracks, cells extend flat membrane structures through "crawling" movements to fill the gap, while at concave edges, cells contract the edges through "tethering" movements, akin to tightening a rope to close the gap [1] Group 3: Role of Endoplasmic Reticulum - The endoplasmic reticulum reorganizes itself based on the curvature of the wound edges, influencing the migration patterns of epithelial cells, highlighting its critical role in cellular behavior [1]
在航天强国建设中书写“东极传奇”
Ke Ji Ri Bao· 2025-08-20 01:13
Core Viewpoint - Heilongjiang Province is striving to build a national-level aerospace industry cluster, with Jiamusi positioned as a leader in the construction of a strong aerospace nation [1] Group 1: Geographic and Industrial Advantages - Jiamusi is located at a strategic latitude, allowing it to receive up to 6.5 satellite signals daily, making it an ideal site for satellite ground stations [2] - The city has established itself as a northern node in the national measurement and control network, with significant projects like the 66-meter deep space detection station supporting major space missions [2] - Over the past two years, Jiamusi has launched 21 satellite industry projects with a total investment of 4.323 billion, and an additional 31 projects are in negotiation, exceeding 4 billion [2] Group 2: Policy Support and Development Initiatives - In June, Heilongjiang Province introduced policies to support high-quality development in the aerospace industry, promoting integrated development in research, manufacturing, and services [3] - Jiamusi has also implemented city-level policies to further solidify the foundation for industrial development with substantial financial support [3] Group 3: Collaborative Efforts and Economic Acceleration - The signing ceremony at the conference included agreements with companies for satellite measurement and control ground station construction, remote sensing data application platforms, and "Aerospace + Agriculture" initiatives [4] - A commercial measurement and control station project in Fuyuan City has been initiated, with a total investment of 120 million, marking a significant expansion of previous collaborations [4] - The collaboration between Harbin Institute of Technology and Jiamusi in satellite remote sensing and smart agriculture aims to create a full-chain ecosystem from technology research to industrial service [5]
破解人脑独特性的关键DNA片段发现
Ke Ji Ri Bao· 2025-08-20 01:13
研究团队将目光聚焦于人类基因组中一类特殊区域——人类加速区(HAR)。这些区域在人类进 化过程中积累了异常多的基因突变。他们推测,正是这些快速演变的HAR区域,帮助人类获得了区别 于其他灵长类动物的独特特征。 在众多HAR区域中,HAR123脱颖而出。研究表明,这个DNA片段实际上是一个转录增强子,能够 精确调控基因的开启程度和时间。具体而言,它既能促进神经祖细胞(产生神经元和神经胶质细胞的细 胞)的发育,又能调控神经元和神经胶质细胞的比例。这种精妙的调控机制,最终造就了人类独有 的"认知灵活性",即更新替代旧有知识的能力。 科技日报北京8月19日电 (记者刘霞)究竟是什么让人脑与众不同?美国加州大学圣迭戈分校研究 团队发现了一个名为HAR123的小型DNA片段,这将是解开人类大脑独特性之谜的关键。相关研究成果 发表于新一期《科学进展》杂志。 最新研究表明,HAR123并非普通基因,而是一个精妙的"大脑发育调控器"。它就像一位经验丰富 的指挥家,精确指导脑细胞的生成方式和比例分配。值得注意的是,人类版本的HAR123与黑猩猩的表 现大相径庭,这种差异可能赋予了人类更强大的思维和学习能力。 实验显示,在培养皿中 ...
多学科协同赋能石窟寺保护
Ke Ji Ri Bao· 2025-08-20 01:13
Core Viewpoint - The ongoing battle against water damage at the Dazu Rock Carvings has seen significant progress through multidisciplinary collaboration and advanced technology, leading to effective water damage management and preservation of cultural heritage [1][2]. Group 1: Water Damage Management - The Dazu Rock Carvings have faced severe threats from water damage, including rock instability and surface weathering, necessitating a comprehensive management approach [1]. - The team has successfully implemented a multi-disciplinary water damage management system, utilizing advanced techniques such as geological radar and high-density electrical methods to identify water sources and flow paths [1][2]. - The introduction of curtain grouting technology from hydropower engineering has effectively redirected underground water flow away from the rock carvings [1][2]. Group 2: Multidisciplinary Collaboration - The concept of "multidisciplinary collaboration" was emphasized at the forum, highlighting the need for various fields to work together in the protection of cultural heritage [3]. - The protection of the rock carvings involves a wide range of disciplines, including archaeological research, biological pest control, and structural reinforcement, demonstrating the complexity of the preservation efforts [3]. - The approach to heritage protection is evolving, focusing not only on the artifacts themselves but also on the surrounding environment and its interaction with the artifacts [3][4]. Group 3: Educational and Research Initiatives - The establishment of a large-scale physical simulation platform for cultural heritage allows for the testing of artifacts under extreme environmental conditions, showcasing the importance of research in preservation efforts [4]. - There is a call for educational institutions to provide interdisciplinary learning opportunities to cultivate talent in heritage protection, emphasizing the need for a blend of scientific and artistic knowledge [5]. - The international forum facilitated exchanges among experts from various countries, promoting the sharing of best practices and enhancing global efforts in cultural heritage preservation [5].
【科技日报】科研人员发现千叶蓍抗神经炎症关键成分
Ke Ji Ri Bao· 2025-08-20 01:08
中国科学院新疆理化技术研究所科研人员从新疆昌吉地区采集的千叶蓍全草中分离出16个倍半萜, 其中12个为新化合物。通过高分辨质谱、核磁共振波谱等方法,科研人员成功确定了这些化合物的平面 结构以及绝对构型。 记者8月18日从中国科学院新疆理化技术研究所获悉,该所资源化学研究室科研人员在对菊科蓍属 植物千叶蓍进行大量分析测试后发现,其倍半萜类成分具有抗神经炎症相关活性。这一发现为开发治疗 神经炎症疾病的相关天然先导化合物提供了坚实研究基础。相关研究成果近日发表于国际期刊《分子结 构杂志》。 据了解,千叶蓍在众多国家和地区被当作传统医药使用,可用于治疗胃肠疾病、肝胆疾病、高血 压、呼吸道感染、发热以及风湿性疾病等,还能促进伤口愈合,缓解皮肤炎症,具有良好的药用价值。 倍半萜类成分作为千叶蓍中的重要活性成分之一,因其结构丰富多样且活性优异,一直是天然药物化学 研究领域的热点,也是药物先导化合物研究的热门靶向化合物。 (原载于《科技日报》 2025-08-20 第06版) 图为千叶蓍。视觉中国供图 在进一步的研究中,科研人员利用脂多糖诱导的小胶质细胞模型,测试了化合物的抗神经炎症相关 活性。结果显示,有5个化合物可有效抑 ...
动物实验显示:电流重塑角膜技术能有效矫正视力
Ke Ji Ri Bao· 2025-08-20 00:36
研究人员此次探索的是一种名为"电—机械重塑"的方法,其原理是许多富含胶原蛋白的组织(包括角 膜)依靠带相反电荷分子的吸引力维持形态,当在组织中施加电流时,会改变其pH值,使这些分子间 的吸引力暂时减弱,从而让组织变得柔软可塑。当pH值恢复后,组织则固定在新形态上。 实验中,12只兔眼中有10只模拟了近视情况。结果显示,这些"近视眼"在处理后均达到了预设的聚焦效 果,意味着其恢复了清晰视力。同时,研究人员通过严格控制pH值梯度,确保角膜细胞在处理后仍能 存活。进一步实验还表明,该方法能逆转部分由化学损伤造成的角膜混浊,而这一病症目前只能通过角 膜移植治疗。 尽管初步成果令人鼓舞,但研究人员强调,实验仍处在非常早期的阶段。下一步,他们将测试该方法在 不同类型屈光不正(如远视和散光)中的适用性。 (文章来源:科技日报) 不少人选择通过LASIK等激光矫正技术矫正视力。但这种手术需切削角膜组织,存在一定风险。美国加 州大学尔湾分校研究人员正在探索一种通过电流重塑角膜,而不是切割角膜的"去激光化"视力矫正新技 术。相关成果18日在美国化学会秋季年会上公布。 在最新的实验中,研究人员制作了特殊的铂金"隐形眼镜"。它们既能 ...
应对万物互联趋势加剧和数据需求激增 “曲线球”系统可绕障传输超高频信号
Ke Ji Ri Bao· 2025-08-20 00:34
Core Viewpoint - Princeton University's research team has developed an innovative "curved wave" system capable of transmitting ultra-high frequency signals rapidly and stably, addressing the challenges posed by the increasing demand for data and the Internet of Things [1][2]. Group 1: Technology and Innovation - The new system utilizes a neural network to dynamically shape the transmission path of wireless signals, allowing them to bypass obstacles and maintain stable, high-speed communication [1]. - The technology focuses on the sub-terahertz frequency band, which has the potential to transmit ten times the data volume of current wireless systems, making it crucial for high-bandwidth applications such as virtual reality and fully autonomous vehicles [1]. - Traditional methods rely on external reflectors to navigate around obstacles, which are often unreliable or difficult to deploy in real-world scenarios [2]. Group 2: Methodology - The research team employs a special radio wave technology known as "Airy beams," which can propagate along curved trajectories rather than in straight lines, enabling effective transmission in non-line-of-sight conditions [2]. - A neural network is introduced to select and optimize the best curved path in real-time, similar to how professional basketball players make shooting decisions based on experience rather than complex calculations [2]. - A high-fidelity simulator was developed to allow the neural network to learn efficiently in a virtual environment, adapting to various obstacle layouts and dynamic changes [2]. Group 3: Future Implications - This work addresses a long-standing challenge in high-frequency wireless communication within dynamic environments, paving the way for future transmitters to intelligently navigate complex settings [2]. - The advancements in this technology are expected to support ultra-fast and highly reliable wireless connections for applications that are currently difficult to realize, such as immersive virtual reality and fully autonomous transportation [2].