Ke Ji Ri Bao
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华中科技大学“月壤砖”完成首年太空考验
Ke Ji Ri Bao· 2025-11-19 06:59
Core Insights - The first simulated lunar soil sintered brick was showcased in China, marking a significant breakthrough in aerospace construction technology [1] - The lunar bricks were sent to space aboard the Tianzhou-8 cargo spacecraft for an outdoor exposure experiment, demonstrating the application of classroom technology in space [1] - The first batch of lunar bricks returned to Earth after a year of exposure in space, showing promising results for future lunar construction [1][2] Group 1 - The simulated lunar bricks were developed by a team led by Academician Ding Lieyun from Huazhong University of Science and Technology, utilizing real lunar soil components to create the material [1][2] - The bricks have a density comparable to ordinary bricks but possess over three times the compressive strength, indicating their potential for stable service in extreme lunar environments [1] - The first batch of returned samples consists of 74 small bricks, weighing approximately 1000 grams in total, with each brick weighing around 10 grams [2] Group 2 - The research team plans to conduct a three-year long-term testing experiment, with annual sample returns to analyze the performance of the lunar bricks in space [2] - The innovative approach proposed by the team involves using lunar solar energy to sinter lunar soil into bricks, which can be assembled on-site by robots, significantly reducing transportation costs [2] - The analysis of the returned samples will provide scientific evidence for predicting the long-term service behavior of lunar bricks on the moon [2]
新一代聚变装置等离子体压力创纪录
Ke Ji Ri Bao· 2025-11-19 06:59
Core Insights - Zap Energy announced a significant achievement in its latest fusion energy technology, the "Fusion Z-Pinch Experiment 3" (FuZE-3), reaching an electron pressure of 830 MPa, corresponding to a total plasma pressure of approximately 1.6 GPa, setting a new record for shear flow-stabilized Z-pinch devices [1] Group 1: Technical Achievements - The achievement of high pressure is crucial for controlled nuclear fusion, as higher pressure leads to more frequent fusion reactions, moving closer to the goal of energy output exceeding input [1] - The team utilized "optical Thomson scattering" technology to measure the plasma electron pressure, which is approximately double the total pressure due to contributions from both electrons and ions [1] - The high-pressure state achieved can be maintained for about 1 microsecond [1] Group 2: Experimental Data - In the recent FuZE-3 experiments, repeated discharge measurements showed electron density ranging from 3×10^24 m^-3 to 5×10^24 m^-3, with electron temperatures exceeding 1 keV (approximately 11.67 million degrees Celsius) [1] - The design goal of the FuZE-3 is to reach new heights in the "triple product" (density × temperature × confinement time), which is a critical indicator of fusion performance [1]
【科技日报】江门中微子实验看透“幽灵粒子”
Ke Ji Ri Bao· 2025-11-19 06:03
Core Insights - The Jiangmen Underground Neutrino Observatory (JUNO) has successfully completed its construction and released its first physical results, achieving a measurement precision of 1.5 to 1.8 times better than previous best results for two key solar neutrino oscillation parameters [2][3] Group 1: Scientific Objectives - JUNO aims to determine the mass ordering of three types of neutrinos: electron neutrinos, muon neutrinos, and tau neutrinos, which is a fundamental question in neutrino physics [3] - The observatory will also conduct precise measurements of neutrino oscillation parameters and cross-research on solar neutrinos, terrestrial neutrinos, supernova neutrinos, atmospheric neutrinos, and proton decay [3] Group 2: Significance for Humanity - Neutrinos are linked to the origins of the universe and play a crucial role in determining the conditions necessary for the existence of matter [4][5] - The study of neutrinos is a pure exploration of natural laws, with potential long-term value that is currently unpredictable, similar to the early days of electricity [5] Group 3: Importance of Precision Measurement - Accurate measurements of neutrino oscillation parameters are essential for addressing fundamental mysteries in physics, such as whether neutrinos are their own antiparticles [6] - The recent results from JUNO significantly improve the measurement precision of solar neutrino oscillation parameters, which may clarify discrepancies in previous measurements and could indicate new physics [6]
驭风于天!高空风力发电开辟风能利用新疆界
Ke Ji Ri Bao· 2025-11-19 02:30
Core Viewpoint - The successful trial of the world's largest 5000 square meter high-altitude wind energy capturing parachute marks a significant step in the engineering application of high-altitude wind power generation technology in China [1] Group 1: High-altitude Wind Power Technology - High-altitude wind power generation utilizes airborne components tethered to capture wind energy above 300 meters, converting it into electrical energy [1][3] - The technology involves a three-tier energy transfer path: airborne energy capture, cable energy transmission, and ground power generation [1][2] - The airborne system is supported by a helium balloon and utilizes a working parachute to capture wind energy, with a cable made of ultra-high molecular polyethylene capable of withstanding hundreds of tons of tension [1][2] Group 2: Advantages and Opportunities - Traditional wind power faces limitations due to the scarcity of high-quality wind fields and the intermittent nature of wind, which challenges grid stability [3] - High-altitude wind energy, located between 300 to 10,000 meters, offers a rich and underutilized resource with theoretical reserves exceeding global electricity consumption by over 100 times [3] - High-altitude wind energy has advantages such as increased energy density, stable wind direction and speed, and widespread global distribution, providing potential solutions for new power system stability and peak-shaving needs [3] Group 3: Commercialization and Application Scenarios - The first engineering trial project for high-altitude wind energy generation in China, located in Anhui, has a total installed capacity at the megawatt level, utilizing wind energy from 300 to 3000 meters [4] - The parachute-based land-based high-altitude wind power generation technology shows significant commercial potential and application flexibility, supporting various deployment schemes [4][5] - Potential applications include deployment in wind-rich areas, off-grid power supply for remote locations, emergency support in urban areas, and complementing other energy sources like thermal and solar power [5]
多项网间电力灵活互济工程获核准
Ke Ji Ri Bao· 2025-11-19 00:44
Core Viewpoint - The approval of the Xiangqian, Xiangyue, and Yuchuan flexible interconnection power projects will significantly enhance the power transmission capacity between the Southern Power Grid and the State Grid, with a total investment exceeding 15.6 billion yuan and a maximum transmission capacity of 9 million kilowatts by 2027 [1][2]. Group 1 - The three projects are set to start construction by the end of this year and are expected to be operational before the summer peak in 2027, increasing the number of transmission channels between the Southern Power Grid and the State Grid from 2 to 5 [1]. - Each of the three projects will involve the construction of a 3 million kilowatt flexible DC back-to-back converter station in Guizhou, Hunan, and Chongqing, along with related line construction to enhance interconnectivity [1][2]. - The projects will provide a solid physical foundation for normalized electricity trading between interconnected regions, supporting high-quality economic and social development and green energy demands [1]. Group 2 - The Xiangqian project will enable peak-shaving interconnection between Hunan, which experiences high electricity load in summer, and Guizhou, which has a "winter high, summer low" load characteristic, thus enhancing power supply security and renewable energy absorption [2]. - In case of extreme weather events, such as high temperatures or severe cold, the Xiangqian project will allow for emergency power support from the opposite side, significantly improving the grid's disaster response capability [2]. - The Southern Power Grid and the State Grid will enhance collaboration and resource investment to ensure high-quality construction and operation of the projects, accelerating the development of a new energy system and power structure [2].
猪肾移植人体详细免疫反应图谱发布
Ke Ji Ri Bao· 2025-11-19 00:18
Core Insights - The studies published in the latest issue of "Nature" detail the immune response following the transplantation of genetically modified pig kidneys into a brain-dead patient model, identifying key factors and potential biomarkers that contribute to xenotransplantation failure [1] Group 1: Xenotransplantation Research - Xenotransplantation is viewed as a potential solution to the shortage of organ donors for patients with end-stage organ failure [1] - The research highlights that organ rejection is a common complication in all types of transplants, with limited understanding of the immune response involved in xenotransplantation [1] Group 2: Study Findings - The research team from NYU Langone Health successfully maintained the function of the transplanted pig kidney for 61 days despite experiencing two rejection episodes, which were treated effectively with existing therapies [1] - The studies identified key mobilization pathways of immune cells in response to the transplant and created a genomic map related to these responses [1] Group 3: Future Implications - The detailed immune response map provided by these studies offers critical insights that could enhance the long-term success rates of xenotransplantation in future research [1]
轻质高强复合材料可耐500℃高温
Ke Ji Ri Bao· 2025-11-19 00:18
Core Viewpoint - A research team from the University of Toronto has developed a new composite material that maintains lightweight and high strength characteristics at high temperatures (up to 500°C), showing potential applications in the aerospace industry [1]. Group 1: Material Characteristics - The new material utilizes a titanium alloy mesh structure as a "reinforcement skeleton" and is filled with an aluminum-silicon-magnesium alloy as a "cement matrix" through micro-casting technology, incorporating nano-scale precipitated particles for enhanced performance [1]. - Compared to traditional aluminum alloys, which soften at high temperatures (with a strength of only about 5 MPa at 500°C), the new material exhibits impressive performance, maintaining a strength of 300-400 MPa at 500°C, comparable to mid-grade steel, while being two-thirds lighter [1]. - The yield strength of the new material reaches 700 MPa at room temperature, indicating its robustness under stress [1]. Group 2: Technological Innovation - The research team employed computer simulations to discover that the new material maintains its strength at high temperatures through a unique deformation mechanism known as "enhanced twinning" [1]. - This breakthrough highlights the innovative potential of additive manufacturing technology, paving the way for the development of lighter, stronger, and more energy-efficient transportation tools [1].
韩称半数主力出口产业竞争力被中国赶超
Ke Ji Ri Bao· 2025-11-19 00:05
Core Insights - The report from the Korea Economic Association indicates that half of South Korea's top ten export industries have been surpassed by China in terms of competitiveness, with a prediction that all ten industries may fall behind China in five years [1][2] - A survey of 200 major companies in these industries revealed that 62.5% view China as their biggest competitor, with this figure expected to rise to 68.5% by 2030 [1] - The competitiveness index set by the surveyed companies ranks South Korea at 100, while China and the US are projected to surpass South Korea by 2030, with indices of 112.3 and 112.9 respectively [1] Industry Competitiveness - In specific sectors, Chinese companies lead in steel (112.7), general machinery (108.5), secondary batteries (108.4), displays (106.4), and automotive parts (102.4) [2] - South Korean companies still maintain an edge in semiconductors (99.3), electronics and electrical machinery (99), shipbuilding (96.7), petrochemicals and petroleum products (96.5), and biopharmaceuticals (89.2) [2] - The report highlights that China holds advantages in price competitiveness, production capacity, and government support, while South Korea only leads in brand competitiveness, which is expected to be overtaken in five years [2]
追踪超千亿颗恒星的银河系模型创建
Ke Ji Ri Bao· 2025-11-19 00:05
Core Insights - An international team from Japan's RIKEN, the University of Tokyo, and the University of Barcelona has developed the first galaxy model capable of tracking the evolution of over 100 billion stars, achieving a scale 100 times greater than previous models [1][2] - Traditional models were limited to simulating systems of up to 1 billion solar masses, while the Milky Way contains over 100 billion stars, leading to challenges in accurately representing astronomical events [1] - The new model combines deep learning with traditional physical simulations, allowing for significant reductions in computation time for simulating the evolution of the galaxy [2] Summary by Sections - **Model Development** - The new galaxy model can track the evolution of over 100 billion stars, surpassing previous models by a factor of 100 [1] - Previous models could only simulate systems up to 1 billion solar masses, which limited their accuracy in representing the Milky Way [1] - **Computational Efficiency** - The new approach reduces the time required for simulating a million years of evolution to just 2.78 hours, and a billion years to 115 days [2] - Traditional simulations required 315 hours for a million years and 36 years for a billion years, highlighting the efficiency of the new model [1][2] - **Technological Innovation** - The integration of deep learning with traditional simulations marks a significant advancement, moving beyond mere pattern recognition to becoming a genuine scientific discovery tool [2] - The AI system was trained on high-resolution supernova simulation data to predict the movement of interstellar gas following supernova explosions [1]
迈向能量增益的重要一步 新一代聚变装置等离子体压力创纪录
Ke Ji Ri Bao· 2025-11-18 23:59
Group 1 - Zap Energy announced its latest "Fusion Z-Pinch Experiment 3" (FuZE-3) achieved an electron pressure of up to 830 MPa, corresponding to a total plasma pressure of approximately 1.6 GPa, setting a new record for shear flow-stabilized Z-pinch devices [1] - The pressure is a key indicator reflecting the temperature and density of plasma, with higher pressure leading to more frequent fusion reactions, moving closer to the goal of energy output exceeding input [1] - The team utilized "optical Thomson scattering" technology to measure the plasma electron pressure, which is approximately double the total pressure due to contributions from both electrons and ions [1] Group 2 - In the recent FuZE-3 experiment, repeated discharge measurements showed electron density ranging from 3×10^24 m^-3 to 5×10^24 m^-3, with electron temperatures exceeding 1 keV (approximately 11.67 million degrees Celsius) [2] - FuZE-3 aims to achieve new heights in the "triple product" (density × temperature × confinement time), which is a crucial indicator of fusion performance [2]