Workflow
Ke Ji Ri Bao
icon
Search documents
科学家展示GKP量子比特通用逻辑门集
Ke Ji Ri Bao· 2025-08-24 23:33
Core Insights - The team from the University of Sydney's Nano Institute has successfully demonstrated a universal logic gate set for GKP quantum bits, significantly reducing the number of physical qubits required for computations, laying the groundwork for efficient quantum hardware information processing [1][2] Group 1: Quantum Computing Development - To build a usable large-scale quantum computer, it is essential to overcome errors that spontaneously occur in qubits during computations. Scientists typically use "logical qubits" to suppress these errors, but this approach requires a disproportionately high number of physical qubits, leading to exponential growth in hardware demands as scale increases, presenting an engineering challenge [1] - The GKP code translates continuous quantum oscillations into clean discrete states, making errors easier to identify and correct, thus encoding logical qubits in a more compact manner. For years, the GKP code remained theoretical due to its complexity, but this new research has successfully turned the theory into reality [1] Group 2: Quantum Logic Gates - Logic gates serve as information switches, enabling both classical and quantum computers to execute logical operations. Quantum logic gates operate using the entanglement between qubits, forming the foundation of quantum computing's immense potential. The recent achievement is attributed to newly developed quantum control software, which is designed based on physical models to minimize disturbances to the GKP code while maintaining its intricate structure during information processing [2] - The GKP error correction code has long been considered a solution to alleviate the resource constraints of quantum computers. The research results validate this concept's physical feasibility, suggesting that future quantum computers may find a new balance between hardware scale and operational efficiency, accelerating their transition from laboratory settings to practical applications [2]
专访中国工程院院士王浩:以节水优先战略破解水资源瓶颈
Ke Ji Ri Bao· 2025-08-24 05:47
Core Insights - Water is essential for life, production, and ecology, with China facing severe water resource challenges despite having a total water volume of 2.8 trillion cubic meters [5][6] - Over 400 out of 655 cities in China experience water scarcity, with 110 cities facing severe shortages, particularly in the northern regions [5][6] - The disparity in water resource distribution between northern and southern China exacerbates the water scarcity issue, as the north holds only 19% of the country's water resources while supporting 46% of the population [5][6] Water Resource Status - China's per capita water resource availability ranks 106th globally, with agricultural water resource per acre being less than half of the world average [5] - The northern region, which occupies 44% of the population and 40% of the arable land, faces a critical water shortage due to the uneven distribution of water resources [5] Importance of Water Conservation - The demand for water is immense, driven by the needs of over 1.4 billion people, extensive agricultural land, and a large industrial sector [6][7] - Water conservation is not just a temporary measure but a fundamental solution for sustainable development [7] Strategies for Water Conservation - Implementing a "water conservation first" strategy is crucial, focusing on prioritizing water-saving measures in planning and management [8] - Key areas for this strategy include establishing a strong awareness of water scarcity, optimizing economic structures based on water availability, and prioritizing investments in water-saving technologies [8] Challenges in Water Conservation - Water conservation is a systemic issue that requires collaboration across various sectors, including industry, agriculture, and urban planning [9] - Current challenges include a lack of awareness, insufficient technology, inadequate infrastructure, and weak institutional mechanisms [9][10] Solutions for Systematic Issues - Focus on policies that enhance water efficiency, develop a pricing mechanism that encourages conservation, and establish standards for water-saving technologies [10] - Promote collaboration among government, enterprises, and the public to foster a collective effort in water conservation [10] Role of Reclaimed Water - The underutilization of reclaimed water is attributed to mismatches in supply and demand, weak infrastructure, and inadequate standards [11] - Addressing these issues is essential for improving the application of reclaimed water in various sectors [11] Public Awareness and Participation - Enhancing public awareness of water conservation is critical for sustainable water resource management [12] - Building a consensus on water conservation across society can lead to significant improvements in water management policies and practices [12]
我国规模最大石化产业基地全面建成
Ke Ji Ri Bao· 2025-08-22 07:12
Core Viewpoint - China National Offshore Oil Corporation (CNOOC) announced the completion of the Dasha Petrochemical Integration Project in Ningbo, Zhejiang, marking it as the largest petrochemical industrial base in China, which is significant for enhancing the efficient conversion of heavy oil and improving the self-sufficiency of high-end chemical materials [1][4]. Investment and Project Details - The total investment for the Dasha Petrochemical Project is 21 billion yuan, with its core production facility utilizing domestically developed technology for the direct cracking of heavy oil into chemical products, achieving a 100% domestic production rate [4]. - The project focuses on enhancing resource utilization efficiency and the value of the industrial chain, transitioning from traditional fuel production to high-end chemical new materials [4]. Production Capacity and Environmental Impact - The core facility has a capacity of 3.2 million tons per year for catalytic cracking, producing 1.2 million tons of polymer-grade ethylene and propylene annually, making it the largest single unit for direct conversion of heavy oil to olefins in China [4][6]. - The project is expected to reduce carbon dioxide emissions by 200,000 tons annually and lower unit product energy consumption by over 30% compared to traditional methods, providing a new pathway for low-carbon transformation in refining enterprises [6]. Technological Innovations - The project team developed a unique "upside-down lining construction technology" to address challenges in the installation of the reactor and regenerator, which have the largest head diameter in the country [6]. - The innovative lining materials and segmented pouring process significantly reduced construction time by 90 days, setting a new benchmark for the shortest installation period for large petrochemical equipment in China [6].
我国首次在永暑礁发现极度濒危物种儒艮
Ke Ji Ri Bao· 2025-08-22 03:53
Core Insights - The discovery of the endangered Dugong in the waters near Yongshu Reef marks the first recorded evidence of this species in the area in nearly 30 years, filling a significant gap in species distribution data [1][5] - The presence of the Dugong, along with other protected species like Hawksbill turtles and Green turtles, highlights the ecological significance of the Yongshu Reef ecosystem and the success of conservation efforts in the South China Sea [8] Group 1 - The monitoring of Dugong activity began in mid-July 2023, with sightings confirmed on multiple occasions, including close observations and photographic evidence [1][5] - The Dugong is classified as vulnerable by the IUCN and plays a crucial role in maintaining the health of seagrass ecosystems, which are vital for biodiversity [4] - The last confirmed sighting of a Dugong in mainland China was in 2008, and it was declared functionally extinct along the Chinese coast in 2022 [5] Group 2 - The discovery of the Dugong corresponds with sightings in Taiwan, providing important data for understanding the species' migration patterns in response to global changes and human activities [5] - The ongoing collaboration between the South China Sea Institute of Oceanology and local environmental departments has established a long-term monitoring system for reef safety and ecological research [8] - Future efforts will focus on enhancing monitoring and research of marine ecosystems in the South China Sea to support conservation initiatives [8]
内蒙古自治区包头市昆都仑区:大项目引领产业转型升级
Ke Ji Ri Bao· 2025-08-22 01:12
Group 1 - The Baotou Longma Casting and Forging Co., Ltd. is advancing its annual production project of 200,000 tons of wind power precision castings, focusing on core castings for wind turbines over 10 megawatts, which will support the localization and large-scale production of wind power equipment in Baotou and the northwest region [1] - The project aims to create a complete industrial chain in Baotou, linking component casting, blade production, tower manufacturing, and complete assembly, thereby strengthening Baotou's position as a significant land-based wind power equipment manufacturing base in China [1] Group 2 - The establishment of the Inner Mongolia regional headquarters of Times Qiji New Energy Technology Co., Ltd. marks a strategic move for the company's innovative battery swapping solution for heavy-duty trucks, aimed at promoting low-carbon transformation in the logistics sector [2] - The local government has implemented a "one-stop" service approach to attract Times Qiji, facilitating the establishment of battery swapping stations in Baotou, which is expected to significantly reduce energy costs for enterprises and enhance the business environment [2] Group 3 - Several key projects, including Guangdong Guangsheng Silicon Industry and the Rare Earth Supply Chain Industrial Park, are driving the transformation of traditional logistics to modern supply chains in the Kunlun District [3] - In the first half of the year, the Kunlun District signed 44 new projects with external investment totaling 11.1 billion yuan, contributing to 35.1% of Baotou's GDP [3]
【科技日报】我国首次在永暑礁发现极度濒危物种儒艮
Ke Ji Ri Bao· 2025-08-22 01:01
Core Insights - The monitoring of the endangered species Dugong in the waters near Yongshu Reef marks the first recorded continuous activity of this species in the area, filling a significant gap in species distribution data [1] - This discovery represents the first scientific evidence of live Dugong in the Nansha Islands and central South China Sea in nearly 30 years [1] Summary by Sections - **Discovery and Monitoring**: Since mid-July 2023, environmental protection personnel and researchers have observed Dugong activity in the waters near Yongshu Reef, with the first sighting occurring on July 8, 2023 [1] - **Observation Details**: The team conducted close observations on August 2-3, capturing images of the Dugong, confirming its presence in the area [1] - **Significance**: The findings not only document the presence of an extremely endangered species but also contribute to the understanding of marine biodiversity in the South China Sea [1]
第七届山西文博会在太原举办
Ke Ji Ri Bao· 2025-08-21 23:47
Core Points - The 7th Shanxi Cultural Industry Expo (Shanxi Wenbohui) was held in Taiyuan from the 21st to the 25th, showcasing the latest achievements in the cultural industry of Shanxi Province [1] - The expo is the largest and most influential provincial cultural exhibition in Shanxi, having been successfully held every two years since 2013 [1] - This year's event featured over 2,000 enterprises from 31 provinces, regions, municipalities, and 36 countries, indicating a significant expansion of its "circle of friends" [1] Summary by Categories - **Event Overview** - The expo adopted a "mainly offline, online simultaneously" model, achieving the largest exhibition scale in its history [1] - It was co-hosted by five organizations, including the Publicity Department of the Shanxi Provincial Committee and the Shanxi Provincial Department of Culture and Tourism [1] - **Exhibitor Diversity** - Exhibiting companies covered cutting-edge fields such as new tourism equipment, smart sports, intelligent cultural relics, and virtual reality [1] - Notable new products included robotic dogs, bionic robots, low-altitude drones, unmanned guides, and underground archaeological pods, showcasing a significant increase in technological content [1]
冻土之上,能源大动脉“热流奔腾”
Ke Ji Ri Bao· 2025-08-21 09:29
Core Insights - The Northeast Energy Strategic Corridor has successfully transported over 330 million tons of crude oil and more than 100 billion cubic meters of natural gas, contributing significantly to the high-quality development of the economy and the well-being of the people [1][3]. Group 1: Technological Innovations - The corridor has achieved the world's first successful crossing of the unstable permafrost zone in the southern Eurasian continent, with key equipment and core control systems fully domestically produced [1][7]. - A pioneering method for predicting permafrost evolution in thermal oil pipelines has been developed, allowing for scientific forecasting of permafrost distribution and dynamic changes [4]. - The research team has created a comprehensive technology system for controlling thawing in permafrost areas, reducing the thawing rate by 70% and ensuring dynamic stability of the pipelines [4][5]. Group 2: Pipeline Safety and Design - The "North Gas South" energy corridor, a landmark project for China's third-generation high-capacity natural gas pipelines, has a daily gas transmission capacity exceeding 110 million cubic meters and an annual capacity of 38 billion cubic meters [6][10]. - A new crack toughness prediction model for large-diameter high-strength pipelines has been developed, incorporating soil type, burial depth, and pipe diameter as dynamic coupling factors [8]. - The first full-scale gas explosion test for a 1422 mm large-diameter, X80 high-strength pipeline was conducted, validating the crack toughness indicators and ultimate load-bearing capacity of the pipeline [8]. Group 3: Intelligent Monitoring - The research team has developed a high-resolution magnetic-electric composite sensing technology for detecting micro-defects and additional stress in large-diameter pipelines [11]. - A pipeline inspection robot equipped with numerous sensors can travel inside the pipeline, collecting approximately 2G-3G of data per minute without affecting the pipeline's operation [11][12]. - An intelligent analysis system has been created to interpret the collected data, enabling timely detection of hidden pipeline defects or stress changes [11]. Group 4: Strategic Importance - The Northeast Energy Strategic Corridor serves as a crucial energy corridor and a flagship project of the Belt and Road Initiative, promoting the development of safe, green, and friendly pipelines [12].
我国空间站舱外服B实现“4年20次”延寿目标
Ke Ji Ri Bao· 2025-08-21 08:13
Core Insights - The Shenzhou-20 mission successfully completed its third extravehicular activity (EVA) on August 15, with astronaut Chen Dong wearing the space station's extravehicular suit B, which has now supported 20 EVAs, achieving China's goal of "4 years and 20 times" for suit longevity [1] - The suit has been used by 11 astronauts across 8 manned missions, demonstrating stable performance and providing strong support for the operational tasks of the space station [1] - The space station's extravehicular suit has significantly improved functionality and performance compared to the first-generation suits, enhancing longevity, safety, and operational efficiency [1] - As of early 2024, the extravehicular suit is approaching the design limit of "3 years and 15 times" for in-orbit use, necessitating a scientific approach to assess its remaining lifespan [1] - A health monitoring and lifespan assessment plan has been developed to ensure the safety and reliability of the suit during its in-orbit usage [1] - Two new extravehicular suits D and E have been successfully unpacked and tested, ready for future EVA tasks [2]
“太湖之光”全面投产——清淤利器开创河湖治理新模式
Ke Ji Ri Bao· 2025-08-21 08:13
Core Viewpoint - The article highlights the launch of "Taihu Light," an innovative integrated ecological dredging platform developed by China Communications Tianjin Navigation Bureau, which aims to address sediment issues in Taihu Lake without occupying land or negatively impacting the environment [1][2][3] Group 1: Company Overview - China Communications Tianjin Navigation Bureau has independently designed and developed the world's first ecological dredging platform, "Taihu Light," which officially commenced full production on August 15 [1] - The company faced significant challenges in developing this technology, as there were no existing precedents for an integrated dredging platform [2] Group 2: Technology and Innovation - "Taihu Light" utilizes advanced technologies, including the V-MBR (Vibrating Membrane Bioreactor) for efficient water treatment, allowing for the processing of sediment and wastewater entirely on the platform [3] - The platform is equipped with 15,000 sensors for intelligent operation, enabling real-time monitoring and adjustment of treatment parameters [3] Group 3: Environmental Impact - The platform addresses the long-standing issue of nutrient-rich sediment in Taihu Lake, which poses a threat to water quality despite improvements in recent years [1] - The innovative dredging method ensures that sediment does not occupy land and that treated wastewater meets surface water quality standards for direct discharge into the lake [3]