Core Insights - The research team led by Professor Zhang Zhifei from Northwest University has successfully uncovered the mystery of Cambrian small shell fossil preservation after seven years of effort [1][2] - The study reveals that small shell fossils can be preserved through various methods, including phosphatization, dolomitization, and glauconitization, with phosphatization not being the dominant preservation method in the late Cambrian [1][2] Research Findings - The research involved the acid treatment of nearly 8 tons of Cambrian carbonate rock samples, resulting in the successful extraction of over 35,000 small shell fossils [2] - Advanced analytical techniques such as micro-X-ray fluorescence spectroscopy and scanning electron microscopy were employed to discover the diverse preservation methods of small shell fossils [2] - The study confirms that phosphatic deposition is not the primary factor controlling the production of high-quality small shell fossils, suggesting alternative preservation mechanisms [2] Implications - This research provides a new perspective for the search and interpretation of early life fossils, demonstrating that life evolution evidence can be preserved even under unfavorable conditions lacking phosphates [2] - The findings are expected to significantly advance the understanding of the mineralization mechanisms of animal skeletons and the early evolutionary processes [2]

Group 1 - The China-Shanghai Cooperation Organization (SCO) Local Economic and Trade Cooperation Conference was held in Qingdao, Shandong, focusing on regional cooperation and innovative development [1][2] - Approximately 360 exhibitors showcased unique products, attracting nearly 3,000 buyers for trade discussions, highlighting the vibrant trade among SCO member countries [2][3] - The trade volume between China and SCO member states, observer countries, and dialogue partners is projected to reach $890 billion by 2024 [2] Group 2 - The SCO Secretary-General emphasized the complementary advantages in market, economic structure, human resources, and natural resources among member countries, with a focus on digital economy and green energy cooperation [3] - The conference included cooperation meetings on various industries such as renewable energy and marine IoT, promoting the integration of innovation and industry [4] - China is providing practical and efficient solutions in renewable energy technology, with significant interest from SCO representatives in advanced technologies presented by companies like Huawei and China Electric Power Research Institute [4][5] Group 3 - Qingdao is positioning itself to develop future marine industries, including marine IoT, by enhancing technological breakthroughs and infrastructure upgrades [5] - The development of marine IoT is seen as a trend, with expectations for expanding cooperation among SCO countries in areas like pollution monitoring and disaster prevention [5]

针对该工程需求，今年，中国电力科学研究院在国家电网有限公司特高压部的指导下，结合华东地区高 湿热的服役环境，通过增强声振解耦吸声板降噪技术的通风散热能力、板材防腐能力、智能监测能力， 研制出一套适合高湿热地区的模块化可拆卸声振解耦吸声板，成功解决在运特高压电抗器高效降噪与运 维适应性、服役可靠性难以兼顾的技术难题，从根源上消除了在运设备噪声污染的隐患，实现了厂界噪 声达标。 该工程的成功投运，标志着我国在高湿热环境下特高压电工装备噪声控制技术领域实现重大突破，为我 国南方湿热地区电力设备降噪改造树立了行业典范，推动了我国电工装备的低碳环保转型，也为平圩电 厂的电力送出、江浙地区的电力可靠供应提供了保障。 记者近日从中国电力科学研究院获悉，淮南1000千伏特高压变电站淮芜Ⅰ线高抗降噪改造工程顺利投 运。该工程采用我国具有完全自主知识产权的声振解耦吸声板降噪技术，达成在运设备噪声降低15分贝 的降噪目标，在华东高湿热地区首次实现声振解耦技术示范应用，促进了特高压电抗器降噪技术的全新 迭代升级。 据了解，淮南1000千伏特高压变电站，是"皖电东送"关键枢纽，肩负向上海、江苏等地稳定供电重任， 自建站已累计输电超30 ...

Core Viewpoint - The innovation of cadmium telluride (CdTe) photovoltaic glass represents a breakthrough in the construction and energy sectors, aiming to address the challenges of the photovoltaic industry amidst intense competition [1][3]. Group 1: Product Features and Applications - CdTe photovoltaic glass can generate electricity even under indoor lighting conditions, with higher efficiency outdoors, making it suitable for various applications such as office building facades, factory roofs, and residential sunrooms [1][2]. - The glass has excellent fire resistance and thermal insulation properties, allowing it to replace many traditional building materials while also being suitable for building-integrated photovoltaics (BIPV) projects [2][3]. Group 2: Technological Development and Production - The production of CdTe photovoltaic glass involves overcoming several technical challenges, including semiconductor doping, crystal growth, and laser processing, with a total thickness of the CdTe film layer being approximately 3 micrometers [2][3]. - The company has developed its own production equipment after years of research, achieving a product yield rate exceeding 97% and matching international advanced levels in product and equipment performance [2][3]. Group 3: Market Strategy and Future Goals - The company aims to increase the conversion efficiency of CdTe photovoltaic glass to over 18% and is focusing on expanding new application scenarios to find growth opportunities in a saturated market [3]. - The integration of CdTe photovoltaic glass in architectural designs is becoming more common, with recent applications in significant projects, indicating a shift towards innovative building materials in the construction industry [3].

Group 1 - The third China International Supply Chain Promotion Expo showcased innovative health testing products, including gene testing for alcohol sensitivity and real-time ultrasound checks [1][2] - BGI Group introduced a proprietary "micro-sequencing" technology aimed at making gene testing as accessible as blood glucose and blood pressure monitoring, allowing for quick alcohol metabolism capability assessments [1][3] - The mini-sequencer and portable ultrasound device are designed to make advanced medical technology more accessible, with applications in public health and personalized healthcare solutions [2][3] Group 2 - BGI Genomics, as a leading company in the gene sequencing equipment sector in China, has over 3,300 users across research and clinical fields, contributing to daily scientific advancements [3] - The company emphasizes the importance of collaboration and resilience in advancing life sciences and health technology applications, aiming to establish industry standards and an open ecosystem [3]

Core Viewpoint - The Chinese government aims to promote the development of high-power charging facilities, targeting over 100,000 units by the end of 2027 to alleviate "charging anxiety" among electric vehicle owners [1] Group 1: Differences Between High-Power and Regular Charging Stations - High-power charging facilities, also known as supercharging stations, provide significantly higher power levels than conventional charging stations, with a common definition being direct current (DC) charging facilities with an output power of 250 kW or more [1][2] - Leading supercharging stations can achieve power outputs of 600 kW to over 1000 kW, enabling rapid charging [1][2] Group 2: Benefits for Electric Vehicle Owners - The implementation of supercharging stations can address the "charging anxiety" and "range anxiety" faced by many electric vehicle owners, allowing for charging times of 5 to 15 minutes to support driving ranges of 200 to 600 kilometers [2][3] - Supercharging stations can significantly reduce waiting times for charging, making long-distance travel more feasible and convenient for electric vehicle users [3] Group 3: Ensuring Charging Safety - The technology behind supercharging stations involves high voltage platforms (1000V or 1500V), which necessitate that both the vehicle battery systems and charging stations support high voltage and high power charging protocols [4] - Addressing safety concerns related to high current and heat generation during charging is critical, with challenges including effective heat dissipation to prevent overheating and potential fire hazards [4][5] Group 4: Technological Innovations for High-Power Charging - High-performance power devices, such as silicon carbide semiconductors, are utilized in supercharging stations to enhance efficiency and safety during high-power charging [5] - The large-scale deployment of supercharging stations will drive continuous innovation in battery technology, focusing on materials, structural design, and thermal management systems to improve battery performance and longevity under high charging rates [5]

7月9日，第十二届世界高速铁路大会期间，位于北京朝阳的国家铁道试验中心，成为国内外参会嘉宾关 注的焦点。这里，大家争相试乘体验世界首款试验运行时速450公里、商业运营时速400公里的新一代高 速动车组——CR450。 当前，CR450动车组已完成样车下线、型式试验、互联互通调试等一系列研发工作，正在开展考核试验 和性能验证，为正线试运行做各项准备。 "这意味着中国铁路已进入高铁科技创新'无人区'。"复兴号动车组总体技术专家、中国铁道科学研究院 集团有限公司（以下简称"铁科院"）首席研究员赵红卫告诉科技日报记者，为了将商业运营时速再提升 50公里，国铁集团牵头组建创新联合体，先后攻克永磁牵引、气动减阻、短距离制动等难题，在全球范 围内首次创建时速400公里动车组技术体系。 1.6倍功率提升 提高列车速度，首先要考虑提升动力牵引系统性能。 为增强牵引性能，研发人员决定将具有自主知识产权的大功率永磁牵引系统搬上CR450动车组，标志着 我国高铁开启了"永磁时代"。 "装车难度很大！"赵红卫介绍，"永磁系统有一大隐患，即电机在发生匝间或相间短路时，因永磁体缘 故，并不会停止转动，可能导致电机损坏，影响行车安全。" 为 ...

Core Insights - The article discusses the advancements in urban renewal and old housing renovation in China, highlighting the importance of modern technologies in improving design accuracy and efficiency [1][2][4]. Group 1: Urban Renewal and Housing Renovation - Since the implementation of urban renewal initiatives in 2019, nearly 280,000 old urban communities have been renovated, benefiting approximately 120 million residents [1]. - The integration of new technologies such as fusion modeling, 3D visualization WebGIS, and indoor pollutant simulation is transforming the design and renovation processes, making them more precise and efficient [1][2][7]. Group 2: Fusion Modeling Technology - Fusion modeling technology combines oblique photography and point cloud modeling to create high-precision 3D models, enhancing the detail and accuracy of building designs [2]. - This technology allows for better communication between designers and residents, enabling the exploration of multiple design options and early identification of potential issues [2][3]. Group 3: 3D Visualization WebGIS Platform - The 3D visualization WebGIS platform aids in urban renewal projects by allowing designers to visualize and analyze spatial data in a more interactive manner compared to traditional 2D software [4][5]. - Residents can engage in the renovation discussions by visualizing the outcomes of proposed changes, ensuring that the final designs meet their needs [4][5]. Group 4: Indoor Pollutant Simulation Technology - Indoor pollutant simulation technology helps identify and mitigate air quality issues during the renovation process, ensuring healthier living environments [7]. - This technology can predict air quality post-renovation by analyzing common pollutants and optimizing design elements accordingly [7]. Group 5: Virtual Reality Technology - Virtual reality technology provides immersive experiences for residents, allowing them to visualize and interact with future designs, thus enhancing public participation in the renovation process [8][9]. - As costs decrease and technology improves, virtual reality is expected to play a crucial role in urban renewal, facilitating faster and more cost-effective transformations of old buildings [9].

Core Insights - The newly opened Dahu Village Ruins Museum in Zhengzhou, Henan Province, showcases the origins and development of Chinese civilization, particularly the Yangshao culture, through over a thousand artifacts from more than 30 significant archaeological sites [1][2] Group 1: Historical Significance - Dahu Village Ruins, discovered 61 years ago, spans approximately 530,000 square meters with a cultural layer thickness of 12.5 meters, encompassing multiple ancient cultures including Yangshao, Longshan, Erlitou, and Shang [2] - The site reflects a continuous cultural development from 6,800 to 3,500 years ago, making it unique compared to other ancient sites [2] Group 2: Architectural Insights - The museum features well-preserved remains of a 5,000-year-old residence, showcasing advanced construction techniques with wooden frameworks and mud walls, marking a milestone in ancient Chinese architecture [3] - The transition from semi-subterranean dwellings to ground-level buildings indicates a shift towards more complex societal structures and living arrangements [3] Group 3: Cultural Artifacts - The most notable artifacts from the site are the colorful pottery pieces, which signify a peak in prehistoric pottery culture, with the museum's centerpiece being a white pottery basin with intricate symmetrical designs [4] - The artifacts also reveal early astronomical observations by the inhabitants, indicating the development of timekeeping concepts [4] Group 4: Cultural Impact - The opening of the new museum is expected to enhance Zhengzhou's status as a cultural landmark along the Yellow River, providing a unique opportunity for the public to engage with the origins of the Yangshao culture and Chinese civilization [4]

Core Viewpoint - The article highlights the importance of precision and responsibility in the manufacturing of rocket engines, emphasizing the role of skilled workers in China's aerospace industry [1][4]. Group 1: Achievements and Innovations - The company has achieved a product precision enhancement to 0.02 mm and resolved 75 production challenges related to rocket engines, alongside filing 25 technical patents [1]. - A significant breakthrough was made in 2016 when a team successfully achieved micron-level precision control in a non-precision environment, with a first trial pass rate of 100% after nearly 50 attempts [3]. Group 2: Skills Development and Training - The company emphasizes a strong focus on talent cultivation, utilizing a "master-apprentice" model to train new employees, which includes hands-on project involvement to foster innovation and problem-solving skills [6][7]. - The establishment of a workshop named after a skilled worker has led to the formation of a talent pool that includes many high-skilled individuals, with over 20 projects completed and 32 invention patents filed in the past two years [7]. Group 3: Future Directions and Educational Integration - The company is exploring digital and intelligent manufacturing technologies, aiming to transition traditional manufacturing from small-batch processing to a more integrated digital and intelligent production model [5]. - There is a call for enhanced vocational education that integrates new production quality development, promoting industry collaboration and a dual-mentor training model to better prepare students for advanced manufacturing roles [8].