Core Viewpoint - The article highlights the critical role of track inspectors, specifically focusing on the work of He Zhiwen, who conducts ultrasonic testing on high-speed rail tracks during the night to ensure passenger safety during the busy Spring Festival travel period [1][6]. Group 1: Track Inspection Process - The inspection is conducted during the "downtime" of trains at Foshan West Station, where the increased train volume during the Spring Festival poses significant challenges to track equipment [1]. - He Zhiwen uses an ultrasonic testing device to analyze waveforms, checking for internal damages in the heart rail, which is crucial for the safe operation of trains [1][4]. - The heart rail, being only 5 centimeters at its narrowest point, requires precise handling of the testing equipment, often needing the inspector to maneuver in tight spaces [1]. Group 2: Operational Details - The inspection process includes placing protective wooden blocks, grinding the rails to ensure a smooth surface, and applying coupling oil to enhance the effectiveness of the ultrasonic testing [3][4]. - He Zhiwen and his team utilize various probes and perform multiple checks on different parts of the heart rail, including the rail surface, side, and angle, to ensure comprehensive coverage [6]. - After completing inspections on multiple switches, He Zhiwen confirms that there are no damages found, ensuring the safety of the rail infrastructure [6].

Group 1 - The article emphasizes the importance of cultivating skilled workers and craftsmen to support national economic development and innovation [2] - A large-scale theme promotion activity titled "Chinese Dream: Great Craftsman Chapter" was launched in Henan Province to celebrate the 100th anniversary of the provincial trade union, highlighting the achievements of 15 model workers in key industries [2] - The article showcases individual stories of labor models, including their dedication and contributions to their respective fields, such as railway safety and logistics [2][3][5][6][10][12] Group 2 - Xu Peng, a national labor model, has discovered over 1,500 rail defects in his 24 years of work, maintaining a record of zero misjudgments over 15,000 kilometers of rail inspections [5] - Ren Xiulin, another national labor model, has delivered over one million packages with a record of zero complaints and zero errors, demonstrating exceptional service in the logistics industry [6] - Du Zhongxian, a maintenance workshop director, has led the development of automated cleaning machines, significantly improving production efficiency and safety in the manufacturing of train wheels [8][9] Group 3 - Yan Chunsheng, a chief engineer at a chemical company, successfully developed lithium hexafluorophosphate, a key material for lithium-ion batteries, achieving significant production efficiency improvements and cost reductions [10][11][12] - Wang Fei, a professor and paper-cutting artist, has integrated traditional craftsmanship with modern cultural initiatives, promoting the art form and training thousands of enthusiasts [13][16] - Wang Anyong, a welding team leader, has contributed to the manufacturing of major national projects, utilizing innovative welding techniques to enhance production quality and efficiency [17][18]

导读： 揭秘航空航天领域的科学仪器，它们是航天任务的幕后英雄，支撑材料分析、环境模拟、测控通信等关键环节。值此航天日之际，仪器信息网特别盘点梳 理航空航天领域应用到的科学仪器。 特别提示 微信公众号机制调整，请点击顶部"仪器信息网" → 右上方"…" → 设为 ★ 星标，否则很可能无法看到我们的推送。 4月2 4日，我们迎来了第十个中国航天日。从1 9 7 0年4月2 4日我国成功发射第一颗人造地球卫星 "东方红" 1 号，到如今中国空间站全面开启建 设、"天问一号" 实现行星际探测跨越，我国航天事业取得了举世瞩目的辉煌成就。在这场星辰大海的征途中，除了航天人的不懈努力，还有众 多科学仪器在默默发挥着关键作用，无数科学仪器与检测设备默默支撑着每一次发射、每一刻驻留、每一项实验，它们堪称助力航空航天的幕 后英雄。值此航天日之际，仪器信息网特别盘点梳理航空航天领域应用到的科学仪器，参考仪器信息网的仪器分类体系，通过案例与数据，揭 秘这些"幕后英雄"的科技力量。 材料分析仪器：筑牢航天材料根基 航空航天材料需具备高强度、低密度、耐高温、耐辐射等特性。材料分析仪器可对材料微观结构、成分及性能进行精确分析，为材料研发、 ...