作者：石安 来源：原创 发布日期：08-21
A | 8月26日消息，今日，腾讯云宣布，山东莱州中小学教师全员标配WorkBuddy。 
Chinese astronomers have discovered that the Milky Way is not a simple, smoothly warped disk, but contains widespread "wrinkle-like" structures resembling ripples on a water surface, providing new clues to understanding the galaxy's 3D structure and evolutionary history.
The discovery was made by a research team from the Purple Mountain Observatory (PMO) under the Chinese Academy of Sciences, using data from the "Milky Way Imaging Scroll Painting" (MWISP) survey. The findings were published online titled "Widespread corrugations superimposed on the Galactic warp in the outer CO disk" in the journal Nature Astronomy on August 7.
For decades, astronomers have known that the Milky Way's disk is not perfectly flat. Instead, its outer regions are slightly bent upward on one side and downward on the other - a structure known as a galactic warp.
However, the latest study shows that this large-scale bending is not the whole story. Smaller-scale vertical fluctuations are also embedded within the warped disk, creating a more complicated 3D structure.
"In many illustrations and in the public imagination, the Milky Way looks like a flat vinyl record," Sun Yan, associate researcher at PMO and the first author of the paper, told the Global Times on Tuesday. "In reality, the outer part of the Milky Way is more like a record that has been heated and deformed, with one side lifted and the other side lowered. That is the warp. On top of this large-scale deformation, there are additional smaller waves, which we call corrugations," Sun explained.
Using a more everyday analogy, Sun compared the Milky Way's structure to a sea surface. The warp is like a large swell that changes the overall height of the ocean, while corrugations are smaller waves superimposed on that swell.
"The two structures exist together. In our data analysis, we first removed the large-scale warp model, which allowed us to reveal the smaller wave-like patterns hidden underneath," Sun said.
The research focused on the Milky Way's outer gas disk rather than the more familiar stellar disk. According to Sun, cold molecular gas and stars provide two complementary ways to study the galaxy.
"Molecular gas is a sensitive probe for studying the vertical structure and dynamics of the galactic disk because it is concentrated near the disk plane and responds strongly to disturbances," she said.
Molecular gas is also the raw material for star formation, meaning its distribution is closely connected with the formation of young stars. The researchers traced this gas through carbon monoxide (CO) emission, which can penetrate regions obscured by interstellar dust and provide a different perspective from optical observations of stars.
The breakthrough was made possible by the MWISP survey, conducted using China's 13.7-meter millimeter-wave telescope.
"MWISP can be understood as giving the Milky Way a large-scale medical examination using millimeter-wave observations," Sun said.
Previous CO surveys were limited in sensitivity and coverage, making it difficult to accurately study the distant outer regions of the galaxy. In contrast, the latest study identified more than 30,000 molecular cloud samples, covering about half of the Milky Way's outer disk and extending to a distance of about 26 kiloparsecs from the Galactic center.
With such a large dataset, researchers were able to first establish a model of the overall warp and then separate subtle structures from the background. The newly identified corrugations have radial wavelengths of about 3.9-7.9 kiloparsecs and vertical amplitudes of about 100-200 parsecs.
The study also identified a corrugation structure extending about 40 kiloparsecs in azimuth at a distance of around 12.7 kiloparsecs from the Galactic center. In some spiral arm regions, vertical displacements can reach approximately 200 parsecs.
The researchers believe these large-scale vertical fluctuations are likely related to "bending waves" triggered by external gravitational disturbances, suggesting that the Milky Way might have experienced more complex interactions during its evolutionary history.
Although the newly discovered structures sound dramatic, they do not have any direct impact on Earth or the solar system. "Humans cannot directly sense these corrugations," Sun said. "Their scales reach thousands or even tens of thousands of light-years, and even if these structures are evolving, such changes would not be directly perceptible on human timescales."
The study focuses on the outer disk of the Milky Way and does not include the region around the solar system. "There is currently no evidence that these structures have any observable influence on Earth's environment," Sun said.
Instead, their significance lies in what they reveal about the past. Like geological layers recording Earth's history, these galactic structures preserve traces of the Milky Way's evolutionary journey, the researchers explained.
Researchers said future studies combining more precise motion measurements and numerical simulations could further reveal the origins of these structures and their role in the long-term evolution of the Milky Way.
。
据介绍，这是全国教育领域首个教育主管部门主导、校企合作、面向全市教师整体部署的AI智能体应用普及案例。 腾讯云表示，希望WorkBuddy覆盖备课、教学、批改、教研、评价等教学全流程，帮助教师提升工作效率、减轻重复性工作负担，把更多时间还给课堂和学生。 此次落地莱州教育系统的WorkBuddy，将以专属助教的形式为教师提供一系列教育场景定制能力。 在教学资源方面，WorkBuddy联合腾讯企鹅教师助手，上架了33位教育专家和15个即插即用的教学Skill，覆盖备课、教研、学情管理、家校沟通等多个场景。
教师不需要懂技术，把需求用大白话提出来，WorkBuddy就能直接交付教案、课件、表格、网页等成品，进一步降低AI工具的使用门槛。 与此同时，企鹅教师助手还与WorkBuddy联合开发教育专属版本，提供“教学设计”“家校共育”“专业成长”三大工作模式，覆盖21类教学场景，并内置四类开箱即用的能力： 课件制作：按课程安排自动完成课前准备与课后复盘； 创意教学：一键生成项目式学习、辩论赛等课堂活动方案，支持分层任务单； 剧本教学：把知识点变成角色扮演与推理探案的互动剧本； 素材加工：一键优化教案、论文、课题报告与家长会材料。
B | 通过此次部署，AI智能体将进一步深入一线教学场景，从单一内容生成工具转向覆盖教师日常工作的智能助教。
Current article:http://wdu.yindabobiehonggaonumiao.bond/list_yd58us5/vla0c8.html
Published on:10:17:08