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开局起步“十五五”：抢抓自贸港建设机遇，海南临高如何加快塑造发展新优势？,开局起步“十五五”：抢抓自贸港建设机遇，海南临高如何加快塑造发展新优势？_我的网站

一 |     　　海口8月26日电 (张月和)“‘十五五’时期是海南自由贸易港在全岛封关运作新起点上全面深化改革开放、实现高质量发展的关键五年，也是临高抢抓自贸港建设机遇、加快塑造发展新优势的重要窗口期。

二 | ”海南省临高县县长王挺在25日举行的“开局起步‘十五五’”系列主题新闻发布会临高县专场上如是说。    

    Schematic diagram of Milky Way Photo: Courtesy of Purple Mountain Observatory (PMO)
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.
。　　当前，临高县立足自身资源禀赋，抢抓海南自贸港建设重大机遇，全力推动现代海洋渔业转型升级、热带特色高效农业提质增效、文旅产业融合发展，夯实产业根基。

三 | 据规划，临高力争到2030年，地区生产总值年均增长7%左右，海洋经济产值突破300亿元。　　面向“十五五”，临高如何抢抓自贸港建设机遇，加快塑造发展新优势？“全力推动核心政策转化落地”，摆在了该县重点抓好的十方面工作之首。　　王挺说，临高将对接实施国际高标准经贸规则，推进海南自由贸易港货物进出“一线”“二线”及在岛内流通税收政策落实，建立健全与之相适应的对接服务机制；持续拓展“加工增值超30%内销免关税”“双15%所得税”及进口“零关税”等核心政策的享惠覆盖面与实效；持续提升金牌港枢纽能级，使之成为政策红利释放和高水平对外开放合作的关键节点。　　锚定“1243”全域发展蓝图，临高着力打造金牌港产城融合发展重要节点，充分释放港口核心优势，加快建成对外开放口岸及“二线口岸”；推动港口优势向产业动能转化，构建以“临港制造、港口物流”为双核的现代临港产业体系；完善园区周边城市配套功能，夯实“以港兴城、以城促港”的发展基础。　　同时，临高强化陆海统筹，坚定海洋渔业“三走”战略方向，推进“接二连三”工程，加快传统渔业转型升级，培育壮大海洋新兴产业，打造现代海洋经济发展新高地；走好标准化、规模化、品牌化的农业现代化道路，推动旅游业提质升级，打造农文旅融合发展新高地。　　王挺强调，临高还要积极培育数字经济、绿色能源、现代服务业、低空经济四大新动能，推动新质生产力形成新的增长点；积极构建“一区三园”协同发展格局，促进各园区协同联动、错位发展。　　临高金牌港开发区是海南自贸港重点园区之一，也是临高产业出海的主阵地。临高县发展和改革委员会副主任王小现称，充分用好“零关税”、加工增值内销免关税、企业和个人所得税优惠等自贸港政策红利，推动园区由生产制造园区向“产业集聚+口岸物流+国际合作”三位一体的国际化平台转型，着力把金牌港打造成为海南西部新型建筑产业出海基地、自贸港面向东南亚、非洲等区域出口枢纽。　　“建设宜商临高，持续优化市场化、法治化、国际化营商环境，深化极简审批改革，完善企业全生命周期服务。”王挺表示，临高的目标是，让更多的人愿意来到临高、留在临高、扎根临高、建设临高，让城市发展与产业发展相互促进、相得益彰。

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Published on:05:17:31