一级大片免费_成人免费观看在线_国产一区二区三区精品久久久无广告_久久99精品久久久久久青青91_com.黄_久久久久久久国产免费看

position: EnglishChannel  > Case> Terahertz Waves Reveal Secret of Sanxingdui Artifacts

Terahertz Waves Reveal Secret of Sanxingdui Artifacts

Source: Science and Technology Daily | 2024-09-20 13:10:04 | Author: YU Haoyuan

A robotic arm rotated effortlessly, sending out electromagnetic waves towards a priceless bronze relic. The terahertz scanned the historical legacy unearthed from Sanxingdui, a major Bronze Age archaeological site in Sichuan province, southwest China. The scan results appeared on computer screens, giving researchers detailed information about the rust on the bronze.

This high-tech examination took place recently, at the Terahertz Science and Technology Key Laboratory of Sichuan, affiliated with the University of Electronic Science and Technology of China.

It was the world's first instance of using terahertz waves for tomographic imaging analysis of bronze artifacts. The analysis used the world's first terahertz near-field imaging system based on vacuum electronic devices, independently developed by Chinese scientists.

Terahertz waves are electromagnetic waves with frequencies ranging from 0.1 to 10 terahertz and wavelengths between 0.03 to 3 millimeters. Hu Min, leader of the research team, explained why they chose to use terahertz waves. Compared to ionizing technologies such as X-rays, terahertz waves have extremely low photon energy, thereby preventing harmful ionization reactions. This enables researchers to see the internal structure and material composition of the artifacts without causing any damage. Besides, it's safe for researchers as well.

"Terahertz waves can penetrate most non-metallic materials, and through multi-layer reflections within the object using time-domain pulses, they provide layered structural information so that we don't have to section the artifacts," Hu said.

Zhang Xiaoqiu, another researcher from the laboratory, had more details. To identify the rust layers on the artifact, researchers first constructed a 3D profile of it, using structured light technology to generate a "digital map." With this map, they then employed intelligent algorithms to plan the terahertz wave scanning path, ensuring vertical incidence for precise assessment of the rust layer's thickness.

"The robotic arm manipulates the detection probe to emit terahertz waves, penetrating the rust layer and uncovering the secrets of the relic's internal structure and material properties. Finally, the detection data is integrated with the 3D profile of the bronze, generating a 3D image of the rust layer, visually showcasing the distribution, morphology, and thickness variations of the rust," Zhang said.

The "terahertz fingerprint" enables cultural relic conservationists to gauge the difference between harmful and harmless rust, along with their distribution, thereby making the restoration of artifacts more precise and efficient.

Terahertz wave scanning employs femtosecond pulses for time-of-flight imaging. This obtains preliminary information about the artifact's surface layer in just 10 minutes post-excavation. This technique also facilitates high-resolution imaging, with thickness identification precision reaching 10 microns and horizontal precision extending 50 nanometers.

"Our laboratory will leverage its strengths in terahertz technology to offer non-destructive testing, disease diagnosis, and additional technological support for artifacts from the Sanxingdui site," Zhang said.

Hu said in the future, the laboratory plans to introduce AI and machine learning technologies to enhance the efficiency and accuracy of data processing and analysis in conjunction with terahertz technology, making the investigation results more detailed and reliable.

The team also intends to strengthen interdisciplinary collaboration with researchers from fields such as archaeology and materials science to promote innovative applications of terahertz technology in cultural relic preservation.

Editor:YU Haoyuan

Top News

China Focus: China takes firm countermeasures against U.S. tariff bullying

China has taken swift, firm countermeasures following the latest U.S. tariff hike on Chinese imports, in a move to safeguard its legitimate rights and interests.

2025 ZGC Forum: Gala for Global Sci-tech Cooperation

The 2025 Zhongguancun Forum Annual Conference (2025 ZGC Forum), with a focus on new quality productive forces, concluded on March 31, with significant results and promotion of international sci-tech cooperation.

抱歉,您使用的瀏覽器版本過低或開啟了瀏覽器兼容模式,這會影響您正常瀏覽本網頁

您可以進行以下操作:

1.將瀏覽器切換回極速模式

2.點擊下面圖標升級或更換您的瀏覽器

3.暫不升級,繼續瀏覽

繼續瀏覽
主站蜘蛛池模板: 不卡av在线免费观看 | 一区免费看 | 成年在线免费视频 | 国产精品第一页在线 | 嫩草www| 精品一区二区在线看 | 久草手机在线 | 色老头一区二区三区在线观看 | 日本视频在线观看一区二区三区 | 欧美在线视频一二三区 | 国产一级A片无码免费奶水 懂色一区二区二区av免费观看 | av在线播放色 | 在线观看高清视频免费网站 | 五月色夜婷婷丁香琪琪 | 久久久人成影片一区二区三区观看 | 91人人视频在线观看 | 一级黄色视屏 | 欧美精品乱码99久久蜜桃 | 亚洲一区二区在线免费观看视频 | 斗罗大陆4终极斗罗免费观看 | 成人区视频 | 久久久久久国产视频 | 日本xxx在线播放 | 国产蜜月AⅤ网站 | 在线观看免费观看电视 | A级毛片高清免费视频在线播放 | 久久免费高清视频 | 国产精品综合不卡av | 亚洲少妇综合网 | 欧美第一视频 | 亚洲午夜小视频 | 大地在线视频免费观看高清视频大全 | 神偷奶爸4中文版免费观看 国产精品久久97 | 亚洲视频成人 | l奇米网_奇米影视_奇米第四色在线影院 | 含羞草会员 | 美女被久久久 | 亚洲福利网站 | 亚洲宅男天堂在线观看无病毒 | 国产一二区 | 亚洲麻豆av肉丝网站一区二区 |