News on China's scientific and technological development.

Wrought

Junior Member
Registered Member
A quantitative analysis on the spread of military-civil fusion from 2015-2021.

摘 要 : 新兴领域军民两用技术的高效转移是形成新域新质作战力量的关键驱动力。通过提炼新兴领域军民两用 技术转移的内涵和形成机制,以 2015-2021 年间 145 家新兴领域军民融合企业作为研究样本,采用退火算法优化 投影寻踪模型及高斯核密度估计分析其演化趋势,并通过 ICTM 分析框架诊断其障碍因子。结果表明:新兴领域 军民两用技术的转移通过双螺旋耦合机制和相对技术势差流向机制得以实现;新兴领域技术转移水平呈现上升趋 势,存在能力跃迁现象,但不同战区间转移水平差距逐渐扩大,形成明显的“梯型效应”。研究还发现,新兴领 域技术转移意愿、新兴领域军民融合理念、新兴领域技术要素流动性、新兴领域保密机制和新兴领域中介能力是 影响新兴领域军民两用技术转移的关键障碍因子。研究结果丰富技术转移相关理论,并为新兴领域军民融合发展 提供一定的参考价值。

In English:

Abstract:The efficient transfer of dual-use technology in emerging fields is a critical driving force in forming new domain operational capabilities. This paper distills the essence and formation mechanisms of dual-use technology transfer in emerging fields, using 145 militarycivil fusion enterprises from 2015-2021 as the research sample. By optimizing the projection pursuit model with an annealing algorithm and analyzing the evolutionary trend through Gaussian kernel density estimation, the study further diagnoses obstacle factors using the ICTM analysis framework. Results indicate that the transfer of dual-use technology in emerging fields is realized through a double-helix coupling mechanism and a relative technology potential difference flow mechanism. The level of technology transfer in emerging fields shows an upward trend, with evidence of capability leapfrogging; however, the transfer level gaps between different zones are widening, leading to a distinct "stepped effect." The study also identifies that the willingness for technology transfer, the concept of military-civil fusion in emerging fields, the fluidity of technological elements, confidentiality mechanisms, and intermediary capabilities are key obstacle factors influencing the transfer of dual-use technology in emerging fields. The findings enrich the theory of technology transfer and provide valuable insights for the development of military-civil fusion in emerging fields.

Please, Log in or Register to view URLs content!
 

SanWenYu

Captain
Registered Member
Scientists from CAS developed a new method to make gold microsphere arrays for high density chip packaging such as in micro-LED.

Paper in English:
Please, Log in or Register to view URLs content!


Rapid fabrication of gold microsphere arrays with stable deep-pressing anisotropic conductivity for advanced packaging​

Abstract​

Smooth metal microspheres with uniform sizes are ideal for constructing particle-arrayed anisotropic conductive films (ACF), but synthesis is hindered by challenges in controlling anisotropic metal growth. Here, we present a positioned transient-emulsion self-assembly and laser-irradiation strategy to fabricate pure gold microsphere arrays with smooth surfaces and uniform sizes. The fabrication involves assembling gold nanoparticles into uniform colloidosomes within a pre-designed microhole array, followed by rapid transformation into well-defined microspheres through laser heating. The gold nanoparticles melt and merge in a layer-by-layer manner due to the finite skin depth of the laser, leading to a localized photothermal effect. This strategy circumvents anisotropic growth, enables tunable control of microsphere size and positioning, and is compatible with conventional lithography. Importantly, these pure gold microspheres exhibit stable conductivity under deep compression, offering promising applications in soldering micro-sized chips onto integrated circuits.

News release in Chinese:
Please, Log in or Register to view URLs content!

近期,中国科学院合肥物质院固体所纳米材料与器件技术研究部,与高分子与复合材料研究部、粤港澳量子科学中心等合作,在异方导电金微球阵列的快速制备及性能研究方面取得新进展,实现先进封装用金微球阵列异方导电胶的高效构筑。相关研究结果发表在Nature Communications上。
该策略的核心关键是利用激光诱导的快速逐层熔化-融合过程,有效地避免了金属的各向异性生长。理论模拟发现,这种逐层熔化-融合主要归于激光的趋肤深度有限,使金颗粒产生的光热效应局域在超粒子的表面。此外,该方法具有高度普适性,适用于各种强光热效应的纳米颗粒作为组装基元,不论其尺寸、形貌与成分。例如,研究人员以Au-Pd和Au-Ag-Pt核壳纳米颗粒作为组装基元,制备出了尺寸均一、表面光滑的Au-Ag-Pd-Pt合金微球(图2),有望应用于粒径均一的高熵合金微球的高效制备。

相比于商业化镀金微球,该纯金属微球得益于其纯金材料优异的延展性和可塑性,展现出在深度压缩下的超稳定导电性能(图3)。该纯金微球阵列有望为微显示μLED芯片的超高密度键合方面提供最佳案,从而推动在高分辨率显示领域的发展与应用。
 

GulfLander

Senior Member
Registered Member
I mean obviously China should be OK with sharing technology. To not share assumes China is weak and cannot innovate. The opposite is quite obviously true. Just look at America. They go on and on about how China needed their tech to grow. And had USA not gone insane in recent years, their people would still be living in the most advanced economy in the world. It's not the sharing that is collapsing America, it's the lack of it. Not that our discussions matter, and frankly the Chinese leaders are absolutely excited and ready for this.
Maybe Not abt being weak.. Maybe just reciprocal basis, West shared some tech but not the best dual use tech to CN before..
 

ougoah

Brigadier
Registered Member
Does anyone have more info on this company and the project?
Please, Log in or Register to view URLs content!

Looks like a private start up only test flew a scaled demonstrator.

This is like 10+ years away from full sized demonstrator maiden flight and another 10+ years to certifying and serial production. Add another 20+ years on top of that passengers can trust a reliable near hypersonic commercial airliner.
 

GulfLander

Senior Member
Registered Member
From a Facebook article:

"CHINA NOW HOME TO HALF OF WORLD'S TOP SCIENCE HUBS
A single country, China, now has half of the world's top 20 leading "superstar science cities", researchers reported yesterday.
.
And even China's smaller cities are beating long-established western centers of scientific excellence such as London, according to a new study by Nature, the world's top academic science journal.
.
The world's number one place on the science city ranking is Beijing, with more than twice the score of any equivalent place on earth. Shanghai is in second place, with New York third and Boston fourth, the latest index shows. (Ranking is based on publication article share.)
.
.
.
.
SCIENCE MEGA-STRUCTURES
But what's really remarkable is the placing of smaller Chinese cities, says Nature writer Jacob Dreyer. Nanjing is in fifth place and Guangzhou in eighth place—ahead of Tokyo, Paris, Seoul, and London.
.
Furthermore, the Chinese are quietly making science mega-structures in places far away from the capital, he reports. This is an attempt to spread the wealth away from the richer parts of the country to areas that need economic growth--to avoid inequality leading to dissatisfaction.
.
Guizhou has a Five-hundred-meter Aperture Spherical Radio Telescope, the Kunming Institute of Botany in Yunnan houses Asia’s largest seed bank, and Xinjiang has 3.5-gigawatt solar panel field.
.
Hefei, another place most westerners have never heard of, is a fascinating example, Dreyer writes. The city, capital of Anhui province, "scores higher for natural sciences in the Nature Index Science Cities list than London, Los Angeles or Chicago, and is home to the University of Science and Technology of China, the fifth ranked institution globally in the Nature Index in 2023".
.
.
.
.
AVOIDING POPULIST ANGER
Dreyer believes that the wide geographical spread of investment is strategic. "As China faces an unequal, two-tier economy, with coastal provinces having much higher incomes than interior provinces, it has become politically essential to balance the country’s wealth, lest they experience some Chinese version of the populism that is gripping many Western societies," he writes.
.
In some ways, the astonishing development of science in China is unsurprising.
.
Think about it: China and the US have similar-sized economies, but the first focuses strongly on education, while the second blows a trillion US dollars a year on the military – despite the fact that there are literally no countries on earth with any plan to invade it."

Screenshot_20241121_175343_Facebook.jpg
Facebook link:
Please, Log in or Register to view URLs content!


Please, Log in or Register to view URLs content!

Please, Log in or Register to view URLs content!
 
Top