News on China's scientific and technological development.
- Thread starter Quickie
- Start date
"China just cured Type 1 diabetes with stem cells!
Within 75 days, the patient had normal glucose level; and has maintained that for a year now.
Groundbreaking medical accomplishment! And the surgery takes only half an hour!"
Tho more research is still needed...
Within 75 days, the patient had normal glucose level; and has maintained that for a year now.
Groundbreaking medical accomplishment! And the surgery takes only half an hour!"
Tho more research is still needed...
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people twitter admiring China's automated ports. Pretty impressive to see in action. I would say that this is like JD's fulfillment centers. Unless they are able to automate like this, there is no way people can handle the level of traffic that these ports need to do.
(Google translated)
"Academician Duan Baoyan's team successfully developed a ground demonstration and verification system for space solar power stations] Recently, the research team of Academician Duan Baoyan of Xidian University published a paper titled "Sun Chasing Project - Innovative Design, Development and Experimental Research of the Ground Verification System of Space Solar Power Stations", which introduced the development of the world's first full-link, full-system ground demonstration and verification system of the Omega Space Solar Power Station (OMEGA-SSPS).
As a clean energy source, the development and utilization of solar energy is of great significance to solving the problems of energy shortage and climate change. However, the current supply of electricity from outer space to the ground is still difficult in the short term, but the space solar power station (SSPS) has great potential in other applications, such as building charging piles in synchronous solar orbits to provide energy for small and medium-sized satellites.
Over the past 50 years, SSPS research has experienced ups and downs, but has never stopped. The innovative SSPS concepts include non-concentrating and concentrating, and most of the current verification experiments have limitations, making it difficult to achieve a complete microwave wireless power transmission experiment. For example, although the relevant experiments of NASA and Japan have verified the feasibility of microwave wireless power transmission (MWPT) to a certain extent, there are problems such as low efficiency and incomplete experimental verification. In order to overcome these difficulties, the research team of Academician Duan Baoyan of Xidian University proposed the innovative design of OMEGA 2.0, which overcame the problems existing in the original concept. At the same time, they established a field coupling theoretical model and proposed a system optimization design method, including beam waveform optimization, control strategy, high-efficiency heat sink design and rectification antenna array efficiency improvement.
In terms of microwave transmitting antenna and waveform optimization, the research team proposed the requirements of high beam collection efficiency and optimized the amplitude and position of antenna units to meet specific beam shapes and safety standards. In terms of directional control, by establishing a coordinate system and adjusting the cable length, the precise directional control of the concentrator to the sun and the transmitting antenna to the receiving antenna was achieved. In addition, the team has also made important breakthroughs in thermal control, rectification antenna optimization design, microwave beam pointing accuracy measurement and intelligent structure design and development.
Finally, the team successfully developed the SSPS ground verification system, which can realize functions such as solar tracking, high concentration ratio, photoelectric conversion, microwave conversion and transmission, microwave reception and rectification, and achieved satisfactory results. Experimental data show that the system has significant advantages in some key technical indicators, such as achieving a high beam collection efficiency of 87.3% and a DC-DC total efficiency of 15.05%.
This achievement has laid a solid foundation for SSPS innovation based on microwave wireless power transmission, and also provided important technical support for the future development and utilization of space solar energy. In the future, the research team will continue to conduct in-depth experiments and innovative research to further improve system efficiency and promote the development and application of SSPS. This research result marks that China has made important progress in the field of space solar power generation, and is expected to provide new ways and ideas for solving global energy problems.Academician Duan Baoyan's team successfully developed a ground demonstration and verification system for space solar power stations | Engineering"
Link
"Academician Duan Baoyan's team successfully developed a ground demonstration and verification system for space solar power stations] Recently, the research team of Academician Duan Baoyan of Xidian University published a paper titled "Sun Chasing Project - Innovative Design, Development and Experimental Research of the Ground Verification System of Space Solar Power Stations", which introduced the development of the world's first full-link, full-system ground demonstration and verification system of the Omega Space Solar Power Station (OMEGA-SSPS).
As a clean energy source, the development and utilization of solar energy is of great significance to solving the problems of energy shortage and climate change. However, the current supply of electricity from outer space to the ground is still difficult in the short term, but the space solar power station (SSPS) has great potential in other applications, such as building charging piles in synchronous solar orbits to provide energy for small and medium-sized satellites.
Over the past 50 years, SSPS research has experienced ups and downs, but has never stopped. The innovative SSPS concepts include non-concentrating and concentrating, and most of the current verification experiments have limitations, making it difficult to achieve a complete microwave wireless power transmission experiment. For example, although the relevant experiments of NASA and Japan have verified the feasibility of microwave wireless power transmission (MWPT) to a certain extent, there are problems such as low efficiency and incomplete experimental verification. In order to overcome these difficulties, the research team of Academician Duan Baoyan of Xidian University proposed the innovative design of OMEGA 2.0, which overcame the problems existing in the original concept. At the same time, they established a field coupling theoretical model and proposed a system optimization design method, including beam waveform optimization, control strategy, high-efficiency heat sink design and rectification antenna array efficiency improvement.
In terms of microwave transmitting antenna and waveform optimization, the research team proposed the requirements of high beam collection efficiency and optimized the amplitude and position of antenna units to meet specific beam shapes and safety standards. In terms of directional control, by establishing a coordinate system and adjusting the cable length, the precise directional control of the concentrator to the sun and the transmitting antenna to the receiving antenna was achieved. In addition, the team has also made important breakthroughs in thermal control, rectification antenna optimization design, microwave beam pointing accuracy measurement and intelligent structure design and development.
Finally, the team successfully developed the SSPS ground verification system, which can realize functions such as solar tracking, high concentration ratio, photoelectric conversion, microwave conversion and transmission, microwave reception and rectification, and achieved satisfactory results. Experimental data show that the system has significant advantages in some key technical indicators, such as achieving a high beam collection efficiency of 87.3% and a DC-DC total efficiency of 15.05%.
This achievement has laid a solid foundation for SSPS innovation based on microwave wireless power transmission, and also provided important technical support for the future development and utilization of space solar energy. In the future, the research team will continue to conduct in-depth experiments and innovative research to further improve system efficiency and promote the development and application of SSPS. This research result marks that China has made important progress in the field of space solar power generation, and is expected to provide new ways and ideas for solving global energy problems.Academician Duan Baoyan's team successfully developed a ground demonstration and verification system for space solar power stations | Engineering"
Link
"Chinese scientists have made a major breakthrough in DNA-based data storage with the innovative DNA Palette coding scheme, successfully encoding 11.28 MB of brain #MRI data into about 250,000 #DNA sequences to achieve an impressive data density of 2.39 bits per base."
China's total computing power reaches 246 EFLOPS, ranking among the top in the world
China News Service, Zhengzhou, September 28 (Reporter Liu Yuying) The 2024 China Computing Power Conference was held in Zhengzhou on the 28th. Zhao Zhiguo, chief engineer of the Ministry of Industry and Information Technology of China, introduced at the opening ceremony that the total scale of China's computing power center racks in use exceeded 8.3 million standard racks, and the total computing power reached 246 EFLOPS (100 billion floating-point operations per second), ranking among the top in the world.
In the field of computing power, China's interconnection and interoperability have been deepened. The 1ms (millisecond) latency guarantee capability between metropolitan computing nodes has gradually been formed, the 5ms latency guarantee capability between regional clusters to surrounding major cities has been widely covered, and the 20ms latency guarantee capability between national hub nodes has been fully realized; the average power utilization efficiency (PUE) of national computing centers has dropped to 1.47, and 246 national green data centers have been created; there are more than 13,000 computing power application projects in multiple fields such as industry, education, medical care, and energy, laying a solid foundation for sharing the fruits of digital development on a larger scale and at a higher level.
Zhao Zhiguo said that it is necessary to strengthen planning and design, coordinate "quantitative growth" and "qualitative improvement"; strengthen innovation-driven development, coordinate technological innovation and industrial innovation; strengthen application cultivation, coordinate "turning points into beads" and "stringing beads into chains"; strengthen security guarantees, coordinate high-quality development and high-level security.
SF express is doing some pretty impressive stuff as usual. Check this out.
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someone actually replied to me with what they have at Shenzhen subway right now with all the loading and unloaded of packages. Pretty good thread here
antiterror13
Brigadier
how would it compare to the US, UK, Germany, France, Japan, Russia, SK and India ?
So in China，using hard disks to transfer data between cities，is alot cheaper than rent fiber
其中在成本方面，他以某一自动驾驶企业为例解释称，该企业在全国4个地方20辆车每天产生的自动驾驶数据，先传回上海再传到贵阳训练，大概需要两条10G和一条1G的电路，一年花费一千万元左右。
用不起怎么办？改用硬盘收集数据，在两个城市间运输，考虑数据丢失、硬盘损害等情况，一年需要190万元左右
In terms of cost, he explained that the autonomous driving data generated by 20 vehicles in four places across the country every day is first transmitted back to Shanghai and then to Guiyang for training, which requires two 10G and one 1G circuits, costing about 10 million yuan a year.
What to do if you can't afford it? Use hard disks to collect data and transport it between two cities. Considering data loss, hard disk damage, etc., it costs about 1.9 million yuan a year.
其中在成本方面，他以某一自动驾驶企业为例解释称，该企业在全国4个地方20辆车每天产生的自动驾驶数据，先传回上海再传到贵阳训练，大概需要两条10G和一条1G的电路，一年花费一千万元左右。
用不起怎么办？改用硬盘收集数据，在两个城市间运输，考虑数据丢失、硬盘损害等情况，一年需要190万元左右
In terms of cost, he explained that the autonomous driving data generated by 20 vehicles in four places across the country every day is first transmitted back to Shanghai and then to Guiyang for training, which requires two 10G and one 1G circuits, costing about 10 million yuan a year.
What to do if you can't afford it? Use hard disks to collect data and transport it between two cities. Considering data loss, hard disk damage, etc., it costs about 1.9 million yuan a year.