I didn't know this. Wuntian has a much wider FOV coverage than Hubble, even as Hubble has the slight resolution advantage. Wuntian is intended for surveying the skies. The imaging sensor for Wuntian is a half a meter square on each side. That's freaking enormous. That's an extreme optical design challenge to get an image completely flat across such a large surface.
News on China's scientific and technological development.
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Discovery by scientists from CAS "provides a pathway towards tunable and ordered Majorana-zero-mode lattices as a platform for future topological quantum computation."
News release in Chinese by CAS:
News report in Chinese by Xinhua:
News release in Chinese by CAS:
News report in Chinese by Xinhua:
Right, but thats where engineering comes in. Furthermore, yea they do have to shrink it down but not by much. Human veins and arteries are about the size this robot is. Arterioles are certainly much smaller, but we treat them differently in the first place.
As for movement, that's the interesting bit. Because right now we have to use permanent stents, and maybe instead we don't need to. Or we can make stenting easier and decrease the risk of blood clotting.
As for how to make it move against the blood vessels... that'll probably be a future paper.
Chinese auto maker the FAW Group successfully tested a "hydrogen direct injection ICE" (缸内直喷氢气发动机) designed for heavy weight commerical vehicles. This is the first of kind in China.
This engine belongs to the 13L class of heavy engines. It has an steady power output of more than 500hp, highest in its class. The thermal efficiency of the engine is as high as 55%.
The success is a breakthrough for China in the field of hydrogen DI ICE.
News report in Chinese:
This engine belongs to the 13L class of heavy engines. It has an steady power output of more than 500hp, highest in its class. The thermal efficiency of the engine is as high as 55%.
The success is a breakthrough for China in the field of hydrogen DI ICE.
News report in Chinese:
Breakthrough achieved in quantum computing
By ZHANG ZHIHAO | China Daily | Updated: 2022-06-09 09:30
Chinese physicists have created a large-scale, ordered and tunable lattice of Majorana zero mode, one of the most exotic phenomena in condensed matter physics－the study of the physical properties of matter, according to a study published in the journal Nature on Wednesday.
Experts said the study may pave the way for more reliable and fault-tolerant quantum computers that can facilitate discoveries in medicine, chemistry, materials science and other fields. However, designing a quantum computer using Majorana zero mode is still in its infancy, and its feasibility and practicality may take decades of research to mature, they added.
In 1937, renowned Italian physicist Ettore Majorana hypothesized that there is a particle, later called Majorana fermion, that can be both an elementary particle and its own antiparticle at the same time. Typically, when a particle and its antiparticle collide, they would destroy each other and release a large amount of energy, but Majorana fermion is an exception to this rule.
After more than eight decades, scientists have yet to find the Majorana particle in the universe.
However, researchers of condensed matter physics have discovered that the analogy of Majorana fermion can exist to some extent in superconductors in the form of Majorana zero mode.
Gao Hongjun, vice-president of the Chinese Academy of Sciences, said Majorana zero mode has been an exciting and rapidly developing field in condensed matter physics given its potential to revolutionize quantum computation.
For instance, one of the biggest engineering challenges of quantum computers is decoherence－external disturbances that interfere with the delicate quantum states of qubits, leading to the creation and accumulation of errors. A qubit is the basic unit of information in quantum computers for storage and calculation, similar to the ones and zeros used in standard computers.
Fang Zhong, the director of the Institute of Physics at the CAS, said the current solution to quantum decoherence is to use a large number of qubits as a buffer to calibrate the ones that do calculations. But manipulating large numbers of qubits is notoriously difficult, which severely limits the practicality and scalability of quantum computers, he said.
An intriguing part of Majorana zero modes is that they are inherently resilient to decoherence and have a significantly lower error rate compared to qubits created using other methods thanks to a unique property called topological protection.
Therefore, if scientists can create logical qubits using Majorana zero modes, they can theoretically make fault-tolerant topological quantum computers that are more efficient and practical, Fang said.
Microsoft's Azure Quantum program is hoping to build a prototype of this type of quantum machine. However, many experts have noted that the process is still in its early theoretical phase, and the effort is considered "a high risk, high reward" endeavor.
Milestone study
Gao called the Chinese study a milestone as it essentially laid the first solid step toward a topological quantum computer.
By placing a superconductor made of iron, lithium and arsenic in magnetic fields and at a temperature close to-273.15 C, or absolute zero, Chinese physicists discovered that they could create an ordered lattice of Majorana zero mode on the sample material.
Su Gang, the director of the Bureau of Frontier Sciences and Education at the CAS, said just a few years ago, it would have taken enormous effort just to create a single Majorana zero mode. Now, scientists can make rows of it, allowing them to study the interactions of these elusive physical phenomena.
For example, by increasing the strength of the magnetic fields, scientists discovered that the number of Majorana zero modes within a certain area can actually increase.
"The significance of the study is that for the first time, we have achieved a large-scale, highly ordered and tunable lattice of Majorana zero mode, which has laid a solid foundation for topological quantum computers," he said.
Quantum computing is widely regarded as one of the most disruptive technologies in the world given its ability to harness the laws of quantum mechanics and solve calculations too complex for even the most powerful conventional supercomputers, such as modeling chemical reactions and optimizing financial decisions.
According to a 2021 report by global consulting firm McKinsey&Company, quantum computing will have a conservative estimated value of up to $700 billion by 2035 for industries such as pharmaceuticals, chemicals, automotive and finance. However, quantum machines won't replace ordinary computers because people's everyday software doesn't require such computing power.
U.S. suspends three firms' export privileges for alleged illegal exports to China.
The U.S. Commerce Department on Wednesday suspended the export privileges of three U.S.-based firms for 180 days for what it said was the illegal export of satellite, rocket and defense technology to China.
Quicksilver Manufacturing Inc, Rapid Cut LLC and U.S. Prototype Inc received technical drawings and blueprints from U.S. customers and sent them to manufacturers in China to 3-D print satellite, rocket, and defense-related prototypes without authorization, the department said.
he three companies, which share the same Wilmington, North Carolina, address, could not immediately be reached for comment.
"Outsourcing 3-D printing of space and defense prototypes to China harms U.S. national security," Assistant Secretary of Commerce for Export Enforcement Matthew Axelrod said in a statement.
"By sending their customers' technical drawings and blueprints to China, these companies may have saved a few bucks, but they did so at the collective expense of protecting U.S. military technology."
Liu Pengyu, a spokesperson for the Chinese Embassy in Washington, said the United States was using export controls as a tool of "economic bullying." Its actions damaged international trade and free-trade rules, and posed a serious threat to global supply chains, he said.
The Commerce Department said the information illegally sent to China included sensitive prototype space and defense technologies and that the 180-day export suspension could be renewed.
It did not identify the companies who had contracted with the North Carolina firms. But, according to the department's June 7 order denying export privileges, a U.S. aerospace and global defense technology company notified the department in February 2020 of a third-party supplier's unauthorized export of controlled satellite technology.
The department's investigation revealed that Quicksilver got an order in July 2017 for satellite parts for the aerospace company's prototype space-satellite. To make components, Quicksilver was given about a dozen technical drawings and 3-D graphic/computer aided drawing files.
A company employee signed a non-disclosure agreement, which included that the work be conducted in compliance with U.S. export control regulations, the order said. Those regulations required licenses that likely would have been denied.
But Quicksilver fulfilled the order that August without seeking a license, and included an invoice that indicated the products had been shipped from China, the order said.
The Commerce Department said it had discovered a similar violation last July by Rapid Cut, whose ownership and personnel are also related to Quicksilver, involving technology that is controlled for national security.
Quicksilver was also involved in a violation relating to a third U.S. company, an advanced science and engineering company with contracts with the Department of Defense, the department said.
It wasn't 3d printing the technology the every single pundit in mainstream was saying that will give the U.S. an edge when comes to manufacturing? That the Chinese days in manufacturing are over? Well that doesn't turn out as they expected if is cheaper to 3D PRINT American design satellite and missile parts in China than in the U.S.
Well that's unfortunate that they can't access cheap 3D printing in China, maybe the could try out that recently opened company in Vietnam with questionable origins and, completely opaque manufacturing and sourcing methods, as an alternative instead?
Also 3D printing is far from being scalable and productive enough in quantities that it can replace China's manufacturing capabilities, and there's still a lot of processes or materials that can't work with 3D printing. Its a massive hopium and unrealistic to think that 3D printing will allow countries to completely onshore all their manufacturing needs.
