Today’s science and technology topics: chang’e-5, the most “longevity” fossil, “Jiuzhang”, “artificial sun”, material cracks, wheat genome sequence Atlas

In the early morning of November 24, 2020, with the successful launch of chang’e-5 probe, alfalfa and oat seeds carried by Lanzhou Institute of animal husbandry and veterinary medicine, Chinese Academy of Agricultural Sciences, started the space mutation experiment. With the support of the lunar exploration and space engineering center and the detector system of the national defense science and Industry Bureau, the aerospace breeding industry innovation alliance has obtained extremely precious space mutation load resources. As the initiator and director of aerospace breeding industry innovation alliance, Lanzhou Institute of animal husbandry and pharmacy provided these important experimental grass seeds through a series of strict evaluation and screening. < / P > < p > “a seed changes a world, a variety promotes an industry”. Due to the lack of high-quality forage varieties and the lag of breeding technology, the level of grass seed industry in China is far behind that of developed countries. Innovation of breeding technology and broadening of genetic resources are aimed at breaking through the “neck” problem of “seed” development in China’s grass industry and breaking the dilemma that high-quality grass seeds mainly rely on imports. The most important thing is to carry out the source innovation of germplasm resources. The Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, announced on December 4 that a new species of eovertebrate fossils from the Late Permian in Yangquan, Shanxi Province, was discovered by Liu Jun’s research team. It is also the only record of this kind of fossil in North China plate and even East Asia. This important discovery and related research achievements of Chinese scientists in the field of paleontology have recently been published in international academic journals. < p > < p > we learned from the University of science and technology of China that the research team composed of Pan Jianwei and Lu Chaoyang cooperated with Shanghai Institute of Microsystems of Chinese Academy of Sciences and national research center of parallel computer engineering technology to build a prototype of 76 photons “nine chapters”, and realized the fast solution of the “Gaussian boson sampling” task with practical prospects. The quantum computing system can process Gaussian boson sampling 100 trillion times faster than the fastest supercomputer at present, and is equivalent to 10 billion times faster than the 53 superconducting bit quantum computing prototype “sycamore” released by Google last year. This achievement makes China successfully reach the first milestone of quantum computing research: the superiority of quantum computing. Relevant papers were published online in international academic journals. The new generation of “artificial sun” device, China circulator 2 m device, was built in Chengdu. < / P > < p > according to CNNC, at 14:02 on December 4, the new generation of “artificial sun” device, China circumfluence II m device, was completed and discharged for the first time in Chengdu. This indicates that China has independently mastered the design, construction and operation technology of large-scale advanced Tokamak devices, laying a solid foundation for the independent design and construction of China’s nuclear fusion reactors. It is understood that in recent years, the National Atomic Energy Agency has innovated its management mode, endowed scientific research institutes with autonomy and decision-making power, continuously and stably supported basic and forward-looking research on nuclear fusion, and spawned a large number of original and cutting-edge achievements. The project was approved by the State Atomic Energy Agency in 2009, and was independently designed and built by Southwest Institute of physics, CNNC. As the competent department of the nuclear industry, the National Atomic Energy Agency (IAEA) has made every effort to promote the basic research and application research related to nuclear fusion by strengthening scientific research investment and R & D capacity building. Russia’s Skolkovo Institute of science and technology and the National Research University of technology have jointly developed a new technology for mechanical testing of complex materials, which can determine the micron level deformation concentration area of materials, so as to find out the location of cracks in advance, and propose solutions to prevent material damage, which helps to better control the state of materials. Relevant research papers were published in the journal. < / P > < p > in order to control the state of oil-bearing rocks, aviation composite materials, engine heat-resistant alloys and other materials with layered structure, it is necessary to understand exactly how the deformation of materials propagates. At present, there is no simple and universal method to analyze the micro deformation of materials, so that researchers can further study and improve its internal structure. To this end, Russian researchers put forward the mechanical testing technology. The method consists of two steps: observing the gradual deformation of materials in the vacuum cavity of electron microscope and synchronous imaging with micron resolution. < p > < p > according to the latest issue of the magazine, an international team led by the University of Saskatchewan in Canada has sequenced the genomes of 15 wheat varieties representing the global breeding program in a landmark study on global wheat production, the 10 + genome project. This will enable scientists and breeders to identify influential genes more quickly, thereby improving wheat yield, pest resistance and other important crop traits. According to the researchers, the most comprehensive wheat genome sequence atlas in history will help solve the huge wheat genome problem and open up a new era for wheat discovery and breeding. It is expected that the global wheat community will use new resources to identify genes related to demand traits, which will enable people to control breeding more precisely, improve the speed of wheat improvement, so as to benefit farmers and consumers and meet future food demand. < / P > < p > original title: < A= target=_ blank>Continue ReadingXiaomi new machine real machine exposure center dig hole screen design or high color thousand yuan machine