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"Mom, what do you think of that set of ‘discs’?" At the exhibition site, a child asked his mother’s hand. "This is the celestial eye matrix pilot array model. The big one in the middle is the'Chinese celestial eye', which is currently the world's largest radio telescope (FAST)." The commentator on the side patiently explained to the children: "In the future, we will discover through them. More stars."

This group of pilot array models running on the FAST network is the black technology of the China Sky Eye Joint Research Center·Guizhou Normal University Sub-center at this exhibition. According to the senior engineer of the center team Yu Xu Hong, the pilot array is based on FAST facing downwards. The first-generation square kilometer telescope array (SKA) consists of 36 "discs" of different sizes. After all of them are completed, the FAST sky observation range, efficiency, accuracy, resolution and sensitivity will be fully improved.

The FSAT Early Science Data Center, the predecessor of the China Sky Eye Joint Research Center·Guizhou Normal University Branch Center, was jointly established by the National Astronomical Observatory of the Chinese Academy of Sciences and Guizhou University in 2014. With the continuous advancement of the province’s big data strategy, it has a large amount of data processing capabilities. China SkyEyes Joint Research Center·Guizhou Normal University Sub-center (hereinafter referred to as the center) can not only serve FAST, but also exert its advantages to serve various fields of big data strategic actions in our province.

Accurate remote sensing lights up geographical "wisdom" information

"Site selection has always been the'old difficulty' problem in the planning and construction of radio telescopes." Zheng Xin, a member of the central remote sensing team, introduced, because the main part of the spherical radio telescope mirror is similar to the shape of a concave mirror, it is most appropriate to choose a depression for construction. Secondly, it must be as far away as possible from radio wave interference sources. This requires the use of advanced remote sensing technology.

"What is remote sensing technology? To put it simply, it is like installing a powerful camera on an airplane or satellite, and obtaining the data you want through image analysis. Only by detecting and analyzing data with different functions can the site be selected correctly." Said Wang Heng, who is in charge of remote sensing and remote measurement at the center.

Therefore, in 2020, the center and Wuhan University will develop an integrated remote sensing information application system based on the characteristics of Guizhou's karst mountains and integrating satellite remote sensing, drone remote sensing, data acquisition vehicles, and ground sensor networks.

At present, the center is carrying out the preliminary investigation and survey of the "China FAST Radio Observation Array Pilot Array" to find a suitable home for the "small disk".

"Using advanced equipment such as UAV airborne spectroscopic cameras, lidars, panoramic arrays, etc., applying cutting-edge technologies such as photogrammetry, laser point clouds, and analyzing and processing big data and cloud computing, it efficiently provides the early work of the FAST pilot array. Detecting information, and will continue to play a supporting role in subsequent planning and design, exploration and construction, operation and maintenance monitoring." According to Wang Heng, in addition to the site selection and exploration of the FAST pilot array, the center focuses on the development needs of mountain agriculture in our province. The agricultural dams in our province use this remote sensing information application system to establish an agricultural big data monitoring and analysis platform, which realizes the collection, calculation, storage and analysis of massive agricultural and ecological, environmental, land and other information, and provides the growth of key economic crops in different dam areas Services such as monitoring, yield evaluation, and early warning of pests and diseases.

Be a "game manager" who fills the "deficiencies"

Accompanied by the continuous surge of big data in Guizhou, there are network security issues that have to be faced.

"If you compare security vulnerabilities to a'flaw' in a game, then we are playing the role of a'game manager'." According to Xu Yang, the Guizhou Key Laboratory of Information and Computing Science, the center, as early as June 2011, The center was approved by the Ministry of Public Security and became the first information security level protection evaluation agency in Guizhou Province.

In fotbollströjor the past five years, the Center’s Key Network Security Laboratory has focused on big data cyberspace security technologies, and conducted in-depth research in multiple directions, such as the quantitative model of network security level protection evaluation, WiFi big data analysis, and the application of artificial intelligence in network security. 8 provincial and ministerial-level projects.

Escorting the highway

"The toll standards for the entrances and exits of expressways in Guizhou Province are all calculated and formulated by our center." Liu Zhijie, deputy director of the Provincial Key Laboratory of Information and Computing Science of Guizhou Province, said: "Expressway billing is a huge project. For It has been 13 years since the Central Big Data Laboratory developed the Guizhou Province’s stand-alone expressway network toll calculation platform in July 2007, and the platform has also experienced a large scale. Upgrade 6 times."

The charging principle of the expressway in Guizhou Province is the lowest toll path toll, the shortest path split, and the correct toll formula is calculated, and then the calculation principles, calculation conditions, preferential policies, etc. can be set in accordance with the formula to obtain one of the two nodes. The correct chargeable amount.

In the initial stage köpa fotbollströjor, the toll standard for Guizhou’s first high-grade highway, Guihuang Highway, formulated by the laboratory, can be completed with a handheld calculator. However, with the grid development of road network construction, manual calculation has been impossible to complete.

In recent years, the transportation system in our province has been continuously improved. The expressway has increased from 1,188 kilometers in 2009 to 7,607 kilometers in 2021. Each additional expressway will have a relationship with the existing road network, thereby changing the original toll calculation method. A new road is connected to the grid and requires a lot of data calculations. Liu Zhijie said: "Each calculation will generate more than 100 million pieces of data and generate more than 50,000 pages of data reports."

Therefore voetbalshirts, the center improved the algorithm, used the big data platform to speed up and increase efficiency, and built the parallel algorithm of the graphics processor as the core, the network distributed processing as the support, the geographic information system as the expression method of the complex road network structure, and the cloud architecture as the storage Method The self-developed expressway toll calculation big data application platform uses super-computing technology for traffic big data processing, ensuring the timely and accurate collection and splitting of expressway tolls, and has become an important part of the province's traffic big data.



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