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What is a smart city and what core technologies are needed to build a smart city?
Smart city refers to a modern city that relies on advanced information technology and intelligent means to perceive, collect, process, analyze and integrate various resources, facilities and services of the city in order to improve the operation efficiency, service level and ecological environment quality of the city. At the same time, the digital twin technology can make virtual modeling of various data of the city, and provide all-round support for urban management decision-making.

Digital twin visualization can present the digital twin model in a visual form, so that city managers can understand the operation and management needs of the city more intuitively. All kinds of data of the city can be modeled in a virtual way, and the visual presentation can be realized, so that city managers can understand the operation and management needs of the city more intuitively. Through the application of digital pairing technology, we can perceive, collect, process, analyze and integrate various resources, facilities and services of the city, improve the operation efficiency, service level and ecological environment quality of the city, and realize the construction of smart cities.

Virtual modeling and visual presentation of various urban data will enable urban managers to understand the operation and management needs of the city more intuitively. On this basis, urban managers can make more precise and efficient management decisions through the application of digital twin technology, and improve the accuracy and feasibility of management decisions. Solve many difficult problems in urban management, such as urban traffic congestion, environmental pollution, natural disasters and so on. Let the city managers know the situation of the city more comprehensively, so as to formulate more elaborate and efficient management strategies and improve the operation efficiency and management level of the city.

The large screen of IOC Smart City Intelligent Operation Center is combined with GIS map, with the city map as the background, and the left and right sides are supplemented by 2D panels. Integrate the operation of the whole city from four aspects: urban integration, ecological civilization, social governance and cultural tourism, so as to control the operation of the city in an all-round way and adjust the operation strategy in time.

Population information such as gender, age, nationality, migration and mobility, social security, marriage and childbearing, housing situation, etc. Upload it to the visual screen of Hajto Wave through the census. Use graphic means to clearly and effectively interpret and convey data information, understand the total population and grasp the changing trend of population scale; Analyze population structure and distribution, population migration and flow, population structure evolution and population social change, and dig the value behind the data. Make full use of Internet cloud technology, cloud services and cloud applications to complete data processing.

Access the government data to the visual big screen, and count the data amount of tax information source proportion analysis, manual reporting and communication reporting; Compare the statistics and implementation of tax administration, human society, industry and commerce, investment promotion, land and other data through histogram to remind backward enterprises to speed up data uploading; Comparison between the number of catalogues provided by Statistics Bureau, Market Supervision Bureau, Civil Affairs Bureau and Traffic Management Bureau and the number of demand catalogues.

Docking public security system, fire protection system and medical system, all aspects support real-time monitoring and visual analysis of the operation of various fields of urban public safety. Provide visual management tools for industries such as Goggles Project, skynet project, digital operation and maintenance of public security, and community safety management. The interface also supports real-time animation of typhoon track map and provides real-time information interaction function. HT's 3D engine supports dynamic data on the screen, and customers can get real-time typhoon dynamic information by clicking on the route map. On this basis, we can also search the emergency command knowledge base and choose the appropriate scheme for deployment.

There are professional domestic sewage rainwater pipelines and professional drainage pipeline supporting facilities in the underground comprehensive trench. When the urban sewage pipeline cannot be drained immediately, the larger space in the underground common ditch can be used to realize flood discharge immediately. Quickly determine the liquid level through the liquid level detection system and send the data to the HT monitoring center. If the liquid level is too high, the running state of the water pump can be adjusted in real time, which can effectively reduce the maintenance cost of the pipe gallery and improve the efficiency.

Realize the accurate restoration of Shanghai map. GIS engine, which can synchronize with 3D scene accurately. The garbage classification in Shanghai 16 area is counted separately and viewed in a targeted manner. In the second half of 2002 16, the sorting effect of domestic waste in 220 towns in Shanghai16 reached "excellent" level. Among the districts, Jiading District and Yangpu District rank in the top two in the evaluation results.

Access the intelligent monitoring data and sensor equipment data to the visual big screen, and you can check the total amount of garbage put in the city and the garbage recovery rate in the garbage classification control center that day. Through the visualization of big-screen information statistics, combined with big data, cloud computing and other technologies, we can get the social cost of garbage management, realize refined management, reduce costs and increase efficiency.

Managers can understand the situation of the city more comprehensively, formulate more precise and efficient management strategies, improve the operational efficiency and management level of the city, and realize the construction of smart cities.