| According to relevant survey data in the White Paper on the Situation of the Loss of elders in China,the number of elders lost each year is as high as 500,000.The security and harmony of every lost family are affected.In the face of a large number of missing elderly data,it is important to find the missing elderly person quickly,in real time and efficiently.In this paper,based on the current system of missing persons,combined with the characteristics of the elderly,based on HBase and HDFS,GeoHash algorithm,etc.,design and development of the system for the search for missing elderly.The main research content is as follows:First of all,the paper outlines the research background and significance of the missing elderly system based on cloud platform,the research status of cloud storage,and the related knowledge of system application,including HBase and HDFS,Android,and location services.Secondly,the functional requirements analysis,non-functional requirements analysis,system design and database design were performed for the missing elderly system based on the cloud platform.The functional requirement analysis includes the analysis of client-side function requirements,management-side functional requirements,and storage-side functional requirements.The system design includes the overall design and detailed design.The overall design includes the system composition system,the overall system architecture,and the overall business process of the system.The detailed design includes detailed design of the user end,detailed design of the management end,detailed design of the storage end,and flow charts and use cases.The figure gives a detailed description of the functions of the important modules in the system.Then,the basics of the system application model are described,including geocoding,buffer analysis,GeoHash algorithm,and a demand map model and missing clue heat map model are established.Finally,using the Visual Studio 2012 development platform,the.NET development framework was used and the C# programming language was used to develop the management side of the tracing system.The main functions of user management,information audit,data maintenance and data analysis are realized.Using the Android Studio development platform,the user side of the tracing systemwas designed and developed using the Java programming language.The main functions of user registration and login,viewing the map of requirements and disappearance clues,posting search information,viewing demand information and help information lists,and user feedback are realized.The Hadoop platform is deployed under the centos system,and a picture file management table,a video file management table,an upload text record table,and the like are established.The system has been tested and analyzed to show that the system for missing and missing elderly people designed and developed in this paper not only solves the problem of large-scale data processing and storage,but also finds missing elderly people in real time,mutual aid,and efficiency,thus realizing the dream of “reunion”for the missing elderly families.,so the system has application value. |
