Research On The Digital Depiction Of Empty Container Repositioning Network In Bohai Bay

As the development of computer science, computer technology has been used in more and more areas. Among usages, database technology is the most wildly used. The paper is an excellent example. The author applies database technology to the field of transporting empty containers, which is a brand new idea.Transporting empty containers is a cost-wasting and resource-wasting problem. An increasing number of people concerned begin to pay attention to and try to solve the issue. The author does not present a new theory, a new method or a new strategy to optimize the issue. Instead, she applies the problem to two kinds of software, collects data and lays the groundwork for people who would like to establish a decision support system of this issue in the future.First, the author talks about the overall situation of transporting empty containers, which includes the flow of transporting empty containers and the reason why the problem of transporting empty containers exists. Then, she analyses the essence of this problem and the component of the cost. With a general model, she finds out the factors that have an effect on the problem of transporting empty containers, which means she makes the need analyze before establishing the database. Then, she divides all the data into three groups according to different themes. After that, she makes the Access database for these three tables. Next, she uses three tools of Access database (inquiry, statistics and table-making) to reveal the function of the database she made. Among all the applying cases, there are several really valuable ones.Next is the connection of the Access database and MapInfo maps. Here she. explains why she chose Access as the database software to establish a database for the problem of transporting empty containers. The reason is that MapInfo, as one kind of GIS software, can only recognize Access data and data-input. First, MapInfo turns Access data to MapInfo tables. Then MapInfo uses its special function (geo code) to match the data to maps, so it is unnecessary to input numbers to MapInfo by hand. Instead, the data can be input to MapInfo automatically. MapInfo not only can do this. Its biggest virtue is the function of making thematic maps. Everyone who has used MapInfo knows that MapInfo can be substituted by other software in other aspects but map-making and MapInfo is the most "intelligent" in this aspect. Therefore, the author shows this function to readers. She applies the Access database to MapInfo and makes some examples of making thematic maps.