The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper analyzes the input-output model based on data envelopment analysis (DEA), puts forward an input-output model of the vessel traffic services (VTS) based on DEA and builds the input and output index of this model combining with the demand characteristics of the running VTS' efficiency assessment. Combining with an instance of VTS, this paper analyzes the algorithm of the proposed model and...
The paper introduce the necessity and urgency of building data warehouse in coal mine enterprise, and then research the characteristics and architecture of data warehouse in coal mine enterprise; according to the inherent characteristics of coal mine enterprise, the typical subjects of data warehouse in coal mine enterprise are built; and according to system requirements of data warehouse in coal...
The pressure systems manager at NASA Ames Research Center (ARC) has embarked on a project to collect data and develop risk assessment models to support risk-informed decision making regarding future inspections of underground pipes at ARC. This paper shows progress in one area of this project - a corrosion risk assessment model for the underground high- pressure air distribution piping system at ARC...
The Grid offers new opportunities and raises new challenges for data integration. The Grid communities have paid great attention to data integration middle ware in grid environment. But few of those projects actually establish semantic connections among heterogeneous data sources. Recently, several resolutions of data integration in grid environment have been proposed. However most of them put their...
The technology of Data Warehouse is being widely used in decision making and data analysis. Data Warehouse generalizes and consolidates multidimensional (MD) data. Hence, Data Warehouse has become an important platform for OLAP which is based on a MD data model. Therefore, dimensional modeling is a key factor in OLAP data analysis. In this paper, we address the technology of dimensional modeling based...
The construction industry has been facing a paradigm shift to (i) increase; productivity, efficiency, infrastructure value, quality and sustainability, (ii) reduce; lifecycle costs, lead times and duplications, via effective collaboration and communication of stakeholders in construction projects. Digital construction is a political initiative to address low productivity in the sector. This seeks...
For the effective control of dam life process, it is important to implement the real-time diagnosis and reasonable evaluation for dam safety based on prototype observations. The development of intelligent early-warning systems of dam safety (IEWSDS) is a significant approach to realize above aim. This paper regarded dam as a vital and intelligent system, thereby constructed a bionics model of dam...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.