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Groundwater management and water quality assessment in the City of Vienna
Published in Jos H. Peters, Artificial Recharge of Groundwater, 2020
The groundwater management and surveillance system is supported by a hydrological information system (HIS), a modern data base system that provides a full pallet of tools and functions necessary for the capturing, storing and analysing of aquatic environment related data. The HIS concept is based on the client-server principle with ORACLE as data base platform using tools like ORACLE-CDE, ARCInfo, AutoCAD or other external programs with embedded SQL-functions. A Windows based program serves as user interface. Additionally to the available functions it offers a set of predefined DDE (OLE) calls supporting direct data exchange between HIS and other Windows programs like Excel, Winword, Powerpoint, ARCView, COREL Draw).
Drivers
Published in Rick Bitter, Taqi Mohiuddin, Matt Nawrocki, LabVIEW™ Advanced Programming Techniques, 2017
Rick Bitter, Taqi Mohiuddin, Matt Nawrocki
Dynamic Data Exchange (DDE) is a method of communication between Windows applications. This communication standard is no longer supported in the current versions of LabVIEW. The following text discusses support in earlier versions of LabVIEW.
Design of a freeform lens array based on an adjustable Cartesian candela distribution
Published in Journal of Modern Optics, 2019
Shuyan Lin, Jinhui Yu, Jing Cai, Enguo Chen, Sheng Xu, Yun Ye, Tailiang Guo
As shown in Figure 5, the slope angle γi of any point Pi (zi, yi) and the slope angle γi+1 of its adjacent point Pi+1 (zi+1, yi+1) are calculated by the following formulas, respectively: Equation (9) provides the parameterized realization of the surface discretization. After obtaining these discrete points, the dynamic data interaction method (DDE) is used to model the freeform lens (22). The DDE is a communication protocol created by Microsoft for applications internally linked to Windows operating systems. Data exchange is available between two applications under the same DDE protocol. In this paper, the coordinate data of the freeform surface are calculated and obtained in MATLAB, and the optical simulation and analysis are performed in TracePro. The data are exchanged between MATLAB and TracePro through the DDE.